JPH0340356Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to an air conditioner equipped with an electrostatic air purifier.

<Prior Art> As a conventional example of this type of air conditioner, the one shown in FIGS. 6', a heat exchanger 7', and an air outlet 15' form a ventilation path 17', and the air conditioner is provided with a blower fan 16' in the ventilation path 17', and the prefilter 6' and the heat exchanger An electrostatic dust collection unit 12' is provided between the parts 7' and 7'.
Micro switch 3 that turns on by installing 2'
0' to prevent the air purifier from operating if the electrostatic dust collecting unit 12' comes off or is forgotten to be attached after cleaning.

<Problems to be Solved by the Invention> In this conventional example, the installation of the microswitch 30' to prevent danger and the routing of this wiring are troublesome, resulting in poor workability and increased costs.

Also, when the amount of dirt and dust attached to the electrostatic dust collection unit 12' increases, discharge begins to occur between the electrodes, and at this time, if wiring runs near the electrostatic dust collection unit 12', noise is generated from the wiring. may enter the air conditioner and cause the air conditioner to malfunction.

<Means for solving the problem> Fluctuation current corresponding to the current value of the high voltage current flowing through the electrode circuit is detected by a detection means of a detection circuit provided on the primary side, and the current value detected by the detection means is set. The present invention relates to an air conditioner characterized in that it is provided with a means for stopping the energization of the electrostatic precipitator unit and indicating an abnormality when the value is lower than or higher than a reference value.

<Operation> When the operation switch 20 of the air conditioner is turned on, normal heating and cooling operation starts. Next, turn on the cleaner switch 22 to operate the air purifier. At this time, if the dust collection unit 12 is forgotten to be attached or removed, no current will flow through the dust collection unit 12, so the cleaner operation lamp 23 will continue to blink and the air purifier will not operate.

Also, during normal operation, if there is a lot of dirt, dust, etc. attached to the dust collection unit 12 and the current value flowing through the dust collection unit 12 becomes 200μA or more, the dust collection unit 12
The normal operation is stopped and the cleaner operation lamp 23 continues to blink.

Of course, if there is no abnormality in the dust collection unit 12, the air purifier will operate normally.

〈Example〉 To explain an example shown in Fig. 6 from Fig. 1, 1
1 is a front panel that covers the front surface of the indoor unit of the air conditioner, and has a front door 3 in which a suction port 2 is opened in the form of a slit in most of the front panel except for a part on the right side of the front surface.

An opening/closing fitting 4 is attached to the back surface of the upper part of the front door 3 so that the door 3 can be opened and closed.

5 is a casing that covers the back side while maintaining space with the front panel 1, and 6 is a pre-filter for removing relatively large dust, which is detachably attached to the back side of the suction port 2. Reference numeral 7 designates a horizontally long flat heat exchanger located behind the pre-filter 6, with a heat exchanger located above or below the side facing the pre-filter 6, preferably in a part of the upper part in the vertical and width directions in order to prevent condensation water and the air volume. about 1/
A fin 9 other than the thin width portion 8 is provided with a meandering heat exchange tube 10.

A dust collection unit 12 is attached to the thin width part 8 via a frame-shaped insulating member 11 so as not to protrude. The dust collection unit 12 has two on the left and right, and has a plate shape and has a discharge counter electrode 12a connected to a positive power source, with several square holes 12b each having a side of about 15 mm regularly opened and one side bent toward the downstream side. A combination of unit plates 12d, 12d, 12d is provided, in which a dust collecting pole piece 12e is provided, and a needle-shaped discharge electrode 12c connected to a negative power source is positioned from the back side toward the center of each rectangular hole 12b. (see figures a, b, c),
A handle 13 for use in removing the dust collecting unit 12 is provided at the lower front surface, and the dust collecting unit 12 is fixed to end plates 14 at both ends of the heat exchanger 7 via insulating members 11.

In addition, when the dust collection unit 12 is energized, a voltage of about DC7Kv boosted by the transformer 27 is loaded (negative discharge) between the discharge counter electrode 12a and the discharge electrode 12c, and the dust collection unit 12 collects fine dust, smoke, bad odor, dust mites, etc. in the air. Floating objects are charged and attracted to each dust collection pole piece 12e.

15 is an air outlet, 16 is a fan provided in the ventilation path 17, 18 is a wind direction plate provided in the air outlet 15,
19 is a dew saucer.

Also, when the front door 3 is opened, the dust collection unit 12
A safety measure (not shown) is provided to automatically stop energization.

Reference numeral 20 denotes an operation switch for the air conditioner, and when it is turned on, an operation lamp 21 lights up and normal heating and cooling operation begins.

