Preheating type large-flux water boiler and water heating method

Abstract

The invention relates to a preheating type large-flux water boiler and a water heating method.The preheating type large-flux water boiler comprises an electric control device and a circulation heating module, the circulation heating module comprises an instant heating module and a water circulation assembly used for making water in the circulation heating module circularly pass through the instant heating module, and the circulation heating module is provided with an outer water inlet part and an outer water outlet part; the outer water inlet part is connected with a water inlet valve used for controlling external new water to enter the cyclic heating module, the outer water outlet part is provided with a reversing valve assembly, the electric control device is electrically connected with the instant heating module and the reversing valve assembly, and the electric control device guides water flow to circulate in the cyclic heating module or discharge the water flow outwards through the reversing valve assembly. The circulating heating module can preheat water before a user needs boiled water, and when the user needs, the instant heating module can heat water with relatively high temperature in the circulating heating module, so that the waiting time of the user is relatively shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of water boilers, and in particular to a preheating large-flux water boiler and a water heating method. Background Art

[0002] Existing water boilers generally heat room temperature water directly to boiling water. Due to the large temperature difference between room temperature water and boiling water, and the relatively fixed power of the water boiler, users need to wait for a relatively long time, or the water boiler cannot normally provide sufficient and hot water in a relatively short time, affecting the user experience.

[0003] Therefore, further improvement is needed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a preheating large-flow water boiler that can relatively shorten the waiting time of users, while also relatively increasing the maximum boiled water output and improving the user experience.

[0005] The object of the present invention is achieved like this: A preheating type large-flow water boiler includes an electronic control device and a circulation heating module. The circulation heating module includes an instant heating module and a water circulation assembly for circulating water in the circulation heating module through the instant heating module. The circulation heating module has an external water inlet and an external water outlet. The external water inlet is connected to a water inlet valve for controlling the entry of new external water into the circulation heating module. The external water outlet is provided with a reversing valve assembly. The electronic control device is electrically connected to the instant heating module and the reversing valve assembly respectively. The electronic control device guides the water flow to circulate in the circulation heating module or to be discharged to the outside through the reversing valve assembly.

[0006] As a specific solution, the circulating heating module also includes a water tank, which has a water tank outlet, a new water inlet and a circulating water inlet. The external water inlet is arranged at the new water inlet of the water tank. The water tank outlet of the water tank is connected to the water inlet of the instant heating module. The water outlet of the instant heating module is connected to the water inlet of the reversing valve assembly. The reversing valve assembly has a first water outlet and a second water outlet for supplying water to the outside. The first water outlet of the reversing valve assembly is connected to the circulating water inlet of the water tank.

[0007] As a specific solution, a water tank temperature control probe and a water level probe are provided in the water tank, the water inlet valve is a water inlet solenoid valve, and the electronic control device is electrically connected to the water inlet solenoid valve, the water tank temperature control probe and the water level probe respectively.

[0008] As a specific solution, the water outlet and / or outlet end of the instant heating module is provided with a circulating water temperature control probe, and the circulating water temperature control probe is electrically connected to the electronic control device.

[0009] As a specific solution, the circulating heating module further includes a water outlet pump and a step regulating valve. The water outlet end of the water storage tank is connected to the water inlet end of the water outlet pump. The water outlet end of the water outlet pump is connected to the water inlet end of the step regulating valve. The water outlet end of the step regulating valve is connected to the water inlet end of the instant heating module. A flow meter is provided between the water outlet end of the step regulating valve and the water inlet end of the instant heating module. The electric control device is electrically connected to the flow meter, the water outlet pump, and the step regulating valve respectively.

[0010] As a specific solution, a water tank heating pipe is further provided in the water storage tank. The electric control device is electrically connected to the water tank heating pipe.

[0011] In order to heat boiling water more efficiently, the present invention also discloses a method for heating water, including the above-mentioned preheating water dispenser. The preheating water dispenser heats water according to the following steps: Step 1: Power on and preset the preheating temperature of the water storage tank. Detect the water level in the water storage tank through the water level probe. When the water level in the water storage tank does not reach the preset position, the water inlet solenoid valve opens until the water level rises to the preset position. When the water level in the water storage tank reaches the preset position, the water inlet solenoid valve closes. The water tank temperature control probe detects the water temperature in the water storage tank. When the water temperature in the water storage tank does not reach the preheating temperature, enter Step 2. When the water temperature in the water storage tank reaches the preheating temperature, enter Step 3.

