KR102521620B1 - independent filter apparatus of management efficiency - Google Patents

Abstract

In an air cleaning system in which air introduced to the outside is supplied to a room through a filter box equipped with a differential pressure sensor module, the independent performance cycle management type filter management detects the filter replacement cycle in the filter box. It's about the device.
A specific feature of the present invention is a microcontroller unit (MCU) that is operated by a battery (V) and has a processor, memory, and input/output device inside a single chip, and when the output of the MCU is applied, battery power is supplied to the rear end. An MCU and a driving unit consisting of a driving unit supplying a circuit to be connected; an IR receiver inputting IR reception information to the MCU when an IR signal is input from an external device; a differential pressure sensor unit connected to a rear end of the drive unit, supplied with power by the drive unit, and inputting pressure difference information sensed by the differential pressure sensor module to the MCU; It includes an IR transmitter for transmitting the filter state value output from the MCU to the outside.

Description

Independent filter apparatus of management efficiency}

The present invention relates to a stand-alone performance cycle management type filter device using a battery without supplying an external power source to predict a replacement time by diagnosing the degree of contamination and lifespan of a built-in filter in an air conditioning facility.

Patent Application No. 10-2020-7007031 (Title of Invention: Air Filter State Detection) (hereinafter referred to as 'prior art') installs pressure sensors in the air filter to detect the state of the air filter, and these pressure sensors Information obtained from the information is received by information devices including smart phones to confirm the replacement cycle of the air filter. However, in this prior art, in order to extract information from a pressure sensor, perform information processing based on the pressure information, and propagate it to the outside through a wireless communication device (antenna), the configuration and function implementation of the device are required. Since relatively large power consumption is required for this, it is very difficult to construct a non-powered control facility, and when a battery is used, a management problem arises in that the battery must be replaced frequently because its lifespan is shortened.

1 is a configuration diagram of a conventional air conditioning system.

1 shows that four HEPA box filter-type air conditioners (1), (2), (3), and (4) are installed on the ceiling of a room, and the air conditioners filter the air sucked from the integrated outdoor unit (10) and supplying clean air. In addition, a pressure sensor 20 is installed in the room, and the detection signal detected by the pressure sensor 20 is supplied to the integrated outdoor unit 10, and when the detection signal is weaker than the standard amount, the intake air amount of the integrated outdoor unit 10 is increased. The clean air supplied to the room is increased, and when the amount is greater than the reference amount, the intake air amount of the integrated outdoor unit 10 is reduced to reduce the clean air supplied to the room.

HEPA filter is used as a core technology of clean form in various fields such as medical, industrial, military, etc. due to its high dust collection efficiency. Due to the fact that the filter is impossible to wash due to its nature, the air passage rate decreases due to the increase in pressure loss when used for a long period of time. Eventually, when a constant amount of air is supplied from the integrated outdoor unit 10, the pressure sensor 20 detects it according to the elapsed time. The pressure value will gradually decrease. In this case, the integrated outdoor unit 10 increases the amount of air blown to maintain the pressure value sensed by the pressure sensor 20 at a constant pressure value, and uniformly injects increased air into each air conditioner.

However, when using an air conditioner in the field, when the air resistance of a filter of a specific air conditioner increases due to excessive contamination, the pressure in the pressure sensor 20 is lowered, and the increased air flow rate from the integrated outdoor unit 10 is uniform. Since it is supplied to the air conditioners (1), (2), (3), and (4), the desired amount of air flow is not increased in the air conditioner with the contaminated filter, and an excessive increase in air flow is caused in other air conditioners. This will lead to unreasonable results.

In order to solve this problem, an independent pressure sensor is installed in each air conditioner (1), (2), (3), and (4), and the signal sensed by them is transmitted to the outside and the filter condition inside each air conditioner is received. It is necessary to determine whether the filter is contaminated and manage the filter replacement cycle, but extract the filter status information from the air conditioning equipment that has already been installed and connect the power line to propagate the wireless signal to the antenna. Again, it was very difficult to carry out, and since the air conditioner in use provides a source of contamination according to the construction, it was practically impossible to carry out the construction.

The present invention is to solve these problems, and the problem of the present invention is to embed an independent performance cycle management type filter device in the air conditioning unit constituting the air conditioning system, and to install a pressure sensor inside the filter device and detect it from the pressure sensor. In constructing a device that extracts a signal and propagates it to the outside, an independent power cycle management device that operates at low power composed of an independent power supply device with a battery is used to provide long-term battery life without separate power construction to the existing air conditioner. It is to provide an air conditioning facility having an independent performance cycle management type air conditioner by maintaining its lifespan.

