CN206113722U - Bathroom shower waste water waste heat recovery device - Google Patents
Bathroom shower waste water waste heat recovery device Download PDFInfo
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- CN206113722U CN206113722U CN201621060838.0U CN201621060838U CN206113722U CN 206113722 U CN206113722 U CN 206113722U CN 201621060838 U CN201621060838 U CN 201621060838U CN 206113722 U CN206113722 U CN 206113722U
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- housing
- heat exchange
- water supply
- tube
- shower waste
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Abstract
The utility model relates to a bathroom shower waste water waste heat recovery device, including a casing, inside the coiling of casing is provided with water supply heat transfer pipeline, and the outer tube that water supply heat transfer pipeline is led to by the cooling rivers is located outer tube inner tube inside, that supply shower waste water to circulate with the sealing spacing cover and is constituted, constitutes the annular space between inner tube and the outer tube, water supply heat transfer pipeline is worn out the outer tube, is just fed through with drainage pipe near the interior seal of tube of the one end at the edge of casing, and water supply heat transfer pipeline lies in the seal of tube of the other end of the center department of casing and wears out the outer tube, just is provided with shower waste water to enter the mouth, water supply heat transfer pipeline is close to the outer tube and cold water conduit intercommunication of the one end at the edge of casing, the sealed intercommunication of cold water operative installations after outer tube that water supply heat transfer pipeline lies in the center department of casing and the heat transfer. The device can effective recycling utilizes heat in the shower waste water, realizes energy -concerving and environment -protectively.
Description
Technical field
This utility model is related to heat recovery technology field in bathroom, more particularly to a kind of bathroom shower waste water residual heat is reclaimed
Device.
Background technology
Data results find, use in daily life hot water it is most be bathing, 95% people is in bathing
Hot water can be used, shower water is usually cold water and the mixed warm water of hot water, and temperature is about between 38 degree of -42 degree.According to system
Meter, everyone hourly water consumption that takes a shower every time average are about 30-90 liters, and the water temperature of the waste water after shower is typically between 36 degree of -40 degree.
In prior art, include shower waste in the bathroom of certain heat and be directly entered sewer and flow away, the heat of shower waste is white
White to be lost in, where colleges and universities, colliery, oil field etc. are concentrated use in shower, heat waste is more.Although in chemical plant, steam power plant
Etc. ground application have large-scale waste-heat recovery device, but these device volumes are huge, complex structure, be not appropriate in bathroom use.
Thus, the present inventor is proposed more than a kind of bathroom shower waste water by the experience and practice of being engaged in relevant industries for many years
Heat reclamation device, fully reclaims and applies bathroom shower waste water heat, realize energy-conserving and environment-protective.
Utility model content
The purpose of this utility model is to provide a kind of bathroom shower waste water heat recovering equipment, and the device effectively can be returned
Receive using heat in shower waste, realize energy-conserving and environment-protective.
The purpose of this utility model is achieved in that a kind of bathroom shower waste water heat recovering equipment, and the bathroom drenches
Bath waste water heat recovering equipment includes a housing, and the enclosure interior coiling is provided with water supply heat exchange pipeline, the water supply heat exchange
Inner tube structure that the outer tube and sealed spacer that pipeline is led to by cooling current is sheathed on the outer tube, circulating for shower waste
Into constituting annular space between said inner tube and the outer tube；The water supply heat exchange pipeline is near the one end at the edge of the housing
Said inner tube sealing is passed the outer tube and is connected with drainage pipeline, and the water supply heat exchange pipeline is located at the center of the housing
The said inner tube sealing of the other end at place passes the outer tube and is provided with shower waste entrance；The water supply heat exchange pipeline is leaned on
The outer tube of the one end at the edge of the nearly housing is connected with cold water pipes, and the water supply heat exchange pipeline is located at the housing
The outer tube of center is connected with cold water use device sealing after heat exchange.
In a better embodiment of the present utility model, the two ends of the outer tube seal and are provided with and communicated with inner tube suit
Use joint.
