Water drinking equipment capable of realizing stepless temperature regulation and stable flow

Abstract

The utility model discloses drinking water equipment capable of realizing stepless temperature regulation and stable flow, which comprises a shell, a water inlet pipeline connected to an external water source and a water outlet pipeline connected to a water outlet are arranged in the shell; the instant heater is communicated between the water inlet pipeline and the water outlet pipeline so as to provide water at a specified temperature; the heat preservation tank is communicated between the water inlet pipeline and the water outlet pipeline; the heat preservation tank and the instant heater form a circulation loop so that hot water within the preset temperature range can be provided for the instant heater. According to the water dispenser, stepless regulation and control of the water outlet temperature of the water dispenser can be achieved, meanwhile, the flow of hot water is consistent, and the water cut-off phenomenon does not occur.

Description

Technical Field

[0001] The utility model relates to the field of drinking water equipment, and more specifically, to a drinking water equipment capable of stepless temperature regulation and stable flow rate. Background Art

[0002] With the improvement of drinking water quality, various drinking water equipment has also emerged. Although there are many types of drinking water equipment on the market, there are still some common defects: First, the water outlet temperatures of existing commercial drinking water equipment are basically fixed, generally a combination of the following: hot water, warm water mixed with hot water and room temperature water, filtered room temperature water and cold water, which cannot achieve precise control of the water outlet temperature of the drinking water equipment; second, the water output of existing instant hot water dispensers is greatly affected by the water outlet temperature. The higher the water outlet temperature, the lower the water outlet flow rate, and even water outages may occur. Therefore, many commercial drinking water equipment will be set with multiple gears; third, the control unit and / or operating surface of existing commercial drinking water equipment are integrated with the drinking water equipment or set on the counter, which is not suitable for some concealed installation scenarios.

[0003] For example, in the invention patent with announcement number CN109757988B and name of water dispenser, the water dispenser disclosed therein includes a body, a cold tank, a water source tank, a cold water outlet pipe, a heating tank, a hot water outlet pipe and a steam generating assembly, wherein a refrigeration cavity is defined in the cold tank, one end of the cold water outlet pipe is connected to the cold tank, the other end of the cold water outlet pipe forms a cold water outlet and is provided with a cold water faucet for flowing out cold water; the heating tank is connected to the cold tank and a heating cavity for heating is defined in the heating tank, one end of the hot water outlet pipe is connected to the heating tank, the other end of the hot water outlet pipe forms a hot water outlet and is provided with a hot water faucet for flowing out hot water. Although the above disclosed technical solution sterilizes and cleans the water dispenser by setting a steam generating assembly, its outlet water temperature is fixed to hot water and cold water, and accurate control of the outlet water temperature cannot be achieved.

[0004] For another example, in the invention patent with publication number CN113854827A and name "Water Dispenser", the disclosed water dispenser includes a heating module and a water outlet pipe. The heating module is used to heat the water in the water outlet pipe in a small flow and high temperature water outlet mode, and the water outlet tank outputs normal temperature water or low temperature water in a large flow and low temperature water outlet mode. The water outlet temperature of the water dispenser provided by the above technical solution is fixed to high temperature water, normal temperature water or low temperature water, and the water outlet temperature cannot be infinitely controlled. The water output is greatly affected by the water outlet temperature. The water dispenser has a small flow and high temperature water outlet mode and a large flow and low temperature water outlet mode. Utility Model Content

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0006] Another object of the utility model is to provide a drinking water device with stepless temperature adjustment and stable flow rate, which can realize stepless regulation of the water outlet temperature of the water dispenser and make the water outlet flow rate consistent without water shortage.

[0007] In order to achieve these purposes and other advantages according to the utility model, a drinking water device with stepless temperature adjustment and stable flow rate is provided, comprising:

[0008] A housing, in which a water inlet pipe connected to an external water source and a water outlet pipe connected to a water outlet are arranged;

[0009] an instant heater connected between the water inlet pipe and the water outlet pipe to provide water at a specified temperature;

[0010] A heat preservation tank connected between the water inlet pipeline and the water outlet pipeline;

[0011] The heat preservation tank and the instant heater form a circulation loop to provide hot water within a preset temperature range to the instant heater.

