Water purifier and control method thereof

Abstract

The embodiment of the invention provides a water purifier and a control method thereof.The water purifier comprises a normal-temperature water outlet and a mixed water outlet and further comprises a water production module, a water tank, a hot tank and a control module, and a water outlet of the water production module is connected to a water inlet of the water tank and a water inlet of the hot tank; a water outlet of the water tank is connected to the mixed water outlet through a first water path and connected to the normal-temperature water outlet through a third water path, and a water outlet of the hot tank is connected to the mixed water outlet through a second water path; a first pumping device, a second pumping device and a third pumping device are respectively arranged on the first water path, the second water path and the third water path; the flow of the first pumping device and the flow of the second pumping device are both adjustable, and the control module controls the third pumping device to work when receiving the normal-temperature water taking information and controls the first pumping device and the second pumping device to work at the flow corresponding to the expected water taking temperature indicated by the hot water taking information when receiving the hot water taking information. The temperature of water conveyed to the mixed water outlet is controlled, and the requirements of users are met.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a water purifier with a water tank and a hot tank and a control method thereof. Background Art

[0002] With the development of the times, water purifiers have been recognized and purchased by most people, and most of the water purifiers on the market now have heating functions and can provide hot water and normal temperature water.

[0003] For small-capacity water purifiers with a daily water output of less than 400 gallons, a water tank and a hot tank are usually provided in the water purifier. A certain amount of water can be stored in both the water tank and the hot tank, and the hot tank can heat the water to a predetermined temperature. When the user needs normal temperature water, he can directly take it from the water tank, and when he needs hot water, he can directly take it from the hot tank. The hot water temperature depends on the insulation temperature of the hot tank.

[0004] Although this type of water purifier can provide hot water, the outlet temperature of the hot water cannot be adjusted, resulting in a poor user experience. Summary of the invention

[0005] In order to at least partially solve the problems existing in the prior art, some embodiments of the present invention provide a water purifier. The water purifier has a raw water inlet, a normal temperature water outlet and a mixed water outlet, and also includes: a water production module, the water inlet of the water production module is connected to the raw water inlet; a water tank, the water inlet of the water tank is connected to the water outlet of the water production module, the water outlet of the water tank is connected to the mixed water outlet through the first water path and is connected to the normal temperature water outlet through the third water path; a first pumping device is provided on the first water path, and a third pumping device is provided on the third water path; a hot tank, the water inlet of the hot tank is connected to the water outlet of the water production module, the water outlet of the hot tank is connected to the mixed water outlet through the second water path, and a second pumping device is provided on the second water path; and a control module, the control module is used to control the third pumping device to work when receiving normal temperature water intake information, and control the first pumping device and the second pumping device to work at a flow rate corresponding to the desired water intake temperature indicated by the hot water intake information when receiving hot water intake information.

[0006] The present application can provide normal temperature water and hot water respectively by setting a water tank and a hot tank, and by making the flow rates of the first pumping device for pumping out the normal temperature water in the water tank and the second pumping device for pumping out the hot water in the hot tank adjustable, the temperature of the output hot water can be adjusted within a certain range. Moreover, when the user needs normal temperature water, it can be pumped directly from the water tank; when the user needs hot water at a higher temperature, it can be pumped directly from the hot tank. Therefore, the user has greater freedom of choice and can meet more needs of the user. In addition, since the water purifier is provided with a water tank and a hot tank, both of which have a water storage function, this solution of outputting hot water of various temperatures can be applicable to large-flux water purifiers, as well as to small-flux water purifiers, and is particularly applicable to small-flux water purifiers.

[0007] Exemplarily, the water purifier also includes a temperature sensor assembly for detecting the temperature in the water circuit. The temperature sensor assembly includes a first temperature sensor arranged on the first water circuit and / or the water tank, a second temperature sensor arranged on the second water circuit and / or the hot tank, and / or a third temperature sensor arranged between the water outlet formed by the first water circuit and the second water circuit in parallel and the clean water outlet. The control module is also used to determine the flow rate of the first pumping device and the second pumping device according to the expected water intake temperature and the temperature measured by the temperature sensor assembly. The first temperature sensor can solve the problem that the water temperature may change with the seasons, so that the water outlet temperature reaches the user's expected water intake temperature. The second temperature sensor can accurately determine the hot water temperature output from the hot tank to the clean water outlet, and then accurately determine the flow rate of the adjustable pumping device, so that the water outlet temperature reaches the user's expected water intake temperature. The third temperature sensor can accurately determine the water temperature at the mixed water outlet, and then accurately determine the flow rate of the adjustable pumping device, so that the water outlet temperature reaches the user's expected water intake temperature.

[0008] For example, the normal temperature water intake information includes the expected water intake temperature input by the user, which is lower than or equal to the normal temperature water temperature, and the hot water intake information includes the expected water intake temperature input by the user, which is higher than the normal temperature water temperature. This can prevent the temperature of the water in the water tank from affecting the output of normal temperature water by the water purifier due to seasonal changes; for hot water, it can be provided according to the expected water intake temperature input by the user.

[0009] Exemplarily, the water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline to connect to the water outlet of the water production module. The hot tank can take water from the water tank as needed, which can make the control logic relatively simple and reduce the number of starts and stops of the water production module.

[0010] Exemplarily, the water tank is located above the hot tank. In this way, the clean water in the water tank can be directly replenished to the hot tank by gravity, which can reduce costs and save space inside the water purifier.

[0011] Exemplarily, a water replenishment solenoid valve is provided on the water replenishment pipeline. By providing the water replenishment solenoid valve, the timing of replenishing water into the hot tank can be controlled as needed, and the water replenishment is more flexible.

[0012] Exemplarily, a water level detection device for detecting the water level in the hot tank is provided on the hot tank, and the water purifier further includes an input device for receiving the user's water extraction operation and generating water extraction information. The control module is used to control the water replenishment solenoid valve to open when the water level in the hot tank is lower than the preset water level lower limit and the user stops extracting water based on the water extraction information, and control the water replenishment solenoid valve to close when the water level in the hot tank reaches the preset water level upper limit. Setting the preset water level lower limit can avoid the second pumping device still being turned on when the water level in the hot tank is lower than the preset water level lower limit, causing the second pumping device to run idle and affecting the service life. The control module controls the water replenishment solenoid valve to close when the user extracts water, so that on the one hand, all the normal temperature water is directly output, or all is mixed with hot water and output, and the total amount will not be reduced due to the water replenishment of the hot tank; on the other hand, it avoids replenishing water to the hot tank, resulting in a decrease in the water temperature in the hot tank, thereby ensuring that the user can get water of a suitable temperature in a short time when extracting water. When the water level in the hot tank is equal to the preset water level lower limit and the user stops extracting water, the water replenishment solenoid valve is controlled to open, so that water can be replenished to the hot tank in time. When the water level in the hot tank reaches the preset water level upper limit, the control module can control the water replenishment solenoid valve to close, which can ensure that there is enough water in the hot tank for users to use, and can also make the water replenishment solenoid valve close in time.

[0013] Exemplarily, the water outlet of the hot tank is located at the bottom of the hot tank, so as to ensure that all the hot water in the hot tank can be taken out as much as possible, thereby providing a larger amount of hot water for the user.

[0014] Exemplarily, the water purifier includes a heating faucet, and the normal temperature water pipe and the hot water pipe in the heating faucet are respectively connected to the normal temperature water outlet and the mixed water outlet, and the control module is used to: when the water level in the hot tank is higher than the preset water level lower limit, control the heating faucet to heat with a first power lower than its rated power so that the water outlet temperature of the heating faucet reaches the desired water intake temperature; when the water level in the hot tank is lower than the preset water level lower limit, control the heating faucet to heat with a second power so that the water outlet temperature of the heating faucet reaches the desired water intake temperature, and the second power is greater than the first power and less than or equal to the rated power. The power of the heating faucet can be utilized to a large extent, the response speed to temperature changes can be improved, and a large flow of hot water or even boiling water can be output.

