Control method and device of parallel water consumption system and parallel water consumption system

Abstract

The invention belongs to the technical field of electric appliances, and particularly relates to a control method and device of a parallel water using system and the parallel water using system.The parallel water using system comprises a solar water heater, a gas water heater and at least one water using terminal, and a water outlet of the solar water heater and a water outlet of the gas water heater both communicate with a water inlet of the water using terminal; the control method comprises the steps that if the outlet water temperature of the solar water heater is larger than a first preset threshold value, the solar water heater is controlled to supply water to a water terminal; if the water outlet temperature is smaller than or equal to the first preset threshold value, the gas water heater is controlled to supply water to the water terminal; and if the solar water heater supplies water to the water consumption terminal before the gas water heater is controlled to supply water to the water consumption terminal, early warning is performed before the gas water heater is switched to supply water, so that automatic switching between the gas water heater and the solar water heater is realized, and the use comfort and convenience of a user are improved.

Description

Technical Field

[0001] This application belongs to the technical field of electrical appliances, and particularly relates to a control method, device and parallel water use system for a parallel water use system. Background Art

[0002] Currently, many users install both a solar water heater and a gas water heater at home. Generally, when the water temperature of the solar water heater reaches the water use temperature, the user will choose to open the valve of the solar water heater and close the valve of the gas water heater, and supply hot water through the solar water heater. When the water temperature of the solar water heater does not reach the water use temperature, the user will choose to close the valve of the solar water heater and instead open the valve of the gas water heater to supply hot water through the gas water heater.

[0003] Currently, the valves of the solar water heater and the gas water heater are generally independently set. When the user uses hot water, the user needs to operate the valves of the solar water heater and the gas water heater separately, which is relatively inconvenient to use. Summary of the Invention

[0004] This application provides a control method, device and parallel water use system for a parallel water use system to solve the problem that when the user uses hot water, the valves of the solar water heater and the gas water heater need to be operated separately, which is relatively inconvenient to use.

[0005] In the first aspect of the embodiments of this application, a control method for a parallel water use system is provided. The parallel water use system includes a solar water heater, a gas water heater and at least one water use terminal. The water outlet of the solar water heater and the water outlet of the gas water heater are both communicated with the water inlet of the water use terminal. The control method includes:

[0006] If the water outlet temperature of the solar water heater is greater than a first preset threshold, then control the solar water heater to supply water to the water use terminal;

[0007] If the water outlet temperature is less than or equal to the first preset threshold, then control the gas water heater to supply water to the water use terminal;

[0008] Wherein, if the solar water heater supplies water to the water use terminal before controlling the gas water heater to supply water to the water use terminal, a warning is given before switching to the gas water heater to supply water.

[0009] In a possible design, the warning is given before switching to the gas water heater to supply water, including:

[0010] Control at least one of the water temperature and flow rate of the water outlet flow of the water-using terminal to continuously perform multiple transformations that can be sensed by the human body within a preset time threshold, wherein both the water temperature and flow rate of the water outlet flow are transformed within a preset warning threshold range.

[0011] In a possible design, the control of at least one of the water temperature and flow rate of the water outlet flow of the water-using terminal to continuously perform multiple transformations that can be sensed by the human body within a preset time threshold includes:

[0012] Control at least one of the water temperature and flow rate of the water outlet flow to continuously perform at least three transformations within a preset warning threshold range.

[0013] In a possible design, controlling the water temperature of the water outlet flow to fluctuate includes:

[0014] Control the gas water heater to be repeatedly turned on during the operation of the solar water heater so that the water temperature of the water outlet flow is transformed.

[0015] In a possible design, controlling the flow rate of the water outlet flow to fluctuate includes:

[0016] Control the solar water heater to be switched between the on state and the off state multiple times, wherein the on state lasts for a preset first duration each time, and the off state lasts for a preset second duration each time.

[0017] In a possible design, after switching to the gas water heater to supply water to the water-using terminal, it further includes:

[0018] Control the instant hot water device equipped with the water-using terminal to be turned on;

[0019] If the inlet water temperature of the water-using terminal is greater than or equal to the second preset threshold, control the instant hot water device to be turned off.

