JP3699194B2 - Electrical control device for deodorizer attached to cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention removes odor components (for example, amines, hydrogen sulfide, aldehydes, ammonia, ethyl mercaptan, etc.) contained in air in a refrigerator or indoors where people enter and exit by oxidative decomposition (combustion) with a catalyst. The present invention relates to an oxidative decomposition type deodorizing apparatus.
[0002]
[Prior art]
As one of the oxidative decomposition type deodorizing apparatuses, a casing having an inlet and an outlet, a catalyst provided inside the casing, and a heating element that is disposed in proximity to or in contact with the catalyst and generates heat when energized are provided. For example, Japanese Patent Laid-Open No. 4-114720 discloses.
[0003]
[Problems to be solved by the invention]
By the way, in the deodorizing apparatus described in the above publication, the heated air after the odor components are removed by oxidative decomposition is discharged as it is. Therefore, when the deodorizing apparatus is used in a refrigerator, for example, a refrigerator freezer When the deodorizing device is used in, for example, a room where a person goes in and out, there is a problem that the temperature in the room rises.
[0004]
Such a problem is that, as the applicant previously proposed in Japanese Patent Application No. 8-43734, a cooler of a refrigeration apparatus is provided at the outlet of the casing, and the air discharged through the outlet is cooled. However, since the heating element controlled by the electric control device and the refrigeration apparatus are both devices with high power consumption, energization of the heating element and the refrigeration are possible. In order to prevent problems from occurring even if the start-up of the device (current used temporarily increases) is obtained at the same time, a large power source capacity and a breaker for high current are required. A great equipment cost is required.
[0005]
[Means for Solving the Problems]
The present invention has been made to provide a deodorizing device that can be operated without trouble by a generally used small- capacity power supply facility , and a cooler that cools the inside of a refrigerator or the like during cooling operation of the refrigeration device A catalyst having a deodorizing function provided inside a casing disposed adjacent to the heating element, a heating element that generates heat by energizing the catalyst and heats the air, and air that has been deodorized by heating the catalyst by sucking air in the cabinet. In a deodorizing apparatus including a blowing unit that circulates air in a cabinet so as to be blown toward the cooler, a temperature detection unit that detects a heating temperature of the catalyst, and in response to a detection signal of the temperature detection unit Power supply control means for controlling power supply to the heating element so that the heating temperature of the catalyst is maintained within a predetermined temperature range defined by a predetermined upper limit set temperature and a lower limit set temperature; The cooling operation of the refrigeration apparatus is stopped only when the catalyst is heated by energizing the heating element under the control of the apparatus, and when the heating temperature of the catalyst is maintained in the temperature range, The present invention provides an electrical control device for a deodorizing device attached to a cooler, characterized by comprising a cooling operation control means for continuing the cooling operation.
[0006]
[Operation and effect of the invention]
According to the electrical control device configured as described above, when the catalyst is heated by energizing the heating element, the cooling operation of the refrigeration apparatus is stopped under the control of the cooling operation control means, and the catalyst Since the cooling operation of the refrigeration apparatus is continued under the control of the cooling operation control means when the heating temperature of the refrigeration apparatus is maintained in the temperature range, the heating element is energized and the refrigeration apparatus is supplied with power. It is not done at the same time, and does not require a circuit breaker for a large power capacity and a large current. Can be activated (without activation of the circuit breaker).
