JP5839669B2 - Liquefied gas container - Google Patents

Description

  The present invention relates to a liquefied gas container that is filled with liquefied gas, evaporates by receiving vaporization heat supplied from the container wall surface, and takes out gas generated by the evaporation.

  For example, liquefied gas containers filled with liquefied gas such as LP gas (propane gas) are widely used. This liquefied gas container has a structure in which the liquefied gas is filled inside, evaporates upon receiving the supply of latent heat of vaporization from the surface of the container, and the gas generated by the evaporation is taken out of the container and consumed. Yes.

  1 and 2 are longitudinal sectional views showing the structure of a conventional LP gas container. This LP gas container is a container designed to be filled with 50 kg of LP gas. FIG. 1 and FIG. 2 show that LP gas containers are filled with specified LP gas amounts of 100% (50 kg) and 30% (15 kg), respectively. The state where the gas is taken out from the container and consumed is shown.

  The LP gas container 10A is a pressure container having a strength sufficient to withstand the high pressure because the inside of the LP gas container 10A becomes high pressure as the filled LP gas 50 is evaporated.

  This LP gas container 10A has a celestial mirror 20 that covers the top, a ground mirror 30 that covers the bottom, and a body 40 that connects the celestial mirror 20 and the ground mirror 30 and surrounds the surroundings. A container valve 21 is attached to the celestial mirror 20. The container valve 21 is an outlet for LP gas filled in the container, but is also used as a gas inlet for injecting LP gas into the container.

  Further, a skirt 31 for stably standing the LP gas container 10A is fixed to the geoscope 30 of the LP gas container 10A.

  The LP gas filled in the LP gas container 10A is taken out and consumed as indicated by an arrow B by opening the container valve 21. At this time, the LP gas filled in the LP gas container 10A evaporates with boiling. In order to continuously consume LP gas, it is necessary to continue evaporation, and for this purpose, it is necessary to supply the latent heat of vaporization necessary for evaporation from the wall surface of the container as indicated by an arrow A. Here, the amount of heat supplied to the LP gas through the vessel wall surface is determined by the difference between the outside air temperature and the LP gas temperature, the area of the portion of the vessel wall surface where the liquid LP gas 50 is in contact, and the like. .

  In general usage, it is necessary to maintain the gas pressure in the container so that it does not fall below 0.07 MPa. However, when the remaining amount of LP gas in the container decreases, the contact area between the liquid in the container and the container wall surface Therefore, the supply of latent heat of vaporization from the container wall surface decreases, and the gas pressure tends to decrease. For this reason, it is common to design the number of installations and the like so that a necessary gas pressure can be obtained under adverse conditions of the residual gas amount of about 30% shown in FIG.

  However, under severe conditions where the outside air temperature is low and the amount of gas consumed per unit time is large, it is difficult to maintain the necessary gas pressure, especially when the residual gas amount decreases.

  FIG. 3 is a view showing the conventional LP gas container shown in FIGS. 1 and 2 in a state where gas consumption is stopped.

  When the gas in the LP gas container 10A is consumed, the heat is taken away as latent heat of vaporization and the liquid temperature decreases. Therefore, when the gas consumption is stopped, the liquid temperature is increased, that is, the gas consumption is stopped when the gas is used intermittently. It is also an important function as a container to store the amount of heat as sensible heat during the period.

  In this LP gas container 10A, as shown in FIG. 3, heat is supplied from the outer surface of the container where the liquid is in contact with the temperature difference between the outside air temperature and the liquid temperature. However, at the time of supplying this heat, the inside is not boiling, and a large amount of latent heat of vaporization is taken away when the gas is consumed. As a result, ice is often attached to the outer surface of the container, which is also affected by the ice. The rise in liquid temperature, that is, the accumulation of heat as sensible heat, is gradual.

  Here, Patent Documents 1 and 2 disclose that a bypass path that passes through the outside of the container is formed, heat transfer fins are provided in the bypass path, and heat of the outside air is supplied to the liquefied gas that passes therethrough. .

