CN208296295U - A kind of domestic hot-water's pipeline latter end water temperature-adjusting device - Google Patents

A kind of domestic hot-water's pipeline latter end water temperature-adjusting device Download PDF

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Publication number
CN208296295U
CN208296295U CN201721672523.6U CN201721672523U CN208296295U CN 208296295 U CN208296295 U CN 208296295U CN 201721672523 U CN201721672523 U CN 201721672523U CN 208296295 U CN208296295 U CN 208296295U
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water
opening
connecting tube
threeway
pipeline
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CN201721672523.6U
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Chinese (zh)
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宋景涛
王强
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Abstract

The utility model provides a kind of domestic hot-water's pipeline latter end water temperature-adjusting device, the first threeway including water flow lane change can be made, first threeway includes first pipe, it is located at first opening at the both ends of the first pipe, second opening and the third opening being vertically set among the pipeline, the water flow lane change device with reset function is provided in the first pipe, one end of the water flow lane change device is rotatably coupled to the junction of the third opening and first pipe, the other end of the water flow lane change device can be contradicted in third opening with another junction of first pipe or conflict in the case where rotation on the lower wall of the first pipe.Water in end pipeline can be effectively maintained to the temperature threshold section of setting, the local for keeping the water heater product of any kind administrative flows out hot water with the hot water tap of any one hot water water spot in water environment at once when opened.

