Gas water heater operation method and device and gas water heater

Abstract

The invention relates to a gas water heater operation method and device and a gas water heater, the hot water use state of the gas water heater can be determined by monitoring the real-time pipeline water pressure of the gas water heater, and when it is detected that the gas water heater is in a zero cold water mode and a hot water faucet is opened, the hot water faucet is opened. Water circulation of the gas water heater can be stopped by closing a circulating water pump of the gas water heater. According to the scheme, when a user opens the hot water faucet to use water, the circulating water pump can be automatically closed, so that the situation of secondary heating of hot water is avoided, the phenomenon that the water temperature rises in the using process of the gas water heater is relieved, and the constant-temperature performance of the gas water heater can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas water heaters, and particularly to a method and device for operating a gas water heater and a gas water heater. Background Art

[0002] With the development of science and technology, gas water heaters are deeply loved by users due to their advantages such as small volume and instant heating. Zero-cold-water gas water heaters can achieve "zero cold water" discharge and are more favored by users.

[0003] During the use of a zero-cold-water gas water heater, the circulation pump continuously drives the water circulation for heating, causing the already heated water to be heated again, and thus the water temperature rises. Summary of the Invention

[0004] Based on this, in view of the problem of water temperature rise during the use of a gas water heater, it is necessary to propose a method and device for operating a gas water heater and a gas water heater to alleviate the phenomenon of water temperature rise and improve the constant temperature performance of the gas water heater.

[0005] The present application provides a method for operating a gas water heater, including: obtaining the real-time pipeline water pressure of the gas water heater; determining the hot water usage state of the gas water heater according to the real-time pipeline water pressure; if the hot water faucet is turned on when the gas water heater is in the zero-cold-water mode, turning off the circulation pump of the gas water heater and maintaining hot water output.

[0006] In one embodiment, the determining the hot water usage state of the gas water heater according to the real-time pipeline water pressure includes: obtaining the static pipeline water pressure of the gas water heater in the non-working state; determining the hot water usage state of the gas water heater according to the real-time pipeline water pressure and the static pipeline water pressure.

[0007] In one embodiment, the determining the hot water usage state of the gas water heater according to the real-time pipeline water pressure and the static pipeline water pressure includes: obtaining a first water pressure difference between the real-time pipeline water pressure and the static pipeline water pressure; in the case where the first water pressure difference is greater than or equal to a first preset water pressure threshold, using the real-time pipeline water pressure in the current state as the zero-cold-water pipeline water pressure; during the operation of the gas water heater in the zero-cold-water mode, determining the hot water usage state according to the real-time pipeline water pressure and the zero-cold-water pipeline water pressure.

[0008] In one embodiment, the determining the hot water usage state according to the real-time pipeline water pressure and the zero-cold-water pipeline water pressure includes: obtaining a second water pressure difference between the zero-cold-water pipeline water pressure and the real-time pipeline water pressure; in the case where the second water pressure difference is greater than or equal to a second preset water pressure threshold, determining that the hot water faucet of the gas water heater is turned on.

[0009] In one embodiment, when the hot water faucet is turned on while the gas water heater is in the zero cold water mode, after turning off the circulation pump of the gas water heater and maintaining hot water output, the method further includes: when it is determined that the hot water faucet is closed according to the real-time pipeline water pressure, controlling the circulation pump to turn on to enter the zero cold water mode.

[0010] In one embodiment, the method further includes: if it is determined that the pipeline water pressure increases according to the real-time pipeline water pressure, determining that the hot water faucet is closed.

[0011] In one embodiment, the method further includes: when receiving a zero cold water off instruction, turning off the circulation pump of the gas water heater; or, when receiving a zero cold water on instruction, turning on the circulation pump of the gas water heater to enter the zero cold water mode.

[0012] In one embodiment, after obtaining the real-time pipeline water pressure of the gas water heater, the method further includes: when it is determined that the hot water faucet is closed according to the real-time pipeline water pressure, controlling the circulation pump to turn on to enter the zero cold water mode; when it is determined that the hot water faucet is open according to the real-time pipeline water pressure, controlling the circulation pump to turn off and maintaining hot water output.

