EP2447635B1 - Plug member and low-temperature storage - Google Patents
Plug member and low-temperature storage Download PDFInfo
- Publication number
- EP2447635B1 EP2447635B1 EP11186986.3A EP11186986A EP2447635B1 EP 2447635 B1 EP2447635 B1 EP 2447635B1 EP 11186986 A EP11186986 A EP 11186986A EP 2447635 B1 EP2447635 B1 EP 2447635B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- external thread
- storage
- insulating
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/047—Pressure equalising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
- F25D23/025—Secondary closures
Definitions
- the present invention relates to a low-temperature storage according to the preamble of independent claim 1.
- JP 2010 025471 A Such a low-temperature storage is known from JP 2010 025471 A considered as the closest prior art for the present invention.
- the low-temperature storage In a low-temperature storage to be used for storage of frozen goods, etc., or cold preservation of biological tissues and specimens, etc., air inside the storage is cooled, thereby occasionally bringing about a negative pressure state where atmospheric pressure inside the storage is lower than the atmospheric pressure outside the storage. Since the negative pressure state inside the storage makes it difficult to open a door of the low-temperature storage, the low-temperature storage is generally provided with a pressure adjusting device to resolve the negative pressure state inside the storage (e.g., JP 2010 025471 A ).
- a pressure adjusting device to resolve the negative pressure state inside the storage
- JP 2010 025471 A a user removes a plug for closing a port for in flow of the air outside the low-temperature storage into the storage, thereby resolving the negative pressure state inside the storage.
- the user occasionally drops the plug, when removing the plug for closing the port.
- it occasionally becomes burdensome for the user to pick up the dropped plug and close the port with the plug again.
- US 4 986 502 A describes a drain plug with a threaded shank to be screwed into a threaded hole of a pressurized vessel.
- a groove or recess is formed on the outer periphery of threaded shank and extends generally, axially along and parallel to central axis of the shank.
- a low-temperature storage comprises: a heat-insulating housing including an opening face; a heat-insulating door configured to open or close the opening face; a cooling device configured to cool an article stored inside the heat-insulating housing; and a through-hole passing through a heat-insulating wall included in the heat-insulating housing from an outer side of the storage to an inner side thereof and having an internal thread formed on an inner periphery thereof.
- a plug member is configured to open or close an opening portion of the through-hole on the outer side of the storage, and includes an external thread configured to be threadedly engaged with the internal thread and a flange member configured to abut onto a face having the opening portion formed therein, by threaded engagement between the external thread and the internal thread, the external thread having a plurality of cuts formed in a portion of an outer periphery thereof, the cuts being equal in shape and provided at regular intervals in the outer periphery of the external thread, and being configured to open a part of the opening portion in a state where the flange member does not abut on the face having the opening portion formed therein, while the external thread is threadedly engaged with the internal thread.
- Fig. 1 is a perspective view illustrating the low-temperature storage 10 in a state where a heat-insulating door 21 is closed
- Fig. 2 is a perspective view illustrating the low-temperature storage 10 in a state where heat-insulating doors 21 and 22 are open.
- an X-axis direction is a side-to-side direction relative to the low-temperature storage 10
- a Y-axis direction is an up- and-down direction relative to the low-temperature storage 10
- a Z-axis direction is a fore-and-aft direction relative to the low-temperature storage 10.
- the low-temperature storage 10 is configured to store frozen goods, etc., or preserve biological tissues, etc., in an ultralow temperature range lower than or equal to -85°C, for example, and includes a heat-insulating housing 20 including an opening face at the front thereof (+Z side).
- the heat-insulating doors 21 and 22 configured to open or close the opening face at the front are provided on the opening face at the front of the heat-insulating housing 20, and a cooling device 23 configured to cool an inside of the storage is provided on the lower side (-Y side) of the heat-insulating housing 20.
- a pressure adjusting device 30 configured to resolve a negative pressure state inside the storage is provided on a side surface on the left-hand side (-X side) of the heat-insulating housing 20.
