JP2014000800A - Moisture-sensitive and moisture-permeable film, moisture-sensitive and moisture-permeable device, vegetable case, and refrigerator - Google Patents

Moisture-sensitive and moisture-permeable film, moisture-sensitive and moisture-permeable device, vegetable case, and refrigerator Download PDF

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Publication number
JP2014000800A
JP2014000800A JP2013104332A JP2013104332A JP2014000800A JP 2014000800 A JP2014000800 A JP 2014000800A JP 2013104332 A JP2013104332 A JP 2013104332A JP 2013104332 A JP2013104332 A JP 2013104332A JP 2014000800 A JP2014000800 A JP 2014000800A
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moisture
permeable
humidity
permeable membrane
vegetable case
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JP6209361B2 (en
Inventor
Kumiko Suzuki
久美子 鈴木
Toshinori Noda
俊典 野田
Guoxin Yu
国新 兪
wei-ying Zhang
維穎 張
Kiyoshi Kamei
清 亀井
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Panasonic Corp
パナソニック株式会社
Rengo Co Ltd
レンゴー株式会社
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Abstract

PROBLEM TO BE SOLVED: To prevent water spot of a vegetable or the like by dew condensation and to keep freshness by preventing dew condensation by discharging moisture in a vegetable case to the outside when the case is brought into a high humidity state, and by preventing the dissipation of moisture in the vegetable case when the case is brought into a low humidity state.SOLUTION: Regenerated cellulose whose moisture permeation amount changes depending on humidity is held to the cellulose base material 5 to form a moisture-sensitive and moisture-permeable film 4, in which regenerated cellulose is held in a film form on the whole area of opening spaces 5a. Thereby, the amount of moisture permeation from the vegetable case is suppressed when the humidity is low, and the amount of moisture permeation is increased when the humidity is high. Accordingly, the freshness of fruits and vegetables or the like is kept for a long period of time in a high humidity environment without causing dew condensation in a closed case. Further, since the non-crystalline structure changes reversibly according to the humidity change as a characteristic of the regenerated cellulose, the amount of moisture permeation is reduced when the humidity in the vegetable case is lowered, and accordingly, it becomes possible to maintain a higher humidity environment.

Description

  The present invention relates to a moisture and moisture permeable membrane, a moisture and moisture permeable device, a vegetable case, and a refrigerator equipped with the vegetable case.

  Factors that affect the decline in freshness of vegetables include temperature, humidity, environmental gas, microorganisms, and light. Vegetables are living things, and respiration and transpiration are performed on the surface of the vegetables. To maintain freshness, it is necessary to suppress respiration and transpiration. “Temperature” and “Humidity” can be cited as factors necessary for the suppression of respiration and transpiration.

  As a means often used for preservation, there is a technique for enhancing hermeticity by photosynthetic preservation or silicon film, but none of them can maintain the humidity of the vegetable case.

  Furthermore, in order to maintain the freshness of fruits and vegetables for a long period of time, it is desirable to store them in a sealed vegetable special case and keep the vegetable special case at high humidity. On the other hand, condensation occurs inside the vegetable special case. It also had the problem of doing.

  In order to solve this problem, on at least one side of the vegetable case, when the humidity is high, the amount of moisture permeation increases, and excess moisture is discharged to the outside. On the other hand, when the humidity is low, the amount of moisture transmission Means for reducing the humidity and preventing moisture from escaping are effective.

  As a conventional moisture permeable membrane technology, there is a temperature-sensitive moisture permeable membrane technology in which the amount of moisture permeation varies with temperature (see, for example, Patent Document 1).

  FIG. 8 shows a vegetable case in which a conventional temperature-sensitive moisture-permeable membrane disclosed in Patent Document 1 is installed.

  As shown in FIG. 8, the vegetable case 1 includes a vegetable case body 2 and a vegetable case cover 3 designed so that the vegetable case body 2 can be covered. 3a.

  This temperature-sensitive moisture permeable membrane 3a has a glass transition point at 0 to 10 ° C., and has a feature that when the temperature is in the vicinity thereof, the binding force of molecules is loosened and the interval between molecules is widened. Taking advantage of the characteristic that, when the temperature rises, the amount of moisture transmission increases, while when the temperature decreases, the molecular state returns to the original state and the distance between molecules narrows, reducing the amount of moisture transmission. Thus, it is possible to automatically control the humidity of the vegetable case.

JP-A-8-164590

  However, since the conventional temperature-sensitive moisture permeable membrane has temperature responsiveness in which the amount of moisture permeation changes depending on the temperature, the temperature-sensitive moisture permeable membrane increases the humidity at low temperatures and approaches 100% Rh. There is a problem that condensation occurs in the heat and moisture permeable membrane itself, and the stored fruits and vegetables cause water rot due to the condensation.

  The present invention solves the above-described conventional problems. When the humidity is reached, the moisture of the vegetable case is discharged to the outside to prevent dew condensation. On the other hand, when the humidity is reduced, the vegetable case Moisture and moisture permeable membrane, moisture permeable and moisture permeable device that can maintain high humidity while preventing water rot due to condensation even when vegetables and fruits are stored in a vegetable case. An object is to provide a vegetable case and a refrigerator.

