JPH05187689A - Monitor of humidifier for air conditioner - Google Patents

Abstract

PURPOSE:To prevent waste of a large quantity of water by sensing upper and lower limits of water surface in a feedwater tank, and monitoring durations thereof. CONSTITUTION:If continuous ON of a long time occurs due to a malfunction of a water circuit, when the duration of a high water level signal exceeds a predetermained high water surface level limiting time, a high water surface level timer 37 outputs a high water level malfunction signal. If a long duration occurs, when the duration of a low water level signal exceeds a predetermined low water surface level limiting time, a low water surface level timer 38 outputs a low water surface level malfunction signal. Accordingly, all malfunctions of the circuit in which a variation in the water level of a feed water tank abnormally occurs. When the high or low water level malfunction signal is input, it is combined to output a malfunction signal, and a malfunction signal of a designated signal format of a continuous contact signal or an intermittent contact signal is output. Thus, waster of a large quantity of water due to a malfunction of a humidifier or leakage of a piping route can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidifier installed in a direct expansion type or central type air conditioner,
The present invention relates to a monitoring device for detecting water supply or drainage abnormality.

[0002]

2. Description of the Related Art A conventional device of this type will be described with reference to FIGS. First, the basic configuration of the air conditioner indoor unit incorporating the natural evaporation type humidifier will be described with reference to FIG. 4. Inside the air passage 2 constituted by the air conditioner exterior drain pan 1 and the like, the room air is blown from the suction port. When it is sucked by 3 and heated by the use side heat exchanger 4 and passes through the natural evaporative humidifier 5, the water inside the natural evaporative humidifier 5 is humidified and evaporated, and the water is sucked into the room again from the suction port. It is configured to be released.

Reference numeral 6 denotes a water supply tank in which water flowing from a water supply pipe 7 is stored in the water supply tank 6 through a water supply solenoid valve 8 and a tank water supply pipe 9. Reference numeral 10 denotes a partition plate provided inside the water supply tank 6, and the partition plate upper part is configured to be lower than the side wall height of the water supply tank 6, and when the liquid level becomes higher than the partition plate upper part, from the overflow pipe 11, It is discharged through a drain pipe provided at the lowest part of the air conditioner exterior drain pan 1.
Reference numeral 12 is a humidifier water supply pipe for supplying water to the natural evaporation type humidifier 5. A water supply float switch 13 controls ON / OFF of the water supply solenoid valve 8 by detecting the liquid level inside the water supply tank 6. (For example, when the liquid level drops, it turns on, and when the liquid level rises, it turns off.)

Next, the operation of the above configuration will be described with reference to FIG. A float switch 13 for water supply, a heating / humidification permission contact (thermo ON) 14, a solenoid valve 8 for water supply, and an air conditioner operation signal contact 15 are connected in series between both ends of the commercial power source, and the heating / humidification permission contact is further provided. (Thermo O
N) 14 and a solenoid valve 8 for water supply, both ends of which are connected in parallel with a timer 16, a timer delay a contact 17 of the timer 16 and a humidification abnormality output relay 18 are connected in series.

Reference numeral 19 denotes a humidification abnormality output relay a contact of the humidification abnormality output relay 18. In the above-mentioned configuration circuit, normally, each contact is closed by the permission of the air conditioner operation signal contact 15 and the heating / humidification permission contact (thermo ON) 14 to detect the liquid level in the water supply tank 6 of the water supply float switch 13. The solenoid valve 8 for water supply is turned on / off depending on the up / down direction. In this case, although it depends on the size of the humidification capacity of the natural evaporation type humidifier 5, the water supply float switch 13 is set to perform a differential operation in about 5 minutes, and is configured not to be continuously turned on for a long time. Has been done.

Therefore, when a continuous ON operation occurs for a long time due to an abnormality in the water circuit, the timer 16 is set up (for example, 30 minutes), so that the timer 16
The timer delay a contact 17 is turned on to operate the humidification abnormality output relay 18, and the humidification abnormality output relay a contact 19 obtains an abnormality signal.

