Hot water supply system and control method thereof

Abstract

According to the hot water supply system and the control method thereof, when it is determined that a hot water circulation loop is in an open mode for supplying water to a water using device, if it is determined that a hot water circulation water pump is in an open state, the hot water circulation water pump is controlled to maintain the open state, and if it is determined that the hot water circulation water pump is not in the open state; if the hot water circulation loop is in the open mode, the hot water circulation water pump is controlled to be in the open state, namely, when the hot water circulation loop is determined to be in the open mode, the hot water circulation water pump can be controlled to be in the open state all the time, then the pressurization function is achieved, it is ensured that a water using end user can obtain high-water-pressure hot water at any time, and the requirement of the user for hot water is met.

Description

Technical Field

[0001] This application relates to the technical field of hot water circulation, and particularly to a hot water supply system and a control method thereof. Background Art

[0002] A hot water supply system can provide hot water for users. In an existing hot water supply system, if a user turns on the circulating heating function of the hot water supply system, the water pump can be triggered to turn on, and the water in the hot water supply system is heated. If it is monitored that the water temperature in the hot water supply system reaches the standard, the water pump will be automatically triggered to turn off. At this time, even if the faucet is turned on, the pump will not run again. Therefore, if the user turns on the faucet to use water at this time, the water pressure may not meet the user's needs. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a hot water supply system and a control method thereof to solve the above technical problems.

[0004] On the one hand, a control method of a hot water supply system is provided, which is applied to a hot water supply system. The hot water supply system includes a hot water circulation loop and a water-using device connected to the water outlet end of the hot water circulation loop. The hot water circulation loop includes a hot water circulation pipeline and a hot water circulator arranged on the hot water circulation pipeline. The hot water circulator includes a hot water circulation water pump. The control method includes:

[0005] When it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device, if it is determined that the hot water circulation water pump is in an on state, control the hot water circulation water pump to maintain the on state. If it is determined that the hot water circulation water pump is not in an on state, control the hot water circulation water pump to turn on and then maintain the on state.

[0006] In one embodiment, the hot water circulator further includes a temperature sensor arranged on the hot water circulation pipeline. The control method further includes:

[0007] When it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor to reach a preset temperature threshold, control the hot water circulation water pump to turn off when the hot water circulation water pump is in an on state.

[0008] In one embodiment, the hot water circulation loop further includes a heating device arranged on the hot water circulation pipeline. The control method further includes:

[0009] When it is determined that the hot water circulation loop is in a closed mode without supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline detected by the temperature sensor does not reach the preset temperature threshold, the liquid in the hot water circulation pipeline is heated by the heating device, and when the hot water circulation pump is in an open state, the hot water circulation pump is controlled to maintain the open state until the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold, and then the hot water circulation pump and the heating device are controlled to be turned off.

[0010] In one embodiment, the hot water circulator further includes a water flow sensor disposed on the hot water circulation pipeline. Determining that the hot water circulation loop is in an open mode of supplying water to the water-using device includes:

[0011] When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is greater than the preset closed-loop standard flow rate threshold, it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device;

[0012] Determining that the hot water circulation loop is in a closed mode without supplying water to the water-using device includes:

[0013] When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is equal to the closed-loop standard flow rate threshold, it is determined that the hot water circulation loop is in a closed mode without supplying water to the water-using device.

[0014] In one embodiment, the method further includes:

[0015] When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is less than the closed-loop standard flow rate threshold, a hot water circulation pump failure prompt is given.

[0016] In one embodiment, before determining that the hot water circulation loop is in an open mode of supplying water to the water-using device, the method includes:

[0017] When it is determined that the hot water circulation loop meets the preset hot water circulation pump opening condition, the hot water circulation pump is controlled to be turned on.

[0018] In one embodiment, determining that the hot water circulation loop meets the preset hot water circulation pump opening condition includes:

[0019] When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is greater than or equal to the preset pump opening flow rate threshold and the hot water circulation pump is currently in a closed state, it is determined that the hot water circulation loop meets the preset hot water circulation pump opening condition; the pump opening flow rate threshold is less than the closed-loop standard flow rate threshold;

[0020] Or,

[0021] When it is monitored by the water flow sensor that the flow rate of the liquid in the hot water circulation pipeline continuously increases within a preset continuous time period and the hot water circulation pump is currently in the off state, it is determined that the hot water circulation loop meets the preset hot water circulation pump start condition.