In a better embodiment of the present utility model, said inner tube suit joint includes first set joint, institute
State the outer tube of the water supply heat exchange pipeline near the one end at the edge of the housing to connect with first set joint sealing, institute
Stating first set joint includes first interface, second interface and the 3rd interface, and the first interface is connected with the outer seal of tube,
The second interface is relative with the first interface, and arrange in sealing, and the water supply heat exchange pipeline is near the side of the housing
One end of edge said inner tube sealing pass the second interface after connect with the drainage pipeline, the 3rd interface with it is described
First interface is vertical, and in horizontally disposed, the 3rd seam is sealedly connected with the first connecting tube, first connecting tube
One end and the 3rd orifice, the other end of first connecting tube pass the housing and close with the cold water pipes
Envelope connection.
In a better embodiment of the present utility model, said inner tube suit joint includes second set of joint, institute
State the outer tube of the water supply heat exchange pipeline positioned at one end of the center of the housing to connect with the described second suit joint sealing,
Second set of joint includes the 4th interface, the 5th interface and the 6th interface, and the 4th interface is connected with the outer seal of tube
Logical, the 5th interface is vertical with the 4th interface, and arrange in vertically sealing, and the water supply heat exchange pipeline is positioned at the shell
The pouring of upward opening is constituted after 5th interface described in the other end hermetically passing of the said inner tube of one end of the center of body
Bath waterwater entrance, the 6th seam are sealedly connected with the second connecting tube, one end of second connecting tube and the described 6th
Orifice, the other end of second connecting tube pass the housing and with the heat exchange after the sealing of cold water use device connect
It is logical.
In a better embodiment of the present utility model, the first set joint and second set of joint are 3D
Print joint.
In a better embodiment of the present utility model, the housing includes bottom tray, the water supply heat exchange pipeline
In the bottom tray, the top of the bottom tray is removedly provided with polywater disk, the water supply heat exchange pipeline position
The base plate of polywater disk described in said inner tube hermetically passing in one end of the center of the housing and with the base plate on arrange
An open-work connection, cover plate is provided with the top of the polywater disk, multiple shower waste vias on the cover plate, are provided with.
In a better embodiment of the present utility model, it is provided with the side wall of the bottom tray described for wearing
Water supply heat exchange pipeline passes through hole, the side wall of the bottom tray near the first of the said inner tube of the one end at the edge of the housing
On be additionally provided with for wear the water supply heat exchange pipeline near the outer tube of the one end at the edge of the housing second lead to
Via, is provided with the side wall of the bottom tray for wearing the water supply heat exchange pipeline positioned at the center of the housing
The thirdly through hole of the outer tube of one end.
In a better embodiment of the present utility model, the housing is square casing.
In a better embodiment of the present utility model, the housing is circular shell.
In a better embodiment of the present utility model, the outer tube is pvc pipe, and said inner tube is plating Cu-AL pipe.
From the above mentioned, in the bathroom shower waste water heat recovering equipment that this utility model is provided, shower waste is by shower
Waterwater entrance enters inner tube, and cold water enters outer tube from cold water pipes, and outer tube and inner tube coiling are arranged, and shower waste and cold water
Flow direction is conversely, the advantageously heat exchange of the cold water in the shower waste in inner tube with annular space, retains in shower waste
Heat is fully utilized so that cold water is higher into the temperature after heat exchange during cold water use device, and the shower water of same temperature is needed
The hot water asked is reduced, and then reaches the purpose of energy-conserving and environment-protective；Bathroom shower waste water heat recovering equipment of the present utility model can
It is used alone, it is also possible to be used in series in bathroom；In bathroom shower waste water heat recovering equipment of the present utility model, outer tube is adopted
With the preferable pvc pipe of effect of heat insulation, the heat of internal water is preferably retained, it is to avoid dissipate outward；Inner tube adopts the preferable copper facing of heat conduction
Aluminum pipe, can rapidly realize the heat exchange of cold water and shower waste, and heat exchange efficiency is higher；Compare concentration, the frequency of having a bath in personnel
More place, the energy-saving effect of bathroom shower waste water heat recovering equipment will be considerable, is conducive to promoting the use of.
Description of the drawings
The following drawings is only intended in schematic illustration and explanation is done to this utility model, does not limit model of the present utility model
Enclose.Wherein：
Fig. 1：For the overall appearance figure of bathroom shower waste water heat recovering equipment of the present utility model.
