CN108458487B - Intelligent hot water circulation device and system and control method thereof - Google Patents
Intelligent hot water circulation device and system and control method thereof Download PDFInfo
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- CN108458487B CN108458487B CN201810364572.6A CN201810364572A CN108458487B CN 108458487 B CN108458487 B CN 108458487B CN 201810364572 A CN201810364572 A CN 201810364572A CN 108458487 B CN108458487 B CN 108458487B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention relates to a hot water circulating device which comprises a water tank, a cold water inlet, a circulating outlet, a circulating inlet, a circulating water return port and a hot water outlet, wherein the water tank is arranged in the hot water circulating device; the water tank is provided with a hot water port, a water outlet, a circulating cold water port and an electric heating device; the cold water source is connected with the circulating cold water port through a cold water inlet, one of the three-way connectors and the first connector of the two electric three-way valves, the second connector of the electric three-way valves and the third connector of the three-way valves are connected with the circulating water return port through a circulating pump; the third port of the electric three-way valve is connected with the low-temperature inlet through the circulating outlet, the hot water port is connected with the high-temperature outlet through the circulating inlet, the water outlet is connected with a water point through a hot water pipe after passing through the hot water outlet, and the hot water pipe adjacent to the water point is branched out to form a water return pipe connected with the circulating water return port. The invention ensures instant heating and constant temperature comfortable hot water, and effectively avoids frequent start and stop of the machine and interruption of heating caused by short-time water discharge.
Description
Technical Field
The invention relates to a hot water system, in particular to an instant heating hot water circulating device and system, and simultaneously provides a control method, belonging to the technical field of water heaters.
Background
With the improvement of life quality, the use requirement of users on household hot water is no longer satisfied with pure hot water supply, and the requirements of instant heating, large flow and constant temperature comfort are gradually pursued. The conventional gas water heater and its home decoration mode do not take this development transformation into consideration, so that a user has to discharge cold water in the pipeline when using hot water, and as a result, the following results: 1) Hot water cannot be obtained in time, and waiting is needed; 2) The discharged cold water is wasted; 3) The water temperature is easy to fluctuate, and the comfort level is low; 4) The gas engine is frequently started due to a small amount of water, so that not only is the running noise generated, but also the service life is influenced; 5) When a plurality of water consumption points are used simultaneously, the water consumption is insufficient or the water temperature is low.
In order to solve the problems in the prior art, the engineering implementation instant heating at present mainly adopts the following two methods: firstly, a hot water buffering method is to install a heat preservation water tank below a basin and the like, cold water enters the water tank to be mixed with high-temperature water for buffering and then is used by a user, the method needs a large-volume water tank when a pipeline is long, the installation space is limited, and the heat preservation water tank is installed at facilities such as each basin to ensure that corresponding taps are opened and heated, so that frequent starting and stopping of a gas engine cannot be avoided; and secondly, the circulating heating method is to send residual cold water in the hot water pipe to the water heater by means of a pump for heating and then to be supplied to a user for use, and the method can not solve the problems of sudden heating and sudden start and stop of the gas engine.
The Chinese patent document with the application number of 201320058861.6 discloses a central water heating system, which comprises a heating source, a water storage tank, a central controller, a heating probe positioned in the water storage tank, a magnesium rod and a cold water inlet pipe for providing a water source for the central water heating system; the heating source is connected with the cold water outlet and the hot water inlet of the water storage tank through the heating pipeline to form a heating loop; the water storage tank is connected with a circulating pipeline through a hot water outlet and a circulating water return port to form a water supply/return loop; the cold water inlet pipe is provided with a first three-way valve, the other two ports of the three-way valve are respectively connected with the cold water inlet of the water storage tank and the bypass pipe of the water heater, and the bypass pipe of the water heater is connected with the heating pipeline through a second three-way valve. Because the water storage tank is arranged between the gas water heater and the water using terminal, when a small amount of hot water is used, the water heater does not need to be started to heat, the hot water is provided by the water storage tank, and the instant heating power pressure of the water heater is reduced. The circulating water pump can preheat the cold water from the water storage tank to the water using terminal, and the water using terminal can be heated immediately after being opened, so that the waste of water resources is reduced. When a large amount of hot water is used, cold water enters the gas water heater through the hot water bypass pipeline and then enters the water storage tank after being heated. Although the technical scheme can theoretically alleviate the problem of water temperature fluctuation during instant heating, the following problems exist during implementation: 1) The water tank circulation heating pipeline and the hot water circulation pipeline are mutually independent, so that two sets of pump circulation pipelines are needed, the structure is complex, the cost is high, and the water tank circulation heating pipeline and the hot water circulation pipeline are not suitable for being modified on the basis of the original structure; 2) The water tank is used as a circulating heat source, the length of the circulating pipe is limited by the volume of the water tank, when the volume design of the water tank is smaller, the once circulation cannot meet the requirement of circulating heating of the pipeline, the pipeline can be heated again after the water tank is heated, the circulating period is longer, and the installation space is larger if the design capacity of the water tank is larger.
