JP3621856B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator that manages the storage environment of food stored in a refrigerator.
[0002]
[Prior art]
Managing the freshness of foods, typically fresh food, is important at home, regardless of food manufacturer or restaurant industry. However, the freshness management method at home is based on the expiration date specified by the food manufacturer, and the number of days is calculated based on the subjective sensory evaluation of each person, such as gloss, color, and fragrance. It is currently managed.
[0003]
Against this backdrop, a freshness management device has been proposed with a view to a refrigerator for storing food, and an example described in Japanese Patent No. 2875174 is known.
[0004]
The conventional freshness management apparatus will be described below with reference to the drawings.
[0005]
FIG. 14 is a functional block diagram of a conventional freshness management apparatus. In FIG. 14, reference numeral 1 denotes a freshness management device, a storage chamber 2 for storing vegetables, a detection sensor 3 that is provided in the storage chamber 2 and detects gas components and concentrations generated from vegetables and converts them into electrical signals; The freshness maintaining device 4 recovers and maintains the gas environment in the storage chamber 2 and the microprocessor 5 outputs a control signal of the freshness maintaining device 4 by an electric signal from the sensing sensor 3.
[0006]
The operation of the freshness management apparatus configured as described above will be described below.
[0007]
When the user stores vegetables in the storage chamber 2, the vegetables generate sulfur compound gases such as hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide and reducing gases from the vegetables themselves over time. Such gas combines with oxygen ions on the surface of the sensing sensor 3 to generate conduction electrons, which are input to the microprocessor 5 as an electronic signal, and a control signal is sent to the freshness maintaining device 4. Is to maintain the freshness of vegetables.
[0008]
[Problems to be solved by the invention]
However, in the above conventional configuration, when the gas components generated from the vegetables stored in the storage chamber 2 and the concentrations thereof change, the already stored vegetables are deteriorated in freshness. There was a drawback that the freshness maintaining device 4 could not be operated and its effect could not be fully exhibited.
[0009]
In addition, changes in gas components and concentrations generated from vegetables are affected by factors that are not related to freshness, such as differences in the amount of stored vegetables or when vegetables are purchased, and are generated from stored vegetables themselves. However, the configuration in which the freshness maintaining device 4 is controlled by detecting the concentration change of the gas to be used has a drawback that the influence cannot be removed.
[0010]
This invention solves the conventional subject, and before the freshness of vegetables falls, it aims at providing the refrigerator which improves storage environment beforehand and maintains freshness.
[0011]
[Means for Solving the Problems]
In order to achieve this object, the present invention has an electrical output from an atmosphere sensor that senses a concentration change of a composite gas component including a gas component generated from a stored item and a gas component flowing in from outside the room provided in a vegetable room. In addition, the composite gas removal means for removing the composite gas component in the vegetable compartment is driven and controlled.
[0012]
Thereby, before the freshness of the stored items in the vegetable room such as vegetables and fruits decreases, it is possible to remove both the gas component from the stored item itself and the gas component flowing in from the outside of the vegetable room, which cause deterioration of the freshness in advance. In addition, the freshness maintenance effect can be enhanced by accurately suppressing deterioration of freshness of the stored item without depending on only the gas component from the stored item itself.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention provides a vegetable room for storing stored items such as vegetables and fruits, and a gas component and vegetables generated from the stored items provided in a part of the upper air passage in the vegetable room. An atmosphere sensor that senses a change in concentration by reducing the oxygen in the air adsorbed on the surface of the sensing layer by a reducing gas of a composite gas component including a gas component flowing in from outside and reducing the electrical resistance; and the vegetable compartment In order to remove the composite gas component , the low temperature active catalyst that adsorbs and decomposes the reducing gas even at a low temperature is composed of a composite gas removing means arranged in the suction path of the blower in the refrigerator compartment. the composite gas in order to perform specific output on the basis of, purification of vegetable compartment of the storage material degradation reduces the reducing gas within the refrigeration compartment to be factors previously freshness deterioration progresses of forestall the freshness deterioration environment It is equipped with control means to drive and control the leaving means, before the freshness of the stored items in the vegetable room such as vegetables, fruits, etc., and the gas components from the stored items that cause deterioration of freshness and the inflow from the outside of the vegetable room The concentration state of both of the gas components to be monitored is monitored, and the composite gas removing means is driven to prevent the freshness deterioration of the stored items.
