Vacuum cup air inlet valve
By designing an air intake assembly consisting of a sealing plug, guide rod, and return spring into the thermos, the air pressure is automatically adjusted, solving the problem of air pressure difference when the water temperature drops. This achieves smooth lid opening and leak-proof performance, improving ease of use and heat preservation.
Patent Information
- Application Number
- CN202423161955.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing thermos cups experience a decrease in internal air pressure when the water temperature drops, making it difficult to open the lid and potentially causing the inner liner to deform.
Design an air inlet valve for a thermos cup, comprising an air inlet assembly consisting of a sealing plug, a guide rod, a push plate, and a return spring. By automatically adjusting the air pressure inside and outside the cup, the lid can be opened smoothly and water leakage can be prevented when the cup is tipped over.
It effectively balances the air pressure inside and outside the cup, avoids the problem of the lid being difficult to open, improves the convenience of use, prevents water leakage when tipped over, and extends the heat preservation time.
Smart Images
Figure CN223541736U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of thermos cup technology, specifically a thermos cup air inlet valve. Background Technology
[0002] To achieve good heat retention, modern insulated cups typically employ a lid design with excellent sealing performance. This sealing design aims to reduce heat loss through air convection, and common sealing methods include silicone sealing rings.
[0003] When the water temperature inside a thermos drops and the internal air pressure decreases, the external atmospheric pressure will press the lid tightly against the cup, increasing the friction between the lid and the cup body, making it difficult to open. In severe cases, this can cause the inner liner to deform.
[0004] To address this issue, those skilled in the art have proposed an air inlet valve for insulated cups to solve the problems raised in the background art. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides an air inlet valve for a thermos cup, which solves the problems in the prior art where the water temperature inside the thermos cup drops, the internal air pressure decreases, making it difficult to open the lid and causing the inner liner to deform.
[0006] A thermos cup air inlet valve includes: a cup body, a cup lid installed on the cup body, a sealing cap fixed to the inner wall of the cup lid, an air inlet chamber formed between the sealing cap and the cup lid, an air inlet hole penetrating the bottom surface of the air inlet chamber, and a through hole penetrating the top surface of the air inlet chamber;
[0007] An intake assembly includes a sealing plug, a guide rod, a push plate, and a return spring; the guide rod slides within the intake port, and the size of the guide rod is smaller than the intake port; one end of the guide rod is connected to the sealing plug, and the other end of the guide rod is connected to the push plate; a return spring is installed between the sealing plug and the push plate; and the sealing plug is located at the lower end of the intake port.
[0008] Preferably, the sealing plug has a fan-shaped structure.
[0009] Preferably, a filter assembly is installed on the top surface of the air intake chamber. The filter assembly includes a vent frame and filter cotton. The position of the vent frame corresponds to the through hole. A vent groove is formed on the inner wall of the vent frame, and the filter cotton is filled in the vent groove.
[0010] Preferably, the outer edge of the cup body is provided with external threads, and the cup lid is threadedly engaged with the external threads.
[0011] Preferably, a sealing ball is installed on the inner wall of the sealing plug.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] This invention features an air intake component that automatically adjusts to changes in internal air pressure, effectively balancing the pressure inside and outside the cup and preventing the lid from being difficult to open due to pressure differences. This greatly facilitates the use of the thermos. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 for Figure 1 Enlarged view of part A in the middle.
