JPH0429323Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an air conditioner as a terminal in a central control device for an air conditioner that uses an air conditioner as a terminal and centrally controls a plurality of these terminals. It is.

[Prior Art] When a large number of terminal devices such as total heat exchange type air conditioners are installed in separate locations, a control system that can operate all of these terminal devices at once is required.
Conventionally, a terminal device installed in this manner is configured as a control type terminal as shown in FIG. 10. In other words, AC100V
of main switch 2 connected in series to power supply 1 of
The configuration is such that all the terminals 3 can be operated or stopped at once by an ON-OFF operation.

[Problems to be solved by the invention] Even though the conventional control system described above is somewhat complex in function, it is basically forced on/off control by the main switch 2, and each terminal The selection of unique features provided by 3 is largely ignored. Therefore, the control of the terminal device 3 is uniform and difficult to use. Furthermore, the electrical circuit connections between the air conditioners as the terminal device 3 are configured as shown in FIG. (See Figure 11).

The present invention was developed to solve the above-mentioned conventional problems.In addition, interconnection is simple and easy, it is easy to configure a centralized control device using multiple air conditioners, and the electronic actuator has stable control characteristics. The purpose of the present invention is to obtain an air conditioning system with good maintainability that exhibits the following characteristics and is capable of automatic operation and programmed operation.

[Means for Solving the Problems] The air conditioner according to this invention has an air conditioner that is formed in an outer casing and intersects an exhaust air passage with a built-in heat exchanger in an intermediate part so as to be able to exchange heat. An electronic actuator that directly controls and operates the air conditioner from outside the outer casing is removable on the ceiling surface of the trapezoidal air duct in the outer casing on the downstream side of the heat exchanger provided downstream of the air filter in the duct. It is inserted and attached to.

[Function] With this invention, the electronic actuator can be operated in a place with stable air conditions for many years, and stable control characteristics can be obtained. Improved dust resistance from outside wind infiltration, ease of assembly and disassembly, and improved maintainability.

[Example of the invention] As shown in Fig. 1, an air conditioner control device as an example of the invention is a system in which a plurality of air conditioners (hereinafter referred to as terminal devices 3) such as heat exchange type ventilation fans are installed. This is what I did. A handset 4 as an electronic actuator is built into each terminal 3, and the handsets 4 are connected to each other by two communication cables 6.
Each slave unit 4 is connected to one master unit 5 as an electronic operation device by a communication cable 6. The slave unit 4 operates according to the command data of the master unit 5, and the output unit such as a relay built in the slave unit 4 is operated. Accordingly, the terminal device 3 performs a predetermined function. AC power is supplied to the terminal device 3 from the power source 1 . The configurations of the base unit 5 and slave unit 4 are as shown in the block diagram of FIG. In the block diagram of the base unit 5, 10 is an operation command input switch that turns on and off the terminal unit 3 all at once, 11 is a strong/weak air volume input switch that commands air flow, etc., and 12 is a ventilation function, etc., that is, total heat exchange ventilation. A ventilation command input switch that commands either normal ventilation, 13 an address designation switch input that specifies how many terminals 3 are to be controlled by this base unit 5, and 14 a base unit 5 that will be described later.
15 is a control unit that performs the main control function; 16 is a control unit that performs data communication between the base unit 5 and each slave unit 4; Transmitting/receiving section, 2
4 is a display unit that monitors the status of the handset 4 and displays the status of the base unit 5. In addition, in the functional blocks of the handset 4 in FIG. A control unit that controls the sequence; 20 is an output unit composed of a relay etc. that electrically operates the terminal 3 according to the sequence; 21 is a terminal that indicates the speed control, damper, etc. of the motor etc. built into the terminal 3; The connection part 22 is an external input such as a bimetal thermometer (temperature sensor), a timer, etc. External input 23
This is the connection part.

In the base unit 5, slave unit 4, and terminal unit 3 configured in this way, the operation command input switch 1 is input from the base unit 5.
When 0 is input, the signal is transmitted to the control unit 15, and the transmitting/receiving unit 1 sends a signal to turn on the slave units 4 numbered 1 to n designated by the address designation switch input 13.
6 as data to all slave devices 4 from numbers 1 to n.
Emit ON command data. At the same time, the display unit 24 displays on the operation panel of the base unit 5 that the batch ON command has been issued. On the other hand, the signal transmitted from the base unit 5 is sent to the transmitting/receiving unit 1 of the slave unit 4 via the communication cable 6.
7, but since each address is specified in advance by the address designation switch section 18 in this handset 4, only when data corresponding to the own address is sent, the transmitter/receiver section treats the data as its own data. 17. The control unit 19 processes the captured data. After performing control processing in the control unit 19, for example, as described above, the main unit 5
When the ON command is issued, the relay of the output section 20 is activated, the power supply 1 is supplied to the terminal device 3, and the terminal device 3 enters the operating state. Further, when the handset 4 or the like is controlled by an external sensor or the like, such as when the handset 4 is operated by a timer, the input from the external input 23 is input to the control unit 19 of the handset 4, and appropriate sequence processing is performed.