[0007]
In carrying out the present invention, in the above electric control device, the temperature sensing means for detecting the temperature of the air cooled and circulated into the cabinet by the cooler, and under the control of the power feeding control means, When the catalyst is heated by energizing the heating element and the temperature of the air detected by the temperature sensing means rises to a predetermined temperature, the energization to the heating element is disabled and the refrigeration apparatus is started to determine the predetermined temperature. It is desirable to further provide means for enabling energization of the heating element after a lapse of time.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a deodorizing apparatus according to the invention of claim 1. This deodorizing apparatus A1 is of an oxidative decomposition type that oxidatively decomposes and removes odor components contained in air. A casing 11 having a suction port 11 a and a discharge port 11 b, a noble metal catalyst 12, an electric heater 13 and temperature sensing cylinders 14, 15 assembled in the casing 11, and a suction port 11 a of the casing 11. And a refrigerator 51 (which is electrically operated by the electric control device 30) constituting the refrigeration apparatus 50 by the cooler 51 assembled to the discharge port 11b of the casing 11 and the fan motor 16 attached thereto. (ON / OFF controlled) 50a.
[0010]
The casing 11 is provided with a suction port 11a for sucking air containing odor components at the bottom, and is provided with a discharge port 11b for discharging air after deodorizing the odor components at the lower side, and the inside is a partition plate 17. As a result, the first chamber R1 in which the suction port 11a is opened and the discharge port 11b are opened and partitioned into a second chamber R2 that communicates with the upper portion of the first chamber R1 in the upper part.
[0011]
The noble metal-based catalyst 12 is attached to the casing 11 and the partition plate 17 via a bracket 18 at the approximate center of the first chamber R1, and is known per se. It has a honeycomb shape with a 2.5 mm opening, and cordierite, γ-alumina, nickel, chromium-based ribbon, foam metal, mesh, etc. are used as the carrier, and platinum, palladium, rhodium, etc. as active substances for these carriers The noble metal is supported by a single element or a mixture of two elements.
[0012]
The electric heater 13 is a heating element that mainly heats the catalyst 12 and has a meandering shape as shown in detail in FIG. 3. The electric heater 13 is attached to the casing 11 on the suction port 11 a side from the catalyst 12. 12 (closed to the catalyst 12 may be carried out). The fan motor 16 is a blowing unit that blows air containing odor components toward the electric heater 13 and the catalyst 12, and is provided in the suction port 11a and is assembled to the casing 11 via a bracket (not shown). ing.
[0013]
The temperature sensing cylinder 14 is provided closer to the catalyst 12 on the discharge port 11b side than the catalyst 12, and indirectly detects the temperature of the catalyst 12 by detecting the temperature of the air closest to the catalyst 12. ing. Further, as shown in FIG. 4, the temperature controller 31 in the electric control device 30 connected to the temperature sensing cylinder 14 is incorporated in the electric circuit of the electric heater 13, the fan motor 16, and the refrigerator unit 50a. When the temperature T detected by the temperature sensing cylinder 14 reaches the upper limit set temperature TH, the heater electric circuit (hereinafter simply referred to as the heater circuit) is opened and the fan motor electric circuit (hereinafter simply referred to as the fan circuit) and the refrigerator unit electric The circuit (hereinafter simply referred to as a unit circuit) is closed, and the temperature T is the lower limit temperature TL (the temperature at which the odor component of air is completely oxidized and removed by the catalyst 12, that is, the lower limit value of the complete catalyst reaction temperature ( Depending on the type of catalyst, it is about 200-300 ° C). When the temperature reaches a lower temperature, the fan circuit and unit circuit are opened and the heater circuit is turned on. The upper limit set temperature TH and the lower limit set temperature TL can be changed as appropriate.
[0014]
The temperature sensing cylinder 15 is provided in the discharge port 11b and detects the temperature of the exhaust air. Further, as shown in FIG. 4, the temperature controller 32 in the electric control device 30 connected to the temperature sensing cylinder 15 is for preventing abnormal overheating of the catalyst 12, and is an electric circuit of the electric heater 13. The heater circuit is closed when the temperature of the exhaust air is lower than the allowable temperature, and is opened when the temperature of the exhaust air is higher than the allowable temperature. The allowable temperature can be changed as appropriate. The allowable temperature at which the temperature controller 32 is opened is a temperature generated when the catalyst 12 is abnormally overheated, and does not appear during the normal operation shown in FIG.