[0013] A gas water heater operation device includes: a water pressure acquisition module for acquiring the real-time pipeline water pressure of the gas water heater; a state analysis module for determining the hot water usage state of the gas water heater according to the real-time pipeline water pressure; an exit control module for turning off the circulation pump of the gas water heater and maintaining hot water output when the gas water heater is in the zero cold water mode and the hot water faucet is turned on.

[0014] A gas water heater includes a pressure detector and a controller connected to each other. The pressure detector is used to detect the real-time pipeline water pressure, and the controller is used to execute the steps of the above gas water heater operation method.

[0015] The above gas water heater operation method, device and gas water heater can determine the hot water usage state of the gas water heater by monitoring the real-time pipeline water pressure of the gas water heater. When it is detected that the gas water heater is in the zero cold water mode and the hot water faucet is turned on, the water circulation can be stopped by turning off the circulation pump of the gas water heater. In this solution, when the user turns on the hot water faucet to use water, the circulation pump can be automatically turned off, thereby avoiding the situation of secondary heating of hot water, alleviating the phenomenon of rising water temperature during the use of the gas water heater, and effectively improving the constant temperature performance of the gas water heater. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the operation method flow of a gas water heater in an embodiment of the present application;

[0018] Figure 2 Schematic diagram of the operation method flow of a gas water heater in another embodiment of the present application;

[0019] Figure 3 Schematic diagram of the zero cold water start analysis process in an embodiment of the present application;

[0020] Figure 4 Schematic diagram of the hot water faucet start analysis process in an embodiment of the present application;

[0021] Figure 5 Schematic diagram of the operation method flow of a gas water heater in yet another embodiment of the present application;

[0022] Figure 6 Schematic diagram of the structure of the operation device of a gas water heater in an embodiment of the present application;

[0023] Figure 7 Schematic diagram of the structure of the operation device of a gas water heater in another embodiment of the present application;

[0024] Figure 8 Schematic diagram of the structure of the operation device of a gas water heater in yet another embodiment of the present application;

[0025] Figure 9 Schematic diagram of the structure of the operation device of a gas water heater in still another embodiment of the present application;

[0026] Figure 10 Schematic diagram of the structure of a gas water heater in an embodiment of the present application.

[0027] Explanation of the reference numerals: 10 - pressure detector, 20 - controller. Detailed implementation manners

[0028] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant accompanying drawings. The preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present application more thorough and comprehensive.

[0029] The operation method of the gas water heater provided by the embodiment of the present application is applied to a gas water heater, specifically to a gas water heater with a zero-cold water function. Inside the water inlet and / or the water flow pipeline of the zero-cold water gas water heater, a pressure detector is provided. Through the pressure detector, the change of the pipeline water pressure can be detected in real time, so as to analyze the opening of the circulation water pump and the opening of the hot water faucet. After that, the controller of the gas water heater can combine the analysis results to control the gas water heater to automatically enter or exit the zero-cold water mode without manual operation by the user, which can not only improve the operation convenience but also avoid the situation of the hot water being reheated and the water temperature rising.

[0030] Please refer to Figure 1 , the present application provides an operation method of a gas water heater, including step 102, step 104 and step 106.

[0031] Step 102, obtain the real-time pipeline water pressure of the gas water heater.

[0032] Specifically, the real-time pipeline water pressure is also the real-time water pressure of the water flow pipeline of the gas water heater. According to the fluctuation of the water flow and different operating states of the gas water heater, the real-time water pressure will also fluctuate to a certain extent. In an actual scenario, the real-time water pressure at the water inlet of the gas water heater can be used to represent the real-time water pressure of the water flow pipeline. Correspondingly, in the solution of this embodiment, a pressure detector needs to be configured at the water inlet of the gas water heater to detect the real-time pipeline water pressure. In another embodiment, a pressure detector can also be provided inside the water flow pipeline of the gas water heater to detect the real-time pipeline water pressure, and the specific method is not limited.

[0033] For the convenience of understanding the technical solution of the present application, the real-time pipeline water pressure, static pipeline water pressure, etc. mentioned in the following embodiments can all be understood as the water pressure collected at the water inlet of the gas water heater.