  Patent Documents 3 and 4 disclose that a foam or a capillary is placed inside the gas and the contact area between the liquefied gas and the container wall surface is increased by utilizing a capillary phenomenon.

JP 2000-88192 A Japanese Patent Laid-Open No. 2002-2296 JP 11-63394 A Japanese Utility Model Publication No. 4-134997

  The proposal for forming the bypass path disclosed in Patent Documents 1 and 2 is applicable to a fixed installation type bulk storage tank, but in the case of a portable gas container such as an LP gas container, the bypass path is installed. Is difficult. In particular, in the case of an LP gas container that has been used in the past as shown in FIGS. 1 to 3, only one place is provided with a gas injection / outlet at the top, and the LP gas container It is impossible to install a bypass with compatibility.

  Moreover, the proposal which arrange | positions a foam and a hair-like body disclosed by patent document 3, 4 inside a gas container cannot be applied to containers, such as a LP gas container. In the case of an LP gas container, the container is manufactured through a welding process. For this reason, it is necessary to perform annealing by heating the container to a high temperature and cooling it. Therefore, only a material having heat resistance sufficient to withstand the annealing can be arranged inside the container. Further, even a material that can withstand annealing needs to be durable enough to withstand long-term use thereafter.

  In view of the above circumstances, an object of the present invention is to provide a liquefied gas container that can take in latent heat of vaporization with high efficiency while maintaining compatibility with a conventional container.

The liquefied gas container of the present invention that achieves the above object is a liquefied gas container that is filled with a liquefied gas, evaporates by receiving supply of vaporization heat from the container wall surface, and takes out the gas generated by the evaporation.
An exterior container that has a celestial mirror that covers the top and is formed with a container valve, a ground mirror that covers the bottom, and a trunk that connects the celestial mirror and the ground mirror to surround it, and is filled with liquefied gas. When,
A space is provided between the top and the body, with a space between the top and the top plate on which the first flow path that is open and is always opened , separating the interior of the outer container up and down, and facing the body. And a side plate whose upper part is connected to the periphery of the top plate, and has a second flow path that opens at the bottom inside the outer container and is always open. The first region between the first region excluding the first region and the first region including both the sandwiched space and the space sandwiched between the side plate and the body facing the side plate is the first. A partition wall partitioned into a second region connected by the second flow channel and the second flow channel ,
The second flow path is wider than the first flow path, and the first flow path includes a second area and a first area when the gas pressure in the first area decreases. The second flow path is a flow path for causing the liquefied gas in the second region to flow out in the liquid state due to the differential pressure. To do.

  Here, in the liquefied gas container of the present invention, the partition wall has a ground plate on which the second flow path is formed, and the interior of the exterior container is vertically separated with a gap between the ground mirror and the above It is preferable that the interior plate is disposed inside the exterior container in which the side plate makes a round along the peripheral wall, the upper part is connected to the top plate over the entire circumference, and the lower part is connected to the base plate over the entire circumference.

  According to the liquefied gas container of the present invention, when the gas is taken out from the container and the gas pressure in the first region is reduced, the gas liquid flows out from the second flow path to the first region. The liquid level rises. For this reason, the latent heat of vaporization is efficiently taken in through the wall surface of the outer container, and the vaporization of the gas liquid is promoted.

It is the longitudinal cross-sectional view which showed the structure of the conventional LP gas container. It is the longitudinal cross-sectional view which showed the structure of the conventional LP gas container. It is the conventional LP gas container shown in FIG. 1, FIG. 2, and the figure which showed the state which stopped gas consumption. It is a longitudinal cross-sectional view of the LP gas container as 1st Embodiment of the liquefied gas container of this invention. It is a cross-sectional view of the LP gas container as the first embodiment of the liquefied gas container of the present invention. It is the figure which showed the behavior at the time of gas consumption in the LP gas container shown in FIG. It is the figure which showed the behavior at the time of gas consumption in the LP gas container shown in FIG. It is the figure which showed the state which stopped gas consumption in the LP gas container shown in FIG. It is the figure which showed the temperature change of the outer wall surface of an exterior container of the LP gas container of 1st Embodiment demonstrated with reference to FIGS. It is the figure which showed another experimental data of the temperature change of the outer wall surface of the LP gas container of 1st Embodiment. It is a longitudinal cross-sectional view of the LP gas container as 2nd Embodiment of the liquefied gas container of this invention. It is a cross-sectional view of the LP gas container as 2nd Embodiment of the liquefied gas container of this invention. It is a longitudinal cross-sectional view of the LP gas container as 3rd Embodiment of the liquefied gas container of this invention. It is an enlarged view of the part of circle R of the longitudinal section of the 3rd embodiment shown in FIG.