Description

A kind of domestic hot-water's pipeline latter end water temperature-adjusting device
Technical field
The utility model relates to domestic hot-water's pipe water cycle engineering device technique field, in particular to a kind of domestic hot-water's pipeline Latter end water temperature-adjusting device.
Background technique
In the prior art, under the conditions of no hot water backwater's pipeline of laying in advance, the hot water outlet of each kind water heater Each of in the hot water local water environment that the hot water piping extended is formed when opened with the hot water tap of water spot, not Hot water can be flowed out at once, this is because this section of long or short hot water pipeline memory keeps more or less water, so, hot water When administrative each of device is opened with the hot water tap of water spot, can all there be light or heavy hot water late to phenomenon, hot water pipeline Distance it is longer, this phenomenon is more prominent.The uncomfortable inconvenience of user, wastes a large amount of water resource.
For this phenomenon, the best solution of the prior art is in the administrative local pipeline environment of water heater, in advance Lay hot-water return pipeline.But the cost for laying hot-water return pipeline in advance is high, the period is long, and in addition this method is not applicable In a large amount of users without laying hot water backwater's pipeline in advance.For the local water environment for solving Non-precondition hot water backwater pipeline Interior the problem of going out hot water fastly with water spot, the existing alternative solution of another kind of the prior art: i.e. in the administrative local pipe of water heater The hot water or cold water that with water spot will be close to tap position effective one company with check valve apparatus farthest apart from water heater in road Adapter tube is connected, while being arranged in series a band on the cold water inlet (being also possible to hot water outlet pipe) close to water heater host There is water pump circulator, the water piggybacking cold water pipes circulating reflux in the administrative hot-water line of water heater can be made in this way, through overheating Hydrophone heating is delivered back into hot water pipeline again, carries out circulating-heating to the water in hot water pipeline to realize.This solution Water heater local may be implemented with being gone here and there in water environment and when being opened with the hot water tap of water spot of position in scheme, flows out quickly Hot water is also less installed and improves in local pipeline environment other before this device and use hot water effluent's speed of water spot.But this is existing There is technical functionality device to have the following problems: one, which is the burner or heating dress by the water heater body of institute's compatibility It sets and circulating-heating is carried out to water in water pipe, which increases the load to water heater body in operational process.For example, with combustion When gas water heater compatible use, frequently starting repeatedly for hot gas water heater combustor will cause, it may during device operation The detonation sound of burner ignition is frequently generated, user's impression is bad;When the device and air energy water heater compatible use, by The water of lower temperature in water pipe is transmitted back to air energy water heater water tank in constantly, water temperature in water tank is caused to reduce, It may cause compressor frequent starting within short time interval, increase the workload of compressor, or even influence its service life.Two, It, all may be serious if user opens any one of local water environment cold water faucet in the device operational process Influence or interrupt the operation of the device.Three, when there are multiple with water spot in local water environment, which can only guarantee local Some for being mounted with check valve apparatus in pipeline environment specifically forms complete circulation with water spot, makes this with the heat of water spot Tap can flow out hot water quickly.The device can not upgrade to multicomputer linkage, other branches water spot can not participate in entirely The complete complete alternation of journey, so other in same local water environment still can have different degrees of heat with the hot water tap of water spot Water is late to phenomenon.
Utility model content
The utility model provides a kind of domestic hot-water's pipeline latter end water temperature-adjusting device, can be effectively by latter end pipe Water in road is maintained at the temperature threshold section of setting, in the local water environment for keeping the water heater product of any kind administrative The hot water tap of any hot water water spot flow out hot water at once when opened.
To achieve the goals above, the utility model the following technical schemes are provided:
A kind of domestic hot-water's pipeline latter end water temperature-adjusting device, it is characterised in that: including water flow lane change can be made One threeway 116, the first threeway 116 include first pipe, be located at the first pipe both ends the first opening 1161, the Two openings 1162 and the third opening 1163 being vertically set among the pipeline, are provided in the first pipe with multiple The water flow lane change device 1164 of bit function, one end of the water flow lane change device 1164 are rotatably coupled to the third opening 1163 can contradict in the case where rotation in institute with the junction of first pipe, the other end of the water flow lane change device 1164 It states third opening 1163 and another junction of first pipe or contradicts on the lower wall of the first pipe, make from the The water flow in one 1161 directions of opening smoothly flows to the second opening 1162.