[0022] In one embodiment, before it is monitored by the water flow sensor that the current flow rate of the hot water circulation loop is greater than the preset closed-loop standard flow rate threshold, the method includes:

[0023] Step 1: When the hot water supply system is running, record the current rotational speed N of the hot water circulation pump;

[0024] Step 2: Record the current flow rate Q of the liquid in the hot water circulation pipeline;

[0025] Step 3: When controlling the rotational speed of the hot water circulation pump to become MN, determine whether the flow rate of the liquid in the hot water circulation pipeline becomes MQ. If so, go to Step 4; if not, go to Step 5;

[0026] Step 4: Set the flow rate Q as the closed-loop standard flow rate threshold of the hot water supply system;

[0027] Step 5: After controlling the hot water circulation pump to run at the rotational speed N for a preset time period, go back to Step 2 again.

[0028] On the other hand, a hot water supply system is provided, including a controller, a hot water circulation loop, and a water-using device connected to the water outlet end of the hot water circulation loop;

[0029] The hot water circulation loop includes a hot water circulation pipeline and a hot water circulator arranged on the hot water circulation pipeline, and the hot water circulator includes a hot water circulation pump;

[0030] The controller is used for when it is determined that the hot water circulation loop is in the open mode of supplying water to the water-using device, if it is determined that the hot water circulation pump is in the on state, control the hot water circulation pump to maintain the on state; if it is determined that the hot water circulation pump is not in the on state, control the hot water circulation pump to start and then maintain the on state.

[0031] In one embodiment, the hot water circulator further includes a temperature sensor arranged on the hot water circulation pipeline;

[0032] The controller is further configured to, when determining that the hot water circulation loop is in a closed mode without supplying water to the water-using device, if it is detected by the temperature sensor that the temperature of the liquid in the hot water circulation pipeline reaches a preset temperature threshold, control to turn off the hot water circulation pump when the hot water circulation pump is in an on state.

[0033] Through the hot water supply system and its control method provided by the present application, when it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device, if it is determined that the hot water circulation pump is in an on state, the hot water circulation pump is controlled to maintain the on state; if it is determined that the hot water circulation pump is not in an on state, the hot water circulation pump is controlled to be turned on and then maintained in the on state. That is, when it is determined that the hot water circulation loop is in an open mode, the hot water circulation pump can be controlled to be always in an on state, thereby achieving a pressurization function, ensuring that the user at the water-using end can always obtain hot water with high water pressure, and meeting the user's demand for hot water. Description of the Drawings

[0034] Figure 1 is a structural block diagram of the hot water supply system provided by an embodiment of the present application;

[0035] Figure 2 is a structural schematic diagram of the hot water circulator provided by an embodiment of the present application;

[0036] Figure 3 is a schematic flow diagram of setting a closed-loop standard flow rate threshold provided by an embodiment of the present application;

[0037] Figure 4 is a schematic flow diagram of the control method of the hot water supply system provided by an embodiment of the present application. Detailed Embodiments

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] A hot water circulator is a device used in a hot water supply system. Its main function is to send hot water back to the supply system through circulation to reduce the waiting time for hot water of users, improve the convenience and comfort of life, and achieve the purpose of saving water. If all faucets in the hot water circulation loop of the hot water supply system are closed, indicating that the hot water circulation loop is not supplying water to the water-using device, then it is considered that the hot water circulation loop is in a closed mode; if a faucet is opened, indicating that the hot water circulation loop is in a state of supplying water to the water-using device, then it is said that the hot water circulation loop is in an open mode.

[0040] The principle of providing hot water in the existing hot water supply system is: in a closed mode, the hot water circulator is operated to fill the entire hot water circulation loop with hot water, ensuring that hot water can be provided immediately when the user uses water. When the user starts the hot water circulator, the real-time temperature of the water flow can be detected. If the set temperature is not reached, the hot water circulation pump in the hot water circulator will be controlled to continue to run until the set temperature is reached, and the hot water circulation pump in the hot water circulator will be controlled to stop running.