- the heat-insulating door 21 is a so-called outer door and is provided with a control panel 31 that is configured to perform setting of the temperature inside the storage, and the like.
- a handle 32 configured to open and close the heat-insulating door 21 is provided at the left edge of the heat-insulating door 21.
- a lock member 33 which is configured to fix the heat-insulating door 21 together with the handle 32 when the heat-insulating door 21 is closed, is provided on the side surface on the left-hand side of the heat-insulating housing 20.
- the heat-insulating door 22, which is configured to enhance the heat-insulating properties inside the storage, is provided inside the heat-insulating door 21 as an inner door.
- Fig. 3 is a plan view illustrating the low-temperature storage 10.
- the heat-insulating housing 20 includes a metallic inner case 40, a metallic outer case 41 provided such that the inner case 40 is covered, and a heat-insulating material 42 filled between the inner case 40 and the outer case 41 so as to enhance the heat-insulating properties, for example.
- the inner case 40 and the outer case 41 have an opening face, at the front, so that the frozen goods, etc are taken out and put in.
- the heat-insulating door 21 is a metallic door whose inside is filled with a heat-insulating material 45.
- Packing 46 which is configured to enhance airtightness inside the storage when the heat-insulating door 21 is closed, is provided at the inner periphery of the heat-insulating door 21.
- the low-temperature storage 10 becomes in a hermetically-sealed state when there is no air to enter and exit in the pressure adjusting device 30 while the heat-insulating doors 21 and 22 are closed.
- Fig. 4 is a perspective view illustrating the exploded pressure adjusting device 30 and a portion of a heat-insulating wall of the heat-insulating housing 20 on which the pressure adjusting device 30 is mounted.
- a through-hole 50 which passes through the heat-insulating wall from the outside of the storage to the inside thereof, is formed in the heat-insulating wall of the heat-insulating housing 20 on which the pressure adjusting device 30 is mounted.
- the pressure adjusting device 30 is inserted into the through-hole 50 and includes members 60 and 61 configured to form a path for the air outside the storage to flow into the storage, and a plug member 62 configured to open or close the path for inflow of the air.
- the member 60 is a flanged tubular member to be inserted into the through-hole 50 from the inside of the storage, and includes a cylindrical member 70 with an external thread formed on the outer periphery thereof and a flange member 71 that is integrally formed on one end of the cylindrical member 70.
- the member 61 is a flanged tubular member to be inserted into the through-hole 50 from the outside of the storage, and includes a cylindrical member 72 and a flange member 73 that is integrally formed on one end of the cylindrical member 72. On the inner periphery of the cylindrical member 72, such an internal thread is formed as to be threadedly engaged with the external thread formed on the cylindrical member 70.
- Fig. 5 is a diagram illustrating a state where the members 60 and 61 are actually mounted onto the heat-insulating wall of the heat-insulating housing 20.
- the flange member 71 abuts onto the wall surface of the inner case 40 from the inner side of the storage
- the flange member 73 abuts onto the wall surface of the outer case 41 from the outer side of the storage.
- the flange members 71 and 73 are joined to each other in such a manner as to press the heat-insulating wall of the heat-insulating housing 20 from both the inner side and the outer side of the storage.
- a through-hole 80 which is configured to pass through between the inner side of the storage and the outer side thereof, is formed inside the cylindrical members 70 and 72 as the path for inflow of the air.
- the plug member 62 is a member configured to open or close an opening portion 81 of the through-hole 80 on the outer side of the storage, and includes an external thread 75, a knob 76, and packing 77 as shown in Fig. 6 .
- the knob 76 and the packing 77 correspond to a flange member.
- Fig. 6 is a perspective view illustrating the plug member 62
- Fig. 7 is a side view illustrating the plug member 62.
- the external thread 75 is a column thread configured to be threadedly engaged with the internal thread of the cylindrical member 72.
- a plurality of cuts 100a to 100d are formed along the direction of the threaded engagement of the external thread 75.