[0012] Step 2: The water outlet pump and the instant heating module start to work. The first water outlet end of the reversing valve assembly is conducted, and the second water outlet end of the reversing valve assembly is cut off. Water flows in the circulating heating module. When the water temperature in the water storage tank reaches the preheating temperature, enter Step 3.

[0013] Step 3: Set the required outlet water temperature and required water output of the user and start the water outlet instruction. The water tank temperature control probe detects the water temperature in the water storage tank. When the water temperature in the water storage tank is lower than the preheating temperature, enter Step 4. When the water temperature in the water storage tank is greater than or equal to the preheating temperature, enter Step 5.

[0014] Step 4: The first water outlet end of the reversing valve assembly is conducted, and the second water outlet end of the reversing valve assembly is cut off. The instant heating module and the water outlet pump start to work. Water flows in the circulating heating module until the water tank temperature control probe detects that the water temperature is greater than or equal to the preheating temperature, then enter Step 5.

[0015] Step 5: The first water outlet end of the reversing valve assembly is conducted, and the second water outlet end of the reversing valve assembly is cut off. The instant heating module and the water outlet pump start to work. The electric control device controls the opening degree of the step regulating valve and the power of the instant heating module according to the preset outlet water temperature and water output. When the circulating water temperature control probe detects that the water temperature is greater than the preset outlet water temperature, enter Step 6.

[0016] Step 6: The first water outlet end of the reversing valve assembly is cut off, the second water outlet end of the reversing valve assembly is conducted, the flow meter starts to count, and after reaching the set flow rate, the water outlet pump stops working and the preheating water dispenser stops discharging water.

[0017] As a specific solution, when the water temperature detected by the water tank temperature control probe in Step 3 is 5°C lower than the preheating temperature, it enters Step 4.

[0018] When the water temperature detected by the water tank temperature control probe in Step 3 and Step 4 is more than 5°C higher than the preheating temperature, it enters Step 5.

[0019] When the water temperature detected by the circulating water temperature control probe in Step 5 is more than 2°C higher than the preset water outlet temperature, it enters Step 6.

[0020] It can be set to the circulating heating mode in Step 2. In the circulating heating mode, Step 2 does not enter Step 3.

[0021] In order to reduce noise during cold start and extend the service life of the instant heating module and the water outlet pump, the present invention also discloses a method for heating water, including the above-mentioned preheating water dispenser. The preheating water dispenser heats water according to the following steps: Step 1: Power on and preset the preheating temperature of the storage tank. Detect the water level in the storage tank through the water level probe. When the water level in the storage tank does not reach the preset position, the inlet solenoid valve opens until the water level rises to the preset position; when the water level in the storage tank reaches the preset position, the inlet solenoid valve closes, and the water tank temperature control probe detects the water temperature in the storage tank; When the water temperature value detected by the water tank temperature control probe in Step 1 is lower than the preheating temperature and the temperature difference between the two is greater than or equal to the temperature difference threshold, Step 1 enters the cold start mode. In the cold start mode, the water tank heating tube starts to work, and the instant heating module and the water outlet pump remain shut down until the water temperature in the storage tank reaches the preheating temperature and enters Step 3; When the water temperature value detected by the water tank temperature control probe in Step 1 is lower than the preheating temperature and the temperature difference between the two is less than the temperature difference threshold, Step 1 enters Step 2; Step 2: The water outlet pump and the instant heating module start to work. The first water outlet end of the reversing valve assembly is conducted, the second water outlet end of the reversing valve assembly is cut off, and the water flows in the circulating heating module. When the water temperature in the storage tank reaches the preheating temperature, it enters Step 3; Step 3: Set the required water outlet temperature and the required water output of the user and start the water outlet instruction. The water tank temperature control probe detects the water temperature in the storage tank. When the water temperature in the storage tank is lower than the preheating temperature, it enters Step 4; when the water temperature in the storage tank is greater than or equal to the preheating temperature, it enters Step 5; Step 4: The first water outlet end of the reversing valve assembly is conducted, the second water outlet end of the reversing valve assembly is cut off, the instant heating module and the water outlet pump start to work, and the water flows in the circulating heating module until the water tank temperature control probe detects that the water temperature is greater than or equal to the preheating temperature and enters Step 5; Step 5: The first water outlet end of the reversing valve assembly is conducted, and the second water outlet end of the reversing valve assembly is cut off. That is, the heating module and the water outlet pump start to work. The electronic control device controls the opening degree of the step regulating valve and the power of the instant heating module according to the preset water outlet temperature and water output. When the circulating water temperature control probe detects that the water temperature is greater than the preset water outlet temperature, it enters Step 6; Step 6: The first water outlet end of the reversing valve assembly is cut off, and the second water outlet end of the reversing valve assembly is conducted. The flow meter starts to count. After reaching the set flow rate, the water outlet pump stops working, and the preheating water dispenser stops discharging water; The temperature difference threshold is 10°C.

