Water purification equipment and control method thereof

Abstract

The present invention relates to the technical field of water purification, and discloses a water purification device and a control method thereof, the water purification device comprises: a water supply module having a purified water outlet and a circulating water inlet; the heat exchange module is provided with a hot water path and a cold water path; the outlet end of the heating module is respectively communicated with the inlet end of the hot water path and a water outlet module of the water purification equipment; the cold water path communicates with the purified water outlet and the heating module; when it is judged that the water storage temperature T in the heat exchange module is smaller than or equal to the set temperature T0, the water purification equipment is controlled to be communicated with a circulation branch connected among a purified water outlet of the water supply module, the cold water path, the heating module, the hot water path and the circulation water inlet of the water supply module, and the water storage temperature T in the heat exchange module is smaller than or equal to the set temperature T0. Therefore, a heating body does not need to be additionally arranged in the heat exchange module, the heat preservation function of the heat exchange module can be achieved only through the original heating module of the system, and the purposes of simplifying the structure and saving the cost can be achieved.

Description

Technical Field

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

[0002] In order to meet people's demand for hot water at any time, many water purification equipment on the market are equipped with instant hot water faucets, creating a purification and heating all-in-one machine, which can not only produce boiling water, but also quickly reduce the hot water to the set temperature through a heat exchanger, achieving the function of quickly producing warm water or cold boiled water, which is deeply loved by users. However, in order to reduce the waiting time for users to get water, some water purification equipment usually has a heat preservation function, which requires the use of a water tank or a hot tank to store hot water, and an additional heating element is required, which is more complicated in structure and more expensive. Summary of the invention

[0003] In view of this, the present invention provides a water purification device and a control method thereof to solve the problem that the water purification device with heat preservation function in the prior art needs to add an additional heating element to realize the heat preservation function, which is costly.

[0004] In a first aspect, the present invention provides a water purification device, comprising:

[0005] A water supply module having a clean water outlet and a circulating water inlet;

[0006] The heat exchange module has a hot water circuit and a cold water circuit that are independent of each other and capable of heat exchange;

[0007] A heating module, wherein the outlet end of the heating module is respectively connected with the inlet end of the hot water circuit and the water outlet module of the water purification equipment;

[0008] The inlet end of the cold water circuit is connected to the purified water outlet, and the outlet end is connected to the inlet end of the heating module; the outlet end of the hot water circuit is selectively connected to the water outlet module and the circulating water inlet;

[0009] The water purification equipment has a water production mode, a heat preservation mode and a circulation heating mode:

[0010] When the water purification device is in the water production mode, the outlet end of the hot water circuit is switched to a state of being connected to the water outlet module and blocked from the circulating water inlet, and the heating module is in a working state;

[0011] When the water purification device is in the heat preservation mode, the heating module does not work;

[0012] When the water purification device is in a circulation heating mode, the outlet end of the hot water circuit is switched to a state of being connected to the circulating water inlet and blocked from the water outlet module, and the heating module is in a working state.

[0013] Beneficial effect: The outlet end of the hot water circuit can be selectively connected to the water outlet module and the circulating water inlet. The hot water after heat exchange by the heat exchange module can be divided into two paths. The cooked water is output through the water outlet module for users to use, or it can be returned to the water supply module through the circulating water inlet to facilitate the realization of circulating heating and large-flow boiling water functions. When water is not produced, the water purification equipment can enter the insulation mode. During the insulation process, if the water storage temperature in the heat exchange module is monitored to be lower than the set temperature, the circulation branch of the water purification outlet, cold water circuit, heating module, hot water circuit, and circulating water inlet of the water supply module connected in series can be controlled to be connected, and the heating module can be controlled to heat and enter the circulating heating mode to ensure that the water storage temperature in the heat exchange module is not lower than the set temperature, so that the heat exchange module can not only perform heat exchange, but also be used as a hot tank to store water, integrating water storage and heat exchange functions, one thing for multiple uses, further simplifying the structure, and the hot water stored in the heat exchange module is convenient for users to use later, reducing the waiting time for users to take warm boiled water, and improving the user experience. By setting up a circulating water inlet and adopting a design in which the outlet end of the hot water circuit can be selectively connected to the circulating water inlet, there is no need to add an additional heating element in the heat exchange module. The heat preservation function of the heat exchange module can be achieved by using the original heating module of the system, which can achieve the purpose of simplifying the structure and saving costs. It effectively solves the problem that water purification equipment with heat preservation function in related technologies needs to add additional heating elements to realize the heat preservation function, which is costly.

[0014] In an optional embodiment, the outlet end of the hot water circuit is selectively connected to the water outlet module and the circulating water inlet through a first dual-channel solenoid valve.

[0015] Beneficial effect: By setting up the first dual-channel solenoid valve, it is convenient to control the hot water after heat exchange in the hot water water circuit to enter the water outlet module to prepare cooked water of different temperatures, or to enter the water supply module to realize the circulation heating function, so as to ensure that the water temperature in the heat exchange module is not lower than the set temperature T0, so that the water coming out of the hot water water circuit can be divided into two paths and returned to the clean water pump for circulation, which is convenient for the subsequent entry into the heating module to realize large-flow boiled water, or directly flow into the water outlet module and mix with the boiled water in the heating module to output cooked water.

[0016] In an optional embodiment, the water supply module includes:

[0017] A clean water pump, the clean water pump has a water inlet and a clean water outlet, and the water inlet is connected to an external water source through a water inlet pipeline;

[0018] The circulating water inlet is located on the water inlet pipeline, and the first outlet of the first dual-channel solenoid valve is connected to the circulating water inlet through a reflux pipeline.

[0019] Beneficial effect: The first dual-channel solenoid valve is a one-inlet and two-outlet solenoid valve, having a first inlet, a first outlet and a second outlet. The first inlet is connected to the outlet of the hot water circuit, the first outlet is connected to the circulating water inlet through a reflux pipeline, and the second outlet is connected to the water outlet module through a pipeline. The first dual-channel solenoid valve has a first state in which the first inlet is connected to the first outlet, and a second state in which the first inlet is connected to the second outlet. When in the circulating heating mode, the first dual-channel solenoid valve switches to the first state to connect the circulating branch, and the hot water flowing out through the first outlet enters the clean water pump in turn through the reflux pipeline, the circulating water inlet, and the water inlet pipeline between the circulating water inlet and the water inlet, and is then pumped into the cold water circuit, the heating module, and the hot water circuit of the heat exchange module in turn through the clean water pump to realize circulating heating.

[0020] In an optional embodiment, the first dual-channel solenoid valve further has a first inlet and a second outlet;

[0021] The outlet of the hot water circuit is connected to the first inlet through a first pipeline, and the second outlet is connected to the water outlet module through a second pipeline.

[0022] In an optional embodiment, the heat exchange module includes:

[0023] The heat exchange inner tube has an internal flow channel forming a hot water circuit;

[0024] The heat exchange outer tube, the heat exchange inner tube is sleeved inside the heat exchange outer tube, and the flow channel between the heat exchange inner tube and the heat exchange outer tube constitutes a cold water circuit;

[0025] The inner diameter of the outer heat exchange tube is set to d1, and the inner diameter of the inner heat exchange tube is set to d2, wherein 3.5d2≥d1≥2.5d2.

[0026] Beneficial effect: The heat exchange module is based on the shell and tube heat exchanger structure. The hot and cold fluids are respectively passed through the inner and outer tubes. In the normal boiled water mode, the hot water passes through the inner heat exchange tube, and the cooling water passes through the outer heat exchange tube, achieving instant cooling, thereby achieving non-contact heat exchange and temperature change of the two fluids. By designing the inner diameter d1 of the outer heat exchange tube and the inner diameter d2 of the inner heat exchange tube within the ratio range of 3.5d2≥d1≥2.5d, the heat exchange module can not only perform heat exchange, but also greatly increase the water storage capacity, and can also be used as a water tank or hot tank for water storage. The heat exchange module integrates water storage and heat exchange functions, and has multiple uses, further simplifying the structure.

[0027] In an optional implementation, d1=3d2.