[0020] In a possible design, the control to turn on the instant hot water device includes:

[0021] According to the inlet water temperature of the water-using terminal and the preset target water temperature, obtain the target heating power of the instant hot water device;

[0022] Control the instant hot water device to operate according to the target heating power.

[0023] The second aspect of the embodiments of the present application provides a control device for a parallel water-using system, including:

[0024] An acquisition module, configured to acquire the outlet water temperature of the solar water heater;

[0025] A processing module, when the water outlet temperature of the solar water heater is greater than a first preset threshold, controls the solar water heater to supply water to the water-using terminal; when the water outlet temperature is less than or equal to the first preset threshold, controls the gas water heater to supply water to the water-using terminal; and is further configured to give a warning before switching from the solar water heater to supply water to the water-using terminal to the gas water heater to supply water to the water-using terminal.

[0026] A third aspect of the embodiments of the present application provides a parallel water-using system. The parallel water-using system includes a solar water heater, a gas water heater, and at least one water-using terminal. The water outlet of the solar water heater and the water outlet of the gas water heater are both connected to the water inlet of the water-using terminal, and further includes: a processor and a memory;

[0027] The memory is used to store computer execution instructions;

[0028] The processor runs the computer execution instructions stored in the memory to implement the control method of the parallel water-using system as described in the first aspect above.

[0029] A fourth aspect of the embodiments of the present application provides a computer-readable storage medium. Computer execution instructions are stored in the computer-readable storage medium, and when the computer execution instructions are executed by a processor, they are used to implement the control method of the parallel water-using system as described in the first aspect above.

[0030] The control method, device, and parallel water-using system provided by the present application first detect the water outlet temperature of the solar water heater. When the water outlet temperature of the solar water heater is greater than the first preset threshold, it indicates that the water temperature of the solar water heater can meet the water-using needs of users. At this time, the solar water heater is controlled to supply water to the water-using terminal. When the water outlet temperature is less than or equal to the first preset threshold, it indicates that the water temperature of the solar water heater is difficult to meet the water-using needs of users at this time. At this time, the gas water heater is controlled to supply water to the water-using terminal, thereby realizing the automatic selection of water supply between the solar water heater and the gas water heater, without the need for manual operation by users, greatly improving the convenience of user use. At the same time, if during the user's water use process, the water supply is switched from the solar water heater to the gas water heater, a warning will be given to the user before switching to the gas water heater to supply water, reminding the user to pay attention to avoiding the cold water remaining in the pipeline during the switch and preventing the sudden drop in water temperature from causing harm to the user's body, thereby effectively improving the user experience. Description of the Drawings

[0031] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0032] Figure 1Flow schematic of the control method for the parallel water supply system provided by the embodiments of the present application Figure 1 ;

[0033] Figure 2 Flow schematic of the control method for the parallel water supply system provided by the embodiments of the present application Figure 2 ;

[0034] Figure 3 Structural schematic diagram of the control device for the parallel water supply system provided by the embodiments of the present application.

[0035] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be given in the following text. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0036] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below in conjunction with the drawings in the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0037] Terms such as "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented, for example, in an order different from those illustrated or described herein.

[0038] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0039] When many high-end finished houses are delivered, developers generally install solar water heaters. Since solar water heaters are affected by sunlight intensity and time, users usually install a gas water heater at home as well. However, installing a gas water heater increases the workload of switching between water heaters. It doesn't matter if a user installs a solar water heater and a gas water heater at home. Generally, the solar water heater and the gas water heater are installed in two relatively distant locations in the home. When the user uses the solar water heater, they need to close the valve body on the gas water heater side and then open the valve body of the solar water heater. When the user uses the gas water heater, they need to close the valve body of the solar water heater and then open the valve body of the gas water heater. Although it is a simple valve operation, many users are not willing to spend too much energy and time on this operation.

[0040] The control method, device and parallel water use system provided by the present invention are mainly used to eliminate this part of the redundant workload of users, realize the automatic switching between the solar water heater and the gas water heater, and when switching from the solar water heater to the gas water heater, give an early warning to the user in advance, reminding the user to avoid the water flow in advance or perform other treatments to avoid harm to the user's body caused by the water temperature change.