[0015]
The electric control device 30 is electrically connected to the electric heater 13, the temperature sensitive cylinders 14 and 15, the fan motor 16 and the refrigerator unit 50 a, and the electric control device 30 energizes the electric heater 13, Each operation of the refrigerator unit 50a is controlled. The refrigerator unit 50a is configured without the cooler 51 of the conventionally known refrigeration apparatus 50, and includes an electric compressor, a condenser, an electric cooling fan for the condenser, a dryer, a capillary tube, and the like (not shown). Yes.
[0016]
In the deodorizing apparatus A1 configured as described above, in the electric circuit shown in FIG. 4, the temperature controller 31 closes the electric circuit of the electric heater 13, and the electric circuit common to the fan motor 16 and the refrigerator unit 50a is used. In the state where the temperature controller 32 is open and the electric circuit of the electric heater 13 is closed (for example, at room temperature), if the power switch (not shown) is turned on to start use, the electric heater 13 is energized. Is started, and the catalyst 12 is heated. As a result, the temperature (temperature of the catalyst 12) T detected by the temperature sensing cylinder 14 rises toward the upper limit set temperature TH as shown in FIG.
[0017]
Thus, when the temperature T detected by the temperature sensing cylinder 14 rises to the upper limit set temperature TH, the temperature controller 31 opens the electric circuit of the electric heater 13 and closes the electric circuit of the fan motor 16 and the refrigerator unit 50a. For this reason, when the energization of the electric heater 13 is cut off, the temperature T detected by the temperature sensing cylinder 14 falls toward the lower limit set temperature TL, and when the temperature T reaches the lower limit set temperature TL, the temperature controller 31 closes the electric circuit of the electric heater 13 and opens the electric circuit of the fan motor 16 and the refrigerator unit 50a. Thereafter, energization to the electric heater 13 is resumed, and the temperature T detected by the temperature sensing cylinder 14 rises again toward the upper limit set temperature TH. This rise and fall of the temperature T within the set temperature range is repeated until the power switch is turned off, and the temperature T is maintained within the set temperature range.
[0018]
During the above-described operation, when the temperature T detected by the temperature sensing cylinder 14 decreases from the upper limit set temperature TH toward the lower limit set temperature TL (the temperature controller 31 opens the heater circuit and closes the fan circuit and the unit circuit). When the fan motor 16 is activated and the refrigerator unit 50a is activated, the air containing the odorous component in the space where the deodorizing apparatus A1 is disposed is supplied from the intake port 11a to the first chamber R1. The odorous component is completely oxidized and removed by the heated catalyst 12, and the odorous component-removed air flows from the first chamber R1 to the second chamber R2. Then, the air is discharged from the discharge port 11b through the cooler 51 as indicated by the arrow.
[0019]
By the way, at this time, the refrigerator unit 50a is operating and the refrigeration apparatus 50 is operating, and the air discharged from the discharge port 11b (the air heated by the heat generated by the electric heater 13 and the reaction heat generated by oxidative decomposition). ) Is cooled by the cooler 51 and discharged. Accordingly, an increase in the load on the refrigerator refrigeration apparatus when the deodorizing apparatus A1 is used, for example, in a refrigerator can be suppressed, and the room temperature when the deodorizing apparatus A1 is used, for example, in a room where people go in and out. Can be suppressed.