In order to solve the above conventional problems, the moisture-permeable and moisture-permeable membrane of the present invention includes a base material made of cellulose and regenerated cellulose held on the base material, and the amount of the regenerated cellulose is that of the base material. It is set to 0.3 to 3.0 g / m 2 with respect to the area.

  As a result, the non-crystallinity of the regenerated cellulose is such that the cellulose molecules are not hydrogen bonded or are partially hydrogen bonded, so that moisture in the air hardly enters between the cellulose molecules at low humidity, while high humidity When moisture is in a high humidity state due to the humidity-sensitive property that moisture can easily pass through between molecules and the moisture (humidity) in the air can move through, and the amount of moisture movement increases. The moisture of the vegetable case can be discharged to the outside to prevent condensation, while the moisture of the vegetable case can be prevented from escaping when the humidity becomes low.

  Since the moisture-sensitive moisture permeable membrane of the present invention can always keep the inside of the vegetable case at high humidity, it can enhance the freshness of the stored vegetables.

Image diagram of moisture-permeable and moisture-permeable membrane in Embodiment 1 of the present invention Laminated diagram of moisture-permeable and moisture-permeable membrane and nonwoven fabric in Embodiment 1 of the present invention Schematic of a moisture and moisture permeation apparatus in which the periphery of the moisture and moisture permeation membrane in Embodiment 1 of the present invention is fixed The cross-sectional view of the vegetable case which has arrange | positioned the moisture-permeable moisture-permeable film in Embodiment 1 of this invention The graph showing the humidity dependence of the moisture-permeable performance of the moisture-permeable moisture-permeable film in Embodiment 1 of this invention The graph showing the temperature dependence of the moisture-permeable performance of the moisture-permeable moisture-permeable film in Embodiment 1 of this invention The perspective view of the vegetable case which has arrange | positioned the moisture-permeable moisture-permeable film apparatus in Embodiment 2 of this invention. Sectional drawing of the refrigerator provided with the vegetable case which has arrange | positioned the moisture-sensitive moisture-permeable membrane apparatus in Embodiment 3 of this invention. Perspective view of a vegetable case with a conventional moisture-sensitive and permeable membrane Chemical formula showing cellulose

1st invention is a moisture-sensitive moisture permeable film, Comprising: The base material which consists of a cellulose, and the regenerated cellulose hold | maintained at the said base material, The quantity of the said regenerated cellulose is 0 with respect to the area of the said base material 0.3 to 3.0 g / m 2, and the rate of change in moisture permeability in a high humidity region (humidity 90 to 95% Rh region) is low in a low humidity region (humidity 10 to 50% Rh). It can be about three times larger than the moisture permeability.

According to a second invention, in the first invention, the cellulose density of the base material is 0.3 to 1.0 g / cm 3, and moisture permeability in a high humidity region (humidity 90 to 95% Rh region). The rate of change in capacity can be about 5 times the moisture permeability in the low humidity region (humidity 10-50% Rh).

  According to a third invention, in the first or second invention, the base material is any one of pulp, rayon, or a mixed paper of pulp and rayon (a paper made by mixing raw materials). Since the regenerated cellulose is hydrophilic and the same material, the regenerated cellulose can be strongly held on the cellulose of the base material, and the regenerated cellulose can be prevented from falling off the base material.

  A fourth invention is the invention according to any one of the first to third inventions, wherein the regenerated cellulose is solidified by acid treatment after coating or dipping viscose on the base material and holding the base material on the base material. The regenerated cellulose can be retained on the substrate by a simple treatment such as sulfuric acid treatment. Unlike the means of adhering the regenerated cellulose by using a binder (adhesive), a binder (adhesive) becomes unnecessary. There is no inhibition of the moisture permeability effect by the binder (adhesive), and the moisture permeability effect can be prevented from being lowered.

  According to a fifth invention, in the fourth invention, the viscose is diluted with water so that the concentration of viscose is 20 to 50%, and when the viscose concentration is a low concentration of less than 20%, When the amount of regenerated cellulose to be regenerated is too small and the retention of regenerated cellulose on the substrate is reduced, on the other hand, when the viscose concentration exceeds 50%, the viscosity increases due to the high viscose concentration. Since it can be prevented that the retention of the regenerated cellulose due to the viscose concentration is inhibited such that the coating is inhibited, the regenerated cellulose can be more efficiently held on the substrate.

  A sixth invention is the invention according to the fourth or fifth invention, wherein the viscose is mixed with an antifungal agent, and when the regenerated cellulose is held on the base material, the antifungal agent is mixed in the viscose. Therefore, since the regenerated cellulose can be regenerated in a state where the antifungal agent is contained in the regenerated cellulose, the antifungal treatment can be easily performed.

  A seventh aspect of the present invention is a moisture and moisture permeable device in which a nonwoven fabric having a shear strength stronger than that of the moisture and moisture permeable membrane is laminated on at least one surface of any one of the moisture and moisture permeable membranes. In addition, the moisture-permeable and moisture-permeable membrane can be prevented from being easily broken.

