CN115930454A - Energy-saving control method and system and zero-cold water system of water heater - Google Patents

Energy-saving control method and system and zero-cold water system of water heater Download PDF

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Publication number
CN115930454A
CN115930454A CN202211522295.XA CN202211522295A CN115930454A CN 115930454 A CN115930454 A CN 115930454A CN 202211522295 A CN202211522295 A CN 202211522295A CN 115930454 A CN115930454 A CN 115930454A
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China
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water
pipeline
circulating
water heater
circulating pipeline
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Chinese (zh)
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黄启彬
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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Abstract

The invention belongs to the technical field of water heaters, and particularly discloses an energy-saving control method and system and a zero-cold-water system of a water heater, wherein the energy-saving control method comprises the following steps: s1, controlling a circulating water pump to operate, controlling a heat exchanger of a water heater to operate, and starting circulating preheating; s2, when the water temperature of a preset position point in the circulating pipeline is detected to be more than or equal to a first preset valueTemperature T 1 And then controlling the circulation pipeline to be closed at a preset position point, wherein the preset position point is positioned between a communication position of the circulation pipeline and a cold water interface of the water using end and a communication position of the circulation pipeline and a hot water interface of the water using end. According to the invention, the preset position point is arranged on the circulating pipeline, the on-off of the circulating pipeline is controlled according to the temperature at the preset position point, and when the water heater starts to circulate, hot water circulates only a half circle in the circulating pipeline, so that the problem of energy waste caused by heating of water in the circulating pipeline between a water using end and a water inlet of the water heater in the prior art is solved.

Description

Energy-saving control method and system and zero-cold water system of water heater
Technical Field
The invention relates to the technical field of water heaters, in particular to an energy-saving control method and system and a zero-cold-water system of a water heater.
Background
In the prior art, for a water heater with a zero-cold-water function, generally, when the water heater is installed, a service person can find a water tap at the farthest end of a water path in a family, a hot water pipeline and a cold water pipeline are communicated below the water tap, and in addition, in order to prevent cold water from flowing backwards into the hot water pipeline when hot water is used, a one-way valve is installed at the position. Thus, the household pipeline of the user forms a zero cold water preheating circulation pipeline.
The working principle of zero cold water is as follows: when a user is not in the process of using hot water, the water heater starts a self-contained circulating water pump when detecting that the temperature of the water outlet of the water heater is lower than the set temperature, the water in the circulating pipeline flows into the water heater to be heated after the water pump is operated, the water pump stops operating until the water in the whole circulating pipeline is heated, and the water heater also stops burning. Then when the user uses hot water for the first time, the speed of the hot water outlet of the water faucet is extremely high because the pipeline is preheated in advance, so that the function of zero cold water is realized.
The whole section of the circulating pipeline is heated, so that the preheating mode is relatively energy-consuming, particularly, water in the section of the circulating pipeline from the rear end of the one-way valve to the water inlet of the water heater cannot flow out when a user uses hot water, and the section of the hot water flows out when the user uses cold water, so that trouble is caused to the user (when the user uses cold water, the front section of the hot water is arranged), and therefore the water in the section of the circulating pipeline is not required to be preheated. Therefore, a certain device and a certain control mode are needed to ensure that the water heater only preheats the pipeline from the water outlet of the water heater to the endmost faucet when the water heater is preheated, thereby achieving the effect of saving energy.
Disclosure of Invention
The invention aims to overcome the defect of energy waste caused by heating of a circulating pipeline between a water using end and a water inlet of a water heater in the prior art, and provides an energy-saving control method and system and a zero-cold-water system of the water heater.
The invention solves the technical problems through the following technical scheme:
an energy-saving control method is used for a zero-cold water system of a water heater, a circulation pipeline is connected between a water inlet and a water outlet of the water heater, a circulation water pump is arranged on a water inlet pipeline of the water heater, and the energy-saving control method comprises the following steps:
s1, controlling the circulating water pump to operate, controlling a heat exchanger of the water heater to operate, and starting to circularly preheat;
s2, when the water temperature of the preset position point in the circulating pipeline is detected to be more than or equal to a first preset temperature T 1 And then controlling the circulation pipeline to be closed at a preset position point, wherein the preset position point is positioned between a communication position of the circulation pipeline and a cold water interface of a water using end and a communication position of the circulation pipeline and a hot water interface of the water using end.