[0020]
As is clear from the above description, the cooling operation of the refrigeration apparatus 50 is stopped only when the catalyst 12 is heated by energizing the electric heater 13, and the temperature T is set by the electric control apparatus 30 to the set temperature range (lower limit set temperature TL and in the state of being maintained at a temperature range) between the upper limit set temperature TH, since the cooling operation of the refrigeration system 50 is continued, without power supply to the energization and refrigeration system 50 to the electric heater 13 can be simultaneously obtained, There is no need for a large power source capacity and a large current circuit breaker, and the deodorizing device A1 can be operated without any trouble using a generally used small capacity power source facility (activates a generally used small current circuit breaker). Can be activated)
[0021]
6 to 8 show an embodiment of the deodorizing apparatus according to the invention of claim 2. In this deodorizing apparatus A2, ON / OFF control of the refrigerator unit 50a is performed by the temperature controller 33, The electrical circuit of the timer unit 34 and the relay 35 are connected in parallel to the electrical circuit of the machine unit 50a, the normally closed timer contact 34a is connected in series to the electrical circuit of the relay 35, and the normally closed relay contact 35a is electrically heated. Except for being connected in series to the electric circuit of the heater 13, the configuration is substantially the same as the embodiment shown in FIGS. 1 to 5.
[0022]
The temperature controller 33 is connected to the temperature sensing cylinder 19 provided on the discharge side of the cooler 51, and closes the electric circuit of the refrigerator unit 50a when the temperature detected by the temperature sensing cylinder 19 is equal to or higher than the set temperature. At the same time, when the temperature is lower than the preset temperature, the electric circuit of the refrigerator unit 50a is opened, and the preset temperature can be changed as appropriate. The timer 34 starts timing by energization start (closing operation of the temperature controller 33), and opens the normally-closed timer contact 34 after a predetermined time elapses, and keeps the energization end (temperature controller 33). The above-mentioned predetermined time is a time until the use current is stabilized in consideration of the fact that the use current at the start of the refrigeration apparatus 50 temporarily increases and then stabilizes. It is determined based on. The relay 35 opens the normally closed relay contact 35a by energization and keeps it open and disables the energization of the electric heater 13, and keeps the relay contact 35a closed when not energized. The heater 13 can be energized.
[0023]
In the deodorizing apparatus A2 configured as described above, in the electric circuit shown in FIG. 7, the temperature controller 31 closes the electric circuit of the electric heater 13 and opens the electric circuit of the fan motor 16. When the electric circuit of the electric heater 13 is closed and the temperature controller 33 opens the common electric circuit of the refrigerator unit 50a, the timer 34, and the relay 35, the power switch (not shown) is turned on to start use. Then, the energization of the electric heater 13 is started and the catalyst 12 is heated, whereby the temperature (temperature of the catalyst 12) T detected by the temperature sensing cylinder 14 as shown in FIG. 8 becomes the upper limit set temperature TH. Ascend towards.
[0024]
Thus, when the temperature T detected by the temperature sensitive cylinder 14 reaches the upper limit set temperature TH, the temperature controller 31 opens the electric circuit of the electric heater 13 and closes the electric circuit of the fan motor 16. For this reason, energization to the electric heater 13 is cut off, the temperature T detected by the temperature sensing cylinder 14 decreases toward the lower limit set temperature TL, and the fan motor 16 is operated. When the temperature T detected by the temperature sensing cylinder 14 reaches the lower limit set temperature TL, the temperature controller 31 closes the electric circuit of the electric heater 13 and opens the electric circuit of the fan motor 16. For this reason, energization to the electric heater 13 is resumed, the temperature T detected by the temperature sensing cylinder 14 rises again toward the upper limit set temperature TH, and the operation of the fan motor 16 is stopped. This rise and fall of the temperature T within the set temperature range is repeated until the power switch is turned off, and the temperature T is maintained within the set temperature range.
[0025]
In the above operation, when the temperature falls from the upper limit set temperature TH toward the lower limit set temperature TL (when the temperature controller 31 opens the heater circuit and closes the fan circuit), the fan motor 16 is operated. The air containing the odor component in the space where the deodorizing apparatus A2 is disposed is drawn into the first chamber R1 from the suction port 11a and flows toward the catalyst 12, and the odor component is heated in the heated catalyst 12. The air that has been completely oxidatively decomposed and removed, and from which the odor component has been removed flows from the first chamber R1 to the second chamber R2, and is blown and discharged from the discharge port 11b through the cooler 51 as indicated by arrows.
