JPH0320582A - Refrigerator with deodorizing device - Google Patents

Abstract

PURPOSE:To prevent deodorizing capability from being lowered and ozone from being excessively increased by changing the supply of high voltage applied to ozone generation means in response to the frequency of an AC power supply. CONSTITUTION:When a refrigerator is on an operation state, an H level is outputted from a port P3 of a microcomputer 26 to open and close a lead switch 24, whereby with an AC power supply being 50Hz a waveform exhibited by a pattern 1 is inputted into a P1 port of the microcomputer 26 and with the AC power supply being 60Hz a waveform exhibited by a pattern 2 is inputted into the same. A power supply frequency comparison program 26a decided said frequency and outputs the pattern 1 or the pattern 2 to a port P2. Hereby, a transistor 28 is made conductive to permit a current to flow through a coil 23a of a relay 23 and hence a switch 23b to be closed. Thus, a current flows instantaneously through a primary coil 15a of a high voltage transformer 15 to produce pulsed high voltage across opposite ends of a secondary coil 15b. The high voltage is applied to ozone producing means 17 to produce ozone. Thereupon, if a relationship between a 50Hz H level period T1 and a 60Hz H level period T2 is assumed to be 60:50, production of ozone from the ozone producing means 17 is made constant and deodorizing capability is also made constant.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a refrigerator equipped with a deodorizing device that has ozone generating means for generating ozone for removing malodorous components in the refrigerator.

[Prior art] As a conventional refrigerator with a deodorizing device of this kind, for example,
1-104182. Figure 7 is shown in this publication, and in the figure (1) is the AC
A main switch whose one terminal is connected to one end of the AC power supply that is the commercial power source of IOOV, (2) is a thermostat whose one end is connected to the other terminal of this main switch,
(3) is a refrigerator compressor connected between the other end of this thermostat and the AC power source, and (4) is an evaporator (not shown) whose one end is connected to the other end of the main switch (1). 11i for blowing cold air from ) into the refrigerator.
1i1J blower, (5) is an interior light connected to the other end of the main switch (1), and a door switch that is switched according to the opening and closing of the door of the refrigerator compartment, which is connected to the other end of the blower (4). the first switching contact (6a), and the above-mentioned Kounai light (5).
) a second switching contact (6b) connected to the other end of the AC power supply, a fixed contact (6c) connected to the other end of the AC power supply, and a second switching contact (6C) connected to the second switching contact (6C) and the second switching contact (6C) connected to the other end of the Contact (6a
) (6b) and a switching contact piece (6d) for switching and connecting. (7) is the main switch (1) above.
) is an electronic control circuit connected between the other end of the AC power source and the other end of the AC power supply, which controls the defrosting fan motor (not shown) and the rapid cooling relay (not shown). When open, that is, when the switching contact (6d) switches from the first switching contact (6a) to the second switching contact (6b), the built-in timer is reset;
6d) from the second switching contact (6a) to the first switching contact (
6b), a built-in timer starts accumulating time and generates an output when a predetermined period of time has elapsed. (8) is a timer switch whose one end is connected to the first switching contact (6a), and which is connected to the electronic control circuit (7).
The opening/closing is controlled by the output of the door, is opened by opening the door, and is closed after a predetermined period of time has elapsed after the opening of the door. (9) is an outlet connected between the other end of the main switch (1) and the timer switch (8), and (10) is a plug connected to this outlet, with first and second connections. It has commas (10a) <10b). (
11) is the first connection point (10a) of this plug
(12) is a piezoelectric fan connected between the other end of this fuse and the second connection point (iob) of the above-mentioned plug 00);
3) is a first resistor whose one end is connected to the other end of the fuse (11), (I4) is a first capacitor whose one electrode is connected to the other end of this resistor, and (15) is 1 A high voltage transformer in which one end of the secondary coil (15a) is connected to the other end of the first capacitor (14), (16) connects the other end of the primary coil (15a) of this high voltage transformer with the plug ( The first diode (l7) is connected between the second connection point (10b) of 10), and the ozone generator (l7) is connected between both ends of the secondary coil (15b) of the high voltage transformer (l5). This is a method that generates ozone to deodorize the inside of the refrigerator. (18) is a thyristor connected between the other end of the first resistor (l3) and the anode of the twenty-first diode (16), and (19) is an anti-parallel connection between the anode and cathode of this thyristor. The second diode (20) connected to the thyristor (l
8) is a second capacitor connected between the gate and cathode of the thyristor (18), and (21) is a second resistor connected between the gate and cathode of the thyristor (18). (22) is the gate of the thyristor (l8) and the plug (10)
This is the third resistor connected between the second connection point (10b) and the second connection point (10b).