  Embodiments of the present invention will be described below.

  4 and 5 are a longitudinal sectional view and a transverse sectional view, respectively, of the LP gas container as the first embodiment of the liquefied gas container of the present invention.

  In FIGS. 4 and 5 and each figure after FIG. 6 to be described later, the components corresponding to the components of the conventional LP gas container shown in FIGS. The same reference numerals as those attached are used.

  An LP gas container 10B according to the first embodiment shown in FIG. 4 includes an outer container 10 composed of a celestial mirror 20, a ground mirror 30, and a body 40, and a celestial mirror 70 and a geoscope disposed inside the outer container 10. 80 and an interior container 60 composed of the body 90.

  The celestial mirror 20, the ground mirror 30, and the fuselage 40 constituting the outer container 10 have the same configuration as the celestial mirror 20, the ground mirror 30, and the fuselage 40 of the conventional LP gas container 10A shown in FIGS. Is. That is, the celestial mirror 20 covers the top, and a container valve 21 is attached to the celestial mirror 20. The ground mirror 30 covers the bottom. Furthermore, the fuselage 40 connects the celestial mirror 20 and the ground mirror 30 and surrounds the periphery. The exterior container 10 including the celestial mirror 20, the ground mirror 30, and the body 40 is filled with LP gas.

  In addition, the celestial mirror 70 constituting the interior container 60 disposed inside the exterior container 10 is a plate-like shape that divides the interior of the exterior container 10 vertically with a space between the exterior container 10 and the celestial mirror 20. It is a member. In the present embodiment, the celestial mirror 70 of the interior container 60 has a curved shape that swells upward in a shape similar to the bulge of the celestial mirror 20 of the exterior container 10, and the first flow path that penetrates through the top portion thereof. (In this embodiment, a 1 mmφ round hole) 71 is formed. Although the details will be described later, the first flow path 71 is a flow path for allowing the gas generated by the evaporation of the LP gas in the interior container 60 to flow out. In the present embodiment, the ground mirror 80 of the interior container 60 is located at the bottom inside the exterior container 10 and extends along the ground mirror 30 with a space between the ground mirror 30 and the exterior container 10. A member that separates the interior of the exterior container 10 from top to bottom. In the present embodiment, the ground mirror 80 of the interior container 60 has a curved shape that swells downward in a similar shape to the bulge of the ground mirror 30 of the exterior container 10, and the top of the curved surface (swells most downward). A second flow path (in this embodiment, a 2 mmφ round hole) 81 is formed at the location.

  As will be described later in detail, the second flow path 81 is a flow path for allowing the LP gas in the interior container 60 to flow out as a liquid.

  Further, the body 90 of the inner container 60 is a member that is spaced from the body 40 of the outer container 10 so as to face the peripheral surface of the inner container 60 and that the upper part is connected to the periphery of the celestial mirror 70 of the inner container 60. is there. In some embodiments described later, there is an embodiment in which a member corresponding to the ground mirror 80 of the interior container 60 in the present embodiment does not exist, but in this embodiment, the body 90 of the interior container 60 is the body 40 of the exterior container 10. The upper part is connected to the celestial mirror 70 of the interior container 60 over the entire circumference, and the lower part is connected to the ground mirror 80 of the interior container 60 over the entire circumference. The inner container 60 is connected to the outer container 10 by a support member 91 shown in FIG. 5, and the inner container 60 is fixed to a fixed position in the outer container 10 by being supported by the support member 91. ing.