  According to an eighth invention, in the seventh invention, the periphery of the moisture-permeable and moisture-permeable membrane and the nonwoven fabric is fixed to a frame. It can be made easier.

  The ninth invention is a vegetable case in which the eighth moisture-sensitive breathable device is arranged on at least one surface, and can be kept at high humidity without worrying about condensation simply by storing vegetables in the case. It is possible to preserve vegetables with good freshness.

  A tenth aspect of the invention is a refrigerator equipped with the vegetable case according to claim 9, and not only the vegetables to be stored are stored under high humidity conditions without dew condensation, but also the refrigeration cycle system of the refrigerator reduces the temperature. In addition, the freshness of the vegetables to be stored can be maintained for a long time.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an image diagram of a moisture and moisture permeable membrane in Embodiment 1 of the present invention, FIG. 2 is a laminated diagram of the moisture and moisture permeable membrane and nonwoven fabric in Embodiment 1 of the present invention, and FIG. FIG. 4 is a schematic view of a moisture and moisture permeable device in which the periphery of the moisture and moisture permeable membrane in Embodiment 1 of the present invention is fixed, and FIG. 4 arranges the moisture and moisture permeable membrane in Embodiment 1 of the present invention. FIG. 5a is a graph showing the humidity dependence of the amount of regenerated cellulose and moisture permeability of the moisture-permeable and moisture-permeable membrane in Embodiment 1 of the present invention, and FIG. It is a graph showing the humidity dependence of the use temperature of the moisture-permeable moisture-permeable film in Embodiment 1 of an invention, and moisture-permeable performance.

  1, 2, 3, 4, 5 a, and 5 b, the substrate 5 of the moisture-permeable and moisture-permeable membrane 4 is made of a cellulose material, and pulp, rayon, or a mixture of pulp and rayon (raw material) Or made of paper). The regenerated cellulose 6 is held on the cellulose material of the base material 5. The base material opening space 5 a is an opening between the fibers of cellulose that is the base material 5. The regenerated cellulose 6 is held so as to cover the substrate opening space 5a.

  On the other hand, the nonwoven fabric 7 has a stronger shear strength than the moisture-permeable and moisture-permeable membrane 4 and is installed so as to laminate the moisture-sensitive and moisture-permeable membrane 4. In the case of the present embodiment, the moisture permeable and moisture permeable membrane 4 is laminated in a state of being sandwiched between two nonwoven fabrics 7. Further, the moisture and moisture permeation apparatus 8 is configured in such a manner that the periphery of the nonwoven fabric 7 laminated on the moisture and moisture permeable membrane 4 and the moisture and moisture permeable membrane 4 is fixed by a frame 9. Further, an opening is provided in a part of the vegetable case main body 2, and the moisture and moisture permeation device 8 is installed in such a manner that the opening is sealed with a frame 9. The vegetable case body 2 is provided with a space for storing fruits and vegetables.

  Moreover, the vegetable case main body 2 may be arranged in such a manner that a vegetable case lid 3 is disposed, an opening is provided in a part of the vegetable case lid 3, and the moisture- and moisture-permeable device 8 is sealed against the opening. .

  First, the role of the regenerated cellulose constituting the moisture-sensitive moisture permeable membrane 4 will be described.

  Cellulose generally called is roughly classified into two, naturally occurring cellulose and regenerated cellulose.

  First, cellulose is a carbohydrate having a crystal structure (polysaccharide represented by a chemical formula in FIG. 9) contained in a natural plant cell wall, and has a parallel chain structure in which the orientation of reducing ends is the same in the crystal. . This equilibrium chain structure exists as fine fibers and is called microfibril (an aggregate unit of filamentous cellulose molecules). In the microfibril cellulose, hydrogen bonds are generated between cellulose molecules, and when long polymers are assembled in an orderly manner, the cellulose becomes a strong hydrogen bond aggregate (crystal region). Therefore, moisture cannot enter between molecules (it is difficult to enter), and therefore the same crystal structure is maintained regardless of humidity. Therefore, moisture hardly passes regardless of high humidity or low humidity.

  However, the regenerated cellulose 6 constituting the moisture-sensitive moisture permeable membrane of the present invention is a cellulose regenerated using viscose as a raw material (FIG. 9) and is a carbohydrate (polysaccharide) represented by For this reason, cellulose uses natural materials as they are, while regenerated cellulose is acidified against viscose (sodium cellulose xanthate) obtained by adding carbon disulfide after cellulose treatment with sodium hydroxide. It is a regenerated cellulose that has been treated and revived to the cellulose state again. For this reason, regenerated cellulose has many crystal structures that are characteristic of cellulose, and there are many antiparallel chain structures in which the directions of the non-reducing ends of adjacent molecular chains are different, that is, non-crystalline structures.