[0012] Preferably, a reversing valve is provided on the water outlet pipeline so that the water outlet of the instant heater flows to the water outlet or to the heat preservation tank.

[0013] Preferably, a negative pressure valve is provided on the water inlet pipeline between the heat preservation tank and the instant heating heater, and a water pump is provided on the water inlet pipeline between the negative pressure valve and the instant heating heater.

[0014] Preferably, the water inlet pipeline between the negative pressure valve and the instant thermal heater is divided into a first water inlet pipeline and a second water inlet pipeline in parallel, and the first water inlet pipeline and the second water inlet pipeline are both connected to the water inlet pipe of the instant thermal heater; the first water inlet pipeline and the second water inlet pipeline are respectively provided with a first water pump and a second water pump.

[0015] Preferably, the preset temperature range is 65-70°C.

[0016] Preferably, the end of the water inlet pipe of the instant heater is connected to the first stale water outlet pipe, on which the first stale water outlet pipe is provided with a first direct-acting valve, and the water inlet pipe between the insulation tank and the negative pressure valve is provided with a second stale water outlet pipe, on which the second stale water outlet pipe is provided with a second direct-acting valve.

[0017] Preferably, a water inlet solenoid valve is provided on the water inlet pipeline near the external water source, an exhaust hole is provided on the top of the insulation tank, and a third direct-acting valve is provided on the water outlet pipe of the insulation tank.

[0018] Preferably, a liquid level switch is provided in the insulation tank, the liquid level switch is a double float liquid level switch, and a first temperature sensor is provided at the water outlet of the insulation tank; a second temperature sensor and a third temperature sensor are provided at the water inlet and outlet of the instant heater, respectively.

[0019] Preferably, the volume of the insulation tank is greater than 2L.

[0020] Preferably, the drinking water equipment with stepless temperature adjustment and stable flow rate also includes a control panel connected to the operating end, the control panel is connected to an external power supply, the reversing valve, the water inlet solenoid valve, the first direct-acting valve, the second direct-acting valve, the third direct-acting valve, the first water pump and the second water pump are all electrically connected to the control panel, and the first temperature sensor, the second temperature sensor and the third temperature sensor are all communicatively connected to the control panel.

[0021] The utility model includes at least the following beneficial effects: the drinking water equipment with stepless temperature adjustment and stable flow provided by the utility model comprises an instantaneous heater and an insulation tank, wherein the insulation tank is used to store high-temperature water at 65-70°C, and is used as a supplementary water source for the instantaneous heater when the outlet water temperature is higher than 70°C; the instantaneous heater is preferably a rare earth thick film heater, and the instantaneous heater is used to heat the water pumped into the instantaneous heater to a specified temperature and flow out of the instantaneous heater, thereby realizing stepless regulation of the outlet water temperature of the drinking water equipment; the combination of the instantaneous heater and the insulation tank breaks through the problem of reduced or even cut-off flow of low-temperature water inlet and high-temperature water outlet under the constraint of energy conservation, so that the flow rate of hot water output from the drinking water equipment is consistent, thereby improving the user's experience of hot water output.

[0022] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the water path of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in a technical solution of the utility model;

[0024] Figure 2 This is a system block diagram of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0025] Figure 3 It is a logic block diagram of mode 1 of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0026] Figure 4It is a logic block diagram of mode 2 of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0027] Figure 5 It is a logic block diagram of mode 3 of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0028] Figure 6 It is a logic block diagram of mode 4 of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0029] Figure 7 It is a logic block diagram of mode 5 of a drinking water device capable of stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model;

[0030] Figure 8 This is a logic block diagram of mode six of a drinking water device with stepless temperature adjustment and stable flow rate as described in another technical solution of the utility model. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0032] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0033] like Figure 1 , 2 As shown, the utility model provides a drinking water device with stepless temperature adjustment and stable flow rate, comprising:

[0034] A housing, in which a water inlet pipe 1 connected to an external water source and a water outlet pipe 2 connected to a water outlet are arranged;

[0035] An instant heater 3, which is connected between the water inlet pipe 1 and the water outlet pipe 2 to provide water at a specified temperature;

[0036] A heat preservation tank 4, which is connected between the water inlet pipe 1 and the water outlet pipe 2;

[0037] The heat preservation tank 4 and the instant heater 2 form a circulation loop to provide hot water within a preset temperature range to the instant heater 2 .

[0038] In the above technical solution, the drinking water equipment with stepless temperature adjustment and stable flow rate includes a shell, an instant heater 3 and a thermal insulation tank 4. A water inlet pipe 1 connected to an external water source and a water outlet pipe 2 connected to a water outlet are provided in the shell. Preferably, a filtering structure is provided at the connection between the water inlet pipe 1 and the external water source. One implementation of the filtering structure is to provide a filter at the connection between the water inlet pipe 1 and the external water source. The external water source can be a dynamic water source, such as a faucet, or a static water source, such as a water tank. Preferably, the water outlet pipe 2 can be diverted to multiple water outlets. It should be noted that the more water outlets there are, the greater the demand for hot water when all water outlets are outlet, and the corresponding volume of the thermal insulation tank should be larger.

[0039] In the above technical scheme, the tank body of the insulation tank 4 adopts a stainless steel shell, and the outside of the stainless steel shell is coated with an insulation layer to ensure the insulation effect of the insulation tank 4. One implementation form of the insulation layer is a cloth layer. The top of the insulation tank 4 is provided with an exhaust hole and a water inlet, and the bottom of the insulation tank 4 is provided with a water outlet and a first temperature sensor 17. The insulation tank 4 is used to store high-temperature water of 65-70°C. The capacity of the insulation tank 4 is determined by the user's habitual amount of high-temperature water taken at a time. Generally speaking, the larger the user's habitual amount of high-temperature water taken at a time, the larger the capacity of the insulation tank 4. Conversely, the smaller the user's habitual amount of high-temperature water taken at a time, the smaller the capacity of the insulation tank 4. In the above technical scheme, as long as the volume of the insulation tank 4 is reasonably set and sufficient for a single hot water intake, it can ensure that the user does not stop water during a single high-temperature water intake.

[0040] In the above technical scheme, a preferred structure of the instant thermal heater 3 is a rare earth thick film heater. The instant thermal heater 3 is used to heat the water entering the instant thermal heater to a specified temperature and then flow out of the instant thermal heater 3. The instant thermal heater 3 has a water outlet at the top and a water inlet pipe 6 at the bottom. The water outlet of the instant thermal heater 3 is connected to the water inlet of the insulation tank 4, and the water inlet pipe 6 of the instant thermal heater 3 is connected to the water outlet of the insulation tank 4, that is, the insulation tank 4 and the instant thermal heater 2 form a circulation loop to provide hot water within a preset temperature range to the instant thermal heater 2, and the preset temperature range is preferably 65 to 70°C.

[0041] In the above technical scheme, the drinking water equipment with infinitely adjustable temperature and stable flow rate includes an instantaneous heater and an insulation tank, wherein the insulation tank is used to store high-temperature water at 65-70°C, and is used as a supplementary water source for the instantaneous heater when the outlet water temperature is higher than 70°C; the instantaneous heater is preferably a rare earth thick film heater, and the instantaneous heater is used to heat the water pumped into the instantaneous heater to a specified temperature and flow out of the instantaneous heater, thereby realizing infinite regulation of the outlet water temperature of the drinking water equipment; the combination of the instantaneous heater and the insulation tank breaks through the problem of reduced or even cut-off flow of low-temperature water inlet and high-temperature water outlet under the constraint of energy conservation, so that the flow rate of hot water output from the drinking water equipment is consistent, thereby improving the user's experience of hot water output.

