Storage water heater system and control method

Abstract

The present invention relates to a water storage hot water system and a control method, wherein one end of an internal pipeline is connected to a water inlet of a three-way valve through a first water outlet pipe; the first water outlet of the three-way valve is connected to a lower water inlet of a water storage tank through a return pipe; one end of the first water inlet pipe is connected to the other end of the internal pipeline, and the other end is connected to one end of the first inlet and outlet pipes and is used to connect a water supply port; the other end of the first inlet and outlet pipes is connected to the lower inlet and outlet of the water storage tank; one end of the second inlet and outlet pipe is connected to the second water outlet of the three-way valve, and the other end is placed on the upper part of the water storage tank; one end of the second outlet pipe is connected to the second inlet and outlet pipes, and the other end is used to connect a water point; a water pump is arranged on the first outlet pipe, the return pipe, the first inlet pipe or the internal pipeline. The present invention can effectively reduce the waiting time for bathing heating, reduce energy consumption, and reduce water temperature fluctuations.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a water storage type hot water system and a control method. Background Art

[0002] At present, gas water heater products are mainly divided into fast hot water gas water heaters and water storage gas water heaters. Among them, water storage gas water heaters take into account the characteristics of fast heating of gas water heaters and water storage constant temperature, and are widely used in the field of central hot water supply. However, the control system of water storage gas water heaters in traditional technology has a relatively simple pipeline design, and the preheating process may affect the user's use of the constant temperature hot water in the water tank. Summary of the invention

[0003] The present invention aims to solve at least one technical problem in the background technology and provides a water storage type hot water system and a control method.

[0004] In one embodiment, the present invention provides a water storage hot water system, comprising: a gas water heater, a water storage tank, a first water outlet pipe, a second water outlet pipe, a return pipe, a first water inlet pipe, a first inlet and outlet water pipe, a second inlet and outlet water pipe, a controller, and a three-way valve, a first temperature sensor and a water pump respectively connected to the controller; the first temperature sensor is arranged inside the water storage tank; the gas water heater is connected to the controller and is provided with an internal pipeline inside;

[0005] One end of the internal pipeline is connected to the water inlet of the three-way valve through the first water outlet pipe; the first water outlet of the three-way valve is connected to the lower water inlet of the water storage tank through the return pipe; the first water inlet pipe is connected to the other end of the internal pipeline and one end of the first inlet and outlet pipes, and is used to connect the water supply port; the other end of the first inlet and outlet pipes is connected to the lower water inlet and outlet of the water storage tank; one end of the second inlet and outlet pipe is connected to the second water outlet of the three-way valve, and the other end extends into the inner upper part of the water storage tank; the second outlet pipe is connected to the second inlet and outlet pipes, and is used to connect the water point;

[0006] The water pump is arranged on the first water outlet pipe, the water return pipe, the first water inlet pipe or the internal pipeline.

[0007] In one embodiment, the invention further comprises: a second temperature sensor connected to the controller and disposed at a preset position at the lower part of the water storage tank;

[0008] The first temperature sensor is arranged at a preset position on the upper part of the water storage tank and is lower than the other end of the second inlet and outlet water pipe.

[0009] In one of the embodiments, it also includes: a first water flow sensor disposed on the internal pipeline, and a second water flow sensor disposed on the second water outlet pipe and connected to the controller.

[0010] In one embodiment, the capacity between the upper preset position and the other end of the second inlet and outlet water pipe is between 2.5L and 3.5L.

[0011] In one embodiment, the present invention further provides a storage hot water control method, which is applied to a storage hot water system:

[0012] Methods include:

[0013] When the current mode is the first preset mode and the water use information of the water use point is not obtained, it is determined whether the first current water temperature detected by the first temperature sensor is less than or equal to the first preset water temperature. If so, the water pump is started to return water, and the water inlet and the first water outlet of the three-way valve are opened to allow the water in the first water outlet pipe to flow into the lower part of the water storage tank through the return water pipe;

[0014] When it is determined that the return water has ended, the first water outlet of the three-way valve is closed and the second water outlet of the three-way valve is opened, so that the water in the water tank passes through the first inlet and outlet water pipes and the first water inlet pipe, is heated in the gas water heater, and then flows into the upper part of the water tank through the first water outlet pipe and the second inlet and outlet water pipes until the water pump stops running when the first current water temperature is greater than or equal to the user's preset water temperature.

[0015] In one embodiment, it also includes:

[0016] When the current mode is the first preset mode and a water use signal of a water use point is obtained, it is determined whether the first current water temperature is less than or equal to the second preset water temperature;

[0017] If so, start the water pump and open the water inlet and the first water outlet of the three-way valve, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater, and then flows into the lower part of the water storage tank through the first water outlet pipe and the return pipe, until the water pump stops when the first current water temperature is greater than or equal to the user's preset water temperature.

[0018] In one embodiment, the water storage hot water system further comprises: a second temperature sensor connected to the controller and disposed at a preset position below the water storage tank; and a first temperature sensor disposed at a preset position above the water storage tank:

[0019] The method also includes:

[0020] When the current mode is the second preset mode and the water use information of the water use point is not obtained, it is determined whether the second current water temperature detected by the second temperature sensor is less than or equal to the third preset water temperature. If so, the water pump is started to return water, and the water inlet and the first water outlet of the three-way valve are opened to allow the water in the first water outlet pipe to flow into the lower part of the water storage tank through the return water pipe;

[0021] When it is determined that the return water has ended, the first water outlet of the three-way valve is closed, and the second water outlet of the three-way valve is opened, so that the water in the water tank passes through the first inlet and outlet water pipes and the first water inlet pipe, and after being heated in the gas water heater, flows into the upper part of the water tank through the first water outlet pipe and the second inlet and outlet water pipes, and the water pump is stopped until the first current water temperature and the second current water temperature are greater than or equal to the user's preset water temperature.

