US-12623829-B2 - Vacuum heat insulating container

US12623829B2US 12623829 B2US12623829 B2US 12623829B2US-12623829-B2

Abstract

A vacuum heat insulating container that can be easily subjected to inspection work is provided. A vacuum heat insulating container ( 1 ) includes: a container main body ( 100 ) including an opening ( 40 a ) and an accommodating space ( 40 b ); and a lid body ( 101 ). The container main body ( 100 ) includes a heat insulating container body ( 40 ) including: a first outer covering member ( 41 ) which is a molded body made of a nonmetal material and has a gas barrier property and a double wall structure; a first core member ( 42 ); and a pressure sensor ( 43 ). The lid body ( 101 ) includes: a heat insulating lid body ( 50 ) including a second outer covering member ( 51 ) having a sack shape formed by a flexible film which includes a metal layer and has a gas barrier property and a second core member ( 52 ); and a window ( 61 ) by which a surface of the second outer covering member ( 51 ) is visually confirmable.

Inventors

MASAHIRO KAGIMOTO
Hideji Kawarazaki
Shinya Kojima
Masafumi Okawa
Toshiaki Hirano

Assignees

PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20211025
Priority Date: 20210326

Claims (4)

1 . A vacuum heat insulating container comprising: a container main body including an opening and an accommodating space communicating with the opening; and a lid body covering the opening of the container main body, wherein: the container main body includes a heat insulating container body including a first outer covering member that is a molded body made of a nonmetal material and has a gas barrier property and a double wall structure, a first core member accommodated in an inter-wall space of the double wall structure of the first outer covering member, a pressure sensor which is accommodated in the inter-wall space of the double wall structure of the first outer covering member and is communicable with an outside, the inter-wall space of the double wall structure of the first outer covering member being reduced in pressure, and the heat insulating container body having a rectangular solid container shape as a whole; the double wall structure of the first outer covering member is defined by an outer body having a larger volume and an inner body having a smaller volume combined with each other; the first outer covering member includes four side portions and one bottom portion; the double wall structure of the first outer covering member includes respective double wall structures of the side and bottom portions of the first outer covering member; the inter-wall space of the double wall structure of the first outer covering member includes respective inter-wall spaces of the double wall structures of the side and bottom portions of the first outer covering member; the inter-wall spaces of the double wall structures of the side and bottom portions of the first outer covering member are reduced in pressure and communicate with each other; the lid body includes a heat insulating lid body including a second outer covering member having a sack shape formed by a flexible film which includes a metal layer and has a gas barrier property, and a second core member accommodated in the second outer covering member, an inside of the second outer covering member being reduced in pressure, a visible portion by which a surface of the second outer covering member of the heat insulating lid body is visually confirmable, and a lid case accommodating the heat insulating lid body; the lid case includes an upper plate and a lower plate which sandwich the heat insulating lid body; the upper plate includes a window as the visible portion and a window cover that opens and closes the window; when the window cover is in an open state, the second outer covering member of the heat insulating lid body in the lid case is visually confirmable and touchable through the window; and the lower plate does not include the window.
2 . The vacuum heat insulating container according to claim 1 , comprising: a first gas adsorbent located in the inter-wall space of the first outer covering member of the heat insulating container body; and a second gas adsorbent located in the second outer covering member of the heat insulating lid body, wherein a life of gas adsorption ability of the second gas adsorbent is longer than a life of gas adsorption ability of the first gas adsorbent.
3 . The vacuum heat insulating container according to any one of claim 1 , wherein: the container main body further includes a protective member covering an outer surface of the heat insulating container body; and at a portion of the protective member which corresponds to the pressure sensor located at the heat insulating container body, a recess that is recessed from the other portion of the protective member is formed.
4 . The vacuum heat insulating container according to claim 2 , wherein: the container main body further includes a protective member covering an outer surface of the heat insulating container body; and at a portion of the protective member which corresponds to the pressure sensor located at the heat insulating container body, a recess that is recessed from the other portion of the protective member is formed.

Description

TECHNICAL FIELD The present disclosure relates to a vacuum heat insulating container that maintains an internal temperature for a long period of time. BACKGROUND ART A heat insulating container disclosed in PTL 1 has been known as a container that keeps contents cold. The heat insulating container of PTL 1 includes: a container which has a rectangular solid shape and includes an opening; and an upper lid that opens or closes the opening of the container. Moreover, each of the container and the upper lid has a double wall structure. A vacuum insulator having a flat plate shape is accommodated in each of six inter-wall spaces that are inter-wall spaces of the respective surfaces of the container and an inter-wall space of the upper lid. CITATION LIST Patent Literature PTL 1: Japanese Laid-Open Patent Application Publication No. 2007-126188 SUMMARY OF INVENTION Technical Problem Gas may intrude into the vacuum insulator through an outer covering member or through an adhesive interface between outer covering members. Therefore, from a long-term viewpoint, the thermal insulation performance of the vacuum insulator deteriorates over time. Moreover, the thermal insulation performance of the vacuum insulator may deteriorate when the outer covering member wears by external force applied during use. Therefore, the thermal insulation performance of the vacuum insulator needs to be inspected timely especially when the vacuum insulator is assumed to be used in a case where severe temperature management is required, such as a case of transportation of medicine. However, in the heat insulating container of PTL 1, six vacuum insulators that are independent from each other are included at six places in the container and the upper lid as described above. Therefore, these six vacuum insulators need to be individually inspected. Thus, time and labor are required for inspection work. The present disclosure was made to solve the above problems, and an object of the present disclosure is to provide a vacuum heat insulating container that can be easily subjected to inspection work. Solution to Problem A vacuum heat insulating container according to a first aspect of the present disclosure includes: a container main body including an opening and an accommodating space communicating with the opening; and a lid body covering the opening of the container main body. The container main body includes a heat insulating container body including: a first outer covering member that is a molded body made of a nonmetal material and has a gas barrier property and a double wall structure; a first core member accommodated in an inter-wall space of the first outer covering member; and a pressure sensor which is accommodated in the inter-wall space of the first outer covering member and is communicable with an outside, the inter-wall space of the first outer covering member being reduced in pressure. The lid body includes: a heat insulating lid body including a second outer covering member having a sack shape formed by a flexible film which includes a metal layer and has a gas barrier property, and a second core member accommodated in the second outer covering member, an inside of the second outer covering member being reduced in pressure; and a visible portion by which a surface of the second outer covering member of the heat insulating lid body is visually confirmable. According to this configuration, the heat insulating container body included in the container main body has the double wall structure formed by the molded body. Therefore, even the heat insulating container body having, for example, a rectangular solid shape can be formed such that the inter-wall spaces communicate with each other. Moreover, since the first outer covering member constituting the heat insulating container body is made of nonmetal, a radio wave emitted from the pressure sensor accommodated in the first outer covering member can be transmitted to an outside. Therefore, the thermal insulation performance of the heat insulating container body can be measured by, for example, a single pressure sensor. Moreover, the heat insulating lid body included in the lid body includes the second outer covering member which is formed by a flexible film including a metal layer. Therefore, when gas intrudes into the heat insulating lid body, and this deteriorates the thermal insulation performance, the surface of the second outer covering member deforms, i.e., for example, the second outer covering member swells. Then, the deformation of the second outer covering member can be visually confirmed through the visible portion. As above, in the vacuum heat insulating container according to the present disclosure, the heat insulating container body can be inspected by, for example, a single operation performed by the pressure sensor, and the heat insulating lid body can be visually inspected timely. Therefore, inspection work is easy. The vacuum heat insulating container according to a seco