[0020]
According to a second aspect of the present invention, in the first aspect of the present invention, the control means is combined based on the electrical output of the atmosphere sensor that combines the concentration change of the composite gas component and the temperature change in the vegetable compartment. The gas removal means is driven and controlled, and the determination can be made based on the influence of the temperature environment other than the gas environment that affects the maintenance of the freshness of the stored items, and the freshness management with higher accuracy can be performed.
[0021]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the control means drives the composite gas removal means based on a relative difference in the peak value of the output voltage of the atmosphere sensor measured over time. The optimum timing for driving the composite gas removing means can be set with high accuracy.
[0022]
According to a fourth aspect of the present invention, in addition to the second or third aspect of the present invention, a temperature sensor is further provided in the vegetable compartment, and an output change value of the atmosphere sensor is determined in consideration of an output change of the temperature sensor. It is possible to prevent erroneous detection due to temperature fluctuations when opening and closing the door and taking in and out the vegetables, and it is possible to improve the accuracy of the timing for driving the composite gas removing means.
[0023]
The invention according to claim 5 is the invention according to any one of claims 2 to 4 , further comprising a humidity sensor in the vegetable room, and the output change value of the atmosphere sensor is determined by the humidity sensor. This is performed in consideration of the output change, and can prevent erroneous detection due to humidity fluctuations when the door is opened and closed or the stored item is stored, and the accuracy of the timing for driving the composite gas removing means can be improved.
[0025]
The invention according to claim 6 is the one according to claim 1, further comprising display means for displaying the driving state of the complex gas removing means, so that the driving state of the complex gas removing means can be understood at a glance. It is possible to give the user a sense of security that the function is operating and to enhance the appeal effect of the freshness maintenance function.
[0026]
【Example】
(Example 1)
1 is a cross-sectional view of a refrigerator according to a first embodiment of the present invention. FIG. 2: is the perspective view which looked at the atmosphere sensor of the refrigerator of the Example from the surface. FIG. 3 is a perspective view of the atmosphere sensor of the refrigerator of the embodiment as viewed from the back side. FIG. 4 is a functional block diagram illustrating a main part of the refrigerator according to the embodiment. FIG. 5 is an output voltage characteristic diagram of the atmosphere sensor of the refrigerator of the same example.
[0027]
In FIG. 1 to FIG. 3, reference numeral 6 denotes a refrigerator main body, and an insulating storage wall 7 forms an upper storage compartment 8 in the upper part and a lower storage compartment 9 in the lower part. Reference numeral 10 denotes a partition plate that divides the inside of the upper storage compartment 8 in a vertical direction. The refrigerator compartment 11 is formed in the upper portion, and the vegetable compartment 12 for storing vegetables, fruits and the like is formed in the lower portion. Reference numeral 13 denotes a hinge-type door attached to the front opening of the refrigerator compartment 11, and reference numeral 14 denotes a drawer-type door attached to the front opening of the vegetable compartment 12 to pull out the storage container 15 integrally.
[0028]
16 is a compressor of a refrigeration cycle provided at the lower rear of the refrigerator body 6, 17 is a first cooler provided in the upper storage section 8, and 18 is a first forcibly passing cold air generated in the first cooler 17. Reference numeral 1 denotes a blower, 19 denotes a second cooler provided in the lower storage section 9, and 20 denotes a second blower for forcibly passing the cold air generated by the second cooler 19.