[0022] As a specific solution, when the water temperature detected by the water tank temperature control probe in Step 3 is 5°C lower than the preheating temperature, it enters Step 4.

[0023] When the water temperature detected by the water tank temperature control probe in Step 3 and Step 4 is 5°C higher than the preheating temperature, it enters Step 5.

[0024] When the water temperature detected by the circulating water temperature control probe in Step 5 is 2°C higher than the preset water outlet temperature, it enters Step 6.

[0025] It can be set to the circulating heating mode in Step 2. In the circulating heating mode, Step 2 does not enter Step 3.

[0026] The beneficial effects of the present invention are: The circulating heating module can preheat the water temperature before the user needs boiling water. When the user needs boiling water, the instant heating module can heat the relatively high-temperature water in the circulating heating module, thereby relatively shortening the waiting time of the user. At the same time, since the water temperature in the circulating heating module is relatively high, the instant heating module with the same power can heat out more boiling water, enabling the water dispenser to relatively increase the maximum boiling water output. The instant heating module realizes large-flux water output without the need to additionally increase power, improving the user experience. Description of the Drawings

[0027] Figure 1 Schematic diagram of the usage state of the first embodiment of the present invention Figure 1 。

[0028] Figure 2 Schematic diagram of the usage state of the first embodiment of the present invention Figure 2 。

[0029] Figure 3 Schematic diagram of the usage state of the first embodiment of the present invention Figure 3 。

[0030] Figure 4 Flow chart of the first embodiment of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the second embodiment of the present invention.

[0032] Figure 6 It is a schematic structural diagram of the third embodiment of the present invention.

[0033] Figure 7 It is a schematic flow diagram of the third embodiment of the present invention. Specific embodiments

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] The first embodiment: Refer to Figures 1-4 , this preheating type large-capacity water dispenser includes an electric control device and a circulating heating module. The circulating heating module includes an instant heating module and a water circulation component for circulating the water in the circulating heating module through the instant heating module 1. The circulating heating module has an external water inlet and an external water outlet. The external water inlet is connected with a water inlet valve 2 for controlling the entry of external fresh water into the circulating heating module. The external water outlet is provided with a reversing valve assembly 3. The electric control device is electrically connected to the instant heating module 1 and the reversing valve assembly 3 respectively. The electric control device guides the water flow to circulate in the circulating heating module or be discharged outward through the reversing valve assembly 3. The circulating heating module can preheat the water temperature before the user demands boiling water. When the user demands boiling water, the instant heating module 1 can heat the relatively high-temperature water in the circulating heating module, thereby relatively shortening the waiting time of the user. At the same time, because the water temperature in the circulating heating module is relatively high, the instant heating module 1 with the same power can heat out more boiling water, enabling the water dispenser to relatively increase the maximum boiling water output and improving the user experience.

[0036] When the water circulates in the circulating heating module, the water temperature will gradually increase, enabling relatively high-temperature water to continuously flow in the circulating heating module, achieving a certain disinfection and sterilization effect.

[0037] Furthermore, the circulating heating module further includes a water storage tank 4. The water storage tank 4 has a water tank water outlet end 41, a fresh water inlet end 42, and a circulating water inlet end 43. The external water inlet is arranged at the fresh water inlet end 42 of the water storage tank 4. The water tank water outlet end 41 of the water storage tank 4 is connected to the water inlet end of the instant heating module 1. The water outlet end of the instant heating module 1 is connected to the water inlet end of the reversing valve assembly 3. The reversing valve assembly 3 has a first water outlet end 31 and a second water outlet end 32 for supplying water outward. The first water outlet end 31 of the reversing valve assembly 3 is connected to the circulating water inlet end 43 of the water storage tank 4. The water storage tank 4 can further increase the water storage capacity of the circulating heating module, enabling the water dispenser to store more relatively high-temperature warm water and further increasing the maximum boiling water output.

