JPH09101077A - Deodrizing device of refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a bad smell absorption function of a defrosting heater where a deodrizing coating is applied on the surface of a glass tube heater upon cooling interruption excepting the time for feeding cold air, and defrosting during cooling, without deteriorating cooling capability. SOLUTION: There are provided a refrigerating machine 9, a cold air stirring fan motor 10, and a defrosting heater 19 disposed below the condenser 9, and supplied with power during defrosting. A deodrizing coating is applied on the surface of the defrosting heater 19. In such a refrigerator 1, a deodrizing device thereof is adapted such that power is supplied intermittently to the defrosting heater 19 not only upon defrosting but also upon cooling interruption other than upon feeding cold air and upon defrosting during cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator deodorizing device for removing a malodorous component contained in the air in a refrigerator.

[0002]

2. Description of the Related Art Conventionally, as a deodorizing device for a cold air forced circulation type refrigerator in which air in a refrigerator is circulated, a defrosting heater in which a deodorizing paint is applied to the surface of a glass tube heater provided in the air circulation path. Is used. Then, during cold air circulation, the bad smell component of the cool air is adsorbed on the surface of the deodorant paint on the heater surface, and the defrosting heater is energized by energizing the defrosting heater for about 20 to 30 minutes once for about one to two days. The odor is thermally decomposed by raising the temperature to about 250 ° C or higher. Most commonly, when the freezer compartment thermistor detects that the temperature of the freezer compartment has risen above a specified temperature as shown in the timing chart of FIG.
N, and turns off when the temperature becomes lower than the specified temperature. Similarly, the cooling air stirring fan motor is also ON / OFF controlled.
The timer integrates the operating time of the compressor and periodically energizes the defrost heater at every certain cycle to defrost and finish the defrost with the defrosting detection bimetal thermostat or thermistor attached to the cooler. . For example, compressor ON time T1 + T
2 + T3 + ... Tn-1 + Tn = At the time of integration of 8 hours, the defrosting heater is energized to start defrosting. Next, a method is often adopted in which energization of the defrost heater is terminated when the defrosting termination detecting bimetal thermostat or thermistor attached to the cooler detects a defrosting termination temperature of about 10 ° C. This defrosting time depends on the adhered state of frost and its amount, but is completed in about 20 to 30 minutes.

[0003]

However, the deodorizing paint applied to the surface of the glass tube heater is saturated in adsorption about 1 hour after the start of absorbing a bad odor. On the other hand, in the conventional method, it takes about 1 to 2 days until the bad odor of cold air is adsorbed to the deodorant paint on the surface of the glass tube heater until it is thermally decomposed, so about 1 hour after the defrosting is started and the cooling is started. A bad odor is adsorbed by the deodorant paint on the surface of the glass tube heater, but after that, the adsorbing power is extremely reduced. In addition, there is a drawback in that the bad odor generated from the food stored in the refrigerator and the bad odor of the newly stored food cannot be absorbed after 1 hour from the start of cooling.

The present invention focuses on the above-mentioned drawbacks of the prior art, and an object thereof is to provide a refrigerator in which the malodor absorbing function of the defrosting heater is improved.

[0005]

In order to solve the above problems, a deodorizing device for a refrigerator according to the present invention is arranged under a cooler, a fan motor for cold air stirring, and a cooler, and is energized during defrosting. In a refrigerator equipped with a defrosting heater, and the surface of the defrosting heater is coated with deodorant paint, not only during defrosting, but also during cooling, during cooling air blowing, and during cooling stop other than during defrosting. In, the defrosting heater is intermittently energized.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 2, reference numeral 1 denotes a refrigerator, which is composed of a heat insulating box 2 having a front opening which constitutes the main body thereof, and doors 3 and 4 which close the opening of the box. The door 3 is a rotary door corresponding to a freezer compartment 5 described later, and the door 4 is a rotary door corresponding to a refrigerating compartment 6 described below. Reference numeral 7 denotes a horizontal partition wall that divides the inside of the heat-insulating box body 2 into upper and lower chambers. In this embodiment, the upper part of the partition wall 7 is a freezing chamber 5 below which the food is cooled to a freezing temperature (for example, around -20 ° C) Is a refrigerating chamber 6 that is cooled to a temperature at which food does not freeze (for example, about 3 ° C.).

Further, a partition plate 8 is arranged at the back of the freezer compartment 5,
Behind this partition plate 8 is formed a cooler chamber 11 in which a plate fin type cooler 9 as a cooler and a cool air stirring fan motor 10 are arranged. Reference numeral 8a is an outlet for blowing the cool air cooled by the cooler 9 into the freezing compartment 5, and 8b is an inlet for returning the cool air circulated in the freezing compartment 5 to the cooling compartment 11. Reference numeral 12 denotes a freezer compartment thermistor installed on the partition plate 8 at the back of the freezer compartment 5 for turning on / off the compressor 13 and keeping the temperature of the freezer compartment constant. Reference numeral 14 denotes a cold air duct to the refrigerating compartment 6, and distribution of the cool air to the refrigerating compartment 6 is controlled by opening / closing a baffle of a damper thermostat 15. A machine room 17 in which the compressor 13 and the evaporation tray 16 are arranged is formed in the lower part and the rear part of the heat insulating box 2. Reference numeral 18 denotes a dew tray arranged below the cooler 9, and 19 denotes a glass tube defrosting heater arranged between the dew tray 18 and the cooler 9.

