JP3710449B2 - Air conditioning system operation switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation switch section of an air conditioning system used in, for example, a hotel or a hospital.
[0002]
[Prior art]
Until now, in an air conditioning system used in hotels, hospitals, etc., a mechanical rotation type has been often used as an operation switch unit for controlling the fan coil motor. This mechanical rotation type has the disadvantage that the operation is troublesome because it is necessary to operate it by rotating the knob by hand. Therefore, in recent years, instead of this, a touch-type operation switch unit has been frequently used.
In the air conditioning system controlled by the touch-type operation switch unit, the power supply circuit is provided not on the operation switch unit side but on the air conditioner body. This is because a large-sized transformer is used for the power supply circuit and cannot be provided in the operation switch unit.
Therefore, the power supply circuit is reduced in size by providing a diode bridge that changes commercial AC voltage to DC voltage and a capacitor that protects it, and the power supply circuit is combined with other circuits into one integrated circuit and provided in the operation switch unit. Accordingly, an operation switch unit of an air conditioning system has been developed that simplifies the air conditioning system and is low in manufacturing cost and easy to maintain (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Utility Model Registration No. 3069634 [0004]
[Problems to be solved by the invention]
For example, as shown in FIG. 4, the operation switch unit of the air conditioning system of Patent Document 1 has five lead wires in the wiring of the power supply circuit 11 in order to secure the power supply of the control circuit 12 provided in the switch unit 10. Further, one side A and the other side B of the AC power source 20 and lines for selecting H (HIGH high), M (MID medium), and L (LOW low) air volumes are required.
However, many of the general-purpose operation switch units have four lead wires, that is, the other side B of the AC power supply 20 and the air volume of H (HIGH HIGH), M (MID medium), and L (LOW low) are selected. Therefore, when the air conditioning system is replaced by renewal or the like, the operation switch part of the air conditioning system of Patent Document 1 cannot be used as it is.
In FIG. 4, the selection of the air volumes H, M, and L is performed when a pushbutton switch (not shown) corresponding to the air volume provided in the control circuit 12 is turned on, and the relay operates, and the corresponding open / close contacts 13, 14, 15 Is done by opening and closing.
[0005]
Therefore, an object of the present invention is to enable a power supply circuit together with a control circuit to be integrated into a single integrated circuit and provided in an operation switch unit even in a system having a power supply circuit that can take only four existing lead wires. Thus, it is intended to simplify the air conditioning system, and to provide an operation switch portion of the air conditioning system that is inexpensive to manufacture and easy to maintain and renew.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the operation switch part of the air conditioning system according to claim 1 of the present invention is connected to one side (A) of the AC power source (20) and is provided on the side of the air conditioner main body, and is primary. An air conditioning system that determines on / off and air volume of a single-phase motor (30) having a secondary coil (32 to 34) composed of three coils connected in series with the coil (31), and that is independent from the air conditioner body side The operation switch part of
One end side (for example, anode side) between two points between the secondary coils (32 and 33, 33 and 34) of the single phase motor (30) and between the primary coil (31) and the secondary coil (34), respectively. ) Are connected to three diodes (41-43),
The one where the other end side (for example, cathode side) of the three diodes (41 to 43) is connected to one and the other (B) of the AC power source (20) are input terminals, and the input AC A power supply circuit (21) for converting the voltage into a DC voltage and outputting it;
Pushbutton switches (60-63) for selecting on / off of the air conditioner and air flow, relays (71-73) for operating the single-phase motor (30) with the respective airflows, and the pushbutton switch (60-63) and the controller provided between the said relays (71-73) which outputs the signal which drives the relay (71-73) according to the ON / OFF signal of a pushbutton switch (60-63) And a control circuit (22) connected to the power supply circuit (21) and supplied with a DC voltage converted by the power supply circuit (21), and
The relays (71 to 73) are closed / opened corresponding to the presence / absence of the drive (ie, closed when the drive is present, and opened when there is no drive), and one end of the diode (41 to 43) corresponding thereto. ), And three open / close contacts (51-53) connected to the other end (B) of the AC power source (20) with one end connected to the other end (for example, the anode side). ,
When one (eg, 51) of the open / close contacts (51-53) is closed, the diode (41) connected to the closed open / close contact (eg, 51) is connected to the power supply circuit (20). Although no voltage is supplied, an induced voltage generated by the interaction of the secondary coil is supplied from the remaining two diodes (42, 43) to the power supply circuit (20).