Disclosure of Invention
Aiming at the problems existing in the prior art, the intelligent hot water circulation device and system suitable for various house types and hot water pipe lengths are provided, not only can realize instant heating and constant-temperature comfortable hot water at all water points, but also can prevent frequent starting of a machine for heating and breaking heating when water is discharged for a short time, and a control method thereof is provided.
In order to achieve the above purpose, the hot water circulating device of the invention comprises a water tank and is provided with a cold water inlet, a circulating outlet, a circulating inlet, a circulating water return port and a hot water outlet; the water tank is provided with a hot water port, a water outlet, a circulating cold water port and an electric heating device; the cold water source is connected with the first port of the electric three-way valve through one of the cold water inlets and two ports, the second port of the electric three-way valve is connected with the circulating cold water port, and the third port of the three-way valve is connected with the circulating water return port through the circulating pump; the third port of the electric three-way valve is connected with a low-temperature inlet through a circulating outlet, the hot water port is connected with a high-temperature outlet through the circulating inlet, the water outlet is connected with a water consumption point through a hot water pipe after passing through the hot water outlet, and a hot water pipe adjacent to the water consumption point is branched out to form a water return pipe connected with the circulating water return port.
The hot water circulation system comprises a heating and hot water dual-purpose gas furnace and a hot water circulation device, wherein the dual-purpose gas furnace is provided with a heating outlet and a heating return port, a low-temperature inlet and a high-temperature outlet which form heating circulation with a heating pipeline; the water tank is provided with a hot water port, a water outlet, a circulating cold water port and an electric heating device, and the hot water circulating device is provided with a cold water inlet, a circulating outlet, a circulating inlet, a circulating water return port and a hot water outlet; the cold water source is connected with the first port of the electric three-way valve through one of the cold water inlets and two ports, the second port of the electric three-way valve is connected with the circulating cold water port, and the third port of the three-way valve is connected with the circulating water return port through the circulating pump; the third port of the electric three-way valve is connected with a low-temperature inlet through a circulating outlet, the hot water port is connected with a high-temperature outlet through the circulating inlet, the water outlet is connected with a water consumption point through a hot water pipe after passing through the hot water outlet, and a hot water pipe adjacent to the water consumption point is branched out to form a water return pipe connected with the circulating water return port.
Therefore, the electric three-way valve can provide comfortable hot water which is heated immediately and has constant water temperature for each water point by properly controlling the switching of the passage and the starting and stopping of the circulating pump, and the water tank and the water pipe heating circulation can be realized rapidly due to the fact that the whole system only needs one circulating pump and the pipeline has a simple structure and is not influenced by the length of a household connecting pipeline.
The system of the invention is further perfected as follows: the cold water source is connected with one of the three-way connectors after passing through a cold water inlet and a flow sensor (FL), the circulating water return port is connected with the circulating pump through a pipeline temperature sensor (T1) and a one-way valve, and a water tank temperature sensor (T2) is arranged on the water tank; the signal output ends of the water tank temperature sensor, the pipeline temperature sensor and the flow sensor are connected with the corresponding signal input ends of the intelligent control device in the control circuit, and the corresponding control output ends of the intelligent control device are respectively connected with the electric three-way valve, the circulating pump and the controlled end of the electric heating device.
