External water circulation device for bathtub

Abstract

The utility model provides an external water circulation device for a bathtub. The external water circulation device comprises a shell, a heating assembly and a microbubble assembly. The shell is provided with a water suction head and a water outlet head, the water suction head is connected with the water inlet side of the heating assembly, and the water outlet side of the heating assembly is connected with the water outlet head through the microbubble assembly; the microbubble assembly comprises a water pump, an air valve and a dissolved air tank, a water inlet of the water pump is connected with the water outlet side of the heating assembly and the air valve, and a water outlet of the water pump is connected with the water outlet head through the dissolved air tank; the water pump is communicated with the water suction head through the heating assembly, and the water suction head can be placed in a bathtub and can suck water in the bathtub into the heating assembly to be heated. According to the external water circulation device for the bathtub, the cyclic heating and heat preservation functions of a traditional bathtub can be achieved, and microbubble water outlet can be achieved.

Description

Technical Field

[0001] This utility model relates to a bathroom product, and more particularly to a water outlet device. Background Technology

[0002] With the improvement of living standards, bathing in a bathtub has gradually become an important way for people to relax. However, in the low temperatures of winter, the problem of rapid water temperature drop during bathing is particularly prominent. Traditional bathtubs usually rely on the initial injection of hot water for heat retention, but due to the high heat capacity of water and the high thermal conductivity of bathtub materials (such as ceramic and acrylic), heat is quickly lost through the surface of the tub, water evaporation, and air convection. Studies have shown that in environments with room temperatures below 10°C, the water temperature in a regular bathtub can drop by 5-8°C per hour, requiring users to frequently add hot water to maintain a comfortable temperature. This not only wastes water and energy resources but also seriously affects the continuity and safety of the bathing experience (especially for the elderly and children).

[0003] Currently, most solutions for bathtub insulation involve covering with an insulation layer (such as a bathtub cover or insulation film) or optimizing the bathtub structure (such as double-layer insulation walls). However, their insulation effect is limited and cannot effectively meet the needs of long-term soaking. Furthermore, the opening and closing of the cover may affect the ease of use.

[0004] Furthermore, traditional bathtubs can only provide hot water for soaking and cannot offer additional functions such as microbubble bathing. Some smart bathtubs can provide microbubble bathing, but users need to purchase a special smart bathtub to replace their regular bathtub, resulting in high replacement costs. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide an external water circulation device for bathtubs, which can realize the circulating heating and heat preservation function of traditional bathtubs, and can realize microbubble water output.

[0006] To solve the above-mentioned technical problems, this utility model provides an external water circulation device for a bathtub, including: a shell, a heating component, and a microbubble component; the shell is provided with a water suction head and a water outlet head, the water suction head is connected to the water inlet side of the heating component, and the water outlet side of the heating component is connected to the water outlet head through the microbubble component;

[0007] The microbubble assembly includes a water pump, an air valve, and a dissolved air tank. The water pump inlet is connected to the water outlet of the heating assembly and the air valve. The water pump outlet is connected to the water outlet head through the dissolved air tank. The water pump is connected to the water suction head through the heating assembly. The water suction head can be placed in the bathtub and can draw water from the bathtub into the heating assembly for heating.

[0008] In a preferred embodiment: a water-gas separator is provided inside the dissolved gas tank so that the gas-liquid mixture entering the dissolved gas tank by the water pump is separated by the water-gas separator.

[0009] In a preferred embodiment, the outlet of the dissolved air tank is located at the bottom of the dissolved air tank.

[0010] In a preferred embodiment: the upper part of the dissolved gas tank is provided with an exhaust port, and a float rises or sinks as the liquid level in the dissolved gas tank changes, so as to close or open the exhaust port.

[0011] In a preferred embodiment: an aerator is provided inside the water outlet head.

[0012] In a preferred embodiment: the heating assembly includes a heating tank, a flow meter, an NTC, and a silicon controlled rectifier (SCR) for controlling the heating power of the heating tank;

[0013] The water inlet of the heating tank is connected to the water suction head, the NTC and the flow meter are connected to the water outlet of the heating tank, and the signal output terminals of the NTC and the flow meter are connected to the thyristor, and the signal output terminal of the thyristor is connected to the heating tank.