[0038] Further, a water tank temperature control probe 45 and a water level probe 46 are provided in the water storage tank 4. The inlet valve 2 is an inlet solenoid valve, and the electric control device is electrically connected to the inlet solenoid valve, the water tank temperature control probe 45, and the water level probe 46 respectively.

[0039] The water tank temperature control probe 45 can more accurately detect whether the water temperature in the water storage tank 4 reaches the preset preheating temperature.

[0040] The water level probe 46 can detect the water storage volume in the water storage tank 4 to avoid the situation of dry burning.

[0041] Further, a circulating water temperature control probe 11 is provided at the water outlet end and / or the water inlet end of the instant heating module 1. The circulating water temperature control probe 11 is electrically connected to the electric control device to improve the detection of the water temperature passing through the instant heating module 1 and make the accuracy of the detected water outlet temperature of the device higher.

[0042] Further, the circulating heating module further includes a water outlet pump 51 and a step regulating valve 52. The water tank outlet end 41 of the water storage tank 4 is connected to the water inlet end of the water outlet pump 51. The water outlet end of the water outlet pump 51 is connected to the water inlet end of the step regulating valve 52. A flow meter 53 is provided between the water outlet end of the step regulating valve 52 and the water inlet end of the instant heating module 1. The electric control device is electrically connected to the flow meter 53, the water outlet pump 51, and the step regulating valve 52 respectively.

[0043] The water outlet pump 51 can provide power for the water circulation or external water supply. When external boiling water needs to be provided, the step regulating valve 52 can control the water flow rate passing through the instant heating module 1, thereby improving the efficiency of water temperature increase.

[0044] When external boiling water needs to be provided, the flow meter 53 can start to work to improve the flow accuracy of the external boiling water supply.

[0045] Further, a water storage container 6 is provided at the second water outlet end 32 of the reversing valve assembly 3. The water storage container 6 has a boiling water outlet 61. A switch member 62 is provided at the boiling water outlet 61. The switch member 62 is connected to a water outlet stepping motor 63 for controlling the opening or closing of the boiling water outlet 61. The water storage container 6 can be filled with tea for brewing. After brewing is completed, the water outlet stepping motor 63 is used to open the water outlet to flow out the tea soup.

[0046] Further, a stirring motor 64 is also provided at the second water outlet end 32 of the reversing valve assembly 3. The stirring end of the stirring motor 64 extends into the inner side of the water storage container 6. The stirring motor 64 can stir the tea leaves and other soup materials in the water storage container 6 to make the soup materials more uniform and the brewing effect better.

[0047] Further, a water tank heating pipe 44 is also provided in the water storage tank 4. The electric control device is electrically connected to the water tank heating pipe 44. The water tank heating pipe 44 can play an auxiliary heating effect, enabling the water temperature to reach the preset preheating temperature more quickly.

[0048] In order to heat boiling water more efficiently, the present invention also discloses a method for heating water, including the above-mentioned preheating water dispenser. The preheating water dispenser heats water according to the following steps: Step 1: Power on the machine and preset the preheating temperature of the water storage tank 4. Detect the water level in the water storage tank 4 through the water level probe 46. When the water level in the water storage tank 4 does not reach the preset position, the water inlet solenoid valve opens until the water level rises to the preset position; when the water level in the water storage tank 4 reaches the preset position, the water inlet solenoid valve closes, and the water tank temperature control probe 45 detects the water temperature in the water storage tank 4. When the water temperature in the water storage tank 4 does not reach the preheating temperature, enter Step 2; when the water temperature in the water storage tank 4 reaches the preheating temperature, enter Step 3.

[0049] During the preheating of water and the supply of boiling water, no new water will enter the water storage tank 4 through the water inlet solenoid valve, avoiding the influence of new water on the preheating efficiency and the boiling water supply efficiency.

[0050] Step 2: The water outlet pump 51 and the instant heating module 1 start to work. The first water outlet end 31 of the reversing valve assembly 3 is conducted, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. Water flows in the circulating heating module. When the water temperature in the water storage tank 4 reaches the preheating temperature, enter Step 3.

[0051] Before the water dispenser supplies hot water outward, the water temperature in the water storage tank 4 can be relatively increased, thereby shortening the time to heat the water to boiling water.

[0052] Step 3: Set the outlet water temperature and the required water output volume required by the user and start the water outlet command. The water tank temperature control probe 45 detects the water temperature in the water storage tank 4. When the water temperature in the water storage tank 4 is lower than the preheating temperature, enter Step 4; when the water temperature in the water storage tank 4 is greater than or equal to the preheating temperature, enter Step 5.