[0007]
Moreover, the operation switch part of the air conditioning system according to claim 2 of the present invention is a middle diode among the three diodes (41 to 43) connected to the three coils (32 to 34) of the secondary coil. (42) is eliminated and short-circuited.
[0008]
Symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and embodiments of the invention described later.
[0009]
According to the operation switch part of the air conditioning system described in the present invention, the induced voltage generated by the interaction of the secondary coil is supplied to the power supply circuit via the diode, regardless of which one of the three switching contacts is closed. The existing four lead wires (the other side of the AC power supply, for example, a line for selecting the air volume of H (HIGH high), M (medium MID), L (LOW low)), etc. Even in a system having a power supply circuit that can only be obtained, the power supply circuit together with the control circuit can be integrated into one integrated circuit and provided in the operation switch unit.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
With reference to FIG. 1 thru | or FIG. 3, the operation switch part 1 of the air conditioning system which concerns on embodiment of this invention is demonstrated. In addition, the same code | symbol was attached | subjected to the same part as the thing of FIG. 4 shown in the prior art example.
The operation switch unit 1 determines on / off and air volume of the single-phase motor 30 and is independent from the air conditioner main body side. The single-phase motor 30 is connected to one side A of the AC power supply 20 and is provided on the air conditioner main body side, and has a secondary coil composed of three coils 32, 33, and 34 connected in series with one primary coil 31. Have. A capacitor 35 is interposed between the coil 31 and the coil 32.
[0011]
The operation switch unit 1 includes a power supply circuit 21, a control circuit 22, a power supply circuit 21, and three diodes 41, 42, and 43 provided between the power supply circuit 21 and the single-phase motor 30. Formula contacts 51, 52, and 53 are provided and are integrated into one integrated circuit. The anode side of the first diode 41 is connected between the coil 32 and the coil 33 which are secondary coils, and the anode side of the second diode 42 is the coil 33 and the coil 34 which are also secondary coils. The anode side of the third diode 43 is connected between the coil 34 and the primary coil 31.
[0012]
In the power supply circuit 21, the cathode side of the three diodes 41, 42, 43 is connected to one, and the other side B of the AC power supply 20 is an input terminal, which is input by the circuit shown in FIG. The AC voltage is converted into a DC voltage and output.
That is, 100V commercial AC voltage input from the port is converted into a 24V AC voltage lower than that by the electrolytic capacitor 91 provided between the ports. Then, it is converted into a DC voltage Vee of 24 V by the function of the transistor 92 and the Zener diode 93 connected in parallel to the electrolytic capacitor 91 and the resistor 94 provided between the transistor 92 and the Zener diode 93. Thereafter, the voltage is converted to a DC voltage Vcc of 5 V by an electrolytic capacitor 95 provided in parallel with a series circuit including a transistor 92 and a Zener diode 93.
[0013]
Further, as shown in FIG. 3, the control circuit 22 has push button switches 60 (for on / off), 61 (for air volume L (LOW)), 62 (for selecting air conditioner on / off and air volume). Airflow M (for MID medium), 63 (for airflow H (HIGH)), and relays 71, 72, 73 corresponding to the airflows L, M, H for operating the single-phase motor 30 at the respective airflows; A controller (CPU) 80 is provided between the pushbutton switches 60 to 63 and the relays 71 to 73 and outputs a signal for driving the relays 71 to 73 in response to the on / off signals of the pushbutton switches 60 to 63. are doing. The controller (CPU) 80 is connected to a thermistor 81 and an LCD display 82 capable of displaying the temperature, the status of the selection switch, and the like. The controller (CPU) 80 is supplied with the 5V DC voltage Vcc converted by the power supply circuit 21, and the relays 71 to 73 are supplied with the 24V DC voltage Vee converted by the power supply circuit 21. ing.