[0042] In one of the technical solutions, a reversing valve 20 is provided on the water outlet pipe 2 so that the water outlet of the instant heater 3 flows to the water outlet or to the insulation tank 4. When the reversing valve 20 turns to the water outlet direction of the drinking water equipment, it is used to provide water with a specified temperature and a specified flow rate. When the reversing valve 20 turns to the insulation tank 4 direction, it is used to supplement the insulation tank 4 with hot water of a preset temperature.

[0043] In one of the technical solutions, a negative pressure valve 13 is provided on the water inlet pipe 1 between the insulation tank 4 and the instant thermal heater 3, and a water pump is provided on the water inlet pipe between the negative pressure valve 13 and the instant thermal heater 3 for controlling the water output of the instant thermal heater 3.

[0044] In one of the technical solutions, the water inlet pipeline between the negative pressure valve 13 and the instant thermal heater 3 is divided into a first water inlet pipeline 7 and a second water inlet pipeline 9 in parallel, and the first water inlet pipeline 7 and the second water inlet pipeline 9 are both connected to the water inlet pipe 6 of the instant thermal heater 3; the first water inlet pipeline 7 and the second water inlet pipeline 9 are respectively provided with a first water pump 8 and a second water pump 10. Two water inlet pipelines are arranged in front of the instant thermal heater 3, which can realize precise control of the water intake volume and improve the stability of the water supply of the drinking water equipment shown. The first water inlet pipeline 7 and the second water inlet pipeline 9 are arranged in parallel. When one water inlet pipeline fails, the other water pumping pipeline can still work.

[0045] In one of the technical solutions, the preset temperature range is 65-70° C., which is used to provide hot water of a certain temperature to the instant heater 3 for further heating.

[0046] In one of the technical solutions, the end of the water inlet pipe 6 of the instant heater 3 is connected to the first stale water outlet pipe 11, on which the first stale water outlet pipe 11 is provided with a first direct-acting valve 12, and the water inlet pipe between the insulation tank 4 and the negative pressure valve 13 is provided with a second stale water outlet pipe 14, on which the second stale water outlet pipe 14 is provided with a second direct-acting valve 15. The first stale water outlet pipe 11 and the second stale water outlet pipe 14 are used to quickly discharge stale water in the drinking water equipment to prevent repeated heating of drinking water.

[0047] In one of the technical solutions, a water inlet solenoid valve 16 is provided near the external water source in the water inlet pipe 1, an exhaust hole is provided at the top of the insulation tank 4, and a third direct-acting valve 18 is provided on the water outlet pipe of the insulation tank 4. The water inlet solenoid valve 16 is used to open or close the water inlet management, and the third direct-acting valve 18 is used to control the water outlet of the insulation tank.

[0048] In one of the technical solutions, a liquid level switch 5 is provided in the insulation tank 4, and the liquid level switch is a double-float liquid level switch. A first temperature sensor 17 is provided at the water outlet of the insulation tank 4; a second temperature sensor 21 and a third temperature sensor 19 are respectively provided at the water inlet and the water outlet of the instant heater 3. The double-float liquid level switch detects the liquid level in the insulation tank 4, and the double floats are arranged up and down. The upper float feeds back a high liquid level signal, and the lower float feeds back a low liquid level signal.

[0049] In one of the technical solutions, the volume of the insulation tank 4 is greater than 2L. The preferred volume of the insulation tank 4 is 2L, which is set based on the amount of water that most people usually take at one time. In different scenarios, the volume of the insulation tank 4 can be set larger or smaller.

[0050] In one of the technical solutions, the drinking water equipment with stepless temperature adjustment and stable flow rate also includes a control panel connected to the operating end, the control panel is connected to an external power supply, the reversing valve 20, the water inlet solenoid valve 16, the first direct-acting valve 12, the second direct-acting valve 15, the third direct-acting valve 18, the first water pump 8 and the second water pump 10 are all electrically connected to the control panel, and the first temperature sensor 17, the second temperature sensor 21 and the third temperature sensor 19 are all communicatively connected to the control panel.