[0028] Beneficial effect: By making the inner diameter of the heat exchange outer tube three times the inner diameter of the heat exchange inner tube, the size of the cold water channel is approximately twice that of the hot water channel. Compared with the existing design in which the cold water channel and the hot water channel have the same size, the water storage capacity of the heat exchange module is greatly increased after the diameter of the heat exchange outer tube is increased. However, the larger the diameter of the heat exchange outer tube, the worse the heat exchange capacity will be. Therefore, this embodiment sets the cold water channel to twice the size of the hot water channel, which can not only ensure sufficient water storage capacity, but also ensure the heat exchange capacity of the heat exchange module when achieving a large flow of boiling water and continuous water extraction of more than 1.5L, ensuring that the whole machine can efficiently prepare 45-100℃ cooked water.

[0029] In an optional embodiment, the water purification device further comprises:

[0030] The regulating valve is arranged upstream of the water outlet module and is used to adjust the boiling water ratio distributed to the heat exchange module and the water outlet module according to the target water outlet temperature set by the user.

[0031] In an optional embodiment, the water outlet module includes a water outlet nozzle, and the regulating valve has a first regulating water inlet, a second regulating water inlet, and a regulating water outlet;

[0032] Among them, the first regulating water inlet is connected to the outlet end of the hot water circuit, the second regulating water inlet is connected to the water outlet end of the heating module, and the regulating water outlet is connected to the inlet of the water outlet nozzle.

[0033] Beneficial effect: Through the setting regulating valve, part of the boiled water after being boiled by the heating module flows to the water outlet through the regulating valve, and the other part is input into the hot water circuit of the heat exchange module, and is cooled down by heat exchange with the normal temperature purified water in the cold water circuit to form low-temperature cooked water, and then flows to the water outlet through the regulating valve. The mixing ratio of boiled water and low-temperature cooked water is controlled by the regulating valve, which can meet the user's demand for boiled water at different temperatures.

[0034] In an optional embodiment, the heating module includes a heating element and a first temperature sensing package, and the first temperature sensing package is used to detect the heating temperature of the heating element.

[0035] Beneficial effect: The first temperature sensing package can monitor the heating temperature of the heating element, thus avoiding the problem of not being able to discover in time when the heating temperature of the heating element is abnormal.

[0036] In an optional embodiment, the heat exchange module further includes a second temperature sensing package, and the second temperature sensing package is used to detect the temperature of the stored water in the heat exchange module.

[0037] Beneficial effect: The second temperature sensing package can monitor the water temperature in the heat exchange module to ensure that the water temperature in the heat exchange module is not lower than the set temperature in the insulation mode.

[0038] In a second aspect, the present invention further provides a control method for a water purification device applied to any of the above embodiments, the control method comprising the following steps:

[0039] Enter the insulation mode and monitor the water temperature T in the heat exchange module in real time;

[0040] When it is determined that the water storage temperature T in the heat exchange module is ≤ the set temperature T0, the circulation branch connected between the clean water outlet of the water supply module, the cold water circuit, the heating module, the hot water circuit, and the circulating water inlet of the water supply module is controlled to be turned on, and the heating module is controlled to start and enter the circulation heating mode.

[0041] Beneficial effect: In the insulation mode, the heat transfer temperature of the water and air in the heat exchange module will decrease. In this mode, all components will not operate. When the water temperature in the heat exchange module drops to the set temperature T0, the circulation branch is turned on and the circulation heating mode is entered, thereby ensuring that the water in the heat exchange module is not lower than the T0 temperature, so that the heat exchange module can be used as a hot tank to store hot water. In this way, when the user subsequently takes warm boiled water, the heat of the water stored in the heat exchange module can be directly used, so that the initial temperature of the water to be heated in the heating module is increased, and the water to be heated can be quickly heated to 100°C, thereby shortening the waiting time for users to take warm boiled water and improving the user experience.

[0042] In an optional embodiment, the cyclic heating mode specifically includes:

[0043] Control the water supply module to drive the water in the cold water circuit and the hot water circuit to circulate into the heating module for heating according to the set flow rate Q0, and stop heating when the water temperature in the cold water circuit and the hot water circuit reaches the set temperature T1;

[0044] Among them, T1>T0.

[0045] Beneficial effect: During the insulation process, when it is detected that the water temperature of the heat exchange module is ≤70℃, the circulation heating mode is entered. The water purification pump pushes the hot water in the heat exchange module into the heating element according to the flow rate of Q0. After being heated to 100℃ by the heating element, it circulates through the cold water circuit and the hot water circuit in turn, thereby raising the water temperature of the heat exchange module to the set temperature T1, making it convenient for subsequent users to quickly use warm boiled water.

[0046] In an optional embodiment, the temperature T0 is set to 70°C; the temperature T1 is set to 80°C to 90°C; and / or the flow rate Q0 is set to 1 L / min; and / or the power of the heating module is 2100w.

[0047] In an optional implementation, the control method further includes the following steps:

[0048] Receive water production signal;

[0049] Controlling the outlet end of the hot water circuit to switch to a state where the outlet end is connected to the water outlet module and blocked from the circulating water inlet;

[0050] Control the heating module to start and begin water production.

[0051] In an optional implementation, the water production signal includes a boiling water production signal, and the control method further includes the following steps:

[0052] Receive water boiling signal;

[0053] The heating module is controlled to start, and the regulating valve is used to control the boiling water heated by the heating module to flow to the water outlet module for users to take.

[0054] In an optional embodiment, the clean water outlet of the water supply module is selectively connected to the inlet end of the heat exchange module and the inlet end of the heating module through a second dual-channel solenoid valve;

[0055] After receiving the water boiling signal and before controlling the heating module to start, the following steps are performed:

[0056] Determine whether the water temperature T in the heat exchange module is greater than the set temperature T0;

[0057] If yes, the clean water outlet of the water supply module is controlled to switch to a state of being connected to the cold water circuit of the heat exchange module and the heating module;

[0058] At the same time, the water supply module is controlled to deliver the normal temperature purified water to the cold water circuit according to the first set flow rate Q1, and after heat exchange with the hot water in the hot water circuit to increase the temperature, it is delivered to the heating module for heating;

[0059] If not, the purified water outlet of the water supply module is controlled to be directly switched to a state of being connected to the heating module;

[0060] At the same time, the water supply module is controlled to directly deliver the normal temperature purified water to the heating module for heating according to the second set flow rate Q2;

[0061] The second set flow rate Q2 is smaller than the first set flow rate Q1.

[0062] In an optional implementation, the water production signal includes a cooked water production signal, and the control method specifically includes the following steps:

[0063] Receive water making signal;

[0064] Get the target water outlet temperature set by the user;

[0065] Control the conduction of the water supply module, the cold water circuit of the heat exchange module, the heating module, and the water outlet module;

[0066] At the same time, the outlet end of the hot water circuit is controlled to switch to a state of being connected to the water outlet module and blocked from the circulating water inlet, and then the heating module is controlled to start;

[0067] And according to the target water outlet temperature, the boiled water heated by the heating module is controlled to be distributed to the hot water path and the water outlet module of the heat exchange module according to the set ratio, so that part of the boiled water heated by the heating module flows into the hot water path for heat exchange cooling, and the other part directly flows into the water outlet module and is mixed with the warm water after heat exchange flowing out of the hot water path to the target water outlet temperature for user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0069] Figure 1 This is a schematic diagram of the principles of each module of the water purification device according to the first embodiment of the present invention;

[0070] Figure 2 This is a detailed structural diagram of each module of the water purification equipment according to the first embodiment of the present invention;

[0071] Figure 3 Schematic diagram of water flow direction when the circulation branch of the water purifier is turned on when the water purifier is in the circulation heating mode according to the first embodiment of the present invention (the dotted line in the figure is the circulation branch);

[0072] Figure 4 This is a schematic diagram of the water flow direction of the water purification device in the first implementation mode of the present invention in the water production mode (large flow boiling water mode);

[0073] Figure 5 This is a schematic diagram of the water flow direction of the water purification device in the first implementation mode of the embodiment of the present invention in the water production mode (cooked water mode);

[0074] Figure 6 This is a schematic diagram of the water flow direction of a water purification device in a second implementation mode (a second dual-channel solenoid valve and an eighth pipeline are added compared to the first implementation mode) in an embodiment of the present invention in a water production mode (continuous boiling water extraction mode);

[0075] Figure 7 Schematic diagram of the structure of the heat exchange module in an embodiment of the present invention.