[0053] Step 4: The first water outlet end 31 of the reversing valve assembly 3 is conducted, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. The instant heating module 1 and the water outlet pump 51 start to work. Water flows in the circulating heating module until the water tank temperature control probe 45 detects that the water temperature is greater than or equal to the preheating temperature, and then enter Step 5.

[0054] In this embodiment, the preheating temperature of the water tank is 70°C, that is, when the water temperature in the water storage tank 4 reaches 75°C, enter Step 5. Since a certain temperature drop will occur when the water flows from the water storage tank 4 to the instant heating module 1, the actual water temperature in the water storage tank 4 being 5°C higher than the preheating temperature can ensure that the water temperature does not drop below the preheating temperature when flowing to the instant heating module 1, ensuring that the instant heating module 1 can successfully complete the heating of boiling water.

[0055] Step 5: The first water outlet end 31 of the reversing valve assembly 3 is turned on, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. That is, the instant heating module 1 and the water outlet pump 51 start to work. The electronic control device controls the opening degree of the step regulating valve 52 and the power of the instant heating module 1 according to the preset water outlet temperature and water output. When the circulating water temperature control probe 11 detects that the water temperature is greater than the preset water outlet temperature, it enters Step 6.

[0056] When the preset boiling water temperature is relatively high, the water flow rate can be relatively reduced by adjusting the opening degree of the step regulating valve 52, and at the same time, the power of the instant heating module 1 can be relatively increased.

[0057] When the preset boiling water temperature is relatively low, the water flow rate can be relatively increased by adjusting the opening degree of the step regulating valve 52, and at the same time, the power of the instant heating module 1 can be relatively reduced.

[0058] Step 5 can also prevent the water with a relatively low temperature at the water outlet end of the instant heating module 1 from being directly discharged outwards before the device discharges water, making the water outlet temperature more stable.

[0059] In this embodiment, the highest water outlet temperature is 95 °C. When the highest water outlet temperature needs to be output, the water temperature flowing through the instant heating module 1 needs to reach 97 °C before entering Step 6. Since there is a certain distance between the instant heating module 1 and the second water outlet end 32, even if the boiling water with a temperature of 97 °C cools down to a certain extent when flowing towards the second water outlet end 32, it will not be lower than the highest water outlet temperature of 95 °C.

[0060] Step 6: The first water outlet end 31 of the reversing valve assembly 3 is cut off, the second water outlet end 32 of the reversing valve assembly 3 is turned on, the flow meter 53 starts to count, and after reaching the set flow rate, the water outlet pump 51 stops working, and the preheating water dispenser stops discharging water.

[0061] Further, when the water temperature detected by the water tank temperature control probe 45 in Step 3 is 5 °C lower than the preheating temperature, it enters Step 4.

[0062] When the water temperature detected by the water tank temperature control probe 45 in Step 3 and Step 4 is greater than the preheating temperature by 5 °C, it enters Step 5.

[0063] When the water temperature detected by the circulating water temperature control probe 11 in Step 5 is 2 °C higher than the preset water outlet temperature, it enters Step 6.

[0064] It can be set to a circulating heating mode in Step 2. In the circulating heating mode, Step 2 does not enter Step 3.

[0065] Second Embodiment: See Figure 5, the difference between this embodiment and the first embodiment is that the reversing valve assembly 3 of this hot water heating method includes a bypass solenoid valve 33 and a water outlet solenoid valve 34 that can be separately and independently arranged. The bypass solenoid valve 33 and the water outlet solenoid valve 34 are respectively arranged at the first water outlet end 31 and the second water outlet end 32 of the reversing valve assembly 3. By controlling the bypass solenoid valve and the water outlet solenoid valve, the first water outlet end 31 and the second water outlet end 32 can be switched between the conduction and cutoff states.

[0066] For the parts not described above, they are the same as those in the first embodiment and will not be repeated here.