- a length of the cuts 100a to 100d is substantially equal to a length d of the external thread 75 shown in Fig. 7 . Therefore, the cuts 100a to 100d are formed over the entire length of the external thread 75 in the threaded engagement direction.
- the external thread 75 is formed such that the cuts 100a to 100d, which are equal in shape, are provided at regular intervals in the outer periphery of the external thread 75.
- the knob 76 is formed at one end of the external thread 75 integrally therewith, and is in a columnar shape with a diameter greater than that of the external thread 75, for example.
- the packing 77 is pasted to a face of the knob 76 on the external thread 75 side, along the outer circumference of the external thread 75.
- Fig. 8 is a cross-sectional view illustrating the pressure adjusting device 30 in a state where the through-hole 80 is closed (cross-sectional view of the cross section along a line A-B of Fig. 3 , when viewed in the -Z direction).
- the cut 100a out of the cuts 100a to 100d in the external thread 75 is illustrated for easy understanding of cross-sectional structure of the pressure adjusting device 30.
- Fig. 9 is a cross-sectional view of the pressure adjusting device 30 in a state where the through-hole 80 is open.
- Fig. 9 similarly to Fig. 8 , is a cross-sectional view of the cross section along the line A-B of Fig. 3 , when viewed in the -Z direction.
- the plug member 62 is rotated to loosen the external thread 75, the packing 77 is brought to a state where it does not abut on the face around the opening of the flange member 73.
- a part of the external thread 75 is threadedly engaged with the internal thread of the cylindrical member 72.
- the low-temperature storage 10 Since the external thread 75 of the plug member 62 has the cuts 100a to 100d formed therein, the negative pressure state inside the storage is resolved without the plug member 62 being removed, in an embodiment of the present invention. As a result, the possibility is decreased that the plug member 62 is dropped when the negative pressure state is to be resolved, thereby being able to reduce the burden of the user. Furthermore, for example, in a case where the user has the low-temperature storage capable of resolving the negative pressure using the plug member without cuts, if only the plug member 62 with the cuts is newly provided, a similar effect to that in an embodiment of the present invention can be achieved without any special work, etc.
- an external thread with the cuts provided in a cylindrical member can also be used.
- the external thread with the cuts provided in a cylindrical member might have component strength, as the external thread, lowered since the inside of the cylindrical member is hollow.
- the column member is used instead of the cylindrical member, thereby being able to enhance the component strength of the external thread 75.
- the cuts in the external thread 75 are formed only in a portion of the external thread 75, the similar effect can be achieved to that in an embodiment of the present invention.
- the cuts are each formed only in a part from a tip edge of the external thread 75 (the edge on the side opposite to that of the knob 76)
- the cut 100a is formed over the entire length of the external thread 75 in the direction of the threaded engagement. This enables the user to securely resolve the negative pressure state simply by turning the knob 76 slightly to loosen the external thread 75.
- the external thread 75 has four cuts 100a to 100d formed therein.
- the negative pressure state can speedily be resolved as compared with a case of the external thread having only one cut, for example.
- the through-hole configured to communicate between the inside and the outside of the storage can be formed in the heat-insulating door 21 at the front of the low-temperature storage 10.
- the heat-insulating door of a common low-temperature storage is of a dual structure (structure including the inner and outer doors) similarly to that in an embodiment of the present invention. This makes the structure of the low-temperature storage complicated when the through-hole is formed at the front.
- the through-hole 80 is formed in the heat-insulating wall on a side surface of the heat-insulating housing 20, thereby being able to make the structure of the low-temperature storage 10 a simple structure with the convenience for the user being secured.
Description
- The present invention relates to a low-temperature storage according to the preamble of independent claim 1.
