Preheating wall-hung pipe threading machine without water tank

Abstract

A preheating wall-hung pipeline machine without a clean water tank comprises a shell, a hot tank in the shell, a heating device, a control valve, and a water inlet and a water outlet installed on the shell, the water inlet is connected with the water outlet through the control valve, characterized in that: the tank body of the hot tank is made of stainless steel material, the water inlet end of the hot tank is connected with the water inlet and the water outlet through the control valve, an exhaust port is arranged on the hot tank, the exhaust port is directly connected with the water outlet, a heating element is further arranged in the hot tank, the heating element is used for preheating the water in the hot tank, the heating device is used for secondarily heating the water flowing out of the hot tank, the water outlet end of the hot tank is connected with the water inlet end of the heating device, and the water outlet end of the heating device is connected with the water outlet. The heating element of the hot tank preheats and insulates the water in the hot tank, the heating device secondarily heats the water flowing out of the hot tank, so that the water becomes hot water, and the water flow of the hot water is improved.

Description

Technical Field

[0001] This utility model relates to the field of drinking water equipment technology, and in particular to a preheating wall-mounted water dispenser without a water purification tank. Background Technology

[0002] A water dispenser, also known as a piped water purifier, is generally used in homes, offices, schools, and other similar settings. It typically needs to be used in conjunction with a water purification system to heat drinking water. An existing water dispenser, as shown in application number CN202222275600.1 (authorization announcement number CN218164938U), includes a water tank, a heating device, and a water pump. Under the suction of the pump, cold water from the tank flows into the heating device, which heats the cold water into hot water for drinking.

[0003] The aforementioned water tank is used to store room temperature water. When the water dispenser needs hot water, it uses a heating device to heat the water before it flows out. However, due to the power limitations of current household electrical systems (household appliances cannot exceed 2200W), the hot water flow rate of the water dispenser is relatively low, affecting the user experience. Therefore, improvements have been made to address this issue. Existing water dispensers do not have a purified water tank. Instead, they have an internal hot water storage tank and a heating device, which can be located inside or outside the hot water tank. Water dispensers with the heating device inside the hot water tank can directly dispense hot water; that is, the outlet of the hot water tank is directly connected to the water outlet of the water dispenser. The heating device heats the water in the hot water tank and stores it there, allowing the hot water to flow directly from the outlet. There are also water dispensers with the heating device outside the hot water tank. The inlet of the heating device is connected to the bottom of the hot water tank via a pipeline equipped with a water pump. The outlet of the heating device is connected to the top of the hot water tank and the outlet of the water dispenser via a reversing valve. This allows the heated water to be stored in the hot water tank, or the heating device to heat the water in the tank to hot water before it flows out from the outlet. Simultaneously, the bottom of the hot water tank is also connected to the outlet via an outlet pipe (which is also connected to the inlet of the water dispenser), allowing for direct supply of warm water from the tank when needed. Using such a water dispenser, the water in the tank can be heated to hot water for storage (or hot water can be dispensed directly) when needed, thereby increasing the hot water flow rate to some extent. However, the aforementioned hot water tank still has some drawbacks:

[0004] (1) Existing hot tanks are often made of plastic, which results in poor high temperature resistance, bacterial growth, and impurities that are easy to remain in the hot tank. After long-term use, the hot tank will cause secondary pollution of the water body. Although some pipeline machines can use ultraviolet lamps to kill bacteria, the plastic hot tank will age faster under the irradiation of ultraviolet lamps. After aging, the hot tank will become brittle and crack, which will lead to safety hazards in the pipeline machine.

[0005] (2) Existing hot tanks can directly heat water to above 90°C using heating devices. When the temperature of the water in the hot tank decreases, the heating device reheats the water, causing the water in the hot tank to be repeatedly heated, which results in the problem of repeatedly boiled water.