Preferably, the one side of the water flow lane change device 1164 for curved surface or has the line of rabbet joint.
Preferably, further includes: positive displacement electric heater unit 102, the positive displacement electric heater unit 102 are connected to the second threeway 117 third opening 1173, the positive displacement electric heater unit 102 is provided with water level inductor 120 and leak leakage protection Sensing device 121.
Preferably, further includes: water pump 101, the first connecting tube 103 and the second connecting tube 104, in the second connecting tube 104 It is provided with temperature sensing device 113.One end 1042 of second connecting tube 104 is connected to the water inlet 1011 of water pump 101, and second The other end 1041 of connecting tube 104 extend as 100 main body of domestic hot-water's pipeline latter end water temperature-adjusting device into Mouthful, the water outlet 1012 of water pump 101 is connected by the first connecting tube 103 and the first opening 1021 of positive displacement electric heater unit 102 Logical, it is thermostatic out that the second opening 1022 of positive displacement electric heater unit 102 leads to domestic hot-water's pipeline latter end water Mouthful.
Preferably, further includes: third connecting tube 115, the first check valve apparatus 112 being arranged in the first connecting tube 103, One end of third connecting tube 115 is connected to the first connecting tube 103, one end of the third connecting tube 115 and the first connecting tube 103 tie point is located at the pipeline section that the first check valve apparatus 112 is connect with the first opening 1021 of positive displacement electric heater unit 102 Between, the other end of third connecting tube 115 is connected to the second connecting tube 104, and the other end of third connecting tube 115 is connect with second The tie point of pipe 104 is in the pipe in the second connecting tube 104 between temperature sensing device 113 and water flow sensing device 114 Duan Shang is provided with second one-way valve device 1121 in third connecting tube 115.
Preferably, comprising: be provided with the knot of the second threeway 117, the structure of second threeway 117 and the first threeway 116 Structure is identical, 1173 connection the tenth connecting tube 1024 of third opening of second threeway 117, second threeway 117 Second opening 1172 with towards being connected to the hot water pipeline of water spot.
Preferably, water flow sensing device 114 is additionally provided in the second connecting tube 104.
Preferably, comprising: be provided with third threeway 118 and the 4th threeway 119, the first opening of the third threeway 118 1181 lead to the second opening 1162 of the first threeway 116, and are connected to the second opening of the positive displacement electric heater unit 102 1022, the third opening 1183 of the third threeway 118 and the third opening 1193 of the 4th threeway 119 pass through the 9th connecting tube 111 are connected to, and third check valve apparatus 1122, the first opening of the 4th threeway 119 are provided in the 9th connecting tube 111 1191 lead to the second opening 1072 of the second threeway 117, the second opening 1192 of the 4th threeway 119 with lead to the mixed fire hose The 7th connecting tube 109 connection of the cooling water outlet of head.
Preferably, the 4th is provided on the third opening 1023 of the positive displacement electric heater unit 102 or connector 1026 Check valve apparatus 1025.
It preferably, further include operation presetting apparatus 122, which distinguishes the temperature sense dress Set 113, water level inductor 120, positive displacement electric heater unit 102, water flow sensing device 114 and water pump 101.
By implementing above technical scheme, domestic hot-water's pipeline end provided by the utility model is had following technical effect that Water in end pipeline can be effectively maintained at the temperature threshold section of setting by Duan Cunshui temperature-adjusting device, make to appoint The local that the water heater product of what kind is administrative is stood when opened with the hot water tap of any hot water water spot in water environment Carve outflow hot water.The utility model forms circulation by the water in water pump driving pipe section, heats dress by built-in positive displacement It sets and is heated, meanwhile, any load is not generated to the water heater body of institute's compatibility while keeping water heating in pipeline. The utility model is suitble to any hot and cold water pipe environment to install, and it is not necessary that existing hot and cold water pipe condition is transformed, can greatly save Installation cost, meanwhile, user opens any one hot water or cold water in local water environment in the utility model operational process It all will not influence and destroy lasting holding of the utility model to hot-water line memory coolant-temperature gage when leading.
Detailed description of the invention
Fig. 1 is the thermostatic structural schematic diagram of domestic hot-water's pipeline latter end water provided by the utility model;
Fig. 2 is that domestic hot-water's pipeline latter end water temperature-adjusting device provided by the utility model increases third connecting tube etc. Schematic diagram after component;
Fig. 3 is another example structure of the utility model and connected mode schematic diagram
Fig. 4 is thermostatic first threeway, 116 knot of domestic hot-water's pipeline latter end water provided by the utility model Structure schematic diagram;
Fig. 5 is that thermostatic first threeway 116 of domestic hot-water's pipeline latter end water provided by the utility model exists Configuration state figure under two kinds of flow paths.
Specific embodiment