[0022] In one embodiment, it also includes:

[0023] When the current mode is the second preset mode and a water use signal of a water use point is obtained, it is determined whether the second current water temperature is less than or equal to the fourth preset water temperature;

[0024] If so, start the water pump and open the water inlet and the first water outlet of the three-way valve, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater, and then flows into the lower part of the water storage tank through the first water outlet pipe and the return pipe. The water pump is stopped until the first current water temperature and the second current water temperature are both greater than or equal to the user's preset water temperature.

[0025] In one of the embodiments, the water storage hot water system further comprises: a first water flow sensor disposed on the internal pipeline;

[0026] In the method, the way to determine the end of backflow is as follows:

[0027] When starting to return water, obtaining a first water flow signal detected by a first water flow sensor received by the gas water heater;

[0028] Obtaining a water return time according to the first water flow signal and the acquired water capacity of the first water outlet pipe;

[0029] When the water return time is reached, it is determined that the water return is completed.

[0030] In one of the embodiments, the water storage hot water system further includes: a second water flow sensor disposed on the second water outlet pipe and connected to the controller;

[0031] The method also includes:

[0032] It is detected whether the second water flow signal sent by the second water flow sensor is received. If so, it is determined that the water use signal of the water use point is obtained; otherwise, it is determined that the water use signal of the water use point is not obtained.

[0033] The present invention provides a water storage hot water system and a control method, which have at least the following technical effects:

[0034] The present invention discloses a water storage type hot water system and control method, wherein, in the water storage type hot water system, a first water outlet pipe is connected to one end of the internal pipeline of the gas water heater and the water inlet of the three-way valve, a return pipe is connected to the first water outlet of the three-way valve and the lower water inlet of the water storage tank, the first water inlet pipe is connected to the other end of the internal pipeline and the first inlet and outlet water pipes, and is also connected to the water supply port, the second inlet and outlet water pipes are connected to the second water outlet of the three-way valve and the upper part of the water storage tank, and the second water outlet pipe is connected to the second inlet and outlet water pipes and the water point respectively. The water pump can be arranged on the first water outlet pipe, the return pipe, the first water inlet pipe or the internal pipeline. Furthermore, the embodiment of the present invention can control the three-way valve reversal through the controller so that the cold water in the first water outlet pipe can be discharged into the lower water inlet of the water storage tank through the return pipe at the beginning of the preheating of the gas water heater, and then control the three-way valve reversal to inject the water heated in the gas water heater through the first inlet pipe of the water supply port into the upper part of the water storage tank through the first water outlet pipe and the second inlet and outlet water pipes. Furthermore, the three-way valve can be controlled to switch to circulate and preheat the gas water heater through the first water inlet and outlet pipes, the first water inlet pipe, the first water outlet pipe and the return pipe. The water storage hot water system of the embodiment of the present invention has a relatively complete system pipeline arrangement, which can help to achieve the function of returning water first and then heating the upper part or circulating and preheating the lower part, thereby effectively reducing the waiting time for bathing heating, reducing energy consumption, and reducing water temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic structural diagram of a water storage hot water system in one embodiment of the present invention is shown;

[0036] Figure 2 A schematic diagram of the circuit structure of a water storage hot water system in one embodiment of the present invention is shown;

[0037] Figure 3 Another structural schematic diagram of a water storage type hot water system in one embodiment of the present invention is shown;

[0038] Figure 4 A schematic flow chart of a storage-type hot water control method in one embodiment of the present invention is shown;

[0039] Figure 5 Another schematic flow chart of a storage-type hot water control method according to an embodiment of the present invention is shown;

[0040] Figure 6 Another schematic flow chart of a storage-type hot water control method according to an embodiment of the present invention is shown;

[0041] Figure 7 Another schematic flow chart of a storage-type hot water control method in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present invention, are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0045] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0046] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present invention belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present invention.

[0047] See also Figure 1 and Figure 2 In one embodiment, the present invention provides a water storage hot water system, including: a gas water heater 10, a water tank 20, a first water outlet pipe 30, a second water outlet pipe 160, a return pipe 40, a first water inlet pipe 50, a first inlet and outlet water pipe 60, a second inlet and outlet water pipe 70, a controller 80, and a three-way valve 90, a first temperature sensor 100 and a water pump 300 respectively connected to the controller 80; the first temperature sensor 100 is arranged inside the water tank; the gas water heater 10 is connected to the controller 80 and is provided with an internal pipeline 130 inside.

[0048] One end of the internal pipeline 130 is connected to the water inlet 102 of the three-way valve 90 through the first water outlet pipe 30; the first water outlet 103 of the three-way valve 90 is connected to the lower water inlet 3 of the water tank 20 through the return pipe 40; the first water inlet pipe 50 is connected to the other end of the internal pipeline 130 and one end of the first inlet and outlet pipe 60, and is used to connect the water supply port 200; the other end of the first inlet and outlet pipe 60 is connected to the lower water inlet and outlet 5 of the water tank 20; one end of the second inlet and outlet pipe 70 is connected to the second water outlet 101 of the three-way valve 90, and the other end is placed on the upper part of the water tank 20; the second outlet pipe 160 is connected to the second inlet and outlet pipe 70, and is used to connect the water use point.