[0041] The existing hot water supply system has the following working scenarios:

[0042] In the first case, when the user turns on the hot water circulator in the hot water supply system, if it is in closed mode, the hot water circulation pump will continue to run until the water temperature reaches the standard and then stop running.

[0043] In the second case, if the user turns on the single-cycle heating function of the hot water circulator, the hot water circulation pump will continue to run until the water temperature reaches the standard and then stop running. At this time, even if the faucet is turned on, the hot water circulation pump will no longer run.

[0044] In the third case, if the user turns on the single-cycle heating function of the hot water circulator, the hot water circulation pump continues to run. When the faucet is turned on when the water temperature has not yet reached the standard, the water temperature will drop sharply and will not reach the standard. At this time, the hot water circulation pump will continue to run and play a pressurization function. However, the user needs to grasp the opportunity, that is, turn on the hot water circulation pump in the hot water supply system, and turn on the faucet when the water temperature does not reach the standard, in order to realize the pressurization function.

[0045] In the fourth case, the water temperature can be detected within the set time period through the timing function. As long as the water temperature does not meet the standard, the hot water circulation pump will be turned on, and when the temperature meets the standard, the hot water circulation pump will be turned off. On the one hand, it can ensure that there is hot water in the hot water circulation loop at all times. On the other hand, when the user turns on the faucet, the temperature drops sharply and the hot water circulation pump starts to run. At this time, the hot water circulation pump also plays a pressurizing role. The problem this brings is that the hot water circulation pump will be frequently turned on or off within the set time period. If the set time period is all day, the power consumption will increase greatly.

[0046] Therefore, traditional hot water supply systems usually have the following problems: the water pump is designed mainly to provide water circulation function for closed systems, and does not take into account the pressurization function in open systems. Even if the pressurization function can be achieved, the conditions are very harsh. Either the user needs to turn on the faucet when the water pump is turned on and the temperature is not up to standard to achieve pressurization; or use a long-term timing function to consume a huge amount of electricity in exchange for the pressurization function.

[0047] In view of this, an embodiment of the present application provides a control method for a hot water supply system, which is applied to a hot water supply system. The hot water supply system includes a hot water circulation loop and a water-using device connected to the water outlet end of the hot water circulation loop; the hot water circulation loop includes a hot water circulation pipeline and a hot water circulator provided on the hot water circulation pipeline, and the hot water circulator includes a hot water circulation pump; through the hot water circulation pump, the circulating supply of hot water can be realized, and the water-using device refers to a water outlet device that users can directly use, such as a faucet.

[0048] The control method in the embodiment of the present application includes:

[0049] When it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device, if it is determined that the hot water circulation pump is in an on state, then control the hot water circulation pump to maintain the on state; if it is determined that the hot water circulation pump is not in an on state, then control the hot water circulation pump to be turned on and then maintain the on state.

[0050] Therefore, through the control method provided by the embodiment of the present application, when the hot water circulation loop is in an open mode, it can ensure that the hot water circulation pump is always in an on state, and thus it can ensure that users can obtain hot water with high water pressure at any time.

[0051] The hot water circulator in the embodiment of the present application may further include a temperature sensor provided on the hot water circulation pipeline, and the control method includes:

[0052] When it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor to reach a preset temperature threshold, then control to turn off the hot water circulation pump when the hot water circulation pump is in an on state. Of course, in some other embodiments, when it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor to reach a preset temperature threshold and the hot water circulation pump is in a closed state at this time, then just maintain the hot water circulation pump in a closed state.

[0053] It should be noted that the preset temperature threshold in the embodiment of the present application can be arbitrarily set by developers or can be user-defined.

[0054] Please refer to Figure 1 As shown, in addition to including the hot water circulator 11, the hot water circulation loop may further include a heating device 12 provided on the hot water circulation pipeline. At this time, the control method further includes:

[0055] When it is determined that the hot water circulation loop is in a closed mode without supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor and does not reach the preset temperature threshold, the liquid in the hot water circulation pipeline is heated by the heating device, and when the hot water circulation pump is in the on state, the hot water circulation pump is controlled to maintain the on state until the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold, then the hot water circulation pump and the heating device are controlled to be turned off. Of course, in some other embodiments, if the hot water circulation pump is in the off state when the liquid in the hot water circulation pipeline is heated by the heating device, the hot water circulation pump should be turned on first, and then the hot water circulation pump is maintained in the on state until the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold.