  The non-crystalline property of this regenerated cellulose is that the cellulose molecules are not hydrogen bonded or are partially hydrogen bonded, so that moisture in the air is difficult to enter between the cellulose molecules at low humidity, that is, in a dry state. ing. On the other hand, when the humidity is high, that is, when there is a lot of moisture in the air, the moisture easily enters between the molecules. As a result, it becomes a swollen state and can move so that moisture (humidity) in the air can pass through, and the amount of moisture movement increases. Due to such characteristics, the regenerated cellulose has characteristics such that the humidity passing through the regenerated cellulose and the moisture permeation amount increase as the humidity increases, that is, humidity sensitivity.

  Due to the properties of regenerated cellulose as described above, the moisture-permeable and moisture-permeable membrane 4 has a property that the moisture permeability increases as the humidity increases.

The moisture permeable and moisture permeable membrane 4 has a density of the substrate 5 of 0.3 to 1.0 g / cm 3 , and the amount of the regenerated cellulose 6 is 0.3 to 3.0 g / of the area of the substrate 5. By setting m 2 , the rate of change in moisture permeability in the high humidity region (humidity 90 to 95% Rh region) is approximately 5 times the moisture permeability in the low humidity region (humidity 10 to 50% Rh). Can do.

  Furthermore, the regenerated cellulose of the moisture-permeable and moisture-permeable membrane 4 of the present invention was formed by coating or dipping 20-50% viscose on the substrate 5 and then solidifying and holding the cellulose by acid treatment. Is. If the viscose concentration is less than 20%, the amount of regenerated cellulose in the substrate opening space 5a that is the gap between the fibers of the substrate 5 is small, so that the cellulose film is hardly formed. Furthermore, when the viscose concentration exceeds 50%, the viscosity is so high that the viscose does not uniformly enter the substrate opening space 5a that is the gap between the fibers of the substrate 5 and it is difficult to form a cellulose film. And unevenness may occur.

  As a result, when the humidity inside the vegetable case 1 is reduced, such as when the fruits and vegetables stored in the vegetable case 1 are stored in a small amount or immediately after part of the fruits and vegetables is taken out, the moisture-sensitive moisture permeable membrane 4 works. Since the amount of moisture released from the vegetable case is very small, it can be almost confined. On the other hand, when the internal space of the vegetable case 1 is in a high humidity state, such as when a large amount of fruits and vegetables are stored in the vegetable case 1 or when the vegetable case 1 is stored for a long time, the moisture-sensitive moisture permeable membrane 4 is released from the vegetable case. Condensation occurs if the amount is too small, and the resulting condensation causes water rot to occur, but the moisture-permeable and moisture-permeable membrane 4 increases the amount of moisture permeation. In the case 1, the vegetables can be kept fresh without water rot without causing condensation.

  Further, as a means for allowing viscose to permeate the base material 5, there is a method for coating or dipping viscose. The coating is to apply viscose to the surface of the substrate 5, and the dipping is to immerse the substrate 5 in the viscose. In this coating method, since the regenerated cellulose is held only on the surface of the base material 5, the dipping method that allows the viscose to penetrate into the base material 5 is more desirable.

  Furthermore, for the purpose of infiltrating the viscose into the inside of the base material 5, it is desirable to apply pressure from above and below in a state where the viscose is impregnated with a mechanical roll press after coating or dipping the viscose.

  Further, after impregnating the base material 5 with viscose, as a means for holding the regenerated cellulose 6 on the base material 5, acid treatment is performed with a sulfuric acid solution, and the viscose is regenerated and treated with a synthetic polymer fiber. It is desirable to solidify the cellulose 6 in the substrate opening space 5a of the substrate 5 because the adhesion strength between the substrate 5 and the regenerated cellulose is increased.

  The moisture permeation performance of the moisture-sensitive moisture-permeable membrane of the present invention obtained by the manufacturing method as described above will be described.

  FIG. 5a is a graph showing the humidity dependence of the amount of regenerated cellulose and moisture permeability of the moisture-permeable and moisture-permeable membrane in Embodiment 1 of the present invention, and FIG. It is a graph showing the humidity dependence of the operating temperature of a film | membrane and moisture permeability.

  The moisture permeation performance of the moisture permeable and moisture permeable membrane 4 will be described with reference to FIGS. 5a and 5b.

  Further, the moisture permeation performance is shown as a moisture permeation amount in these drawings. This humidity permeation amount is an amount defined as the weight of moisture that passes through the moisture-permeable and permeable membrane 4 per unit area per unit time.

As can be seen from FIG. 5a, the moisture-permeable and permeable membrane 4 tends to gradually increase the amount of moisture permeation as the humidity increases. Here, when the humidity permeation amount of the moisture-permeable moisture permeable membrane 4 in which the regenerated cellulose is held with respect to the density of the base material 5 of 0.3 to 1.0 g / cm 3 is examined, the humidity is changed from 90% to 95%. It can be seen that the increase in the amount of moisture permeation when increased by 5% is 2 to 10 times greater than when increased by 40% from 50% to 90%. In other words, the amount of moisture permeation rapidly increases in a high humidity state of 90%. This phenomenon is caused by the fact that the cellulose molecular structure of the regenerated cellulose described at the beginning of Embodiment 1 is an amorphous structure. In a low humidity state, moisture in the air is present between the amorphous cellulose molecules. This is because when the moisture in the air enters between the cellulose molecules in a high humidity state, the intermolecular molecules swell and the water easily penetrates.