[0006] (3) The existing hot water tank is affected by the front-end water inlet, resulting in poor stability of water flow and temperature. Furthermore, during the heating process, the water outlet of the pipeline machine is affected by thermal expansion and contraction, which may cause phenomena such as jetting or dripping, posing a safety hazard to the pipeline machine.

[0007] (4) Existing pipeline machines often only have one heating device. The heating device needs to be repeatedly circulated and heated, which greatly shortens the service life of the heating device. When the service life of the heating device reaches its limit, the pipeline machine has safety hazards.

[0008] (5) When the existing pipeline machine discharges room temperature water, the large flow of room temperature water will generate high water pressure, which will cause reverse pressure impact on the reversing valve and water pump, affecting the service life of the water pump and reversing valve.

[0009] Therefore, further improvements to the pipeline machine are needed. Summary of the Invention

[0010] The technical problem to be solved by this utility model is to provide a tankless preheating wall-mounted water dispenser that has a reasonable structure and can guarantee water quality and flow rate, in light of the above-mentioned existing technology.

[0011] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: The tankless preheating wall-mounted water dispenser includes a shell, a hot tank located inside the shell, a heating device, a control valve, and an inlet and an outlet installed on the shell. The inlet is connected to the outlet via the control valve. The hot tank is made of stainless steel. The inlet of the hot tank is connected to the inlet and outlet via the control valve. The hot tank has an exhaust port directly connected to the outlet. A heating element is also provided inside the hot tank for preheating the water inside. The heating device is used for secondary heating of the water flowing out of the hot tank. The outlet of the hot tank is connected to the inlet of the heating device, and the outlet of the heating device is connected to the outlet.

[0012] Furthermore, the heating element is a heating tube, which is located at the bottom of the hot water tank and has a flat, spiral structure. This heating tube configuration allows for heating of the water in the bottom region of the hot water tank, avoiding the existing phenomenon of water temperature stratification within the hot water tank and ensuring the stability of the temperature of the water flowing out of the hot water tank.

[0013] Furthermore, it also includes a sterilizer, which is installed inside the hot tank or between the outlet of the hot tank and the inlet of the heating device. The sterilizer is used to sterilize the water in the hot tank. If the sterilizer is installed inside the hot tank, it can be a static sterilizing lamp; if it is installed between the outlet of the hot tank and the inlet of the heating device, it can be a flow-through ultraviolet sterilizer. Of course, the hot tank of the water dispenser can also be heated to 70-90°C or higher by a heating element to kill bacteria in the hot tank through high-temperature sterilization, thus eliminating the need for a sterilizer. All of the above sterilization methods can further ensure the quality of the water dispenser's output.

[0014] Furthermore, the control valve includes a first solenoid valve located at the water inlet for controlling whether ambient temperature water flows in. The inlet end of the first solenoid valve is directly connected to the water inlet. This first solenoid valve can control whether ambient temperature water flows into the water dispenser. Ambient temperature water can flow directly into the heating tank for preheating, or it can flow directly out of the water dispenser for users to access ambient temperature water.

[0015] Furthermore, the control valve also includes a second solenoid valve for controlling whether water enters and exits the hot water tank, and a third solenoid valve for controlling whether room temperature water flows out. The inlet ends of the second and third solenoid valves are both connected to the outlet end of the first solenoid valve. The outlet end of the second solenoid valve is connected to the inlet end of the hot water tank, and the outlet end of the third solenoid valve is connected to the outlet. Based on the requirements of the control valve, it could be designed as a three-way valve. However, in this application, the control valve in the water dispenser is preferably designed as three independent solenoid valves for ease of control. Furthermore, the first, second, and third solenoid valves form a double-layer protection system in both the hot water and room temperature water pipelines to prevent leakage from the water dispenser due to the failure of any one of the solenoid valves, thus avoiding potential safety hazards and property damage.