[0056] A check valve 13 can also be provided on the hot water circulation loop to ensure that the liquid in the hot water circulation pipeline can only flow in one direction. It should be noted that when a heating device 12 is provided in the hot water circulation loop, the hot water supply system can also include a cold water pipeline connected to the water inlet end of the hot water circulation loop. Through this cold water pipeline, cold water flows into the hot water circulation pipeline and is heated by the heating device 12 and then becomes hot water and is provided to users through the water-using device 14.

[0057] It should be noted that in some other embodiments, the heating device 12 can be provided outside the hot water circulation loop. Specifically, the hot water supply system can include a hot water pipeline connected to the water inlet end of the hot water circulation loop. The water inlet end of the hot water pipeline is connected to the cold water pipeline. The heating device can be provided on the hot water pipeline. Cold water flows through the cold water pipeline into the hot water pipeline and is heated by the heating device of the hot water pipeline and then flows into the hot water circulation loop.

[0058] Please refer to Figure 2 As shown, in addition to including a temperature sensor 21 and a hot water circulation pump 22, the hot water circulator 11 can also include a water flow sensor 23. The water flow sensor 23 is used to obtain real-time flow rate information. The hot water circulator 11 can also include a controller 24. The controller 24 can be used to control the opening or closing of the hot water circulation pump 22. At this time,

[0059] Determining that the hot water circulation loop is in an open mode of supplying water to the water-using device includes:

[0060] When it is monitored by the water flow sensor that the current flow rate of the liquid in the hot water circulation pipeline is greater than the preset closed-loop standard flow rate threshold, it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device;

[0061] Determining that the hot water circulation loop is in a closed mode without supplying water to the water-using device includes:

[0062] When it is detected by the water flow sensor that the current flow rate of the liquid in the hot water circulation pipeline is equal to the closed-loop standard flow rate threshold, it is determined that the hot water circulation loop is in the closed-loop mode without supplying water to the water-using device.

[0063] The closed-loop standard flow rate threshold in the embodiments of the present application refers to the stable flow rate of the liquid in the hot water circulation pipeline when the hot water circulation loop is in the closed-loop mode. In the embodiments of the present application, the closed-loop standard flow rate threshold of the hot water circulation loop can be determined in the following manner.

[0064] Specifically, please refer to Figure 3 As shown, before using the closed-loop standard flow rate threshold to determine the mode of the hot water circulation loop, the following steps can be included.

[0065] S31: When the hot water supply system is running, record the current rotation speed N of the hot water circulation pump.

[0066] S32: Record the current flow rate Q of the liquid in the hot water circulation pipeline.

[0067] S33: When the rotation speed of the hot water circulation pump is changed to MN, determine whether the flow rate of the liquid in the hot water circulation pipeline becomes MQ. If so, go to S34; if not, go to S35.

[0068] S34: Set the flow rate Q as the closed-loop standard flow rate threshold of the hot water supply system.

[0069] S35: Control the hot water circulation pump to run at the rotation speed N for a preset duration, and then go back to S32 again.

[0070] It can be understood that after the hot water supply system is installed, the hot water supply system can be initialized, and the initialization process is the process of executing the above steps S31 to S35.

[0071] Specifically, in steps S31 and S32, when the customer first runs the hot water supply system, the controller in the hot water supply system automatically records the current rotation speed N of the hot water circulation pump and the current flow rate Q of the liquid in the hot water circulation pipeline at this time. Of course, it can also be recorded by the user independently.

[0072] In step S33, the controller controls the rotational speed of the hot water circulation pump to become MN, and determines whether the flow rate of the liquid in the hot water circulation pipeline becomes MQ at this time. If not, it proves that the hot water circulation loop is in the open mode at this time, or there is some gas in the hot water circulation loop. At this time, the controller can control the hot water circulation pump to operate at the rotational speed N for a preset duration, and then re-obtain the current flow rate Q of the liquid in the hot water circulation pipeline. It should be noted that the flow rate Q obtained here is usually not equal to the flow rate Q obtained last time. For the convenience of distinction, the current flow rate of the liquid in the hot water circulation pipeline re-obtained here is denoted as Q'. Then the controller controls the rotational speed of the hot water circulation pump to become MN again, and determines whether the flow rate in the hot water circulation pipeline becomes MQ' at this time. If not, continue to loop until the controller controls the hot water circulation pump to become MN and the flow rate in the hot water circulation loop also becomes MQ', which proves that the hot water circulation loop is in the closed mode at this time. The latest obtained flow rate Q' of the liquid in the hot water circulation loop is the closed standard flow rate threshold.