[0015] Exemplarily, a gravity check valve that can be unidirectionally conducted along the gravity direction is provided on the water supply pipeline. The gravity check valve can automatically and timely supply water to the hot tank and prevent hot water from entering the water tank.

[0016] Exemplarily, the water outlet of the hot tank is located at the upper part of the hot tank, and / or the water inlet of the hot tank is located at the lower part of the hot tank. In order to output as much hot water as possible, the water outlet of the hot tank is arranged at the lower part of the hot tank. The water inlet is arranged at the lower part of the hot tank to prevent normal temperature water and hot water from mixing in the hot tank and then flowing out, or to prevent normal temperature water from flowing out of the water outlet immediately after entering the hot tank.

[0017] Exemplarily, the water purifier includes a heating faucet, and the normal temperature water pipe and the hot water pipe in the heating faucet are connected to the normal temperature water outlet and the mixed water outlet respectively, and the control module is used to: control the heating faucet to heat with a heating power lower than its rated power during the start of the water extraction period so that the outlet water temperature of the heating faucet reaches the desired water extraction temperature, and control the heating faucet to adjust the heating power when the heating power of the heating faucet is lower than the rated power during the water extraction period after the start of the water extraction period so that the outlet water temperature of the heating faucet reaches the desired water extraction temperature, and control the flow of the first pumping device and the second pumping device when the heating power of the heating faucet reaches the rated power so that the outlet water temperature of the heating faucet reaches the desired water extraction temperature. In this way, the power of the heating faucet can be utilized to a greater extent, the response speed to temperature changes can be improved, a large flow of hot water or even boiling water can be output, and the user experience can be improved.

[0018] Exemplarily, check valves are provided on the first water channel and the second water channel. By providing the check valves, cross-flow of hot and cold water can be prevented, thereby ensuring the stability of the water temperature.

[0019] For example, the hot water and mixed water output from the mixed water outlet can be reheated through the heating faucet, which can meet the user's demand for water at a higher temperature (such as boiling water). Because the heating faucet has a faster response speed, the water temperature can be quickly adjusted by adjusting the heating power of the heating faucet, and hot water with a precise desired water intake temperature can be output. The power of the heating faucet is limited, and by cooperating with the mixed water, a large flow of hot water can be output. The normal temperature water is separated from the hot water outlet, and the normal temperature water and hot water do not interfere with each other, which can further ensure the accuracy of the water temperature.

[0020] Exemplarily, the hot tank further has an exhaust port disposed at its upper portion and used to communicate with the water tank and / or a drain port disposed at its lower portion. The exhaust port can balance the internal air pressure when the hot tank is filled with water or pumped out of water, preventing normal temperature water from being unable to be injected or hot water from being unable to be pumped out due to negative pressure in the tank. During heating, the generated water vapor can also be discharged through the exhaust port. By providing the drain port, the water in the hot tank can be completely drained when necessary.

[0021] Some other embodiments of the present invention provide a control method, which is applicable to the following water purifier: the water purifier has a raw water inlet, a normal temperature water outlet and a mixed water outlet, and also includes: a water production module, the water inlet of the water production module is connected to the raw water inlet; a water tank, the water inlet of the water tank is connected to the water outlet of the water production module, the water outlet of the water tank is connected to the mixed water outlet through a first water path, and is connected to the normal temperature water outlet through a third water path; a first pumping device is provided on the first water path, and a third pumping device is provided on the third water path; a hot tank, the water inlet of the hot tank is connected to the water outlet of the water production module, the water outlet of the hot tank is connected to the mixed water outlet through a second water path, and a second pumping device is provided on the second water path; and a control module, the first pumping device and the second pumping device are both flow-adjustable pumping devices, and the control method includes: controlling the third pumping device to operate when normal temperature water intake information is received, and controlling the first pumping device and the second pumping device to operate at a flow rate corresponding to the desired water intake temperature indicated by the hot water intake information when hot water intake information is received.

[0022] The water temperature of the output hot water can be adjusted within a certain range. Moreover, when the user needs normal temperature water, it can be pumped directly from the water tank; when the user needs hot water at a higher temperature, it can be pumped directly from the hot tank. Therefore, the user has greater freedom of choice and can meet more needs of the user.

[0023] Exemplarily, the normal temperature water outlet and the mixed water outlet are connected to the normal temperature water pipe and the hot water pipe of the heating faucet respectively, the water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline, and then connected to the water outlet of the water production module, and a water supply solenoid valve is arranged on the water supply pipeline.

[0024] The control method also includes:

[0025] When receiving hot water intake information, operating both the first pumping device and the second pumping device or operating only the second pumping device, so that the outlet water temperature of the mixed water outlet is lower than the expected water intake temperature;

[0026] Controlling the heating faucet to heat at a first power lower than its rated power so that the outlet water temperature of the heating faucet reaches a desired water intake temperature until the water level in the hot tank is lower than a preset water level lower limit; and

[0027] The heating faucet is controlled to heat at a second power so that the outlet water temperature of the heating faucet reaches a desired water intake temperature, and the second power is greater than the first power and less than or equal to the rated power.

[0028] This can provide hot water with the largest flow rate, and can also make greater use of the power of the heating faucet, increase the response speed to temperature changes, and output a larger flow of hot water or even boiling water.

[0029] Exemplarily, the normal temperature water outlet and the mixed water outlet are connected to the normal temperature water pipe and the hot water pipe of the heating faucet respectively, the water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline, and then connected to the water outlet of the water production module, and a gravity one-way valve is arranged on the water supply pipeline.

[0030] Control methods include:

[0031] When receiving hot water intake information, operating both the first pumping device and the second pumping device or operating only the second pumping device, so that the outlet water temperature of the mixed water outlet is lower than the expected water intake temperature;

[0032] The heating faucet is heated at a heating power lower than its rated power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature;

[0033] Increasing the heating power of the heating faucet to make the outlet water temperature of the heating faucet reach the desired water intake temperature until the heating power of the heating faucet reaches the rated power; and

[0034] The heating faucet is kept at rated power, and the flow rates of the first pumping device and the second pumping device are adjusted to make the outlet water temperature of the heating faucet reach the desired water intake temperature.

[0035] This can maximize the use of the heating faucet power, improve the response speed to temperature changes, output a larger flow of hot water or even boiling water, and enhance the user experience.

[0036] A series of simplified concepts are introduced in the summary of the invention, which will be further described in detail in the detailed description. The summary of the invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0037] The advantages and features of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0039] Figure 1 is a water circuit diagram of a water purifier according to a first exemplary embodiment of the present invention;

[0040] Figure 2 is a water circuit diagram of a water purifier according to a second exemplary embodiment of the present invention;

[0041] Figure 3 A curve diagram showing the relationship between the heating faucet power, the hot tank water temperature, and the output flow rate of a water purifier according to an exemplary embodiment of the present invention;

[0042] Figure 4 is a curve diagram showing the relationship between the heating faucet power and the hot tank water volume of a water purifier according to another exemplary embodiment of the present invention;

[0043] Figure 5 A control flow chart of a water purifier according to an exemplary embodiment of the present invention; and

[0044] Figure 6 FIG. 4 is a control flow chart of a water purifier according to another exemplary embodiment of the present invention.