[0076] Description of reference numerals:

[0077] 10. Water supply module; 101. Clean water outlet; 102. Circulating water inlet; 11. Clean water pump; 12. Water inlet pipeline; 13. Return pipeline;

[0078] 20, heat exchange module; 21, hot water circuit; 22, cold water circuit; 201, heat exchange outer tube; 2010, serpentine channel; 202, heat exchange inner tube;

[0079] 30. Heating module; 31. Heating element; 32. First temperature sensing package;

[0080] 40. water outlet module; 41. regulating valve; 42. water outlet nozzle;

[0081] 50. A first dual-channel solenoid valve;

[0082] 60. Second dual-channel solenoid valve;

[0083] 1a, first pipeline; 2a, second pipeline; 3a, third pipeline; 4a, fourth pipeline; 5a, fifth pipeline; 6a, sixth pipeline; 7a, seventh pipeline; 8a, eighth pipeline. DETAILED DESCRIPTION

[0084] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0085] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0086] According to an embodiment of the present invention, on the one hand, the present invention provides a water purification device, including a water supply module 10, a heat exchange module 20, and a heating module 30, wherein the water supply module 10 has a purified water outlet 101 and a circulating water inlet 102; the heat exchange module 20 has a hot water waterway 21 and a cold water waterway 22 which are independent of each other and capable of heat exchange; the outlet end of the heating module 30 is respectively connected to the inlet end of the hot water waterway 21 and the water outlet module 40 of the water purification device; the inlet end of the cold water waterway 22 is connected to the purified water outlet 101, and the outlet end is connected to the inlet end of the heating module 30; the outlet end of the hot water waterway 21 is selectively connected to the water outlet module 40 and the circulating water inlet 102; the water purification device has a water making mode, a heat preservation mode and a circulating heating mode: Figures 4 to 5As shown, when the water purification device is in the water production mode, the outlet end of the hot water circuit 21 is switched to a state of being connected to the water outlet module 40 and blocked from the circulating water inlet 102, and the heating module 30 is in a working state; when the water purification device is in the heat preservation mode, the heating module 30 is not working; Figure 3 As shown, when the water purification equipment is in the circulation heating mode, the outlet end of the hot water water circuit 21 is switched to a state of being connected to the circulating water inlet 102 and blocked from the water outlet module 40, and the heating module 30 is in a working state; and when the water purification equipment is in the circulation heating mode, the circulation branch connected in sequence along the water flow direction between the purified water outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, the hot water circuit 21, and the circulating water inlet 102 of the water supply module 10 is in a conducting state.

[0087] In the above embodiment, the outlet end of the hot water circuit 21 can be selectively connected to the water outlet module 40 and the circulating water inlet 102. The hot water after heat exchange by the heat exchange module 20 can be divided into two paths, and the cooked water can be output through the water outlet module 40 for users to take, or it can be returned to the water supply module 10 through the circulating water inlet 102 to facilitate the realization of circulating heating and large-flow boiling water functions. When water is not being produced, the water purification equipment can enter the insulation mode. During the insulation process, if it is monitored that the water temperature in the heat exchange module 20 is lower than the set temperature, the circulation branch connected in series in the water purification outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, the hot water circuit 21, and the circulating water inlet 102 of the water supply module 10 can be controlled to be turned on, and the heating module 30 can be controlled to heat up and enter the circulation heating mode to ensure that the water temperature in the heat exchange module 20 is not lower than the set temperature, so that the heat exchange module 20 can not only perform heat exchange, but also be used as a hot tank to store water, integrating water storage and heat exchange functions into one, with multiple uses, further simplifying the structure, and the hot water stored in the heat exchange module 20 is convenient for users to use later, reducing the waiting time for users to get warm water, and improving the user experience.

[0088] By setting up the circulating water inlet 102 and adopting the design of selectively connecting the outlet end of the hot water waterway 21 to the circulating water inlet 102, there is no need to add an additional heating element 31 in the heat exchange module 20. The heat preservation function of the heat exchange module 20 can be achieved by only using the original heating module 30 of the system, which can achieve the purpose of simplifying the structure and saving costs. It effectively solves the problem that the water purification equipment with heat preservation function in the related technology needs to add an additional heating element 31 to realize the heat preservation function, which is costly.

[0089] Combination Figure 1 and Figure 4 and Figure 5 As shown, when the water purification device is in water making mode, it can prepare boiled water and cooked water, wherein, Figure 4 To determine the direction of water flow when preparing boiled water. Figure 5 As for the water flow direction when preparing cooked water, when the user chooses to prepare boiled water, the boiled water branch connected in sequence along the water flow direction between the clean water outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, and the water outlet module 40 is in a conducting state, and the heating module 30 is started. After the water is heated to 100°C, it directly flows to the water outlet module 40 through the boiled water branch for the user to use; when the user chooses to prepare cooked water, the boiled water branch connected in sequence between the heating module 30, the hot water circuit 21, and the water outlet module 40, and the boiled water branch are all in a conducting state, and the heating module 30 is started. Part of the boiled water heated to 100°C by the heating module 30 flows to the water outlet module 40 through the boiled water branch, and the other part flows to the water outlet module 40 through the boiled water branch after heat exchange and cooling, and is mixed with the boiled water in the boiled water branch to the set temperature for the user to use.

[0090] In some embodiments, the heat exchange module 20 includes an inner heat exchange tube 202 and an outer heat exchange tube 201, and the internal flow channel of the inner heat exchange tube 202 constitutes a hot water circuit 21; the inner heat exchange tube 202 is inserted into the outer heat exchange tube 201, and the flow channel between the inner heat exchange tube 202 and the outer heat exchange tube 201 constitutes a cold water circuit 22; the inner diameter of the outer heat exchange tube 201 is set to d1, and the inner diameter of the inner heat exchange tube 202 is set to d2, wherein 3.5d2≥d1≥2.5d2.

[0091] In the above embodiment, the heat exchange module 20 is based on the shell-and-tube heat exchanger structure, and the hot and cold fluids are respectively passed through the inner and outer tubes. In the normal boiled water mode, the hot water passes through the inner heat exchange tube 202, and the cooling water passes through the outer heat exchange tube 201, so as to achieve instant cooling, thereby achieving non-contact heat exchange between the two fluids to change the temperature. By designing the inner diameter d1 of the outer heat exchange tube 201 and the inner diameter d2 of the inner heat exchange tube 202 within the ratio range of 3.5d2≥d1≥2.5d, the heat exchange module 20 can not only perform heat exchange, but also greatly increase the water storage capacity, and can also be used as a water tank or hot tank to store hot water. The heat exchange module 20 integrates the functions of water storage and heat exchange, and has multiple uses, further simplifying the structure.

[0092] Preferably, d1=3d2. By setting the inner diameter of the heat exchange outer tube 201 to three times the inner diameter of the heat exchange inner tube 202, the size of the cold water channel 22 is approximately twice that of the hot water channel 21. Compared with the existing design in which the cold water channel 22 and the hot water channel 21 have the same size, the water storage capacity of the heat exchange module 20 is greatly increased after the diameter of the heat exchange outer tube 201 is increased. However, the larger the diameter of the heat exchange outer tube 201, the worse the heat exchange capacity will be. Therefore, in this embodiment, by setting the cold water channel 22 to be twice that of the hot water channel 21, it can ensure sufficient water storage capacity and ensure the heat exchange capacity of the heat exchange module 20 when achieving a large flow of boiling water and continuously taking more than 1.5L of water, thereby ensuring that the whole machine can efficiently prepare 45-100℃ cooked water.