[0014]
The three open / close contacts 51 to 53 are closed / open corresponding to the presence / absence of driving of the relays 71 to 73, and one ends of the open / close contacts 51 to 53 are respectively connected to the anode sides of the corresponding diodes 41 to 43. The other end is connected to the other side B of the AC power supply 20.
[0015]
It should be noted that the anode side and the cathode side of the diodes 41 to 43 are reversed, that is, the cathode side is connected to the coils 31 to 34 and the anode side is connected together and input to the power supply circuit 21. Good.
[0016]
When the power source 20 is turned on, the open / close contacts 51 to 53 corresponding to the relays 71 to 73 are open. Therefore, 100 V AC voltage half-wave rectified by the diodes 41 to 43 is applied to the power supply circuit 21, and the control circuit 22 is driven by the voltages Vee and Vcc converted to DC by the power supply circuit 21.
[0017]
Next, for example, when the pushbutton switch 61 for designating the air volume to L is turned on, the output relay 71 is activated and only the open / close contact 51 is closed, so that no voltage is supplied from the diode 41 to the power supply circuit 21. However, at this time, the induced voltage generated between the coils 32 and 33 due to the interaction between the coil 32 and the coil 33 is supplied to the power supply circuit 21 from the diode 42, and the coil 32 and the coil are supplied from the diode 43. The induced voltage generated between the coils 32 and 34 due to the interaction of 34 is supplied to the power supply circuit 21. The induced voltage at this time is 20 to 30 V when the single-phase motor 30 is 30 W.
[0018]
Further, for example, when the pushbutton switch 62 for designating the air volume to M is turned on, the output relay 72 is activated and only the open / close contact 52 is closed, so that no voltage is supplied from the diode 42 to the power supply circuit 21. However, at this time, the induced voltage generated between the coils 32 and 33 due to the interaction between the coil 32 and the coil 33 is supplied from the diode 41 to the power supply circuit 21, and the coil 43 and the coil 34 are supplied from the diode 43. The induced voltage generated between the two coils 33 and 34 due to the above interaction is supplied to the power supply circuit 21.
Furthermore, for example, when the pushbutton switch 63 for designating the air volume to H is turned on, the output relay 73 is activated and only the open / close contact 53 is closed, so that no voltage is supplied from the diode 43 to the power supply circuit 21. However, at this time, the induced voltage generated between the coils 32 and 34 due to the interaction between the coil 32 and the coil 34 is supplied from the diode 41 to the power supply circuit 21, and the coil 42 and the coil 34 are supplied from the diode 42. The induced voltage generated between the two coils 33 and 34 due to the above interaction is supplied to the power supply circuit 21.
[0019]
In this way, even if any one of the three open / close contacts 51 to 53 is closed, the voltage can be supplied to the power supply circuit 21 via the diode, so that the control circuit 22 can be reliably connected. Can be driven.
Note that only one of the open / close contacts 51 to 53 is selected and closed, and two or more contacts are not closed simultaneously. The diodes 41 to 43 have a function of preventing current from flowing in from other circuits when the contacts are closed.
[0020]
In order to stop the operation of the air conditioner body, the push button switch 60 of the control circuit 22 is pushed. Thereby, the supply of the power supply voltage supplied to the power supply circuit 21 and the control circuit 22 is stopped, the single-phase motor 30 is stopped, and the air conditioning system is stopped.
[0021]
According to this embodiment, the existing four lead wires (the other side B of the AC power supply 20 and the line for selecting the air volume of H (HIGH high), M (medium MID), L (LOW low)) Even in a system having the power supply circuit 22 that can only be obtained, the power supply circuit 21 together with the control circuit 22 can be integrated into one integrated circuit and provided in the operation switch unit 1.