[0045] The above drawings include the following reference numerals:

[0046] 100, 100', water purifier; 110, raw water inlet; 120, normal temperature water outlet; 130, mixed water outlet; 200, water production module; 210, water inlet of water production module; 220, water outlet of water production module; 300, water tank; 310, water inlet of water tank; 320, water outlet of water tank; 400, first water circuit; 410, first pumping device; 500, hot tank; 510, water inlet of hot tank; 520, water outlet of hot tank; 530, exhaust port; 540, drain port; 550, water level detection device; 600, second water circuit; 610, second pumping device; 700, third water circuit; 710, third pumping device; 800, water supply pipeline; 810, water supply solenoid valve; 820, gravity check valve; 900, heating faucet. DETAILED DESCRIPTION

[0047] In the following description, a large amount of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only exemplarily illustrates a preferred embodiment of the present invention, and the present invention can be implemented without one or more such details. In addition, in order to avoid confusion with the present invention, some technical features well known in the art are not described in detail.

[0048] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0049] An embodiment of the present invention provides a water purifier. The water purifier may be a variety of types of water purifiers, including but not limited to a tabletop water purifier or an under-the-sink water purifier, etc. The water purifier according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] like Figure 1As shown, the water purifier 100 has a raw water inlet 110, a normal temperature water outlet 120 and a mixed water outlet 130, and also includes a water making module 200, a water tank 300 and a hot tank 500. The water inlet 210 of the water making module 200 is connected to the raw water inlet 110. Exemplarily, the water making module 200 may include a central filter element such as a reverse osmosis filter element, an ultrafiltration filter element, a nanofiltration filter element or a composite filter element composed of any two or more of them. For the reverse osmosis filter element and the nanofiltration filter element, the water needs to be pressurized before the water enters the filter element. In this case, the water making module 200 may also include a booster pump. Optionally, the water making module 200 may also include a pre-filter element, which is located before the central filter element and is used to perform preliminary filtration on the water entering the central filter element to extend the service life of the central filter element. The reverse osmosis filter element or the nanofiltration filter element will produce a certain proportion of concentrated water during the filtration process, and the concentrated water produced is discharged from the concentrated water outlet.

[0051] The water inlet 310 of the water tank 300 is connected to the water outlet 220 of the water production module 200, and the water outlet 320 of the water tank 300 is connected to the mixed water outlet 130 through the first water path 400. A first pumping device 410 is provided on the first water path 400. The water inlet 510 of the hot tank 500 is connected to the water outlet 220 of the water production module 200, and the water outlet 520 of the hot tank 500 is connected to the mixed water outlet 130 through the second water path 600. The hot tank 500 is used to heat and store clean water at room temperature. In some embodiments, the hot tank 500 may also have a heat preservation function. A second pumping device 610 is provided on the second water path 600. The first pumping device 410 is used to extract room temperature water from the water tank 300, and the second pumping device 610 can extract hot water from the hot tank 500, and this part of room temperature water and hot water are provided to the mixed water outlet 130. The flow rates of the first pumping device 410 and the second pumping device 610 are both adjustable. Exemplarily and not restrictively, the first pumping device 410 and the second pumping device 610 may be diaphragm pumps. In other words, for example, by changing the voltage applied to the first pumping device 410 and the second pumping device 610, the flow rate of normal temperature water drawn from the water tank 300 and the flow rate of hot water drawn from the hot tank 500 may be adjusted, so that the temperature of the mixed water delivered to the mixed water outlet 130 may be controlled to meet the user's requirements.

[0052] The water purifier 100 may also include a third waterway 700 and a control module. The third waterway 700 is connected between the water outlet 320 of the water tank 300 and the normal temperature water outlet 120, and a third pumping device 710 is provided on the third waterway 700. The control module is used to control the third pumping device 710 to work when receiving the normal temperature water intake information. Exemplarily, the normal temperature water intake information may include the desired water intake temperature that is lower than or equal to the normal temperature water temperature input by the user. Exemplarily, the normal temperature water temperature may be a fixed value within the range of, for example, 15 to 25 degrees. The normal temperature water intake information may also include one or more of when the user starts to take the normal temperature water, when to stop taking the normal temperature water, and the total amount of normal temperature water taken. The user may input the normal temperature water intake information by one or more of a button, a touch screen, a mobile device, etc. In some specific embodiments, the user may input the desired water intake temperature by a touch screen or a mobile device provided on the water purifier 100. It can be understood that since the water purifier 100 provided in the present application does not have a refrigeration function, the lowest water temperature outputted by it is the temperature of the water in the water tank 300. Since the temperature of the water in the water tank 300 may not be a fixed value due to seasonal changes, when the input water intake temperature is less than or equal to the water temperature in the water tank 300, the water purifier 100 will output normal temperature water. In some specific embodiments, when the desired water intake temperature input by the user is lower than the water temperature in the water tank 300, an error prompt will pop up on the touch screen and the mobile device, and the error prompt can also be presented by a prompt light set on the faucet or the water purifier 100. Exemplarily, the normal temperature water intake information can be sent to the controller by the normal temperature water intake button set at the ordinary faucet 900. When the user presses the normal temperature water intake button, the control module receives the normal temperature water intake information and controls the third pumping device 710 to output normal temperature water. For the water purifier 100, normal temperature water is the purified water in the water tank 300. It is understandable that the temperature of the purified water in the water tank 300 may vary with the seasons, and the user pressing the normal temperature water extraction button means that he or she wishes to use unheated purified water.

[0053] The control module is used to control the first pumping device 410 and the second pumping device 610 to operate at a flow rate corresponding to the desired water intake temperature indicated by the hot water intake information when receiving the hot water intake information. The hot water intake information may include the desired water intake temperature input by the user that is higher than the normal water temperature. The hot water intake information may also include one or more of when the user starts to take hot water, when the user stops taking hot water, and the total amount of hot water taken.

[0054] In the case where the mixed water outlet 130 is connected to an ordinary faucet without a heating function, the flow rates of the first pumping device 410 and the second pumping device 610 are determined according to the user's desired water intake temperature, so that the temperature of the water output from the mixed water outlet 130 is the desired water intake temperature; in the case where the mixed water outlet 130 is connected to a heating faucet 900, the flow rates of the first pumping device 410 and the second pumping device 610 are determined according to the desired water intake temperature, so that the temperature of the water output from the mixed water outlet 130 is lower than the desired water intake temperature, and then the hot water of the desired water intake temperature is heated and output through the heating faucet 900. The hot water intake information may be information input by the user. The input device for receiving the hot water intake information input by the user may be set at the water intake end of the faucet, for example, or may be set on the water purifier 100, or may be a user operation interface on a mobile device such as a mobile phone, etc. The input device may include one or more of a button, a touch screen, and a mobile device, etc.

[0055] like Figure 1 As shown, the output flow rates of the first pumping device 410 and the second pumping device 610 are both adjustable. To output mixed water having a temperature lower than or equal to the desired water intake temperature, the output flow rates of the first pumping device 410 and the second pumping device 610 may be adjusted simultaneously, or the output flow rate of only one of the first pumping device 410 and the second pumping device 610 may be adjusted. Since the temperature of the mixed water output from the mixed water outlet 130 is different when a common faucet and a heating faucet are connected, but the adjustment of the flow rates of the first pumping device 410 and the second pumping device 610 is basically the same, only the case of connecting the heating faucet 900 will be described below unless otherwise specified.

[0056] The first pumping device 410 and the second pumping device 610 may be continuously adjustable in flow rate, or may be adjustable in flow rate between different gears. In the case where the flow rate is continuously adjustable, the temperature of the output mixed water may be continuously adjustable, so that the temperature of the mixed water output by the mixed water outlet 130 can more accurately reach the user's desired water intake temperature. In the case where the flow rate is adjustable between different gears, the temperature of the mixed water output by the mixed water outlet 130 may only be adjustable between different gears. The more gears of the pumping device with continuously adjustable flow rate, the closer the temperature of the mixed water output by the mixed water outlet 130 can be to the desired water intake temperature.