[0026]
Further, at the time of the above operation, when the temperature detected by the temperature sensing cylinder 19 rises to the set temperature (the fan motor 16 is stopped at this time, the heating by the electric heater 13 causes the suction port 11a to change to the discharge port 11b. In the case where heated air is discharged through the cooler 51 that does not perform the cooling function due to the natural flow of air and the temperature detected by the sensitive cylinder 19 rises to the set temperature), the temperature controller 33 is connected to the refrigerator unit 50a. The electric circuit of the timer 34 and the relay 35 is closed, thereby energization of the refrigerator unit 50a, the timer 34, and the relay 35 is started. At the same time when the refrigeration apparatus 50 is started, the relay contact 35a is opened and the electric heater 13 is connected. When the energization is disabled and the elapsed time after the temperature controller 33 is closed reaches a predetermined time, the timer contact 34a is opened and the relay 3 Energization of the is blocked, whereby the relay contact 35a is possible to energization of the electric heater 13 is closed.
[0027]
As described above, in the deodorizing apparatus A2, since the energization of the electric heater 13 is disabled for a predetermined time when the refrigeration apparatus 50 is started, the electric heater is used when the refrigeration apparatus 50 is started while the electric heater 13 is energized. The energization to the electric heater 13 is cut off for a predetermined time, and the electric heater 13 is not energized and the refrigeration apparatus 50 is started at the same time. A large power source capacity and a breaker for large current are not required and are generally used. The deodorizing apparatus A2 can be operated without hindrance using electrical equipment with a small power source capacity. The operation of the refrigeration apparatus 50 is stopped when the temperature regulator 33 opens the electric circuit of the refrigerator unit 50a, the timer 34, and the relay 35 when the temperature detected by the sensitive cylinder 19 falls below the set temperature. .
[0028]
In each of the above embodiments, the present invention was implemented using the noble metal-based catalyst 12, but it is also possible to employ a catalyst other than the noble metal-based catalyst when implementing the present invention. Further, in each of the above embodiments, the present invention has been implemented by adopting the electric heater 13 as a heating element arranged close to or in contact with the catalyst 12, but the configuration of the electric heater is appropriately changed and implemented. Is also possible. In each of the above embodiments, the catalyst 12 is disposed above the electric heater 13, but the configuration (arrangement) of the catalyst 12 and the electric heater 13 can be changed as appropriate. It is also possible to employ a configuration in which the electric heater 13 is disposed or a configuration in which the catalyst 12 and the electric heater 13 are disposed in multiple.
[0029]
In each of the above embodiments, the present invention has been implemented by using the casing 11 shown in FIG. 1 or FIG. 6, but it is also possible to implement by using the casing 11 shown in FIG. 9 or FIG. 10. is there. The casing 11 shown in FIG. 9 is provided with a suction port 11a for sucking air containing odor components on the lower right side, and a discharge port 11b for discharging air after deodorizing the odor components, on the lower left side. The interior is partitioned by a partition plate 17 into a first chamber R1 in which the suction port 11a communicates via the intake duct 11c and a second chamber R2 in which the discharge port 11b opens and communicates at the upper part of the first chamber R1. Yes. The intake duct 11c has an intermediate portion made of a heat-conducting material facing the first chamber R1, and this intermediate portion (a heat absorption fin extending outward or a heat dissipation fin extending inward may be provided). The air in the inside is heat exchanged with the air in the upper part of the first chamber R1. Therefore, the intake air is preheated and the exhaust gas is precooled, so that the thermal efficiency of the electric heater 13 can be increased, and the refrigeration apparatus (not shown) provided in the discharge port 11b (the refrigeration apparatus shown in FIG. 1 or FIG. 6). The energy saving effect of 50) can also be expected.