Next, the operation of the refrigerator with a deodorizing device configured as described above will be explained. First, during normal refrigeration cycle operation, the compressor (3) is controlled by the thermostat (
2) ON. The inside of the refrigerator is maintained at a predetermined temperature by repeating operation and stopping due to the OFF operation.

On the other hand, since the switching contact (6d) of the door switch (6) is connected to the first switching contact (6a) and the timer switch (8) is closed, the AC power supply is turned on to the deodorizing device (A ), and the deodorizing device (A) is in operation.

That is, while the piezoelectric fan (l2) is being operated, the first resistor (13), the first capacitor (14), and the high voltage transformer (15) are ) and the primary coil (15a) of
The lth capacitor (14) is charged by the current bus of the diode (l6). During the next half cycle, the second capacitor (20) begins to be charged via the third resistor (22), and when this charging voltage reaches the switching voltage of the thyristor (18), the thyristor (18) becomes conductive; The charging voltage of the t-th capacitor (l9) charged in the previous half cycle is discharged through the thyristor (l8), and current momentarily flows through the primary coil (15a) of the high-voltage transformer (l5). A pulse-like high voltage is generated between both ends of the secondary coil (15b).This high voltage is applied to the ozone generating means (17), and the ozone generating means (17) generates ozone.This ozone Eliminate some bad odors in the refrigerator.

After that, when the door is opened and the switching contact (6d) of the door switch (6) is switched from the first switching contact (6a) to the second switching contact (6b), the timer of the electronic control circuit (7) is activated. is reset, and the electronic control circuit (7) opens the timer switch (8). As a result, the deodorizing device (A)
The power will be cut off. After that, the door is closed and the switching contact (6d) of the door switch (6) becomes the second switching contact (6b).
When the switch is switched to the first switching contact (6a), the timer of the electronic control circuit (7) starts accumulating time, and when a predetermined period of time has elapsed, the timer switch (8) is closed. the result,
The deodorizing device (2) is energized again from the AC power source, and the interior of the refrigerator is deodorized in the same manner as described above.

[Problems to be Solved by the Invention] However, in the refrigerator with a deodorizing device configured in this way, the deodorizing device (A) is energized by the AC power source, which is a commercial power source, while the door is closed. Moreover, since the amount of ozone generated by the ozone generating means (17) of the odor emitting device 1f (A) in a predetermined time varies depending on the frequency of the AC power source5, for example, the ozone generating means (17) of the odor emitting device 1f (A) may be changed in accordance with the frequency of the 50 Hz commercial power source. 17) If the amount of ozone generated in a predetermined time is controlled, when used with a 60Hz commercial power supply, the amount of ozone generated in a predetermined time will be excessive, and conversely,
If the amount of ozone generated by the ozone generating means (I7) in a predetermined time is controlled according to the commercial power supply of 50Hz, the amount of ozone generated in the predetermined time will be too small when used with a commercial power supply of 50Hz, and the deodorizer There was a problem in that the deodorizing ability of ffiffi (A) was reduced.

This invention was made in view of the above points,
The object of this invention is to obtain a refrigerator with a deodorizing device that can generate a constant amount of ozone even if the frequency of the AC power supply for supplying voltage to the deodorizing device changes, and whose deodorizing ability is not affected by changes in frequency. be.

[Means for Solving the Problems] The refrigerator with a deodorizing device according to the present invention has a deodorizing device that includes a high voltage generating means that generates a high voltage in response to voltage from an AC power supply, and a high voltage generating means of the high voltage generating means. ozone generating means that receives voltage and generates ozone for deodorizing the interior of the refrigerator; frequency detecting means that detects the frequency of the AC power source and outputs an output according to the frequency; and the AC power source and high voltage generating means. and control means for receiving the output of the frequency detection means and controlling the state of energization from the AC power source to the high voltage generation means in accordance with the output. be. [Function] In the present invention, the control means that receives the output of the frequency detection means controls the energization state from the AC power supply to the high voltage generation means, and changes the energization state of the high voltage applied to the ozone generation means from the AC power source to the high voltage generation means. It changes according to the frequency of the power supply, so that the amount of ozone generated in a given period of time remains constant regardless of changes in the frequency of the AC power supply.