[0014] In a preferred embodiment: the water suction head is connected to the water inlet side of the heating component via a hose, and the water outlet head is connected to the microbubble component via a hose;

[0015] The flexible hose is retractably disposed within the housing.

[0016] In a preferred embodiment: a filter screen is installed inside the water suction head.

[0017] In a preferred embodiment, the water intake head and the water outlet head are located on the top of the housing.

[0018] In a preferred embodiment: the top of the housing is further provided with a power switch, a microbubble switch, an output temperature control switch, and a temperature display screen.

[0019] In a preferred embodiment: the microbubble switch is used to control the opening and closing of the gas valve.

[0020] In a preferred embodiment, the water pump and dissolved air tank are located at the bottom of the housing.

[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0022] This utility model provides an external water circulation device for bathtubs. The external microbubble circulation device is portable and suitable for any ordinary bathtub in the home. It gives the bathtub the functions of circulating heating and microbubble bathing. The bathtub can circulate heating and maintain a constant temperature. Microbubble bathing has a better skin cleaning effect and promotes blood circulation, which is beneficial to health. It is low in cost and has a good user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0024] Figure 2 This is an internal schematic diagram of a preferred embodiment of the present invention;

[0025] Figure 3 This is a usage state diagram of a preferred embodiment of the present utility model;

[0026] Figure 4 This is a cross-sectional view of the water outlet head in a preferred embodiment of the present invention;

[0027] Figure 5 This is a water circuit diagram for the preferred embodiment of this utility model when conventional hot water is supplied;

[0028] Figure 6 This is a water circuit diagram for producing microbubble hot water in a preferred embodiment of the present invention. Detailed Implementation

[0029] To make the technical solution and features of this utility model clearer, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only for illustrating this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0030] refer to Figures 1-5This embodiment provides an external water circulation device for a bathtub, including a housing 1, a heating element 2, and a microbubble assembly 3. The housing 1 is provided with a water intake head 11 and a water outlet head 12. The water intake head 11 is connected to the water inlet side of the heating element 2, and the water outlet side of the heating element 2 is connected to the water outlet head 12 through the microbubble assembly 3. The microbubble assembly 3 includes a water pump 31, an air valve 32, and a dissolved air tank 33. The water inlet of the water pump 31 is connected to the water outlet side of the heating element 2 and the air valve 32, and the water outlet of the water pump 31 is connected to the water outlet head 12 through the dissolved air tank 33. In this embodiment, the water pump 31 and the dissolved air tank 33 are located at the bottom of the housing. The water pump 31 and the dissolved air tank 33 are relatively heavy, and placing them at the bottom of the housing results in a low center of gravity, which in turn lowers the center of gravity of the entire water circulation device, allowing it to be placed stably outside the bathtub and preventing it from tipping over. In use, the water circulation device is placed outside the bathtub. The suction head 11 is connected to the suction hose 17, and the outlet head 12 is connected to the outlet hose 18. The suction hose 17 and the outlet hose 18 can be pulled out and retracted into the outer casing 1 of the external water circulation device. After the suction head 11 and the outlet head 12 are pulled out of the casing 1, they can be placed into the bathtub. After turning on the water pump 31, water in the bathtub can be drawn out from the suction head 11, heated, and then returned to the bathtub from the outlet head 12. When not in use, the suction hose 17 and the outlet hose 18 are stored in the outer casing 1 of the external water circulation device, without occupying additional space. A filter screen 111 can also be installed in the suction head 11 to filter particulate impurities in the water when the suction head is drawing water, preventing them from entering the heating tank and settling.