A solution for solving the above problems is an independent performance that detects the replacement cycle of the filter in the filter box in an air conditioner in which air introduced from the outside is supplied to a room through a filter box equipped with a differential pressure sensor module. In the cycle management type filter management device: a micro controller unit (MCU) operated by a battery (V) and having a processor, memory, and input/output device inside a single chip, and a battery when the output of the MCU is applied An MCU and a driving unit including a driving unit supplying power to a circuit connected to a rear end; an IR receiver inputting IR reception information to the MCU when an IR signal is input from an external device; a differential pressure sensor unit connected to a rear end of the drive unit, supplied with power by the drive unit, and inputting pressure difference information sensed by the differential pressure sensor module to the MCU; An IR transmission unit for transmitting a filter state value output from the MCU to the outside, and the driver includes a transistor Q1 and a transistor Q2 for supplying or blocking power (V) of the battery to the differential pressure sensor unit. The power source V is applied to the collector of the transistor Q1, the collector of the transistor Q2 is connected to the base, and the latch_on from the MCU is connected to the base of the transistor Q2. When a signal is supplied, it is turned on and conducted to supply the power supply (V) to the differential pressure sensor unit, and when a latch_off signal is supplied from the MCU, the power supply (V) is supplied to the differential pressure sensor unit. It is a latch circuit that blocks, and the differential pressure sensor unit includes a power noise filter that removes noise of power input from the transistor Q1, and a high pressure unit (air inlet unit) from the differential pressure sensor module of the filter box. ) and the low pressure part (air outflow part), and a differential pressure sensor that outputs a differential pressure signal by integrating the pressure difference with the output value of the reference gain IC (Reference Gain IC), and the differential pressure sensor It consists of a signal noise filter for filtering the noise of the signal of the pressure detector, and a signal amplifier for amplifying the signal passing through the noise filter of the signal and outputting it to the MCU.

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According to the present invention having the above problems and solutions, in the independent performance cycle management type filter device of the present invention, the MCU supplies differential pressure information to the differential pressure sensor unit through the IR latch circuit only when the IR signal is transmitted from the outside by the IR receiver unit. Since it is a very low power consumption type because it is requested to do so, an independent battery can be used, and an independent performance cycle management type filter device is installed in the filter box of the existing air conditioning unit without separate power construction, By driving this with a battery, it is possible to improve the filter management of the air conditioner constituting the air conditioner very conveniently.

In addition, through such facility improvement, it is possible to efficiently perform history management of filters inside the air conditioner constituting each air conditioner.

1 is a configuration diagram of a conventional air conditioning system.
Figure 2 is a configuration diagram for individually explaining the overall configuration of the present invention.
3 is an overall circuit diagram of the present invention.
4 is a flowchart illustrating the operation sequence of the MCU of the present invention.
5 is a block diagram of a data receiving apparatus according to the present invention.
6 is an exemplary view of a form created by the data program of the present invention.

Figure 2 is a configuration diagram for individually explaining the overall configuration of the present invention.

A differential pressure sensor module 30 is installed in each filter box 20 of the air conditioners 11, 12, 13, and 14 shown in FIG. Air is blown and introduced into each of the air conditioners 11, 12, 13, and 14, and the introduced air passes through a filter box 20 in which a plurality of filters including a HEPA filter are installed, room) enters. In addition, the differential pressure sensor module 30 is a sensor installed in the filter to detect a pressure difference between a low pressure part and a high pressure part, and detects a pressure difference that increases when contaminants accumulate in the filter. In addition, each of the air conditioners 11, 12, 13, and 14 has an independent performance cycle management device 100 for managing filter replacement by detecting the signal of the differential pressure sensor module 30 and using the detected signal. is installed

Figure 3 is an overall circuit diagram of the present invention, Figure 4 is a flow chart explaining the operation sequence of the MCU of the present invention.

The independent performance cycle management device 100 is operated by a battery V and when a micro controller unit (MCU) having a processor, memory, and input/output device inside a single chip and the output of the MCU are applied, battery power is applied. When an IR signal is input from an external device such as an MCU and a drive unit 110 consisting of a drive unit with a latch function that applies a Latch function to a circuit at a later stage, a separate device or an IR receiver that inputs IR reception information to the MCU ( 130), a differential pressure sensor unit 120 that inputs the pressure difference information sensed by the differential pressure sensor module 30 to the MCU, and an IR transmitter 140 that transmits the filter state value output from the MCU to the outside.

Hereinafter, the operation process of the present invention will be described.

When an IR signal from a separate device or remote control is input to the receiving photodiode PD1 of the IR receiving unit 130, the receiving photodiode PD1 conducts and the input signal is input through an input filter (Input), an automatic gain controller (AGC), Passing through a band pass filter and a demodulator, the transistor Q3 is conducted to supply the receiving input signal to the IR receiving input terminal of the MCU (step ①).