[0057] The present application can provide normal temperature water and hot water respectively by setting a water tank 300 and a hot tank 500, and by making the flow of the first pumping device 410 for pumping out the normal temperature water in the water tank 300 and the second pumping device 610 for pumping out the hot water in the hot tank 500 adjustable, so that the water temperature of the output hot water can be adjusted within a certain range. Moreover, when the user needs normal temperature water, it can be directly pumped out from the water tank 300 through the third waterway 700; when the user needs hot water at a higher temperature, it can be directly pumped out from the hot tank 500. Therefore, the user has greater freedom of choice and can meet more needs of the user. In addition, since the water purifier 100 is provided with a water tank 300 and a hot tank 500, both of which have a water storage function, this solution of outputting hot water of multiple temperatures can be applied to large-flux water purifiers, small-flux water purifiers, and especially small-flux water purifiers.

[0058] Exemplarily, a check valve may be provided on the first water path 400 and the second water path 600. The check valve may be provided on the first water path 400 and the second water path 600 separately, or may be integrated with the first pumping device 410 and the second pumping device 610. The check valve may prevent the pumped normal temperature water from flowing back into the hot tank 500 through the non-operating second pumping device 610 when the first pumping device 410 is working alone, or prevent the pumped hot water from flowing back into the water tank 300 through the non-operating first pumping device 410 when the second pumping device 610 is working alone. In other words, by providing the check valve, the cross-flow of cold and hot water is prevented, thereby ensuring the stability of the water temperature.

[0059] The water purifier 100 provided in the present application can be used with an ordinary faucet without a heating function and a heated faucet with a heating function. Although in the illustrated embodiment, the normal temperature water outlet 120 and the mixed water outlet 130 are connected to the same faucet, in other embodiments not shown, the normal temperature water outlet 120 and the mixed water outlet 130 can be connected to different faucets, respectively. In the case of connecting different faucets, the one connected to the normal temperature water outlet 120 can be an ordinary faucet, and the one connected to the mixed water outlet 130 can be an ordinary faucet or a heated faucet. Figure 1 As shown, for the case where the normal temperature water outlet 120 and the mixed water outlet 130 are connected to the same heating faucet 900, the heating faucet 900 can have a normal temperature water pipe and a hot water pipe. The hot water pipe is provided with a heating body, and the heating body can heat the water in the hot water pipe. The normal temperature water pipe and the hot water pipe are independent of each other. They are respectively connected to the normal temperature water outlet 120 and the mixed water outlet 130, and have their own water outlets. In this way, when the user has just finished taking hot water, if he wants to take normal temperature water next, the hot water remaining in the hot water pipe will not be provided to the user. In order to cooperate with this dual-inlet and dual-outlet heating faucet, illustratively, as Figure 1As shown, the mixed water outlet 130 is used to connect to the hot water pipe of the heating faucet 900, and the normal temperature water outlet 120 is used to connect to the normal temperature water pipe of the heating faucet 900. The flow rate of hot water output from the hot tank 500 through the second water path 600 and the flow rate of normal temperature water output from the water tank 300 through the first water path 400 are both adjustable, and the hot water output from the mixed water outlet 130 can be provided only by the hot tank 500 through the second water path 600, or by the first water path 400 and the second water path 600. Normal temperature water can be output from the water tank 300 to the normal temperature water outlet 120 without limiting the flow rate through the third water path 700, so that the heating faucet 900 can output a large amount of normal temperature water.

[0060] Of course, in other embodiments, the normal temperature water pipe and the hot water pipe of the heating faucet 900 can share a water outlet. Optionally, the heating faucet 900 can also be replaced by a common faucet with double inlets and double outlets or a common faucet with double inlets and a single outlet.

[0061] When the water purifier 100 is connected to the heating faucet 900, continue to refer to Figure 1 , the hot water output from the mixed water outlet 130 can be heated again through the heating faucet 900, so that the user's demand for higher temperature water (such as boiling water) can be met. Similarly, when the water purifier 100 is connected to the heating faucet 900, the hot water flow output from the hot tank 500 through the second waterway 600 and the normal temperature water flow output from the water tank 300 through the first waterway 400 are controlled so that the temperature of the mixed water reaching the mixed water outlet 130 is slightly lower than the desired water intake temperature. The mixed water is heated again through the heating faucet 900 to reach the user's desired water intake temperature. Because the heating faucet has a faster response speed, the water temperature can be quickly adjusted by adjusting the heating power of the heating faucet 900, and the output temperature is precisely equal to the desired water intake temperature of the hot water. The power of the heating faucet 900 is limited, and by cooperating with the mixed water, a large flow of hot water output can also be achieved. The normal temperature water is separated from the hot water outlet, and the normal temperature water and the hot water do not interfere with each other, which can further ensure the accuracy of the water temperature.

[0062] Exemplarily, the water purifier 100 may also include a temperature sensor assembly for detecting the temperature in the water circuit. The temperature sensor assembly may include a first temperature sensor arranged on the first water circuit 400 and / or the water tank 300, a second temperature sensor arranged on the second water circuit 600 and / or the hot tank 500, and / or a third temperature sensor arranged between the water outlet formed in parallel by the first water circuit 400 and the second water circuit 600 and the mixed water outlet 130, a heating faucet water inlet temperature sensor arranged at the water inlet of the heating faucet 900, and a heating faucet water outlet temperature sensor arranged at the water outlet of the heating faucet 900. The temperature sensor assembly is electrically connected to the control module. The control module is also used to determine the flow rate of the first pumping device 410 and the second pumping device 610 according to the desired water intake temperature and the temperature measured by the temperature sensor assembly.

[0063] The first temperature sensor is used to detect the temperature of the normal temperature water output from the water production module 200. Figure 1 In the illustrated embodiment, the first temperature sensor may be disposed on the first waterway 400 or in the water tank 300. Normally, if the water purifier 100 is used indoors, the temperature difference of the normal temperature water in different seasons is not large, and the temperature of the normal temperature water may be considered to be 20 degrees. However, in some cases, the temperature of the normal temperature water produced by the water production module 200 may change with the seasons. In this case, the provision of the first temperature sensor may enable the control module to more accurately determine the output flow of the first pumping device 410 and the second pumping device 610, so that the outlet water temperature reaches the user's desired water intake temperature.

[0064] Normally, the hot tank 500 is used to heat the water therein to a predetermined temperature range. Exemplarily, the water purifier 100 may also include a hot tank temperature sensor for detecting the temperature in the hot tank 500 and generating hot tank temperature information, and the hot tank temperature sensor is electrically connected to the control module. When the water temperature in the hot tank 500 is lower than the lower limit of the predetermined temperature range, the heating component in the hot tank 500 is controlled to start heating. When the water temperature in the hot tank 500 reaches the upper limit of the predetermined temperature range, the heating component is controlled to stop heating. In this way, the temperature of the water in the hot tank 500 can be controlled to be constant within a certain interval range, which can not only prevent the water temperature in the hot tank 500 from being too low, but also avoid the frequent start and stop of the heating component to shorten the service life. Exemplarily, a positive temperature coefficient thermistor (PTC element) for constant temperature heating can be used to directly replace the temperature sensor and the heating component of the split body. The positive temperature coefficient thermistor for constant temperature heating can heat the temperature in the hot tank 500 and keep it at a constant temperature through the element itself, so as to achieve the stable output of hot water in the hot tank 500.

[0065] like Figure 1As shown, setting a predetermined temperature range for the hot tank 500 will cause the temperature of the hot water output from the second water circuit 600 to have a certain uncertainty. Based on this, a second temperature sensor can be provided to detect the temperature of the hot water output from the hot tank 500. The second temperature sensor can be arranged on the second water circuit 600 and / or on the hot tank 500. When the second temperature sensor is arranged on the hot tank 500, the second temperature sensor can include the aforementioned hot tank temperature sensor. By setting the second temperature sensor, the water temperature of the hot water output from the hot tank 500 to the mixed water outlet 130 can be accurately determined, and then the flow rate of the first pumping device 410 and the second pumping device 610 can be accurately determined, so that the outlet water temperature reaches the user's desired water intake temperature.