[0031] The aforementioned external water circulation device for bathtubs allows the heating element to draw water from the bathtub, heat it, and then return it to the bathtub, creating a circulating heating system. This maintains the water in the bathtub at a comfortable temperature, preventing the water temperature from dropping over time and affecting bathing comfort. Furthermore, this external heating device is compatible with any bathtub, requiring no modifications to the user's existing bathtub. Additionally, there is no rigid connection between the external water circulation device and the bathtub, allowing for easy storage after use and saving bathroom space. Finally, this external water circulation device also features a microbubble component 3, producing microbubble water. When the microbubbles come into contact with the skin, they penetrate deep into the pores, effectively removing dirt. The hydroxyl radicals generated by the microbubbles quickly react with bacteria, deactivating them. The high concentration of microbubbles effectively removes skin oils, further enhancing user comfort.

[0032] In this embodiment, a water-air separator is provided inside the dissolved gas tank 33 to separate the gas-liquid mixture entering the dissolved gas tank 33 by the water pump 31. When the air valve 32 is opened, the water pump 31 draws water while creating a negative pressure at the water inlet of the water pump 31, which draws air into the water pump 31 from the air valve 32, causing the water and air to mix together and enter the dissolved gas tank 33. Inside the dissolved gas tank 33, the water and air mix together and collide with the water-air separator or pass through the water-air separator with an increasing cross-section. The different speeds of the water and air cause them to separate. Since the gas is lighter, it accumulates at the top of the dissolved gas tank 33, and the water is heavier, it accumulates at the bottom. Because the outlet of the dissolved gas tank 33 is located at the bottom, when the water level at the bottom of the dissolved gas tank 33 exceeds the outlet, the gas cannot flow out from the outlet. As a result, more and more gas accumulates at the top of the tank, and the gas pressure inside the dissolved gas tank 33 gradually increases. The increased air pressure allows water-soluble components in the air to dissolve further into the water, forming highly concentrated air-containing water that then flows out of the outlet. This results in water containing a large amount of air flowing out of the outlet.

[0033] Meanwhile, as the amount of insoluble gas in the dissolved gas tank 33 increases, the expanding gas causes the water level in the tank to gradually decrease, preventing water from flowing out. To solve this problem, an exhaust port is located at the top of the dissolved gas tank 33. A float rises or sinks depending on the liquid level in the tank, thus opening or closing the exhaust port. Therefore, when the liquid level in the tank falls below a set value, the float sinks, opening the exhaust port and allowing some of the gas to be released quickly to relieve pressure. The liquid level then rises again, closing the exhaust port. After the exhaust port closes, the tank returns to a pressurized state. Through this repeated cycle, the liquid level in the tank remains within a stable range, ensuring the continuous discharge of high-concentration gaseous water. Finally, an aerator 121 is installed inside the water outlet 12. High-concentration gas-containing water, after passing through the small holes of the aerator, releases the gas in the water, forming a milky white water stream rich in microbubbles. The specific process of gas dissolution and microbubble formation in the dissolved gas tank 33 is only briefly described in this embodiment; for a detailed gas dissolution process, please refer to the technical content disclosed in patent CN202421047514.8.

[0034] In this embodiment, the heating assembly 2 includes a heating tank 21, a flow meter 22, an NTC 23, and a silicon controlled rectifier (SCR) 24 for controlling the heating power of the heating tank 21. The inlet of the heating tank 21 is connected to the suction head 11. The NTC 23 and the flow meter 22 are connected to the outlet of the heating tank 21, and the signal output terminals of the NTC 23 and the flow meter 22 are connected to the SCR 24. The signal output terminal of the SCR 24 is connected to the heating tank 21. The flow meter 22 detects the flow rate of water flowing out of the heating tank 21. If the flow rate is low, the heating function is not activated, thus preventing the heating tank 21 from drying out. The NTC 23 detects the outlet water temperature of the heating tank 21 and feeds it back to the control system. The control system compares the outlet water temperature of the heating tank 21 with the target water temperature set by the user, and then dynamically adjusts the heating power of the heating tank 21 through the SCR 24. Specifically: The control system detects the target water temperature input by the user and calculates the outlet water temperature of the heating tank 21 to determine the power required for the heating tank 21 to heat the water to reach the target water temperature. The heating power of the heating tank 21 is adjusted by regulating the duty cycle of the PWM signal so that the outlet water temperature of the heating tank 21 reaches a certain range near the target water temperature. Then, the water pump 31 is fine-tuned to increase / decrease the amount of water entering the heating tank 21, so that the output water temperature meets the target water temperature set by the user.