[0041] The following will specifically describe the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems with specific embodiments. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] This embodiment provides a control method for a parallel water use system, which is mainly used for controlling when a gas water heater and a solar water heater are used in parallel. Specifically, the parallel water use system includes a solar water heater, a gas water heater and at least one water use terminal. The water use terminal is used to supply hot water for users to use, and its quantity and location can be selected according to user needs. The water outlet of the solar water heater and the water outlet of the gas water heater are both connected to the water inlet of the water use terminal, so that the water of both the solar water heater and the gas water heater can flow out from the water use terminal.

[0043] Please refer to Figure 1 As shown, the control method of the parallel water use system in this embodiment includes:

[0044] S101. Obtain the outlet water temperature of the solar water heater;

[0045] Specifically, a temperature sensor can be installed at the water outlet of the solar energy, and the outlet water temperature of the solar water heater can be monitored in real time through the temperature sensor.

[0046] S102. Determine whether the outlet water temperature of the solar water heater is greater than the first preset threshold;

[0047] If so, jump to step S103; if not, jump to step S104.

[0048] The first preset threshold is used to represent the lowest water temperature acceptable to the user. The first preset threshold can be set in advance or set by the user in real time according to the water use requirements.

[0049] S103. Control the solar water heater to supply water to the water-using terminal;

[0050] Specifically, when the outlet water temperature is greater than the first preset threshold, it indicates that the outlet water temperature of the solar water heater can still meet the user's water use requirements, and the solar water heater can continue to be used for water supply to save energy.

[0051] S104. Determine whether the water-using terminal has been supplied with water by the solar water heater before switching to the gas water heater to supply water to the water-using terminal;

[0052] If not, jump to step S106; if so, jump to step S105.

[0053] S105. Give an early warning;

[0054] Specifically, during the user's water use process, if the water supply to the water-using terminal is switched from the solar water heater to the gas water heater, the cold water stored in the water pipe connected to the outlet end of the gas water heater will first flow out through the water-using terminal. At this time, if the user is unaware, cold water will pour on the user, making the user feel uncomfortable and even affecting the user's physical health. Giving an early warning to the user before the switch can enable the user to avoid the cold water in advance or take other treatment methods, making the user's water use more comfortable.

[0055] S106. Control the gas water heater to supply water to the water-using terminal;

[0056] Specifically, when the outlet water temperature is less than or equal to the first preset threshold, it indicates that the outlet water temperature of the solar water heater can no longer meet the user's water use requirements, and only the gas water heater can be used to heat the water. Of course, it can be understood that the solar water heater and the gas water heater will not be turned on at the same time. When the solar water heater is turned on, the gas water heater is turned off, and when the gas water heater is turned on, the solar water heater is turned off.

[0057] In this embodiment, the water outlet temperature of the solar water heater is first detected. When the water outlet temperature of the solar water heater is greater than the first preset threshold, it indicates that the water temperature of the solar water heater can meet the user's water use requirements. At this time, the solar water heater is controlled to supply water to the water use terminal. When the water outlet temperature is less than or equal to the first preset threshold, it indicates that the water temperature of the solar water heater is difficult to meet the user's water use requirements at this time. At this time, the gas water heater is controlled to supply water to the water use terminal, so as to realize the automatic selection of water supply between the solar water heater and the gas water heater, without manual operation by the user, greatly improving the convenience of user use. At the same time, if the water supply is switched from the solar water heater to the gas water heater during the user's water use process, before switching to the gas water heater for water supply, a warning will be given to the user first, reminding the user to pay attention to avoiding the cold water remaining in the pipeline during the switch and preventing the sudden drop in water temperature from causing harm to the user's body, thereby effectively improving the user's use experience.

[0058] In some possible implementation manners, the warning method includes: when the water outlet temperature of the solar water heater is less than or equal to the first preset threshold, within a preset time threshold, the gas water heater is controlled to be repeatedly turned on during the operation of the solar water heater, and the temperature of the water flowing out of the water use terminal changes alternately accordingly. At the same time, by controlling the opening time of the gas water heater, the water temperature is controlled to change within a preset warning threshold range, so as to reduce the impact on the user while giving a warning.

