Anti-overflow waterway heating system and towel machine

Abstract

The utility model discloses an anti-overflow waterway heating system and a towel machine, belongs to the technical field of towel machines, and aims to overcome the defect that an existing towel machine is easy to overflow. The anti-overflow waterway heating system comprises a heating container, a make-up pump, a towel making water pump, a water spraying pipe and an air hole, a ventilation pipeline is arranged between the air hole and the heating container, and an anti-overflow box is arranged on the ventilation pipeline. The anti-overflow water box serves as a buffering medium, and water overflowing from the heating container enters the anti-overflow water box and cannot directly overflow from the air holes. Steam preferentially enters the anti-overflow water box and cannot be directly sprayed out of the air holes, the anti-overflow water box can slow down the flow speed of the steam, part of the steam is condensed in the anti-overflow water box, the temperature of exhausted gas is low, moisture is small, the risk of scalding caused by accidental contact is reduced, and electronic element corrosion or control panel failure is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of towel making machines, and relates to a towel making machine that prevents water overflow. Background Technology

[0002] The intelligent towel dispenser cuts large rolls of towels, wets them with hot water, rolls them up, and finally dispenses small, warm, damp towel rolls that fall into the dispensing slot for use. When a user needs a warm, damp towel, they simply operate the start switch on the machine to automatically dispense the towel roll, achieving intelligent output. The household hot towel dispenser disclosed in the utility model patent with authorization publication number CN218355961U invented by the inventor of this application is such an intelligent towel dispenser.

[0003] Most existing towel machine heating systems are directly open to the atmosphere for heating exhaust gas, which has the following drawbacks:

[0004] 1. The expansion coefficient of water varies in environments with different atmospheric pressures. In some high-altitude environments, the decrease in atmospheric pressure can cause the boiling point of water to drop. During heating, the amount of steam generated increases dramatically, causing expansion and posing a risk of water overflow.

[0005] 2. When the detection stop point of the heating tank is not detected when it is full (damaged, program crashes), continuous water replenishment will cause the heating tank to be overfilled. During the heating process, the water expands due to heat and lacks a pressure relief channel, eventually causing a column of high-temperature water to spray from the exhaust port, posing a risk of scalding to the user.

[0006] 3. The steam released during the heating process is directly discharged to the outside. It is hot and humid, which poses a risk of burns from accidental contact. The continuously discharged high-humidity steam is prone to condensation on the surface of the equipment, causing corrosion of electronic components or malfunction of the control panel. Summary of the Invention

[0007] This utility model addresses the problems existing in the prior art by proposing a water-heating system and a towel machine that prevents overflow, with the aim of overcoming the defect that existing towel machines are prone to overflow.

[0008] This utility model is implemented as follows:

[0009] An overflow-proof water heating system includes a heating tank, a water replenishment pump, a towel-making water pump, a water spray pipe, and a vent hole. The system is characterized in that a vent pipe is provided between the vent hole and the heating tank, and an overflow-proof box is provided on the vent pipe.

[0010] The water heating system includes a controller. The overflow box is equipped with a first water level sensor. The controller is connected to the first water level sensor and the water supply pump so that when the water level in the overflow box reaches a preset position, the controller controls the water supply pump to stop working.

[0011] The overflow prevention box is equipped with a float switch, which is connected in series with the water supply pump so that when the water level in the overflow prevention box reaches a preset position, the float switch disconnects the power supply to the water supply pump.

[0012] The volume of the overflow prevention box is greater than or equal to one-third of the volume of the heating element.

[0013] The bottom of the overflow prevention box is higher than the top of the heating element.

[0014] The venting pipe includes a first section connecting the vent and the overflow box, and a second section connecting the overflow box and the heating element. The first section is connected to the top of the overflow box, and the two ends of the second section are connected to the bottom of the overflow box and the top of the heating element, respectively.

[0015] The bottom of the heating element is equipped with a drain pipe, and a drain valve is installed on the drain pipe.