According to the scheme, a preset position point is arranged on the circulating pipeline, the circulating pipeline is divided into two parts at the preset position point, the on-off of the circulating pipeline is controlled according to the temperature at the preset position point, when the water heater starts to circulate, water heated by a heat exchanger of the water heater flows into the circulating pipeline, the temperature at the preset position point is increased to a first preset temperature from normal temperature, the fact that the heated water just flows to the preset position point of the circulating pipeline is indicated, the circulating pipeline is closed at the moment, the water in the circulating pipeline does not flow any more, namely, the water circulates from the beginning to the end of circulation of the water heater, the water in the circulating pipeline between the water using end and the water inlet of the water heater is still cold water, the problem of energy waste caused by the fact that the water in the circulating pipeline between the water using end and the water inlet of the water heater is heated in the prior art is solved, and no hot water flows out when the water using end uses the cold water.
Preferably, the energy-saving control method further includes the steps of:
and S3, controlling the circulating water pump to stop running, and controlling the heat exchanger of the water heater to stop running.
In this scheme, circulating line is after presetting the closed of position point department, and rivers in the circulating line no longer continue to circulate, need not to heat the water in the circulating line this moment, consequently control circulating water pump and heat exchanger bring to rest, can avoid the energy extravagant.
Preferably, the energy-saving control method further includes the steps of:
and S4, controlling the circulation pipeline to be communicated again at a preset position point after the preset preheating interval time is reached.
In this scheme, after a period of time, the temperature of the hot water in the circulation pipeline can be gradually reduced, and in order to realize the effect of zero cold water, the water in the circulation pipeline needs to be heated again, and the re-communication of the circulation pipeline is controlled through the preset preheating interval time, which is one of control methods for re-communication of the circulation pipeline.
Preferably, the energy-saving control method further includes the steps of:
s4, when the water temperature at the preset position point in the circulating pipeline is detected to be lower than a second preset temperature T 2 When the temperature of the circulating pipeline is higher than the first preset temperature T, controlling the circulating pipeline to be communicated again at a preset position point, wherein the first preset temperature T 1 Greater than a second predetermined temperature T 2 。
In this embodiment, the recirculation line is controlled by temperature, which is another control method for recirculation line recirculation.
Preferably, in the step S3, the control condition for stopping the operation of the circulating water pump is q < q 0 ，
Wherein q is the flow value in the circulation pipeline, q 0 Is a preset flow value.
In the scheme, whether the circulating pipeline is closed at the preset position point or not is judged by detecting the flow, so that the water pump is controlled to stop running, and the method is one control method for stopping running of the circulating water pump.
Preferably, in the step S3, the control condition for stopping the operation of the circulating water pump is that when the closing motion of the circulating pipeline at the preset position point is detected, the operation of the circulating water pump is controlled to stop.
In the scheme, whether the circulating pipeline is closed at a preset position point is judged by detecting whether the circulating pipeline is closed or not, so that the water pump is controlled to stop running, and the method is another control method for stopping running of the circulating water pump.
The invention also provides an energy-saving control system, which is used for the zero-cold water system of the water heater, the zero-cold water system of the water heater comprises a circulating pipeline, and the energy-saving control system comprises:
the temperature detection module is used for detecting the water temperature value at a preset position point in the circulating pipeline, and the preset position point is positioned between the communication position of the circulating pipeline and a cold water interface of a water using end and the communication position of the circulating pipeline and a hot water interface of the water using end;
the circulating pipeline cutting module is used for opening or closing a water flow channel of the circulating pipeline at a preset position point;
the control module is used for controlling the circulation pipeline cutting-off module to close a water flow channel of the circulation pipeline at a preset position point when the water temperature value transmitted by the temperature detection module reaches a first preset water temperature, and controlling the circulation water pump of the water heater and the heat exchanger of the water heater to stop running.
Preferably, the energy-saving control system further comprises a timing module, the timing module is connected with the control module, and the control module controls the circulation pipeline cutting module to be started according to timing data transmitted by the timing module so as to open a water flow channel at a preset position point.
In the scheme, timing is carried out through the timing module, and the re-communication of the circulating pipeline is controlled after the preset time is reached, so that the control method for re-communication of the circulating pipeline is provided.