[0049] The water pump 300 is disposed on the first water outlet pipe 30 or the water return pipe 40 or the first water inlet pipe 50 or the internal pipeline 130 .

[0050] The water pump 300 can be arranged on the first water outlet pipe 30 or the return pipe 40 or the first water inlet pipe 50 or the internal pipe 130 according to actual needs. The number of water use points is at least one, for example, including water use point 1 and water use point 2. The controller 80 in the present application can be a controller independent of the gas water heater 10 (the gas water heater itself is provided with a controller), that is, there can be two controllers in the water storage type hot water system; the controller 80 in the present application can also be the only controller in the water storage type hot water system, which controls the controlled electrical components of the water storage type hot water system, and the controller can be arranged inside the gas water heater or on the water storage tank.

[0051] The working principle of the system is described below: the first temperature sensor 100 sends the detected first current water temperature to the controller 80. If the controller 80 does not detect water use at the water point, it can determine whether the first current water temperature is less than or equal to the first preset water temperature. If so, the water pump 300 is started to operate, and the gas water heater 10 starts heating and returns water. At this time, the controller 80 controls the three-way valve 90 to open the water inlet 102 and the first water outlet 103, so that the water in the first water outlet pipe 30 flows into the lower part of the water storage tank 20 through the return pipe 40. When it is determined that the return water has ended, the controller 80 closes the first water outlet 103 of the three-way valve 90 and opens the second water outlet 101, so that the water in the water tank 20 is heated in the gas water heater 10 through the first inlet and outlet water pipes 60 and the first water inlet pipe 50, and then flows into the upper part of the water tank 80 through the first inlet and outlet water pipes 30 and the second inlet and outlet water pipes 70, until the first current water temperature is greater than or equal to the user's preset water temperature, and the water pump 300 stops running to end the heating of the gas water heater 10.

[0052] Furthermore, when the controller 80 detects that water is being used at the water point, it determines whether the first current water temperature is less than or equal to the second preset water temperature. If so, the water pump 300 is started, and the gas water heater 10 starts to heat. At this time, the water inlet 102 and the first water outlet 103 of the three-way valve 90 are opened, and the second water outlet 101 is closed, so that the water from the water supply port 200 through the first water inlet pipe 50 is heated in the gas water heater 10, and then flows into the lower part of the water tank 20 through the first water outlet pipe 30 and the return pipe 40 until the first current water temperature is greater than or equal to the user's preset water temperature. This does not affect the continued use of hot water in the upper part of the water tank 20 during bathing, reducing water temperature fluctuations. Generally, the first preset water temperature is lower than the second preset temperature. A temperature difference of 3°C can be used.

[0053] The water storage hot water system of the embodiment of the present invention further optimizes the pipeline layout, making the pipeline arrangement more perfect and reasonable. Therefore, after the cold water originally reserved in the first water outlet pipe 30 is discharged, the upper part of the water tank can be heated, and the water in the entire water tank 20 does not need to be preheated before bathing, which shortens the waiting time of the user. At the same time, the cold water in the initial preheating stage can be introduced into the lower part of the water tank 20 through the return water operation to reduce the impact on the water temperature in the upper part of the water tank 20, so that the water temperature of the user is more constant when bathing.

[0054] In the water storage hot water system of the embodiment of the present invention, the first water outlet pipe 30 is connected to one end of the internal pipeline of the gas water heater 10 and the water inlet 102 of the three-way valve 90, the return pipe 40 is connected to the first water outlet 103 of the three-way valve 90 and the lower water inlet of the water storage tank 20, the first water inlet pipe 50 is connected to the other end of the internal pipeline and the first inlet and outlet pipes 60, and is also connected to the water supply port 200, the second inlet and outlet pipes 70 are connected to the second outlet 101 of the three-way valve 90 and the upper part of the water storage tank 20, and the second outlet pipe 160 is respectively connected to the second inlet and outlet pipes 70 and the water point. The water pump 300 can be arranged on the first outlet pipe 30, the return pipe 40, the first inlet pipe 50 or the internal pipeline 130. Furthermore, in the embodiment of the present invention, the water tank controller 80 can control the three-way valve 90 to switch so that the cold water in the first water outlet pipe 30 can be discharged into the lower water inlet of the water storage tank 20 through the return pipe 40 at the beginning of the preheating of the gas water heater 10, and then the three-way valve 90 can be controlled to switch the water heated in the gas water heater 10 through the first water inlet pipe 50 at the water supply port 200 through the first water outlet pipe 30 and the second water inlet and outlet pipe 70 to the upper part of the water storage tank 20. Further, the three-way valve 90 can be controlled to switch the gas water heater 10 through the first water inlet and outlet pipe 60, the first water inlet pipe 50, the first water outlet pipe 30 and the return pipe 40 to perform the circulation preheating of the gas water heater 10. The water storage hot water system of the embodiment of the present invention has a relatively perfect system pipeline arrangement, which can help to realize the function of returning water first and then heating the upper part or circulating preheating the lower part, thereby effectively reducing the waiting time for bathing heating, reducing energy consumption, and reducing water temperature fluctuations.

[0055] See also Figure 2 and 3 In a specific embodiment, it also includes: a second temperature sensor 120 connected to the controller 80 and arranged at a preset position at the lower part of the water tank 20.

[0056] The first temperature sensor 100 is disposed at a preset position on the upper portion of the water storage tank 20 and is lower than the other end of the second water inlet and outlet pipe 70 .