  Next, FIG. 5b is a result of confirming the difference in performance of the moisture-sensitive moisture permeable membrane 4 depending on the temperature.

  As can be seen from FIG. 5b, when the low temperature (5 ° C.) and the high temperature (23 ° C.) are compared, it can be seen that the amount of moisture permeation is lower overall at the low temperature. This is presumably because the movement speed of moisture in the air was reduced because the temperature was lowered.

  Thus, in the case of the moisture-permeable moisture permeable membrane 4 in which the regenerated cellulose is held on the base material 5, it can be confirmed that the moisture permeable performance can be expressed, and the moisture permeable ability in the high humidity region (humidity 90 to 95% Rh region). The rate of change was about 5 times the moisture permeability in the low humidity region (humidity 10-50% Rh).

  Furthermore, in the above production method, if a mold preventive agent is mixed in advance with respect to the viscose, a moisture-proof moisture permeable membrane 4 finally formed is not used with a binder for the mold preventive agent. It is desirable because the regenerated cellulose can be retained in the state where the fungicide is contained, and the moisture-sensitive and moisture-permeable performance by the binder is not impaired.

  In addition, as an antifungal agent, from the viewpoint of selecting a material that does not change into a strong alkali of viscose and is hardly soluble in water, TBZ, silver, copper, zinc and other inorganic materials, triazine, isoplatiolane, iprodione, siabendazole There are organic anti-fungal agents, and among them, it is desirable to use TBZ which is widely used as a food additive, is inexpensive and has a fungicidal effect over a long period of time.

(Embodiment 2)
FIG. 6 is a perspective view of a vegetable case in which the moisture-sensitive moisture permeable membrane device according to Embodiment 2 of the present invention is arranged.

  The moisture and moisture permeable device 8 of the present invention has a frame around the moisture and moisture permeable membrane 4 in terms of making it easy to carry the moisture permeable and moisture permeable membrane 4 and improving the mounting operability during manufacturing. 9 is fixed. This frame has needle-like ribs around the frame 9 and is fixed by penetrating the moisture-sensitive moisture permeable membrane 4. As another fixing means, there is insert molding, but since the frame 9 can be fixed without gaps at the same time as molding, the air in the vegetable case 1 always passes through the moisture and moisture permeable membrane 4. This is desirable from the viewpoint that moisture permeability can be obtained with certainty.

  Furthermore, the moisture-sensitive moisture-permeable device 8 is configured to be attached to the vegetable case lid 3 without a gap. Further, it is desirable that the vegetable case lid 3 is devised so as to have a hermetically sealed structure with respect to the vegetable case main body 2 in order to sufficiently bring out the moisture and moisture permeability of the moisture and moisture permeable membrane 4. If the vegetable case lid 3 cannot take a sealed structure with the vegetable case main body 2, it is possible to make the best use of the performance of the moisture permeable and moisture permeable membrane 4 by reducing the gap as much as possible. This is desirable because

  The vegetable case 1 includes a vegetable case lid 3 equipped with a moisture-permeable and moisture-permeable membrane 4, but it is not particularly necessary to provide the vegetable case lid 3, and the moisture-sensitive and moisture-permeable membrane device may be disposed on at least one surface. The same effect can be obtained. Here, at least one surface refers to a rear surface, a side surface, a bottom surface, and the like.

  Moreover, since the vegetable case main body 2 can be manufactured cheaply, it is desirable from the point comprised from polymeric materials, such as PP, PS, and ABS. It is also effective to incorporate an antibacterial agent into these polymer materials for the purpose of preserving vegetables more hygienically.

  On the other hand, the vegetable case body 2 absorbs heat from the outside, reaches the same temperature as the inside and outside of the vegetable case body 2 quickly, and prevents condensation due to the temperature difference. It is desirable to use a highly metallic material. On the other hand, since these metal materials have antibacterial performance, they are desirable from the viewpoint of preserving vegetables more hygienically.

  The operation of the moisture-permeable and moisture-permeable membrane 4 and the moisture-permeable and moisture-permeable membrane 4 of the present embodiment configured as described above will be described below for the vegetable case 1.

  First, vegetables to be stored are placed in the vegetable case body 2, and the vegetable case body 2 is sealed with the vegetable case lid 3. Here, when the moisture permeable and moisture permeable membrane 4 is not installed, the moisture inside the vegetable case exceeds 100% due to moisture transpiration from the vegetables, and the excess amount causes condensation inside the vegetable case main body 2. This caused water rot of the preserved vegetables due to the condensed water. However, since the vegetable case body 2 of the present invention is provided with the moisture permeable and moisture permeable membrane 4 on the vegetable case lid 3, the moisture in the vegetable case body 2 is sensed by the action of the regenerated cellulose of the moisture permeable and moisture permeable membrane 4. The moisture inside the vegetable case 1 does not exceed 100% because it passes through the moisture permeable membrane 4 and penetrates to the outside of the vegetable case body 2. For this reason, the vegetables stored in the vegetable case main body 2 can be stored in a high humidity state without causing water rot, and therefore can be stored in a state of maintaining freshness for a long time.