[0030]
On the other hand, the casing 11 shown in FIG. 10 has a suction port 11a for sucking air containing odor components on the lower left side and a discharge port 11b for discharging air after deodorizing the odor components at the bottom. The interior is partitioned by a partition plate 17 into a first chamber R1 communicating with the suction port 11a via the intake passage 11d and a second chamber R2 opening the discharge port 11b and communicating with the upper portion of the first chamber R1 at the top. ing. The intake passage 11d is provided so as to surround an inner wall (a wall forming the first chamber R1 and the second chamber R2) made of a thermally conductive material, and the air inside the first passage R1. And it is set as the structure heat-exchanged with the air in 2nd chamber R2. Therefore, the intake air is preheated and the exhaust gas is precooled, so that the thermal efficiency of the electric heater 13 can be increased, and the refrigeration apparatus (not shown) provided in the discharge port 11b (the refrigeration apparatus shown in FIG. 1 or FIG. 6). The energy saving effect of 50) can also be expected. Further, the outer temperature of the casing 11 can be lowered, and the heat insulating layer when the heat insulating material is provided around the casing 11 can be made thin.
[Brief description of the drawings]
1 is an overall configuration diagram schematically showing an embodiment of a deodorizing apparatus according to the invention of claim 1;
2 is an enlarged perspective view schematically showing the catalyst shown in FIG. 1. FIG.
3 is an enlarged plan view schematically showing the electric heater shown in FIG. 1. FIG.
4 is an electric circuit diagram showing a part of the electric control device shown in FIG. 1; FIG.
FIG. 5 is an operation explanatory diagram of the embodiment shown in FIGS.
6 is an overall configuration diagram schematically showing an embodiment of a deodorizing apparatus according to the invention of claim 2. FIG.
7 is an electric circuit diagram showing a part of the electric control device shown in FIG. 6. FIG.
8 is an operation explanatory diagram of the embodiment shown in FIGS. 6 and 7. FIG.
FIG. 9 is a cross-sectional view showing another embodiment of the casing.
FIG. 10 is a cross-sectional view showing another embodiment of the casing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Casing, 11a ... Inlet port, 11b ... Exhaust port, 12 ... Catalyst, 13 ... Electric heater (heating element), 14, 15, 19 ... Temperature sensing tube (temperature detection means), 16 ... Fan motor (blower means) , 30 ... Electric control device 31, 32, 33 ... Temperature controller, 34 ... Timer, 34a ... Timer contact, 35 ... Relay, 35a ... Relay contact, 50 ... Refrigerating device, 51 ... Cooler, A1, A2 ... Deodorization apparatus.

Claims (2)

A catalyst having a deodorizing function provided inside a casing disposed adjacent to a cooler that cools the inside of a refrigerator or the like during cooling operation of the refrigeration apparatus, a heating element that generates heat by energizing the catalyst, and heat In the deodorizing apparatus comprising a blowing means for circulating the internal air so that the air deodorized by heating the catalyst by sucking the internal air is blown toward the cooler,
Temperature detecting means for detecting the heating temperature of the catalyst;
Power supply control for controlling energization of the heating element so that the heating temperature of the catalyst is maintained in a predetermined temperature range defined by a predetermined upper limit set temperature and a lower limit set temperature in response to a detection signal of the temperature detection means Means,
The cooling operation of the refrigeration apparatus is stopped only when the catalyst is heated by energizing the heating element under the control of the power supply control device, and the heating temperature of the catalyst is maintained in the temperature range. An electrical control device for a deodorizing device attached to a cooler, characterized in that it comprises cooling operation control means for continuing the cooling operation of the refrigeration device. 2. The electrical control device according to claim 1, wherein the temperature of the air cooled by the cooler and circulated into the cabinet is detected, and the catalyst is controlled under the control of the power supply control unit. When the temperature of the air detected by the temperature sensing means rises to a predetermined temperature when heated by energizing the heating element, the energization to the heating element is disabled and the refrigeration apparatus is started to elapse a predetermined time. An electrical control device for a deodorizing device attached to a cooler, further comprising means for enabling energization of the heating element later.

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