[0057] For example, when the water use information of the water use point is not obtained, the controller 80 may use the situation that the first current water temperature detected by the first temperature sensor 100 is less than or equal to the first preset water temperature, and when the water use information of the water use point is obtained, the situation that the first current water temperature is less than or equal to the second preset water temperature as the trigger condition for heating. When the controller 80 does not obtain the water use at the water use point, if the first current water temperature is less than or equal to the first preset water temperature, the water return is started, and when the water return is completed, the circulation heating is performed from the upper part of the water storage tank 20. Or when the controller 80 detects the water use at the water use point, if the first current water temperature is less than or equal to the second preset water temperature, the heating is started from the lower part of the water storage tank.

[0058] In the embodiment of the present invention, the first temperature sensor 100 can detect whether the first current water temperature is less than or equal to the first preset water temperature or the second preset water temperature, so as to control the start of the water pump 300 to heat the gas water heater, thereby making full use of the hot water in the water tank, reducing energy consumption, and reducing the waiting time for bathing, as well as continuously and timely providing sufficient hot water during bathing.

[0059] For another example, the second temperature sensor 120 sends the detected second current water temperature to the controller 80. When the water consumption information of the water point is not obtained, the controller 80 may use the situation that the second current water temperature detected by the second temperature sensor 120 is less than or equal to the third preset water temperature, and when the water consumption information of the water point is obtained, the situation that the second current water temperature is less than or equal to the fourth preset water temperature as a trigger condition for heating. When the controller 80 does not obtain the water consumption of the water point, it can determine whether the second current water temperature is less than or equal to the third preset water temperature. If so, the water pump 300 is started, and the gas water heater 10 starts heating and returns water. When the water return is completed, the upper part of the water storage tank 20 is circulated and heated until the first current water temperature detected by the first temperature sensor 100 and the second current water temperature detected by the second temperature sensor 120 are greater than or equal to the user's preset water temperature. Furthermore, when the controller 80 detects water use at a water use point, it can determine whether the second current water temperature detected by the second temperature sensor 120 is less than or equal to the fourth preset water temperature. If so, the water pump 300 is started to heat the lower part of the water storage tank 20 through the gas water heater 10 until the first current water temperature and the second current water temperature are greater than or equal to the user-preset water temperature.

[0060] Generally, the third preset water temperature is less than or equal to the fourth preset water temperature.

[0061] In the water storage hot water system of the embodiment of the present invention, the second temperature sensor 120 is arranged at a preset position at the lower part of the water storage tank 20. Then, when hot water is consumed for bathing, the water temperature at the lower part of the water storage tank 20 begins to decrease. After bathing, when the water point does not use water, if the second current water temperature detected by the second temperature sensor 120 is less than or equal to the third preset water temperature, the controller 80 can start the water pump 300 in time to heat the gas water heater 10. If the water point continues to use water, when the second current water temperature detected by the second temperature sensor 120 is less than or equal to the fourth preset water temperature, the water storage tank 20 is circulated and heated to the user's preset water temperature. The embodiment of the present invention can heat the water in the water tank in time through the second temperature sensor 120, which helps to further provide constant temperature hot water for bathing and improve the comfort of bathing.

[0062] See also Figure 3 and Figure 2 In a specific embodiment, it also includes: a first water flow sensor 150 arranged on the internal connecting pipe 130, and a second water flow sensor 140 arranged on the second water outlet pipe 160 and connected to the controller 80.

[0063] Then, the controller 80 can obtain the first water flow signal detected by the first water flow sensor 100 through the first water flow sensor 100. When the controller 80 starts to start the water pump to heat the gas water heater 10 and return water, if the water flow represented by the first water flow signal is less than or equal to the preset water flow, it means that the gas water heater 10 is in a standby state, and the gas water heater 10 does not start heating and returning water. Otherwise, it starts heating and returning water. Further, the second water flow sensor 140 sends the detected second water flow signal to the controller 80. The controller 80 can determine whether the water use information of the water use point is obtained by whether the second water flow signal sent by the second water flow sensor 140 is received.

[0064] The water storage hot water system of the embodiment of the present invention has a relatively complete circuit module composition, which is conducive to improving the reliability of water use detection and heating return water, effectively realizing timely and high-precision hot water preheating, and reducing energy consumption.

[0065] In a specific embodiment, in order to provide hot water in a timely and relatively continuous manner, the capacity between the upper preset position and the other end of the second water inlet and outlet pipe 70 is between 2.5L and 3.5L.

[0066] In the water storage hot water system of the embodiment of the present invention, when the controller 80 detects through the first temperature sensor 100 that the first current water temperature is at the first preset water temperature or the second preset water temperature, it is considered that the remaining stored hot water cannot meet the usage. At this time, the controller 80 can start the water pump 300 to control the gas water heater 10 to start heating, thereby helping to continuously provide hot water for bathing, reducing water temperature fluctuations, and making full use of the stored hot water in the water tank.

[0067] See also Figure 4 and Figure 1 , In one embodiment, the present invention also provides a storage hot water control method, which is applied to a storage hot water system;

[0068] Methods include:

[0069] Step S410: When the current mode is the first preset mode and the water usage information of the water usage point is not obtained, it is determined whether the first current water temperature detected by the first temperature sensor is less than or equal to the first preset water temperature. If so, the water pump is started to return water, and the water inlet and the first water outlet of the three-way valve are opened to allow the water in the first water outlet pipe to flow into the lower part of the water storage tank through the return pipe.