[0067] Third Embodiment: See Figure 6 , Figure 7 , the difference between this embodiment and the first embodiment is that this hot water heating method includes the above-mentioned preheating water dispenser, and the preheating water dispenser heats water according to the following steps: Step 1: Power on the machine and preset the preheating temperature of the water storage tank 4. Detect the water level in the water storage tank 4 through the water level probe 46. When the water level in the water storage tank 4 has not reached the preset position, the water inlet solenoid valve is opened until the water level rises to the preset position; when the water level in the water storage tank 4 reaches the preset position, the water inlet solenoid valve is closed, and the water temperature probe 45 of the water tank detects the water temperature of the water storage tank 4. When the water temperature value detected by the water temperature probe 45 of the water tank in Step 1 is lower than the preheating temperature and the temperature difference between the two is greater than or equal to the temperature difference threshold, Step 1 enters the cold start mode. In the cold start mode, the water tank heating tube 44 starts to work, that is, the instant heating module 1 and the water outlet pump 51 remain shut down until the water temperature in the water storage tank 4 reaches the preheating temperature and enters Step 3. When the water temperature value detected by the water temperature probe 45 of the water tank in Step 1 is lower than the preheating temperature and the temperature difference between the two is less than the temperature difference threshold, Step 1 enters Step 2; Step 2: The water outlet pump 51 and the instant heating module 1 start to work. The first water outlet end 31 of the reversing valve assembly 3 is conducted, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. Water flows in the circulating heating module. When the water temperature of the water storage tank 4 reaches the preheating temperature, it enters Step 3; Step 3: Set the required outlet water temperature and the required water output of the user and start the water outlet command. The water temperature probe 45 of the water tank detects the water temperature in the water storage tank 4. When the water temperature in the water storage tank 4 is lower than the preheating temperature, it enters Step 4; when the water temperature in the water storage tank 4 is greater than or equal to the preheating temperature, it enters Step 5; Step 4: The first water outlet end 31 of the reversing valve assembly 3 is conducted, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. The instant heating module 1 and the water outlet pump 51 start to work. Water flows in the circulating heating module until the water temperature probe 45 of the water tank detects that the water temperature is greater than or equal to the preheating temperature and then enters Step 5; Step 5: The first water outlet end 31 of the reversing valve assembly 3 is turned on, and the second water outlet end 32 of the reversing valve assembly 3 is cut off. That is, the instant heating module 1 and the water outlet pump 51 start to work. The electronic control device controls the opening degree of the step regulating valve 52 and the power of the instant heating module 1 according to the preset water outlet temperature and water output. When the circulating water temperature control probe 11 detects that the water temperature is greater than the preset water outlet temperature, it enters Step 6; Step 6: The first water outlet end 31 of the reversing valve assembly 3 is cut off, and the second water outlet end 32 of the reversing valve assembly 3 is turned on. The flow meter 53 starts to count. After reaching the set flow rate, the water outlet pump 51 stops working, and the preheating water dispenser stops discharging water; The temperature difference threshold is 10°C.

[0068] For example, if the preheating temperature is set to 75°C and the actual inlet water temperature cannot reach 65°C, it will enter the cold start mode from Step 1. When starting the cold machine, such as when using the device for the first time or when injecting cold water again after a full machine cleaning, in this case, the water temperature in the water storage tank 4 generally differs greatly from the preset preheating temperature, usually more than 10°C. Without internal circulation heating, neither the instant heating module 1 nor the water outlet pump 51 needs to be started, avoiding the situation where the instant heating module 1 and the water outlet pump 51 need to be started for a long time during cold machine startup, resulting in shortened service life, and also reducing the continuous noise to a certain extent.

[0069] Further, when the water temperature detected by the water tank temperature control probe 45 in Step 3 is 5°C lower than the preheating temperature, it enters Step 4.

[0070] When the water temperature detected by the water tank temperature control probe 45 in Step 3 and Step 4 is 5°C higher than the preheating temperature, it enters Step 5.

[0071] When the water temperature detected by the circulating water temperature control probe 11 in Step 5 is 2°C higher than the preset water outlet temperature, it enters Step 6.

[0072] It can be set to the circulating heating mode in Step 2. In the circulating heating mode, Step 2 does not enter Step 3.

[0073] The rest not described is the same as the first embodiment and will not be repeated here.

[0074] The above embodiments are only the preferred solutions of the present invention, and the present invention may have other implementation solutions. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope set by the claims of this application.

Claims

1. A preheating type large-capacity water dispenser, characterized in that, It includes an electric control device and a circulating heating module. The circulating heating module includes an instant heating module and a water circulation component for circulating the water in the circulating heating module through the instant heating module (1). The circulating heating module has an external water inlet and an external water outlet. The external water inlet is connected to a water inlet valve (2) for controlling the entry of external fresh water into the circulating heating module. The external water outlet is provided with a reversing valve assembly (3). The electric control device is electrically connected to the instant heating module (1) and the reversing valve assembly (3) respectively. The electric control device guides the water flow to circulate in the circulating heating module or be discharged outward through the reversing valve assembly (3).