[0016] Furthermore, the first solenoid valve is either a normally open or normally closed solenoid valve, while the second and third solenoid valves are normally closed solenoid valves. When the first solenoid valve is normally closed, the safety of all three solenoid valves is higher, preventing water leakage, and the energy-saving and environmental protection effects are better when all three solenoid valves are in a normally closed state. When the first solenoid valve is normally open, if the controller of the pipeline machine can detect abnormal water flow in the water circuit where the second and third solenoid valves are located, the first solenoid valve can be closed to protect the pipeline machine and trigger an alarm, preventing potential safety hazards to the pipeline machine.

[0017] Furthermore, a flow meter is also installed on the ambient temperature water pipeline between the third solenoid valve and the water outlet. When the water dispenser has precise requirements for the cup volume of ambient temperature water, a flow meter is installed on the ambient temperature water pipeline. The flow meter can monitor the flow rate out of the ambient temperature water pipeline (i.e., the flow rate of ambient temperature water flowing into the ambient temperature water pipeline). The ambient temperature water passing through the flow meter can flow out of the water outlet. The controller of the water dispenser can convert the flow rate data monitored by the flow meter into cup volume data and transmit it to the corresponding switch of the control system of the water dispenser to achieve the purpose of accurate water dispensing. It can also be compared with the preset flow rate to detect abnormal flow phenomena in a timely manner.

[0018] Furthermore, the heating tank is equipped with a level sensor capable of detecting low, high, and ultra-high water levels. This level sensor can be a level probe, an electronic float, or a balance tank. The heating tank has low, high, and ultra-high water level protection. The level sensor monitors the water level in the heating tank in real time, thereby controlling the amount of water entering the tank and providing water volume data to the heating device. Specifically, when the water level in the tank is low, the pipeline machine's controller can control the control valve to replenish water to the tank promptly. When the water level in the tank is high, water intake stops. When the water level in the tank is ultra-high, the pipeline machine issues an abnormal alarm. If the level sensor detects that the water level in the tank is consistently low, indicating an abnormal water intake state, the pipeline machine will not allow the heating elements and heating device to operate. In addition, the hot water tank is equipped with an ultra-high water level, which provides space for the hot water to boil. This space has the function of separating water vapor, thereby avoiding the phenomenon of steam spraying out of the outlet and water dripping from the outlet due to the hot water boiling inside the hot water tank.

[0019] Furthermore, a temperature sensor is installed inside the heating tank. The temperature sensor is used to detect the temperature of the water inside the heating tank, ensuring that the water is heated to the specified temperature and kept at the set temperature within the set range. It also provides inlet water temperature data to the water inlet of the heating device. In addition, the temperature sensor can send a signal to the controller to trigger an alarm in time when the temperature is abnormal, and provide control protection for the heating device and heating elements through the controller of the pipeline machine to avoid safety accidents such as dry burning and fire.

[0020] Furthermore, a water pump is installed between the outlet of the hot tank and the inlet of the heating device, and the water pump has a bidirectional check valve. The water pump can drive the water in the hot tank to flow into the heating device. The water pump has a self-priming function and a certain pressure boosting function, and the water pump is equipped with a bidirectional check valve to prevent the water in the heating device from flowing back into the hot tank, and also to prevent the water in the hot tank from flowing back into the heating device.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] (1) The water dispenser of this application is equipped with a heating element in the hot tank. The heating element can preheat the water in the hot tank to keep the water temperature in the hot tank at a preset temperature (e.g., 45-70°C). When the water dispenser needs to dispense hot water, the heating device located outside the hot tank can reheat the water flowing out of the hot tank to make it hot water, thereby increasing the hot water flow rate and improving the user's water experience. In addition, this application has two heating elements. The heating element and the heating device have different functions. Compared with a water dispenser with only one heating element, it can reduce the usage time of each heating element, thereby extending the service life of the heating element and the heating device, ensuring the safety of the water dispenser, and also helping to avoid the phenomenon of repeatedly boiled water.