[0034] Furthermore, to improve the accuracy of pressure detection, multiple pressure detectors can be set, and the average value of the detection results of each pressure detector can be used as the real-time pipeline water pressure, which can be configured according to the actual scenario.

[0035] Step 104, determine the hot water usage state of the gas water heater according to the real-time pipeline water pressure.

[0036] Specifically, generally, the working states of the gas water heater include an idle state (non-working state, at this time all devices stop running or are in a standby state), a zero-cold water mode, a heating mode (the zero-cold water can be turned on or off simultaneously), etc. The hot water usage state is also the state of whether hot water is used. Generally, when there is a need to use hot water, the hot water faucet of the gas water heater needs to be opened. Therefore, the opening state of the hot water faucet can be used to represent the hot water usage state.

[0037] Step 106, if the hot water faucet is turned on when the gas water heater is in the zero - cold - water mode, the circulating pump of the gas water heater is turned off, and the hot water output is maintained.

[0038] Specifically, the zero - cold - water mode means that the gas water heater turns on the circulating pump to circulate the remaining water in the water flow pipeline to the heat exchanger for heating to maintain the water temperature state. In this case, if it is detected that the hot water faucet is turned on, the gas water heater will enter the heating mode. By turning off the circulating pump, the heated water in the water flow pipeline will not flow back to the heat exchanger for heating, thus preventing the water temperature from rising.

[0039] The above - mentioned gas water heater operation method can determine the hot water usage state of the gas water heater by monitoring the real - time pipeline water pressure. When it is detected that the hot water faucet is turned on in the zero - cold - water mode of the gas water heater, the circulating pump of the gas water heater can be turned off to stop the water circulation. This solution can automatically turn off the circulating pump when the user turns on the hot water faucet to use water, thus avoiding the situation of secondary heating of hot water, alleviating the phenomenon of water temperature rise during the use of the gas water heater, and effectively improving the constant - temperature performance of the gas water heater.

[0040] Please refer to Figure 2 , in one of the embodiments, step 104 includes step 202 and step 204.

[0041] Step 202, obtain the static pipeline water pressure when the gas water heater is in the non - working state.

[0042] Step 204, determine the hot water usage state of the gas water heater according to the real - time pipeline water pressure and the static pipeline water pressure.

[0043] Specifically, the static pipeline water pressure is the water pressure corresponding to the water flow pipeline of the gas water heater when the gas water heater is not turned on and running. Correspondingly, if the pressure detector is set at the water inlet, the static pipeline water pressure is the tap water pressure; if the pressure detector is set inside the water flow pipeline, then the static pipeline water pressure is the water pressure inside the pipeline. When the gas water heater is in the non - working state, the water inside the water flow pipeline is in a static state. In the zero - cold - water mode, since the circulating pump is turned on, the pipeline water pressure will increase. And when the hot water faucet of the gas water heater is turned on, the pressure of the water flow pipeline will decrease.

[0044] That is, whether the zero - cold - water mode is turned on or the hot water faucet is turned on, both will affect the pipeline water pressure. Therefore, this embodiment can combine the real - time pipeline water pressure and the static pipeline water pressure to analyze the hot water usage state of the gas water heater, which has the advantage of high analysis convenience.

[0045] Please refer to Figure 3, in one embodiment, step 204 includes step 302, step 304, and step 306.

[0046] Step 302, obtaining a first water pressure difference between the real-time pipeline water pressure and the static pipeline water pressure.

[0047] Step 304, when the first water pressure difference is greater than or equal to a first preset water pressure threshold, taking the real-time pipeline water pressure in the current state as the zero-cold water pipeline water pressure.

[0048] Step 306, during the operation of the gas water heater in the zero-cold water mode, determining the hot water usage status according to the real-time pipeline water pressure and the zero-cold water pipeline water pressure.

[0049] Specifically, the first water pressure difference refers to the water pressure difference obtained after subtracting the static pipeline water pressure from the real-time pipeline water pressure. In an actual scenario, the opening of the zero-cold water mode will increase the pipeline water pressure. Therefore, by comparing whether the first water pressure difference is greater than a certain threshold (i.e., the preset water pressure threshold), it is determined whether the gas water heater enters the zero-cold water mode. After that, based on the principle that the opening of the hot water faucet will cause the pipeline water pressure to drop, the hot water usage status is determined by combining the real-time pipeline water pressure and the zero-cold water pipeline water pressure.