This allows intelligent control, such as the preferred: when a user discharges a small amount of water, the first and second interfaces of the electric three-way valve are controlled to be conducted, so that cold water enters the water tank from the three-way valve to the electric three-way valve to the circulating cold water port, and hot water is supplied to the water consumption point through the hot water pipe after passing through the hot water outlet from the water tank water outlet; when a large amount of water is used by a user, the first and third interfaces of the electric three-way valve are controlled to be conducted, so that cold water can be supplied to the user through the water point of the hot water pipe after passing through the water outlet of the water tank and the hot water outlet through the three-way valve, the circulating outlet, the low-temperature inlet, the cold water is heated into hot water by the wall-mounted furnace, the high-temperature outlet, the circulating inlet, the hot water port and the water tank. When the user does not discharge water, the water tank electric heating can be selected as a heat source circulation heating pipeline to form a water pipe heating circulation pipeline of a water tank water outlet through a hot water outlet, a hot water pipe, a branched water return pipe, a circulation water return port, a circulation pump, a three-way valve, an electric three-way valve and a water tank circulation water cooling port; or the heating and hot water dual-purpose gas furnace is used as a heat source circulation heating pipeline to form a circulation loop of which the water outlet of the water tank passes through a hot water outlet, a hot water pipe, a branched water return pipe, a circulation water return port, a circulation pump, a tee joint, an electric three-way valve, a circulation outlet, a low-temperature inlet, cold water heated by the wall-hanging furnace into hot water, a high-temperature outlet, a circulation inlet, a hot water port, and a water inlet into the water tank and the water pipe. As a result, all water points can be heated immediately to obtain constant-temperature comfortable hot water, and the short-time water discharge can not frequently start the machine to heat and prevent heating.
In actual operation, the basic control of the intelligent control device is carried out according to the following steps:
the method comprises the steps of firstly, receiving detection signals of a water tank temperature sensor, a pipeline temperature sensor and a flow sensor;
step two, judging whether the instantaneous flow signal of the flow sensor is smaller than a set value, if so, judging that the flow sensor is static, and performing an eighth step; if the water is judged to be not dynamically drained, the next step is carried out;
thirdly, judging whether the total flow of the water discharged at the initial preset time interval is larger than a set value, or whether the falling rate of a temperature signal detected by a water tank temperature sensor is larger than a preset rate, or whether the temperature signal detected by the water tank temperature sensor is lower than the set value; if the judgment result is yes, judging that a large amount of water is used, and entering a fifth step; if the judgment result is that the water is not used, the water is used in a small amount, and the next step is carried out;
the fourth step, the first interface and the second interface of the electric three-way valve are communicated, a cold water source enters the water tank through the first interface and the second interface of the three-way valve, the first interface and the second interface of the electric three-way valve and the circulating cold water port, and hot water is supplied to a water consumption point through a hot water pipe after passing through a hot water outlet from a water outlet of the water tank, and then the sixth step is carried out;
fifthly, the first interface and the third interface of the electric three-way valve are conducted; then the next step is carried out;
a sixth step of judging whether the instantaneous flow signal transmitted by the flow sensor is smaller than a set value, if so, returning to the third step; if yes, carrying out the next step;
seventh, the first interface and the second interface of the electric three-way valve are conducted, and the first step is returned;
eighth, judging that the main heat source of the selected circulating heating pipeline is an electric heating or heating water dual-purpose gas furnace, and when the main heat source is judged to be electric heating, firstly and then controlling the heating of the water tank and the circulating heating of the pipeline; when the main heat source is judged to be a heating and hot water dual-purpose gas furnace, the pipeline is directly controlled to circularly heat; after which the first step is returned.
The invention is further perfected in that the flow sensor is monitored in real time in the control process after the static state is judged, and when the instantaneous flow signal is larger than the set value, the flow sensor is switched to a dynamic water discharge control step.
The invention is further perfected as follows: the preferred steps of heating the water tank and circulating heating the pipeline firstly and then are as follows:
step one, judging whether a temperature signal detected by a water tank temperature sensor is lower than a set value, if so, carrying out step five; if the judgment is that the next step is carried out;
step two, starting the water tank electric heating device, and then carrying out the next step;
step three, judging whether the temperature signal detected by the water tank temperature sensor is higher than the sum of the set value and the first preset value, if so, returning to the previous step; if yes, carrying out the next step;
turning off the electric heating device, and then performing the next step;
step five, judging whether the temperature signal detected by the pipeline temperature sensor is lower than a set value, if so, returning to the step one; if yes, carrying out the next step;
step six, the first interface and the second interface of the electric three-way valve are conducted, and the circulating pump is started; then the next step is carried out;
step seven, judging whether the temperature signal detected by the water tank temperature sensor is lower than a set value, and if so, performing step nine; if the judgment is that the step is not finished, the next step is carried out;
step eight, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the step six; if yes, performing step eleventh;
step nine, the first interface and the third interface of the electric three-way valve are conducted; then the next step is carried out;
step ten, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the previous step; if yes, the next step is carried out;
and step eleven, closing the circulating pump, conducting the first interface and the second interface of the electric three-way valve, and returning to the step one.