[0073] It should be noted that the preset duration in step S35 can be flexibly set by the developer or supported for user setting. For example, it can be set to 1 minute. Similarly, the value of M can be flexibly set by the developer or supported for user setting. For example, it can be set to 1 / 3, 1 / 4, etc. Preferably, it can be set to 1 / 2, that is, control the rotational speed to become half of the initial rotational speed in step S33 for better control.

[0074] In the embodiment of the present application, when it is monitored by the water flow sensor that the current flow rate of the liquid in the hot water circulation pipeline is less than the closed standard flow rate threshold, it indicates that the hot water circulation pump may have a fault at this time, and a hot water circulation pump fault prompt can be given at this time.

[0075] When the hot water circulation loop is in the closed mode, the start and stop of the hot water circulation pump can be controlled according to the temperature sensor to ensure that the hot water circulation pump is turned off after the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold.

[0076] When the hot water circulation loop is in the open mode, regardless of the temperature of the liquid in the hot water circulation pipeline, the hot water circulation pump continuously operates to provide a pressurization function until the flow rate of the liquid in the hot water circulation pipeline is equal to the preset closed standard flow rate threshold, and then the hot water circulation loop switches to the closed mode, and the hot water circulation pump is turned off after the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold.

[0077] It should be noted that in the first embodiment, after determining which mode the hot water circulation loop is in, the hot water circulation pump can be turned on as needed. For example, if it is determined that the hot water circulation loop is in the open mode, when the hot water circulation pump is in the off state, the hot water circulation pump can be turned on first, and then during the process of the hot water circulation loop being in the open mode, the hot water circulation pump is maintained in the on state.

[0078] In the second embodiment, after controlling the hot water circulation pump to be turned on, it can be further determined which mode the hot water circulation loop is in. If it is determined that the hot water circulation loop is in the open mode, the on state of the hot water circulation pump is maintained; if it is determined that the hot water circulation loop is in the closed mode, it is determined whether the temperature of the liquid in the hot water circulation pipeline reaches a preset temperature threshold. If so, the hot water circulation pump is turned off; if not, the hot water circulation pump is maintained in the on state until the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold.

[0079] In this embodiment, when it is determined that the hot water circulation loop meets the preset hot water circulation pump turning-on condition, the hot water circulation pump is controlled to be turned on. Among them, the hot water circulation pump turning-on condition can be arbitrarily set by the developer. Exemplarily, determining that the hot water circulation loop meets the preset hot water circulation pump turning-on condition includes:

[0080] When it is monitored by the water flow sensor that the current flow rate of the liquid in the hot water circulation pipeline is greater than or equal to the preset pump turning-on flow rate threshold and the hot water circulation pump is currently in the off state, it is determined that the hot water circulation loop meets the preset hot water circulation pump turning-on condition; among them, the pump turning-on flow rate threshold is less than the closed-loop standard flow rate threshold, so as to ensure that after controlling the hot water circulation pump to be turned on, it is further determined which mode the hot water circulation loop is in;

[0081] Or,

[0082] When it is monitored by the water flow sensor that the flow rate of the liquid in the hot water circulation pipeline continuously increases within a preset continuous time period and the hot water circulation pump is currently in the off state, it is determined that the hot water circulation loop meets the preset hot water circulation pump turning-on condition.

[0083] For better implementation, a specific example is provided below for illustration. Please refer to Figure 4 As shown, the control method of the hot water supply system may include the following steps:

[0084] S41: When it is determined that the hot water circulation loop meets the preset hot water circulation pump turning-on condition, turn on the hot water circulation pump.

[0085] S42: Determine whether the current flow rate of the liquid in the hot water circulation pipeline is greater than the preset closed-loop standard flow rate threshold. If so, go to S43; if not, go to S44.

[0086] S43: Determine that the hot water circulation loop is currently in the open mode, and maintain the hot water circulation pump in the on state.