[0051] In the above technical solution, the control panel is further connected to the operation end, which may be an operation screen, which is arranged on the drinking water device with stepless temperature adjustment and stable flow rate; the operation end may also be a mobile operation end, such as a mobile phone terminal, etc. The control panel controls the following execution components to execute relevant instructions according to the user instructions input by the operation end: the reversing valve, the water inlet solenoid valve, the first direct-acting valve, the second direct-acting valve, the third direct-acting valve, the first water pump and the second water pump; the control panel is also used to receive monitoring data of the following monitoring components: the first temperature sensor, the second temperature sensor and the third temperature sensor.

[0052] As a drinking water device capable of steplessly adjusting temperature and flow rate provided by the utility model, it has six control modes, namely:

[0053] 1. If Figure 3 As shown, mode 1 is a mode for discharging water at 40-70°C, which executes the following instructions through the control panel: first, open the water inlet solenoid valve 16 to open the external water inlet pipeline, then turn on the first water pump 8 and the second water pump 10 to pump pure water into the instant heater 3, and after heating the water to the specified temperature, control the water flow to be discharged according to the specified water output;

[0054] 2. If Figure 4 As shown, mode 2 is a mode for shutting off the 40-70°C water, which executes the following instructions through the control panel: first shut down the instant heater 3 to stop heating and releasing the pure water, then shut down the water inlet solenoid valve 16 to shut down the external water inlet pipeline to stop delivering the pure water, then shut down the first pump 8 and the second pump 10 to stop the suction action, at this time, there will be residual stale water in the pipeline, then open the first direct-acting valve 12 and the second direct-acting valve 15 to quickly drain the stale water, and finally close the first direct-acting valve 12 and the second direct-acting valve 15 to prevent the pure water from flowing away unintentionally when the water is discharged next time;

[0055] 3. If Figure 5As shown, mode three is a mode for discharging 70-100°C water, which executes the following instructions through the control panel: first check the low liquid level disconnection and closure status of the liquid level switch in the insulation tank 4, and discharge water in two situations according to the different opening and closing conditions of the liquid level switch. The first situation is that the low liquid level of the liquid level switch is closed, that is, when there is still water in the insulation tank 4, first open the third direct-acting valve 18, and start to transport the 70°C water in the insulation tank 4 as the water source, then open the first water pump 8 and the second water pump 10 to draw pure water in, and finally the instant heater heats the water to the specified temperature, and then controls the water flow to be released according to the specified water output, until there is no water in the insulation tank 4, close the third direct-acting valve 18, stop pumping water from the insulation tank 4, open the water inlet solenoid valve 16, open the external water inlet pipeline, and continue to transport water as a water source. The second situation is that the low liquid level of the liquid level switch is disconnected, that is, there is no water in the insulation tank 4. At this time, first open the water inlet solenoid valve 16 to open the external water inlet pipeline and continue to transport water as a water source; then turn on the first water pump 8 and the second water pump 10 to draw pure water in, and finally start the instant heater to heat the water to the specified temperature, and then control the water flow to be released according to the specified water output.

[0056] 4. If Figure 6 As shown, mode 4 is a mode for shutting off 70-100°C water, which executes the following instructions through the control panel: first shut down the instantaneous heater to stop heating and releasing pure water, then shut down the water inlet solenoid valve 16 and the third direct-acting valve 18, shut down all pipelines to stop delivering water, then shut down the first pumping pump 8 and the second pumping pump 10 to stop the suction action, and there will be residual stale water in the pipeline, then open the first direct-acting valve 12 and the second direct-acting valve 15 to quickly drain the stale water (3 seconds), and finally close the first direct-acting valve 12 and the second direct-acting valve 15 to prevent the pure water from flowing away unintentionally when discharging water next time;