Fig. 2：For the explosive view of bathroom shower waste water heat recovering equipment of the present utility model.
Fig. 3 a：For the structural representation in bottom tray in bathroom shower waste water heat recovering equipment of the present utility model.
Fig. 3 b：For A-A sectional views in Fig. 3 a.
In figure：
100th, bathroom shower waste water heat recovering equipment；
1st, housing；11st, bottom tray；12nd, polywater disk；13rd, cover plate；131st, shower waste via；
2nd, outer tube；21st, the first connecting tube；22nd, first set joint；221st, first interface；222nd, second interface；223rd,
Three interfaces；23rd, second set of joint；231st, the 4th interface；232nd, the 5th interface；233rd, the 6th interface；24th, the second connecting tube；
3rd, inner tube；31st, shower waste entrance；
8th, cold water use device after exchanging heat；
9th, cold water pipes.
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, now control is illustrated
Specific embodiment of the present utility model.
As shown in Figure 1, Figure 2, shown in Fig. 3 a, Fig. 3 b, this utility model provides a kind of bathroom shower waste water heat recovering equipment
100, including a housing 1, the inner disk of housing 1 is led to by cooling current around water supply heat exchange pipeline, water supply heat exchange pipeline is provided with
Outer tube 2 and sealed spacer are sheathed on inner tube 3 inside outer tube 2, for shower waste circulation and constitute, and in the present embodiment, supply
In 1 inner horizontal of housing and circumferentially shape coiling is arranged in water heat exchanger tube road, and annular space is constituted between inner tube 3 and outer tube 2, and annular space is
The passage of cold water circulation, cold water carry out heat exchange with the shower waste in inner tube 3 in annular space；Water supply heat exchange pipeline is near shell
The sealing of inner tube 3 of the one end at the edge of body 1 pass outer tube 2, and with drainage pipeline (prior art, figure not shown in) connection, supply
Water heat exchanger tube road is located at the sealing of inner tube 3 of the other end of the center of housing 1 and passes outer tube 2, and is provided with shower waste entrance
31；Outer tube 2 of the water supply heat exchange pipeline near the one end at the edge of housing 1 is connected with the sealing of cold water pipes 9, water supply heat exchange pipeline position
Connect with the sealing of cold water use device 8 after heat exchange in the outer tube 2 of the other end of the center of housing 1, in the present embodiment, change
After heat, cold water use device 8 refers to showerhead, and 2 one end of outer tube is tightly connected with the cold water inlet of gondola water faucet water mixing valve.In bath
When used in room, the waste water Jing shower wastes entrance 31 after shower enters inner tube 3, and cold water enters outer tube 2 from cold water pipes 9, outward
Pipe 2 and the coiling of inner tube 3 are arranged, and the flow direction of shower waste and cold water is conversely, the advantageously shower waste in inner tube 3
With the heat exchange of the cold water in annular space, the heat retained in shower waste is fully utilized so that after cold water enters heat exchange, cold water makes
Higher with temperature during device 8, the hot water of the shower water demand of same temperature is reduced, and then reaches the purpose of energy-conserving and environment-protective.This
The bathroom shower waste water heat recovering equipment 100 of utility model can be used alone, it is also possible to be used in series in bathroom.
Further, as shown in Figure 3 a, in order that inner tube 3 more successfully can be worn by outer tube 2, the two ends of outer tube 2 are equal
Sealing is provided with and communicated with inner tube suit joint.
Further, as shown in Figure 3 a, inner tube suit joint includes first set joint 22, and water supply heat exchange pipeline is near shell
The sealing of the outer tube 2 of the one end at the edge of body 1 and first set joint 22 is connected, first set joint 22 include first interface 221,
Second interface 222 and the 3rd interface 223, the sealing of first interface 221 and outer tube 2 connects, second interface 222 and first interface 221
Relatively, and in sealing arrange, the sealing of inner tube 3 of the water supply heat exchange pipeline near the one end at the edge of housing 1 passes second interface 222
Connect with drainage pipeline afterwards, the 3rd interface 223 is vertical with first interface 221, and in horizontally disposed, seal at the 3rd interface 223
The first connecting tube 21 is connected with, one end of the first connecting tube 21 is connected with the 3rd interface 223, and the other end of the first connecting tube 21 is worn
Go out housing 1, and with cold water pipes 9 sealing connect.