[0093] In some embodiments, in combination Figure 1 , Figure 2 , Figure 7 As shown, the heat exchange inner tube 202 adopts a serpentine tube, and the heat exchange outer tube 201 adopts a spliced ​​shell structure. The heat exchange outer tube 201 has two half shells that are interlocked with each other. At least one of the two half shells is provided with a serpentine channel 2010. The serpentine heat exchange inner tube 202 is embedded in the serpentine channel 2010 of one half shell, and then the other half shell is buckled to form a closed flow channel. There is a set gap between the serpentine channel 2010 and the heat exchange inner tube 202, and the gap constitutes a cold water channel 22.

[0094] In this embodiment, the boiled water heated by the heating module 30 can flow out directly through the water outlet module 40, and the user can directly use the boiled water; or the boiled water heated by the heating module 30 can be mixed with the boiled water directly coming out of the heating module 30 to a set temperature after being heat exchanged by the heat exchange module 20 for use by the user; or, the boiled water heated by the heating module 30 circulates in a circulation branch formed by connecting the clean water outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, the hot water circuit 21, and the circulating water inlet 102 of the water supply module 10 in sequence, so as to realize the heat preservation function.

[0095] In some embodiments, Figures 1 to 3 As shown, the outlet end of the hot water circuit 21 is selectively connected to the water outlet module 40 and the circulating water inlet 102 via the first dual-channel solenoid valve 50 .

[0096] In the above embodiment, by setting up the first dual-channel solenoid valve 50, it is convenient to control the hot water after heat exchange in the hot water water circuit 21 to enter the water outlet module 40 to prepare cooked water at different temperatures, or to enter the water supply module 10 to realize the circulation heating function, so as to ensure that the water temperature in the heat exchange module 20 is not lower than the set temperature T0, so that the water coming out of the hot water water circuit 21 can be divided into two paths and returned to the clean water pump 11 for circulation, which is convenient for the subsequent entry into the heating module 30 to realize large-flow boiled water, or directly flow into the water outlet module 40 and mix with the boiled water in the heating module 30 to output cooked water.

[0097] In some embodiments, the water supply module 10 includes a clean water pump 11, which has a water inlet and a clean water outlet 101, and the water inlet is connected to an external water source through an inlet pipe 12; the circulating water inlet 102 is located on the inlet pipe 12, and the first outlet of the first dual-channel solenoid valve 50 is connected to the circulating water inlet 102 through a return pipe 13.

[0098] In the above embodiment, the first dual-channel solenoid valve 50 is a one-inlet and two-outlet solenoid valve having a first inlet, a first outlet and a second outlet. The first inlet is connected to the outlet of the hot water circuit 21, the first outlet is connected to the circulating water inlet 102 through a reflux pipe 13, and the second outlet is connected to the water outlet module 40 through a pipe. The first dual-channel solenoid valve 50 has a first state in which the first inlet is connected to the first outlet, and a second state in which the first inlet is connected to the second outlet. When the circulating heating mode is performed, the first dual-channel solenoid valve 50 switches to the first state to connect the circulating branch. The hot water flowing out through the first outlet enters the clean water pump 11 in sequence through the reflux pipe 13, the circulating water inlet 102, and the water inlet pipe 12 between the circulating water inlet 102 and the water inlet, and then is pumped into the cold water circuit 22, the heating module 30, and the hot water circuit 21 of the heat exchange module 20 in sequence through the clean water pump 11 to realize circulating heating. The entire circulation branch is heated by circulating the boiling water heated by the heating module 30 through the provided reflux pipeline 13 , so as to ensure the temperature of the water stored in the heat exchange module 20 .

[0099] It should be noted that, in this embodiment, the water supply module 10 includes a water supply system with a filter element for real-time water purification or a water supply system without a filter element and without real-time purification. The water purification pump 11 is preferably a water purification micro pump.

[0100] In some embodiments, the first dual-channel solenoid valve 50 also has a first inlet and a second outlet; the outlet of the hot water circuit 21 is connected to the first inlet through a first pipeline 1a, and the second outlet is connected to the water outlet module 40 through a second pipeline 2a.

[0101] In some embodiments, the purified water outlet 101 is connected to the inlet of the cold water circuit 22 via a third pipe 3 a , and the outlet of the cold water circuit 22 is connected to the inlet of the heating module 30 via a fourth pipe 4 a .

[0102] In some alternative embodiments, such as Figure 6 As shown, in this embodiment, the purified water outlet 101 is selectively connected to the inlet end of the heat exchange module 20 and the inlet end of the heating module 30 through the second dual-channel solenoid valve 60 .

[0103] In the above embodiment, by setting up the second dual-channel solenoid valve 60, it is convenient to switch and control the water flowing out of the clean water outlet 101 of the water supply module 10 to enter the cold water path 22 of the heat exchange module 20, or directly enter the heating module 30 for heating.

[0104] In some embodiments, the second dual-channel solenoid valve 60 has a second inlet, a third outlet, and a fourth outlet; the clean water outlet 101 is connected to the second inlet through the first pipe section of the third pipeline 3a, the third outlet is connected to the inlet of the cold water circuit 22 through the second pipe section of the third pipeline 3a, and the fourth outlet is connected to the fourth pipeline 4a through the eighth pipeline 8a. Along the water flow direction, the fourth pipeline 4a includes a first pipe section located between the outlet of the cold water circuit 22 and the eighth pipeline 8a, and a second pipe section located between the eighth pipeline 8a and the inlet of the heating module 30.

[0105] In the above embodiment, the second dual-channel solenoid valve 60 is a one-inlet and two-outlet type solenoid valve, and the second dual-channel solenoid valve 60 has a third state in which the second inlet is connected to the third outlet, and a fourth state in which the second inlet is connected to the fourth outlet. When the circulation heating mode is performed, the first dual-channel solenoid valve 50 is switched to the first state, and the second dual-channel solenoid valve 60 is switched to the third state to conduct the entire circulation branch. When the circulation heating mode is performed, by switching the second dual-channel solenoid valve 60 to a state in which the clean water pump 11, the cold water circuit 22, and the heating module 30 are connected, the circulating water can enter the heating module 30 for heating after flowing through the cold water circuit 22 of the heat exchange module 20. Compared with directly entering the heating module 30 for heating through the eighth pipeline 8a, the heat loss is reduced, the heat in the heat exchange module 20 can be fully utilized, and the purpose of energy saving is achieved, the heating speed is faster, and the insulation effect is better.

[0106] In some embodiments, the water purification device further includes a regulating valve 41, which is disposed upstream of the water outlet module 40 and is used to adjust the boiling water ratio distributed to the heat exchange module 20 and the water outlet module 40 according to the target water outlet temperature set by the user.

[0107] In some embodiments, the water outlet module 40 includes a water outlet 42, and the regulating valve 41 is arranged upstream of the water outlet 42, for adjusting the water outlet temperature of the water outlet 42, and the regulating valve 41 has a first regulating water inlet, a second regulating water inlet, and a regulating water outlet; wherein, the first regulating water inlet is connected to the outlet end of the hot water circuit 21, the second regulating water inlet is connected to the water outlet end of the heating module 30, and the regulating water outlet is connected to the inlet of the water outlet 42.

[0108] In the above embodiment, through the regulating valve 41 that is set, a part of the boiled water after being boiled by the heating module 30 flows to the water outlet 42 through the regulating valve 41, and the other part is input into the hot water circuit 21 of the heat exchange module 20, and is cooled by heat exchange with the normal temperature purified water in the cold water circuit 22 to form low-temperature cooked water, and flows to the water outlet 42 through the regulating valve 41. The mixing ratio of boiled water and low-temperature cooked water is controlled by the regulating valve 41, which can meet the user's demand for boiled water at different temperatures.

[0109] Specifically, the regulating valve 41 is of stepless regulating type, the outlet of the heating module 30 is connected to the second regulating water inlet through the fifth pipeline 5a, and the fifth pipeline 5a is connected to the inlet of the hot water circuit 21 through the sixth pipeline 6a. The boiled water after being boiled by the heating module 30 can flow to the regulating valve 41 through the fifth pipeline 5a, or can also flow to the hot water circuit 21 through the sixth pipeline 6a for cooling and then flow to the regulating valve 41 through the second pipeline 2a. The proportion of boiled water flowing into the sixth pipeline 6a, i.e., the hot water circuit 21, can be controlled by the provided regulating valve 41. For example, the boiled water heated by the heating module 30 can be controlled to flow into the sixth pipeline 6a, cooled by the heat exchange module 20, and then flow out from the water outlet module 40 for user use, or half of the boiled water can be controlled to flow into the water outlet 42 through the fifth pipeline 5a, and the other half of the boiled water can flow into the heat exchange module 20 through the sixth pipeline 6a for cooling and cooling. The regulating water outlet is connected to the water outlet nozzle 42 via a seventh pipe 7a.