[0007]

In the above-mentioned conventional humidifier monitoring device for an air conditioner, when the water circuit is abnormal and continuous ON occurs for a long time, the abnormal signal is output as described above. However, there is a problem that it is impossible to detect all the abnormal states of the water circuit that appear in the abnormal water level fluctuation of the water supply tank, because the abnormal state that the OFF state occurs for a long time cannot be detected.

Further, as in the conventional monitoring device, in the structure in which the abnormal signal of the water circuit is taken out from the humidifying abnormal output relay a contact, the abnormal signal in the form of intermittent contact signal required in recent intelligent buildings is taken out directly. I couldn't do that. Therefore, there has been a problem in that at the construction site, it is necessary to arrange circuit parts and modify cost for modifying the control panel so that abnormal signals can be obtained in the form of contact signals.

The present invention has been made to solve the above problems, and detects when the liquid level in the water supply tank is maintained at the upper limit and when the liquid level is maintained at the lower limit. It is an object of the present invention to provide a monitoring device capable of detecting all abnormal states of a water circuit that appear in abnormal water level fluctuations and switching and designating the abnormal signal form to a desired signal form.

[0010]

In a humidifier monitoring device for an air conditioner according to the present invention, a humidifier for an air conditioner that performs a humidifying operation by a humidifying operation signal and a water tank for supplying water to the humidifier. And outputs a high water level signal that continues until the water level of the water supply tank reaches a predetermined high water level until it reaches a predetermined low water level, and continues until it reaches a predetermined high water level after reaching the predetermined low water level. In a monitoring device of an air conditioner humidifier equipped with a water level signal output means for outputting a low water level signal, a high water level abnormality signal is output when the duration of the high water level signal exceeds a predetermined high water level limit time. A high water level timer, a low water level timer that outputs a low water level abnormal signal when the duration of the low water level signal exceeds a predetermined low water level limit time, and at least the high water level abnormal signal or the low water level abnormal signal. A signal synthesizing circuit that outputs an abnormal signal when one of them is input, an abnormal signal output circuit that outputs a contact signal that continues or an intermittent contact signal when the abnormal signal is input, and an output from the abnormal signal output circuit. Means for designating either the continuous contact signal or the intermittent contact signal as the signal to be applied.

[0011]

According to the present invention, when a continuous ON for a long time occurs due to an abnormality in the water circuit, if the duration of the high water level signal exceeds a predetermined high water level limit time, a high water level abnormal signal is output from the high water level timer. If a low water level signal is output for a long time and the duration of the low water level signal exceeds a predetermined low water level limit time, a low water level abnormal signal is output from the low water level timer. All abnormal states of the water circuit that appear abnormally are detected.

When at least one of the high water level abnormal signal and the low water level abnormal signal is input, they are combined to output an abnormal signal, and either a continuous contact signal or an intermittent contact signal is designated. An abnormal signal in the form of a signal is output.

[0013]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a control circuit diagram of a monitoring device for a humidifier for an air conditioner according to this embodiment. In FIG. 1, it comprises a power supply circuit including a transformer 20, a rectifier 21, and a smoothing capacitor 22, and a control circuit. The control circuit uses the voltage distribution resistor 23 of the water supply float switch 13.
And the voltage level generated from the current limiting resistance 24
The NOT • IC25 and NOT • IC26 are respectively inverted signals. In addition, heating humidification permission contact (thermo O
N) 14 is also a logic IC, NOT-IC 29, which controls the voltage level generated from the voltage distribution resistor 27 and the current limiting resistor 28.
And NOT-IC30 are used as inverted signals.

The outputs of the preceding logic ICs of the water supply float switch 13 and the heating / humidification permission contact (thermo ON) 14 are logically operated by the NAND IC 31 and output. The output of the latter-stage logic IC is logically operated by the NOR IC 32 and output. The NAND IC31 and NOR I
The output of C32 is turned on / off between the transistor 35 and the transistor 36 via the current limiting resistors 33 and 34, respectively.
FF is decided.