  The interior container 60 composed of the celestial mirror 70, the ground mirror 80, and the body 90 has a first flow path 71 and a second flow path 81, and LP gas is present inside and outside the interior container 60. Therefore, it is not necessary to be a container that can withstand high pressure like the outer container 10, and it may be a container made of a thin plate material compared to the outer container 10. The reduction in the volume inside the outer container 10 due to the arrangement of the inner container 60 in the outer container 10 is only the wall thickness of the inner container 60 and is small. As shown in the LP gas container 10A in FIG. 1, the exterior container 10 has a sufficient capacity even when it is filled with the prescribed 100% (50 kg) LP gas. 4 is the same as the conventional LP gas container 10A shown in FIGS. 1 to 3, even if the inner container 60 is disposed inside the outer container 10 having the same structure. It is possible to fill the same amount of LP gas as the LP gas container 10A. That is, the LP gas container 10B shown in FIGS. 4 and 5 is compatible with the conventional LP gas container 10A shown in FIGS.

  Here, as a term common to the second and subsequent embodiments described later, it is sandwiched between the celestial mirror 70 of the internal container 60 and the celestial mirror 20 of the external container 10 in the internal space of the external container 10. A region including both a space and a space sandwiched between the body 90 of the interior container 60 and the body 40 of the exterior container 10 facing the body 90 of the interior container 60, that is, the first shown in FIGS. In the case of the embodiment, a region outside the interior container 60 is referred to as a “first region”. Correspondingly, the first flow path 71 and the second flow path 81 are between the first area of the internal space of the outer container 10 except for the first area. In the case of the first embodiment shown in FIGS. 4 and 5, the connected region is referred to as a “second region” in the inner container 60. Furthermore, the interior container 60 in the first embodiment is divided into a first region and a second region when the interior of the exterior container 10 is expressed in terms common to the second and subsequent embodiments described later. This is an example of a “partition wall”. Similarly, the celestial mirror 70 of the interior container 60 according to the first embodiment is formed with a penetrating first flow path that divides the interior of the exterior container up and down with a space between the celestial mirror of the exterior container. This is an example of the “top plate”. Further, the body 90 of the interior container 60 in the first embodiment is a “side plate” that is widened to face the body of the exterior container with a space between the body 90 of the exterior container and the upper part is connected to the periphery of the top plate. It is an example.

  FIG. 4 shows the dimensions of the LP gas container 10B. Each symbol of a to d entered here is a position where a thermocouple for temperature measurement is attached on the outer wall surface of the container in an experiment described later. Details will be described later.

  6 and 7 are diagrams showing the behavior when the gas is consumed in the first embodiment shown in FIGS. 4 and 5. 6 and 7, the filling amount of LP gas is the prescribed 30% (15 kg). FIG. 6 shows that when the gas consumption per unit time is small, FIG. 7 shows the large gas consumption per unit time. Shows the case.

  When the gas consumption is small or when the liquid temperature inside the container is high, a required amount of gas can be supplied from the first flow path 71 provided in the celestial mirror 70 of the interior container 60. For this reason, as shown in FIG. 6, the liquid level 50 a outside (in the first region) of the interior container 60 is almost the same as the liquid level 50 b in the interior container 60 (in the second region). ing.

  On the other hand, when the gas consumption is large or the liquid temperature inside the container is low, the first flow path 71 provided in the celestial mirror 70 of the interior container 60 becomes a large pressure loss (resistance) and the interior container. Since the gas pressure outside the interior container 60 is lower than the gas pressure inside the interior 60, the LP gas flows out from the second flow path 81 provided in the ground mirror 80 of the interior container 60 in a liquid state. As shown in FIG. 7, the liquid level 50a in the first region (the region between the interior container 60 and the exterior container 10) rises.

  When the liquid level 50a in the first region rises, the contact area between the gas liquid and the wall surface of the outer container 10 is greatly increased, and a large amount of latent heat of vaporization is supplied through the wall surface of the outer container 10 to increase the contact area. Evaporation amount is secured.