2. The preheating type large-capacity water dispenser according to claim 1, characterized in that: The circulating heating module further includes a water storage tank (4). The water storage tank (4) has a water tank water outlet end (41), a fresh water inlet end (42), and a circulating water inlet end (43). The external water inlet is arranged at the fresh water inlet end (42) of the water storage tank (4). The water tank water outlet end (41) of the water storage tank (4) is connected to the water inlet end of the instant heating module (1). The water outlet end of the instant heating module (1) is connected to the water inlet end of the reversing valve assembly (3). The reversing valve assembly (3) has a first water outlet end (31) and a second water outlet end (32) for supplying water outward. The first water outlet end (31) of the reversing valve assembly (3) is connected to the circulating water inlet end (43) of the water storage tank (4).

3. The preheating type large-capacity water dispenser according to claim 2, characterized in that: A water tank temperature control probe (45) and a water level probe (46) are arranged in the water storage tank (4). The water inlet valve (2) is a water inlet solenoid valve. The electric control device is electrically connected to the water inlet solenoid valve, the water tank temperature control probe (45), and the water level probe (46) respectively.

4. The preheating type large-capacity water dispenser according to claim 3, characterized in that: A circulating water temperature control probe (11) is arranged at the water outlet end and / or the outlet end of the instant heating module (1). The circulating water temperature control probe (11) is electrically connected to the electric control device.

5. The preheating type large-capacity water dispenser according to claim 4, wherein: The circulating heating module further includes a water outlet pump (51) and a step regulating valve (52). The water tank water outlet end (41) of the water storage tank (4) is connected to the water inlet end of the water outlet pump (51). The water outlet end of the water outlet pump (51) is connected to the water inlet end of the step regulating valve (52). The water outlet end of the step regulating valve (52) is connected to the water inlet end of the instant heating module (1). A flow meter (53) is arranged between the water outlet end of the step regulating valve (52) and the water inlet end of the instant heating module (1). The electric control device is electrically connected to the flow meter (53), the water outlet pump (51), and the step regulating valve (52) respectively.

6. The preheating type large-capacity water dispenser according to any one of claims 1-5, characterized in that A water tank heating pipe (44) is further arranged in the water storage tank (4). The electric control device is electrically connected to the water tank heating pipe (44).

7. A method for heating water, characterized in that, It includes the preheating water dispenser according to any one of claims 1-6. The preheating water dispenser heats water according to the following steps: Step 1: Power on the machine and preset the preheating temperature of the water storage tank (4). Detect the water level in the water storage tank (4) through the water level probe (46). When the water level in the water storage tank (4) does not reach the preset position, the inlet solenoid valve opens until the water level rises to the preset position; when the water level in the water storage tank (4) reaches the preset position, the inlet solenoid valve closes. The water tank temperature control probe (45) detects the water temperature in the water storage tank (4). When the water temperature in the water storage tank (4) does not reach the preheating temperature, enter Step 2; when the water temperature in the water storage tank (4) reaches the preheating temperature, enter Step 3; Step 2: The water outlet pump (51) and the instant heating module (1) start to work. The first water outlet end (31) of the reversing valve assembly (3) is conducted, and the second water outlet end (32) of the reversing valve assembly (3) is cut off. Water flows in the circulating heating module. When the water temperature in the water storage tank (4) reaches the preheating temperature, enter Step 3; Step 3: Set the outlet water temperature and the required water output demanded by the user and start the water outlet command. The water tank temperature control probe (45) detects the water temperature in the water storage tank (4). When the water temperature in the water storage tank (4) is lower than the preheating temperature, enter Step 4; when the water temperature in the water storage tank (4) is greater than or equal to the preheating temperature, enter Step 5; Step 4: The first water outlet end (31) of the reversing valve assembly (3) is conducted, and the second water outlet end (32) of the reversing valve assembly (3) is cut off. The instant heating module (1) and the water outlet pump (51) start to work. Water flows in the circulating heating module until the water tank temperature control probe (45) detects that the water temperature is greater than or equal to the preheating temperature and then enter Step 5; Step 5: The first water outlet end (31) of the reversing valve assembly (3) is conducted, and the second water outlet end (32) of the reversing valve assembly (3) is cut off. The instant heating module (1) and the water outlet pump (51) start to work. The electronic control device controls the opening degree of the stepping regulating valve (52) and the power of the instant heating module (1) according to the preset outlet water temperature and water output. When the circulating water temperature control probe (11) detects that the water temperature is greater than the preset outlet water temperature, enter Step 6; Step 6: The first water outlet end (31) of the reversing valve assembly (3) is cut off, the second water outlet end (32) of the reversing valve assembly (3) is conducted, and the flow meter (53) starts to count. After reaching the set flow rate, the water outlet pump (51) stops working and the preheating water dispenser stops discharging water.