22 is a cleaner switch, and when this is turned on, the cleaner relay 29 is turned on, the cleaner lamp 23 is lit, and the air purifier starts operating.

Reference numeral 23 denotes a cleaner lamp, which is lit during normal operation of the air purifying device and starts blinking when the dust collection unit 12 is removed or an electric discharge occurs due to dust adhesion.

24 is a rectifier circuit that converts commercial power into direct current using a diode D1 and an electrolytic capacitor C1.

Reference numeral 25 denotes a detection circuit, which also serves as detection means for transmitting changes in the current flowing through the resistor R8 to the control circuit by the photocoupler 30.

26 is an oscillation circuit that oscillates the DC from the rectifier circuit 24 at high frequency, generates a high voltage in the electrode circuit 28 by boosting the voltage in the transformer 27, and collects the DC high voltage rectified in the electrode circuit 28. This is in addition to unit 12.

29 is a cleaner relay that turns on and off the operating power of the air purifier.

30 is a photocoupler within the detection circuit 25, which transmits a signal using light.

To explain the detection method, under normal operating conditions, a constant minute current flows through the dust collection unit 12 and the electrode circuit 28, a stable current also flows through the primary side detection circuit 25, and the photocoupler 30 lights up.

As shown in Figure 6, if you remove the dust collection unit 12 for cleaning and forget to put it back on, or if you do not fit it in properly when installing it, when the current stops flowing through the dust collection unit 12, the secondary coil L3
Since only a smaller current flows than in the normal operating state, the current in the primary coils L1 and L2 decreases, and the current value in the resistor R8 also decreases, causing the photocoupler 3
Since 0 does not light up, the detection circuit 25 transmits a signal to the control circuit when the current value is low, and the cleaner relay 29 is activated.
Turn it off to stop the power supply and make the cleaner lamp 23 blink.

Alternatively, if dust adheres to the dust collection unit 12 and the current value exceeds 200 μA, sparks will fly between the electrodes and discharge will occur. Then, an overcurrent will momentarily flow in the secondary coil L3, and as a result, the primary coil L1,
Since an overcurrent also flows through L2, the oscillation cycle is disrupted, causing the oscillation to momentarily stop, the current in the resistor R8 decreases, and the photocoupler 30 flashes, and the detection circuit 25 detects this by increasing the current value. and transmits the signal to the control circuit, and the cleaner relay 29
It is turned off to stop power supply to the dust collection unit 12, and the cleaner lamp 23 changes to blinking.

<Effects of the invention> According to this invention, the variable current corresponding to the current value of the high current flowing through the electrode circuit is detected by the detection means of the detection circuit provided on the primary side, and the current value detected by the detection means is set. Since it is equipped with a means to stop energizing the electrostatic precipitator unit and indicate an abnormality when the value is lower or higher than the standard value, there is no need to install a micro switch, which eliminates troublesome work such as wiring. This makes it unnecessary, improving work efficiency, reducing costs, and allowing for a compact design.

Of course, even if there is no micro switch, the detection circuit will stop the operation even at a low current value, so if the electrostatic dust collection unit is forgotten or installed incorrectly, it will be notified and it will be convenient to take immediate action.

The detection circuit also stops the current even when the current is high, thereby preventing spark discharge from the electrostatic dust collection unit and noise from entering the air conditioner itself.

[Brief explanation of the drawing]

Figure 1 is a sectional view of one embodiment of this invention, Figure 2 is a detailed view of the main parts, Figure 3 is an exploded explanatory view of the electrostatic dust collection unit, and Figures 4 and 5 are circuit diagrams. , FIG. 6 is an explanatory diagram of a photocoupler, FIG. 7 is a sectional view of a conventional example, and FIG. 8 is a circuit diagram thereof. 12... Electrostatic dust collection unit, 24... Rectifier circuit, 25... Detection circuit, 26... Oscillation circuit, 27
...transformer, 28...electrode circuit.

Claims (1)

[Scope of utility model registration request] The air conditioner is equipped with an electrostatic dust collection unit 12 in the air conditioner main body, a transformer 27 for applying voltage to the electrostatic dust collection unit 12, and an electrode circuit 28 on the secondary side of the transformer 27. In the
A variable current corresponding to the current value of the high voltage current flowing through the electrode circuit 28 is detected by the detection means of the detection circuit 25 provided on the primary side, and the current value detected by the detection means is lower or higher than a set reference value. An air conditioner characterized in that it is provided with a means for indicating that the electrostatic dust collecting unit 12 is turned off at certain times and that an abnormality is detected.