[0057] 5. If Figure 7As shown, mode five is the insulation tank water replenishment mode, which executes the following instructions through the control panel: the trigger time of the insulation tank water replenishment mode is when the stepless temperature control and stable flow drinking water equipment is in sleep mode and does not produce water, check the low liquid level disconnection and closure of the liquid level switch in the insulation tank 4. If the low liquid level signal feedback of the liquid level switch is disconnected, it is judged that the insulation tank 4 is short of water and it is necessary to start replenishing water. First, open the reversing valve 20 to change the water outlet channel of the instant heater from leading to the water outlet to leading to the insulation tank 4, then open the water inlet solenoid valve 16 to open the external water inlet pipeline, and then turn on the first water pump 8 and the second water pump 10 to Pure water is sucked in, and the instant heater 3 is finally started. After the water is heated to 70°C, an unlimited amount of water is released until the low liquid level signal of the liquid level switch is fed back as closed. The instant heater 3 is first turned off to stop heating and releasing the pure water, and then the water inlet solenoid valve 16 is closed to close the water inlet pipeline and stop delivering pure water. The first pumping pump 8 and the second pumping pump 10 are then turned off to stop the pumping action. There will be residual stale water in the pipeline. Then the first direct-acting valve 12 and the second direct-acting valve 15 are opened to quickly drain the stale water (3 seconds), and finally the first direct-acting valve 12 and the second direct-acting valve 15 are closed to prevent the pure water from flowing away for no reason when the water is discharged next time.

[0058] 6. If Figure 8 As shown, mode six is ​​the insulation tank heating mode, which executes the following instructions through the control panel: the trigger time of the insulation tank heating mode is when the stepless temperature control and stable flow drinking water device is in sleep mode and does not produce water and the water volume in the insulation tank 4 is sufficient (that is, the high liquid level feedback signal of the liquid level switch is closed), check the temperature detected by the first temperature sensor 17, if the detected temperature is less than 65°C, it means that the temperature of the insulation tank is insufficient and heating needs to be started, first open the reversing valve 20, change the water outlet channel of the instant heater from leading to the water outlet to leading to the insulation tank 4, then open the third direct-acting valve 18, and start to transport the water below 65°C in the insulation tank 4 as the water source, and then open the first The water pump 8 and the second water pump 10 draw pure water in, and finally start the instant heater. After heating the water to 70°C, release the water into the insulation tank 4 without limit until the temperature detected by the first temperature sensor 17 is greater than 70°C. First, turn off the instant heater to stop heating and releasing the pure water, then close the third direct-acting valve 18 to close the water channel and stop the delivery. Finally, turn off the first water pump 8 and the second water pump 10 to stop the suction action. There will be residual stale water in the pipeline. Then open the first direct-acting valve 12 and the second direct-acting valve 15 to quickly drain the stale water (3 seconds), and finally close the first direct-acting valve 12 and the second direct-acting valve 15 to prevent the pure water from flowing away for no reason when the water is discharged next time.

[0059] As described above, according to the present invention, the present invention at least includes the following beneficial effects:

[0060] First, the drinking water device with stepless temperature adjustment and stable flow provided by the utility model adopts a combination of a heat preservation tank and an instant heater, which breaks through the problem of reduced or even water cut-off flow of low-temperature water inlet and high-temperature water outlet under the restriction of energy conservation, so that the drinking water device can maintain a consistent flow of hot water under any water inlet temperature, thereby improving the user's experience of hot water outlet;

[0061] Secondly, the drinking water device with stepless temperature adjustment and stable flow provided by the utility model has a control panel connected to the operation end for receiving various monitoring data and executing according to the user instructions input by the operation end. The control panel and the housing of the drinking water device can be integrally arranged or separately arranged, that is, the control panel can be installed at any position, and the drinking water device with stepless temperature adjustment and stable flow can even be installed under the kitchen or in a concealed position, which broadens the installation scene of the drinking water device;

[0062] Thirdly, the utility model provides a drinking water device with stepless temperature adjustment and stable flow rate, which adopts an instant heating heater, which is used to heat the water drawn into the instant heating heater to a specified temperature and flows out of the instant heating heater, thereby realizing stepless regulation of the outlet water temperature of the drinking water device;