The invention is further perfected that the preferred steps of directly controlling the pipeline to circularly heat are as follows:
step one, judging whether a temperature signal detected by a pipeline temperature sensor is lower than a set value or not, if so, returning to the step one; if yes, carrying out the next step;
step two, the first and third interfaces of the electric three-way valve are conducted, and the circulating pump is started; then the next step is carried out;
step three, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the previous step; if the judgment is that the next step is carried out;
and step four, closing the circulating pump, conducting the first and second interfaces of the electric three-way valve, and returning to the step one. When the intelligent control device judges that a small amount of hot water is required by a user in the water discharging process, the intelligent control device controls the cold water to be fully introduced into the water tank, and the hot water in the water tank is directly supplied to the user, so that the gas dual-purpose gas furnace is prevented from being frequently started; when the user needs a large amount of hot water, controlling the cold water to be fed into the gas dual-purpose gas furnace for heating and then to enter the water tank for the user to use, so as to meet the continuous constant-temperature hot water requirement; therefore, when the instant heating and constant-temperature comfortable hot water are ensured, the frequent start and stop of the machine and the interruption of heating caused by short-time water discharge are effectively avoided. In addition, the user can select to use the hanging stove as the main heat source or use the electric heat to carry out pipeline circulation heating as the main heat source according to different demands. When the electric heating is used as a main heat source to heat the circulating pipeline, the electric heating of the water tank can meet the pipeline circulating requirement when the pipeline is shorter; when the longer pipeline of the pipeline is not completed and the temperature of the water tank is reduced to the set temperature, the heating and hot water dual-purpose gas furnace is used as a main heat source for heating, so that the circulating heating requirements of different house types and different pipe lengths are reasonably met.
Preferably: the temperature signal detected by the temperature sensor is reduced by 2-3 ℃ at a rate of 30-45 s, the first preset value range is 5-10 ℃, and the second preset value range is 3-5 ℃.
Drawings
FIG. 1 is a schematic diagram of the system configuration of one embodiment of the present invention.
Fig. 2 is a flow chart of the basic control process of the embodiment of fig. 1.
FIG. 3 is a flow chart of direct control line cyclic heating of the embodiment of FIG. 1.
Fig. 4 is a flow chart of the tank heating and line circulation heating control of the embodiment of fig. 1.
Fig. 5 is a schematic diagram of the control circuit of the embodiment of fig. 1.
Detailed Description
The intelligent hot water circulation system of the embodiment is shown in fig. 1, and comprises a wall-mounted heating and hot water dual-purpose gas furnace A (wall-mounted furnace for short) and a hot water circulation device R (the hot water circulation device not only can be matched with the wall-mounted furnace for use, but also can be matched with a gas water heater for use, and can also meet the requirements of instant heating and comfortable constant-temperature hot water supply.
The wall-hanging stove A is provided with a heating outlet and a heating return opening which form heating circulation with a heating pipeline G, and a low-temperature inlet A-1 and a high-temperature outlet A-2.
The hot water circulation device R contains a water tank 1 and has a cold water inlet 6, a circulation outlet 7, a circulation inlet 8, a circulation return water opening 9 and a hot water outlet 10. The water tank is provided with a hot water port 1-1, a water outlet 1-2, a circulating cold water port 1-3 with the functions of a circulating water return port and a cold water inlet and an electric heating device h. The cold water source is connected with a first connector 3-A of an electric three-way valve through a cold water inlet 6 and a flow sensor FL and then through one 4-1 and two 4-2 of three-way connectors, a second connector 3-B of the electric three-way valve is connected with a circulating cold water port 1-3, and three 4-3 of three-way connectors are connected with a circulating water return port 9 through a circulating pump 5; the third port 3-C of the electric three-way valve is connected with the low temperature inlet A-1 through the circulating outlet 7, the hot water port 1-1 is connected with the high temperature outlet A-2 through the circulating inlet 8, the water outlet 1-2 is connected with the water consumption point through the hot water pipe H after passing through the hot water outlet 10, and the hot water pipe adjacent to the water consumption point branches to form a water return pipe F connected with the circulating water return port 9.
And, the circulating water return port 9 is connected with the circulating pump 5 after passing through the temperature sensor T1 and the one-way valve (in practice, the one-way valve can be positioned at any position of the hot water pipe H and the circulating pipeline F), thereby ensuring that the water flow direction of the hot water pipe and the water return pipe is consistent with the forward circulation of the circulating pump. The water tank 1 is provided with a water tank temperature sensor T2.