[0023] (2) The pipeline machine of this application is provided with a control valve and a hot tank between the water inlet and the heating device. The water inlet of the heating device is not directly connected to the water inlet of the pipeline machine, thereby avoiding the feedback of unstable water pressure at the water inlet to the heating device, thus ensuring the flow rate, stability and accuracy of the water outlet of the pipeline machine, and also avoiding the impact of water pressure at the water inlet on the heating device, which would damage the heating device and extend the service life of the heating device.

[0024] (3) The hot tank of this application is made of stainless steel. Stainless steel hot tanks are not prone to bacterial growth, thus avoiding contamination of the water in the hot tank and ensuring the quality of the water output of the pipeline machine. In addition, stainless steel hot tanks have better corrosion resistance and longer service life, thereby avoiding the hidden dangers caused by plastic materials.

[0025] (4) The hot tank of this application is also provided with an exhaust port, which is directly connected to the water outlet of the pipeline machine so as to directly discharge the water vapor in the hot tank, thereby avoiding the phenomenon of jetting or dripping water at the water outlet. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the water system of Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the hot water tank in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the first structure of the heating element in Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the second structure of the heating element in Embodiment 1 of this utility model;

[0030] Figure 5 This is a cross-sectional view of the hot water tank in Embodiment 1 of this utility model;

[0031] Figure 6This is a schematic diagram of the water system in Embodiment 2 of this utility model;

[0032] Figure 7 This is a schematic diagram of the water system in Embodiment 3 of this utility model. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-5 The figure shown is Embodiment 1 of this utility model.

[0035] This embodiment of the tankless preheating wall-mounted water dispenser includes a housing (not shown in the figure), a heating tank 1 located inside the housing, a heating device 3, a control valve, and an inlet A and an outlet B installed on the housing. Inlet A is used for the dispenser to receive room temperature water, and outlet B is located on the dispenser's outlet nozzle 10 for dispensing room temperature or hot water as needed by the user. This embodiment of the water dispenser has room temperature water and hot water pipelines. The room temperature water pipeline includes an inlet A, a control valve, a flow meter 8, and an outlet B connected sequentially by pipelines. The control valve includes a first solenoid valve 5 and a third solenoid valve 7. The first solenoid valve 5 controls whether room temperature water flows into the dispenser and is located on the pipeline at inlet A. The inlet end of the first solenoid valve 5 is directly connected to inlet A. The third solenoid valve 7 controls whether room temperature water flows out and is connected to the outlet end of the first solenoid valve 5. The outlet end of the third solenoid valve 7 is connected to outlet B. In the diagram, for ease of connection, the water outlet 10 has three interfaces connected to the water outlet B: the first interface 101, the second interface 102, and the third interface 103. The outlet end of the third solenoid valve 7 is connected to the first interface 101 of the water outlet, and the flow meter 8 is installed on the ambient temperature water pipeline between the third solenoid valve 7 and the first interface 101. The flow meter 8 can monitor the flow rate of the water flowing out of the ambient temperature water pipeline. Therefore, the water dispenser in this embodiment does not require a water purification tank, and the ambient temperature water can flow out of the water outlet after passing through the first solenoid valve 5, the third solenoid valve 7, and the flow meter 8.