In order to better understand the technical solution of the utility model, the utility model is described in detail with reference to the accompanying drawing and provides Embodiment.
The utility model embodiment provides a kind of domestic hot-water's pipeline latter end water temperature-adjusting device, such as Fig. 1-Fig. 5 institute Show comprising the first threeway 116 of water flow lane change can be made, the first threeway 116 includes first pipe, is divided in first threeway 116 Be not provided with positioned at the both ends of the first pipe first the 1161, second opening 1162 of opening and be vertically set on the pipeline Intermediate third opening 1163 is provided with the water flow lane change device 1164 with reset function, the water in the first pipe One end of rheology road device 1164 is rotatably coupled to the junction of third opening 1163 with first pipe, and described first The other end of water flow lane change device 1164 can be contradicted in the case where rotation in third opening 1163 and first pipe Another junction contradicts on the lower wall of the first pipe.When the water flow from the first opening 1061 is larger, water flow Lane change device 1164 can open the channel of the first opening 1061 to the second opening 1062, make from the first 1161 directions of opening Water flow smoothly flow to the second opening 1162.When not having water flow from the first opening 1161, water flow lane change device 1164 is in The state in 1161 to the second 1162 channels of opening of the first opening of closing, the water flow at this time from third opening 1163 can be to second Be open the flowing of 1162 directions.In practical applications, it can according to need the lane change direction of setting adjustment water flow lane change device 1164, As shown in Figure 4, Figure 5.In this embodiment, it is preferred that the one side of the water flow lane change device 1164 is curved surface or has the line of rabbet joint, with Exempt from complete in the channel that will open into third opening 1063 under the water flow pressure that the first opening 1161 flows to the second opening 1162 Closing.
First opening 1161 of the first threeway 116 is directly connected to by connecting tube 107 or with the cold water inlet of water heater, Second opening 1162 of the first threeway 116 is connect and first with third threeway 119 with the connecting tube 105 for leading to cold water water spot 1191 connection of opening.
In other embodiments, on that basi of the above embodiments, further, domestic hot-water's pipeline latter end water temperature Regulating device is spent, further includes positive displacement electric heater unit 102, the positive displacement electric heater unit 102 is connected to second threeway 117 third opening 1173, be provided in the water storage container of the positive displacement electric heater unit 102 water level inductor 120, Leak leakage protection sensing device 121.It is protected when with the height of sensed water level and to leak and electric leakage.Specifically, volume The second opening 1022 positioned at lower part of formula electric heater unit 102 is connected to second threeway 117 by the tenth connecting tube 1024 Third opening 1173.The positive displacement electric heater unit 102 further includes the first opening 1021.Pass through the positive displacement electric heater unit 102 pairs are heated into the water before second threeway 117.
In other embodiments, on that basi of the above embodiments, further, domestic hot-water's pipeline latter end water temperature Regulating device 100 is spent, further includes water pump 101, operating status presetting apparatus 122, the first connecting tube 103 and the second connecting tube 104, temperature sensing device 113 and water flow sensing device 114 are provided in the second connecting tube 104.With detect water temperature and The flow of water is detected, and operating status presetting apparatus 122 is separately connected the temperature sensing device 113, positive displacement electricity Heating device 102, water level inductor 120, water flow sensing device 114 and water pump 101 are filled with being incuded according to water flow The case where setting 114 flow status and water level controls the uninterrupted of water pump 101, one end 1042 of the second connecting tube 104 It is connected to the water inlet 1011 of water pump 101, the other end 1041 of the second connecting tube 104 extends as domestic hot-water's pipeline The water outlet 1012 of the import of 100 main body of latter end water temperature-adjusting device, water pump 101 passes through the first connecting tube 103 and volume 1021 connection of the first opening of formula electric heater unit 102, specifically, described in 1031 connection of the first opening of the first connecting tube 103 First opening 1021 of positive displacement electric heater unit 102, the second opening 1022 of positive displacement electric heater unit 102 and the second threeway 107 1173 connection of third opening.The water outlet 1012 of the 1032 connection water pump 101 of the second opening of first connecting tube 103.It is transporting Under the control of line program control device 122, when water pump 101 passes through the low temperature value signal that temperature sensing device 113 senses setting Afterwards, water pump 101 is started to work, and is extracted water at low temperature by the second connecting tube 104 and is passed through the first connecting tube 103 for the low temperature of extraction Water is delivered to positive displacement electric heater unit 102.