The control circuit of this embodiment is shown in fig. 5, and includes a control module composed of an intelligent device, namely a chip D1, a temperature detection module externally connected with temperature sensors T1 and T2 and a flow sensor FL, a controlled module of a circulation pump, an electric heating device and an electric three-way valve, a power module and a display panel communication module. The signal output ends of the water tank temperature sensor T2, the pipeline temperature sensor T1 and the flow sensor FL are connected with the signal input end of an intelligent device D1 in the control circuit, and the control output end of the intelligent device is respectively connected with the circulating pump 5 and the controlled ends of the electric heating device and the electric three-way valve. In view of the specific connection of the control circuit schematic and the signal transmission relationships, etc., it is easy to understand the prior art and the technical solutions, and therefore, detailed description thereof will not be given. When the electric three-way valve is controlled to be in a state that the connector 3-A is communicated with the connector 3-B, a pipeline heating cycle taking the water tank as a heat source for the water tank circulation cold water port is formed by the water tank water outlet 1-2 through the hot water outlet 10, the hot water pipe H, the branched water return pipe F, the circulation water return port 9, the circulation pump 5, 4-3 to 4-2 of the three-way connector, the electric three-way valve connector 3-A to the connector 3-B. When the electric three-way valve is controlled to be in a state that the connector 3-A is communicated with the connector 3-C, a circulation loop is formed, wherein the water outlet 1-2 of the water tank is communicated with the connector 3-C through the hot water outlet 10, the hot water pipe H, the branched water return pipe F, the circulation water return port 9, the circulation pump 5, 4-3 to 4-2 of the three-way connector, the electric three-way valve connector 3-A to the connector 3-C, the circulation outlet 7, the low temperature inlet A-1, the cold water is heated into hot water by the hanging stove, the high temperature outlet A-2, the circulation inlet 8, the hot water port 1-1, and the water tank 1 is fed into the water tank, and the hanging stove is used as a heat source to heat the water tank and the water pipe simultaneously.
In operation, the basic control of the intelligent control device is as shown in fig. 2, and the steps are as follows:
the method comprises the steps of firstly, receiving detection signals of a water tank temperature sensor, a pipeline temperature sensor and a flow sensor;
step two, judging whether the instantaneous flow signal FL of the flow sensor is smaller than a set value FLs, if so, judging that the flow signal FL is static, and carrying out an eighth step; if the water is judged to be the dynamic water, the next step is carried out; if the user turns on water in the whole static logic process, namely the instantaneous flow signal of the sensor is larger than a set value, the static state is switched to the dynamic water-on logic;
thirdly, judging whether the total flow AFL of the initial preset time interval of water discharge is larger than a set value AFLs or whether the falling rate of a temperature signal T2 detected by a water tank temperature sensor is larger than a preset rate 45s temperature falling by 2 ℃ or whether the temperature signal T2 detected by the water tank temperature sensor is lower than a set value T2s; if the judgment result is yes, judging that a large amount of water is used, and entering a fifth step; if the judgment result is that the water is not used, the water is used in a small amount, and the next step is carried out;
the fourth step, the first interface 3-A and the second interface 3-B of the electric three-way valve are conducted, the cold water source enters the water tank 1 through one of the three-way interfaces 4-1 and the second interface 4-2, the first interface and the second interface of the electric three-way valve and the circulating cold water port 1-3, the hot water is supplied to the water using point through the hot water pipe H after passing through the hot water outlet 10 from the water outlet 1-2 of the water tank 1, and then the sixth step is carried out;
step five, the first interface 3-A and the third interface 3-C of the electric three-way valve are communicated, cold water is heated into hot water by the wall hanging stove, the high temperature outlet A-2, the circulating inlet 8, the hot water port 1-1 and enters the water tank 1 through the hot water outlet 10, hot water is supplied to a water consumption point through the hot water pipe H after passing through the hot water outlet 10, and a channel is formed in which cold water source is introduced into the wall hanging stove for heating and then is introduced into the water tank for supplying hot water to the water consumption point; then the next step is carried out;
a sixth step of judging whether the instantaneous flow signal FL transmitted by the flow sensor is smaller than a set value FLs, if so, returning to the third step; if yes, carrying out the next step;
seventh, the first interface 3-A and the second interface 3-B of the electric three-way valve are conducted, and the first step is returned;
eighth, judging that the main heat source of the selected circulating heating pipeline is an electric heating or heating water dual-purpose gas furnace, and when the main heat source is judged to be electric heating, firstly and then controlling the heating of the water tank and the circulating heating of the pipeline; when the main heat source is judged to be a heating and hot water dual-purpose gas furnace, the pipeline is directly controlled to circularly heat; after which the first step is returned.