- Such a low-temperature storage is known from
JP 2010 025471 A - In a low-temperature storage to be used for storage of frozen goods, etc., or cold preservation of biological tissues and specimens, etc., air inside the storage is cooled, thereby occasionally bringing about a negative pressure state where atmospheric pressure inside the storage is lower than the atmospheric pressure outside the storage. Since the negative pressure state inside the storage makes it difficult to open a door of the low-temperature storage, the low-temperature storage is generally provided with a pressure adjusting device to resolve the negative pressure state inside the storage (e.g.,
JP 2010 025471 A - In
JP 2010 025471 A - Moreover,
US 4 986 502 A describes a drain plug with a threaded shank to be screwed into a threaded hole of a pressurized vessel. A groove or recess is formed on the outer periphery of threaded shank and extends generally, axially along and parallel to central axis of the shank. Upon partial unscrewing of the plug from within the hole, the pressurized gas or fluid will flow outwardly through the groove or recess, thereby alerting the operator of the residual pressure within the pressurized system. - A low-temperature storage according to the present invention comprises: a heat-insulating housing including an opening face; a heat-insulating door configured to open or close the opening face; a cooling device configured to cool an article stored inside the heat-insulating housing; and a through-hole passing through a heat-insulating wall included in the heat-insulating housing from an outer side of the storage to an inner side thereof and having an internal thread formed on an inner periphery thereof. A plug member is configured to open or close an opening portion of the through-hole on the outer side of the storage, and includes an external thread configured to be threadedly engaged with the internal thread and a flange member configured to abut onto a face having the opening portion formed therein, by threaded engagement between the external thread and the internal thread, the external thread having a plurality of cuts formed in a portion of an outer periphery thereof, the cuts being equal in shape and provided at regular intervals in the outer periphery of the external thread, and being configured to open a part of the opening portion in a state where the flange member does not abut on the face having the opening portion formed therein, while the external thread is threadedly engaged with the internal thread.
- Other features of the present invention will become apparent from descriptions of this specification and of the accompanying drawings.
- For more thorough understanding of the present invention and advantages thereof, the following description should be read in conjunction with the accompanying drawings, in which:
-
Fig. 1 is a perspective view illustrating a low-temperature storage 10 according to one embodiment of the present invention; -
Fig. 2 is a perspective view illustrating a low-temperature storage 10 in a state where heat-insulatingdoors -
Fig. 3 is a plan view illustrating a low-temperature storage 10; -
Fig. 4 is a diagram illustrating an explodedpressure adjusting device 30 and a portion of a heat-insulating wall of a heat-insulatinghousing 20; -
Fig. 5 is a diagram illustrating a state wheremembers housing 20; -
Fig. 6 is a perspective view illustrating aplug member 62; -
Fig. 7 is a side view illustrating aplug member 62; -
Fig. 8 is a cross-sectional illustrating apressure adjusting device 30 in a state where a through-hole 80 is closed; and -
Fig. 9 is a cross-sectional view illustrating apressure adjusting device 30 in a state where a through-hole 80 is open. - At least the following details will become apparent from descriptions of this specification and of the accompanying drawings.
- An outline will now be described of a low-
temperature storage 10 according to one embodiment of the present invention with reference toFigs. 1 and2 .Fig. 1 is a perspective view illustrating the low-temperature storage 10 in a state where a heat-insulatingdoor 21 is closed, andFig. 2 is a perspective view illustrating the low-temperature storage 10 in a state where heat-insulatingdoors temperature storage 10, a Y-axis direction is an up- and-down direction relative to the low-temperature storage 10, and a Z-axis direction is a fore-and-aft direction relative to the low-temperature storage 10. - The low-
temperature storage 10 is configured to store frozen goods, etc., or preserve biological tissues, etc., in an ultralow temperature range lower than or equal to -85°C, for example, and includes a heat-insulatinghousing 20 including an opening face at the front thereof (+Z side). - The heat-insulating
doors housing 20, and acooling device 23 configured to cool an inside of the storage is provided on the lower side (-Y side) of the heat-insulatinghousing 20. Apressure adjusting device 30 configured to resolve a negative pressure state inside the storage is provided on a side surface on the left-hand side (-X side) of the heat-insulatinghousing 20. - The heat-insulating