In other embodiments, on that basi of the above embodiments, further, domestic hot-water's pipeline latter end water temperature Spend regulating device, further includes: be provided with second one-way valve 1121 in third connecting tube 115, third connecting tube 115, setting is the The first check valve apparatus 112 in one connecting tube 103, one end of third connecting tube 115 is connected to the first connecting tube 103, described The tie point of one end of third connecting tube 115 and the first connecting tube 103 is located at the first check valve apparatus 112 and positive displacement electric heating Between the pipeline section of 1021 connection of the first opening of device 102, the other end of third connecting tube 115 is connected to the second connecting tube 104, The other end of third connecting tube 115 and the tie point of the second connecting tube 104 are in temperature sensing device in the second connecting tube 104 On pipeline section between 113 and water flow sensing device 114, second one-way valve device is provided in third connecting tube 115 1121.The effect of third connecting tube 115 is to be connected to the first connecting tube 103 with the second connecting tube 104, and working is that can allow The water flow that non-water pump 101 actively extracts is straight around water pump 101 one section directly by the second connecting tube 104 through the first connecting tube 103 It taps into and is heated into positive displacement electric heater unit 102.The effect of second one-way valve 1121 in third connecting tube 115 is set It is that the water flow for preventing water pump 101 from actively extracting is back to the second connecting tube 104 by the first connecting tube 103.
In other embodiments, on that basi of the above embodiments, further, domestic hot-water's pipeline latter end water temperature Spend regulating device, further includes: be provided with the second threeway 117, third threeway 118 and the 4th threeway 119, second threeway 117 1173 connection the tenth connecting tubes 1024 of third opening, the other end and positive displacement electric heater unit of the tenth connecting tube 1024 102 1022 connection of the second opening.The second of 1181 connection second threeway 117 of the first opening of the third threeway 118 Opening 1172,1172 the 4th connecting tube 106 of connection of the second opening of the second threeway 117, the third opening of the second threeway 117 1173 the 5th connecting tubes 108 of connection, the 5th connecting tube 108 is to lead to the connecting tube of water heater hot-water water outlet.Second threeway 117 Including the second water flow lane change device 1174, the first opening 1171 of the second threeway 117 leads to water heater hot-water water outlet 5th connecting tube 108, the second threeway 117 second opening 1172 are connected to the first of the 4th threeway 118 by the 4th connecting tube 106 Opening 1181, the 4th connecting tube 106 is the heat for being connected to the water outlet of device provided by the utility model to hot water water spot Waterpipe.Second opening 1192 of the 4th threeway 119 is connected to water mixing valve cold water endpoint by the 7th connecting tube 109.The third Threeway 118 third opening 1183 by the 9th connecting tube 111 be connected to the 4th threeway 119 third opening 1193, the described 8th It is provided with third check valve apparatus 1122 in connecting tube 111, the structure of the second threeway 117 and is functionally equivalent to the first threeway 116. First opening 1171 of the second threeway 117 is directly connected to by the 5th connecting tube 108 or with the hot water outlet of water heater.Second Second opening 1172 of threeway 117 with the hot-water line 106 in water spot direction is connected to and in communication with the first of third threeway 118 with leading to The third opening 1183 of opening 1181, third threeway 118 is open by the 9th connecting tube 111 and the third of the 4th threeway 119 1193 connections, so as to form the water circulation channel in 101 operational process of water pump.It is arranged in the 9th connecting tube 111 The effect of three check valve apparatus 1122 is to prevent the water flow of 119 side of the 4th threeway from flowing to 118 side of third water pump.Three or three Logical 118 the second opening 1182 is connected to the connecting tube 110 for leading to water spot hot water outlet.Second opening of the 4th threeway 119 1192 are connected to the connecting tube 109 for leading to water spot cooling water outlet.
In other embodiments, on that basi of the above embodiments, further, domestic hot-water's pipeline latter end water temperature Spend regulating device, further includes: the positive displacement electric heater unit 102 is provided with third opening 1023, opens in third opening 1023 The 4th check valve apparatus 1025 is provided at mouthful or on connector 1026.The third opening 1023 or connector 1026 are connected to 5th connecting tube 108, the 5th connecting tube 108 are to lead to the connecting tube of water heater hot-water water outlet.4th check valve apparatus 1025 effect is that the water flow except the third opening 1023 from positive displacement electric heater unit 102 is only allowed to enter positive displacement electricity 102 cavity of heating device does not allow the intracorporal water of 102 chamber of positive displacement electric heater unit back through positive displacement electric heater unit 102 1023 outflow of third opening.The water for exporting out by water heater hot-water can pass through the water of positive displacement electric heater unit 102 Case mixing, reducing the especially issuable a bit of cold water of gas heater burner's warm-up phase may bring to user Discomfort.
Above to a kind of domestic hot-water pipeline latter end water temperature-adjusting device provided by the utility model embodiment into It has gone and has been discussed in detail, for those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in specific embodiment party There will be changes in formula and application range, in conclusion the content of the present specification should not be construed as the limit to the utility model System.