[0029]
In addition, 21 is an air supply opening to the vegetable compartment 12 formed in front of the partition plate 10, 22 is an exhaust opening from the vegetable compartment 12 formed in the rear of the partition plate 10, and 23 is an air supply in the vegetable compartment 12. This is an air passage that leads from the port 21 to the exhaust port 22. Reference numeral 24 denotes an atmosphere sensor arranged in the air passage 23 at the upper part in the vegetable compartment 12.
[0030]
The atmosphere sensor 24 includes an electrode 26 having a surface formed on the surface of the substrate 25 and a sensing layer 27 formed on the electrode 26, and a planar heater 28 is provided on the back surface.
[0031]
The sensing layer 27 is formed by sintering a material mainly composed of tin oxide, for example, and oxygen in the air in which a reducing gas mainly composed of ethylene, alcohol-based gas, aldehyde-based gas, etc. is adsorbed on the surface of the sensing layer 27. It is configured to detect a change in the concentration of the reducing gas by decreasing the electric resistance.
[0032]
Reference numeral 29 denotes a low-temperature active catalyst disposed in the suction path of the first blower 18 in the refrigerator compartment 11. The low temperature active catalyst 29 is configured to support manganese dioxide, magnesium, etc. on a carrier such as alumina, silica, zeolite, etc., and to adsorb and decompose the reducing gas even at a low temperature such as a refrigerator.
[0033]
In FIG. 4, reference numeral 30 denotes a control means composed of a microcomputer, and an electric signal from an atmosphere sensor 24 that changes the electric resistance due to a change in the concentration and temperature of a composite gas such as ethylene, alcohol or aldehyde is input to the input side. The output side is connected with a composite gas removing means 32 and a display means 33 comprising a rotation speed varying means 31 and a first blower 18.
[0034]
The complex gas removing means 32 is configured to increase the rotation speed of the first blower 18 with the rotation speed variable means 31 based on a signal from the control means 30 and promote ventilation in the vegetable compartment 12. Further, the display means 33 is composed of a liquid crystal panel or the like, and is attached to the surface of the door 13 of the refrigerating room, and reports the driving status of the composite gas removing means 32 to the user.
[0035]
The operation of the refrigerator configured as described above will be described below based on a characteristic diagram showing a change in output voltage of the atmosphere sensor 24 of FIG.
[0036]
First, when stable, gas generated from stored items such as vegetables and fruits stored in the storage container 15 of the vegetable room 12 and gas generated from various foods stored in the refrigerator room 11 are first. As a result of the forced convection action of the blower 18 in the vegetable compartment 12, reducing vegetables such as ethylene, ethanol, and acetaldehyde are present in the vegetable compartment 12.
[0037]
And the output voltage of the atmosphere sensor 24 is the temperature change by ON / OFF of the compressor 16, the intrusion of the outside air by opening and closing the doors 14 and 13 of the vegetable room and the refrigerator room, and the temperature fluctuation due to the defrosting of the first cooler 17. While repeating a waveform having a peak when rising, the level changes according to the concentration of the reducing gas at that time.
[0038]
Next, at time point x, for example, a lot of fruits such as apples and bananas are stored in the vegetable room 12, or side dishes using liquor for cooking, wine, vinegar, fermented seasonings, etc. are stored in the refrigerator room 11. If a large amount is stored, the freshness of the stored items in the vegetable compartment 12 directly in the vegetable compartment 12 from the inside of the storage container 15 and indirectly from the inside of the refrigerator compartment 11 by forced circulation by the first blower 18. It is filled with reducing gases such as ethylene, ethanol, and acetaldehyde that degrade the water.
[0039]
For this reason, the oxygen in the air adsorbed on the surface of the tin oxide forming the sensing layer 27 of the atmosphere sensor 24 is reduced by the reducing gas described above, and the reducing gas in which the electrical resistance of the atmosphere sensor 24 is lowered and the output voltage is increased. Rises depending on the concentration of.
[0040]
Then, the output voltage after the rise changes in a waveform in which the peak of the temperature rise is repeated in accordance with the above various temperature fluctuation factors as in the stable state.