[0016] The heating tank is equipped with a second water level sensor, which is connected to the water supply pump so that when the water level in the heating tank reaches a preset position, the controller controls the water supply pump to stop working.

[0017] A thermostat is located at the bottom of the heating element.

[0018] The overflow prevention box is equipped with a baffle plate.

[0019] A towel machine, comprising a machine body, characterized in that the water heating system is installed on the machine body, and the machine body is also equipped with a material hopper, a towel guiding mechanism, a towel cutting mechanism, a towel rolling mechanism, and a towel receiving box.

[0020] The present invention has the following beneficial effects: The overflow prevention box acts as a buffer, preventing water overflowing from the heating element from directly escaping through the vent. Steam preferentially enters the overflow prevention box, preventing it from spraying out directly through the vent. The overflow prevention box slows down the steam flow rate, and some steam condenses within it, resulting in low-temperature and low-humidity exhaust gas, reducing the risk of accidental burns and preventing corrosion of electronic components or malfunction of the control panel. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the towel machine from the first angle.

[0022] Figure 2 This is a schematic diagram of the second angle structure of the towel machine;

[0023] Figure 3 This is a schematic diagram of the third-angle structure of the towel machine;

[0024] Figure 4 This is a cross-sectional view of the towel machine.

[0025] Figure 5 This is a schematic diagram showing the connection relationships of some components of a towel machine.

[0026] Figure labeling: 100, machine body; 110, vent; 111, vent pipe; 120, controller; 200, heating element; 210, water pump; 220, towel-making pump; 230, spray pipe; 240, drain pipe; 241, drain valve; 250, temperature controller; 260, second water level sensor; 300, towel rolling mechanism; 400, overflow prevention box; 410, first water level sensor; 500, hopper; 510, large roll towel; 600, towel guiding mechanism; 700, towel cutting mechanism; 800, towel receiving box. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] This embodiment provides a towel dispenser that prevents water overflow, such as... Figure 1-5 As shown, the device includes a body 100 and a water heating system. The water heating system includes a heating tank 200, a water replenishment pump 210, a towel-making water pump 220, a water spray pipe 230, and a vent 110. The water heating system is mounted on the body. Specifically, the body 100 contains the heating tank 200, the water replenishment pump 210, the towel-making water pump 220, and the water spray pipe 230. The body 100 is provided with a vent 110, and a vent pipe 111 is provided between the vent 110 and the heating tank 200. An overflow prevention box 400 is provided on the vent pipe 111.

[0029] The heating element 200 is connected to the vent 110 on the body 100 via a vent pipe 111. An overflow prevention box 400 is added to the vent pipe 111. The overflow prevention box 400 acts as a buffer, preventing water overflowing from the heating element 200 from directly escaping from the vent 110. Steam preferentially enters the overflow prevention box 400, preventing it from directly spraying out of the vent 110. The overflow prevention box 400 slows down the steam flow rate, and some steam condenses in the box, resulting in lower exhaust temperature and less moisture, reducing the risk of accidental burns and preventing corrosion of electronic components or malfunction of the control panel.

[0030] like Figure 5As shown, the overflow prevention box 400 is equipped with a first water level sensor 410, and the body 100 is equipped with a controller 120 connected to the first water level sensor 410 and the water replenishment pump 210. This allows the controller 120 to stop the water replenishment pump 210 when the water level in the overflow prevention box 400 reaches a preset position. The first water level sensor 410 detects the water level in the overflow prevention box 400 in real time, converting the physical water level change into an electrical signal. The controller 120 receives the electrical signal and compares it with a preset threshold. When the water level reaches a warning value, the controller 120 outputs a control signal to forcibly cut off the power to the water replenishment pump 210, terminating the water injection process. This further improves the overflow prevention effect.