[0063] Fourthly, the utility model provides a drinking water device with stepless temperature adjustment and stable flow rate, which stores high-temperature water of 65-70°C by setting a heat preservation tank, and is used as a supplementary water source for the instant heater when the outlet water temperature is higher than 70°C, thereby improving the outlet efficiency of high-temperature hot water;

[0064] Fifth, the utility model provides a drinking water device with stepless temperature adjustment and stable flow rate. By providing a heat preservation tank to supplement high-temperature water and two water pumping pipelines, the water intake can be accurately controlled, and the stability of water supply of the drinking water device is also improved;

[0065] Sixth, the utility model provides a drinking water device with stepless temperature adjustment and stable flow, which is provided with two stale water outlet pipes, thereby ensuring timely discharge of stale water in the drinking water device and preventing drinking of thousands of boiling water (drinking water that has been heated repeatedly).

[0066] The number of devices and processing scales described here are used to simplify the description of the utility model. The application, modification and variation of the utility model of the drinking water device with stepless temperature adjustment and stable flow rate are obvious to those skilled in the art.

[0067] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Drinking water equipment with stepless temperature adjustment and stable flow rate, characterized by: include: A housing, in which a water inlet pipe connected to an external water source and a water outlet pipe connected to a water outlet are arranged; an instant heater connected between the water inlet pipe and the water outlet pipe to provide water at a specified temperature; A heat preservation tank connected between the water inlet pipeline and the water outlet pipeline; The heat preservation tank and the instant heater form a circulation loop to provide hot water within a preset temperature range to the instant heater.

2. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 1, characterized in that: A reversing valve is arranged on the water outlet pipeline so that the water outlet of the instant heater flows to the water outlet or to the heat preservation tank.

3. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 2, characterized in that: A negative pressure valve is provided on the water inlet pipeline between the heat preservation tank and the instant heating heater, and a water pump is provided on the water inlet pipeline between the negative pressure valve and the instant heating heater.

4. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 3, characterized in that: The water inlet pipeline between the negative pressure valve and the instantaneous heater is divided into a first water inlet pipeline and a second water inlet pipeline connected in parallel, and the first water inlet pipeline and the second water inlet pipeline are both connected to the water inlet pipe of the instantaneous heater; the first water inlet pipeline and the second water inlet pipeline are respectively provided with a first water pump and a second water pump.

5. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 4, characterized in that: The preset temperature range is 65-70°C.

6. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 5, characterized in that: The end of the water inlet pipe of the instant heater is connected to the first stale water outlet pipe, on which a first direct-acting valve is provided. The water inlet pipe between the insulation tank and the negative pressure valve is provided with a second stale water outlet pipe, on which a second direct-acting valve is provided.

7. The drinking water equipment with stepless temperature adjustment and stable flow rate as claimed in claim 6, characterized in that: The water inlet pipeline is provided with a water inlet solenoid valve near the external water source, the top of the insulation tank is provided with an exhaust hole, and the water outlet pipe of the insulation tank is provided with a third direct-acting valve.

8. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 7, characterized in that: A liquid level switch is arranged in the insulation tank, and the liquid level switch is a double-float liquid level switch. A first temperature sensor is arranged at the water outlet of the insulation tank; a second temperature sensor and a third temperature sensor are arranged at the water inlet and the water outlet of the instant heater, respectively.

9. The drinking water equipment with stepless temperature regulation and stable flow rate as claimed in claim 8, characterized in that: The volume of the insulation tank is greater than 2L.

10. The drinking water equipment with stepless temperature adjustment and stable flow rate as claimed in claim 9, characterized in that: It also includes a control board connected to the operating end, the control board is connected to an external power supply, the reversing valve, the water inlet solenoid valve, the first direct-acting valve, the second direct-acting valve, the third direct-acting valve, the first water pump and the second water pump are all electrically connected to the control board, and the first temperature sensor, the second temperature sensor and the third temperature sensor are all communicatively connected to the control board.

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