[0041]
Therefore, if the magnitude of the output voltage rise width y at the peak time point “a” immediately before the output voltage rise of the atmosphere sensor 24 and the peak b time point immediately after the output voltage rise is larger than a predetermined output voltage rise width, the control is performed. The means 30 is judged to be in an environment where the reducing gas concentration is high and the ambient temperature is also high and the freshness of the stored items stored in the vegetable compartment 12 is deteriorated. The rotational speed of the blower 18 is increased to promote air convection in the vegetable compartment 12 and the remaining reducing gas is discharged to the outside.
[0042]
On the other hand, the display information is sent from the control means 30 to the display means simultaneously with the driving of the composite gas removing means 32, and the composite gas removing means 32 is operating on the liquid crystal panel by, for example, an image diagram or an animation. Make the user visually recognize that the conversion is in progress.
[0043]
Then, the reducing gas discharged from the vegetable compartment 12 returns to the refrigerator compartment 11 and is adsorbed by the low temperature active catalyst 29 to be oxidatively decomposed. For this reason, the reducing gas density | concentration which degrades the freshness of the stored thing in the vegetable compartment 12 falls, the oxygen adsorption amount of the tin oxide surface of the sensing layer 27 of the atmosphere sensor 24 increases again, and output voltage falls. When the voltage drops below a predetermined output voltage set in advance, the control means 30 determines that the reducing gas concentration is low and the environment that deteriorates the freshness of the stored items stored in the vegetable compartment 12 has been released, and the complex gas removal is performed. The drive of the means 32, that is, the high rotational speed operation state of the first blower 18 is released.
[0044]
In order to ensure the stability of the system, it is also effective to release the driving of the complex gas removing means 32 after the driving, for example, to temporarily stop after a predetermined time has elapsed.
[0045]
At the same time, the display of the operation of the complex gas removing means 32 in the display means 33 is ended, and the user is made aware that the cleaning in the vegetable compartment 12 has ended.
[0046]
As described above, according to the present embodiment, the freshness is detected by detecting the concentrations of the sulfur compound gas and reducing gas generated from the stored contents of the vegetable compartment 12 as the freshness deteriorates as in the conventional example. Unlike what drives a maintenance device, it reduces the reducing gas that becomes a factor of freshness deterioration before the deterioration of the contents in the vegetable room 12 progresses, and purifies the freshness deterioration environment in advance. The effect of maintaining the freshness of the stored items in the vegetable room 12 is enhanced, and the freshness maintenance period can be extended. For this reason, the food storage management economical to the user can be performed.
[0047]
In addition, it is possible to make judgments including the effects of freshness-degrading gas components such as alcohols and aldehydes generated from the items stored in the refrigerator compartment 11 and the effects of temperature rises other than gases. Can improve the accuracy of freshness management.
[0048]
Further, if the determination of the driving or stopping of the complex gas removing means 32 is made based on the absolute value of the output voltage of the atmosphere sensor 24 measured over time, for example, when there are few items in the vegetable compartment 12, the detection level is reached. Although it is conceivable that the system does not operate even when it is difficult to reach and necessary, the composite gas removing means 32 is determined regardless of the amount of stored items by making a determination based on the relative difference in the peak value of the output voltage as in this embodiment. Can be driven accurately at the optimal time.
[0049]
In addition, the atmosphere sensor 24 is provided in the vicinity of the top surface of the vegetable compartment 12 in order to improve the detection of reducing gas having high volatility and low specific gravity, and is disposed in a ventilation path that convects the vegetable compartment 12. By doing so, the target gas can be sensed efficiently. If the atmosphere sensor 24 protrudes slightly downward from the top structure of the vegetable compartment 12, the detection accuracy is further improved.
[0050]
Further, since the display means 33 for displaying the driving state of the complex gas removing means 32 is provided, the operation state of the cleaning in the vegetable room 12 can be seen at a glance, giving the user a sense of security that the function is operating. The appeal effect of the freshness maintaining function can be enhanced. In addition, the operating status can be used as a warning to the user about what is stored in the refrigerator and how to use the temperature, and the functional value of the refrigerator can be further enhanced by enlightening the correct usage.
