JPS6329475Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an electric heat-retaining pot, etc., commonly known as an air pot, which is equipped with an air pump to supply pressurized air into the container body, and injects liquid through a liquid pumping pipe that opens at the bottom of the container. This is a device for a heat-insulating container.

Conventional heat-retaining containers of this type generally have a liquid lifting tube attached to a stopper that seals the container body. However, when removing the stopper when replenishing hot water into the container body, it is difficult to find a place to put it because the liquid lifting pipe connected to the water is integrated, and the contents There was a drawback that it was not possible to directly see the liquid level.

In order to eliminate this drawback, a liquid lift pipe was provided that penetrated the bottom wall of the container body, and the liquid lift pipe itself was made of a transparent material so that the amount of liquid inside could be viewed directly (Utility Model Publication No. 57-42344). However, with such a device, the liquid that has accumulated in the transparent part exposed to the outside easily cools down, and the liquid that has accumulated in the transparent part is always poured at the beginning of injection. Due to design restrictions, the placement of the relatively large-diameter liquid lift pipe
There is a drawback in that it is difficult to place display items such as a boiling water indicator or a heat retention indicator lamp below the level gauge. To solve this problem, it may be possible to provide a level gauge and a liquid pumping pipe independently and have each pass through the container body. The pipes have to be fixed while maintaining the same temperature, which not only significantly increases manufacturing costs, but also has the disadvantage that the fixed part of the pipes can become corroded.

In view of these points, the present invention provides a liquid lift pipe that penetrates the bottom wall of the container body with a branch passage that branches at the bottom and merges at the top, one of which is used as a level gauge, and a float is installed inside. and a small diameter part is provided at the upper end of the level gauge, and the small diameter part and the float constitute a valve mechanism,
This eliminates the above drawbacks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the air-filled heat-insulating container of the present invention applied to an electric heat-insulating pot will be described with reference to the attached drawings.

The electric heat-retaining pot shown in the drawings has a heater 2 attached to the outer peripheral surface of the lower end of the container body 1 to heat the liquid inside, and the outer periphery of the pot is surrounded by a heat insulating material 3.

The upper part of the container body 1 is provided with a lid plate 5a fitted with a gasket 4 that tightly contacts the opening edge and seals the container body. It is covered with a lid body 5.

A bellows pump 6 is housed in the cap-shaped lid 5, and by pressing the bellows pump 6 with a pusher 7, high pressure air is supplied into the container body 1 through the air supply hole 8.

On the other hand, as shown in FIG. 3, a liquid lifting pipe 9 is opened at the bottom of the container body 1 by penetrating the bottom wall 1a.
When air is pumped into the tank, the pressure causes the liquid to be pumped out through the liquid pumping pipe 9 and into the liquid filling pipe 10.
It is possible to inject more liquid.

In other words, as long as the opening 9a of the liquid pumping pipe 9 is in the liquid inside the container body, the content liquid can be pumped out, and if it opens at the lowest part of the container body, the content liquid cannot be completely discharged. can. but,
In consideration of the fact that the liquid inside the electric heat-retaining pot is heated by the heater 2, the opening 9a of the liquid lifting tube is made higher as shown in Fig. 3, so that at least some of the liquid cannot be discharged. This prevents the container body 1 from being emptied.

The liquid lift pipe 9 that penetrates the bottom wall 1a of the container body 1 extends upward along the container body 1 as shown in the drawing, and is connected to the liquid injection pipe 10 via the safety valve 10a in the event of a fall. A branch passage 11 is provided in the middle of this liquid lift pipe 9.

That is, a branch pipe 12 made of, for example, silicone rubber is connected to the lower part of the liquid lift pipe 9, so that one side becomes the main flow of the lift pipe and the other side becomes the branch passage 11. This branch passage 11 extends upward in the same way as the liquid pumping pipe.
3 to join the liquid pumping pipe. A part of the branch passage is provided with a level gauge 14 made of a transparent material such as a glass tube that allows the content liquid to be seen from outside the vessel.