The defrosting heater 19 will be described with reference to FIG. 3. A heater wire 20, a quartz glass tube 22 coated with a deodorizing paint 21 composed of a porous deodorizing catalyst layer, and both ends of the quartz glass tube 22 are shown. Silicon cap to cover 2
It consists of 3 and 3. This defrosting heater has a timer 24
The operating time of the compressor 13 is integrated by periodically energizing the defrosting heater 19 at regular intervals to perform defrosting, and the defrosting completion detection bimetal thermostat or thermistor (not shown) attached to the cooler 9 ) To finish defrosting. At the same time, the odorous components adsorbed on the deodorizing paint 21 are decomposed and the moisture is dried. 25 is the dew tray 18 to the evaporation tray 16
It is a drain pipe that guides defrosting water up to.

The ON / OFF operation of the defrosting heater in which the deodorizing paint is applied to the surface of the glass tube heater of the present invention will be described with reference to the timing chart of FIG. Cooling compressor 13
Is turned on when the freezer compartment thermistor detects that the temperature of the freezer compartment is higher than the specified temperature, and is turned off when it is lower than the specified temperature. Similarly, a fan motor for cold air stirring 1
0 is also ON / OFF controlled. The timer 24 is the compressor 1
The operating time of 3 is integrated, and the defrosting heater 19 is periodically energized to defrost, and a defrosting completion detection bimetal thermostat or thermistor (not shown) attached to the cooler 9 defrosts. Defrosting is terminated when the removal end temperature is detected.

Further, the defrosting heater 19 is in a cooling operation other than defrosting, that is, when the compressor is operating (ON), when the cool air agitating fan motor 10 is blown with cold air (ON), and when cooling is not performed during defrosting. Heater 1 for defrosting once per hour
9 is energized for about 2 minutes, and then the energization is stopped. One hour until this energization is the time when the deodorizing paint 21 applied to the surface of the defrosting heater 19 reaches the malodor adsorption saturation level. At the same time that the defrosting heater 19 starts to be energized, the cold air stirring fan motor 10 is stopped. The reason for stopping is to prevent the amount of heat generated by the energization of the defrosting heater 19 for 2 minutes from leaking heat into the refrigerator and the freezer. The energizing time of 2 minutes is for the deodorizing paint 21 to have a temperature of 250 ° C. or higher, which is the temperature at which the odorous components start to be oxidized and decomposed.
This is because there is no influence such as an increase in the air temperature in the freezer compartment, and the amount of power consumed by energizing the defrosting heater 19 is suppressed to a minimum. Then, after the completion of energization for 2 minutes, it is possible to newly start absorbing the malodor.

[0012]

As described above, according to the present invention, the defrosting heater is applied with deodorant paint on the surface not only during defrosting but also during cooling, cooling air blowing, and cooling stop other than defrosting. Energize the defrosting heater in a short cycle of 1 hour to several hours. The surface temperature of the heater is the temperature at which the deodorizing paint can be decomposed into the bad odor in about 2 to 3 minutes after the start of energization.
C. or more is sufficiently reached to decompose the malodor (however, the cooling air stirring fan motor 10 is not energized for 2 to 3 minutes).
The energization of the defrosting heater for 2 to 3 minutes does not affect the air temperature in the refrigerator or the food temperature in the refrigerator, and the amount of power consumed by the energization is small. Further, since the bad smell can be newly started to be adsorbed after the energization is completed, the bad smell adsorbing function of the defrosting heater can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a refrigerator.

FIG. 2 is an enlarged sectional view of a main part of a defrosting heater.

FIG. 3 is a front view of a defrosting heater.

FIG. 4 is an ON / OFF time chart of the defrosting heater, compressor, and cool air agitating fan motor of the present invention.

FIG. 5 is an ON / OFF time chart of a conventional defrosting heater, compressor, and cool air stirring fan motor.

[Explanation of symbols]

 1 Refrigerator 9 Cooler 10 Fan motor for cold air agitation 19 Heater for defrost 21 Deodorant paint

Claims (1)

[Claims] 1. A cooler, a fan motor for cold air agitation,
In a refrigerator provided with a defrosting heater which is arranged below the cooler and energized during defrosting, and the surface of the defrosting heater is coated with deodorant paint, not only during defrosting but also during cooling. A deodorizing device for a refrigerator, wherein the defrosting heater is intermittently energized when cold air is blown and cooling is stopped except during defrosting.