door 21 is a so-called outer door and is provided with acontrol panel 31 that is configured to perform setting of the temperature inside the storage, and the like. Ahandle 32 configured to open and close the heat-insulatingdoor 21 is provided at the left edge of the heat-insulatingdoor 21. Alock member 33, which is configured to fix the heat-insulatingdoor 21 together with thehandle 32 when the heat-insulatingdoor 21 is closed, is provided on the side surface on the left-hand side of the heat-insulatinghousing 20. The heat-insulatingdoor 22, which is configured to enhance the heat-insulating properties inside the storage, is provided inside the heat-insulatingdoor 21 as an inner door. -
Fig. 3 is a plan view illustrating the low-temperature storage 10. The heat-insulatinghousing 20 includes a metallicinner case 40, a metallicouter case 41 provided such that theinner case 40 is covered, and a heat-insulatingmaterial 42 filled between theinner case 40 and theouter case 41 so as to enhance the heat-insulating properties, for example. Theinner case 40 and theouter case 41 have an opening face, at the front, so that the frozen goods, etc are taken out and put in. - The heat-insulating
door 21 is a metallic door whose inside is filled with a heat-insulatingmaterial 45.Packing 46, which is configured to enhance airtightness inside the storage when the heat-insulatingdoor 21 is closed, is provided at the inner periphery of the heat-insulatingdoor 21. The low-temperature storage 10 becomes in a hermetically-sealed state when there is no air to enter and exit in thepressure adjusting device 30 while the heat-insulatingdoors - The
pressure adjusting device 30 will be described in detail with reference toFig. 4. Fig. 4 is a perspective view illustrating the explodedpressure adjusting device 30 and a portion of a heat-insulating wall of the heat-insulatinghousing 20 on which thepressure adjusting device 30 is mounted. - A through-
hole 50, which passes through the heat-insulating wall from the outside of the storage to the inside thereof, is formed in the heat-insulating wall of the heat-insulatinghousing 20 on which thepressure adjusting device 30 is mounted. Thepressure adjusting device 30 is inserted into the through-hole 50 and includesmembers plug member 62 configured to open or close the path for inflow of the air. - The
member 60 is a flanged tubular member to be inserted into the through-hole 50 from the inside of the storage, and includes acylindrical member 70 with an external thread formed on the outer periphery thereof and aflange member 71 that is integrally formed on one end of thecylindrical member 70. - The
member 61 is a flanged tubular member to be inserted into the through-hole 50 from the outside of the storage, and includes acylindrical member 72 and aflange member 73 that is integrally formed on one end of thecylindrical member 72. On the inner periphery of thecylindrical member 72, such an internal thread is formed as to be threadedly engaged with the external thread formed on thecylindrical member 70. -
Fig. 5 is a diagram illustrating a state where themembers housing 20. By threaded engagement between the external thread of thecylindrical member 70 and the internal thread of thecylindrical member 72, theflange member 71 abuts onto the wall surface of theinner case 40 from the inner side of the storage, and theflange member 73 abuts onto the wall surface of theouter case 41 from the outer side of the storage. Thus, theflange members housing 20 from both the inner side and the outer side of the storage. A through-hole 80, which is configured to pass through between the inner side of the storage and the outer side thereof, is formed inside thecylindrical members - The
plug member 62 is a member configured to open or close anopening portion 81 of the through-hole 80 on the outer side of the storage, and includes anexternal thread 75, aknob 76, and packing 77 as shown inFig. 6 . Theknob 76 and thepacking 77 correspond to a flange member.Fig. 6 is a perspective view illustrating theplug member 62 andFig. 7 is a side view illustrating theplug member 62. - As shown in
Fig. 4 , theexternal thread 75 is a column thread configured to be threadedly engaged with the internal thread of thecylindrical member 72. On the outer periphery of theexternal thread 75, a plurality ofcuts 100a to 100d are formed along the direction of the threaded engagement of theexternal thread 75. A length of thecuts 100a to 100d is substantially equal to a length d of theexternal thread 75 shown inFig. 7 . Therefore, thecuts 100a to 100d are formed over the entire length of theexternal thread 75 in the threaded engagement direction. In an embodiment of the present invention, theexternal thread 75 is formed such that thecuts 100a to 100d, which are equal in shape, are provided at regular intervals in the outer periphery of theexternal thread 75. - The
knob 76 is formed at one end of theexternal thread 75 integrally therewith, and is in a columnar shape with a diameter greater than that of theexternal thread 75, for example. The packing 77 is pasted to a face of theknob 76 on theexternal thread 75 side, along the outer circumference of theexternal thread 75. - With the