[0022]
In the present embodiment, the open / close contacts 51 to 53 are used, but a semiconductor non-contact can be used instead.
In expensive air conditioning systems that perform temperature control, semiconductor contactless devices such as triacs are often used instead of contacts, but in the case of contactless devices, leakage current is inevitably generated and a small alternating current flows to the single-phase motor 30. For this reason, the single-phase motor 30 continues to move slightly, and the fan may not stop completely. However, in this embodiment, only a half-wave current flows through the single-phase motor 30 due to the diode, so that the fan stops completely. It has become.
[0023]
Further, even if the middle diode 42 among the three diodes 41 to 43 connected to the three coils 32 to 34 of the secondary coil is eliminated and short-circuited, the voltage is supplied to the power supply circuit 21 and the control circuit 22 is controlled. It can be driven reliably.
[0024]
【The invention's effect】
According to the operation switch part of the air conditioning system described in the present invention, the induced voltage generated by the interaction of the secondary coil is supplied to the power supply circuit via the diode, regardless of which one of the three switching contacts is closed. The existing four lead wires (the other side of the AC power supply, for example, a line for selecting the air volume of H (HIGH high), M (medium MID), L (LOW low)), etc. Even in a system having a power supply circuit that can only be obtained, the power supply circuit together with the control circuit can be integrated into one integrated circuit and provided in the operation switch unit.
As a result, the air conditioning system can be simplified, and an operation switch portion of the air conditioning system can be obtained that is inexpensive to manufacture and easy to maintain and renew.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an outline of an operation switch unit of an air conditioning system according to an embodiment of the present invention.
2 is a circuit diagram showing a power supply circuit provided in the operation switch unit shown in FIG. 1; FIG.
3 is a circuit diagram showing a control circuit provided in the operation switch section shown in FIG. 1; FIG.
FIG. 4 is a block diagram showing an outline of an operation switch unit of an air conditioning system according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation switch part 10 Operation switch part 11 Power supply circuit 12 Control circuit 13,14,15 Switch-type contact 20 AC power supply 21 Power supply circuit 22 Control circuit 30 Single phase motor 31 Primary coil 32,33,34 Secondary coil 35 Capacitor 41, 42, 43 Diode 51, 52, 53 Open / close contact 60, 61, 62, 63 Pushbutton switch 71, 72, 73 Relay 80 Controller (CPU)
81 Thermistor 82 LCD Display 91 Electrolytic Capacitor 92 Transistor 93 Zener Diode 94 Resistor 95 Electrolytic Capacitor

Claims (2)

Determines on / off and air volume of a single-phase motor having a secondary coil composed of three coils connected to one side of the AC power source and connected to the air-conditioner main body in series with the primary coil. It is an operation switch part of the air conditioning system independent from the main body side,
Three diodes each having one end connected between the two points between the secondary coils of the single-phase motor and the primary and secondary coils;
A power supply circuit in which the other end of the three diodes is connected to one and the other of the AC power supply is an input terminal, and the input AC voltage is converted into a DC voltage and output;
A pushbutton switch for selecting on / off of the air conditioner and an air volume, a relay for operating the single-phase motor at each airflow, and a pushbutton switch provided between the pushbutton switch and the relay. A controller that outputs a signal for driving the relay in response to an on / off signal, a control circuit connected to the power supply circuit and supplied with a DC voltage converted by the power supply circuit; and
The relay is closed / open corresponding to the presence / absence of driving of the relay, and one end is connected to one end side of the corresponding diode, and the other end is connected to the other side of the AC power source. An open / close contact,
When one of the switch contacts is closed, no voltage is supplied from the diode connected to the closed switch contact to the power supply circuit, but from the remaining two diodes due to the interaction of the secondary coil. An operation switch unit of an air conditioning system, wherein the generated induced voltage is supplied to the power supply circuit. The operation switch part of the air-conditioning system according to claim 1, wherein among the three diodes connected to the three coils of the secondary coil, the middle diode is eliminated and short-circuited.

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