[Embodiment] An embodiment of the present invention will be described below based on FIG. The switch (23b) has one end connected to the other end of the AC power supply and the other end connected to the plug (9). (24) is a frequency detection means that detects the frequency of the AC power source and outputs an output according to the frequency. In this embodiment, the amount of cold air circulation is controlled by opening and closing the air passage to the storage room (not shown). This motor damper also serves as a motor damper for adjustment, and this motor damper has a motor part, a reed switch, a baffle, and a gear part.As shown in Figure 2, when the baffle is open, the reed switch is turned on and closed. It turns OFF when the main switch (1) is connected to one end of the motor section (24a) and the 5
- The power terminal is connected to one end of the reed switch (24.b) and the other end is grounded via a resistor (25). (26) is a microcomputer having a timer (26a) and a power supply frequency comparison program (26b) shown in FIG. 3, and a reed switch (24b) constituting the detection means (24).
A port P4 is connected to the other end via a resistor (27) and receives a signal according to the frequency of the AC power supply, and this port P4
A boat P that calculates the signal received in step 1 using a program (35) and outputs a pattern signal according to the frequency of the AC power supply.
(28) is connected between the other end of the coil (23a) of the first relay (23) and the ground. connected, and the base is connected to port P1 through the resistor (29).
a first transistor (30) connected to the first transistor;
A first flywheel diode (31) is connected in parallel to the coil (23a) of the relay (23), a second flywheel diode (31) has its emitter grounded and its base connected to port P3 via a resistor (32). transistor, (33)
is a coil (33a) connected between the collector of this second transistor (31) and the 5■ power supply terminal, and a second relay whose opening and closing are controlled by this coil (33a).
A switch (33b) is connected between the other end of the AC power source and the other end of the motor section (24a). (34
) is a second flywheel diode connected in parallel to the coil (33a) of this second relay. In addition, the resistance of the first step (13). First capacitor (14)
．． High voltage transformer (l5), first diode (16),
Thyristor (18), second diode (19), second
capacitor (20), second and third resistors (21)
(22) constitutes a high voltage generating means that generates a high voltage by receiving voltage from an AC power supply, and the first relay (
23) Microcomputer (26>, first transistor (ZS), resistor (29), and first flywheel diode (30), connected between the AC power source and the high voltage generation means, and connected to the motor damper. The control means receives the output of the detection means (24), which is constructed by the AC power source, and controls the state of energization from the AC power supply to the high voltage generation means in accordance with the output.

Next, the operation of the refrigerator with a deodorizing device configured as described above will be explained. First, when performing normal refrigeration cycle operation, the compressor (3)
is the thermostat (2) ON. The refrigerator compartment is kept at a predetermined temperature by repeating operation and stopping due to the OFF operation.

On the other hand, when the main switch (1) of the refrigerator is turned on and the refrigerator is in operation, the microcomputer (2)
An H level output is output from port P of 6), the second transistor (3l) becomes conductive, current flows through the coil (33a) of the second relay (33), and the switch (33b) ) is closed.

