A heat-insulating and scalding-proof double-walled hot water tank

Abstract

This utility model relates to a hot water tank, and more particularly to a heat-insulating and scalding-proof double-layer hot water tank. It overcomes the welding defects and over-reliance on the high vacuum level of the vacuum layer in existing double-layer hot water tanks for heat insulation and scalding prevention. The heat-insulating and scalding-proof double-layer hot water tank includes a tank body that is vertically oriented and has an internal cavity, placed on a table. A lid is fitted onto the top of the tank body. A water outlet valve passes through the tank body and connects to the hot water layer, which is vertically positioned within the cavity of the tank body. A vacuum cavity is formed between the hot water layer and the inner side of the tank body. The ultra-low thermal conductivity of the aerogel particles further effectively blocks heat transfer within the vacuum cavity, further preventing the tank body temperature from becoming too high, thus achieving a heat insulation and scalding-proof effect.

Description

Technical Field

[0001] This utility model relates to a hot water tank, and more particularly to a heat-insulating and scalding-proof double-layer hot water tank. Background Technology

[0002] In commercial catering settings, double-walled hot water tanks, consisting of a tank body, lid, outlet valve, hot water layer, and vacuum components, are widely used due to their excellent heat preservation performance. Their insulation effect primarily relies on the vacuum layer design between the two tank walls, creating a low thermal conductivity environment through vacuuming to block heat transfer between the inner and outer layers. However, existing technologies for constructing the vacuum chamber in double-walled hot water tanks have significant flaws: the traditional rigid welding process at the joint of the two tank walls leads to stress concentration at the welded areas during long-term storage of high-temperature hot water due to the thermal expansion and contraction of the metal caused by hot and cold cycles, resulting in cracks and leaks. Furthermore, once air enters the vacuum chamber, it forms a heat conduction channel, allowing the temperature of the inner tank to diffuse to the outer tank body, causing a rise in the outer wall temperature and posing a serious risk of burns. Therefore, the heat preservation performance of traditional double-walled tanks is highly dependent on maintaining a vacuum level; when air enters the vacuum chamber, the insulation performance drops sharply. Utility Model Content

[0003] In order to overcome the shortcomings of existing double-layer hot water tanks, such as welding defects and over-reliance on the high vacuum degree of the vacuum layer for heat insulation and scalding prevention, this utility model provides a heat-insulating and scalding-proof double-layer hot water tank that effectively compensates for thermal expansion and contraction, eliminates stress problems at the welding parts, and also reduces the dependence on the high vacuum degree of the vacuum layer.

[0004] The technical solution is: a heat-insulating and anti-scalding double-layer hot water tank, comprising a main body, a hot water component and a sealing element. The hot water component is welded to the tank body of the main body. There is a vacuum cavity between the tank body and the hot water component. The sealing element is disposed in the vacuum cavity. One end of the sealing element is connected to the hot water component and the other end is connected to the tank body. The sealing element isolates the weld of the hot water component from the vacuum cavity.

[0005] Furthermore, the sealing element includes a filler and a sealing sticker. One end of the sealing sticker is connected to the tank body, and the other end is connected to the hot water component. The sealing sticker is overlapped and wrapped to form a tight constraint force that tightly adheres the filler to the weld of the hot water component.

[0006] The sealing element includes a shrink-stretch band 10, which is fitted around the middle of the sealing patch located on one side of the vacuum chamber.

[0007] The filler is aerosol particles.

[0008] The hot water assembly includes a corrugated pipe, which is arranged in a ring-shaped vertical corrugated structure in the tank body.

[0009] The vacuum assembly is detachably located at the bottom of the barrel.

[0010] The vacuum assembly includes a vacuum extraction valve, which is detachably connected to the center of the bottom of the barrel via a thread.

[0011] The beneficial effects are:

[0012] 1. By amplifying the elastic deformation capacity of the material through the geometric design of the corrugated tube, the displacement caused by thermal expansion and contraction is effectively transformed into controllable folding and bending, thereby releasing the stress caused by thermal expansion and contraction.

[0013] 2. By using a sealing sticker, the aerosol particles are brought into close contact with the weld seam. When cracks occur in the weld seam, the aerosol particles can be inserted into the cracks to fill and seal them, thus maintaining the seal. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the barrel body, barrel lid, and water outlet valve of this utility model.

[0015] Figure 2 This is a partial three-dimensional structural diagram of the water outlet valve, hot water layer, and vacuum component of this utility model.