[0110] Specifically, the fifth pipeline 5a includes a first pipe section located between the heating module 30 and the sixth pipeline 6a, and a second pipe section located between the sixth pipeline 6a and the regulating valve 41. The circulation branch sequentially connects the clean water outlet 101 of the clean water pump 11, the second dual-channel solenoid valve 60, the cold water circuit 22, the heating module 30, the hot water circuit 21, the first dual-channel solenoid valve 50, and the circulating water inlet 102 of the clean water pump 11. Specifically, in combination with Figure 2 , Figure 3 As shown, the circulation branch includes the third pipeline 3a, the fourth pipeline 4a, the first pipe section of the fifth pipeline 5a, the sixth pipeline 6a, the first pipeline 1a and the return pipeline 13, and the water inlet pipeline 12 located between the circulating water inlet 102 and the clean water pump 11.

[0111] In some embodiments, the heating module 30 includes a heating element 31 and a first temperature sensing bag 32, the first temperature sensing bag 32 is used to detect the heating temperature of the heating element 31; and / or, the heat exchange module 20 also includes a second temperature sensing bag, the second temperature sensing bag is used to detect the water storage temperature in the heat exchange module 20.

[0112] In the above embodiment, the first temperature sensing package 32 is provided to monitor the heating temperature of the heating element 31, thereby avoiding the problem of not being able to promptly detect abnormal conditions in the heating temperature of the heating element 31. The second temperature sensing package is provided to monitor the water temperature in the heat exchange module 20, thereby ensuring that the water temperature in the heat exchange module 20 is not lower than the set temperature in the insulation mode.

[0113] Preferably, the heating module 30 is an instant heating element 31 having the functions of rapid, stable heating and adjustable power. After purified water with different parameters is input into the heating element 31, the control system starts the heating element 31 according to the sensor parameters and adjusts the corresponding power parameters to heat the purified water to boiling point.

[0114] Specifically, the heating element 31 includes a heating tube with a heating channel therein, and water is heated when flowing through the heating channel. The first temperature sensing bag 32 is arranged downstream of the heating element 31. The second temperature sensing bag can be arranged in the heat exchange outer tube 201 or in the heat exchange inner tube 202, or can be arranged at the water outlet of the heat exchange outer tube 201 and the heat exchange inner tube 202; or, in some more preferred embodiments, there are two second temperature sensing bags, and the two second temperature sensing bags are respectively arranged in the heat exchange outer tube 201 and the heat exchange inner tube 202, and the water storage temperature or real-time temperature of the heat exchange module 20 is based on the average value of the temperatures detected by the two second temperature sensing bags, and the temperature measurement is more accurate.

[0115] Furthermore, the water purification device has a large flow boiling water mode and a continuous boiling water mode, a large flow boiling water branch of the water purification device and a continuous boiling water branch, wherein, in combination with Figure 4 As shown, the high-flow boiling water branch is connected to the clean water pump 11, the cold water circuit 22, the heating module 30, the regulating valve 41, and the water outlet 42 in sequence. Specifically, along the water flow direction, the high-flow boiling water branch includes the water inlet pipeline 12, the third pipeline 3a, the fourth pipeline 4a, the fifth pipeline 5a, and the seventh pipeline 7a. Figure 6 As shown, the continuous boiling water branch is connected to the clean water pump 11, the second dual-channel solenoid valve 60, the heating module 30, the regulating valve 41, and the water outlet 42 in sequence. Specifically, along the water flow direction, the continuous boiling water branch includes the water inlet pipeline 12, the third pipeline 3a, the eighth pipeline 8a, the second pipe section of the fourth pipeline 4a, the fifth pipeline 5a, and the seventh pipeline 7a.

[0116] The specific structure and principle of the water purification equipment of this embodiment are introduced below.

[0117] The water purification device provided in this embodiment includes a water supply module 10, a heating module 30, a heat exchange module 20, a control module and related supporting structures.

[0118] Specifically, the water supply module 10, the heating module 30, and the heat exchange module 20 have one or more water inlet ends and water outlet ends. The water inlet end of the water supply module 10 is connected to the raw water source, and the clean water outlet end of the water supply module 10 has a clean water outlet 101, and the clean water outlet 101 is connected to the second dual-channel solenoid valve 60. One outlet of the second dual-channel solenoid valve 60 is connected to the inlet of the cold water circuit 22 of the heat exchange module 20, and the outlet of the cold water circuit 22 is connected to the water inlet end of the heating module 30. The heating module 30 The first water outlet is connected to the inlet of the hot water circuit 21 of the heat exchange module 20, the second water outlet of the heating module 30 is connected to the second regulating water inlet of the regulating valve 41, the outlet of the heat exchange inner tube 202 is connected to the circulating water inlet 102 of the clean water pump 11 via the first dual-channel solenoid valve 50, and the boiling water circulation can be used to heat the entire pipeline to ensure that the stored water temperature is boiling water. The heat exchange inner tube 202 is connected to the first regulating water inlet via the first dual-channel solenoid valve 50, and the water outlet of the regulating valve 41 is connected to the water outlet 42 of the whole machine.

[0119] Furthermore, the water supply module 10 has different system characteristics according to the quality of the raw water. When the raw water is of drinking water quality, the water supply module 10 may be without a purification system, and only the normal temperature purified water is transported from the water outlet of the water supply module 10 to the water inlet of the heat exchange outer tube 201 of the heat storage heat exchange module 20, the water outlet of the heat exchange outer tube 201, the heating module 30, the water inlet of the heat exchange inner tube 202, the water outlet of the heat exchange inner tube 202, and the water outlet 42 through a conveying device (such as a pressure-stabilizing pump); when the raw water quality is non-drinking water quality, the water supply module 10 may have a corresponding purification system to transport the purified water from the water outlet of the water supply module 10 to the water inlet of the heat exchange outer tube 201 of the heat storage heat exchange module 20, the water outlet of the heat exchange outer tube 201, the heating module 30, the water inlet of the heat exchange inner tube 202, the water outlet of the heat exchange inner tube 202, and the water outlet 42; ... The raw water quality purification meets the drinking standard. The purification system can have a single or combined form of a pretreatment module and a deep treatment module. The pretreatment realizes the preliminary filtration of the water to remove pollutants such as sediment, rust, and residual chlorine. It can be a combination or composite form of a primary filter element and an activated carbon filter element. The primary filter element can be a PP cotton filter element or an ultrafiltration filter element. The activated carbon filter element can be a granular activated carbon, carbon fiber or carbon rod filter element; the deep treatment module realizes the deep filtration of the water to remove heavy metals, microorganisms and other toxic and harmful substances. It can be a combination of ultrafiltration, nanofiltration or reverse osmosis filtration modules. The room temperature outlet water of the purification system can be transported to the water inlet end of the heating module 30 and the cooling water inlet of the heat exchange module 20 through the conveying equipment and the dual-channel solenoid valve.