[0016] In the picture:
[0017] 1. Cup body; 2. Cup lid; 201. Sealing cap; 202. Air inlet chamber; 203. Air inlet hole; 204. Through hole; 3. External thread; 4. Air inlet assembly; 401. Sealing plug; 402. Guide rod; 403. Push plate; 404. Return spring; 5. Filter assembly; 501. Ventilation frame; 502. Ventilation groove; 503. Filter cotton. Detailed Implementation
[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0019] Example 1: As shown in the attached document Figure 1 and attached Figure 2 As shown, this utility model provides an air inlet valve for a thermos cup, including a cup body 1 and an air inlet assembly 4:
[0020] The cup body 1 has a lid 2 installed on it. The outer edge of the cup body 1 is provided with an external thread 3. The lid 2 is threadedly engaged with the external thread 3. By setting the external thread 3, the lid 2 is stably connected to the cup body 1 through the thread, ensuring the sealing performance of the cup body 1. A sealing cap 201 is fixed to the inner wall of the lid 2. An air inlet chamber 202 is formed between the sealing cap 201 and the lid 2. An air inlet hole 203 is penetrating through the bottom surface of the air inlet chamber 202, and a through hole 204 is penetrating through the top surface of the air inlet chamber 202. By using the air inlet chamber 202 in conjunction with the air inlet hole 203 and the through hole 204, it is ensured that after the water temperature drops, the outside air can enter the cup body 1 through the air inlet chamber 202.
[0021] As attached Figure 2As shown, the air intake assembly 4 includes a sealing plug 401, a guide rod 402, a push plate 403, and a return spring 404. The guide rod 402 slides within the air intake hole 203, and the size of the guide rod 402 is smaller than that of the air intake hole 203. Because the size of the guide rod 402 is smaller than that of the air intake hole 203, it is prevented from blocking the air intake hole 203 after being pushed. At the same time, the air intake hole 203 acts as a limit. One end of the guide rod 402 is connected to the sealing plug 401, and the other end of the guide rod 402 is connected to the push plate 403. The return spring 404 is installed between the sealing plug 201 and the push plate 403. The sealing plug 401 is located at the lower end of the air intake hole 203. When the return spring 404 is in a stable state, it ensures that the sealing plug 401 blocks the air intake hole 203, thereby ensuring the airtightness of the thermos cup.
[0022] When the temperature of the hot water in the thermos drops, the air pressure inside the cup body 1 decreases due to the contraction caused by the cold, creating a pressure difference with the outside. When the pressure difference reaches a threshold, the sealing plug 401 and the push plate 403 move towards the inside of the cup body 1 at the same time. At this time, the return spring 404 is compressed. When the sealing plug 401 disengages from the air inlet 203, an airflow passage is formed, and the outside air is quickly introduced into the cup body 1, keeping the cup body 1 in a state of relative balance with the outside air pressure. At this time, the cup lid 2 can be easily rotated to open the cup lid 2. When the air pressure inside the cup body 1 is balanced with the outside air pressure, the return spring 404 returns to its original position, and the sealing plug 401 resumes blocking the air inlet 203, thus re-sealing the air inlet 203.
[0023] If the thermos cup tipes over, water will quickly accumulate inside the cup body 1 at the sealing plug 401. Since the sealing plug 401 adopts a fan-shaped design, the sealing plug 401 can be squeezed more tightly at the air inlet 203 due to water pressure, which avoids water leakage caused by the tipping over of the cup body 1 and improves the stability of the device.
[0024] The sealing plug 401 has a fan-shaped structure, and a sealing ball is installed on the inner wall of the sealing plug 401. The size of the sealing ball corresponds to the air inlet 203. The sealing ball can work with the sealing plug 401 to improve the blocking effect on the air inlet 203, thereby improving the sealing performance.
[0025] As can be seen from the above, when hot water is poured into the cup body 1, the air inside the cup expands due to heat. At this time, the air pressure inside the cup is greater than the external air pressure. Due to the air pressure, the sealing plug 401 can fit more tightly against the air inlet 203. At this time, because the sealing plug 401 blocks the air inlet 203 under the action of the return spring 404, the cup body is in a sealed state. Heat is slowly dissipated through the cup body 1 and the cup lid 2, and the water temperature gradually decreases. As the water temperature decreases, the air inside the cup contracts, the air pressure decreases, and a pressure difference is formed with the external atmospheric pressure.