[0070] The controller can obtain the operating mode sent by the user. If the controller recognizes that the current mode is the first preset mode, it enters the first preset mode. Among them, the first preset mode is a mode in which when the water consumption information of the water use point is not obtained, the first current water temperature detected by the first temperature sensor is less than or equal to the first preset water temperature, and when the water consumption information of the water use point is obtained, the first current water temperature is less than or equal to the second preset water temperature as the trigger condition for heating. When the current mode is the first preset mode and the water consumption information of the water use point is not obtained, it is determined whether the first current water temperature is less than or equal to the first preset water temperature. If so, the water pump is started and the gas water heater starts heating to return water. Among them, a water flow sensor connected to the controller can be set on the second water outlet pipe, so that the controller can obtain the water consumption information of the water use point through the water flow sensor.

[0071] Step S420: When it is determined that the return water has ended, close the first water outlet of the three-way valve and open the second water outlet of the three-way valve, so that the water in the water tank passes through the first inlet and outlet water pipes and the first water inlet pipe, is heated in the gas water heater, and then flows into the upper part of the water tank through the first water outlet pipe and the second inlet and outlet water pipes, until the water pump stops running when the first current water temperature is greater than or equal to the user's preset water temperature.

[0072] When the controller determines that the water return is finished, the first water outlet of the three-way valve is closed and the second water outlet is opened to make the three-way valve reverse, and the upper part of the water tank is heated until the first current water temperature is greater than or equal to the preset user water temperature. The function of performing water return during heating is to discharge the water originally reserved in the first water outlet pipe into the lower part of the water tank, so as to prevent the water with lower temperature from flowing into the upper part of the water tank and affecting the upper water temperature.

[0073] It should be noted that the description and limitations of the water storage type hot water system in the embodiment of the present invention can refer to the description and limitations of the water storage type hot water system in the above text, and will not be repeated here.

[0074] In the storage hot water control method of the embodiment of the present invention, the controller is in the first preset mode, if there is no water use information at the water point, the controller can judge the first current water temperature detected by the first temperature sensor, thereby starting the water pump to control the gas water heater to heat and return water. When the first current temperature reaches the user's preset water temperature, the water pump can be stopped to end the heating of the gas water heater. When there is no user using water, this method pumps water from the water tank into the gas water heater for heating, and flows into the water tank from the top, which can supply hot water as quickly as possible, and bathing can be performed without heating the water in the entire water tank, which helps to shorten the waiting time for users.

[0075] Furthermore, the storage hot water control method of the embodiment of the present invention is applied to the storage hot water system, and then the three-way valve reversal can be controlled by the controller, so that at the beginning of the preheating of the gas water heater, the cold water in the first water outlet pipe can be discharged into the lower water inlet of the water storage tank through the return pipe, and then the three-way valve reversal is controlled to inject the water heated in the gas water heater through the first water inlet pipe into the upper part of the water storage tank through the first water outlet pipe and the second water inlet and outlet pipes for upper heating. The storage hot water control method of the embodiment of the present invention has a relatively complete water storage hot water system pipeline arrangement, which can help realize the function of returning water first and then heating the upper part, thereby effectively reducing the waiting time for bathing heating, reducing energy consumption, and reducing water temperature fluctuations.

[0076] See also Figure 5 , in a specific embodiment, further comprising:

[0077] Step S510: When the current mode is the first preset mode and a water use signal of a water use point is obtained, it is determined whether the first current water temperature is less than or equal to the second preset water temperature.

[0078] Step S520: If yes, start the water pump and open the water inlet and the first water outlet of the three-way valve, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater, and then flows into the lower part of the water storage tank through the first water outlet pipe and the return pipe, and the water pump is stopped until the first current water temperature is greater than or equal to the user's preset water temperature.

[0079] The first preset water temperature is lower than the second preset water temperature, and preferably, the temperature difference between the first preset water temperature and the second preset water temperature is about 3° C. Thus, the reduction of hot water can be dealt with more quickly, and sufficient hot water can be provided for bathing in time when water is used at the water point.

[0080] The water storage type hot water control method of the embodiment of the present invention can fully utilize the hot water in the water tank for bathing, while heating it from the bottom of the water tank, while reducing the impact on the water temperature in the upper part of the water tank, so as to reduce the water temperature fluctuation during bathing and further improve the bathing comfort.

[0081] See also Figure 6 and Figure 3 In a specific embodiment, the water storage hot water system also includes: a second temperature sensor 120 connected to the controller and arranged at a preset position at the lower part of the water tank 20; and a first temperature sensor 100 arranged at a preset position at the upper part of the water tank 20.

[0082] The method also includes:

[0083] Step S610: When the current mode is the second preset mode and the water usage information of the water usage point is not obtained, it is determined whether the second current water temperature detected by the second temperature sensor is less than or equal to the third preset water temperature. If so, the water pump is started to return water, and the water inlet and the first water outlet of the three-way valve are opened to allow the water in the first outlet pipe to flow into the lower part of the water tank through the return pipe.

[0084] Preferably, the first preset water temperature is less than or equal to the third preset water temperature, and the temperature difference can be about 2.5°C. Since the water temperature at the bottom of the water tank will drop before the water temperature at the top when the water point is using water, in order to provide sufficient hot water for bathing in time. When the controller is in the second preset mode, if the water use information of the water point is not obtained, it can determine whether to start the water pump to heat the gas water heater for return water by judging whether the second current water temperature is less than or equal to the third preset water temperature. If so, it will be started, otherwise it will not be started. Among them, the second preset mode is a mode in which when the water use information of the water point is not obtained, the second current water temperature detected by the second temperature sensor is less than or equal to the third preset water temperature, and when the water use information of the water point is obtained, the second current water temperature is less than or equal to the fourth preset water temperature as the trigger condition for heating.