Further, as shown in Figure 3 a, inner tube suit joint includes second set of joint 23, and water supply heat exchange pipeline is located at shell
The outer tube 2 of one end of the center of body 1 is connected with second set of sealing of joint 23, and second set of joint 23 includes the 4th interface
231st, the 5th interface 232 and the 6th interface 233, the sealing of the 4th interface 231 and outer tube 2 are connected, the 5th interface 232 and the 4th interface
It is 231 vertical, and arrange in vertically sealing, water supply heat exchange pipeline is located at 3 hermetically passing of inner tube the of one end of the center of housing 1
The shower waste entrance 31 of upward opening is constituted after five interfaces 232, the second connecting tube 24 at the 6th interface 233, is sealedly connected with,
One end of second connecting tube 24 is connected with the 6th interface 233, the other end of the second connecting tube 24 pass housing 1, and with heat exchange after
The sealing connection of cold water use device 8.
Further, in order to reach better seal and ruggedness, first set joint 22 and second set of joint 23 are
3D printing joint.
Further, as shown in Figure 1, Figure 2, shown in Fig. 3 a, housing 1 includes bottom tray 11, water supply heat exchange pipeline (outer tube 2 and interior
3) in bottom tray 11, the top of bottom tray 11 is removedly provided with the polywater disk 12 with certain altitude to pipe, supplies
Water heat exchanger tube road be located at housing 1 center the other end 3 hermetically passing polywater disk 12 of inner tube base plate and with base plate on
One open-work is connected；The top of polywater disk 12 is provided with cover plate 13, and multiple shower waste vias 131 are provided with cover plate 13, is protecting
On the premise of card safety, the top surface surrounding of cover plate 13 can arrange coaming plate upwardly, preferably to gather shower waste.Drench
Bath waste water Jing shower wastes via 131 is entered in polywater disk 12, then the shower waste entrance 31 of Jing inner tubes 3 is entered in inner tube 3, with
Cold water in outer tube 2 flows out inner tube 3 after carrying out heat exchange.
Further, it is provided with the side wall of bottom tray 11 for wearing water supply heat exchange pipeline near the edge of housing 1
The first of the inner tube 3 of one end is additionally provided with the side wall of bottom tray 11 for wearing water supply heat exchange pipeline near shell by hole
The second of the outer tube 2 of the one end at the edge of body 1 is provided with the side wall of bottom tray 11 and supplies water heat exchanger tube for wearing by hole
Road is located at the thirdly through hole of the outer tube 2 of the other end of the center of housing 1.
In the present embodiment, shower person is stepped down on the cover plate 13 of housing 1, and housing 1 is square casing, or circle
Housing, the concrete size of housing 1 are determined by practical application.
Further, outer tube 2 is pvc pipe, and inner tube 3 is plating Cu-AL pipe.In the present embodiment, 3 copper coating of inner tube is purple
Copper.Outer tube 2 adopts the preferable pvc pipe of effect of heat insulation, preferably retains the heat of internal water, it is to avoid dissipate outward；Inner tube 3 adopts heat conduction
Preferably plating Cu-AL pipe, can rapidly realize the heat exchange of cold water and shower waste, and heat exchange efficiency is higher.
The theoretical basiss of bathroom shower waste water heat recovering equipment of the present utility model 100 are physicss' heat-conduction principles,
According to physicss' formula：Q=- λ St (T2-T1)/I, in formula, Q is the heat conducted along I directions by contact area S in the t times
Amount；λ is thermal conductivity, and numerical value is relevant with the species of material and state, and when 20 DEG C, the thermal conductivity of water is about 0.6W/mK；T1、T2For
Temperature I between two interfaces be from temperature be T1Face to temperature be T2Face length.By above-mentioned formula as can be seen that passing
The heat led is directly proportional to contact area, time of contact, the temperature difference, during design bathroom shower waste water heat recovering equipment 100, suitably
Increase the length of outer tube 2 and inner tube 3, increase contact area and time of contact, the heat of recovery will increase, therefore this practicality
New middle employing outer tube 2 and 3 coiling of inner tube are arranged, and are conducive to the recovery of the heat in shower waste.