[0035] In this embodiment, the water intake head 11 and the water outlet head 12 are located on the top of the outer casing 1. The top of the outer casing 1 also houses a power switch 13, a microbubble switch 14, an output temperature control switch 15, and a temperature display screen 16. The user can activate the external water circulation device using the power switch 13 and control the opening and closing of the air valve 32 using the microbubble switch 14, thereby turning the microbubble function on or off. The user can also adjust the target water temperature using the output temperature control switch 15 and display the target water temperature visually on the temperature display screen 16.

[0036] The external water circulation device for the bathtub in this embodiment operates as follows: After filling the bathtub with water to a certain level, the user places the device outside the bathtub, pulls out the suction head 11 and the outlet head 12, and places them into the bathtub. Pressing the power switch 13 starts the water pump, continuously drawing water from the bathtub into the heating tank for circulation and heating. Pressing the power switch 13 again stops the circulation and heating, or the system can be set to circulate and heat for a set time before stopping. After pressing the power switch 13, pressing the microbubble switch 14 causes the water pump 31 to draw water while simultaneously creating negative pressure at its inlet. This draws air into the water pump 31 through the air valve 32, mixing the water and air together to form microbubble water in the dissolved air tank 33. Pressing the microbubble switch 14 again stops the flow of microbubble water. The operation is simple and convenient, making it easy for users to use.

[0037] The above is only one specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model.

Claims

1. An external water circulation device for a bathtub, characterized in that... include: The housing comprises a heating element and a microbubble assembly. The housing is provided with a water intake head and a water outlet head. The water intake head is connected to the water inlet side of the heating element, and the water outlet side of the heating element is connected to the water outlet head through the microbubble assembly. The microbubble assembly includes a water pump, an air valve, and a dissolved air tank. The water pump inlet is connected to the water outlet of the heating assembly and the air valve. The water pump outlet is connected to the water outlet head through the dissolved air tank. The water pump is connected to the water suction head through the heating assembly. The water suction head can be placed in the bathtub and can draw water from the bathtub into the heating assembly for heating.

2. An external water circulation device for a bathtub according to claim 1, characterized in that: The outlet of the dissolved air tank is located at the bottom of the dissolved air tank.

3. An external water circulation device for a bathtub according to claim 1, characterized in that: The water outlet is equipped with an aerator, and the water outlet can be placed in the bathtub and can inject water from the dissolved air tank into the bathtub.

4. An external water circulation device for a bathtub according to claim 1, characterized in that: The heating assembly includes a heating tank, a flow meter, an NTC, and a silicon controlled rectifier (SCR) for controlling the heating power of the heating tank. The water inlet of the heating tank is connected to the water suction head, the NTC and the flow meter are connected to the water outlet of the heating tank, and the signal output terminals of the NTC and the flow meter are connected to the thyristor, and the signal output terminal of the thyristor is connected to the heating tank.

5. An external water circulation device for a bathtub according to claim 1, characterized in that: The water intake head is connected to the water inlet side of the heating component via a hose, and the water outlet head is connected to the microbubble component via a hose. The flexible hose is retractably disposed within the housing.

6. An external water circulation device for a bathtub according to claim 1, characterized in that: A filter screen is installed inside the water suction head.

7. An external water circulation device for a bathtub according to claim 1, characterized in that: The water intake head and water outlet head are located on the top of the housing.

8. An external water circulation device for a bathtub according to claim 7, characterized in that: The top of the housing is also equipped with a power switch, a microbubble switch, an output temperature control switch, and a temperature display screen.

9. An external water circulation device for a bathtub according to claim 8, characterized in that: The microbubble switch is used to control the opening and closing of the gas valve.

10. An external water circulation device for a bathtub according to claim 1, characterized in that: The water pump and dissolved air tank are located at the bottom of the casing.

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