Preferably, the energy-saving control system further includes a water flow detection module, the water flow detection module is connected to the control module and is configured to detect water flow in the circulation pipeline, and the control module controls the circulation water pump of the water heater and the heat exchanger of the water heater to stop operating according to water flow data transmitted by the water flow detection module.
In the scheme, the water flow in the circulating pipeline is detected through the water flow detection module, and when the detected water flow is smaller than the preset water flow, the closing of the circulating pipeline is indicated, so that the method is one of control methods for stopping the operation of the circulating water pump and the heat exchanger.
Preferably, the water flow detection module is disposed between a preset position point of the circulation pipeline and the water inlet of the water heater.
In the scheme, after the circulating pipeline is closed at the preset position point, the flow of part of water between the preset position point and the water inlet of the water heater in the circulating pipeline is sharply reduced, so that the water flow detection module is arranged in the section, and whether the water flow in the circulating pipeline is reduced or not is detected more accurately.
The invention also provides a zero-cold water system of a water heater, which comprises:
a water heater;
the two ends of the circulating pipeline are respectively connected with a water inlet and a water outlet of the water heater;
the circulating pipeline cutting device is arranged on the circulating pipeline and at least comprises a first part and a second part, the first part is a part of the circulating pipeline between a water outlet of the water heater and the circulating pipeline cutting device, the second part is a part of the circulating pipeline between a water inlet of the water heater and the circulating pipeline cutting device, the circulating pipeline cutting device comprises a temperature sensor and a switch, and the circulating pipeline cutting device can open and close the switch according to the temperature in the circulating pipeline detected by the temperature sensor so as to communicate or cut off the first part and the second part;
and the two ends of the water utilization pipeline are respectively communicated with the first part and the second part of the circulating pipeline.
Preferably, the switch is located on one side of the temperature sensor close to the water inlet of the water heater.
In this scheme, temperature sensor is located the upper reaches of switch spare, can avoid the rivers that are heated to the low reaches of switch spare, has avoided hot water's waste as far as possible.
Preferably, the switch member is a solenoid valve.
In this scheme, adopt the solenoid valve to open and close at predetermined position point department to circulating line, the switching process is simple quick.
Preferably, the circulation pipeline cutting device further comprises a one-way valve, the one-way valve is located on one side, away from the temperature sensor, of the switch piece, and the flow direction of the one-way valve is from the water outlet to the water inlet of the water heater.
In this scheme, the check valve can avoid being located the cold water backward flow of circulating line cutting device low reaches to the water end in the circulating line, causes the problem that the cold water flows out when the water end uses hot water.
Preferably, the circulation pipeline cutting device further comprises a valve body, the temperature sensor and the switch piece are arranged in the valve body, a flow passage is arranged in the valve body and communicated with the circulation pipeline, the flow passage can be opened or closed when the switch piece is opened or closed, and the one-way valve is arranged in the flow passage.
In this scheme, set up the structure of a valve body alone, all install temperature sensor, switch spare in the valve body, the whole installation on circulation line of the circulation line cutting device of being convenient for.
Preferably, a partition plate is further arranged in the valve body, the partition plate divides the flow passage into two parts, the two parts of the flow passage are communicated through a through hole formed in the partition plate, and the through hole can be blocked and exposed by extending and retracting an actuating element of the switch piece.
In the scheme, the on-off of the circulating pipeline can be realized by extending and retracting the actuating element of the switch piece, and the actuating process is simple and quick.
The positive progress effects of the invention are as follows:
the invention sets a preset position point on the circulating pipeline, controls the on-off of the circulating pipeline according to the temperature of the preset position point, when the water heater starts to circulate, the heated water flows into the circulating pipeline, and circulates a half circle only in the circulating pipeline, the upstream of the preset position point is hot water, and the downstream of the preset position point is hot water flowing out when the cold water end is used for boiling hot water, so the problem of energy waste caused by heating the water in the circulating pipeline between the water end and the water inlet of the water heater in the prior art is solved, and no hot water flows out when the water end is used for cold water.
Drawings
Fig. 1 is a schematic structural diagram of a zero-cold water system of a water heater according to embodiment 1 of the present invention.
Fig. 2 is a schematic perspective view of the zero cold water circulation connection valve in fig. 1.
Fig. 3 is an exploded view of the zero cold water circulation connection valve of fig. 2.