[0051]
(Example 2)
FIG. 6 is a cross-sectional view of a refrigerator according to Embodiment 2 of the present invention. FIG. 7 is a functional block diagram showing a main part of the refrigerator according to the embodiment. 6 and 7, reference numeral 34 denotes a temperature sensor provided in a part of the vegetable compartment 12, which is configured to input temperature information in the vegetable compartment 12 to the control means 30. For example, the temperature sensor 34 increases in temperature. When the temperature is steep above a predetermined value, it is regarded as a temporary temperature rise, and even if the output voltage of the atmosphere sensor 24 rises above a predetermined value, the composite gas removing means 32 is not driven immediately and is set in a standby state. It is configured to make a determination again after a lapse of a predetermined time.
[0052]
In the configuration as described above, although the concentration of the freshness-deteriorating gas is not at a problem level, the atmosphere sensor 24 temporarily peaks due to opening of the vegetable room door 14 or insertion of new uncooled storage. Even if it rises steeply, the control means 30 determines that this is a temporary temperature effect and does not drive the composite gas removal means 32, thereby preventing erroneous detection due to temperature fluctuations and driving the composite gas removal means 32. Accuracy can be increased.
[0053]
(Example 3)
FIG. 8 is a cross-sectional view of a refrigerator according to Embodiment 3 of the present invention. FIG. 9 is a functional block diagram showing a main part of the refrigerator according to the embodiment. 8 and 9, reference numeral 35 denotes a humidity sensor provided in a part of the vegetable compartment 12, which is configured to input humidity information in the vegetable compartment 12 to the control means 30. When the temperature is steep above a predetermined value, it is regarded as a temporary increase in humidity, and even if the output voltage of the atmosphere sensor 24 rises above a predetermined value, the composite gas removal means 32 is not driven immediately and is set in a standby state. It is configured to make a determination again after a lapse of a predetermined time.
[0054]
In the configuration as described above, although the concentration of the freshness deteriorated gas is not at a problem level, the peak of the atmosphere sensor 24 temporarily occurs due to the opening of the door 14 of the vegetable room or the introduction of a new storage with a lot of moisture transpiration. Even if it rises steeply, the control means 30 determines that this is a temporary humidity effect and does not drive the composite gas removal means 32, thereby preventing erroneous detection due to humidity fluctuations and driving the composite gas removal means 32. Accuracy can be increased.
[0055]
(Example 4)
FIG. 10 is a sectional view of a refrigerator according to Example 4 of the present invention. FIG. 11 is a functional block diagram showing a main part of the refrigerator according to the embodiment. 10 and 11, reference numeral 36 denotes a photocatalyst made of, for example, titanium oxide disposed in the suction path of the first blower 18 in the refrigerator compartment 11, and 37 is provided in the vicinity of the photocatalyst 36, and the photocatalyst 36 is irradiated with ultraviolet rays. It is a light irradiation means such as a fluorescent lamp for irradiating light including a wavelength. The light irradiation means 37 is configured to operate based on the output signal of the control means 30.
[0056]
In the configuration as described above, the reducing gas discharged from the vegetable compartment 12 by driving the composite gas removing means 32 returns to the refrigerator compartment 11 and is adsorbed on the catalyst layer of the photocatalyst 36. When the light of the light irradiation means 37 is irradiated in a timely manner and the ultraviolet rays reach the photocatalyst 36, the catalyst layer is activated, and the adsorbed reducing gas components such as ethylene, ethanol, acetaldehyde and the like are harmless components such as water and carbon dioxide. Oxidative decomposition. For this reason, the reducing gas density | concentration which degrades the freshness of the stored item in the vegetable compartment 12 can be reduced.
[0057]
Further, when the light irradiation means 37 emits light during the decomposition operation of the freshness deteriorated gas, it is possible to appeal to the user that the cleaning operation is being performed, and to enhance the sense of security for the user and the appeal of the function as a product. be able to.