[0120] Furthermore, the heat exchange module 20 may be in the form of a casing, immersion or other structural forms. Preferably, the heat exchange module 20 is a casing heat exchange structure (for example, during operation, boiling clean water and multi-temperature clean water are respectively input into the water inlet end of the heat exchange inner tube 202 and the water inlet end of the heat exchange outer tube 201, and the boiling clean water and the multi-temperature clean water are separated by a heat-conducting material. The boiling clean water is cooled down and the multi-temperature clean water is heated up by heat transfer. The control module controls the operating parameters (for example, flow rate, contact time, etc.) of the heat exchange module 20 and the power of the heating element 31 and the opening and closing degree of the regulating valve 41 by detecting the corresponding clean water parameters (for example, water temperature, flow rate, etc.) and multi-temperature clean water parameters (temperature, volume, etc.), so as to realize Timely delivery of fresh boiled water at different temperature ranges and flow rates is realized. In this embodiment, the heat exchange module 20 integrates the functions of water storage and heat exchange. The heat exchange module 20 is based on the shell and tube heat exchanger structure, and the cold and hot fluids are respectively passed through the inner and outer tubes, thereby realizing non-contact heat exchange and temperature change of the two fluids; by optimizing the size and structural design of the heat exchange module 20, both water storage and heat exchange can be achieved. In the boiled water function, hot water passes through the hot water water path 21 inside the shell, and cooling water passes through the hot water water path 21 outside the shell, realizing instant cooling. In the large-flow boiled water function, normal temperature water passes through the cold water water path 22 and exchanges heat with the hot water stored in the hot water water path 21 to realize instant preheating and temperature rise.

[0121] Furthermore, the heating module 30 has a power-adjustable heating element 31, which can be a PTC heating element, a rare earth thick film heating element, or a metal heating tube, etc. The purified water in contact with the heating element 31 is heated and boiled by heating, and the heating power of the heating element 31 is controlled and adjusted by the control module according to the detected sensor parameters. The system can change the water inlet temperature of the heat exchange inner tube 202 by adjusting the power of the heating element 31 or the pump flow, thereby realizing the continuous supply of cooked water.

[0122] Furthermore, the water supply module 10 provides normal temperature purified water required for drinking. After being pressurized by the water purification pump 11, the purified water enters the heat exchange outer tube 201 at a set flow rate and then enters the heating module 30. After being boiled by the heating module 30, a part of it flows to the outlet of the water outlet nozzle 42 through the regulating valve 41, and the other part is input to the water inlet end of the heat exchange inner tube 202. After heat exchange and cooling with normal temperature purified water in the heat exchange module 20, it flows to the outlet of the water outlet nozzle 42 through the regulating valve 41. The low-temperature cooked water and boiled water are mixed in proportion through the regulating valve 41 to meet the user's different temperature boiled water needs. The control system collects relevant sensor parameters according to the user's different temperature and flow boiled water needs, and then controls the water supply parameters, heating parameters, and heat exchange parameters to achieve the required boiled water output.

[0123] Furthermore, the control module senses the operating parameters and environmental parameters of various sensors (for example, the first temperature sensing package 32 provided at the heating module 30, the second temperature sensing package provided in the heat exchange module 20, the temperature sensor provided at the water outlet 42, and the water level sensor provided in the water tank of the whole machine), and selects different control logics to run according to user needs, starts and stops the corresponding conveying equipment, and adjusts the operating parameters of different modules to output boiled water to meet user needs. The control module can control the output power or start time of the raw water self-priming pump, the start and stop or output power of the water purification pump 11, the output power of the heating element 31, etc., to realize functions such as large-flow boiled water and cooked water supply.

[0124] According to an embodiment of the present invention, on the other hand, a control method applied to the above water purification equipment is provided, Figures 1 to 4 As shown, the control method includes the following steps:

[0125] Step S101: Enter the insulation mode and monitor the water temperature T in the heat exchange module 20 in real time;

[0126] Step S102: When it is determined that the water storage temperature T in the heat exchange module 20 is ≤ the set temperature T0, the circulation branch connected between the clean water outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, the hot water circuit 21, and the circulating water inlet 102 of the water supply module 10 is controlled to be turned on, and the heating module 30 is controlled to start and enter the circulation heating mode.

[0127] In the above embodiment, in the insulation mode, the heat transfer temperature of the stored water and the air in the heat exchange module 20 will decrease, and all components in this mode will not operate. When the temperature of the stored water in the heat exchange module 20 drops to the set temperature T0, the circulation branch is turned on and the circulation heating mode is entered, thereby ensuring that the stored water in the heat exchange module 20 is not lower than the T0 temperature, so that the heat exchange module 20 can be used as a hot tank to store hot water. In this way, when the user subsequently takes warm boiled water, the heat of the water stored in the heat exchange module 20 can be directly used, so that the initial temperature of the water to be heated in the heating module 30 is increased, and the water to be heated can be quickly heated to 100°C, thereby shortening the waiting time for the user to take warm boiled water and improving the user's experience.

[0128] In some embodiments, the cyclic heating mode specifically includes:

[0129] The water supply module 10 is controlled to drive the water in the cold water channel 22 and the hot water channel 21 to circulate into the heating module 30 for heating according to the set flow rate Q0, and the heating is stopped when the water temperatures in the cold water channel 22 and the hot water channel 21 both reach the set temperature T1;

[0130] Among them, T1>T0.

[0131] In the above embodiment, during the insulation process, when it is detected that the water temperature of the heat exchange module 20 is ≤70°C, the circulation heating mode is entered, and the water purification pump 11 pushes the hot water in the heat exchange module 20 into the heating element 31 according to the flow rate of Q0. After being heated to 100°C by the heating element 31, it circulates through the cold water circuit 22 and the hot water circuit 21 in turn, thereby improving the water temperature of the heat exchange module 20, making it convenient for subsequent users to quickly take warm boiled water.

[0132] In some preferred embodiments, the set temperature T0 is 70°C; the set temperature T1 is 80°C to 90°C; the set flow rate Q0 is 1 L / min; and the power of the heating module 30 is 2100w.

[0133] When the user does not take water, when the second temperature sensing package detects that the water in the heat exchange outer tube 201 of the heat exchange module 20 is ≤70℃, the first dual-channel solenoid valve 50 and the second dual-channel solenoid valve 60 are both cut into the circulation branch, and the clean water pump 11 draws and pushes the 70℃ hot water in the inner and outer tubes at a flow rate of 1L / min, and heats it to 100℃ boiling water through the 2100w heating element 31, and then circulates and heats the water in the inner and outer tubes to stop heating until the temperature is all T1. When the user takes boiled water and detects that the water temperature in the heat exchange module 20 is greater than 70℃, 1L / min of pure water is controlled to flow through the heat exchange outer tube 201, and the water in the heat exchange inner tube 202 is heated to 70℃ in a non-contact manner, and then it is instantly boiled to 100℃ and flows out through the 2100w heating element 31, achieving continuous taking of boiled water with a large flow rate of more than 1.0L / min, solving the problem of small boiled water flow rate.

[0134] In some embodiments, the control method further comprises the following steps:

[0135] Step S201: receiving a water production signal;

[0136] Step S202: Control the outlet end of the hot water circuit 21 to switch to a state of being connected to the water outlet module 40 and blocked from the circulating water inlet 102;

[0137] Step S203: Control the heating module 30 to start and start making water.

[0138] In the above embodiment, when the water purification equipment is producing water normally, the first dual-channel solenoid valve 50 switches the outlet end of the hot water circuit 21 to a state where it is connected to the water outlet module 40 and blocked from the circulating water inlet 102, and the heating module 30 is used to heat and prepare cooked water or boiling water; when the insulation circulation heating is performed, the first dual-channel solenoid valve 50 switches the outlet end of the hot water circuit 21 to a state where it is connected to the circulating water inlet 102 and blocked from the water outlet module 40, and the heating module 30 is used to store water in the circulating heating heat exchange module 20. There is no need to add an additional heating element 31 to the heat exchange module 20, and the insulation function of the heat exchange module 20 can be achieved by using the original heating module 30 of the system, thereby achieving the purpose of simplifying the structure and saving costs.

[0139] In the present embodiment, when water is not being produced, the water purification device can enter the insulation mode. During the insulation process, if it is monitored that the stored water temperature in the heat exchange module 20 is lower than the set temperature, the circulation branch of the purified water outlet 101 of the water supply module 10, the cold water circuit 22, the heating module 30, the hot water circuit 21, and the circulating water inlet 102 of the water supply module 10, which are connected in series in sequence, can be controlled to be turned on, and the heating module 30 can be controlled to heat up and enter the circulation heating mode to ensure that the stored water temperature in the heat exchange module 20 is not lower than the set temperature. Therefore, when the user takes boiled water or cooked water, the heat of the stored water in the heat exchange module 20 can be fully utilized, so that the water inlet temperature of the heating module 30 is increased, and the heating time of the heating module 30 is shortened, thereby reducing the waiting time for the user to take cooked water or boiled water, improving the user's experience, achieving large flow rate of boiled water or cooked water, and avoiding problems such as small flow rate, long waiting time, and lower water temperature during the process of taking boiled water or cooked water.