Fig. 4 is a sectional view taken along the axial direction of the valve body in fig. 2, with the solenoid valve in a closed state.
Fig. 5 is a sectional view of fig. 2 taken along the axial direction of the valve body with the solenoid valve in an open state.
Fig. 6 is a block diagram of an energy saving control system according to embodiment 2 of the present invention.
Fig. 7 is a block diagram of an energy saving control system according to embodiment 3 of the present invention.
Fig. 8 is a flowchart of an energy saving control method according to embodiment 4 of the present invention.
Description of reference numerals:
example 1:
zero cold water circulation connecting valve 100
Valve body 110
Flow passage 111
Partition 112
Via 1120
Temperature sensor 120
Solenoid valve 130 solenoid valve coil 131 closing cap 132
Return spring 133O-ring 134
Valve core 135 electromagnetic valve controller 136 one-way valve 140
Control assembly 200
Water end 300
Water pipeline 301
Water heater 400
Water inlet 401
Outlet 402
Circulating water pump 403
Heat exchanger 404 tap water pipeline 500 circulation pipeline 600
Example 2:
control module 200 temperature detection module 120 circulation line shut-off module 130 flow detection module 202
Example 3:
timing module 201
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Referring to fig. 1, the present embodiment provides a zero-cooling water system of a water heater, which includes a water heater 400, a circulation pipeline 600, a circulation pipeline cut-off device, and at least one water usage pipeline 301.
The two ends of the circulation pipeline 600 are respectively connected with the water inlet 401 and the water outlet 402 of the water heater 400, and the tap water pipeline 500 is also connected with the water inlet 401 of the water heater 400. The circulation line cut-off device is disposed on the circulation line 600, and divides the circulation line 600 into two parts, the first part is a part of the circulation line 600 located between the water outlet 402 of the water heater 400 and the circulation line cut-off device, and the second part is a part of the circulation line 600 located between the water inlet 401 of the water heater 400 and the circulation line cut-off device. The circulation line cut-off device may open and close the circulation line 600 at this point to communicate or block the first and second portions.
The water usage lines 301 may be one or more, and the hot water connection of each water usage line 301 communicates with a first portion of the circulation line 600, and the cold water connection of each water usage line 301 communicates with a second portion of the circulation line 600. The water using pipe 301 is provided with a water using end 300, and the water using end 300 can be a water outlet component such as a faucet, a shower head and the like.
The circulation pipeline cut-off device comprises a zero cold water circulation connection valve 100, and the structure of the zero cold water circulation connection valve 100 is shown in fig. 2-5, and comprises a valve body 110, and a temperature sensor 120, a switch member and a one-way valve 140 which are arranged in the valve body 110. The valve body 110 is integrally formed as a cylindrical housing structure having both ends opened to facilitate the installation thereof on the circulation line 600, and a flow passage 111 for communicating with the circulation line 600 is formed therein. The temperature sensor 120 extends into the flow passage 111 to detect the temperature of water in the flow passage 111. A partition plate 112 is fixed to an inner wall of the valve body 110 at a middle portion thereof, the partition plate 112 partitions the flow passage 111 into two parts, the temperature sensor 120 and the check valve 140 are respectively located in the two parts, and the temperature sensor 120 is located upstream of the check valve 140. The partition plate 112 includes a first inclined section, a horizontal section and a second inclined section which are connected in sequence, the horizontal section extends along the axial direction of the flow channel 111, the first inclined section and the second inclined section are parallel to each other, and the horizontal section is provided with a through hole 1120 to communicate with two parts of the flow channel 111.
The check valve 140 is located on the side of the switch member away from the temperature sensor 120, and the flow direction of the check valve 140 is from the water outlet 402 to the water inlet 401 of the water heater 400. The check valve 140 can prevent cold water from flowing into hot water when the hot water is boiled at the water using end 300.