[0085] Step S620: When it is determined that the return water has ended, close the first water outlet of the three-way valve and open the second water outlet of the three-way valve, so that the water in the water tank is heated in the gas water heater through the first inlet and outlet water pipes and the first water inlet pipe, and then flows into the upper part of the water tank through the first water outlet pipe and the second inlet and outlet water pipes, until the first current water temperature and the second current water temperature are greater than or equal to the user-preset water temperature, and the gas water heater heating is terminated.

[0086] In order to further prevent the partial water stored between the first temperature sensor and the second temperature sensor in the water tank from failing to reach the expected water temperature, thereby causing the water temperature to fluctuate and become non-constant during bathing, the water in the water tank can be heated from the top through the first water outlet pipe and the second inlet and outlet pipes until the first current water temperature and the second current water temperature are greater than or equal to the user's preset water temperature, and the water pump is stopped to end the heating of the gas water heater.

[0087] Furthermore, since the water temperature in the water tank gradually decreases from the bottom to the top when the water point is using water, the water temperature detected by the first temperature sensor gradually decreases accordingly. If the current mode is the first preset mode, and when the water point is not using water, the first current water temperature is less than or equal to the first preset water temperature, it means that the water in the water tank below the first temperature sensor is relatively cold, or when the water point is using water, the first current water temperature is less than or equal to the second preset water temperature, it means that the remaining hot water in the water tank is about to run out, and the water pump can be started to start heating the gas water heater. The embodiment of the present invention is conducive to fully utilizing the hot water in the water tank. Furthermore, it can be heated from the top of the water tank, and bathing can be performed without heating the water in the entire water tank, so that the first preset mode achieves the effect of energy saving.

[0088] In the water storage hot water control method of the embodiment of the present invention, the first temperature sensor is arranged at the upper preset position of the water storage tank, and the second temperature sensor is arranged at the lower preset position of the water storage tank. Therefore, the energy-saving effect can be achieved when entering the first preset mode, and the effect of timely providing sufficient hot water for bathing can be achieved when entering the second preset mode. When entering the first preset mode, the hot water above the first temperature sensor is usually required to meet the demand; when entering the second preset mode, the hot water above the second temperature sensor is usually required to meet the demand. Therefore, the first preset mode is a relatively energy-saving working mode.

[0089] Furthermore, when the controller is in the second preset mode, if the water use information of the water use point is not obtained, when the water temperature of the water in the lower part of the water storage tank is lower than the third preset water temperature, the water pump can be started in time to make the gas water heater start heating, and water can be returned at the beginning of heating to prevent cold water from pouring into the upper part of the water storage tank and affecting the upper water temperature. After the return of water, heating starts from the upper part until the first current water temperature and the second current water temperature are greater than or equal to the user's preset water temperature. The embodiment of the present invention can provide sufficient hot water for bathing to meet the user's bathing needs more continuously, and can keep the water temperature of the upper and lower parts of the water storage tank consistent or close.

[0090] See also Figure 7 , in a specific embodiment, further comprising:

[0091] Step S710: When the current mode is the second preset mode and a water use signal of a water use point is obtained, it is determined whether the second current water temperature is less than or equal to a fourth preset water temperature.

[0092] When the water point is using water, the water temperature in the lower part of the water tank will drop before the water temperature in the upper part, so in order to provide sufficient hot water for bathing. In the second preset mode, if the controller obtains the water use signal of the water point, it can determine whether to start the water pump to make the gas water heater start heating by judging whether the second current water temperature detected by the second temperature sensor is less than or equal to the fourth preset water temperature. Preferably, the third preset water temperature is less than the fourth preset water temperature, and the temperature difference can be about 3°C. The second preset water temperature is less than or equal to the fourth preset water temperature, and the temperature difference can be about 2.5°C.

[0093] Step S720: If yes, start the water pump and open the water inlet and the first water outlet of the three-way valve, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater, and then flows into the lower part of the water storage tank through the first water outlet pipe and the return pipe. The water pump is stopped until the first current water temperature and the second current water temperature are both greater than or equal to the user-preset water temperature.

[0094] When the second current water temperature is lower than the third preset water temperature, the water pump is started to heat the gas water heater, and the water inlet and the first water outlet of the three-way valve are opened to allow part of the water from the water supply port to flow into the lower water inlet and outlet of the water storage tank through the first inlet and outlet pipes, and the other part of the water is heated in the gas water heater through the first water inlet pipe, and then flows into the lower part of the water storage tank through the first water outlet pipe and the return pipe. The water pump is stopped until the first current water temperature and the second current water temperature are both greater than or equal to the user's preset water temperature, and the heating of the gas water heater is ended.

[0095] The storage hot water control method of the embodiment of the present invention, after entering the second preset mode, if the water use information of the water use point is obtained, when the water from the water supply port flows into the water storage tank during bathing, causing the water temperature of the lower part of the water storage tank to drop to the third preset water temperature, the water pump can be started in time to heat the lower part of the water storage tank until the first temperature sensor and the second temperature sensor detect that the water temperature of the upper and lower parts of the whole tank of water reaches the user's preset water temperature. The embodiment of the present invention can provide sufficient hot water for bathing while reducing the impact on the upper water temperature to meet the bathing needs of multiple people.

[0096] See also Figure 3 In a specific embodiment, the water storage type hot water system further includes: a first water flow sensor 150 disposed on the internal pipeline 130 .

[0097] The way to determine the end of backflow is as follows:

[0098] Step S10: When water return starts, a first water flow signal detected by a first water flow sensor is obtained.