  FIG. 8 is a view showing a state in which gas consumption is stopped in the LP gas container of the first embodiment. FIG. 8 is a view corresponding to FIG. 3 in a conventional LP gas container.

  The liquid level of the gas liquid inside the LP gas container 10B of the first embodiment shown in FIG. 8 is the same as the liquid level in the conventional LP gas container 10A shown in FIG. It is. However, in the case of the LP gas container 10B of the first embodiment, it is divided into two chambers, ie, a first region outside the interior container 60 and a second region inside the interior container 60, so that liquid and gas Circulation occurs. That is, a condensation phenomenon occurs on the liquid surface in the cooled container, and a gas flow occurs. A liquid flow is also generated by this condensation, and the circulation inside the container continues.

  The flow of the liquid and gas is opposite to that of the “heat pipe”, but this heat exchange by the liquid-gas circulation is directly connected to taking in heat with high efficiency. That is, not only the supply of heat from the portion of the wall surface of the container as high as FIG. 3 (arrow A), but also the heat supply is performed at the upper part as shown by arrow A ′, as shown in FIG. As compared with the conventional LP gas container 10A, the internal liquid temperature rises quickly.

  FIG. 9 is a diagram showing the temperature change of the outer wall surface of the outer container of the LP gas container according to the first embodiment described with reference to FIGS. 4 to 8.

  FIG. 9 shows data when gas is consumed at a consumption amount of 7.5 kg / hour, starting from a residual gas amount of 30% (15 kg). Here, the same experiment was performed for the conventional LP gas container 10A shown in FIGS. 1 to 3, and FIG. 9 also shows the temperature change of the conventional LP gas container 10A.

  The temperature measurement points are the four points a to d shown in FIG. 4 for the LP gas container 10B of the first embodiment. The conventional LP gas container 10A (see FIG. 1) has the same height as a, b, and d in FIG. However, here, symbols A, B, and D are used in place of symbols a, b, and d in order to represent conventional data. In the conventional type, temperature measurement is not performed for a point corresponding to the point c in the first embodiment. Here, like the “point a” and the “curve a”, the same reference numerals are used for the measure measurement point and the curve representing the temperature change at the temperature measurement point.

  In the graph shown in FIG. 9, the difference between the conventional type (FIG. 1) and the present embodiment (FIG. 4) is noticeable in the temperature change at points b and B, 400 mm from the bottom. In the case of the conventional type, as shown by the curve B, the temperature of the outer wall surface of the container slightly decreases until it reaches about 50 to 60 minutes, but does not significantly decrease. On the other hand, in the case of the present embodiment, as shown by the curve b, the temperature of the outer wall surface of the container continues to greatly decrease with the temperature decrease curve of the same level as the curve a until about 60 to 70 minutes have passed.

  In the case of the conventional type, the liquid inside does not exist at a height position of 400 mm from the bottom, but in the case of this embodiment, the liquid has risen to the height position until 60 to 70 minutes have passed. It means that. In addition, the fact that the temperature of the outer wall surface of the container has greatly decreased means that the latent heat of vaporization commensurate with the decrease in temperature has been supplied into the container. In the case of the present embodiment, the curve c indicating the temperature at a height of 600 mm from the bottom also decreases with a temperature drop curve at the same level as the curves a and b until around 40 minutes. In the case of this embodiment, this means that the liquid has risen to the point c from the start of the experiment until 40 minutes have passed.

  FIG. 10 is a diagram showing another experimental data on the temperature change of the outer wall surface of the LP gas container of the first embodiment.

  Here, the experiment is started from a state where the residual gas amount is 60% (30 kg). The gas consumption is 7.5 kg / hour as in FIG. 9, and the temperature measurement points are the four points a to d shown in FIG. 4 as in FIG. Here, no experiment was conducted on a conventional LP gas container.