8. The method for heating water according to claim 7, characterized in that: When the water temperature detected by the water tank temperature control probe (45) in Step 3 is 5°C lower than the preheating temperature, enter Step 4; When the water temperature detected by the water tank temperature control probe (45) in Step 3 and Step 4 is 5°C higher than the preheating temperature, enter Step 5; When the water temperature detected by the circulating water temperature control probe (11) in Step 5 is 2°C higher than the preset outlet water temperature, enter Step 6; It can be set to the circulating heating mode in Step 2. In the circulating heating mode, Step 2 does not enter Step 3.

9. A method for heating water, characterized in that, Including the preheating water dispenser described in Claim 6, the preheating water dispenser heats water according to the following steps; Step 1: Turn on the power and preset the preheating temperature of the water tank (4), detect the water level in the water tank (4) through the water level probe (46), when the water level in the water tank (4) does not reach the preset position, the water inlet solenoid valve is opened until the water level rises to the preset position; when the water level in the water tank (4) reaches the preset position, the water inlet solenoid valve is closed, and the water tank temperature control probe (45) detects the water temperature of the water tank (4); When the water temperature detected by the water tank temperature control probe (45) in step one is lower than the preheating temperature and the temperature difference between the two is greater than or equal to the temperature difference threshold, step one enters the cold start mode. In the cold start mode, the water tank heating pipe (44) starts to work, that is, the heating module (1) and the water outlet pump (51) remain shut down until the water temperature in the water storage tank (4) reaches the preheating temperature and enters step three; When the water temperature detected by the water tank temperature control probe (45) in step one is lower than the preheating temperature and the temperature difference between the two is less than the temperature difference threshold, step one enters step two; Step 2: The water outlet pump (51) and the instant heating module (1) start working, the first water outlet end (31) of the reversing valve assembly (3) is connected, and the second water outlet end (32) of the reversing valve assembly (3) is cut off, and water flows in the circulating heating module. When the water temperature in the water storage tank (4) reaches the preheating temperature, step 3 is entered; Step 3: Set the user's required water outlet temperature and required water outlet volume and start the water outlet command. The water tank temperature control probe (45) detects the water temperature in the water storage tank (4). When the water temperature in the water storage tank (4) is lower than the preheating temperature, proceed to step 4; when the water temperature in the water storage tank (4) is greater than or equal to the preheating temperature, proceed to step 5; Step 4: The first water outlet end (31) of the reversing valve assembly (3) is turned on, and the second water outlet end (32) of the reversing valve assembly (3) is turned off, that is, the heating module (1) and the water outlet pump (51) start to work, and water flows in the circulating heating module until the water tank temperature control probe (45) detects that the water temperature is greater than or equal to the preheating temperature, and then enters step 5; Step 5: The first water outlet end (31) of the reversing valve assembly (3) is turned on, and the second water outlet end (32) of the reversing valve assembly (3) is cut off, and the heating module (1) and the water outlet pump (51) start to work. The electronic control device controls the opening degree of the stepping regulating valve (52) and the power of the heating module (1) according to the preset water outlet temperature and water outlet volume. When the circulating water temperature control probe (11) detects that the water temperature is greater than the preset water outlet temperature, step 6 is entered; Step 6: The first water outlet end (31) of the reversing valve assembly (3) is cut off, the second water outlet end (32) of the reversing valve assembly (3) is connected, the flow meter (53) starts counting, and when the set flow rate is reached, the water outlet pump (51) stops working, and the preheating water machine stops discharging water; The temperature difference threshold is 10°C.

10. The method for heating water according to claim 9, wherein: When the water temperature detected by the water tank temperature control probe (45) in step three is 5°C lower than the preheating temperature, step four is entered; When the water temperature detected by the water tank temperature control probe (45) in steps 3 and 4 is greater than the preheating temperature by 5°C, step 5 is entered; When the circulating water temperature control probe (11) detects in step five that the water temperature is 2°C higher than the preset outlet water temperature, step six is entered; It can be set to the cycle heating mode in Step 2. In the cycle heating mode, Step 2 does not proceed to Step 3.

Images