Claims (10)

1. a kind of domestic hot-water's pipeline latter end water temperature-adjusting device, it is characterised in that: first including water flow lane change can be made Threeway (116), the first threeway (116) include first pipe, be located at the first pipe both ends first opening (1161), the second opening (1162) and the third being vertically set among the pipeline are open (1163), in the first pipe It is provided with the water flow lane change device (1164) with reset function, one end of the water flow lane change device (1164) rotatably connects The junction in third opening (1163) and first pipe is connect, the other end of the water flow lane change device (1164) is rotating In the case where can contradict the third opening (1163) and first pipe another junction or contradict described first On the lower wall of pipeline, the water flow from first opening (1161) direction is made smoothly to flow to the second opening (1162).
2. domestic hot-water's pipeline latter end water temperature-adjusting device as described in claim 1, which is characterized in that the water flow lane change The one side of device (1164) is curved surface or has the line of rabbet joint.
3. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 2, which is characterized in that further include: volume The third of formula electric heater unit (102), positive displacement electric heater unit (102) connection the second threeway (117) is open (1173), The positive displacement electric heater unit (102) is provided with water level inductor (120) and leak leakage protection sensing device (121).
4. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 3, which is characterized in that further include: water pump (101), the first connecting tube (103) and the second connecting tube (104), are provided with temperature sensing device on the second connecting tube (104) (113), one end (1042) of the second connecting tube (104) is connected to the water inlet (1011) of water pump (101), the second connecting tube (104) the other end (1041) extend as domestic hot-water's pipeline latter end water temperature-adjusting device (100) main body into Mouthful, the water outlet (1012) of water pump (101) is opened by the first connecting tube (103) with the first of positive displacement electric heater unit (102) Second opening (1022) of mouth (1021) connection, positive displacement electric heater unit (102) leads to domestic hot-water's pipeline latter end water temperature Spend the outlet of regulating device.
5. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 4, which is characterized in that further include: third Connecting tube (115), the first check valve apparatus (112) being arranged on the first connecting tube (103), the one of third connecting tube (115) End is connected to the first connecting tube (103), one end of the third connecting tube (115) and the connection point of the first connecting tube (103) Between the pipeline section that the first check valve apparatus (112) is connect with the first opening (1021) of positive displacement electric heater unit (102), the The other end of three connecting tubes (115) is connected to the second connecting tube (104), and the other end of third connecting tube (115) is connect with second The tie point of pipe (104) is in temperature sensing device (113) and water flow sensing device (114) in the second connecting tube (104) Between pipeline section on, second one-way valve device (1121) are provided in third connecting tube (115).
6. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 5 characterized by comprising be provided with Second threeway (117), the structure of second threeway (117) are identical as the structure of the first threeway (116), second threeway (117) third opening (1173) be connected to the tenth connecting tube (1024), second threeway (117) second opening (1172) with It is connected to towards with the hot water pipeline of water spot.
7. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 6, which is characterized in that in the second connecting tube (104) water flow sensing device (114) are additionally provided on.
8. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 7 characterized by comprising be provided with First opening (1181) of third threeway (118) and the 4th threeway (119), the third threeway (118) leads to the first threeway (116) the second opening (1162), and it is connected to the second opening (1022) of the positive displacement electric heater unit (102), described the The third opening (1183) of three threeways (118) and the third opening (1193) of the 4th threeway (119) pass through the 9th connecting tube (111) It is connected to, is provided with third check valve apparatus (1122) on the 9th connecting tube (111), the first of the 4th threeway (119) Be open second opening (1072) of (1191) towards the second threeway (117), the second opening (1192) of the 4th threeway (119) It is connected to the 7th connecting tube (109) of the cooling water outlet for leading to combination tap.
9. domestic hot-water's pipeline latter end water temperature-adjusting device (100) as claimed in claim 8, which is characterized in that the appearance The 4th check valve apparatus is provided in the third opening (1023) or connector (1026) of product formula electric heater unit (102) (1025)。
10. domestic hot-water's pipeline latter end water temperature-adjusting device as claimed in claim 9, which is characterized in that further include operation Presetting apparatus (122), the temperature sensing device (113), positive displacement electricity add the operation presetting apparatus (122) respectively Thermal (102), water level inductor (120), water flow sensing device (114) and water pump (101).
CN201721672523.6U 2017-12-05 2017-12-05 A kind of domestic hot-water's pipeline latter end water temperature-adjusting device Expired - Fee Related CN208296295U (en)

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CN201721672523.6U CN208296295U (en) 2017-12-05 2017-12-05 A kind of domestic hot-water's pipeline latter end water temperature-adjusting device

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CN201721672523.6U CN208296295U (en) 2017-12-05 2017-12-05 A kind of domestic hot-water's pipeline latter end water temperature-adjusting device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107860124A (en) * 2017-12-05 2018-03-30 王强 A kind of domestic hot-water's pipeline latter end water temperature-adjusting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107860124A (en) * 2017-12-05 2018-03-30 王强 A kind of domestic hot-water's pipeline latter end water temperature-adjusting device

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Granted publication date: 20181228

Termination date: 20201205