[0087] S44: Judge whether the current flow rate of the liquid in the hot water circulation pipeline is equal to the preset closed-loop standard flow rate threshold. If so, go to S45; if not, go to S49.

[0088] S45: Determine that the hot water circulation loop is currently in the closed mode.

[0089] S46: Judge whether the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold. If so, go to S47; if not, go to S48.

[0090] S47: Control to turn off the hot water circulation pump

[0091] S48: Maintain the operation of the hot water circulation pump and control the heating device to heat.

[0092] S49: Give a fault prompt for the hot water circulation pump.

[0093] The embodiment of the present application also provides a hot water supply system, including a controller, a hot water circulation loop, and a water-using device connected to the water outlet end of the hot water circulation loop; the hot water circulation loop includes a hot water circulation pipeline and a hot water circulator arranged on the hot water circulation pipeline, and the hot water circulator includes a hot water circulation pump; the controller is used for when determining that the hot water circulation loop is in the open mode of supplying water to the water-using device, if it is determined that the hot water circulation pump is in the on state, then control the hot water circulation pump to maintain the on state, and if it is determined that the hot water circulation pump is not in the on state, then control the hot water circulation pump to be turned on and then maintain the on state.

[0094] Exemplarily, the hot water circulator further includes a temperature sensor arranged on the hot water circulation pipeline; the controller is further used for when determining that the hot water circulation loop is in the closed mode of not supplying water to the water-using device, if it is detected through the temperature sensor that the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold, then control to turn off the hot water circulation pump when the hot water circulation pump is in the on state.

[0095] It should be noted that the controller can be arranged in the hot water circulator, that is, as Figure 2As shown, of course, the controller can also be arranged outside the hot water circulator. Of course, in some embodiments, the controller includes a main controller arranged outside the hot water circulator and a sub - controller arranged inside the hot water circulator. At this time, when the main controller determines that the hot water circulation loop is in the open - mode of supplying water to the water - using device, if it determines that the hot water circulation pump is in the on state, it controls the hot water circulation pump to maintain the on state through the sub - controller. If the main controller determines that the hot water circulation pump is not in the on state, it controls the hot water circulation pump to be turned on and then maintain the on state through the sub - controller.

[0096] The hot water supply system and its control method provided by the embodiments of the present application can enable the hot water circulator to accurately determine the current mode of the system without relying on traditional water - flow detection methods, and perform intelligent control as needed, enhancing the reliability and user experience of the hot water supply system. At the same time, it improves the applicability of the hot water circulator, enabling the hot water circulator to have the function of boosting pressure on the basis of the hot water circulation function, ensuring that users can always obtain hot water with high water pressure.

[0097] In addition, by introducing the intelligent boosting mode, the hot water supply system can provide the boosting function more flexibly, conveniently and reliably in the open mode without relying on manual operation by users or specific time arrangements.

[0098] Intelligent control helps to reduce the power consumption of the hot water supply system because the hot water circulator only runs the hot water circulation pump when necessary, rather than working continuously throughout the entire period, saving expenses and being more environmentally friendly.

[0099] It should be understood that although the steps in the above - mentioned flowchart are shown in sequence according to the arrows, these steps are not necessarily executed 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 some of the steps in the above - mentioned flowchart may include multiple sub - steps or multiple stages. These sub - steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and the execution order of these sub - steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub - steps or stages of other steps.

[0100] It should be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the layout type of the components may also be more complex. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0101] The technical features of the above 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 within the scope described in this specification.

[0102] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. 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 control method for a hot water supply system, characterized in that, it is applied to a hot water supply system, the hot water supply system includes a hot water circulation loop and a water-using device connected to the water outlet end of the hot water circulation loop; the hot water circulation loop includes a hot water circulation pipeline and a hot water circulator arranged on the hot water circulation pipeline, and the hot water circulator includes a hot water circulation water pump; the control method includes: When it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device, if it is determined that the hot water circulation water pump is in an on state, then control the hot water circulation water pump to maintain the on state, and if it is determined that the hot water circulation water pump is not in an on state, then control the hot water circulation water pump to be turned on and then maintain the on state.

2. The control method for a hot water supply system according to claim 1, characterized in that, the hot water circulator further includes a temperature sensor arranged on the hot water circulation pipeline, and the control method further includes: When it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor to reach a preset temperature threshold, then control to turn off the hot water circulation water pump when the hot water circulation water pump is in an on state.