[0099] Step S20: Obtaining the water return time according to the first water flow signal and the acquired water capacity of the first water outlet pipe.

[0100] Step S30: When the water return time is reached, determine that the water return is completed.

[0101] According to the first water flow rate signal detected by the first water volume sensor and the water capacity of the first water outlet pipe, the time required to drain the water originally reserved in the first water outlet pipe from the start of water return to the end of water return, i.e., the water return time, can be calculated. Then, when water return starts, the controller can determine whether water return is completed according to the water return time.

[0102] The water storage hot water control method of the embodiment of the present invention can obtain the return water time according to the first water flow signal and the water capacity of the first water outlet pipe, thereby improving the judgment accuracy of the return water and replenishing the hot water to the water storage tank in time, which helps to reduce the waiting time for bathing, and at the same time can reduce water temperature fluctuations and optimize the constant temperature bathing function.

[0103] join Figure 3 In a specific embodiment, the water storage type hot water system further includes: a second water flow sensor 140 disposed on the second water outlet pipe 160 and connected to the controller.

[0104] The method further comprises:

[0105] Step S50: Detect whether the second water flow signal sent by the second water flow sensor is received, if so, determine that the water use signal of the water use point is obtained, otherwise, determine that the water use signal of the water use point is not obtained.

[0106] The storage-type hot water control method of the embodiment of the present invention helps to improve the water use detection accuracy of water use points, thereby timely meeting bathing needs and improving reliability.

[0107] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow chart, and the combination of boxes in the structure diagram and / or the flow chart, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0108] In addition, the functional modules or units in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0109] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0110] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water storage hot water system, characterized in that: include: A gas water heater (10), a water storage tank (20), a first water outlet pipe (30), a second water outlet pipe (160), a water return pipe (40), a first water inlet pipe (50), a first water inlet and outlet pipe (60), a second water inlet and outlet pipe (70), a controller (80), and a three-way valve (90) respectively connected to the controller (80), a first temperature sensor (100) and a water pump (300); the first temperature sensor (100) is arranged inside the water storage tank (20); the gas water heater (10) is connected to the controller (80) and is provided with an internal pipeline (130) therein; One end of the internal pipeline (130) is connected to the water inlet (102) of the three-way valve (90) through the first water outlet pipe (30); the first water outlet (103) of the three-way valve (90) is connected to the lower water inlet (3) of the water storage tank (20) through the return pipe (40); the first water inlet pipe (50) is connected to the other end of the internal pipeline (130) and one end of the first water inlet and outlet pipe (60), and is used to connect the water supply port; the other end of the first water inlet and outlet pipe (60) is connected to the lower water inlet and outlet (5) of the water storage tank (20); one end of the second water inlet and outlet pipe (70) is connected to the second water outlet (101) of the three-way valve (90), and the other end extends into the inner upper part of the water storage tank (20); the second water outlet pipe (160) is connected to the second water inlet and outlet pipe (70), and is used to connect the water use point; The water pump (300) is arranged on the first water outlet pipe (30) or the water return pipe (40) or the first water inlet pipe (50) or the internal pipe (130); The water storage hot water system further comprises: a second temperature sensor (120) connected to the controller (80) and arranged at a preset position below the water storage tank; the first temperature sensor (100) is arranged at a preset position above the water storage tank; Wherein, the controller executes a control method for a water storage hot water system, the method comprising: When the current mode is the first preset mode and the water use information of the water use point is not obtained, it is determined whether the first current water temperature detected by the first temperature sensor (100) is less than or equal to the first preset water temperature. If so, the water pump (300) is started to return water, and the water inlet and the first water outlet of the three-way valve (90) are opened, so that the water in the first water outlet pipe (30) flows into the lower part of the water storage tank (20) through the return pipe; when it is determined that the return water is finished, the first water outlet of the three-way valve (90) is closed and the second water outlet of the three-way valve (90) is opened, so that the water in the water storage tank (30) is heated in the gas water heater (10) through the first inlet and outlet pipe (50) and the first inlet pipe (50), and then flows into the upper part of the water storage tank (20) through the first outlet pipe (30) and the second inlet and outlet pipe (70), until the first current water temperature is greater than or equal to the user preset water temperature, and then the water pump (300) is stopped; When the current mode is the first preset mode and the water use signal of the water use point is obtained, it is determined whether the first current water temperature is less than or equal to the second preset water temperature; if so, the water pump (300) is started to operate, and the water inlet and the first water outlet of the three-way valve (90) are opened, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater (10) and then flows into the lower part of the water storage tank (20) through the first water outlet pipe (30) and the return pipe (40), until the first current water temperature is greater than or equal to the user preset water temperature, and then the water pump (300) is stopped; When the current mode is the second preset mode and the water consumption information of the water use point is not obtained, it is determined whether the second current water temperature detected by the second temperature sensor (120) is less than or equal to the third preset water temperature. If so, the water pump (300) is started to return water, and the water inlet and the first water outlet of the three-way valve (90) are opened to allow the water in the first water outlet pipe (30) to flow into the lower part of the water storage tank (20) through the return water pipe; when it is determined that the return water is finished, the first water outlet of the three-way valve (90) is closed and the second water outlet of the three-way valve (90) is opened to allow the water in the water storage tank (20) to be heated in the gas water heater through the first inlet and outlet water pipes and the first inlet pipe, and then flow into the upper part of the water storage tank (20) through the first outlet water pipe and the second inlet and outlet water pipes, until the first current water temperature and the second current water temperature are greater than or equal to the user preset water temperature, the water pump (300) is stopped; When the current mode is the second preset mode and the water use signal of the water use point is obtained, it is determined whether the second current water temperature is less than or equal to the fourth preset water temperature; if so, the water pump (300) is started to operate, and the water inlet and the first water outlet of the three-way valve (90) are opened, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater (10) and then flows into the lower part of the water storage tank (20) through the first water outlet pipe and the return pipe, until the first current water temperature and the second current water temperature are both greater than or equal to the user preset water temperature, and the water pump (300) is stopped; Among them, the first preset water temperature is lower than the second preset water temperature, the third preset water temperature is lower than the fourth preset water temperature, the second preset water temperature is lower than or equal to the fourth preset water temperature, and the first preset water temperature is lower than or equal to the third preset water temperature.