[0059] Specifically, at this time, the water temperature in the solar water heater is basically within the acceptable water use temperature range of the user, while the water flowing from the gas water heater to the water use terminal is still the cold water stored in the water pipe. When the gas water heater is turned on, it supplies water to the water use terminal together with the solar water heater. At this time, the water temperature of the water flowing into the water use terminal will drop to a certain extent. When the gas water heater is turned off, the solar water heater supplies water to the water use terminal alone, and the water temperature of the water flowing out of the water use terminal will rise to a certain extent, so that the water temperature of the water flowing out of the water use terminal fluctuates to a certain extent, enabling the user to perceive the water temperature fluctuation and thus achieving a warning effect on the user.

[0060] Among them, in order to facilitate the user's perception, the water temperature is at least changed 3 times, that is, the gas water heater runs together with the solar water heater at least twice. Of course, the number of water temperature changes should not be too many, just enough to be perceived by the user, that is, the number of changes can be limited by the preset time threshold.

[0061] Exemplarily, the time when the gas water heater and the solar water heater operate together can be 5s, while the time when the solar water heater operates alone is 1s. That is, when switching from the solar water heater supplying water to the water-using terminal to the gas water heater supplying water to the water-using terminal, first let the gas water heater and the solar water heater be turned on together for 5s, then immediately turn off the gas water heater, turn on the solar water heater for 1s, then turn on the gas water heater and the solar water heater to operate together for 5s, and then the solar water heater can be turned off, so that the gas water heater can supply water to the water-using terminal normally alone, thereby making the water temperature change little during the warning process and realizing a smooth transition of the water temperature.

[0062] In some possible implementation manners, the warning method includes: when the outlet water temperature of the solar water heater is less than or equal to the first preset threshold, within a preset time threshold, controlling the solar water heater to switch between the on state and the off state multiple times, so that the flow rate of the outlet water flow of the water-using terminal changes correspondingly within a preset warning threshold range, to remind the user that the water supply will be switched to the gas water heater soon.

[0063] Among them, the flow rate change of the outlet water flow is at least continuously performed three times or more to ensure that the user can smoothly perceive it. In addition, the on state can last for a preset first duration each time, and the off state can last for a preset second duration each time, and the first duration and the second duration can be equal or unequal.

[0064] Exemplarily, the first duration and the second duration can both be 1s, and the preset time threshold is 6s, that is, after the solar water heater keeps the on state for 1s, it immediately enters the off state for 1s, repeats three times, and then the gas water heater can be turned on to supply water to the water-using terminal alone.

[0065] Such a warning method only continuously changes the water flow, and the water flow change is within the preset time threshold and the preset warning threshold range, with a short time and a not too large fluctuation range, which can not only enable the user to perceive it, but also not make the user feel too uncomfortable or cause an impact on the user's body.

[0066] In some possible implementation manners, an instant hot water device is built in the water-using terminal. Please refer to Figure 2 as shown. After switching from the solar water heater to the gas water heater for water supply, it further includes:

[0067] S201. Obtain the inlet water temperature and the target water temperature of the water-using terminal;

[0068] Specifically, a temperature sensor can be set at the water inlet of the water-using terminal to obtain the inlet water temperature of the water-using terminal, and the target water temperature is the outlet water temperature preset by the user.

[0069] Among them, the inlet water temperature here can be the real-time inlet water temperature of the water-using terminal.

[0070] The inlet water temperature here can also be the inlet water temperature of the water-using terminal at a preset historical moment, for example, the inlet water temperature 3 s before the current moment, so as to reserve the time for the water to flow from the water-using terminal to the instant hot water device. Of course, it can be understood that the specific value of the historical moment can be determined according to the time required for the water flow to move from the temperature sensor to the location where the instant hot water device is located, so as to ensure that the water flowing out of the water-using terminal is heated by the instant hot water device.

[0071] S202. Determine the target heating power of the instant hot water device;

[0072] Specifically, after knowing fixed parameters such as the inlet water temperature, the target heating temperature, and the time for the water flow to pass through the instant hot water device, the heating power that the instant hot water device needs to reach can be calculated to ensure that the water flowing through the instant hot water device can meet the user's usage requirements.

[0073] Among them, the instant hot water device can be a common electric heating instant water heater.

[0074] S203. Control the instant hot water device to operate according to the target heating power;

[0075] S204. Determine whether the inlet water temperature is greater than or equal to a second preset threshold;

[0076] If so, jump to step S205;

[0077] If not, jump to step S201.

[0078] S205. Control the instant hot water device to turn off.