[0050] In the above solution, by comparing the first water pressure difference between the real-time pipeline water pressure and the static pipeline water pressure with the first preset water pressure threshold, the opening judgment of the zero-cold water mode is realized, which has a high accuracy in judging the zero-cold water mode and can alleviate the influence of measurement errors and the like.

[0051] It can be understood that in other embodiments, the gas water heater can also be considered to enter the zero-cold water mode by monitoring the real-time pipeline water pressure when the pipeline water pressure increases. In other embodiments, a threshold can also be configured, and when the increase in the pipeline water pressure is greater than or equal to the threshold, it is determined that the gas water heater operates in the zero-cold water mode. The specific selection can be combined with the actual situation and will not be limited here.

[0052] Please refer to Figure 4 , in one embodiment, determining the hot water usage status according to the real-time pipeline water pressure and the zero-cold water pipeline water pressure includes step 402 and step 404.

[0053] Step 402, obtaining a second water pressure difference between the zero-cold water pipeline water pressure and the real-time pipeline water pressure.

[0054] Step 404, when the second water pressure difference is greater than or equal to a second preset water pressure threshold, determining that the gas water heater opens the hot water faucet.

[0055] Specifically, the second water pressure difference refers to the water pressure difference obtained by subtracting the real-time pipeline water pressure from the zero-cold water pipeline water pressure. The magnitude of the second preset water pressure threshold is not unique and can be the same as or different from the first preset water pressure threshold, without specific limitation. In an actual scenario, when the hot water faucet is opened, the pipeline water pressure will drop. In the solution of this embodiment, by detecting whether the second water pressure difference is greater than or equal to the second preset water pressure threshold, it is determined whether the hot water faucet is opened. In this way, the influence of measurement errors and the like can be alleviated, and the accuracy of judging the opening of the hot water faucet is relatively high.

[0056] It can be understood that in another embodiment, the real-time pipeline water pressure can also be monitored. When the pipeline water pressure decreases, it is considered that the gas water heater has opened the hot water faucet. In other embodiments, a threshold can also be configured. When the reduction amount of the pipeline water pressure is greater than or equal to this threshold, it is determined that the gas water heater has opened the hot water faucet. It can be specifically selected according to the actual situation and is not limited here.

[0057] Please refer to Figure 5 , in one of the embodiments, after step 106, the method further includes step 502.

[0058] Step 502, when it is determined according to the real-time pipeline water pressure that the hot water faucet is closed, control the circulation pump to start and enter the zero-cold water mode.

[0059] Specifically, after step 106, the gas water heater turns off the circulation pump. At this time, hot water is output to the user only by the way of cold water flowing into the heat exchanger for heating. If it is detected that the hot water faucet is closed, it indicates that the user has finished using water. To ensure that the zero-cold water function can still be realized the next time water is used, when the controller identifies that the hot water faucet is closed according to the real-time pipeline water pressure, the zero-cold water mode can be restarted by controlling the circulation pump to start.

[0060] In this way, through the solution of this embodiment, the gas water heater can temporarily turn off the zero-cold water function when the user uses hot water and restart the zero-cold water function after the user finishes using hot water, which can not only ensure the constant water temperature but also ensure that no cold water is output the next time water is used, improving the operation reliability of the gas water heater.

[0061] In one of the embodiments, the method further includes: if it is determined according to the real-time pipeline water pressure that the pipeline water pressure increases, it is determined that the hot water faucet is closed.

[0062] Specifically, the way for the controller to determine whether the hot water faucet is closed is not unique. As shown in the above embodiment, when the hot water faucet is open, the pipeline water pressure will decrease. Similarly, when the hot water faucet is closed, the pipeline water pressure will increase. In the solution of this embodiment, to avoid adding extra devices and save the cost and volume of the gas water heater, it can directly determine whether the hot water faucet is closed by judging whether the real-time pipeline water pressure increases.

[0063] In other embodiments, a threshold can also be configured to subtract the real-time pipeline water pressure from the pipeline water pressure in the state where the hot water faucet is open and the zero cold water is closed, and determine whether the difference is greater than the set threshold to confirm whether the hot water faucet is closed. The specific method is not limited.