[0058]
Note that the photocatalyst 36 may be formed by being formed into a honeycomb shape in the suction path of the blower 18 or may be applied and processed by expanding the area of a structure such as a duct that forms the suction path. Further, it is reasonable to share the light irradiating means 37 with the illuminating means in the refrigerating room 11, and it is economical.
[0059]
(Example 5)
FIG. 12 is a cross-sectional view of a refrigerator according to Embodiment 5 of the present invention. FIG. 13: is a functional block diagram which shows the principal part of the refrigerator by the Example. 12 and 13, 38 is a photocatalyst made of, for example, titanium oxide disposed in the upper part of the vegetable compartment 12, and 39 is provided in the vicinity of the photocatalyst 38 to irradiate the photocatalyst 38 with light including an ultraviolet wavelength. For example, light irradiation means such as an ultraviolet lamp. The photocatalyst 38 and the light irradiation means 39 constitute a composite gas removing means 40. The complex gas removing means 40 is configured to operate based on the output signal of the control means 30.
[0060]
In the configuration as described above, when the increase value of the output voltage of the atmosphere sensor 24 becomes a predetermined value or more and an operation command for the composite gas removing means 40 is issued by the control means 30, the photocatalyst 38 is irradiated with ultraviolet rays from the light irradiation means 39. Then, the reducing gas in the vegetable compartment 12 adsorbed on the catalyst layer of the photocatalyst 38 is oxidatively decomposed. For this reason, the reducing gas density | concentration which degrades the freshness of the stored thing in the vegetable compartment 12 can be reduced more directly, and a freshness degradation environment can be purified reliably.
[0061]
【The invention's effect】
As described above, the invention according to claim 1 is a gas component that is provided in a portion of a vegetable room for storing stored items such as vegetables and fruits and an air passage in the upper part of the vegetable chamber and is generated from the stored items. And an atmospheric sensor that senses a concentration change by reducing the electric resistance by reducing oxygen in the air adsorbed on the surface of the sensing layer by a reducing gas of a composite gas component including a gas component flowing in from outside the vegetable room, and In order to remove the complex gas component in the vegetable compartment, it comprises a complex gas removal means in which a low-temperature active catalyst that adsorbs and decomposes the reducing gas even at low temperatures is arranged in the suction path of the blower in the refrigerator compartment, and from the atmosphere sensor an electrical output based on the degradation of vegetable compartment of the storage material is to reduce the reducing gas within the refrigeration compartment to be factors previously freshness deterioration progresses before in order to perform the purification of freshness deterioration environment in advance Since the control means for driving and controlling the complex gas removal means is provided, before the freshness of the stored items such as vegetables and fruits in the vegetable room decreases, the outdoor inflow gas that causes deterioration of freshness in addition to the gas components from the stored items themselves The composite gas removing means is driven based on the concentration of both components to suppress the deterioration of freshness of the stored items, and the freshness maintenance period can be extended.
[0068]
According to a second aspect of the present invention, in the first aspect of the invention, the control means is based on the electrical output of the atmosphere sensor that combines the concentration change of the composite gas component and the temperature change in the vegetable compartment. In addition, since the composite gas removing means is driven and controlled, the determination can be made in consideration of the influence of the temperature environment other than the gas environment that affects the maintenance of the freshness of the stored items, and the freshness management with higher accuracy can be realized.
[0069]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the control means is a composite gas removing means based on a relative difference in the peak value of the output voltage of the atmosphere sensor measured over time. Therefore, the optimum time for driving the complex gas removing means can be accurately set regardless of the storage conditions in the vegetable compartment.
[0070]
The invention according to claim 4 is the invention according to claim 2 or claim 3 , further comprising a temperature sensor in the vegetable compartment, and the output change value of the atmosphere sensor is determined based on the output change of the temperature sensor. Since it is performed in consideration, it is possible to prevent erroneous detection due to temperature fluctuations when opening and closing the door and taking in and out the vegetables, and it is possible to improve the accuracy of the timing for driving the composite gas removing means.