external thread 75 being threadedly-engaged with and screwed into the internal thread of thecylindrical member 72, the packing 77 abuts onto a face around an opening of the flange member 73 (the face having the openingportion 81 formed therein). Therefore, as shown inFig. 8 , theplug member 62 securely closes the through-hole 80, which prevents the cool air from leaking from the inside of the storage to the outside thereof.Fig. 8 is a cross-sectional view illustrating thepressure adjusting device 30 in a state where the through-hole 80 is closed (cross-sectional view of the cross section along a line A-B ofFig. 3 , when viewed in the -Z direction). Herein, only thecut 100a out of thecuts 100a to 100d in theexternal thread 75 is illustrated for easy understanding of cross-sectional structure of thepressure adjusting device 30. -
Fig. 9 is a cross-sectional view of thepressure adjusting device 30 in a state where the through-hole 80 is open.Fig. 9 , similarly toFig. 8 , is a cross-sectional view of the cross section along the line A-B ofFig. 3 , when viewed in the -Z direction. When theplug member 62 is rotated to loosen theexternal thread 75, the packing 77 is brought to a state where it does not abut on the face around the opening of theflange member 73. In a state where theexternal thread 75 is loosened, a part of theexternal thread 75 is threadedly engaged with the internal thread of thecylindrical member 72. In such a state, there is nothing blocking a space between thecut 100a and a part of the openingportion 81, for example. Thus, for example, when the inside of the storage is in a negative pressure state, loosening of theexternal thread 75 enables an inflow of the air outside the storage into the storage. That is to say, the negative pressure state can be resolved by loosening theexternal thread 75. - Hereinabove, a description has been given of the low-
temperature storage 10 according to an embodiment of the present invention. Since theexternal thread 75 of theplug member 62 has thecuts 100a to 100d formed therein, the negative pressure state inside the storage is resolved without theplug member 62 being removed, in an embodiment of the present invention. As a result, the possibility is decreased that theplug member 62 is dropped when the negative pressure state is to be resolved, thereby being able to reduce the burden of the user. Furthermore, for example, in a case where the user has the low-temperature storage capable of resolving the negative pressure using the plug member without cuts, if only theplug member 62 with the cuts is newly provided, a similar effect to that in an embodiment of the present invention can be achieved without any special work, etc. - For example, in place of the
external thread 75, an external thread with the cuts provided in a cylindrical member can also be used. The external thread with the cuts provided in a cylindrical member, however, might have component strength, as the external thread, lowered since the inside of the cylindrical member is hollow. In a case of theexternal thread 75, the column member is used instead of the cylindrical member, thereby being able to enhance the component strength of theexternal thread 75. - For example, even if the cuts in the
external thread 75 are formed only in a portion of theexternal thread 75, the similar effect can be achieved to that in an embodiment of the present invention. However, in a case where the cuts are each formed only in a part from a tip edge of the external thread 75 (the edge on the side opposite to that of the knob 76), for example, there is a possibility that the user may turn theknob 76 too much, in order to get communication between the inside and the outside of the storage, thereby removing theplug member 62. In the case of theexternal thread 75, thecut 100a is formed over the entire length of theexternal thread 75 in the direction of the threaded engagement. This enables the user to securely resolve the negative pressure state simply by turning theknob 76 slightly to loosen theexternal thread 75. - The
external thread 75 has fourcuts 100a to 100d formed therein. Thus, the negative pressure state can speedily be resolved as compared with a case of the external thread having only one cut, for example. - For example, the through-hole configured to communicate between the inside and the outside of the storage can be formed in the heat-insulating
door 21 at the front of the low-temperature storage 10. The heat-insulating door of a common low-temperature storage, however, is of a dual structure (structure including the inner and outer doors) similarly to that in an embodiment of the present invention. This makes the structure of the low-temperature storage complicated when the through-hole is formed at the front. In the low-temperature storage 10, the through-hole 80 is formed in the heat-insulating wall on a side surface of the heat-insulatinghousing 20, thereby being able to make the structure of the low-temperature storage 10 a simple structure with the convenience for the user being secured. - The above embodiments of the present invention are simply for facilitating the understanding of the present invention and are not in any way to be construed as limiting the present invention, the scope of which is defined by the claims.