In of the present utility model one specific embodiment used for one, outer tube 2 and inner tube 3 are tortuous in housing 1
Length be 9m, the external diameter of inner tube 3 is 18*10-3M, the internal diameter of inner tube 3 is 16*10-3M, the gross area are about 0.452m2, outer tube 2
External diameter be 27*10-3M, the internal diameter of outer tube 2 is 24*10-3M, the cold water time of staying in a device are about 71.3s, substitute into public
The heat that cold water can be obtained from shower waste is calculated after formula, the hot water amount saved for this is converted into, is finally calculated
Per person has a bath can be with about 0.16 degree of using electricity wisely.Compare the more place of concentration, the frequency of having a bath, bathroom shower waste water in personnel
The energy-saving effect of waste-heat recovery device 100 will be considerable.
From the above mentioned, in the bathroom shower waste water heat recovering equipment that this utility model is provided, shower waste is by shower
Waterwater entrance 31 enters inner tube 3, and cold water enters outer tube 2 from cold water pipes 9, and outer tube 2 and the coiling of inner tube 3 are arranged, and shower waste
With the flow direction of cold water conversely, the advantageously heat exchange of the cold water in the shower waste in inner tube 3 with annular space, shower waste
The heat of middle retention is fully utilized so that cold water is higher into the temperature after heat exchange during cold water use device 8, same temperature
The hot water of shower water demand is reduced, and then reaches the purpose of energy-conserving and environment-protective；Bathroom shower waste water residual heat of the present utility model is reclaimed
Device 100 can be used alone, it is also possible to be used in series in bathroom；Bathroom shower waste water residual heat of the present utility model reclaims dress
Put in 100, outer tube 2 adopts the preferable pvc pipe of effect of heat insulation, preferably retains the heat of internal water, it is to avoid dissipate outward；Inner tube 3 is adopted
Cu-AL pipe is preferably plated with heat conduction, the heat exchange of cold water and shower waste can be rapidly realized, heat exchange efficiency is higher；In personnel's ratio
Compared with the place for concentrating, having a bath the frequency more, the energy-saving effect of bathroom shower waste water heat recovering equipment 100 will be considerable, has
Beneficial to promoting the use of.
The schematic specific embodiment of this utility model is the foregoing is only, model of the present utility model is not limited to
Enclose.Any those skilled in the art, on the premise of without departing from design of the present utility model and principle, done equivalent becomes
Change and modification, the scope of this utility model protection all should be belonged to.
Claims (10)
1. a kind of bathroom shower waste water heat recovering equipment, it is characterised in that：The bathroom shower waste water heat recovering equipment bag
Include a housing, the enclosure interior coiling is provided with water supply heat exchange pipeline, the water supply heat exchange pipeline by cooling current lead to it is outer
Inner tube composition that pipe and sealed spacer are sheathed on the outer tube, circulating for shower waste, said inner tube and the outer tube
Between constitute annular space；Said inner tube sealing of the water supply heat exchange pipeline near the one end at the edge of the housing passes described outer
Pipe, and connect with drainage pipeline, the water supply heat exchange pipeline is close positioned at the said inner tube of the other end of the center of the housing
Envelope passes the outer tube and is provided with shower waste entrance；The one end of the water supply heat exchange pipeline near the edge of the housing
The outer tube connect with cold water pipes, the water supply heat exchange pipeline be located at the housing center the outer tube with heat exchange
Cold water use device sealing connection afterwards.
2. bathroom shower waste water heat recovering equipment as claimed in claim 1, it is characterised in that：The two ends of the outer tube are close
Envelope is provided with and communicated with inner tube suit joint.