  On the other hand, when the amount of vegetables stored in the vegetable case body 2 is small and the amount of moisture transpiration from the vegetables is small, the moisture permeation rate of the moisture-sensitive moisture-permeable membrane 4 is reduced by the action of the regenerated cellulose of the moisture-permeable moisture-permeable membrane 4. Thus, the amount of humidity released from the vegetable case body 2 to the outside decreases. As a result, since the humidity inside the vegetable case 1 remains maintained, it can be stored while maintaining freshness for a long period of time.

  Even if the humidity varies depending on the amount of vegetables stored in the vegetable case main body 2 by the above-described operation, the moisture-permeable moisture permeable membrane 4 automatically functions according to the humidity in the vegetable case 1 according to the humidity in the vegetable case 1. Since the moisture permeation amount can be adjusted, dew condensation can be prevented while maintaining the high humidity in the vegetable case 1.

(Embodiment 3)
FIG. 7 is a cross-sectional view of a refrigerator provided with a vegetable case in which the moisture-sensitive and moisture-permeable membrane device according to Embodiment 3 of the present invention is arranged.

  In FIG. 7, the heat insulation box 101 which is the refrigerator main body of the refrigerator 100 is composed of an outer box 102 mainly using a steel plate, an inner box 103 formed of a resin such as ABS, an outer box 102 and an inner box 103. It is comprised with foaming heat insulating materials, such as hard foaming urethane etc. which are foam-filled in the space between, and is insulated with the circumference | surroundings and is heat-insulated by the partition wall in the several storage chamber. A refrigeration chamber 104 as a first storage chamber is provided at the top, and a switching chamber 105 as a fourth storage chamber and an ice making chamber 106 as a fifth storage chamber are provided side by side below the refrigeration chamber 104. In the lower part of the chamber 105 and the ice making room 106, 107 as a second storage room is arranged, and in the lowermost part, a vegetable room 108 as a third storage room is arranged.

  The refrigerated room 104 is set to a refrigerated temperature zone that is a temperature that does not freeze for refrigerated storage, and is usually set to 1 ° C. to 5 ° C. The vegetable temperature range is 2 ° C to 7 ° C. The freezer compartment 107 is set in a freezing temperature zone, and is usually set at −22 ° C. to −15 ° C. for frozen storage, but for example, −30 ° C. or −25 ° C. to improve the frozen storage state. It may be set at a low temperature. The vegetable compartment 108 is often provided with a drawer-type door.

  The vegetable compartment 108 includes a vegetable case 1, and a vegetable case lid 3 including a moisture-sensitive moisture-permeable device 8 is disposed in the vegetable case 1.

  Furthermore, the moisture-sensitive moisture-permeable device 8 is configured to be attached to the vegetable case lid 3 without a gap. Moreover, it is desirable that the vegetable case lid 3 is designed to have a sealed structure with respect to the vegetable case main body 2 in order to sufficiently bring out the moisture and moisture permeability of the moisture and moisture permeable membrane 4. If the vegetable case lid 3 cannot take a sealed structure with the vegetable case main body 2, it is possible to make the best use of the performance of the moisture permeable and moisture permeable membrane 4 by reducing the gap as much as possible. This is desirable because

  In addition, although the vegetable case main body 2 is equipped with the vegetable case cover 3 equipped with the moisture-permeable moisture-permeable film 4, it is not necessary to provide the vegetable case cover 3 in particular, and arrange | positions a moisture-sensitive moisture-permeable film apparatus on at least one surface. However, the same effect can be obtained. Here, at least one surface refers to a rear surface, a side surface, a bottom surface, and the like. However, since air has the property of being lighter at higher temperatures, the temperature in the upper part of the vegetable compartment 108 is higher than that in the lower part. At that time, if the relative temperature of the air is the same, the higher the absolute amount, the higher the absolute amount, so the absolute humidity in the vegetable case is higher in the upper part. Depending on the direction, condensation tends to occur. For this reason, it is desirable to provide a moisture-sensitive moisture permeable membrane device on the top where condensation is likely to occur.

  The switching chamber 105 can be switched to a preset temperature zone between the refrigeration temperature zone and the freezing temperature zone in addition to the refrigeration temperature zone, the vegetable temperature zone, and the freezing temperature zone. The switching chamber 105 is a storage chamber provided with an independent door arranged in parallel with the ice making chamber 106, and is often provided with a drawer-type door.

  In the present embodiment, the switching chamber 105 is a storage room including the temperature range of refrigeration and freezing. However, the refrigeration is performed by the refrigeration room 104 and the vegetable room 108, and the freezing is performed by the freezing room 107. A storage room specialized for switching only the temperature zone in the middle of freezing may be used. Moreover, the storage room fixed to the specific temperature range may be sufficient.

  The ice making chamber 106 creates ice with an automatic ice maker (not shown) provided in the upper part of the room with water sent from a water storage tank (not shown) in the refrigerated room 104, and an ice storage container ( (Not shown).