[0140] In some embodiments, the water production signal includes a water boiling signal, and the control method further includes the following steps:

[0141] Step S301: receiving a water boiling signal;

[0142] Step S302: Control the heating module 30 to start, and control the regulating valve 41 to allow all the boiled water heated by the heating module 30 to flow to the water outlet module 40 for the user to take.

[0143] In the above embodiment, when the user wants to prepare boiled water, the first dual-channel solenoid valve 50 switches the outlet end of the hot water circuit 21 to a state where it is connected to the water outlet module 40 and blocked from the circulating water inlet 102, so that the circulating branch is in a non-conductive state, and then the opening ratio of the hot water circuit 21 flowing into the heat exchange module 20 is controlled by the regulating valve 41 to be 0, so that all the boiled water heated by the heating module 30 flows to the water outlet module 40 for the user to take.

[0144] In some embodiments, after receiving the water boiling signal and before controlling the heating module 30 to start, the following steps are further performed:

[0145] Step S401: determining whether the water temperature T in the heat exchange module 20 is greater than the set temperature T0;

[0146] If yes, then execute step S402 and step S403 in sequence; if no, then execute step S404 and step S405 in sequence;

[0147] Step S402: Control the purified water outlet 101 of the water supply module 10 to switch to a state of being connected to the cold water path 22 of the heat exchange module 20 and the heating module 30;

[0148] Step S403: Control the water supply module 10 to deliver the normal temperature purified water to the cold water channel 22 at the first set flow rate Q1, and after heat exchange with the hot water in the hot water channel 21 to increase the temperature, deliver it to the heating module 30 for heating;

[0149] Step S404: Control the purified water outlet 101 of the water supply module 10 to directly switch to a state of being connected to the heating module 30;

[0150] Step S405: simultaneously controlling the water supply module 10 to directly deliver the normal temperature purified water to the heating module 30 for heating according to the second set flow rate Q2;

[0151] The second set flow rate Q2 is smaller than the first set flow rate Q1.

[0152] In the above embodiment, when a user's signal for taking boiled water is received, if it is determined that the water temperature in the heat exchange module 20 is greater than the set temperature T0, the water purification device enters a high-flow boiled water mode, and controls the water supply module 10 to transport pure water through the cold water circuit 22 to the flow heating module 30 to be heated to the boiling point for the user to use. Since the higher-temperature water stored in the cold water circuit 22 can be directly transported to the heating module 30 for heating, and the room-temperature purified water pushed into the cold water circuit 22 can also exchange heat with the high-temperature hot water in the hot water circuit 21, the initial water temperature of the water entering the heating module 30 can be increased, and the time for the heating module 30 to boil water can be shortened. Therefore, in order to make full use of the stored water and the stored water heat in the heat exchange module 20, the water supply module 10 can operate at a relatively large Q1 flow rate to achieve the effect of taking boiled water at a large flow rate, improve the user experience, and solve the problem of small boiled water flow rate. If it is determined that the water temperature in the heat exchange module 20 is ≤ the set temperature T0, the water purification equipment enters the continuous boiling water extraction mode, and controls the water supply module 10 to transport the pure water with a relatively small Q2 flow rate directly from the eighth pipeline 8a to the flow heating module 30 to heat it to the boiling point for users to use, thereby achieving the effect of continuous boiling water extraction and avoiding the problem of intermittent boiling water. When the water temperature in the heat exchange module 20 is low, water extraction is continuous, which can solve the problem of multiple people having to wait for water extraction and poor user experience.

[0153] Furthermore, the first set flow rate Q1 is 1L / min; the power of the heating module 30 is 2100w. When it is detected that the water temperature in the heat exchange module 20 is greater than 70°C, the user takes boiled water and controls 1L / min of pure water to flow through the heat exchange outer tube 201. After the boiled water in the heat exchange inner tube 202 is heated non-contactly, it is instantly boiled to 100°C by the 2100w heating element 31 and flows out, achieving continuous taking of boiled water at a large flow rate of more than 1.0L / min, solving the problem of small boiled water flow rate.

[0154] Specifically, when the user takes water, the second temperature sensing package detects that the water temperature of the heat exchange module 20 is greater than 70°C, the second dual-channel solenoid valve 60 and the regulating valve 41 are switched to the large-flow boiled water branch, and the clean water pump 11 pushes the normal temperature clean water into the heat exchange outer tube 201 at a flow rate of 1L / min to exchange heat with the hot water in the heat exchange inner tube 202 and raise the temperature to 70°C, and then the hot water flows out through the 2100w heating element 31 to heat it to 100°C.

[0155] In this embodiment, the insulation mode can be started when the user is not taking water to achieve idle heating. The heat exchange module 20 stores water, and large-flow continuous water withdrawal is achieved when taking boiled water. When taking boiled water, the stored water temperature and the temperature of the heating module 30 are combined, and the water supply flow of the water purification pump 11, the heating power of the heating element 31 and other parameters are controlled through a specific algorithm to achieve continuous water withdrawal with a large flow rate of more than 1.0L / min, thereby solving the problem of small boiled water flow rate.

[0156] In this embodiment, the insulation mode can be started when the user is not taking water to achieve idle heating. The heat exchange module 20 stores water, and large-flow continuous water withdrawal is achieved when taking boiled water. When taking boiled water, the stored water temperature and the temperature of the heating module 30 are combined, and the water supply flow of the water purification pump 11, the heating power of the heating element 31 and other parameters are controlled through a specific algorithm to achieve continuous water withdrawal with a large flow rate of more than 1.0L / min, thereby solving the problem of small boiled water flow rate.

[0157] Further, in some embodiments, the second set flow rate Q2 is 0.4L / min. In the continuous boiling water extraction mode, the heating module 30 heats the pure water flowing through with a power of 2100w, and the flow rate of the water purification pump 11 is 0.4L / min. Specifically, when the user takes boiling water, when the second temperature sensing package detects that the water temperature in the heat exchange module 20 is ≤70°C, the second dual-channel solenoid valve 60 and the regulating valve 41 are switched to the continuous boiling water extraction branch, and the water purification pump 11 pushes the normal temperature purified water into the 2100w heating element 31 at a flow rate of 0.4L / min to heat it to 100°C and the boiling water flows out.

[0158] In some embodiments, the water production signal includes a cooked water production signal, and the control method specifically includes the following steps:

[0159] Step S501: receiving a boiled water signal;

[0160] Step S502: Obtain the target water outlet temperature set by the user;

[0161] Step S503: Control the water supply module 10, the cold water path 22 of the heat exchange module 20, the heating module 30, and the water outlet module 40 to be connected;

[0162] Step S505: simultaneously controlling the outlet end of the hot water circuit 21 to switch to a state where it is connected to the water outlet module 40 and blocked from the circulating water inlet 102, and then controlling the heating module 30 to start;

[0163] Step S506: According to the target water outlet temperature, the boiled water heated by the heating module 30 is controlled to be distributed to the hot water path 21 of the heat exchange module 20 and the water outlet module 40 according to the set ratio, so that a part of the boiled water heated by the heating module 30 flows into the hot water path 21 for heat exchange cooling, and the other part directly flows into the water outlet module 40 and is mixed with the warm water after heat exchange flowing out of the hot water path 21 to the target water outlet temperature for user use.

[0164] In the above embodiment, when the user takes cooked water, since the water temperature in the cold water circuit 22 and the hot water circuit 21 is above T0, there is no cold water in the heat exchange module 20, which can not only shorten the heating time of the heating module 30 and reduce the waiting time for the user to take water, but also avoid the problem of low outlet water temperature caused by the cold water mixed in the hot water circuit 21 of the heat exchange module 20 when preparing cooked water, ensuring that the first cup of water taken by the user is at the set temperature, improving the user experience, and effectively solving the problem of low temperature when the user takes the first cup of cooked water, affecting the user experience.