The specific steps of the first and second control water tank heating and pipeline circulation heating in this embodiment are shown in fig. 4:
step one, judging whether a temperature signal T2 detected by a water tank temperature sensor is lower than a set value T2s or not, if so, performing step five (controlling to perform pipeline circulation heating); if the judgment is that the next step is carried out;
step two, starting an electric heating device of the water tank, and then performing the next step;
step three, judging whether a temperature signal T2 detected by a water tank temperature sensor is higher than the sum of a set value T2s and a first preset value 5 ℃, if so, returning to the previous step; if yes, carrying out the next step;
turning off the electric heating device, and then performing the next step;
step five, judging whether the temperature signal detected by the pipeline temperature sensor is lower than a set value, if so, returning to the step one; if yes, carrying out the next step;
step six, the first connector 3-A and the second connector 3-B of the electric three-way valve are communicated, the circulating pump 5 is started, and a water pipe heating circulation pipeline of the water tank water outlet 1-2 through the hot water outlet 10, the hot water pipe H, the branched water return pipe F, the circulating water return port 9, the circulating pump 5, the three 4-3 and the two 4-3 of the three-way connectors, the first connector 3-A and the second connector 3-B of the electric three-way valve and the water tank circulating water cooling port 1-3 is formed; then the next step is carried out;
step seven, judging whether a temperature signal T2 detected by a water tank temperature sensor is lower than a set value T2s, and if so, carrying out step nine; if the judgment is that the step is not finished, the next step is carried out;
step eight, judging whether the temperature signal T1 detected by the pipeline temperature sensor is higher than the sum of the set value T1s and the second preset value 3 ℃, if so, returning to the step six; if yes, performing step eleventh;
step nine, the first connector 3-A and the third connector 3-C of the electric three-way valve are communicated to form a circulation loop which is formed by a water outlet 1-2 of the water tank, a hot water outlet 10, a hot water pipe H, a branched water return pipe F, a circulation water return port 9, a circulation pump 5, three 4-3 of three-way connectors and two 4-2 of the two connectors, the first connector 3-A and the third connector 3-C of the electric three-way valve, a circulation outlet 7, a low-temperature inlet A-1, cold water heating by a hanging stove, a high-temperature outlet A-2, a circulation inlet 8, a hot water port 1-1 and entering the water tank, and the hanging stove is used as a heat source to heat the water in the water tank and the water pipe simultaneously; then the next step is carried out;
step ten, judging whether the temperature signal T1 detected by the pipeline temperature sensor is higher than the sum of the set value T1s and the second preset value 3 ℃, if so, returning to the previous step; if yes, the next step is carried out;
and step eleven, closing the circulating pump, conducting the first interface 3-A and the second interface 3-B of the electric three-way valve, and returning to the step one.
In this embodiment, the direct control pipeline circulation heating is as shown in fig. 3, and the specific process is as follows:
step one, judging whether a temperature signal T1 detected by a pipeline temperature sensor is lower than a set value T1s or not, if so, returning to the step one; if yes, carrying out the next step;
step two, the first interface 3-A and the third interface 3-C of the electric three-way valve are conducted, the circulating pump is started, a circulating loop is formed, wherein the water outlet 1-2 of the water tank enters the water tank through a hot water outlet 10, a hot water pipe H, a branched water return pipe F, a circulating water return port 9, a circulating pump 5, three 4-3 of the three-way interfaces and two 4-2 of the interfaces, the first interface and the third interface of the electric three-way valve, a circulating outlet 7, a low-temperature inlet A-1, cold water is heated into hot water by a hanging stove, a high-temperature outlet A-2, a circulating inlet 8, a hot water port 1-1 and enters the water tank, and the hanging stove is used as a heat source to heat the water tank and the water pipe simultaneously; then the next step is carried out;
step three, judging whether a temperature signal T1 detected by a pipeline temperature sensor is higher than the sum of a set value T1s and a second preset value 3 ℃, if so, returning to the previous step; if the judgment is that the next step is carried out;
and step four, closing the circulating pump, conducting the first interface 3-A and the second interface 3-B of the electric three-way valve, and returning to the step one.
Of course, the first and second control of the tank heating and the line circulation heating, and the direct control of the line circulation heating are not limited to the above-described intelligent control process, and may be implemented by manual operation or other similar means with reference to the above-described intelligent control concept.