Therefore, the level gauge 14 is installed so that it can be seen directly from outside the vessel, while the liquid pump 9 is placed in a position where it is not affected by the outside air as much as possible, or it is placed in a position where it is not affected by the outside air as much as possible, or it is placed on a panel that boils water and displays a heat retention indicator as shown in Fig. 2. 15
pass through a location where it will not interfere with the installation of the

In this way, in order to configure the liquid lift pipe 9 and its branch passage 11 by passing through different parts, a relatively short pipe 9b is required.
and 11a by connecting them with L-shaped connecting tubes 16 and 17 made of silicone rubber.

A ball-shaped float 18 that freely moves inside the level gauge 14 is housed to make it easy to check the liquid level. Another purpose of the float 18 is to function as a valve for the branch passage 11 and to prevent the liquid in the level gauge 14, which cools down relatively easily, from pouring out.

That is, as shown in FIG. 4, a small diameter part 19 in the form of an inner flange is provided in a part of the connecting pipe 13 so that it can be closed by a float 18.

In the illustrated example, the pipe 11a constituting the branch passage
is made smaller in diameter than the liquid lifting tube 9 so that the liquid inside is difficult to flow through.

In the air-filled heat-insulating container of the present invention, the liquid level corresponding to the level of the content liquid can be checked using the level gauge 14 in a stationary state other than when liquid is poured.

During injection, the content liquid is injected through the liquid pumping pipe, but at the same time, the water level in the level gauge also rises. When the water level inside the level gauge rises, the float housed inside also rises, and eventually comes into contact with the small diameter portion and functions as a valve, blocking the flow of liquid within the level gauge. Therefore, the liquid in the level gauge, which cools down relatively easily, is not injected all at once. However, since the upper end of the branch pipe that serves as the level gauge joins the upper part of the liquid lift pipe, there is no risk of liquid leaking outside the vessel, and the valve mechanism using the small diameter part and float is not necessarily highly accurate. It doesn't have to be.

According to the present invention, there is no need to remove the stopper that is integrated with the liquid lift pipe when replenishing hot water into the container body, and the liquid lift pipe that also serves as a conventional level gauge can be replaced with the liquid lift pipe that also serves as a level gauge. Compared to the case where the opening is made at the bottom, there is no risk that the low temperature liquid that is relatively easily cooled down in the level cage will be injected all at once at the beginning of liquid injection.

In addition, since the liquid lift pipe and the branch passage serving as the level gauge can be placed at arbitrary positions, there are no design restrictions, and the device can be excellent in terms of functionality and design.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the air-filled heat-insulating container of the present invention, in which Fig. 1 is a longitudinal sectional view with some parts omitted, and Fig. 2 is a front view showing the arrangement of the liquid pumping pipe and the branch passage. , FIG. 3 is a partially longitudinal side view schematically showing the container body, the liquid lift pipe and its branch passage, and FIG. 4 is a longitudinal sectional view showing only the upper end connection portion of the level gauge. 1... Container body, 2... Heater, 3... Insulating material, 5... Lid, 6... Bellows pump, 7...
Push body, 9... Lifting pipe, 9a... Opening, 10... Liquid injection pipe, 11... Branch passage, 12, 13... Branch pipe, 14... Level gauge, 18... Float, 19
...Small diameter section.

Claims (1)

[Scope of utility model registration request] In a heat-insulating container of a type in which pressurized air is introduced into the inside of the container body 1 to be sealed, and liquid is poured through a liquid pumping pipe that opens at the bottom of the container body, the container body 1
A liquid pumping pipe 9 is opened through the bottom wall of the liquid pumping pipe 9, and a branch passage 11 is provided in the liquid pumping pipe 9, which branches at the lower part and merges at the upper part. The level gauge 14 is made of a transparent material, and a float 18 is accommodated in the level gauge 14. A small diameter part 19 is provided at the upper end of the level gauge 14, and the small diameter part 19 and the float 18 are used to connect the valve. An air-filled heat-insulating container comprising a mechanism.