[0079] Specifically, when the inlet water temperature reaches the second preset threshold, it indicates that the water temperature has risen to the range of water that can be used by the user, and there is no need to heat it additionally. At this time, the instant hot water device can be turned off.

[0080] Such a setting method enables the cold water flowing out of the pipeline of the gas water heater to be heated by the instant hot water device before use when switching from the solar water heater to the gas water heater, without cold water hitting the user's body, which can greatly improve the comfort of the user's water use.

[0081] Please refer to Figure 3 As shown, the embodiment of the present application further provides a control device 300 for a parallel water use system, including an acquisition module 310 and a processing module 320.

[0082] Among them, the acquisition module 310 is used to acquire the outlet water temperature of the solar water heater; the processing module 320 is used to control the solar water heater to supply water to the water-using terminal when the outlet water temperature of the solar water heater is greater than the first preset threshold; and is used to control the gas water heater to supply water to the water-using terminal when the outlet water temperature is less than or equal to the first preset threshold; and is also used to give a warning before switching from the solar water heater to supply water to the water-using terminal to the gas water heater to supply water to the water-using terminal. Among them, if the solar water heater supplies water to the water-using terminal before controlling the gas water heater to supply water to the water-using terminal, a warning is given first before switching to the gas water heater to supply water.

[0083] In some possible implementation manners, the processing module 320 is further used to control at least one of the water temperature and the flow rate of the outlet water flow of the water-using terminal to continuously perform multiple transformations that can be sensed by the human body within a preset time threshold to give a warning, wherein both the water temperature and the flow rate of the outlet water flow are transformed within a preset warning threshold range.

[0084] In some possible implementation manners, the processing module 320 is further used to control at least one of the water temperature and the flow rate of the outlet water flow to continuously perform at least three transformations within a preset warning threshold range.

[0085] In some possible implementation manners, the processing module 320 is further used to control the gas water heater to be repeatedly turned on during the operation of the solar water heater so that the water temperature of the outlet water flow is transformed to give a warning.

[0086] In some possible implementation manners, the processing module 320 is further used to control the solar water heater to be switched between the on state and the off state multiple times, wherein the on state lasts for a preset first duration each time, and the off state lasts for a preset second duration each time.

[0087] In some possible implementation manners, the processing module 320 is further used to control the instant hot water device equipped with the water-using terminal to be turned on after switching to the gas water heater to supply water to the water-using terminal; if the inlet water temperature of the water-using terminal is greater than or equal to the second preset threshold, the instant hot water device is controlled to be turned off.

[0088] In some possible implementation manners, the acquisition module 310 is further used to acquire the inlet water temperature and the target water temperature of the water-using terminal; the processing module 320 is further used to acquire the target heating power of the instant hot water heater device and control the instant hot water heater to operate according to the target heating power.

[0089] The embodiment of the present application further provides a parallel water-using system, including a solar water heater, a gas water heater, and at least one water-using terminal. The outlet of the solar water heater and the outlet of the gas water heater are both communicated with the inlet of the water-using terminal, and further includes: a processor and a memory;

[0090] The memory is used to store computer-executable instructions;

[0091] The processor runs the computer-executable instructions stored in the memory to implement the control method of the parallel water supply system in the above embodiments.

[0092] Among them, a first solenoid valve is installed on the solar water heater, and a second solenoid valve is installed on the gas water heater. Both the first solenoid valve and the second solenoid valve are communicatively connected to the processor. At the same time, a temperature sensor is also provided at the water outlet end of the solar water heater, and the temperature sensor is also communicatively connected to the processor. The processor obtains the water outlet temperature of the solar water heater through the temperature sensor, and controls the opening and closing of the solar water heater through the first solenoid valve, and controls the opening and closing of the gas water heater through the second solenoid valve.

[0093] Of course, in some possible implementation manners, an instant hot water device is provided in the water using terminal, and the instant hot water device is also communicatively connected to the processor to control the opening and closing of the instant hot water device through the processor.

[0094] Among them, the memory may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0095] The processor may be a central processing unit (CPU for short), or an application specific integrated circuit (ASIC for short), or one or more integrated circuits configured to implement the embodiments of the present application.