[0036] The hot water pipeline in this embodiment includes a control valve, a hot water tank 1, a heating device 3, and a water outlet 10 connected sequentially via pipelines. The control valve includes a second solenoid valve 6 for controlling whether water enters or exits the hot water tank 1. The inlet end of the second solenoid valve 6 is connected to the outlet end of the first solenoid valve 5, and the outlet end of the second solenoid valve 6 is connected to the inlet end of the hot water tank 1. The hot water tank 1 is used to store preheated water. The tank body of the hot water tank 1 is made of stainless steel. The hot water tank 1 is provided with an exhaust port 11, which is connected to the third interface 103 of the water outlet 10, that is, directly connected to the water outlet B through the third interface 103. With the help of the exhaust port 11, water vapor in the hot water tank 1 can be discharged from the exhaust port B, ensuring the safe use of the pipeline machine. The hot water tank 1 in this embodiment is also provided with a heating element 2, which is used to preheat the water in the hot water tank 1. The heating element 2 is a heating tube, which is located at the bottom of the hot water tank 1. The heating tube has a flat spiral structure and has at least two structures, such as... Figure 3 and Figure 4 As shown, both ends of the heating tube are sealed to the bottom of the hot tank 1. In addition, the hot tank 1 in this embodiment is equipped with a liquid level sensor 12 and a temperature sensor 13. The liquid level sensor 12 is used to detect whether the liquid level in the hot tank 1 is at a low water level, a high water level, or an ultra-high water level, respectively. The temperature sensor 13 is used to detect the temperature of the water in the hot tank to ensure that the water in the hot tank 1 is at a suitable temperature. The liquid level sensor 12 is a water level probe. Furthermore, the first solenoid valve 5, which controls the system, is either a normally open or normally closed solenoid valve, while the second solenoid valve 6 and the third solenoid valve 7 are normally closed solenoid valves. The first solenoid valve 5, along with the second solenoid valve 6 and the third solenoid valve 7, form a double-layer protection system in both the hot water and ambient temperature water pipes. This prevents leakage from the water dispenser due to the failure of any one of the solenoid valves. When the first solenoid valve 5 is normally closed, the safety of all three solenoid valves is enhanced, preventing water leakage. With all three solenoid valves in the normally closed state, the energy-saving and environmental protection effects are also improved. When the first solenoid valve 5 is normally open, if the system detects an abnormal water flow in the water pipes where the second solenoid valve 6 and the third solenoid valve 7 are located, the first solenoid valve 5 can close to protect the water dispenser and trigger an alarm, preventing potential safety hazards to the water dispenser.

[0037] In this embodiment, the heating device 3 is used for secondary heating of the water flowing out of the hot tank 1. The heating device 3 is installed outside the hot tank 1. The water outlet of the hot tank 1 is connected to the water inlet of the heating device 3. The water outlet of the heating device 3 is connected to the second interface 102 of the water outlet 10, and is connected to the water outlet B through the second interface 102. Since the water outlet 10 has three interfaces connected to different water circuits, namely, the first interface 101 is connected to the water outlet of the third solenoid valve 7, and the second interface 102 is connected to the water outlet of the heating device 3, the water pressure at the water inlet A in this embodiment will not be fed back to the heating device 3. The water pressure at the water inlet A is discharged directly from the water outlet 10 through the first interface 101, thereby avoiding damage to the heating device 3 by pressure and ensuring the service life of the heating device 3. Furthermore, in this embodiment, a sterilizer 4 is provided between the water outlet of the hot tank 1 and the water inlet of the heating device 3. The sterilizer 4 is used to sterilize the water flowing out of the hot tank 1. The sterilizer 4 is a flow-through ultraviolet sterilizer, which can further ensure the water quality of the water dispenser. In addition, a water pump 9 is provided between the water outlet of the hot tank 1 and the water inlet of the heating device 3 in this embodiment. The water pump 9 is located after the sterilizer 4. The water pump 9 can drive the water in the hot tank 1 to flow into the heating device 3. The water pump 9 is equipped with a bidirectional check valve to prevent the water in the heating device 3 from flowing back into the hot tank 1, and also to prevent the water in the hot tank 1 from flowing back into the heating device 3.

[0038] The workflow of this embodiment is as follows:

[0039] A. First, when the water level in the hot tank 1 reaches the low water level, the control system of the pipeline machine controls the first solenoid valve 5 and the second solenoid valve 6 to open. The first solenoid valve 5 controls the inlet A of the pipeline machine to flow in room temperature water, and the second solenoid valve 6 controls the room temperature water to flow into the hot tank 1, so that the liquid level in the hot tank 1 reaches the high water level. The first solenoid valve 5 and the second solenoid valve 6 are in the closed state, and the water in the hot tank 1 is preheated by the heating element 2, so that the water in the hot tank 1 reaches 45-70°C and is stored in the hot tank 1.