[0016] Figure 3 This utility model Figure 2 A magnified three-dimensional structural diagram of A in the middle.

[0017] Figure 4 This is a three-dimensional structural diagram of the vacuum extraction valve and vacuum extraction nozzle of this utility model.

[0018] Reference numerals: 1. Bucket body; 2. Bucket lid; 3. Water outlet valve; 4. Support base; 5. Corrugated pipe; 6. Hot water cylinder; 7. Vacuum extraction valve; 8. Vacuum extraction nozzle; 9. Sealing tape; 10. Shrink tension band; 11. Aerosol particles. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Example 1:

[0021] See Figures 1-4As shown, a heat-insulating and anti-scalding double-layer hot water tank includes a main body, a hot water component, a vacuum component, and a sealing element. The main body includes a tank body 1, a lid 2, and a water outlet valve 3. The tank body 1 is placed vertically on a table with a built-in cavity. The lid 2 is inserted into the top of the tank body 1. The hot water component is vertically disposed in the cavity of the tank body 1. The water outlet valve 3 passes through the tank body 1 and connects to the hot water layer. The hot water layer is vertically disposed in the cavity of the tank body 1. A vacuum cavity is formed between the hot water component and the inner side of the tank body 1. The vacuum component is detachably disposed at the bottom of the tank body 1 and communicates with the vacuum cavity.

[0022] The hot water assembly includes a support base 4, a corrugated pipe 5, and a hot water cylinder 6. The support base 4 is fixed to the inner side of the bottom of the tank body 1. The support base 4 has an annular inverted conical structure and four strip grooves at the bottom. The corrugated pipe 5 has an annular vertical corrugated structure and is fixed to the inner side of the upper part of the tank body 1. The bottom of the hot water cylinder 6 is fixed to the top of the support base 4. The top of the hot water cylinder 6 is fixedly connected to the corrugated pipe 5. The hot water cylinder 6 has a concave structure.

[0023] The vacuum assembly includes a vacuum valve 7 and a vacuum nozzle 8. The vacuum valve 7 is detachably connected to the bottom center of the barrel 1 by a thread, and the vacuum nozzle 8 is located at the center of the vacuum valve 7 and communicates with the vacuum chamber.

[0024] Before using the double-walled hot water tank, since a vacuum chamber is formed between the tank body 1 and the hot water layer, the user needs to remove the lid 2 from the top of the tank body 1, then flip the tank body 1 upside down, connect the external vacuum pump to the vacuum assembly, and extract the air from the vacuum chamber, making the vacuum chamber almost empty of gas molecules. After that, the tank body 1 is reset, and hot water is poured into the hot water layer. Since there are very few gas molecules in the vacuum chamber, and heat convection relies on the flow of the medium to transfer heat, convection heat transfer is basically eliminated, cutting off the path of heat transfer through air flow. This effectively reduces the amount of heat transferred from the hot water layer to the tank body 1, preventing the tank body 1 from getting too hot and achieving the effect of heat insulation and scalding prevention.

[0025] In the above technical solution, although it is mentioned that the vacuum component can be removed and an external vacuum pump can be used to evacuate the vacuum chamber, the vacuum pump valve 7 and the vacuum pump nozzle 8 are actually integrated. The vacuum pump nozzle 8 has a built-in one-way valve, which prevents outside air from entering the vacuum chamber through the one-way valve. By connecting the external vacuum pump to the vacuum pump nozzle 8, the air in the vacuum chamber can be extracted. It can also be detached and removed by the threaded groove at the bottom of the cylinder and the threaded engagement on the surface of the vacuum pump valve 7. The user holds the vacuum pump valve 7 and rotates it counterclockwise, and the vacuum pump valve 7 is removed along the threaded groove at the bottom of the cylinder, which facilitates the later inspection of the vacuum chamber.