[0064] In another embodiment, it can also be determined whether the hot water faucet is closed by other means, such as water flow rate, etc. The specific method is not limited.

[0065] In one of the embodiments, the method further includes: when receiving a zero cold water off instruction, turning off the circulation pump of the gas water heater; or, when receiving a zero cold water on instruction, turning on the circulation pump of the gas water heater to enter the zero cold water mode.

[0066] Specifically, this embodiment can also configure relevant devices for zero cold water start-stop control for the gas water heater. For example, configure relevant buttons (which can be mechanical buttons or touch buttons) on the surface of the gas water heater, or configure a remote terminal for the gas water heater to send zero cold water on or off instructions through the remote terminal.

[0067] When the gas water heater is in the on state, as long as the gas water heater receives an instruction sent by the user, it can change the zero cold water on mode of the gas water heater according to this instruction. That is, the priority of manual control of zero cold water is higher than the priority of controlling zero cold water according to the real-time pipeline water pressure. For example, when exiting the zero cold water mode according to the real-time pipeline water pressure control, if a zero cold water on instruction is received, regardless of whether the hot water faucet is closed at this time, it can directly enter the zero cold water mode.

[0068] Through this solution, configuring a manual zero cold water control mode with a higher priority for the gas water heater can effectively improve the user experience and the convenience of using the gas water heater.

[0069] In one of the embodiments, the method further includes: when determining that the hot water faucet is closed according to the real-time pipeline water pressure, controlling the circulation pump to turn on to enter the zero cold water mode; when determining that the hot water faucet is open according to the real-time pipeline water pressure, controlling the circulation pump to turn off and maintaining hot water output.

[0070] Specifically, in the solutions of the above embodiments, the identification of whether to turn on the zero - cold water mode is combined with the pipeline water pressure, and the turning on of the zero - cold water mode is achieved by means such as manual opening by the user; after the user finishes using hot water, the turning on of the zero - cold water can be controlled by identifying the pipeline water pressure.

[0071] However, the solution provided in this embodiment realizes the control of the start and stop of the zero - cold water by identifying the pipeline water pressure. Specifically, when it is determined according to the real - time pipeline water pressure that the hot - water faucet is closed, it indicates that the user has no demand for using hot water temporarily at this time. After the controller identifies this state, the zero - cold water mode can be turned on by controlling the circulation pump to start. When it is determined according to the real - time pipeline water pressure that the hot - water faucet is open, it indicates that the user needs to use hot water at this time. After the controller identifies this state, the water circulation can be stopped by controlling the circulation pump to close, avoiding secondary heating of hot water, and thus maintaining the water temperature constant.

[0072] This solution realizes the start - stop control of the zero - cold water by monitoring the real - time pipeline water pressure, without the need for manual control by the user, effectively improving the convenience of using the gas water heater.

[0073] It should be understood that although the steps in the flowcharts involved in the above - mentioned embodiments are shown in sequence according to the arrows, these steps do not necessarily execute in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above - mentioned embodiments may include multiple steps or multiple stages. These steps or stages do not necessarily execute at the same time, but can execute at different times, and the execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0074] Based on the same inventive concept, the embodiments of the present application also provide a gas - water - heater operation device for implementing the gas - water - heater operation method involved above. The solution for solving problems provided by this device is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the gas - water - heater operation device provided below can refer to the limitations on the gas - water - heater operation method in the above text, and will not be repeated here.

[0075] Please refer to Figure 6 , a gas - water - heater operation device, including: a water - pressure acquisition module 602, a state - analysis module 604, and an exit - control module 606.

[0076] The water pressure acquisition module 602 is used to acquire the real-time pipeline water pressure of the gas water heater; the status analysis module 604 is used to determine the hot water usage status of the gas water heater according to the real-time pipeline water pressure; the exit control module 606 is used to turn off the circulation pump of the gas water heater and maintain hot water output if the hot water faucet is turned on when the gas water heater is in the zero-cold water mode.

[0077] In one embodiment, the status analysis module 604 is further configured to acquire the static pipeline water pressure of the gas water heater in the non-working state; and determine the hot water usage status of the gas water heater according to the real-time pipeline water pressure and the static pipeline water pressure.