Experiments prove that after the control of the embodiment is adopted, the instant heating and constant-temperature comfortable hot water can be reliably realized, and the heating of the machine halt device can not be frequently started and interrupted by short-time water discharge. When the intelligent control device of the control circuit judges that a small amount of hot water is required by a user during water discharge, the intelligent control device controls the cold water to be fully introduced into the water tank, and the hot water in the water tank is directly supplied to the user, so that the gas dual-purpose gas furnace is prevented from being frequently started; when a large amount of hot water is required by a user, the cold water is controlled to be fed into the gas dual-purpose gas furnace for heating and then enters the water tank for the user to use, so that the continuous constant-temperature hot water requirement is met.
Especially, the user can select to use hanging stove as main heat source or use electric heat to carry out pipeline circulation heating as main heat source according to different demands. When the electric heating is used as a main heat source to heat the circulating pipeline, the electric heating of the water tank can meet the pipeline circulating requirement when the pipeline is shorter; when the longer pipeline of pipeline has not completed the circulation yet and the water tank temperature reduces to the settlement temperature, change hanging stove and heat as main heat source, adopt this scheme can adapt to the circulation requirement of different house types different pipe length.
Claims (7)
1. An intelligent hot water circulation system comprises a heating and hot water dual-purpose gas furnace (A) and a hot water circulation device (R), wherein the dual-purpose gas furnace is provided with a heating outlet and a heating return port which form heating circulation with a heating pipeline (G), and a low-temperature inlet (A-1) and a high-temperature outlet (A-2); the water tank is provided with a hot water port (1-1), a water outlet (1-2), a circulating cold water port (1-3) and an electric heating device (h), and is characterized in that: the hot water circulating device is provided with a cold water inlet (6), a circulating outlet (7), a circulating inlet (8), a circulating water return port (9) and a hot water outlet (10); the cold water source is connected with a first connector (3-A) of an electric three-way valve through one (4-1) and two (4-2) of three-way connectors, a second connector (3-B) of the electric three-way valve is connected with a circulating cold water port, and the third connector of the three-way valve is connected with a circulating water return port through a circulating pump (5); the third interface (3-C) of the electric three-way valve is connected with a low temperature inlet through a circulating outlet, the hot water port is connected with a high temperature outlet through a circulating inlet, the water outlet is connected with a water consumption point through a hot water pipe (H) after passing through the hot water outlet, and a hot water pipe adjacent to the water consumption point is branched into a water return pipe (F) connected with a circulating water return port.
2. The intelligent hot water circulation system of claim 1, wherein: the cold water source is connected with one of the three-way connectors after passing through a cold water inlet and a flow sensor (FL), the circulating water return port is connected with the circulating pump through a pipeline temperature sensor (T1) and a one-way valve, and a water tank temperature sensor (T2) is arranged on the water tank; the signal output ends of the water tank temperature sensor, the pipeline temperature sensor and the flow sensor are connected with the corresponding signal input ends of the intelligent control device in the control circuit, and the corresponding control output ends of the intelligent control device are respectively connected with the electric three-way valve, the circulating pump and the controlled end of the electric heating device.
3. The control method of an intelligent hot water circulation system according to claim 2, characterized by comprising the steps of:
the method comprises the steps of firstly, receiving detection signals of a water tank temperature sensor, a pipeline temperature sensor and a flow sensor;
step two, judging whether the instantaneous flow signal of the flow sensor is smaller than a set value, if so, judging that the flow sensor is static, and performing an eighth step; if the water is judged to be not dynamically drained, the next step is carried out;
thirdly, judging whether the total flow of the water discharged at the initial preset time interval is larger than a set value, or whether the falling rate of a temperature signal detected by a water tank temperature sensor is larger than a preset rate, or whether the temperature signal detected by the water tank temperature sensor is lower than the set value; if the judgment result is yes, judging that a large amount of water is used, and entering a fifth step; if the judgment result is that the water is not used, the water is used in a small amount, and the next step is carried out;
the fourth step, the first interface and the second interface of the electric three-way valve are communicated, a cold water source enters the water tank through the first interface and the second interface of the three-way valve, the first interface and the second interface of the electric three-way valve and the circulating cold water port, and hot water is supplied to a water consumption point through a hot water pipe after passing through a hot water outlet from a water outlet of the water tank, and then the sixth step is carried out;
fifthly, the first interface and the third interface of the electric three-way valve are conducted; then the next step is carried out;
a sixth step of judging whether the instantaneous flow signal transmitted by the flow sensor is smaller than a set value, if so, returning to the third step; if yes, carrying out the next step;
seventh, the first interface and the second interface of the electric three-way valve are conducted, and the first step is returned;
eighth, judging that the main heat source of the selected circulating heating pipeline is an electric heating or heating water dual-purpose gas furnace, and when the main heat source is judged to be electric heating, firstly and then controlling the heating of the water tank and the circulating heating of the pipeline; when the main heat source is judged to be a heating and hot water dual-purpose gas furnace, the pipeline is directly controlled to circularly heat; after which the first step is returned.