2. The water storage hot water system according to claim 1, characterized in that: Also includes: a second temperature sensor (120) connected to the controller (80) and disposed at a preset position below the water storage tank (20); The first temperature sensor (100) is arranged at a preset position on the upper part of the water storage tank and is lower than the other end of the second water inlet and outlet pipe (70).

3. The water storage hot water system according to claim 2, characterized in that: The capacity between the upper preset position and the other end of the second water inlet and outlet pipe (70) is between 2.5L and 3.5L.

4. The water storage hot water system according to claim 1, characterized in that: Also includes: A first water flow sensor (150) is provided on the internal pipeline (130), and a second water flow sensor (140) is provided on the second water outlet pipe (160) and connected to the controller (80).

5. A storage hot water control method, characterized in that: Applicable to the water storage hot water system described in claim 1; The method comprises: When the current mode is the first preset mode and the water usage information of the water usage point is not obtained, it is determined whether the first current water temperature detected by the first temperature sensor (100) is less than or equal to the first preset water temperature. If so, the water pump (300) is started to return water, and the water inlet and the first water outlet of the three-way valve (90) are opened to allow the water in the first water outlet pipe (30) to flow into the lower part of the water storage tank (20) through the return water pipe; When it is determined that the water return is finished, the first water outlet of the three-way valve (90) is closed and the second water outlet of the three-way valve (90) is opened, so that the water in the water storage tank (30) is heated in the gas water heater (10) through the first water inlet and outlet pipe (50) and the first water inlet pipe (50), and then flows into the upper part of the water storage tank (20) through the first water outlet pipe (30) and the second water inlet and outlet pipe (70), until the first current water temperature is greater than or equal to the user's preset water temperature, and then the water pump (300) stops operating.

6. The storage hot water control method according to claim 5, characterized in that: Also includes: When the current mode is the first preset mode and the water use signal of the water use point is obtained, determining whether the first current water temperature is less than or equal to the second preset water temperature; If so, the water pump (300) is started and the water inlet and the first water outlet of the three-way valve (90) are opened, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater (10) and then flows into the lower part of the water storage tank (20) through the first water outlet pipe (30) and the return pipe (40), and the water pump (300) is stopped until the first current water temperature is greater than or equal to the user preset water temperature.

7. The storage hot water control method according to claim 5, characterized in that: The water storage hot water system further comprises: a second temperature sensor (120) connected to the controller (80) and arranged at a preset position below the water storage tank; the first temperature sensor (100) is arranged at a preset position above the water storage tank; The method further comprises: When the current mode is the second preset mode and the water usage information of the water use point is not obtained, it is determined whether the second current water temperature detected by the second temperature sensor (120) is less than or equal to the third preset water temperature. If so, the water pump (300) is started to return water, and the water inlet and the first water outlet of the three-way valve (90) are opened to allow the water in the first water outlet pipe (30) to flow into the lower part of the water storage tank (20) through the return water pipe; When it is determined that the water return is finished, the first water outlet of the three-way valve (90) is closed, and the second water outlet of the three-way valve (90) is opened, so that the water in the water storage tank (20) passes through the first inlet and outlet water pipes and the first water inlet pipe, and after being heated in the gas water heater, flows into the upper part of the water storage tank (20) through the first water outlet pipe and the second inlet and outlet water pipes, until the first current water temperature and the second current water temperature are greater than or equal to the user preset water temperature, and the water pump (300) stops operating.

8. The storage hot water control method according to claim 7, characterized in that: Also includes: When the current mode is the second preset mode and the water use signal of the water use point is obtained, it is determined whether the second current water temperature is less than or equal to the fourth preset water temperature; If so, the water pump (300) is started and the water inlet and the first water outlet of the three-way valve (90) are opened, so that the water from the water supply port through the first water inlet pipe is heated in the gas water heater (10) and then flows into the lower part of the water storage tank (20) through the first water outlet pipe and the return pipe until the first current water temperature and the second current water temperature are both greater than or equal to the user-preset water temperature, and then the water pump (300) is stopped.

9. The storage hot water control method according to claim 5, characterized in that: The water storage hot water system further comprises: a first water flow sensor (150) arranged on the internal pipeline; In the method, the way to determine the end of the water return is as follows: When water return begins, obtaining a first water flow signal detected by the first water flow sensor (150); Obtaining a water return time according to the first water flow signal and the acquired water capacity of the first water outlet pipe (30); When the water return time is reached, it is determined that the water return is completed.

10. The storage hot water control method according to any one of claims 5 to 9, characterized in that: The water storage type hot water system further comprises: a second water flow sensor (140) disposed on the second water outlet pipe (160) and connected to the controller (80); It is detected whether the second water flow signal sent by the second water flow sensor (140) is received. If so, it is determined that the water use signal of the water use point is obtained; otherwise, it is determined that the water use signal of the water use point is not obtained.

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