[0096] The parallel water supply system of this embodiment may further include a communication interface for information interaction. In specific implementation, if the communication interface, the memory, and the processor are implemented independently, the communication interface, the memory, and the processor may be connected to each other through a bus and complete communication with each other. The bus may be an Industry Standard Architecture (ISA for short) bus, a Peripheral Component Interconnect (PCI for short) bus, or an Extended Industry Standard Architecture (EISA for short) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0097] If the communication interface, memory, and processor are integrated on a single chip, the communication interface, memory, and processor can communicate through internal interfaces.

[0098] An embodiment of the present application further provides a computer-readable storage medium, which may include various media capable of storing program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs. The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the control method of the parallel water use system in the above embodiments.

[0099] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control method for a parallel water supply system, characterized in that, the parallel water supply system includes a solar water heater, a gas water heater and at least one water using terminal, the water outlet of the solar water heater and the water outlet of the gas water heater are both connected to the water inlet of the water using terminal, and the control method includes: if the water outlet temperature of the solar water heater is greater than a first preset threshold, controlling the solar water heater to supply water to the water using terminal; if the water outlet temperature is less than or equal to the first preset threshold, controlling the gas water heater to supply water to the water using terminal; wherein, if the solar water heater supplies water to the water using terminal before controlling the gas water heater to supply water to the water using terminal, a warning is given before switching to the gas water heater for water supply.

2. The control method for a parallel water supply system according to claim 1, characterized in that, the warning given before switching to the gas water heater for water supply includes: controlling at least one of the water temperature and the flow rate of the water outlet flow of the water using terminal to continuously change in a plurality of times that can be sensed by a human within a preset time threshold, wherein both the water temperature and the flow rate of the water outlet flow change within a preset warning threshold range.

3. The control method for a parallel water supply system according to claim 2, characterized in that, the controlling at least one of the water temperature and the flow rate of the water outlet flow of the water using terminal to continuously change in a plurality of times that can be sensed by a human within a preset time threshold includes: controlling at least one of the water temperature and the flow rate of the water outlet flow to continuously change at least three times within a preset warning threshold range.

4. The control method for a parallel water supply system according to claim 3, characterized in that, controlling the water temperature of the water outlet flow to fluctuate includes: controlling the gas water heater to be repeatedly turned on during the operation of the solar water heater so that the water temperature of the water outlet flow changes.

5. The control method for a parallel water supply system according to claim 3, characterized in that, controlling the flow rate of the water outlet flow to fluctuate includes: controlling the solar water heater to be switched between an on state and an off state for a plurality of times, wherein the on state lasts for a preset first duration each time, and the off state lasts for a preset second duration each time.

6. The control method for a parallel water supply system according to any one of claims 1-5, characterized in that, after switching to the gas water heater to supply water to the water using terminal, it further includes: controlling the instant hot water device equipped with the water using terminal to be turned on; if the water inlet temperature of the water using terminal is greater than or equal to a second preset threshold, controlling the instant hot water device to be turned off.

7. The control method for a parallel water supply system according to claim 6, characterized in that, the controlling the instant hot water device to be turned on includes: acquiring the target heating power of the instant hot water device according to the water inlet temperature of the water using terminal and a preset target water using temperature; controlling the instant hot water device to operate according to the target heating power.

8. A control device for a parallel water supply system, characterized in that, comprising: An acquisition module, configured to acquire the outlet water temperature of a solar water heater; A processing module, when the outlet water temperature of the solar water heater is greater than a first preset threshold, controls the solar water heater to supply water to the water-using terminal; when the outlet water temperature is less than or equal to the first preset threshold, controls the gas water heater to supply water to the water-using terminal; and is further configured to give a warning before switching from the solar water heater to supply water to the water-using terminal to the gas water heater to supply water to the water-using terminal.

9. A parallel water supply system Characterized in that The parallel water supply system includes a solar water heater, a gas water heater and at least one water-using terminal. The outlet of the solar water heater and the outlet of the gas water heater are both communicated with the inlet of the water-using terminal, and further includes: a processor and a memory; The memory is configured to store computer execution instructions; The processor runs the computer execution instructions stored in the memory to implement the control method of the parallel water supply system according to any one of claims 1-7.

10. A computer-readable storage medium Characterized in that The computer-readable storage medium stores computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the control method of the parallel water supply system according to any one of claims 1-7.

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