[0078] In one embodiment, the status analysis module 604 is further configured to acquire a first water pressure difference between the real-time pipeline water pressure and the static pipeline water pressure; in the case where the first water pressure difference is greater than or equal to a first preset water pressure threshold, use the real-time pipeline water pressure in the current state as the zero-cold water pipeline water pressure; and determine the hot water usage status according to the real-time pipeline water pressure and the zero-cold water pipeline water pressure during the operation of the gas water heater in the zero-cold water mode.

[0079] In one embodiment, the status analysis module 604 is further configured to acquire a second water pressure difference between the zero-cold water pipeline water pressure and the real-time pipeline water pressure; and determine that the hot water faucet of the gas water heater is turned on in the case where the second water pressure difference is greater than or equal to a second preset water pressure threshold.

[0080] Please refer to Figure 7 , in one embodiment, the device further includes an opening control module 702.

[0081] The opening control module 702 is configured to control the circulation pump to turn on to enter the zero-cold water mode in the case where it is determined according to the real-time pipeline water pressure that the hot water faucet is closed.

[0082] In one embodiment, the opening control module 702 is further configured to determine that the hot water faucet is closed if it is determined according to the real-time pipeline water pressure that the pipeline water pressure increases.

[0083] Please refer to Figure 8 , in one embodiment, the device further includes a manual control module 802.

[0084] The manual control module 802 is configured to turn off the circulation pump of the gas water heater in the case where a zero-cold water off instruction is received; or turn on the circulation pump of the gas water heater to enter the zero-cold water mode in the case where a zero-cold water on instruction is received.

[0085] Please refer to Figure 9 , in one embodiment, the device further includes an automatic start-stop control module 902.

[0086] The automatic start-stop control module 902 is used to control the circulation pump to start and enter the zero-cold water mode when it is determined that the hot water faucet is closed according to the real-time pipeline water pressure; when it is determined that the hot water faucet is open according to the real-time pipeline water pressure, control the circulation pump to close and maintain the hot water output.

[0087] Each module in the above gas water heater operation device can be implemented in whole or in part by software, hardware and their combination. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0088] For the above gas water heater operation device, the real-time pipeline water pressure of the gas water heater can be monitored to determine the hot water usage status of the gas water heater. When it is detected that the hot water faucet is opened in the zero-cold water mode of the gas water heater, the water circulation can be stopped by closing the circulation pump of the gas water heater. In this solution, when the user opens the hot water faucet to use water, the circulation pump can be automatically closed, thus avoiding the situation of secondary heating of hot water, alleviating the phenomenon of water temperature rise during the use of the gas water heater, and effectively improving the constant temperature performance of the gas water heater.

[0089] Please refer to Figure 10 , this application also provides a gas water heater, including a pressure detector 10 and a controller 20 connected to each other (the connection relationship diagram is not shown). The pressure detector 10 is used to detect the real-time pipeline water pressure, and the controller 20 is used to execute the steps of the above gas water heater operation method.

[0090] Specifically, the gas water heater operation method is as shown in the above various embodiments and the drawings, and will not be elaborated here. For this gas water heater, the real-time pipeline water pressure of the gas water heater can be monitored to determine the hot water usage status of the gas water heater. When it is detected that the hot water faucet is opened in the zero-cold water mode of the gas water heater, the water circulation can be stopped by closing the circulation pump of the gas water heater. In this solution, when the user opens the hot water faucet to use water, the circulation pump can be automatically closed, thus avoiding the situation of secondary heating of hot water, alleviating the phenomenon of water temperature rise during the use of the gas water heater, and effectively improving the constant temperature performance of the gas water heater.

[0091] In one of the embodiments, the pressure detector 10 is arranged at the water inlet of the gas water heater (please refer to Figure 10 ), and / or, the pressure detector 10 is arranged inside the water flow pipeline of the gas water heater.

[0092] Specifically, in an actual scenario, the real-time water pressure at the water inlet of the gas water heater can be used to represent the real-time water pressure of the water flow pipeline. Correspondingly, in the solution of this embodiment, a pressure detector 10 needs to be configured at the water inlet of the gas water heater to detect the real-time pipeline water pressure. In this way, the configuration of the pressure detector 10 is relatively simple, and it is convenient for inspection and replacement in case of failure.