As a result, current flows through the motor section (24a) of the detection means (24), and the reed switch (24) opens and closes according to the opening and closing state of the baffle as shown in FIG. H level (
5■ potential) and L level (ground potential) are input. When the commercial power supply serving as an AC power source is 50 circles, the P1 boat of the microcomputer (26) has the waveform shown in Figure 4(a), and when it is at 60 circles, the microcomputer (26) has a waveform shown in Figure 4(a).
The waveform shown in Fig. 4(b) will be input to the P4 port of 6). P4 of microcomputer (26)
When the waveform shown in FIG. 4(a) or (b) is input to the port, the power supply frequency comparison program (26a) of the microcomputer (26) first detects the AC power supply in step 1 according to the prochart shown in FIG. Determine the frequency of . This determination is based on the boat P of the microcomputer (26).
The time THi is at the H level is compared with the arithmetic average of the time T I (50) of the H level when it is 50 cells and the time T H (50) of the H level when it is 60 cells, and the time T
If it is determined that Hi is larger than the arithmetic mean, pattern 1 shown in FIG. Output to P2. The first transistor (
28) is the port P of this microcomputer (26)
It is controlled by pattern 1 or 2 appearing in 3. In other words, the period T1 or T2 in which pattern 1 or 2 is at H level
, the first transistor (28) is turned on and the first transistor (28) is turned on.
A current flows through the coil (23a) of the relay (23) to close the switch (23b). the result,
AC power is applied to the high voltage generating means of the deodorizing device. Then, the piezoelectric fan (12) is driven, and the first resistor (13) and the lth capacitor (14) are turned on during the positive half cycle of the sinusoidal voltage from the AC power source.
), the first capacitor (l4) is charged by the current bus of the primary coil (15a) of the high voltage transformer (15) and the first diode (l6). During the next half cycle, the second capacitor (20) begins to be charged via the third resistor (22), and when this charging voltage reaches the switching voltage of the thyristor (18), the thyristor (l8) becomes conductive; The first capacitor (1
The charging voltage of 9) is discharged through the thyristor (18), and current momentarily flows through the primary coil (15a) of the high voltage transformer (15), creating a pulse between both ends of the secondary coil (15b). A high voltage is generated. This high voltage is applied to the ozone generating means (17), and the ozone generating means (17) generates ozone. This ozone removes some of the bad odor in the refrigerator compartment. The period for generating ozone in means (17) is the H level period T1 shown in FIG. 5(a) when the frequency is 50 Hz, and the H level period T2 shown in FIG. 5(b) when the frequency is 60 Hz. The frequency of the AC power supply applied to the high voltage generating means and the ozone generating means (17
) and the amount of ozone generated per unit time is as shown in Figure 6, and the relationship is almost proportional in the vicinity of 50 to 60 rods. In other words, the amount of generation per unit time when 50 cells are As. and the amount generated per unit time at 60 m A6. , the relationship is 50:60. Therefore, the relationship between the H level period T shown in FIG. 5(a) at the time of 50 and the H level period T2 shown in FIG. 5(b) when the time is 60 is 60:50. , Regardless of changes in the frequency of the AC power supply, ozone generation means (
17) The amount of ozone generated per predetermined time is constant, and the deodorizing ability is also constant. In the above embodiment, a motor damper is also used as the detection means (24), but it is not limited to this. For example, the output of a Hall element for detecting the rotation speed of a compressor or a fan motor for cold air circulation It is also possible to use Further, in the above embodiment, the energization state of the high voltage generating means is controlled only by the first relay (23), but as explained in the above conventional example, when the door is open/closed, the energization state is controlled by the first relay (23). A timer switch (8) may be connected in series with the switch (23b) of the first relay (23) to prevent this.

[Effects of the Invention] As described above, the present invention provides a deodorizing device that includes a high voltage generating means that receives voltage from an AC power source and generates a high voltage, and a storage unit that receives the high voltage of the high voltage generating means. an ozone generating means for generating ozone for deodorizing the interior; a frequency detecting means for detecting the frequency of the AC power source and outputting an output according to the frequency; and a connection between the AC power source and the high voltage generating means. and control means for receiving the output of the frequency detecting means and controlling the state of energization from the AC power source to the high voltage generating means in accordance with the output, and receiving the output of the frequency detecting means. Since the control means controls the energization state from the AC power supply to the high voltage generation means and changes the energization state of the high voltage applied to the ozone generation means according to the frequency of the AC power supply, the ozone generation means The amount of ozone generated during a given period of time remains constant regardless of changes in the frequency of the AC power source, and has the effect that there is no excessive amount of ozone or a decrease in deodorizing ability due to changes in the frequency of the AC power source.

[Brief explanation of drawings]

Fig. 1 is a main part electric circuit diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the baffle of the motor damper constituting the frequency detection means (24) and the reed switch, and Fig. 3 is a diagram showing the relationship between the microcomputer (26) is a flowchart for determining the operation pattern of the power supply frequency comparison program (26b), FIG. 4 is a waveform diagram of the signal input to port P1 of the microcomputer (26), and FIG. A waveform diagram of the signal output from port P2, Figure 6 is a diagram showing the relationship between the frequency of the AC power supply and the amount of ozone generated by the ozone generating means, and Figure 7 is an electrical circuit diagram of the main parts of a conventional refrigerator with a deodorizing device. It is. In the figure, (l5) is a high voltage transformer constituting high voltage generation means, (17) is ozone generation means, (23) (2
6) is a first relay and a microcomputer constituting a control means, and -(24) is a frequency detection means. Note that the same symbols in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] In a refrigerator equipped with a deodorizing device for deodorizing the interior of the refrigerator, the deodorizing device includes a high voltage generating means that generates a high voltage in response to voltage from an AC power supply, and a high voltage generating means that generates a high voltage by receiving voltage from an AC power source. ozone generating means that receives high voltage and generates ozone for deodorizing the inside of the refrigerator; frequency detecting means that detects the frequency of the AC power source and outputs an output according to the frequency; and the AC power source and the high voltage generator. and a control means connected between the high voltage generating means and receiving the output of the frequency detecting means and controlling the state of energization from the AC power source to the high voltage generating means in accordance with the output. A refrigerator with a deodorizing device featuring