[0066] The first temperature sensor and the second temperature sensor can be provided one by one or both according to the need. Of course, the present application does not exclude the embodiment in which no temperature sensor is provided.

[0067] The first water channel 400 and the second water channel 600 are connected in parallel, and a third temperature sensor is provided between the water outlets of the two and the mixed water outlet 130, which can be used to detect the temperature of the mixed water of the first water channel 400 and the second water channel 600. When the temperature of the mixed water is higher than the temperature required for mixing water of the desired water intake temperature (as mentioned above, the temperature is the desired water intake temperature when the mixed water outlet 130 is connected to an ordinary faucet, and is lower than the desired water intake temperature when the mixed water outlet 130 is connected to a heating faucet 900), the hot water flow rate can be reduced or the normal temperature water flow rate can be increased. When the temperature of the mixed water is lower than the temperature required for mixing water of the desired water intake temperature, the hot water flow rate can be increased or the normal temperature water flow rate can be reduced. When the third temperature sensor is provided, the first temperature sensor and / or the second temperature sensor can be omitted. Of course, the present application does not exclude the provision of embodiments of the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0068] For some heating faucets, the heating faucet may have an inlet water temperature sensor and an outlet water temperature sensor, which are respectively arranged in front of and behind the heating body of the heating faucet. The inlet water temperature sensor of the heating faucet is used to detect the inlet water temperature of the heating faucet. In the case of having an inlet water temperature sensor, the third temperature sensor can be omitted. After determining the inlet water temperature of the heating faucet, the control module can determine how much heating power to put into the heating faucet. The outlet water temperature sensor of the heating faucet is used to detect the outlet water temperature of the heating faucet. When the outlet water temperature detected by the outlet water temperature sensor of the heating faucet is lower than the user's expected water intake temperature, the heating power can be increased or the mixed water temperature can be increased; conversely, when the outlet water temperature detected by the outlet water temperature sensor of the heating faucet is higher than the user's expected water intake temperature, the heating power can be reduced or the mixed water temperature can be reduced, thereby accurately controlling the heating power of the heating faucet. Of course, the inlet water temperature sensor of the heating faucet and the outlet water temperature sensor of the heating faucet can be set at one or the other. By setting the inlet water temperature sensor of the heating faucet and / or the outlet water temperature sensor of the heating faucet, the heating power of the heating faucet can be accurately determined so that the outlet water temperature of the heating faucet reaches the user's expected water intake temperature.

[0069] Exemplarily, the water inlet 510 of the hot tank 500 can be connected to the water outlet 320 of the water tank 300 through the water replenishment pipeline 800, so as to be connected to the water outlet 220 of the water production module 200. The water inlet 510 of the hot tank 500 can be connected to different water outlets than the first waterway 400, and of course, they can also be connected to the same water outlet 320. Clean water can be quickly added to the hot tank 500 through the water tank 300. Optionally, in other embodiments, the water inlet 510 of the hot tank 500 can be directly connected to the water outlet 220 of the water production module 200, so that clean water can be directly provided to the hot tank 500 by the water production module 200. In this case, it is necessary to control when the water production module 200 replenishes water into the water tank 300 and when it replenishes water into the hot tank 500. In the solution of supplying water from the water tank 300 to the hot tank 500, the water tank 300 can be filled with water when in standby mode or at any other suitable time, and the water production module 200 usually controls the start and stop once or directly fills the water tank 300 with water without stopping when water extraction is stopped. The hot tank 500 can extract water from the water tank 300 as needed, so that a relatively simple control logic can be adopted and the number of starts and stops of the water production module 200 can be reduced.

[0070] In some specific embodiments, an additional pumping device is provided between the water tank 300 and the hot tank 500 to pump the water in the water tank 300 into the hot tank 500. In other specific embodiments, the water tank 300 is located above the hot tank 500, so that the purified water in the water tank 300 can be directly replenished to the hot tank 500 by gravity, which can reduce costs and save the internal space of the water purifier 100.

[0071] For example, a water supply solenoid valve 810 may be provided on the water supply pipeline 800. Figure 2 shown. Figure 2 The water purifier 100 'is shown with Figure 1 The water purifier 100 shown in FIG. 1 has basically the same principle, and the only difference is that the valve provided on the water supply pipeline 800 is different. Figure 2 As shown, a water supply solenoid valve 810 is provided on the water supply pipeline 800. Figure 1 As shown, a gravity check valve 820 is provided on the water supply pipeline 800. Based on this, for the water purifier 100' Figure 1 The same or similar components as those of the water purifier 100 shown in FIG. Figure 1 The same or similar reference numerals are used for the same or similar parts, and for the sake of brevity, these same or similar parts will not be further described. The following will focus on the differences between the two. Figure 2 As shown, the control module can control the water replenishment solenoid valve 810 to control the opening time of the water replenishment solenoid valve 810 according to the water fetching time of the user after the user stops fetching water, so as to ensure that there is a sufficient amount of water in the hot tank 500. During the period when the user fetches water, the water replenishment solenoid valve 810 can be closed to prevent the temperature of the hot water in the hot tank 500 from decreasing. By setting the water replenishment solenoid valve 810, the timing of water replenishment in the hot tank 500 can be controlled as needed, and water replenishment is more flexible.

[0072] Exemplarily, the hot tank 500 may be provided with a water level detection device 550 for detecting the water level in the hot tank 500. The water level detection device may be any device for detecting the liquid level that is currently available or may appear in the future, such as a float level gauge, an infrared level gauge, an ultrasonic level gauge, or a weighing sensor. The control module is electrically connected to the water level detection device 550. Setting a preset water level lower limit can prevent the second pumping device 610 from still being turned on when the water level in the hot tank 500 is lower than the preset water level lower limit, causing the second pumping device 610 to run idle and affect the service life. The preset water level upper limit can close the water replenishment solenoid valve 810 when the water level in the hot tank 500 is high enough, cut off the water connection between the water tank 300 and the hot tank 500, and prevent the water temperature in the water tank 300 from rising when the hot tank 500 is heated.

[0073] When the water level in the hot tank 500 is lower than the preset water level lower limit and the user stops taking water (including the information of stopping taking normal temperature water and the information of stopping taking hot water), the control module can control the water replenishment solenoid valve 810 to open. When the user takes water, in order to ensure the total output of normal temperature water and to ensure that the water temperature in the hot tank 500 is high, the control module can control the water replenishment solenoid valve 810 to close, so that on the one hand, all the normal temperature water is directly output, or all is mixed with hot water and output, and the total amount will not be reduced due to the water replenishment of the hot tank 500. On the other hand, it avoids replenishing water to the hot tank 500, resulting in a decrease in the water temperature in the hot tank 500, thereby ensuring that the user can get water of the appropriate temperature in a short time when taking water. As described above, when the water level in the hot tank 500 reaches the preset water level upper limit, the control module can control the water replenishment solenoid valve 810 to close, which can not only ensure that there is enough water in the hot tank 500 for the user to take, but also make the water replenishment solenoid valve 810 close in time.

[0074] For example, in an embodiment where a water replenishment solenoid valve 810 is provided on the water replenishment pipeline 800, the water outlet 520 of the hot tank 500 may be located at the lower part of the hot tank 500. Due to the provision of the water replenishment solenoid valve 810, the water level in the hot tank 500 may change. By taking water from the lower part of the hot tank 500, it is possible to ensure that all the hot water in the hot tank 500 is taken out as much as possible, thereby providing a larger amount of hot water for the user.