3. The control method for a hot water supply system according to claim 2, characterized in that, the hot water circulation loop further includes a heating device arranged on the hot water circulation pipeline, and the control method further includes: When it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device, if the temperature of the liquid in the hot water circulation pipeline is detected by the temperature sensor not to reach the preset temperature threshold, then heat the liquid in the hot water circulation pipeline through the heating device, and control the hot water circulation water pump to maintain the on state when the hot water circulation water pump is in an on state, until the temperature of the liquid in the hot water circulation pipeline reaches the preset temperature threshold, then control to turn off the hot water circulation water pump and the heating device.

4. The control method for a hot water supply system according to claim 2, characterized in that, the hot water circulator further includes a water flow sensor arranged on the hot water circulation pipeline, and determining that the hot water circulation loop is in an open mode of supplying water to the water-using device includes: When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is greater than a preset closed-mode standard flow rate threshold, it is determined that the hot water circulation loop is in an open mode of supplying water to the water-using device; Determining that the hot water circulation loop is in a closed mode of not supplying water to the water-using device includes: When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is equal to the closed-mode standard flow rate threshold, it is determined that the hot water circulation loop is in a closed mode of not supplying water to the water-using device.

5. The control method for a hot water supply system according to claim 4, characterized in that, the method further includes: When the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is less than the closed standard flow rate threshold, a fault prompt for the hot water circulation pump is given.

6. The control method of the hot water supply system according to claim 4, wherein, before determining that the hot water circulation loop is in the open mode of supplying water to the water using device, the method includes: when it is determined that the hot water circulation loop meets the preset hot water circulation pump start condition, controlling to start the hot water circulation pump.

7. The control method of the hot water supply system according to claim 6, wherein, determining that the hot water circulation loop meets the preset hot water circulation pump start condition includes: when the current flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor is greater than or equal to the preset pump start flow rate threshold and the hot water circulation pump is currently in the closed state, determining that the hot water circulation loop meets the preset hot water circulation pump start condition; the pump start flow rate threshold is less than the closed standard flow rate threshold; or, when the flow rate of the liquid in the hot water circulation pipeline monitored by the water flow sensor continuously increases within a preset continuous time period and the hot water circulation pump is currently in the closed state, determining that the hot water circulation loop meets the preset hot water circulation pump start condition.

8. The control method of the hot water supply system according to claim 4, wherein, before the current flow rate of the hot water circulation loop monitored by the water flow sensor is greater than the preset closed standard flow rate threshold, the method includes: Step 1: When the hot water supply system is running, record the current rotation speed N of the hot water circulation pump; Step 2: Record the current flow rate Q of the liquid in the hot water circulation pipeline; Step 3: When controlling the rotation speed of the hot water circulation pump to become MN, judge whether the flow rate of the liquid in the hot water circulation pipeline becomes MQ. If so, go to Step 4; if not, go to Step 5; Step 4: Set the flow rate Q as the closed standard flow rate threshold of the hot water supply system; Step 5: Control the hot water circulation pump to run at the rotation speed N for a preset time period, and then go back to Step 2 again.

9. A hot water supply system, wherein, it includes a controller, a hot water circulation loop, and a water using device connected to the water outlet end of the hot water circulation loop; the hot water circulation loop includes a hot water circulation pipeline and a hot water circulator arranged on the hot water circulation pipeline, and the hot water circulator includes a hot water circulation pump; the controller is used to, when determining that the hot water circulation loop is in the open mode of supplying water to the water using device, if it is determined that the hot water circulation pump is in the open state, control the hot water circulation pump to maintain the open state, and if it is determined that the hot water circulation pump is not in the open state, control the hot water circulation pump to start and then maintain the open state.

10. The hot water supply system according to claim 9, wherein, the hot water circulator further includes a temperature sensor arranged on the hot water circulation pipeline; The controller is further configured to, when determining that the hot water circulation loop is in a closed mode where water is not supplied to the water-using device, if it is detected by the temperature sensor that the temperature of the liquid in the hot water circulation pipeline reaches a preset temperature threshold, control to turn off the hot water circulation pump when the hot water circulation pump is in an on state.

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