Each of the transistors 35 and 36 has a circuit structure for inputting a signal to a high water level timer IC 37 and a low water level timer IC 38.
The outputs of C37 and 38 are the reverse current prevention diode 3 respectively.
9 and the reverse current prevention diode 40 are combined, and the transistor 42 is turned on / off through the current limiting resistor 41.
Is controlled to operate the water supply abnormality output relay 43. Further, the air conditioner operation signal contact 15 controls ON / OFF of the transistor 46 at the voltage level generated by the voltage distribution resistor 44 and the current limiting resistor 45 as in the above signals.

The signal output of the transistor 46 is connected to the reset terminals of the high water level timer IC 37 and the low water level timer IC 38. Reference numeral 47 is a set time changeover switch of the high water level timer IC 37, and likewise 48 is a set time changeover switch of the low water level timer IC 38. B contact 49 of the water supply abnormality output relay 43
Is connected in series between the power supply and the water supply abnormality output relay 43 for flicker operation, and the a contact of the water supply abnormality output relay 43 is used as an abnormality signal output contact 50 to output an abnormality signal to the outside. It is configured. Reference numeral 51 is a designation switch for designating whether the form of the abnormal signal is a continuous contact signal or an intermittent contact signal, and 52 is a continuous detection permission switch.

In the above embodiment, the water supply float switch 8, NOT.IC 25, 26, 29,
30, NAND-IC31, and NOR-IC32 constitute a main part of the water level signal output means, and the transistor 35
And a high water level timer IC37 constitutes a high water level timer,
The transistor 36 and the low water level timer IC38 constitute a low water level timer, the backflow prevention diodes 39 and 40 constitute a signal combining circuit, and the transistor 42, the water supply abnormality output relay 43, the b contact 49, and the a contact abnormal signal output. An abnormal signal output circuit is configured with the contact 50, and the designated switch 5
1 constitutes the designating means.

Next, the operation will be described. FIG. 2 is a timing flowchart of a control circuit diagram of the monitoring device for the air conditioner humidifier. In FIG. 2, first, with the power turned on, the heating and humidifying permission contact (thermo ON) 1
Detecting ON / OFF of the water supply float switch 13 when 4 is ON and the air conditioner operation signal contact 15 is ON, either the high water level timer IC 37 or the low water level timer IC 38 starts timer counting. (In this embodiment, it is assumed that the water supply float switch 13 is in the ON state.)

While the timer is counting, the air conditioner operation signal contact 15 is in an OFF state (for example, thermo is OFF).
Then, the timer count is interrupted, and the timer count is restarted from the time when the timer is turned on.
Next, when the heating / humidification permission contact (thermo ON) 14 is turned off while the high water level timer IC 37 is counting the timer, the high water level detection is reset, and the low water level timer IC 38 starts the timer counting. This operation is performed by the water supply float switch 13
ON / OFF is detected and the inversion alternate detection is always continued.

Whether the high water level timer IC 37 exceeds a predetermined high water level limit time or the low water level timer IC 38
Is counted up by exceeding the predetermined low water level limit time, the backflow prevention diodes 39, 4
The excitation coil of the water supply abnormality output relay 43 is excited via the signal synthesis circuit configured by 0. Here, when the designated switch 51 is switched to the continuous signal side, the abnormal signal output contact 50 is kept in the ON state and a continuous contact signal is obtained. When the changeover switch 51 is switched to the intermittent signal side, the b water contact 49 of the water supply abnormality output relay 43 causes the water supply abnormality output relay 43 to flicker, so that, for example, the contact is interrupted for about 200 ms to 300 ms. The humidification abnormality signal output contact 50 is ON
A contact signal that repeatedly turns on / off is obtained.

An abnormality in the water supply system around the humidifier can be known from the abnormality signal in the signal form of either the continuous contact signal or the intermittent contact signal described above.

The humidification characteristic line of the natural evaporation type humidifier will now be described with reference to FIG. 3. In the case of the natural evaporation type humidifier 5, the humidification capacity of the natural evaporation type humidifier 5 changes greatly depending on the ambient temperature, and at the same time, the natural evaporation type humidifier 5 has Considering that the water supply time or evaporation time changes significantly depending on the capacity (for example, setting a natural evaporation type humidifier that matches the heating capacity of the indoor unit), the high water level limit time and low water level limit time By providing the set time changeover switches 47 and 48 for changing over, it is possible to arbitrarily set the limit time during which the high water level and the low water level continue, thereby providing versatility.