[0026] When the pressure difference reaches a certain threshold, the external atmospheric pressure pushes the sealing plug 401 and the connected push plate 403 into the cup body, the guide rod 402 slides in the air inlet 203, and the return spring 404 is compressed. When the sealing plug 401 disengages from the air inlet 203, an airflow passage is formed, and external gas is quickly introduced into the cup body 1 through the through hole 204 of the air inlet chamber 202, the air groove 502 of the air frame 501, and the air inlet 203, so that the air pressure inside and outside the cup body is kept relatively balanced; then the cup lid 2 can be easily rotated to open it.
[0027] Once the air pressure inside the cup is balanced with the outside air, the return spring 404 returns to its original position, pushing the sealing plug 401 to re-block the air inlet 203 and restore the seal. Under normal conditions, the sealing plug 401 can effectively block the air inlet 203 under the action of the return spring 404, ensuring the good sealing performance of the thermos cup, reducing heat loss, and extending the heat preservation time.
[0028] If the thermos tipes over, the water inside will quickly accumulate at the sealing plug 401, which has a fan-shaped structure and a sealing ball on its inner wall. The water pressure will cause the sealing plug 401 to be pressed more tightly against the air inlet 203 to prevent leakage.
[0029] Example 2: Based on Example 1, a filter assembly 5 is installed on the top surface of the air intake chamber 202. The filter assembly 5 includes a ventilation frame 501 and a filter cotton 503. The position of the ventilation frame 501 corresponds to the through hole 204. A ventilation groove 502 is formed on the inner wall of the ventilation frame 501, and the filter cotton 503 is filled in the ventilation groove 502.
[0030] As can be seen from the above, by forming the ventilation groove 502, gas can enter the air inlet 203 through the ventilation groove 502. During the air intake process, the gas passes through the filter cotton 503, which filters the gas to prevent external impurities from entering the cup body 1, thus ensuring the safety of the thermos cup and preventing water pollution.
[0031] As the gas enters the cup body 1, it is filtered by the filter cotton 503, which can effectively prevent external impurities from entering the water inside the cup, ensuring the purity and safety of the beverages contained in the thermos cup, and avoiding impurities from affecting the taste of the beverages or causing potential harm to human health. It is especially suitable for scenarios with high water quality requirements.
[0032] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.
Claims
1. A thermos cup air inlet valve, characterized in that: include: A cup body (1) is provided with a cup lid (2). A sealing cap (201) is fixed to the inner wall of the cup lid (2). An air intake chamber (202) is formed between the sealing cap (201) and the cup lid (2). An air intake hole (203) is passed through the bottom surface of the air intake chamber (202). A through hole (204) is passed through the top surface of the air intake chamber (202). An intake assembly (4) includes a sealing plug (401), a guide rod (402), a push plate (403), and a return spring (404). The guide rod (402) slides within the intake hole (203), and the size of the guide rod (402) is smaller than that of the intake hole (203). One end of the guide rod (402) is connected to the sealing plug (401), and the other end of the guide rod (402) is connected to the push plate (403). A return spring (404) is installed between the sealing plug (201) and the push plate (403). The sealing plug (401) is located at the lower end of the intake hole (203).
2. The inlet valve for a thermos cup as described in claim 1, characterized in that: The sealing plug (401) has a fan-shaped structure.
3. The inlet valve for a thermos cup as described in claim 2, characterized in that: A filter assembly (5) is installed on the top surface of the air intake chamber (202). The filter assembly (5) includes a ventilation frame (501) and filter cotton (503). The ventilation frame (501) is positioned corresponding to the through hole (204). A ventilation groove (502) is formed on the inner wall of the ventilation frame (501). The filter cotton (503) is filled in the ventilation groove (502).
4. The inlet valve for a thermos cup as described in claim 1, characterized in that: The outer edge of the cup body (1) is provided with an external thread (3), and the cup lid (2) is threadedly engaged with the external thread (3).
5. The inlet valve for a thermos cup as described in claim 2, characterized in that: A sealing ball is installed on the inner wall of the sealing plug (401).