Between the base unit 5 and the slave unit 4, first, the base unit 5
Address data and control content data corresponding to No. 1 handset 4 are transmitted to all handsets 4. Next, the corresponding handset 4 receives the address, takes in the control transmission data, transmits the address of the handset 4, and transmits the data contents of the handset 4. In this way, the main unit 5
After the slave unit 4 is polled and the last signal processing of number n is performed, the process returns to the No. 1 slave unit 4 and performs the same processing. If data changes during this time, new data will be sent and received at the next polling. Thus, a communication relationship between the master device 5 and the slave device 4 is established, and a control system is established. For example, No. 1
~No.n is connected, and if for some reason there is an abnormality in No.2 handset 4, No.
The transmission signal from the base unit 5 to the No. 1 handset 4 is transmitted to the handset 4, and the signal from the No. 1 handset 4 is sent back.
Next, even if the data is sent to the No. 2 slave unit 4, the base unit 5
If there is no reply from the No. 2 handset 4 within the reception period of the No. 2 handset 4, communication with the No. 2 handset 4 will not be established. Next, No. 3 handset 4 communicates in the same way, and if communication with No. 2 handset 4 is unsuccessful several times in a row, No. 2 handset 4 is abnormal in base unit 5. It is determined that this is the case, and the lamp display for communication abnormality in the display unit 24 of the base unit 5 shown in FIG. In this manner, the abnormality lamp display is lit and the lamp is turned off twice during this lighting period, so that the base unit 5 can determine that the No. 2 slave unit 4 is abnormal.

As shown in FIGS. 4 and 5, each child unit 4 has an intake air passage 27 and an exhaust air passage that intersect at an intermediate portion formed in the outer casing 25 so as to be able to exchange heat using a built-in heat exchanger 26. A heat exchanger 26 provided on the downstream side of the air filter in the exhaust air passage 28 of 28 is removably inserted into the ceiling surface of the trapezoidal air passage in the outer casing 25 on the downstream side. In the figure showing the handset 4, 29 is a control circuit board A comprising an electronic circuit;
30 is a plastic resin base on which the control circuit board A29 is slidably mounted and held, and on which a trapezoidal cylindrical metal cover 31 is slidably mounted;
The control circuit board A29 is engaged and held in the groove A32 inside the upper part of the resin base 30, and the guide allowance 33 formed on the edge of the metal cover 31 is slid into the groove B34 formed on the outside lower part of the resin base 30. Furthermore, the 6-pole connector 35 pulled out from the control circuit board A29 is attached to the opening of the cover metal fitting 36 from the inside, and the cover metal fitting 36 on which connection parts such as signal terminals are arranged is attached to the lower part of the resin base 30. By tightening the fixing screws 38 from the outside into the two grooves 37 formed in the metal cover 31, and further inserting the resin fixing pins 39 from the outer surface of the metal cover 31 to fix the cover fittings 36, as shown in FIG. You can get a handset 4 like this. The metal cover 31 has a trapezoidal box shape so as to maintain a constant distance from the slope of the heat exchanger 26. The resin base 30 of the handset 4 has one inward groove 40 inside each groove 37.
By engaging the groove portion 40 with the guide fitting 41 fixed to the outer casing 25 of the terminal device 4 and pushing it in, the slave device 4 is installed in the exhaust air passage 28 on the outdoor side of the terminal device 3 (the first (See Figure 4). Reference numeral 42 denotes a terminal block, and 43 denotes a heat radiation vent, which radiates the heat of the step-down transformer of the electronic circuit to the outside of the metal cover 31 by allowing the exhaust flow of the exhaust air path 28 to flow therethrough.

[Effects of the invention] As is clear from the above description of the embodiments, the air conditioner of the invention has an intake air passage and an exhaust air passage that are formed inside the outer casing and intersect in the middle part to enable heat exchange using a built-in heat exchanger. Directly controlling the air conditioner from outside the outer casing on the ceiling surface of the trapezoidal air duct in the outer casing on the downstream side of the heat exchanger provided downstream of the air filter in the exhaust air duct among the air ducts. Since the electronic actuator is removably inserted and installed, the electronic actuator can be operated in a place with stable air conditions for many years, and stable control characteristics can be obtained. Electrical insulation, dustproofness from outside wind intrusion in a certain direction, ease of assembly and disassembly, and maintainability are improved.

[Brief explanation of the drawing]

Figure 1 is a system configuration diagram of a central control device for air conditioners showing an embodiment of the present invention, Figure 2 is a front view of a terminal, and Figure 3 is a function diagram showing the relationship between the parent unit and slave units. 4 is an explanatory diagram showing the relationship between the handset and the terminal, FIG. 5 is an exploded perspective view of the handset, FIG. 6 is an enlarged sectional view of the arrow A in FIG. 5, and FIG. The figures are an enlarged view showing the arrow A in Fig. 1, Fig. 8 is a front view of the main unit, Fig. 9 is a circuit connection diagram, Fig. 10 is a system diagram showing a conventional example, and Fig. 11 is
It is a wiring diagram of a conventional example. In the figure, 1 is the power supply, 3
is a terminal device, 4 is a slave device, 5 is a base device, 6 is a communication cable, 16 is a transmitter/receiver section, 18 is an address designation switch section, 22 is a connection section, 23 is an external input, 25 is an outer casing, 26 is a heat exchanger 27 is an intake air path, 28 is an exhaust air path, 29 is a control circuit board A, 30 is a resin base, 31 is a metal cover, 32 is a groove A, 34 is a groove B, and 37 and 40 are grooves. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] The heat exchanger downstream is provided on the downstream side of the air filter in the exhaust air path of the intake air path and the exhaust air path that are formed in the outer casing and intersect in the intermediate part so as to be able to exchange heat by a built-in heat exchanger. An air device characterized in that an electronic actuator for directly controlling and operating the air conditioner from outside the outer casing is removably inserted into the ceiling surface of the trapezoidal air passage in the outer casing.