[0071]
Further, the invention according to claim 5 is the invention according to any one of claims 2 to 4 , further comprising a humidity sensor in the vegetable room, wherein the output change value of the atmosphere sensor is determined by the humidity. Since it is performed in consideration of the output change of the sensor, it is possible to prevent erroneous detection due to humidity fluctuations when opening and closing the door or storing the stored item, and to improve the accuracy of the timing for driving the composite gas removing means.
[0073]
In addition, the invention described in claim 6 is provided with display means for displaying the driving state of the complex gas removing means in addition to the invention described in claim 1, and the driving state of the complex gas removing means is at a glance. This gives the user a sense of security that the function is operating, and can enhance the appeal effect of the freshness maintenance function.
[Brief description of the drawings]
1 is a cross-sectional view of a first embodiment of a refrigerator according to the present invention. FIG. 2 is a front perspective view of an atmosphere sensor of the refrigerator of the first embodiment. FIG. 3 is a rear perspective view of an atmosphere sensor of the refrigerator of the first embodiment. FIG. 5 is a functional block diagram of the refrigerator atmosphere sensor according to the embodiment. FIG. 6 is a cross-sectional view of the refrigerator according to the second embodiment of the present invention. Functional block diagram [FIG. 8] A cross-sectional view of a refrigerator according to a third embodiment of the present invention. [FIG. 9] A functional block diagram of a refrigerator according to the same embodiment. [FIG. 10] A cross-sectional view of a refrigerator according to a fourth embodiment of the present invention. Functional block diagram of the refrigerator according to the embodiment. FIG. 12 is a sectional view of the refrigerator according to the fifth embodiment. FIG. 13 is a functional block diagram of the refrigerator according to the embodiment. [Explanation of symbols]
11 Refrigerated room (storage room)
12 Vegetable room 23 Air passage 24 Atmosphere sensor 29 Catalyst 30 Control means 32 Compound gas removal means 33 Display means 34 Temperature sensor 35 Humidity sensor 36 Photocatalyst 37 Light irradiation means 38 Photocatalyst 39 Light irradiation means 40 Compound gas removal means

Claims (6)

A composite gas component including a vegetable room storing stored items such as vegetables and fruits, and a gas component generated from the stored item and a gas component flowing from outside the vegetable room provided in a portion of the upper air passage in the vegetable room In order to remove the complex gas component in the vegetable compartment, the atmospheric sensor that detects the concentration change by reducing the electric resistance by reducing the oxygen in the air adsorbed on the surface of the sensing layer by the reducing gas of However, it consists of complex gas removal means that arranges a low-temperature active catalyst that adsorbs and decomposes reducing gas in the suction path of the blower in the refrigerator compartment, and the stored items in the vegetable compartment based on the electrical output from the atmosphere sensor control means for controlling driving the composite gas removal means in order to perform the previously reduce refrigeration compartment of the reducing gas becomes a factor of freshness deterioration deterioration of travels purifying freshness deterioration environment in advance Refrigerator, characterized in that was example. The control means drives and controls the composite gas removal means based on an electrical output of an atmosphere sensor that combines a temperature change in the vegetable compartment in addition to a change in the concentration of the composite gas component. refrigerator. The refrigerator according to claim 1 or 2 , wherein the control means drives and controls the complex gas removal means based on a relative difference in the peak value of the output voltage of the atmosphere sensor measured over time. The refrigerator according to claim 2 or 3 , wherein a temperature sensor is provided in the vegetable room, and the output change value of the atmosphere sensor is determined in consideration of the output change of the temperature sensor. The refrigerator according to any one of claims 2 to 4 , wherein a humidity sensor is provided in the vegetable room, and the output change value of the atmosphere sensor is determined in consideration of the output change of the humidity sensor. . The refrigerator according to claim 1, further comprising display means for displaying a driving state of the complex gas removing means.

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