The switch member is located on one side of the temperature sensor 120 close to the water inlet 401 of the water heater 400, and the switch member is the electromagnetic valve 130. The solenoid valve 130 includes a solenoid valve coil 131, a solenoid valve controller 136, a spool 135, an O-ring 134, a return spring 133, and a closing cap 132. The solenoid valve coil 131 is installed on the outer surface of the valve body 110, the valve core 135 is installed inside the solenoid valve coil 131 and extends into the valve body 110, and the solenoid valve controller 136 is used for controlling the on-off of the solenoid valve 130, so as to control the extension and retraction of the valve core 135 to block and expose the through hole 1120; the return spring 133 is used for returning the valve core 135, the closing cover 132 is used for closing the return spring 133, and the O-shaped ring 134 is used for sealing between the valve core 135 and the valve body 110, so that water in the valve body 110 is prevented from entering the electromagnetic valve 130.
A flow meter (not shown) is also arranged in the circulating pipeline 600 and used for detecting the water flow in the circulating pipeline 600, and the flow meter is arranged between the zero cold water circulation connecting valve 100 and the water inlet 401 of the water heater 400. Of course, the flow meter may alternatively be positioned above the water inlet 401 of the water heater 400.
The water heater 400 further includes a control assembly 200, the control assembly 200 is electrically connected to the temperature sensor 120, the control assembly 200 is electrically connected to the solenoid valve 130, and the control assembly 200 controls the solenoid valve 130 to open and close according to the temperature value transmitted by the temperature sensor 120.
Example 2
The present embodiment provides an energy saving control system, which includes a temperature detection module 120, a circulation line cut-off module 130, and a control module 200, as shown in fig. 6.
The temperature detecting module 120 is configured to detect a water temperature value at a preset position point in the circulation pipeline 600, where the preset position point is a position of the zero cold water circulation connection valve 100 in embodiment 1, and the temperature detecting module 120 is the temperature sensor 120 in embodiment 1.
The circulation line cutoff module 130 is used to open or close the water flow path of the circulation line 600 at a predetermined position point, and the circulation line cutoff module 130 is the solenoid valve 130 in embodiment 1.
The control module 200 is respectively connected with the temperature detection module 120, the circulation pipeline cutting module 130, the water circulation pump 403 of the water heater 400 and the heat exchanger 404 of the water heater 400. When the water temperature value transmitted by the temperature detection module 120 is greater than or equal to the first preset water temperature T 1 When the control module 200 controls the circulation pipeline cutting module 130 to be closed; when the water temperature value transmitted by the temperature detection module 120 is less than the second preset water temperature T 2 At this time, the control module 200 controls the circulation line cutoff module 130 to be turned on. The control module 200 is the control assembly 200 of embodiment 1.
The energy-saving control system of this embodiment further includes a flow rate detection module 202, where the flow rate detection module 202 is the flow meter in embodiment 1, and the flow rate detection module202 are arranged between a preset position point of the circulation pipeline 600 and the water inlet 401 of the water heater 400 for detecting water flow in the circulation pipeline 600, the flow detection module 202 is electrically connected with the control module 200, and when the water flow q detected by the flow detection module 202 is smaller than a preset flow value q 0 At this time, the control module 200 controls the circulating water pump 403 of the water heater 400 and the heat exchanger 404 of the water heater 400 to stop operating.
Example 3
The present embodiment is a further improvement on the basis of embodiment 2, and as shown in fig. 7, the energy saving control system of the present embodiment further includes a timing module 201, the timing module 201 is integrated on the control module 200, and the timing module 201 is a timer. The condition that the control module 200 controls the circulation line cut-off module 130 to be turned on is that the control module 200 controls the circulation line cut-off module 130 to be turned on according to the timing data transmitted by the timing module so as to open the water flow channel at the preset position point.
The present embodiment provides another implementation manner for restarting the circulation line cut-off module 130, and the restart of the circulation line cut-off module 130 is controlled by timing.
Example 4
The embodiment provides an energy-saving control method, which is used in the zero-cold water system of the water heater in embodiment 1, and as shown in fig. 8, the energy-saving control method in the embodiment includes the following steps:
s1, when the water heater 400 has a circulation demand, the control assembly 200 controls the circulating water pump 403 to operate, controls the heat exchanger 404 of the water heater 400 to operate, and starts circulation preheating.
S2, the temperature sensor 120 continuously detects the water temperature T, and if T is larger than or equal to T 1 The control assembly 200 controls the solenoid valve 130 to close.
S3, continuously detecting the flow value q in the circulating pipeline by the flowmeter, and if q is less than q 0 The control assembly 200 controls the circulating water pump 403 to stop running and controls the heat exchanger 404 of the water heater 400 to stop running.