[0040] B. When the user needs hot water, the control system controls the two solenoid valves 6 and the water pump 9 to start, so that the water in the hot tank 1 flows into the heating device 3 after passing through the sterilizer 4. The heating device 3 heats the water a second time, so that the water becomes hot water at the required temperature and flows out from the outlet B of the water dispenser.

[0041] C. When the user needs room temperature water to flow out, the control system controls the first solenoid valve 5 and the third solenoid valve 7 to open. The first solenoid valve 5 controls the inlet A of the pipeline machine to let room temperature water in, and the third solenoid valve 7 controls the room temperature water to flow out. The room temperature water flows out from the outlet B after passing through the flow meter 8.

[0042] like Figure 6 As shown, this is Embodiment 2 of the present invention.

[0043] This embodiment is basically the same as embodiment 1, except that the liquid level sensor 12 in this embodiment is an electronic float.

[0044] like Figure 7 As shown, this is Embodiment 3 of the present invention.

[0045] This embodiment is basically the same as embodiment 1, except that: the liquid level sensor 12 in this embodiment is a balance water tank.

Claims

1. A tankless preheating wall-mounted water dispenser, comprising a housing, a heating tank (1) located within the housing, a heating device (3), a control valve, and an inlet and an outlet installed on the housing, wherein the inlet is connected to the outlet via the control valve, characterized in that: The tank body of the hot tank (1) is made of stainless steel. The water inlet of the hot tank (1) is connected to the water inlet and water outlet via a control valve. The hot tank (1) is provided with an exhaust port (11), which is directly connected to the water outlet. The hot tank (1) is also provided with a heating element (2), which is used to preheat the water in the hot tank (1). The heating device (3) is used to reheat the water flowing out of the hot tank (1). The water outlet of the hot tank (1) is connected to the water inlet of the heating device (3), and the water outlet of the heating device (3) is connected to the water outlet.

2. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: The heating element (2) is a heating tube, which is located at the bottom of the hot tank (1) and has a flat spiral structure.

3. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: It also includes a sterilizer (4), which is installed inside the hot tank (1) or between the water outlet of the hot tank (1) and the water inlet of the heating device (3). The sterilizer (4) is used to sterilize the water in the hot tank (1).

4. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: The control valve includes a first solenoid valve (5) installed at the inlet for controlling whether room temperature water flows in, and the inlet end of the first solenoid valve (5) is directly connected to the inlet.

5. The tankless preheating wall-mounted water dispenser according to claim 4, characterized in that: The control valve further includes a second solenoid valve (6) for controlling whether water enters or exits the hot tank (1) and a third solenoid valve (7) for controlling whether room temperature water flows out. The inlet end of the second solenoid valve (6) and the inlet end of the third solenoid valve (7) are both connected to the outlet end of the first solenoid valve (5). The outlet end of the second solenoid valve (6) is connected to the inlet end of the hot tank (1), and the outlet end of the third solenoid valve (7) is connected to the outlet.

6. The tankless preheating wall-mounted water dispenser according to claim 5, characterized in that: The first solenoid valve (5) is a normally open solenoid valve or a normally closed solenoid valve, and the second solenoid valve (6) and the third solenoid valve (7) are normally closed solenoid valves.

7. The tankless preheating wall-mounted water dispenser according to claim 5, characterized in that: A flow meter (8) is also installed on the normal temperature water pipe between the third solenoid valve (7) and the water outlet.

8. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: The hot tank (1) is equipped with a liquid level sensor (12) that can detect whether the liquid level in the hot tank (1) is at a low water level, a high water level and an ultra-high water level. The liquid level sensor (12) is a water level probe, an electronic float or a balance tank.

9. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: The hot tank (1) is equipped with a temperature sensor (13).

10. The tankless preheating wall-mounted water dispenser according to claim 1, characterized in that: A water pump (9) is provided between the water outlet of the hot tank (1) and the water inlet of the heating device (3), and the water pump (9) has a bidirectional check valve.

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