Claims (2)
- A low-temperature storage (10) comprising:a heat-insulating housing (20) including an opening face;a heat-insulating door (21, 22) configured to open or close the opening face;a cooling device (23) configured to cool an article stored inside the heat-insulating housing (20);a through-hole (80) passing through a heat-insulating wall included in the heat-insulating housing (20) from an outer side of the storage (10) to an inner side thereof and having an internal thread formed on an inner periphery thereof; anda plug member (62) configured to open or close an opening portion (81) of the through-hole (80) on the outer side of the storage (10) and including an external thread (75) configured to be threadedly engaged with the internal thread and a flange member (76, 77) configured to abut onto a face having the opening portion (81) formed therein, by threaded engagement between the external thread (75) and the internal thread,characterized in thatthe external thread (75) has a plurality of cuts (100a, 100b, 100c, 100d) formed in a portion of an outer periphery thereof, the cuts (100a, 100b, 100c, 100d) being equal in shape and provided at regular intervals in the outer periphery of the external thread (75), and being configured to open a part of the opening portion (81) in a state where the flange member (76, 77) does not abut on the face having the opening portion (81) formed therein, while the external thread (75) is threadedly engaged with the internal thread.
- The low-temperature storage (10) of claim 1,
wherein the through-hole (80) is formed on the heat-insulating wall on a side surface of the heat-insulating housing (20).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010242447A JP5671675B2 (en) | 2010-10-28 | 2010-10-28 | Plug member, low temperature storage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2447635A2 EP2447635A2 (en) | 2012-05-02 |
EP2447635A3 EP2447635A3 (en) | 2018-05-30 |
EP2447635B1 true EP2447635B1 (en) | 2020-06-17 |
Family
ID=44862739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11186986.3A Active EP2447635B1 (en) | 2010-10-28 | 2011-10-27 | Plug member and low-temperature storage |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120103992A1 (en) |
EP (1) | EP2447635B1 (en) |
JP (1) | JP5671675B2 (en) |
KR (1) | KR101396719B1 (en) |
CN (1) | CN102466384B (en) |
Families Citing this family (7)
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US9322589B2 (en) * | 2013-07-09 | 2016-04-26 | Eppendorf Ag | Unified freezer chamber venting with door handle |
CN103697649B (en) * | 2013-12-24 | 2016-03-09 | 海信容声(广东)冰箱有限公司 | A kind of temperature-changing chamber has the refrigerator of nitrogen preservation function |
KR101598443B1 (en) | 2015-02-13 | 2016-03-14 | 김만현 | Seat cover for vehicle, manufacturing method and device thereof |
JP6603397B2 (en) | 2016-03-11 | 2019-11-06 | Phcホールディングス株式会社 | Ultra-low temperature freezer |
CN110715499B (en) * | 2018-07-11 | 2020-08-28 | 海尔智家股份有限公司 | Refrigerator with a door |
WO2021124890A1 (en) * | 2019-12-18 | 2021-06-24 | Phcホールディングス株式会社 | Refrigeration device |
CN117469894B (en) * | 2023-12-26 | 2024-03-08 | 珠海格力电器股份有限公司 | Air pressure balancing device, low-temperature preservation box and control method thereof |