[0031] In other optional embodiments, a float switch is installed on the overflow box 400, which is connected in series with the water supply pump 210 so that when the water level in the overflow box 400 reaches a preset position, the float switch disconnects the power supply to the water supply pump 210. The float switch, built into the overflow box 400, consists of a float, a connecting rod, and a micro switch. The float rises and falls with the water level, driving the micro switch to open and close via a lever mechanism. When the water level in the overflow box 400 rises to a preset threshold, the float pushes the connecting rod to trigger the micro switch, directly cutting off the power supply circuit to the water supply pump 210. This purely mechanical level control design requires no external power supply, achieving circuit control only through physical displacement, exhibiting strong anti-interference capabilities and low trigger delay. When the water level in the overflow box 400 decreases, the float falls back, the micro switch automatically closes, and the water supply pump 210 can resume operation.

[0032] Furthermore, the volume of the overflow prevention box 400 is greater than or equal to one-third of the volume of the heating element 200. This larger volume provides redundancy for the overflow prevention function to handle extreme situations, while the overflow prevention box 400 must provide sufficient condensation space to prevent direct steam release. Conversely, the volume of the overflow prevention box 400 is less than two-thirds of the volume of the heating element 200 to avoid occupying excessive space.

[0033] In other optional embodiments, baffles may be further provided within the overflow prevention box 400. The baffles may be arranged in a staggered pattern at a 45° angle to form an S-shaped flow channel, which reduces the impact force of the water flow and effectively prevents splashing after the fluid passes through the baffles. Steam condenses on the surface of the baffles to form a liquid film, and the surface tension is used to capture the liquid droplets in the steam, thereby improving the gas-liquid separation efficiency.

[0034] like Figure 2 , 5 As shown, the bottom of the overflow prevention box 400 is higher than the top of the heating element 200. Steam rises naturally to the high-level overflow prevention box 400, and condensate flows back to the heating element 200 by gravity in one direction, preventing water accumulation.

[0035] like Figure 5As shown, the vent pipe 111 includes a first section connecting the vent hole 110 and the overflow box 400, and a second section connecting the overflow box 400 and the heating tank 200. The first section is connected to the top of the overflow box 400, and the two ends of the second section are connected to the bottom of the overflow box 400 and the top of the heating tank 200, respectively. High-temperature steam, due to its low density, naturally rises to the high-level overflow box 400, where it undergoes preliminary condensation using the top space, reducing the amount of directly emitted hot and humid steam. The condensate flows unidirectionally back to the heating tank 200 due to gravity, forming a closed-loop circulation of steam rising and condensate falling. When the pressure inside the heating tank 200 increases, steam preferentially enters the overflow box 400 through the first section of the vent pipe 111. The condensate inside the box forms a liquid seal, buffering pressure fluctuations and slowing down the steam emission rate, preventing high-temperature water jets from splashing.

[0036] like Figure 5 As shown, the bottom of the heating tank 200 is equipped with a drain pipe 240, and a drain valve 241 is installed on the drain pipe 240. The drain pipe 240 is connected to the bottom of the heating tank 200, and uses the liquid level difference to achieve natural drainage, avoiding reliance on a water pump and reducing energy consumption. The drain valve 241 adopts a normally closed design, opening only during maintenance or drainage to prevent steam leakage during daily operation. When the pressure inside the heating tank 200 exceeds the safety threshold, the drain valve 241 can be configured to open with pressure sensing, releasing excess steam to the drainage system to prevent overpressure in the heating tank 200.

[0037] like Figure 5 As shown, the heating tank 200 is equipped with a second water level sensor 260. The main body 100 is equipped with a controller 120 connected to the second water level sensor 260 and the water supply pump 210. This allows the controller 120 to stop the water supply pump 210 when the water level in the heating tank 200 reaches a preset position. The system prioritizes responding to the signal from the second water level sensor 260, and automatically switches to the first water level sensor 410 when the second water level sensor fails, ensuring zero single-point failure in the water supply system.