[0026] Based on the above technical solution, although the vacuum state of the vacuum chamber can provide heat insulation and prevent scalding, the hot water tank 6 in the hot water layer, due to its large capacity for storing hot water, is often made of stainless steel to ensure durability. Since the hot water tank 6 is in direct contact with the hot water, when it stores high-temperature hot water, it will experience significant thermal expansion and contraction due to temperature changes. Especially in scenarios involving frequent filling and emptying of hot water, repeated temperature fluctuations will cause the hot water tank 6 to continuously undergo cycles of expansion and contraction, leading to the accumulation of periodic stress at the weld joint between the hot water tank 6 and the tank body 1. If this stress is not effectively released, it will cause the weld to crack. Because the hot water tank 6 and the vacuum chamber... The connection between the hot water cylinder 6 and the body 1 is prone to cracking, which can cause the vacuum chamber to become unsealed. When the external pressure is greater than the internal pressure of the vacuum chamber, a large number of air molecules will enter the vacuum chamber through the cracks, thereby reducing the heat insulation and anti-scalding effect of the vacuum chamber. To address the above problems, this embodiment provides a ring-shaped vertically arranged corrugated tube 5 to address the problem that the weld between the hot water cylinder 6 and the body 1 is prone to cracking due to thermal expansion and contraction. The geometric design of the corrugated tube 5 amplifies the elastic deformation capacity of the material, effectively converting the displacement caused by thermal expansion and contraction into controllable folding and bending, thereby releasing the stress of thermal expansion and contraction. At the same time, the inverted conical support 4 can stably provide support to the bottom of the hot water cylinder 6.

[0027] Based on the above technical solution, although the displacement caused by thermal expansion and contraction can be effectively converted into controllable wrinkling and bending through the corrugated tube 5, excessive wrinkling and bending over a long period of use will inevitably lead to cracking of the weld. To address this problem, in this embodiment, a sealing element can be used to seal the vacuum chamber inside the corrugated tube 5. The sealing element specifically includes a sealing sticker 9, a tensioning band 10, and aerosol particles 11. The sealing sticker 9 is attached to the upper inner side of the barrel 1 with adhesive, and the lower end is attached to the side of the hot water cylinder 6 near the vacuum chamber. The two parts are overlapped and wrapped to form a tight constraint. The aerosol particles 11 are located in the area between the sealing sticker 9 and the side of the corrugated tube 5 near the vacuum chamber. The sealing sticker 9 ensures that the aerosol particles 11 are tightly sealed to the weld. When the weld seam cracks, the aerosol particles 11 can be inserted into the crack to fill and seal it, maintaining a tight seal. Since the external pressure is greater than the internal pressure, the external pressure will continuously exert pressure on the aerosol particles 11 through the crack. Additionally, the sealing tape 9's own tightening force decreases over time. Therefore, a shrinkage tension band 10 is fitted on the side of the sealing tape 9 away from the bellows 5. The shrinkage tension band 10 has a deformable elastic force and is made of a highly elastic deformable material. Utilizing its own pre-stretch elastic recovery force, it continuously applies a radial shrinkage constraint force to the sealing tape 9. This elastic tightening force can effectively counteract the lateral pressure transmitted from the external pressure through the crack to the aerosol particles 11 and the sealing tape 9.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A heat-insulating and scalding-proof double-walled hot water tank, characterized in that: It includes a main body, a hot water component and a sealing element. The hot water component is welded inside the tank (1) of the main body. There is a vacuum cavity between the tank (1) and the hot water component. The sealing element is located in the vacuum cavity. One end of the sealing element is connected to the hot water component and the other end is connected to the tank (1). The sealing element isolates the weld of the hot water component from the vacuum cavity.

2. The heat-insulating and anti-scalding double-layer hot water tank according to claim 1, characterized in that: The sealing element includes a filler and a sealing sticker (9). One end of the sealing sticker (9) is connected to the tank body (1), and the other end is connected to the hot water component. The sealing sticker (9) is overlapped and wound to form a tight constraint force to tightly fit the filler and the weld of the hot water component.

3. The heat-insulating and anti-scalding double-layer hot water tank according to claim 1, characterized in that: The sealing element includes a shrink-stretch band (10), which is fitted onto the sealing patch (9) in the middle of one side of the vacuum chamber.

4. The heat-insulating and anti-scalding double-layer hot water tank according to claim 2, characterized in that: The filler is aerosol particles (11).

5. A heat-insulating and scalding-proof double-layer hot water tank according to claim 1, characterized in that: The hot water assembly includes a corrugated pipe (5), which is arranged in a ring-shaped vertical corrugated structure on the tank body (1).

6. A heat-insulating and scalding-proof double-layer hot water tank according to claim 5, characterized in that: The hot water assembly includes a hot water cylinder (6), and the vacuum chamber is concave and encloses the hot water cylinder (6).

7. The heat-insulating and anti-scalding double-layer hot water tank according to claim 1, characterized in that: The vacuum assembly is detachably located at the bottom of the barrel (1).

8. A heat-insulating and scalding-proof double-walled hot water tank according to claim 7, characterized in that: The vacuum assembly includes a vacuum extraction valve (7), which is detachably connected to the bottom center of the barrel body (1) via a thread.

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