The MCU outputs a latch_on signal that operates the driving unit when the reception input signal is input, and when the latch_on signal is output, the driving unit composed of transistors Q1 and Q2 supplies the battery power (V) to the differential pressure sensor unit 120. ) to supply Since voltage V is applied to the collector of the transistor Q1 of the driving unit, the base is connected to the collector of the transistor Q2, and the base of the transistor Q2 is connected to the latch_on signal output terminal of the MCU, the latch_on is latched on. The signal is output to activate the transistor Q1 so that the battery power V is normally supplied to the differential pressure sensor 120 (step ②).

The differential pressure sensor unit 120 includes a power noise filter that removes noise of power input from the transistor Q1, and a high pressure part (air inlet part) and a low pressure part from the differential pressure sensor module 30 of the filter box ( A differential pressure sensor that detects the pressure difference of the air outlet) and integrates it with the output value of the reference gain IC to output a differential pressure signal, and filters the noise of the signal of the differential pressure sensor It consists of a signal noise filter and a signal amplifier, and the output from the signal amplifier is input to the MCU (step ③).

When the differential pressure signal is input from the signal amplifier in step ③, the MCU modulates the differential pressure signal into a PWM (Pulse Width Modulation) state signal and outputs it to the IR transmitter 140 (step ④). The IR transmitter 140 receives the PWM status signal, passes through a signal filter and a signal amplifier, and outputs it as a status output signal from the oscillation IC (NE555), and the status output signal is an optical transmission photodiode In (PD2), it is converted into an IR optical signal and transmitted to the outside. When the IR optical signal is transmitted to the outside in this way, the MCU outputs a latch_off signal to the driver (steps ⑤ and ⑥). When the latch_off signal is output from the MCU, the activated differential pressure sensor unit 120 is operated in a standby mode, thereby minimizing the consumption of the battery during normal times and significantly extending its lifespan.

5 is a configuration diagram of a data receiving apparatus of the present invention, and FIG. 6 is an exemplary view of a form prepared by the data program of the present invention.

The data receiving device is made in the form of a smart phone and a remote control, as shown in FIG. A conduction signal is applied to the base of the transistor Q4 through a band pass filter and a demodulator, and an MCU receiving data as the transistor Q4 is conducted, and a memory (SD) storing the data of the MCU Memory), an HMI that reads the data of a specific address of the memory in the MCU, writes it in a predetermined form, inputs what to display, and displays it, and FIG. 5 is an example of one of the predetermined forms. The form shown in FIG. 6 is created by a data management program that can be checked at a glance to facilitate overall management of the filter box differential pressure sensor module, and functions to display updated information through inspection and inform maintenance time. provides

10: Integrated outdoor unit
11, 12, 13, 14: air purifier
20: filter box
30: differential pressure sensor module
100: Independent performance cycle management device
110: MCU and driving unit
120: differential pressure sensor unit
130: IR receiver
140: IR transmitter

Claims (4)

In an air conditioner in which air introduced from the outside is supplied to a room through a filter box equipped with a differential pressure sensor module, an independent performance cycle management type filter management device detecting a filter replacement cycle in the filter box includes:
A micro controller unit (MCU) that is operated by a battery (V) and has a processor, memory, and input/output device inside a single chip, and when the output of the MCU is applied, battery power is supplied to the circuit connected to the rear end. MCU and a driving unit consisting of a driving unit to;
an IR receiver for inputting IR reception information to the MCU when an IR signal is input from an external device;
a differential pressure sensor unit connected to a rear end of the drive unit, supplied with power by the drive unit, and inputting pressure difference information sensed by the differential pressure sensor module to the MCU;
An IR transmitter for transmitting the filter state value output from the MCU to the outside;
The driver includes a transistor Q1 and a transistor Q2 that supply or block the power source V of the battery to the differential pressure sensor unit, and the power source V is applied to the collector of the transistor Q1. , The collector of the transistor Q2 is connected to the base, and when a latch_on signal is supplied from the MCU to the base of the transistor Q2, it is turned on and conducted, thereby supplying the power supply V to the differential pressure sensor unit. A latch circuit that blocks supply of the power source (V) to the differential pressure sensor unit when a latch_off signal is supplied from the MCU,
The differential pressure sensor unit includes a power noise filter that removes noise of power input from the transistor Q1, and a pressure difference between a high pressure unit (air inlet) and a low pressure unit (air outlet) from the differential pressure sensor module. A differential pressure sensor that detects and integrates the pressure difference with the output value of a reference gain IC to output a differential pressure signal, and a signal noise filter that filters noise of the signal of the differential pressure sensor (Signal Noise Filter) and a signal amplifier (Signal Amp) that amplifies the signal passing through the noise filter of the signal and outputs it to the MCU. delete delete The independent performance cycle management type filter device according to claim 1 , wherein the MCU modulates the pressure difference information into a PWM (Pulse Width Modulation) state signal when the pressure difference information is input from the differential pressure sensor unit and outputs the output to the IR transmitter.

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