[0093] In another embodiment, the pressure detector 10 can also be arranged inside the water flow pipeline of the gas water heater to detect the real-time pipeline water pressure. In this way, it has higher detection accuracy.

[0094] In an actual scenario, one or both of the above methods can be used to set the pressure detector 10, and the specific selection can be made in combination with actual requirements. When configuring the pressure detector 10 in two ways, the average value of the detection results of the two detectors can be used to determine the final real-time pipeline water pressure, and the specific method is not limited.

[0095] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0096] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method for operating a gas water heater, characterized in that Including: Obtain the real-time pipeline water pressure of the gas water heater; Determine the hot water usage status of the gas water heater according to the real-time pipeline water pressure; If the hot water faucet is turned on when the gas water heater is in the zero-cold water mode, turn off the circulating water pump of the gas water heater and maintain the hot water output.

2. The operating method of the gas water heater according to claim 1, characterized in that, The determining the hot water usage status of the gas water heater according to the real-time pipeline water pressure includes: Obtain the static pipeline water pressure of the gas water heater in the non-working state; Determine the hot water usage status of the gas water heater according to the real-time pipeline water pressure and the static pipeline water pressure.

3. The operating method of the gas water heater according to claim 2, characterized in that The determining the hot water usage status of the gas water heater according to the real-time pipeline water pressure and the static pipeline water pressure includes: Obtain the first water pressure difference between the real-time pipeline water pressure and the static pipeline water pressure; When the first water pressure difference is greater than or equal to the first preset water pressure threshold, use the real-time pipeline water pressure in the current state as the zero-cold water pipeline water pressure; During the operation of the gas water heater in the zero-cold water mode, determine the hot water usage status according to the real-time pipeline water pressure and the zero-cold water pipeline water pressure.

4. The method for operating a gas water heater according to claim 3, wherein The determining the hot water usage status according to the real-time pipeline water pressure and the zero-cold water pipeline water pressure includes: Obtain the second water pressure difference between the zero-cold water pipeline water pressure and the real-time pipeline water pressure; When the second water pressure difference is greater than or equal to the second preset water pressure threshold, determine that the hot water faucet of the gas water heater is turned on.

5. The operation method of the gas water heater according to any one of claims 1-4, characterized in that After the step of turning off the circulating water pump of the gas water heater and maintaining the hot water output if the hot water faucet is turned on when the gas water heater is in the zero-cold water mode, the method further includes: When it is determined according to the real-time pipeline water pressure that the hot water faucet is closed, control the circulating water pump to turn on to enter the zero-cold water mode.

6. The method for operating a gas water heater according to claim 5, wherein The method further includes: If it is determined according to the real-time pipeline water pressure that the pipeline water pressure increases, determine that the hot water faucet is closed.

7. The operating method of the gas water heater according to any one of claims 1-4, characterized in that The method further includes: When receiving a zero-cold water off command, turn off the circulating water pump of the gas water heater; or, When receiving a zero-cold water on command, turn on the circulating water pump of the gas water heater to enter the zero-cold water mode.

8. The operating method of the gas water heater according to claim 1, characterized in that After obtaining the real-time pipeline water pressure of the gas water heater, the method further includes: When it is determined according to the real-time pipeline water pressure that the hot water faucet is closed, control the circulating water pump to turn on to enter the zero-cold water mode; When it is determined according to the real-time pipeline water pressure that the hot water faucet is turned on, control the circulating water pump to turn off and maintain the hot water output.

9. A gas water heater operating device, characterized in that, Including: A water pressure acquisition module for obtaining the real-time pipeline water pressure of the gas water heater; A status analysis module for determining the hot water usage status of the gas water heater according to the real-time pipeline water pressure; An exit control module for turning off the circulating water pump of the gas water heater and maintaining the hot water output if the hot water faucet is turned on when the gas water heater is in the zero-cold water mode.

10. A gas water heater, characterized in that, Including a connected pressure detector and a controller, the pressure detector is used to detect the real-time pipeline water pressure, and the controller is used to execute the steps of the gas water heater operation method according to any one of claims 1-8.

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