  Graph d in FIG. 10 shows a temperature change at a height of 800 mm from the bottom, but shows a temperature change at points c and b at a height of 600 mm and 400 mm from the bottom until about 70 minutes have passed since the start of the experiment. The temperature is decreasing at almost the same rate of change as the graphs c and b. This means that the liquid had risen to a height of 800 mm from the bottom until about 70 minutes from the start of the experiment. Similarly, as can be seen from the graphs c and d, the liquid had risen to a height of 600 mm from the bottom until about 100 minutes from the start of the experiment, and the liquid had risen to a height of 400 mm from the bottom until about 140 minutes from the start of the experiment. Can be seen to have risen.

  As can be seen from the graphs of FIGS. 9 and 10, in the case of this embodiment, the liquid level 50a (see FIG. 7) of the first region (the region sandwiched between the outer container 10 and the inner container 60) rises. The heat from outside is taken in efficiently.

  Hereinafter, other embodiments of the present invention will be exemplified.

  11 and 12 are a longitudinal sectional view and a transverse sectional view, respectively, of an LP gas container as a second embodiment of the liquefied gas container of the present invention.

  In FIG. 11 and FIG. 12, the same reference numerals as those used in the respective drawings of the first embodiment are used for the constituent elements having the same role as the constituent elements in the first embodiment described above even if the shapes are different. A description will be given with a focus on the differences from the first embodiment.

  The LP gas container 10 </ b> C of the second embodiment is not provided with the interior container 60 independent of the exterior container 10, and has a shape in which a part thereof is shared with the exterior container 10. That is, in the LP gas container 10 </ b> C of the second embodiment, the celestial mirror 70 and the ground mirror 80 constituting the interior container 60 are directly connected to the inner wall of the exterior container 10 at about a half circumference. Correspondingly, the body 90 constituting the interior container 60 extends facing the body 40 of the exterior container 10 over about a half circumference, and the upper part and the lower part thereof are the celestial mirror 70 and the ground mirror of the interior container 60, respectively. It is connected to the peripheral edge of 80.

  In the case of the first embodiment described above, only the gas liquid existing in the first region (the region outside the interior container 60) directly contacts the inner wall surface of the exterior container 10 and the second region (the interior) Heat from the outside cannot be directly transferred to the gas liquid in the region inside the container 60. On the other hand, in the second embodiment shown in FIGS. 9 and 10, heat from the outside can be distributed and transmitted to the liquid in the first region and the liquid in the second region. When heat is transmitted to the liquid in the second region via the wall surface of the outer container 10, the gas pressure in the second region increases and the outflow of the gas liquid from the second flow path 81 is promoted. The gas liquid that has flowed out into the first region is sandwiched between the body 90 of the interior container 60 and the body 40 of the exterior container 10, and heat is transmitted through the body 40 of the exterior container 10 to promote evaporation. That is, in the case of the second embodiment, the distribution of heat transfer can be determined at the time of designing the container, and the degree of design freedom is increased. Moreover, it can lead to the reduction of the material cost of this LP gas container.

  FIG. 13 is a longitudinal sectional view of an LP gas container as a third embodiment of the liquefied gas container of the present invention. FIG. 14 is an enlarged view of a portion of a circle R in the longitudinal sectional view of the third embodiment shown in FIG.

  In the LP gas container 10D of the third embodiment shown in FIGS. 13 and 14, the outer container 10 is the same as that of the previous embodiments, but a partition wall 60A that can no longer be called an inner container is formed in the outer container 10D. Is provided. The partition wall 60A includes a top plate 70A, a side plate 90A, and a closing plate 92A that closes the lower end of the side plate 90A. The ceiling plate 70A constituting the partition wall 60A is formed of a flat plate, unlike the celestial mirror 70 swelled upward of the interior container 60 in the previous embodiments. It is the same as the celestial mirror 70 of the interior container 60 in the embodiment. That is, the top plate 70A of the third embodiment is also a plate material that divides the interior of the exterior container 10 up and down with a space between the exterior container 10 and the celestial mirror 20, and penetrates the first through the center. A flow path 71A is formed.