By repeating the respective functional operations and operations as described above, erroneous detection of an abnormal state is prevented and high-accuracy monitoring is performed in consideration of the time during which the humidifying capacity has deteriorated, such as during defrost or when the thermostat is stopped. In addition, the abnormal signal of the water supply system can be output in two forms: a continuous contact signal and an intermittent contact signal, which not only facilitates intelligent building support, but also increases the high water level of the water tank Being able to reliably monitor and detect various abnormalities in the water supply path that may appear such as abnormal water levels, to prevent a large amount of water being wasted due to leaks in the piping path, especially when the number of humidifiers is huge, such as in building applications. It can be expected that the water saving effect will be achieved and the energy saving effect will be achieved by reducing the power cost of the distribution pump.

[0024]

As described above, according to the present invention, the upper and lower limits of the liquid level in the water supply tank are detected,
By monitoring the duration of each, the abnormality of the water circuit is surely detected and the abnormality signal is output, so that it is possible to detect all the abnormal states of the water circuit that appear in the abnormality of the water level fluctuation of the water tank. can get. Also, by switching and designating the form of the abnormal signal into two types of signal forms, it is possible to cope very easily so that the abnormal signal is output in the form of intermittent contact signals required in intelligent buildings. As a result, it becomes unnecessary to modify the control panel by making a local arrangement, which is conventionally required, and various effects such as reduction of construction cost, reduction of time, and improvement of quality can be obtained.

In this way, by reliably detecting the abnormality in the water supply path and obtaining the abnormality signal in the desired signal form, a large amount of humidifier water for a humidifier, particularly in a building application or the like, or in the piping path is defective. A water saving effect can be obtained by preventing a large amount of water from being leaked, and an energy saving effect can be achieved by reducing the power cost of a water supply pump or the like.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of one embodiment of a humidifier monitoring device for an air conditioner according to the present invention.

FIG. 2 is a timing chart of main signals in the control circuit.

FIG. 3 is a humidification characteristic diagram of a general natural evaporation type humidifier used in the present invention.

FIG. 4 is a configuration diagram of an air conditioner indoor unit incorporating a natural evaporation type humidifier used in the present invention.

FIG. 5 is a control circuit diagram of an example of a conventional humidifier monitoring device for an air conditioner.

[Explanation of symbols]

5 Humidifier for air conditioner 8 Float switch for water supply 25, 26, 29, 30 NOT • IC 31 NAND • IC 32 NOR • IC 8, 25, 26, 29, 30, 31, 32 Water level signal output means 37 High Water level timer 38 Low water level timer 39, 40 Backflow prevention diode (signal combining circuit) 43 Water supply abnormality output relay 49 b contact 50 Abnormal signal output contact 42, 43, 49, 50 Abnormal signal output circuit 51 Designated switch (designating means)

Claims (1)

[Claims] 1. A humidifier for an air conditioner that supplies moisture to the air to humidify it, a water supply tank that supplies water to the humidifier, and a water level of the water supply tank becomes a predetermined high water level. To a predetermined low water level, and a water level signal output means for outputting a high water level signal that continues until a predetermined low water level and a low water level signal that continues until a predetermined high water level is reached. In a monitoring device for a humidifier for a conditioner, a high water level timer that outputs a high water level abnormal signal when the duration of the high water level signal exceeds a predetermined high water level limit time, and the duration of the low water level signal is a predetermined low water level signal. A low water level timer that outputs a low water level abnormal signal when the water level limit time is exceeded, and a signal combining circuit that outputs an abnormal signal when at least one of the high water level abnormal signal and the low water level abnormal signal is input, and Abnormal signal An abnormal signal output circuit that outputs a continuous contact signal or an intermittent contact signal when is input, and a specifying unit that specifies the signal output from the abnormal signal output circuit as a continuous contact signal or an intermittent contact signal And a humidifier monitoring device for an air conditioner.