  The top surface portion of the heat insulating box 101 has a stepped recess shape toward the back of the refrigerator. A machine chamber 101a is formed in the stepped recess, and the compressor 109, moisture is formed in the machine chamber 101a. Houses high pressure side components of the refrigeration cycle such as a dryer (not shown) for removal. That is, the machine room 101 a in which the compressor 109 is disposed is formed by biting into the uppermost rear region in the refrigerator compartment 104.

  Thus, by providing the machine room 101a in the rear region of the uppermost storage room of the heat insulation box 101 that has become a dead space that is difficult to reach, the compressor 109 is disposed in the conventional refrigerator. The space in the machine room at the bottom of the easy-to-use heat insulation box 101 can be effectively converted as the storage room capacity, and the storage performance and usability can be greatly improved.

  The refrigeration cycle is formed of a series of refrigerant flow paths sequentially including a compressor 109, a condenser, a capillary as a decompressor, and a cooler 112, and a hydrocarbon-based refrigerant such as isobutane is enclosed as a refrigerant. Yes.

  The compressor 109 is a reciprocating compressor that compresses refrigerant by reciprocating a piston in a cylinder. In the case of a refrigeration cycle using a three-way valve or a switching valve for the heat insulation box 101, those functional parts may be disposed in the machine room 101a.

  In this embodiment, the decompressor constituting the refrigeration cycle is a capillary. However, an electronic expansion valve that can freely control the flow rate of the refrigerant driven by the pulse motor may be used.

  In the present embodiment, the matter relating to the main part of the invention described below is a type in which a compressor room is provided by providing a machine room in the rear region of the lowermost storage room of the heat insulating box 101, which has been generally used conventionally. It may be applied to other refrigerators.

  A cooling chamber 110 that generates cold air is provided on the back surface of the freezing chamber 107, and is partitioned from an air passage (not shown), and between them, a cold air conveying air passage (see FIG. And a rear partition wall 111 configured to thermally insulate each storage chamber. In addition, a partition plate (not shown) for separating the freezer discharge air passage (not shown) and the cooling chamber 110 is provided. In the cooling chamber 110, a cooler 112 is disposed, and in the upper space of the cooler 112, the cold air cooled by the cooler 112 by a forced convection method is stored in the refrigerator 104, the switching chamber 105, the ice making chamber 106, the vegetables. A cooling fan 113 for blowing air to the chamber 108 and the freezing chamber 107 is disposed.

  Further, a radiant heater 114 made of a glass tube is provided in the lower space of the cooler 112 for defrosting the frost and ice adhering to the cooler 112 and its surroundings during cooling, and further, the lower part is generated during the defrosting. A drain pan 115 for receiving defrosted water, a drain tube 116 penetrating from the deepest part to the outside of the warehouse are configured, and an evaporating dish 117 is configured outside the downstream side of the warehouse.

  The second partition wall 125 is made of a heat insulating material made of foamed polystyrene or the like for isolating the freezer compartment 107 and the vegetable compartment 108 and ensuring the heat insulation of each storage compartment.

  The operation of the refrigerator 100 and the moisture-sensitive moisture-permeable device 8 of the present embodiment configured as described above will be described below.

  First, the operation of the refrigeration cycle will be described. The refrigeration cycle is operated by a signal from a control board (not shown) according to the set temperature in the cabinet, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 109 is condensed to some extent by a condenser (not shown), and further, the side surface and rear surface of the heat insulation box body 101 which is the refrigerator body, and the front surface of the heat insulation box body 101. The refrigerant is condensed and liquefied while preventing condensation of the heat insulating box 101 via a refrigerant pipe (not shown) disposed in the frontage, and reaches a capillary tube (not shown). After that, the capillary tube is depressurized while exchanging heat with a suction pipe (not shown) to the compressor 109 to become a low-temperature and low-pressure liquid refrigerant and reaches the cooler 112.

  Here, the low-temperature and low-pressure liquid refrigerant is heat-exchanged with air in each storage chamber such as a freezing chamber discharge air passage (not shown) conveyed by the operation of the cooling fan 113, and the refrigerant in the cooler 112 is evaporated. . At this time, cool air for cooling each storage chamber in the cooling chamber 110 is generated. The low-temperature cold air is diverted from the cooling fan 113 to the refrigerating chamber 104, the switching chamber 105, the ice making chamber 106, the vegetable chamber 108, and the freezing chamber 107 using an air passage or a damper, and cooled to the respective target temperature zones. In particular, the vegetable compartment 108 is adjusted to 2 ° C. to 7 ° C. by distributing cold air by opening / closing dampers (not shown) in the air passage for supplying cold air or by ON / OFF operation of heaters (not shown). Has been.

  Next, a case where vegetables are actually put into the vegetable room 108 and stored will be described.

  First, the vegetable case main body 2 arranged in the vegetable compartment 108 is pulled out by pulling the door of the drawer-type vegetable compartment 108 forward. At this time, the vegetable case lid 3 remains on the main body side of the refrigerator 100 without being pulled out simultaneously with the vegetable case main body 2 by a rib (not shown) or the like standing in the vegetable compartment 108. For this reason, when the vegetable case 1 is pulled out, the vegetable case lid 3 is not present, so that the vegetables to be stored can be easily put into the vegetable case body 2.