4. The method of claim 3, wherein the flow sensor is monitored in real time during the control after the static state is determined, and the control is switched to the dynamic water discharge control step when the instantaneous flow signal is greater than a set value.
5. The method for controlling an intelligent hot water circulation system according to claim 4, wherein the steps of controlling the heating of the water tank and the circulating heating of the pipeline are as follows:
step one, judging whether a temperature signal detected by a water tank temperature sensor is lower than a set value, if so, carrying out step five; if the judgment is that the next step is carried out;
step two, starting the water tank electric heating device, and then carrying out the next step;
step three, judging whether the temperature signal detected by the water tank temperature sensor is higher than the sum of the set value and the first preset value, if so, returning to the previous step; if yes, carrying out the next step;
turning off the electric heating device, and then performing the next step;
step five, judging whether the temperature signal detected by the pipeline temperature sensor is lower than a set value, if so, returning to the step one; if yes, carrying out the next step;
step six, the first interface and the second interface of the electric three-way valve are conducted, and the circulating pump is started; then the next step is carried out;
step seven, judging whether the temperature signal detected by the water tank temperature sensor is lower than a set value, and if so, performing step nine; if the judgment is that the step is not finished, the next step is carried out;
step eight, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the step six; if yes, performing step eleventh;
step nine, the first interface and the third interface of the electric three-way valve are conducted; then the next step is carried out;
step ten, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the previous step; if yes, the next step is carried out;
and step eleven, closing the circulating pump, conducting the first interface and the second interface of the electric three-way valve, and returning to the step one.
6. The method for controlling an intelligent hot water circulation system according to claim 5, wherein the step of directly controlling the circulation heating of the pipeline is as follows:
step one, judging whether a temperature signal detected by a pipeline temperature sensor is lower than a set value or not, if so, returning to the step one; if yes, carrying out the next step;
step two, the first and third interfaces of the electric three-way valve are conducted, and the circulating pump is started; then the next step is carried out;
step three, judging whether the temperature signal detected by the pipeline temperature sensor is higher than the sum of the set value and a second preset value, if so, returning to the previous step; if the judgment is that the next step is carried out;
and step four, closing the circulating pump, conducting the first and second interfaces of the electric three-way valve, and returning to the step one.
7. The control method of an intelligent hot water circulation system according to claim 6, wherein: the temperature signal detected by the temperature sensor has a falling rate of 30 s-45 s, the temperature is reduced by 2-3 ℃, the first preset value range is 5-10 ℃, and the second preset value range is 3-5 ℃.
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| CN110056938A (en) * | 2019-04-15 | 2019-07-26 | 江苏迈能高科技有限公司 | A kind of integrated return water heat-exchanging water tank and its control method |
| CN112032996B (en) * | 2019-06-03 | 2022-05-20 | 青岛经济技术开发区海尔热水器有限公司 | Gas heating device and heating hot water supply system |
| CN112303909A (en) * | 2019-07-29 | 2021-02-02 | 青岛经济技术开发区海尔热水器有限公司 | Heating and hot water supply equipment and heating and hot water supply system |
| CN110836533A (en) * | 2019-08-07 | 2020-02-25 | 武汉海尔热水器有限公司 | Gas heating and hot water supply equipment and control method thereof |
| CN112344425A (en) * | 2019-08-07 | 2021-02-09 | 青岛经济技术开发区海尔热水器有限公司 | Gas heating equipment, heating and hot water supplying system and control method thereof |
| CN110836414B (en) * | 2019-08-07 | 2022-07-19 | 青岛经济技术开发区海尔热水器有限公司 | Control method of gas heating and hot water supply equipment |
| CN112344430B (en) * | 2019-08-07 | 2022-05-20 | 青岛经济技术开发区海尔热水器有限公司 | Control method of heating and hot water supply system |
| CN113606655B (en) * | 2021-05-25 | 2022-12-06 | 瑞美(中国)热水器有限公司 | Control method for multi-energy heat supply waterway multi-circulation system |
| CN115218487B (en) * | 2022-07-14 | 2024-03-12 | 宁波方太厨具有限公司 | Control method and system for circulation function of water heater, water heater and storage medium |
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