[0075] For example, continue to refer to Figure 2 In the case where the normal temperature water outlet 120 and the mixed water outlet 130 are connected to the heating faucet 900, the control module is used to control the heating faucet 900 to heat at a first power lower than the rated power when the water level in the hot tank 500 is higher than the preset water level lower limit, so that the water outlet temperature of the heating faucet 900 reaches the desired water intake temperature. In order to prevent the water in the hot tank 500 from boiling and overflowing, the water in the hot tank 500 is usually heated to a preset temperature below the boiling point or a preset temperature range. Figure 3As shown, during the period 0-t1, the water level in the hot tank 500 is higher than the preset water level lower limit. At this time, the water replenishment solenoid valve 810 is not opened, and the heating faucet 900 can reheat the hot water output from the hot tank 500 with a relatively small first power, and the surplus power can be used for real-time regulation according to the output water temperature. During the period 0-t1, the water temperature in the hot tank 500 remains unchanged, but the water volume gradually decreases. At time t1, the water level in the hot tank 500 is lower than the preset water level lower limit. At this time, the hot tank 500 no longer provides hot water, and only the water tank 300 provides normal temperature water. From time t1, the heating faucet 900 can be controlled to heat with a second power higher than the first power, so that the water outlet temperature of the heating faucet 900 reaches the desired water intake temperature. At this time, the hot water output from the heating faucet 900 is completely heated by the heating faucet 900, so the water outlet flow of the heating faucet 900 decreases sharply from time t1. It can be understood that when the water level in the hot tank 500 is lower than the preset water level lower limit, if the user still needs to take hot water, the normal temperature water from the water tank 300 can only be heated by the heating faucet 900, and the second power used at this time needs to be greater than the first power. When the user takes boiled water, the heating power of the heating faucet 900 (hereinafter referred to as the faucet power) is the largest, and the second power can be its rated power or lower than the rated power. When the user does not take boiled water, the faucet power is lower than the rated power. In other words, when the user takes hot water, when the water level in the hot tank 500 is higher than the preset water level lower limit, the hot water already in the hot tank 500 is preferentially taken, and the heating faucet 900 is only used for compensating heating between the temperature in the hot tank 500 and the desired water intake temperature. The heating faucet 900 can also be used for compensating heating between the mixed water temperature and the desired water intake temperature. The mixed water temperature is the temperature after the hot water output from the hot tank 500 and the normal temperature water output from the water tank 300 are mixed. When the water level in the hot tank 500 is lower than the preset water level lower limit, the heating faucet 900 provides hot water of the desired temperature as the only heat source. In this way, the faucet power can be utilized to a greater extent, the response speed to temperature changes can be improved, and a large flow of hot water or even boiling water can be output.

[0076] In another set of embodiments, refer back to Figure 1A gravity check valve 820 that can be unidirectionally conducted along the gravity direction is provided on the water supply pipeline 800 between the water outlet 320 of the water tank 300 and the water inlet 510 of the hot tank 500. Exemplarily, a blocking block with a density less than that of water can be provided in the gravity check valve 820. When the water level in the hot tank 500 reaches the maximum value, the blocking block will cut off the waterway due to the buoyancy effect, preventing the liquid flow between the water tank 300 and the hot tank 500, thereby preventing hot water from entering the water tank 300. When the water level in the hot tank 500 drops, due to the gravity effect, the blocking block drops, and the normal temperature water in the water tank 300 can flow into the hot tank 500. Therefore, the gravity check valve 820 can automatically and timely replenish water to the hot tank 500 and prevent hot water from entering the water tank 300. In some specific embodiments, the gravity check valve 820 can be arranged in series with the water supply solenoid valve 810 on the water supply pipeline 800.

[0077] Exemplarily, when the gravity check valve 820 is used, the water outlet 520 of the hot tank 500 can be located at the upper part of the hot tank 500. It can be understood that due to the timely water replenishment of the gravity check valve 820, the water in the hot tank 500 is always full, and when the user takes hot water, the water tank 300 will also replenish the hot tank 500 with normal temperature water. According to the relationship between the specific gravity of water and its temperature, the higher the temperature of water is, the upper part of the hot tank 500 is usually located, while the lower the temperature of water is, the lower part of the hot tank 500 is usually located. In order to output as much hot water as possible, the water outlet 520 of the hot tank 500 is set at the lower part of the hot tank 500. Exemplarily, the water inlet 510 of the hot tank 500 can be located at the lower part of the hot tank 500. In order to stabilize the temperature of the hot water output from the hot tank 500 near its water outlet 520, the water inlet 510 is set at the lower part of the hot tank 500 to prevent normal temperature water and hot water from mixing and flowing out of the hot tank 500, or to prevent normal temperature water from flowing out of the water outlet 520 immediately after entering the hot tank 500.

[0078] For the embodiment in which the gravity one-way valve 820 is set, the control module is used to control the heating faucet 900 to heat with a heating power lower than the rated power during the initial water extraction period, so that the water outlet temperature of the heating faucet 900 reaches the desired water extraction temperature; in the water extraction period after the initial water extraction period, when the heating power of the heating faucet 900 is lower than the rated power, the heating faucet 900 is controlled to adjust the heating power, so that the water outlet temperature of the heating faucet 900 reaches the desired water extraction temperature; and when the heating power of the heating faucet 900 reaches the rated power, the heating faucet 900 is controlled to adjust the water extraction amount, so that the water outlet temperature of the heating faucet 900 reaches the desired water extraction temperature.

[0079] like Figure 4As shown, it can be understood that, since the water tank 300 will replenish water for the hot tank 500 in real time, the water temperature in the hot tank 500 will continue to decrease when the user takes hot water. In the figure, it is shown that the curve of the hot tank water temperature continues to decrease, causing the mixed water temperature to gradually decrease. When it reaches the moment t2', the original hot water in the hot tank 500 is all taken out, and the water taken from the hot tank 500 is actually the normal temperature water from the water tank 300. Therefore, after the moment t2', the water temperature of the hot tank remains unchanged at room temperature. Since the water temperature of the hot tank continues to decrease during the period 0-t2', it is preferred to increase the heating power of the heating faucet 900 (hereinafter referred to as the faucet power). On the one hand, this can ensure a large flow of hot water, and on the other hand, because the heating faucet 900 has a faster response speed, it is preferred to adjust the heating power of the heating faucet 900. When the tap power reaches its rated power at time t1', the tap power cannot be increased any more, and the mixed water temperature continues to decrease. From time t1', the flow rates of the first pumping device 410 and the second pumping device 610 can be adjusted to reduce the flow rate of the normal temperature water supplied by the water tank 300 and / or increase the flow rate of the hot water supplied by the hot tank 500. Specifically, in the case of Figure 1 In the embodiment shown, starting from time t1', the second pumping device 610 can be controlled to increase the flow rate to increase the flow rate of hot water outputted from the hot tank 500. When the heating faucet 900 under rated power cannot output water of the desired water intake temperature, the first pumping device 410 can be turned off to only take water from the hot tank 500, and the flow rate of the second pumping device 610 can be adjusted so that the heating faucet 900 can output hot water of the desired water intake temperature at a power not higher than the rated power. Alternatively, starting from time t1', the first pumping device 410 can be controlled to reduce the flow rate to reduce the output flow rate of normal temperature water from the water tank 300. When the first pumping device 410 is turned off to only take water from the hot tank 500, the flow rate of the second pumping device 610 is adjusted so that hot water of the desired water intake temperature can be outputted under the heating of the heating faucet 900. At this time, the output flow rate gradually decreases to a constant value. Alternatively, starting from time t1', the flow rates of the first pumping device 410 and the second pumping device 610 can be controlled simultaneously, that is, the second pumping device 610 is controlled to increase the flow rate, and the first pumping device 410 is controlled to reduce the flow rate, so that the temperature and flow rate of the mixed water can output hot water of the desired water intake temperature when the heating faucet 900 is not higher than the rated power. When the first pumping device 410 is turned off and only water is taken from the hot tank 500, the flow rate of the second pumping device 610 is adjusted, and hot water of the desired water intake temperature can be output under the heating of the heating faucet 900. In this way, the power of the heating faucet 900 can be utilized to a greater extent, the response speed to temperature changes can be improved, a large flow of hot water or even boiling water can be output, and the user experience can be improved.