  Further, the side plate 90A constituting the partition wall 60A is spaced from the body 40 of the outer container 10 so as to face the body 40 and spread over one circumference, and its upper part is connected to the peripheral edge of the top plate 70A. Yes. The closing plate 92A blocks a space sandwiched between the side plate 90A of the partition wall 60A and the body 40 of the outer container 10 along the lower end of the side plate 90A. Moreover, between the lower part of this side plate 90A and the bottom part of the exterior container 10, the pipe | tube 93 opened to both ends is extended. That is, in the LP gas container 10D of the third embodiment, the space sandwiched between the top plate 70A of the partition wall 60A and the celestial mirror 20 of the exterior container 10 faces the side plate 90A of the partition wall 60A and the side plate 90A. A “first region” is formed by both the space sandwiched between the body 40 of the exterior container 10, and is below the top plate 70 </ b> A and inside the side plate 90 </ b> A excluding the first region, A “second region” is formed by the region including the bottom of the ten. The first region and the second region have a first flow path 71A formed on the top plate 70A, both ends open, one end is connected to the first region, and the other end is the exterior container 10. It connects with the pipe | tube 93 arrange | positioned at the bottom part. This pipe 93 is an example of the second flow path referred to in the present invention.

  The liquid at the bottom of the outer container 10 flows through the pipe 93 to the first region (the region sandwiched between the side plate 90A and the body 40), raises the liquid level 50a of the first region, It receives vaporization latent heat through the wall and evaporates.

  The LP gas container 10D of the third embodiment shown in FIGS. 13 and 14 also ensures compatibility with the conventional LP gas container and takes in latent heat of vaporization with high efficiency.

  In the description of the LP gas container of the first embodiment, the first flow path 71 is described as a hole having a diameter of 1 mmφ, and the second flow path 81 is described as a hole having a diameter of 2 mmφ. However, an opening having an appropriate hole diameter is selected according to the size and shape of the LP gas container, the region where the LP gas filled in the LP gas container is used, the environment, and the like.

  When the hole diameter is small and there is a possibility of clogging, the hole diameter may be widened by using a multistage orifice.

  Furthermore, although the LP gas container has been described as an example here, the present invention is not limited to the LP gas container, and is generated by the evaporation of the liquefied gas filled with the supply of vaporization heat from the container wall surface. The present invention can be widely applied to a liquefied gas container for taking out the generated gas.

DESCRIPTION OF SYMBOLS 10 Exterior container 10A, 10B, 10C, 10D LP gas container 20, 70 Celestial mirror 21 Container valve 30, 80 Ground mirror 31 Skirt 40, 90 Body 50 LP gas 60 Interior container 60A Partition wall 70A Top plate 71, 71A 1st Channel 81 second channel 90A side plate 91 support member 93 tube

Claims (2)

In a liquefied gas container that is filled with liquefied gas and receives vaporization heat from the vessel wall surface to evaporate and take out the gas generated by the evaporation,
It has a celestial mirror with a container valve that covers the top, a ground mirror that covers the bottom, and a fuselage that connects the celestial mirror to the ground mirror and surrounds it, and is filled with liquefied gas. An outer container,
A space is provided between the fuselage and a top plate formed with a first flow path that penetrates and is always open , separating the interior of the exterior container up and down with a space between the celestial mirror and the body. And a side plate having an upper portion facing the body and having an upper portion connected to the periphery of the top plate, and has a second flow path that is open at the bottom of the exterior container and is always open. A first region including both a space sandwiched between the top plate and the celestial mirror and a space sandwiched between the side plate and the body facing the side plate; and excluding the first region, A partition wall that divides the first region into a second region connected by the first channel and the second channel ,
The second channel is wider than the first channel, and the first channel is connected to the second region and the first region when the gas pressure in the first region decreases. A flow path that generates a differential pressure of the gas pressure with respect to the area, and the second flow path is a flow path that causes the liquefied gas in the second area to flow out as a liquid by the differential pressure. A liquefied gas container characterized by.   The partition wall has a ground plate in which the second flow path is formed to vertically separate the interior of the outer container with a space from the ground mirror, and the side plate makes a round along the peripheral wall. 2. The liquefied gas container according to claim 1, wherein the liquefied gas container is an interior container disposed inside the exterior container, wherein an upper part is connected to the top plate over a round and a lower part is connected to the base plate over a round.

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