3. bathroom shower waste water heat recovering equipment as claimed in claim 2, it is characterised in that：Said inner tube suit joint
Including first set joint, the outer tube and described first of the water supply heat exchange pipeline near the one end at the edge of the housing
Suit joint sealing connection, the first set joint include first interface, second interface and the 3rd interface, the first interface
Connect with the outer seal of tube, the second interface is relative with the first interface, and arrange in sealing, the confession water heat exchanger tube
Said inner tube sealing of the road near the one end at the edge of the housing is passed,
3rd interface is vertical with the first interface, and in horizontally disposed, the 3rd seam is sealedly connected with the first connection
Pipe, one end of first connecting tube and the 3rd orifice, the other end of first connecting tube pass the housing,
And connect with cold water pipes sealing.
4. bathroom shower waste water heat recovering equipment as claimed in claim 3, it is characterised in that：Said inner tube suit joint
Including second set of joint, the water supply heat exchange pipeline is located at the outer tube of one end of the center of the housing with described the
Two suit joint sealing connections, second set of joint include the 4th interface, the 5th interface and the 6th interface, and the described 4th connects
Mouthful connect with the outer seal of tube, the 5th interface is vertical with the 4th interface, and in vertically sealing setting, the water supply
Structure after 5th interface described in other end hermetically passing of the heat exchange pipeline positioned at the said inner tube of one end of the center of the housing
Into the shower waste entrance of upward opening, the 6th seam is sealedly connected with the second connecting tube, second connection
One end of pipe and the 6th orifice, the other end of second connecting tube pass the housing and with the heat exchange after
The sealing connection of cold water use device.
5. bathroom shower waste water heat recovering equipment as claimed in claim 4, it is characterised in that：The first set joint and
Second set of joint is 3D printing joint.
6. the bathroom shower waste water heat recovering equipment as described in claim 1 or 4, it is characterised in that：The housing includes bottom
Portion's pallet, the water supply heat exchange pipeline are located in the bottom tray, and the top of the bottom tray is removedly provided with poly-
Water pond, polywater disk described in said inner tube hermetically passing of the water supply heat exchange pipeline positioned at one end of the center of the housing
Base plate and connect with the open-work arranged on the base plate, at the top of the polywater disk, be provided with cover plate, arrange on the cover plate
There are multiple shower waste vias.
7. bathroom shower waste water heat recovering equipment as claimed in claim 6, it is characterised in that：The side wall of the bottom tray
On be provided with and pass through near the first of the said inner tube of the one end at the edge of the housing for wearing the water supply heat exchange pipeline
Hole, is additionally provided with the side wall of the bottom tray for wearing the water supply heat exchange pipeline near the one of the edge of the housing
The second of the outer tube at end is provided with the side wall of the bottom tray for wearing the water supply heat exchange pipeline position by hole
In the thirdly through hole of the outer tube of one end of the center of the housing.
8. bathroom shower waste water heat recovering equipment as claimed in claim 6, it is characterised in that：The housing is square shell
Body.
9. bathroom shower waste water heat recovering equipment as claimed in claim 6, it is characterised in that：The housing is toroidal shell
Body.
10. the bathroom shower waste water heat recovering equipment as described in claim 1 or 4, it is characterised in that：The outer tube is PVC
Pipe, said inner tube are plating Cu-AL pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621060838.0U CN206113722U (en) | 2016-09-18 | 2016-09-18 | Bathroom shower waste water waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621060838.0U CN206113722U (en) | 2016-09-18 | 2016-09-18 | Bathroom shower waste water waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206113722U true CN206113722U (en) | 2017-04-19 |
Family
ID=58520109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621060838.0U Active CN206113722U (en) | 2016-09-18 | 2016-09-18 | Bathroom shower waste water waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206113722U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225059A (en) * | 2018-02-17 | 2018-06-29 | 吴新祥 | A kind of waste water heat recovering equipment and the shower bath for including it |
| CN111795503A (en) * | 2020-07-14 | 2020-10-20 | 葛时欢 | Heat energy shunting and recovering device for large bathing place |
-
2016
- 2016-09-18 CN CN201621060838.0U patent/CN206113722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225059A (en) * | 2018-02-17 | 2018-06-29 | 吴新祥 | A kind of waste water heat recovering equipment and the shower bath for including it |
| CN111795503A (en) * | 2020-07-14 | 2020-10-20 | 葛时欢 | Heat energy shunting and recovering device for large bathing place |
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