  Furthermore, after putting vegetables into the vegetable case main body 2 arranged in the vegetable compartment 108, the vegetable case lid 3 left on the main body side of the refrigerator 100 is automatically sealed to the vegetable case main body 2 when the door of the vegetable compartment 108 is closed. The vegetable case main body 2 and the vegetable case lid 3 can be sealed when the door of the vegetable compartment 108 is closed. For this reason, the moisture evaporated from the vegetables stored in the vegetable case 1 is moisture and moisture permeable when the humidity is high in the moisture and moisture permeable membrane 4 of the moisture and moisture permeable device 8 attached to the vegetable case lid 3. When the humidity is low, the moisture permeation amount is reduced by the function of the moisture-sensitive moisture permeable membrane 4 so that the vegetable case 1 is kept in humidity.

  As described above, the moisture-sensitive moisture permeable membrane 4 allows the vegetable case main body 2 to be kept in a high-humidity state that is optimal for the preservation of vegetables without condensation, so that the freshness of the vegetables can be maintained for a long period of time. it can.

  In addition, this invention is not limited to the said embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.

  As described above, the moisture and moisture permeable membrane, moisture and moisture permeable device, vegetable case, and refrigerator according to the present invention are kept in a high humidity state while suppressing the occurrence of condensation, and when the fruits and vegetables are stored, there is no condensation. Since it can be preserved in the environment and kept fresh for a long period of time, it can be applied not only to a dedicated vegetable storage for home use or business use, but also to applications such as food distribution such as vegetables, warehouses, etc. .

DESCRIPTION OF SYMBOLS 1 Vegetable case 2 Vegetable case main body 3 Vegetable case cover 4 Moisture and moisture permeable membrane 5 Base material 5a Base material opening space 6 Regenerated cellulose 7 Non-woven fabric 8 Moisture and moisture permeable device 9 Frame 100 Refrigerator 101 Heat insulation box 101a Machine room 102 Outer box 103 Inner box 104 Refrigeration room 105 Switching room 106 Ice making room 107 Freezing room 108 Vegetable room 109 Compressor 110 Cooling room 111 Back partition wall 112 Cooler 113 Cooling fan 114 Radiant heater 115 Drain pan 116 Drain tube 117 Evaporating dish 125 Second partition wall

Claims (10)

  1. A moisture permeable and moisture permeable membrane comprising a substrate made of cellulose and regenerated cellulose held on the substrate, and the amount of the regenerated cellulose is 0.3 to 3.0 g based on the area of the substrate. / m 2 and is moisture-sensitive moisture permeable membrane.
  2. The moisture-permeable moisture-permeable membrane according to claim 1, wherein the density of the base material is 0.3 to 1.0 g / cm 3 .
  3.   The moisture-permeable and moisture-permeable membrane according to claim 1 or 2, wherein the base material is one of pulp, rayon, or a mixed paper of pulp and rayon.
  4.   The moisture-permeable and moisture-permeable membrane according to any one of claims 1 to 3, wherein the regenerated cellulose is solidified by acid treatment after coating or dipping viscose on a base material.
  5.   The moisture-permeable and moisture-permeable membrane according to claim 4, wherein the viscose has a viscose concentration of 20 to 50%.
  6.   The moisture-permeable and moisture-permeable membrane according to claim 4 or 5, wherein an antifungal agent is mixed with the viscose.
  7.   A moisture- and moisture-permeable device in which a nonwoven fabric having a shear strength stronger than that of the moisture and moisture permeable membrane is laminated on at least one surface of the moisture and moisture permeable membrane according to any one of claims 1 to 6.
  8.   The moisture and moisture permeable device according to claim 7, wherein a periphery of the moisture and moisture permeable membrane and the nonwoven fabric is fixed to a frame.
  9.   A vegetable case provided with the moisture-sensitive moisture-permeable device according to claim 8 on at least one surface.
  10.   A refrigerator equipped with the vegetable case according to claim 9.
JP2013104332A 2012-06-19 2013-05-16 Moisture and moisture permeable membrane, moisture and moisture permeable device, vegetable case, and refrigerator Active JP6209361B2 (en)

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JP2017509855A (en) * 2014-12-26 2017-04-06 チンダオ ハイアール ジョイント ストック カンパニー リミテッドQingdao Haier Joint Stock Co.,Ltd Moisture permeable device, refrigerator, and method of manufacturing moisture permeable device
JP2017533403A (en) * 2014-11-28 2017-11-09 チンタオ ハイアール ジョイント ストック カンパニー リミテッドQingdao Haier Joint Stock Co.,Ltd Freshness holding unit, storage box and refrigerator
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CN108708224A (en) * 2018-05-18 2018-10-26 山东恒联新材料股份有限公司 A kind of production technology of paper substrate viscose glue composite material
CN109764628A (en) * 2019-03-22 2019-05-17 合肥华凌股份有限公司 Drawer appliance and refrigeration equipment with it

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