[0038] like Figure 5 As shown, a thermostat 250 is provided at the bottom of the heating tank 200. The thermostat 250 monitors the temperature at the bottom of the heating tank 200 in real time. When the water level is too low, the temperature rises sharply, triggering a power-off protection.

[0039] The towel machine body 100 also includes a material hopper 500, a towel guiding mechanism 600, a towel cutting mechanism 700, a towel rolling mechanism 300, and a towel receiving box 800. The user loads a large roll of towels 510 into the material hopper 500 at the top of the machine body 100. The material hopper 500 has a built-in ultraviolet germicidal lamp to disinfect the surface of the large roll of towels 510. The large roll of towels 510 is then guided out by the towel guiding mechanism 600. After being guided to a specific length, it is cut by the towel cutting mechanism 700. Finally, the towel rolling mechanism 300 winds the cut towels into standard-sized towel rolls.

[0040] The towel machine can be connected to an external water source or have a built-in water tank, with water supplied to the heating tank 200 via a water replenishment pump 210. During the towel rolling process, the towel-making water pump 220, controlled by the controller 120, pumps the hot water from the heating tank 200 to the spray pipe 230. The spray pipe 230 sprays the hot water into a uniform mist onto the towel, achieving suitable humidity and temperature to form a warm, damp towel roll. Spraying water is not required when dry towels are needed.

[0041] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the utility model will be included within the scope of the claims.

Claims

1. A water heating system to prevent overflow, comprising a heating tank (200), a water supply pump (210), a towel-making pump (220), a spray pipe (230), and a vent (110), characterized in that, A vent pipe (111) is provided between the vent hole (110) and the heating tank (200), and an overflow box (400) is provided on the vent pipe (111).

2. The water heating system for preventing overflow according to claim 1, characterized in that, The water heating system includes a controller (120), and a first water level sensor (410) is installed on the overflow box (400). The controller (120) is connected to the first water level sensor (410) and the water supply pump (210) so that when the water level in the overflow box (400) reaches a preset position, the controller (120) controls the water supply pump (210) to stop working.

3. The water heating system for preventing overflow according to claim 1, characterized in that, The overflow box (400) is equipped with a floating switch, which is connected in series with the water supply pump (210) so that when the water level in the overflow box (400) reaches a preset position, the floating switch disconnects the power supply to the water supply pump (210).

4. The water heating system for preventing overflow according to claim 1, characterized in that, The volume of the overflow box (400) is greater than or equal to one-third of the volume of the heating element (200).

5. The water heating system for preventing overflow according to claim 1, characterized in that, The bottom of the overflow box (400) is higher than the top of the heating element (200).

6. The water heating system for preventing overflow according to claim 1, characterized in that, The vent pipe (111) includes a first section connecting the vent (110) and the overflow box (400) and a second section connecting the overflow box (400) and the heating tank (200). The first section is connected to the top of the overflow box (400), and the two ends of the second section are respectively connected to the bottom of the overflow box (400) and the top of the heating tank (200).

7. The water heating system for preventing overflow according to claim 1, characterized in that, The bottom of the heating element (200) is provided with a drain pipe (240), and a drain valve (241) is provided on the drain pipe (240).

8. The water heating system for preventing overflow according to claim 2, characterized in that, The heating tank (200) is equipped with a second water level sensor (260), which is connected to the second water level sensor (260) and the water supply pump (210) so that when the water level in the heating tank (200) reaches a preset position, the controller (120) controls the water supply pump (210) to stop working.

9. The water heating system for preventing overflow according to claim 1, characterized in that, A thermostat (250) is provided at the bottom of the heating element (200).

10. A towel machine, comprising a machine body, characterized in that, The water heating system of claim 1 is installed on the machine body (100), and the machine body (100) is also equipped with a hopper (500), a towel guiding mechanism (600), a towel cutting mechanism (700), a towel rolling mechanism (300), and a towel receiving box (800).

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