[0165] The heat exchange module 20 provided in this embodiment has water storage and heat exchange functions, which is equivalent to a hot tank and a heat exchanger. Combined with the logic control method to control the start and stop of different system components, it can realize the instantaneous supply of large-flow boiling water and cooked water, which is in line with the drinking water habits of Chinese people. In addition, the water is taken continuously, which can solve the problem of water interruption and waiting when multiple people take water.

[0166] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall all fall within the protection scope of the embodiments of the present application.

Claims

1. A water purification device, It is characterized in that include: A water supply module (10) having a clean water outlet (101) and a circulating water inlet (102); The heat exchange module (20) has a hot water circuit (21) and a cold water circuit (22) which are independent of each other and capable of heat exchange; A heating module (30), wherein the outlet end of the heating module (30) is respectively connected to the inlet end of the hot water circuit (21) and the water outlet module (40) of the water purification equipment; The inlet end of the cold water circuit (22) is connected to the purified water outlet (101), and the outlet end is connected to the inlet end of the heating module (30); the outlet end of the hot water circuit (21) is selectively connected to the water outlet module (40) and the circulating water inlet (102); The water purification equipment has a water production mode, a heat preservation mode and a circulation heating mode: When the water purification device is in water production mode, the outlet end of the hot water circuit (21) is switched to a state where it is connected to the water outlet module (40) and blocked from the circulating water inlet (102), and the heating module (30) is in a working state; When the water purification device is in the heat preservation mode, the heating module (30) does not work; When the water purification device is in a circulation heating mode, the outlet end of the hot water circuit (21) is switched to a state where it is connected to the circulation water inlet (102) and blocked from the water outlet module (40), and the heating module (30) is in an operating state.

2. The water purification device according to claim 1, It is characterized in that The outlet end of the hot water circuit (21) is selectively connected to the water outlet module (40) and the circulating water inlet (102) via a first dual-channel solenoid valve (50).

3. The water purification device according to claim 2, It is characterized in that The water supply module (10) comprises: A clean water pump (11), the clean water pump (11) having a water inlet and the clean water outlet (101), the water inlet being connected to an external water source via a water inlet pipeline (12); The circulating water inlet (102) is located on the water inlet pipeline (12), and the first outlet of the first dual-channel solenoid valve (50) is connected to the circulating water inlet (102) via a return pipeline (13).

4. The water purification device according to claim 3, It is characterized in that The first dual-channel solenoid valve (50) also has a first inlet and a second outlet; The outlet of the hot water circuit (21) is connected to the first inlet via a first pipeline (1a), and the second outlet is connected to the water outlet module (40) via a second pipeline (2a).

5. The water purification device according to any one of claims 1 to 4, It is characterized in that The heat exchange module (20) comprises: A heat exchange inner tube (202), the inner flow passage of which constitutes the hot water circuit (21); A heat exchange outer tube (201), the heat exchange inner tube (202) being sleeved inside the heat exchange outer tube (201), and the flow channel between the heat exchange inner tube (202) and the heat exchange outer tube (201) forming the cold water circuit (22); The inner diameter of the heat exchange outer tube (201) is set to d 1 The inner diameter of the heat exchange inner tube (202) is d 2 , among which, 3.5d 2 ≥d 1 ≥ 2.5 days 2 .

6. The water purification device according to any one of claims 1 to 4, It is characterized in that The water purification equipment also includes: The regulating valve (41) is arranged upstream of the water outlet module (40) and is used to adjust the ratio of boiled water distributed to the heat exchange module (20) and the water outlet module (40) according to the target water outlet temperature set by the user.

7. The water purification device according to claim 6, It is characterized in that The water outlet module (40) comprises a water outlet nozzle (42), and the regulating valve (41) comprises a first regulating water inlet, a second regulating water inlet, and a regulating water outlet; The first regulating water inlet is connected to the outlet end of the hot water circuit (21), the second regulating water inlet is connected to the water outlet end of the heating module (30), and the regulating water outlet is connected to the inlet of the water outlet nozzle (42).

8. The water purification device according to any one of claims 1 to 4, It is characterized in that The heating module (30) comprises a heating element (31) and a first temperature sensing package (32), wherein the first temperature sensing package (32) is used to detect the heating temperature of the heating element (31); And / or, the heat exchange module (20) further comprises a second temperature sensing package, wherein the second temperature sensing package is used to detect the temperature of stored water in the heat exchange module (20).

9. A control method for a water purification device according to any one of claims 1 to 8, It is characterized in that The control method comprises the following steps: Entering the insulation mode, monitoring the water temperature T in the heat exchange module (20) in real time; When it is determined that the water temperature T in the heat exchange module (20) is less than or equal to the set temperature T 0 When the heating module (30) is turned on, the circulation branch connected between the clean water outlet (101) of the water supply module (10), the cold water circuit (22), the heating module (30), the hot water circuit (21), and the circulating water inlet (102) of the water supply module (10) is controlled to be turned on, and the heating module (30) is controlled to start, thereby entering the circulation heating mode.

10. The control method of the water purification device according to claim 9, It is characterized in that The cycle heating mode specifically includes: Control the water supply module (10) according to the set flow rate Q 0 The water in the cold water circuit (22) and the hot water circuit (21) is driven to circulate into the heating module (30) for heating until the water temperature in the cold water circuit (22) and the hot water circuit (21) reaches the set temperature T 1 Stop heating when Among them, T 1 >T 0 .

11. The control method of the water purification device according to claim 10, It is characterized in that The set temperature T 0 70℃; And / or, the set temperature T 1 80℃~90℃; And / or, the set flow rate Q 0 1L / min; And / or, the power of the heating module (30) is 2100W.

12. The control method of the water purification device according to any one of claims 9 to 11, It is characterized in that The control method further comprises the following steps: Receive water production signal; Controlling the outlet end of the hot water circuit (21) to switch to a state where it is connected to the water outlet module (40) and blocked from the circulating water inlet (102); The heating module (30) is controlled to start and water production begins.

13. The control method of the water purification device according to claim 12, It is characterized in that The water production signal includes a water boiling signal, and the control method further includes the following steps: Receive water boiling signal; The heating module (30) is controlled to start, and the regulating valve (41) is used to control all the boiled water heated by the heating module (30) to flow to the water outlet module (40) for users to take.

14. The control method of the water purification device according to claim 13, It is characterized in that The purified water outlet (101) of the water supply module (10) is selectively connected to the inlet end of the heat exchange module (20) and the inlet end of the heating module (30) via a second dual-channel solenoid valve (60); After receiving the water boiling signal and before controlling the heating module (30) to start, the following steps are also performed: Determine whether the water temperature T in the heat exchange module (20) is greater than the set temperature T 0 ; If so, the purified water outlet (101) of the water supply module (10) is controlled to switch to a state of being connected to the cold water path (22) of the heat exchange module (20) and the heating module (30); At the same time, the water supply module (10) is controlled to flow at a first set flow rate Q 1 The purified water at room temperature is transported to the cold water circuit (22), and after heat exchange with the hot water in the hot water circuit (21) to increase the temperature, it is then transported to the heating module (30) for heating; If not, the purified water outlet (101) of the water supply module (10) is controlled to directly switch to a state of being connected to the heating module (30); At the same time, the water supply module (10) is controlled to flow at a second set flow rate Q 2 Directly conveying the purified water at room temperature to the heating module (30) for heating; Among them, the second set flow rate Q 2 Less than the first set flow rate Q 1 .

15. The control method of the water purification device according to claim 12, It is characterized in that The water production signal includes a cooked water production signal, and the control method specifically includes the following steps: Receive water making signal; Get the target water outlet temperature set by the user; Controlling the conduction of the water supply module (10), the cold water circuit (22) of the heat exchange module (20), the heating module (30), and the water outlet module (40); At the same time, the outlet end of the hot water circuit (21) is controlled to switch to a state where it is connected to the water outlet module (40) and blocked from the circulating water inlet (102), and then the heating module (30) is controlled to start; The hot water heated by the heating module (30) is controlled to be distributed to the hot water path (21) of the heat exchange module (20) and the water outlet module (40) according to a set ratio according to the target water outlet temperature.

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