[0080] Exemplarily, the hot tank 500 may also have an exhaust port 530 disposed at its upper portion and / or a drain port 540 disposed at its lower portion. The exhaust port 530 is used to communicate with the water tank 300. The exhaust port 530 can balance the internal air pressure when the hot tank 500 is filled with water and pumped out water, preventing the normal temperature water from being unable to be injected or the hot water from being unable to be pumped out due to the negative pressure in the tank. During heating, the generated water vapor can also be discharged through the exhaust port 530. A drain port 540 may also be provided at the lower portion of the hot tank 500. The water in the hot tank 500 can be completely emptied when necessary, for example, when the water purifier 100 needs to be transported or when the water in the hot tank 500 is not used for a long time or when the hot tank 500 needs to be cleaned, the water in the hot tank 500 can be completely emptied through the above-mentioned drain port 540.

[0081] An embodiment of the present invention provides a control method for a water purifier, which is applicable to any of the water purifiers described above. The control method includes: the control module controls the third pumping device 710 to work when receiving normal temperature water intake information, and controls the first pumping device 410 and the second pumping device 610 to work at a flow rate corresponding to the desired water intake temperature indicated by the hot water intake information when receiving hot water intake information.

[0082] The first pumping device 410 and the second pumping device 610 may be a pumping device with a continuously adjustable flow rate, or a pumping device with an adjustable flow rate between different gears. In the case of a continuously adjustable flow rate, the temperature of the output mixed water may be continuously adjustable, so that the temperature of the mixed water output by the mixed water outlet 130 can reach the user's desired water intake temperature more accurately. In the case of an adjustable flow rate between different gears, the temperature of the mixed water output by the mixed water outlet 130 may only be adjustable between different gears. When the number of gears of the pumping device with a continuously adjustable flow rate is more, the temperature of the mixed water output by the mixed water outlet 130 can be closer to the desired water intake temperature. When the mixed water outlet 130 is connected to an ordinary faucet, the temperature of the mixed water mixed by the normal temperature water output by the first water channel 400 and the hot water output by the second water channel 600 can be equal to the desired water intake temperature; when the mixed water outlet 130 is connected to a heating faucet 900, the temperature of the mixed water can be lower than the desired water intake temperature, and the heating faucet 900 heats the mixed water again to the desired water intake temperature.

[0083] The present application can provide normal temperature water and hot water respectively by setting the water tank 300 and the hot tank 500, and by making the flow rate of the first pumping device 410 for pumping out the normal temperature water in the water tank 300 and the second pumping device 610 for pumping out the hot water in the hot tank 500 adjustable, so that the water purifier 100 can adjust the water temperature of the output hot water within a certain range. Moreover, when the user needs normal temperature water, it can be pumped directly from the water tank 300; when the user needs hot water at a higher temperature, it can be pumped directly from the hot tank 500. Therefore, the user has a greater degree of freedom to choose, which can meet more needs of the user.

[0084] A heating faucet 900 is connected to the normal temperature water outlet 120 and the mixed water outlet 130, and the water inlet 510 of the hot tank 500 is connected to the water outlet 320 of the water tank 300 through a water supply pipeline 800, so as to be connected to the water outlet 220 of the water production module 200. In an embodiment where a water supply solenoid valve 810 is provided on the water supply pipeline 800, as shown in FIG. Figure 5 As shown, the control method also includes:

[0085] Step S1: upon receiving hot water intake information, operating both the first pumping device and the second pumping device or operating only the second pumping device, so that the outlet water temperature of the mixed water outlet is lower than the desired water intake temperature;

[0086] Step S2: Controlling the heating faucet to heat at a first power lower than its rated power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature until the water level in the hot tank is lower than a preset water level lower limit; and

[0087] Step S3: Control the heating faucet to heat with a second power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature, and the second power is greater than the first power and less than or equal to the rated power.

[0088] In order to ensure that the user can take boiled water at a large flow rate, the first operation S1 is performed. When the expected water intake temperature is relatively low but still higher than the normal temperature water, the first pumping device 410 and the second pumping device 610 can both be operated; when the expected water intake temperature is relatively high (for example, higher than the temperature of the water in the hot tank 500), only the second pumping device 610 can be operated to output hot water with a higher temperature to the heating faucet 900, so that hot water with the largest flow rate can be provided. When the water level in the hot tank 500 is higher than the preset water level lower limit, the second operation S2 is performed to reheat the hot water output by the hot tank 500 with a relatively small first power, and the surplus power can be used for real-time regulation according to the actual water outlet temperature. When the water level in the hot tank 500 is lower than the preset water level lower limit, the third operation S3 is performed to control the heating faucet 900 to heat with a second power greater than the first power, so that the water outlet temperature of the heating faucet 900 reaches the expected water intake temperature. In other words, when the user takes hot water, when the water level in the hot tank 500 is higher than the preset water level lower limit, the hot water in the hot tank 500 is used first, and the heating faucet 900 is only used to compensate for the heating between the temperature in the hot tank 500 and the desired water temperature. When the water level in the hot tank 500 is lower than the preset water level lower limit, the heating faucet 900 provides hot water of the desired temperature as the only heat source. In this way, the power of the heating faucet 900 can be utilized to a greater extent, the response speed to temperature changes can be improved, and a large flow of hot water or even boiling water can be output.

[0089] The mixed water outlet 130 is connected to a heating faucet 900, the water inlet 510 of the hot tank 500 is connected to the water outlet 320 of the water tank 300 through a water supply pipeline 800, and is connected to the water outlet 220 of the water production module 200. In an embodiment where a gravity check valve 820 is provided on the water supply pipeline 800, as shown in FIG. Figure 6 As shown, the control method includes:

[0090] Step S1': when receiving the hot water intake information, operate both the first pumping device and the second pumping device or operate only the second pumping device, so that the outlet water temperature of the mixed water outlet 130 is lower than the expected water intake temperature;

[0091] Step S2': heating the heating faucet at a heating power lower than its rated power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature;

[0092] Step S3': increasing the heating power of the heating faucet so that the outlet water temperature of the heating faucet reaches the desired water intake temperature, until the heating power of the heating faucet reaches the rated power; and

[0093] Step S4': reducing the flow rate of the first pumping device and increasing the flow rate of the second pumping device so that the outlet water temperature of the heating faucet reaches the desired water intake temperature.

[0094] Step S1' is executed, and the control module controls the first pumping device 410 and the second pumping device 610 to output a mixed water lower than the expected water intake temperature. When the expected water intake temperature is relatively low but still higher than the normal temperature water, both the first pumping device 410 and the second pumping device 610 can be operated; when the expected water intake temperature is relatively high (for example, higher than the temperature of the water in the hot tank 500), only the second pumping device 610 can be operated to output hot water with a higher temperature to the heating faucet 900, so that hot water with the largest flow rate can be provided. Then step S2' is executed to heat the heating faucet 900 with a heating power lower than its rated power so that the outlet water temperature of the heating faucet 900 reaches the expected water intake temperature. Since the hot water in the water tank 300 can be replenished into the hot tank 500 at any time through the gravity check valve 820, the water temperature in the hot tank 500 is reduced. Without reducing the water outlet flow rate, the temperature of the mixed water will gradually decrease. Then step S3' is executed to gradually increase the heating power of the heating faucet 900 until the heating faucet 900 works at the rated power. Then, step S4' is executed to reduce the flow rate of the first pumping device 410 and increase the flow rate of the second pumping device 610, thereby controlling the flow rate ratio of the normal temperature water in the water tank 300 and the hot water in the hot tank 500. In this way, the power of the heating faucet 900 can be utilized to a greater extent, the response speed to temperature changes can be improved, a larger flow rate of hot water or even boiling water can be output, and the user experience can be improved.