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JPS6024758U (en) * | 1983-07-22 | 1985-02-20 | 日本酸素株式会社 | liquid container stopper |
JPS6086240U (en) * | 1983-11-21 | 1985-06-13 | タイガー魔法瓶株式会社 | liquid container |
US4685584A (en) * | 1986-09-29 | 1987-08-11 | Stant Inc. | Vented fuel cap with bump and grade seal |
US4787529A (en) * | 1987-06-16 | 1988-11-29 | Stant Inc. | Vapor-liquid control fuel cap |
US4986502A (en) * | 1989-12-04 | 1991-01-22 | Ceroke Clarence J | Safety drain plug |
US5183173A (en) * | 1991-07-29 | 1993-02-02 | Epicor Industries, Inc. | Auto venting fuel cap |
JP2604293B2 (en) * | 1991-11-20 | 1997-04-30 | 三洋電機株式会社 | Cold storage |
US5368181A (en) * | 1993-03-12 | 1994-11-29 | Myers; Alan | Captured drain plug or vent |
US5794806A (en) * | 1994-05-06 | 1998-08-18 | Stant Manufacturing Inc. | Quick-on fuel cap |
JPH08277938A (en) * | 1995-04-06 | 1996-10-22 | Daihatsu Motor Co Ltd | Sealing structure of oil filler cap |
CN2253705Y (en) * | 1996-02-01 | 1997-05-07 | 李建民 | Quick connector for tyre inflation |
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SI9600364A (en) * | 1996-12-11 | 1998-06-30 | Gorenje Gospodinjski Aparati D.D. | Device for pressure equalisation, particularly for freezers |
JP2000039250A (en) * | 1998-07-17 | 2000-02-08 | Sanyo Electric Co Ltd | Cooling storage |
IT1305711B1 (en) * | 1998-12-22 | 2001-05-15 | Merloni Elettrodomestici Spa | PRESSURE BALANCING VALVE WITHIN COLD REFRIGERATION UNITS EQUIPPED WITH PROTECTION FROM LOW TEMPERATURES |
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DE10034761A1 (en) * | 2000-03-31 | 2002-01-31 | Heinrich Reutter | Sealing cap, e.g. for vehicle radiator; has valve arrangement with single valve body to open or shut flow connections according to three threshold levels of radiator inner pressure |
CN2574929Y (en) * | 2002-09-28 | 2003-09-24 | 宏竹实业股份有限公司 | Multifunction sunshade |
JP4118785B2 (en) * | 2003-10-31 | 2008-07-16 | サーパス工業株式会社 | Connector for liquid delivery from the tank |
JP2005233532A (en) * | 2004-02-20 | 2005-09-02 | Yasutaka Nakada | Professional-use refrigerator/freezer, container for storage and cold storage warehouse |
US20050205607A1 (en) * | 2004-03-22 | 2005-09-22 | Valentin Hierzer | Child-resistant flip-top closure |
JP5416374B2 (en) * | 2008-07-22 | 2014-02-12 | パナソニックヘルスケア株式会社 | Internal pressure regulator for low temperature storage |
CN201353988Y (en) * | 2009-02-20 | 2009-12-02 | 句容益柯赛橡胶制品有限公司 | Spinning air cap |
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2010
- 2010-10-28 JP JP2010242447A patent/JP5671675B2/en active Active
-
2011
- 2011-09-28 KR KR1020110098001A patent/KR101396719B1/en active IP Right Grant
- 2011-10-27 EP EP11186986.3A patent/EP2447635B1/en active Active
- 2011-10-28 CN CN201110332932.2A patent/CN102466384B/en active Active
- 2011-10-28 US US13/283,814 patent/US20120103992A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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EP2447635A3 (en) | 2018-05-30 |
JP2012093055A (en) | 2012-05-17 |
CN102466384B (en) | 2014-09-17 |
KR20120044887A (en) | 2012-05-08 |
US20120103992A1 (en) | 2012-05-03 |
CN102466384A (en) | 2012-05-23 |
KR101396719B1 (en) | 2014-05-19 |
EP2447635A2 (en) | 2012-05-02 |
JP5671675B2 (en) | 2015-02-18 |
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