S4, if T is less than T 2 The control assembly 200 controls the solenoid valve 130 to open.
And S5, repeating the steps.
Wherein, in step S2, T 1 Is a first preset temperature value.
In step S3, q 0 For a predetermined flow value, q 0 Set to 1L/min.
In step S4, T 2 Is a second predetermined temperature value, and T 2 ＜T 1 。
In other embodiments, step S3 may be replaced by: when the closing action of the electromagnetic valve 130 is detected, the control assembly 200 controls the circulating water pump 403 to stop running and controls the heat exchanger 404 of the water heater 400 to stop running. The principle of detecting whether the solenoid valve 130 has a closing action can be based on infrared or laser distance measurement, an infrared/laser emitter and an infrared/laser receiver are respectively arranged on the opposite surfaces of the valve core 135 and the closing cap 132, and the infrared/laser receiver is electrically connected with the control assembly 200, and the extension and retraction of the valve core 135 are determined by the difference of the distance between the valve core 135 and the closing cap 132 when the valve core 135 of the solenoid valve 130 is in the extension and retraction state.
In other embodiments, step S4 may be replaced by: when the timer counts the preset preheating interval time, the control assembly 200 controls the electromagnetic valve 130 to open, and the preheating interval time is set to 10 seconds.
In this embodiment, the temperature sensor 120 is used to detect the temperature of water at a predetermined position in the circulation pipeline 600, which is the position of the zero-cycle cold water connection valve 100 in embodiment 1. The temperature sensor 120 is provided inside the zero cold water circulation connection valve 100. It is conceivable that the temperature sensor 120 may not be provided inside the zero-cooling water circulation connection valve 100, or other alternative structures may be adopted as long as a structure capable of detecting the water temperature value of the circulation line 600 at the preset position point is provided at the preset position point, and the structure and the installation position of the temperature sensor 120 in the present embodiment are not limited.
In this embodiment, the electromagnetic valve 130 is used to open or close the water flow passage of the circulation pipeline 600 at a predetermined position, and the electromagnetic valve 130 is disposed on the zero cold water circulation connection valve 100. It is contemplated that the solenoid valve 130 may not be provided on the zero cold water circulation connection valve 100, or other alternative structures may be employed as long as a structure capable of opening or closing the water flow passage of the circulation line 600 at the preset position point is provided at the preset position point, without being limited to the structure and installation position of the solenoid valve 130 in the present embodiment.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The above-described apparatus embodiments are merely illustrative. Each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It should be noted that the embodiment is only an example of the energy-saving control method and the control system of the invention by a gas water heater. According to actual needs, the gas water heater in the embodiment can be replaced by an electric heating water heater or a solar water heater or a water heater device adopting other heating modes.

Claims (16)

1. An energy-saving control method is used for a zero-cold water system of a water heater, a circulating pipeline is connected between a water inlet and a water outlet of the water heater, and a circulating water pump is arranged on a water inlet pipeline of the water heater, and is characterized by comprising the following steps:
s1, controlling the circulating water pump to operate, controlling a heat exchanger of the water heater to operate, and starting to circularly preheat;
s2, when the water temperature of the preset position point in the circulating pipeline is detected to be more than or equal to a first preset temperature T 1 And then controlling the circulation pipeline to be closed at a preset position point, wherein the preset position point is positioned at the communication part of the circulation pipeline and a cold water interface of a water using end and the circulation pipelineThe circulating pipeline is communicated with a hot water interface at the water using end.
2. The energy saving control method according to claim 1, characterized by further comprising the steps of:
and S3, controlling the circulating water pump to stop running, and controlling the heat exchanger of the water heater to stop running.
3. The energy saving control method according to claim 2, characterized by further comprising the steps of:
and S4, controlling the circulation pipeline to be communicated again at a preset position point after the preset preheating interval time is reached.
4. The energy saving control method according to claim 2, characterized by further comprising the steps of:
s4, when the water temperature at the preset position point in the circulating pipeline is detected to be lower than a second preset temperature T 2 When the temperature of the circulating pipeline is higher than the first preset temperature T, controlling the circulating pipeline to be communicated again at a preset position point, wherein the first preset temperature T 1 Greater than a second predetermined temperature T 2 。
5. The energy-saving control method according to claim 2, wherein in the step S3, the control condition for stopping the operation of the circulating water pump is q < q 0 ，
Wherein q is the flow value in the circulation pipeline, q 0 Is a preset flow value.