[0095] When the desired water intake temperature is lower than or equal to the temperature of normal temperature water, only the third pumping device 710 is controlled to operate.

[0096] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0097] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0098] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0099] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0100] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water purifier, It is characterized in that The water purifier has a raw water inlet, a normal temperature water outlet and a mixed water outlet, and comprises: A water production module, wherein the water inlet of the water production module is connected to the raw water inlet; A water tank, wherein the water inlet of the water tank is connected to the water outlet of the water production module, and the water outlet of the water tank is connected to the mixed water outlet through a first water path, and a first pumping device is provided on the first water path; A hot tank, wherein the water inlet of the hot tank is connected to the water outlet of the water production module, and the water outlet of the hot tank is connected to the mixed water outlet through a second water path, and a second pumping device is provided on the second water path; a third water path, the third water path being connected between the water outlet of the water tank and the normal temperature water outlet, and the third water path being provided with a third pumping device; and A control module, the control module is used to control the third pumping device to operate when receiving normal temperature water intake information, and to control the first pumping device and the second pumping device to operate at a flow rate corresponding to the expected water intake temperature indicated by the hot water intake information when receiving hot water intake information.

2. The water purifier according to claim 1, It is characterized in that The water purifier also includes a temperature sensor assembly for detecting the temperature in the water path. The temperature sensor assembly includes a first temperature sensor disposed on the first water path and / or the water tank, a second temperature sensor disposed on the second water path and / or the hot tank, and / or a third temperature sensor disposed between a water outlet formed by the first water path and the second water path being connected in parallel and the mixed water outlet. The control module is further configured to determine flow rates of the first pumping device and the second pumping device according to the desired water intake temperature and the temperature measured by the temperature sensor assembly.

3. The water purifier according to claim 1, It is characterized in that The normal temperature water intake information includes an expected water intake temperature input by a user that is lower than or equal to the normal temperature water temperature, and the hot water intake information includes an expected water intake temperature input by a user that is higher than the normal temperature water temperature.

4. The water purifier according to claim 1, It is characterized in that The water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline, so as to be connected to the water outlet of the water production module.

5. The water purifier according to claim 4, It is characterized in that The water tank is located above the hot tank.

6. The water purifier according to claim 5, It is characterized in that A water replenishment solenoid valve is arranged on the water replenishment pipeline.

7. The water purifier according to claim 6, It is characterized in that The hot tank is provided with a water level detection device for detecting the water level in the hot tank. The control module is used to control the water replenishment solenoid valve to open when the water level in the hot tank is lower than the preset water level lower limit and receives the user's water withdrawal stop information, and control the water replenishment solenoid valve to close when the water level in the hot tank reaches the preset water level upper limit.

8. The water purifier according to claim 6, It is characterized in that The water outlet of the hot tank is located at the lower part of the hot tank.

9. The water purifier according to claim 6, It is characterized in that The water purifier comprises a heating faucet, wherein a normal temperature water pipe and a hot water pipe in the heating faucet are connected to the normal temperature water outlet and the mixed water outlet respectively. The control module is also used to: control the heating faucet to heat at a first power lower than its rated power when the water level in the hot tank is higher than the preset water level lower limit, so that the water outlet temperature of the heating faucet reaches the desired water intake temperature; control the heating faucet to heat at a second power when the water level in the hot tank is lower than the preset water level lower limit, so that the water outlet temperature of the heating faucet reaches the desired water intake temperature, and the second power is greater than the first power and less than or equal to the rated power.

10. The water purifier according to claim 5, It is characterized in that The water supply pipeline is provided with a gravity one-way valve which can conduct water in one direction along the gravity direction.

11. The water purifier according to claim 10, It is characterized in that The water outlet of the hot tank is located at the upper part of the hot tank, and / or the water inlet of the hot tank is located at the lower part of the hot tank.

12. The water purifier according to claim 10, It is characterized in that The water purifier comprises a heating faucet, wherein a normal temperature water pipe and a hot water pipe in the heating faucet are connected to the normal temperature water outlet and the mixed water outlet respectively. The control module is also used to: control the heating faucet to heat with a heating power lower than its rated power during the water extraction period so that the water outlet temperature of the heating faucet reaches the desired water extraction temperature; control the heating faucet to adjust the heating power when the heating power of the heating faucet is lower than the rated power during the water extraction period after the water extraction period so that the water outlet temperature of the heating faucet reaches the desired water extraction temperature; and control the flow rates of the first pumping device and the second pumping device when the heating power of the heating faucet reaches the rated power so that the water outlet temperature of the heating faucet reaches the desired water extraction temperature.

13. The water purifier according to claim 1, It is characterized in that Check valves are provided on the first water channel and the second water channel.

14. The water purifier according to claim 1, It is characterized in that The water purifier further comprises a heating faucet, the mixed water outlet is used to be connected to a hot water pipe of the heating faucet, and the normal temperature water outlet is used to be connected to the normal temperature water pipe of the heating faucet.

15. The water purifier according to claim 1, It is characterized in that The hot tank also has an exhaust port disposed at its upper portion and used for communicating with the water tank and / or a drain port disposed at its lower portion.

16. A control method for a water purifier, It is characterized in that The water purifier has a raw water inlet, a normal temperature water outlet and a mixed water outlet, and the water purifier comprises: A water production module, wherein the water inlet of the water production module is connected to the raw water inlet; A water tank, wherein the water inlet of the water tank is connected to the water outlet of the water production module, and the water outlet of the water tank is connected to the mixed water outlet through a first water path, and a first pumping device is provided on the first water path; a hot tank, wherein the water inlet of the hot tank is connected to the water outlet of the water production module, the water outlet of the hot tank is connected to the mixed water outlet through a second water path, and a second pumping device is provided on the second water path; and a third water path, the third water path being connected between the water outlet of the water tank and the normal temperature water outlet, and the third water path being provided with a third pumping device, The control method comprises: The control module is used to control the third pumping device to operate when receiving normal temperature water intake information, and to control the first pumping device and the second pumping device to operate at a flow rate corresponding to the expected water intake temperature indicated by the hot water intake information when receiving hot water intake information.

17. The control method according to claim 16, It is characterized in that The normal temperature water outlet and the mixed water outlet are respectively connected to the normal temperature water pipe and the hot water pipe of the heating faucet. The water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline to be connected to the water outlet of the water production module. A water supply solenoid valve is provided on the water supply pipeline. The control method further comprises: When the hot water intake information is received, both the first pumping device and the second pumping device are operated or only the second pumping device is operated, so that the outlet water temperature of the mixed water outlet is lower than the expected water intake temperature; Controlling the heating faucet to heat at a first power lower than its rated power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature until the water level in the hot tank is lower than a preset water level lower limit; and The heating faucet is controlled to heat at a second power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature, and the second power is greater than the first power and less than or equal to the rated power.

18. The control method according to claim 16, It is characterized in that The normal temperature water outlet and the mixed water outlet are respectively connected to the normal temperature water pipe and the hot water pipe of the heating faucet. The water inlet of the hot tank is connected to the water outlet of the water tank through a water supply pipeline to be connected to the water outlet of the water production module. A gravity one-way valve is provided on the water supply pipeline. The control method comprises: When the hot water intake information is received, both the first pumping device and the second pumping device are operated or only the second pumping device is operated, so that the outlet water temperature of the mixed water outlet is lower than the expected water intake temperature; The heating faucet is heated at a heating power lower than its rated power so that the outlet water temperature of the heating faucet reaches the desired water intake temperature; Increasing the heating power of the heating faucet so that the outlet water temperature of the heating faucet reaches the desired water intake temperature, until the heating power of the heating faucet reaches the rated power; and The heating faucet is maintained at the rated power, and the flow rates of the first pumping device and the second pumping device are adjusted to make the outlet water temperature of the heating faucet reach the desired water intake temperature.

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