6. The energy-saving control method according to claim 2, wherein in the step S3, the control condition for stopping the operation of the circulating water pump is that the circulating water pump is controlled to stop the operation when a closing motion of the circulating line at a preset position point is detected.
7. An energy saving control system for a zero cold water system of a water heater, the zero cold water system of the water heater including a circulation line, the energy saving control system comprising:
the temperature detection module is used for detecting the water temperature value at a preset position point in the circulating pipeline, and the preset position point is positioned between the communication position of the circulating pipeline and a cold water interface of a water using end and the communication position of the circulating pipeline and a hot water interface of the water using end;
the circulating pipeline cutting module is used for opening or closing a water flow channel of the circulating pipeline at a preset position point;
the control module is used for controlling the circulation pipeline cutting-off module to close a water flow channel of the circulation pipeline at a preset position point when the water temperature value transmitted by the temperature detection module reaches a first preset water temperature, and controlling the circulation water pump of the water heater and the heat exchanger of the water heater to stop running.
8. The energy-saving control system of claim 7, further comprising a timing module, wherein the timing module is connected to the control module, and the control module controls the circulation line cut-off module to be opened according to timing data transmitted by the timing module, so that a water flow channel at a preset position point is opened.
9. The energy-saving control system as claimed in claim 7 or 8, further comprising a water flow detection module connected to the control module for detecting water flow in the circulation pipeline, wherein the control module controls the circulation water pump of the water heater and the heat exchanger of the water heater to stop operating according to the water flow data transmitted by the water flow detection module.
10. The energy saving control system of claim 9, wherein the water flow detection module is disposed between a preset position point of the circulation line and the water inlet of the water heater.
11. A zero-cold water system for a water heater, comprising:
a water heater;
the two ends of the circulating pipeline are respectively connected with a water inlet and a water outlet of the water heater;
the circulating pipeline cutting device is arranged on the circulating pipeline and at least comprises a first part and a second part, the first part is a part of the circulating pipeline between a water outlet of the water heater and the circulating pipeline cutting device, the second part is a part of the circulating pipeline between a water inlet of the water heater and the circulating pipeline cutting device, the circulating pipeline cutting device comprises a temperature sensor and a switch, and the circulating pipeline cutting device can open and close the switch according to the temperature in the circulating pipeline detected by the temperature sensor so as to communicate or cut off the first part and the second part;
and the two ends of the water utilization pipeline are respectively communicated with the first part and the second part of the circulating pipeline.
12. The water heater zero-cold water system as claimed in claim 11, wherein said switch member is located on a side of said temperature sensor adjacent to a water inlet of said water heater.
13. The zero-cold water system of a water heater as claimed in claim 11 or 12, wherein said switch member is a solenoid valve.
14. The zero-cold water system of the water heater as claimed in claim 11 or 12, wherein the circulation line cut-off device further comprises a check valve, the check valve is positioned at the side of the switch member away from the temperature sensor, and the flow direction of the check valve is from the water outlet to the water inlet of the water heater.
15. The zero-cold water system of the water heater according to claim 14, wherein the circulation pipeline cut-off device further comprises a valve body, the temperature sensor and the switch element are both disposed in the valve body, a flow passage is disposed in the valve body, the flow passage communicates with the circulation pipeline, the switch element can open or close the flow passage when opened or closed, and the check valve is disposed in the flow passage.
16. The zero cold water system of the water heater according to claim 15, wherein a partition is further provided in the valve body, the partition divides the flow passage into two parts, the two parts of the flow passage are communicated with each other through a through hole provided in the partition, and the through hole can be blocked and exposed by extending and retracting an actuator of the switch member.
CN202211522295.XA 2022-11-30 2022-11-30 Energy-saving control method and system and zero-cold water system of water heater Pending CN115930454A (en)

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CN202211522295.XA CN115930454A (en) 2022-11-30 2022-11-30 Energy-saving control method and system and zero-cold water system of water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211522295.XA CN115930454A (en) 2022-11-30 2022-11-30 Energy-saving control method and system and zero-cold water system of water heater

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CN115930454A true CN115930454A (en) 2023-04-07

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Family Applications (1)

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