JPH05256503A - Controller for air conditioner - Google Patents

Abstract

PURPOSE:To enable the operation of an air conditioner to be controlled by both of an operation control unit in the air conditioner main body and a remote controller provided as a separate body by providing switches for checking the operation of relays for controlling power supply to electric apparatuses and operating these switches. CONSTITUTION:When a power source switch 34 is closed and each contact of a plurality of change-over switches 81, 82 is on (a) sides, respectively, the DC power supplied from the first terminal of a connector 43b is supplied to the (a) side of the change-over switch 82 through the power source switch 34 and a normally closed contact, and is supplied to a remote controller through a connector 30. Accordingly, an air conditioner can be operated by the remote controller. On the other hand, when the contacts are on (b) sides, the DC power supplied from the first terminal of the connector 43b is supplied to a selective switch 21 and a thermoswitch through a fan cycle switch 32. Accordingly, the air conditioner can be operated by the main body of the air conditioner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting a remote controller to an air conditioner having an operation controller in the main body of the air conditioner.

[0002]

2. Description of the Related Art As a conventional air conditioner control device, there is one described in Japanese Patent Application Laid-Open No. 3-233247. What is described in this publication is a control device mounted in the main body of an air conditioner, and operates a selection switch of the control device to give an operation signal to a compressor or a blower to control the operation of the air conditioner. Met.

[0003]

In the conventional air conditioner controller thus constructed, the air conditioner body has the selection switch. Therefore, when the air conditioner is operated, the air conditioner is operated by the user. I had to go to the main body of the harmony machine.

When the selection switch is provided separately from the main body of the air conditioner at a place convenient for the user,
It is necessary to add components such as relays and transformers to improve the electric circuit, and there is a problem in that the amount of electrical work required to install the air conditioner increases.

The present invention provides a control device for an air conditioner in which the operation controller is easily separated from the main body of the air conditioner by using a remote controller in order to solve such problems.

[0006]

The present invention has a refrigerating cycle in which a compressor, a heat source side heat exchanger, a pressure reducing device, and a use side heat exchanger are connected by a refrigerant pipe, and a controlled chamber detected by a temperature sensing section. In an air conditioner having an operation control unit that outputs an operation signal for the compressor or the like based on the temperature of the controller, the control device having the operation control unit includes an electric device for the compressor or the like in response to the operation signal from the operation control unit. A relay that controls the energization of the device, a remote controller that is separated from the air conditioner and outputs an operation signal for the compressor, and an electric circuit for supplying the operation signal to the relay through a diode from the remote controller. A connector for supplying an operation signal and a switch for preventing the operation of the relay by the operation signal from the operation control unit are provided.

[0007]

In the air conditioner control device configured as described above, when installing the air conditioner regardless of whether the user desires the operation control unit provided in the air conditioner body or the remote controller, The electrical work of can be done easily.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view in which the casing of the air conditioner is removed and a part is cut away. In the figure, 1 is a bottom plate of the air conditioner, which is a metal plate processed by sheet metal processing. Reference numeral 2 denotes a compressor, and the indoor heat exchanger 7, the outdoor heat exchanger 10, the four-way switching valve 4, and the pressure reducing device also constitute a refrigeration cycle. The indoor heat exchanger 7 acts as an evaporator, and the outdoor heat exchanger 1
When 0 acts as a condenser, the compressor 2, the indoor air blower, and the outdoor air blower are operated to perform cooling operation of the controlled room. Further, by switching the four-way switching valve so that the indoor heat exchanger 7 acts as a condenser and the outdoor heat exchanger 10 acts as an evaporator, it becomes possible to perform the heating operation of the controlled room.

A partition wall 3 divides the inside of the air conditioner into an outdoor Japanese room and an indoor Japanese room. The outdoor chamber has a compressor 2, an outdoor blower 12 (propeller fan), an outdoor heat exchanger 10, a fan casing 11, and the like. Reference numeral 13 denotes an electric motor provided on the outdoor side. When the electric motor is operated, the outside air sucked from the rear grill flows through the side portion of the outdoor heat exchanger 10,
The air is blown from the back of the fan casing 11 to the outdoor heat exchanger 10. Reference numeral 26 denotes a frosting detector provided on the outdoor heat exchanger side, and the contact piece is switched from the terminal H to the terminal L when the outdoor heat exchanger 10 is frosted.

The indoor side chamber has an indoor side blower 6 (sirocco fan), an indoor heat exchanger 7, an electric heater 9 and the like. The indoor blower 6 is connected to the rotary shaft of the electric motor 13 having both ends together with the outdoor blower 12, and
When 3 operates, it rotates together with the outdoor blower 12. Therefore, when the electric motor 13 is operated, the air in the conditioned room sucked from the indoor side intake grill is cooled or heated by the indoor side heat exchanger 7, and further heated by the electric heater 9, and then the indoor side It is discharged from the blowing grill to the conditioned room. The suction grill and the blowing grill are formed in a synthetic resin cabinet to which the bottom plate 1 is attached.

Reference numeral 19a denotes a temperature switch (protection switch) which detects the temperature of the electric heater 9 and opens the contact piece when the temperature exceeds a predetermined protection temperature, and 19b denotes a predetermined current flowing through the electric heater. This is a current fuse that blows when the current value is exceeded.

Reference numeral 16 denotes an electrical equipment box, which accommodates a control device such as an electrical equipment substrate inside. Reference numerals 21 and 22 denote switches for sending signals to the control device, which are in order of air-conditioning operation mode (COOL mode for cooling operation, FAN mode for blowing operation to the room to be conditioned, OFF mode for stopping operation of the air conditioner). , A selection switch for switching between HEAT mode for heating operation, and a thermostat for setting the room temperature. Reference numeral 25 is a power cord for supplying electric power into the electrical equipment box. Reference numeral 26 is a frost detection switch, which closes the contact piece when the outdoor heat exchanger is frosted.

The thermostat 22 detects the temperature of the room to be conditioned and opens and closes contact pieces 22a and 22b, which will be described later, by the temperature expansion of the gas sealed inside. The thermostat is provided on the primary side of the indoor heat exchanger 7 and is attached so as to detect the temperature of the air in the conditioned room sucked by the fan 6, that is, the room temperature.

Reference numeral 28 denotes a temperature detector, which is provided at the same position as the thermostat 27. This temperature detector 2
Reference numeral 8 indicates that the set temperature is fixed, and the normally closed contact piece is opened when the room temperature rises above the set temperature (3 ° C.).

Reference numeral 29 denotes an antifreeze thermometer, which detects freezing of the indoor heat exchanger 7 and opens the normally closed contact piece. Freezing is detected when the temperature of the indoor heat exchanger 7 becomes -7 ° C or lower.

Reference numeral 30 is a connector for connecting a remote controller, and 31 is a connector for connecting a signal line of a centralized controller.

Reference numeral 32 is a fan cycle switch. By setting this switch to the FC side, the O of the compressor 2 is changed.
ON / OFF of the electric motor 13 can be interlocked with N / OFF. By setting the switch 32 to the CONT side, the electric motor 13 is continuously operated regardless of ON / OFF of the compressor 2.

Reference numeral 33 is a changeover switch. When this switch is on the a side, the operation signal (DC voltage) from the remote controller connected to the connector 30 is used to control the operation of the air conditioner, and the switch is on the b side. At this time, the operation control of the air conditioner is performed by the operation signal (DC voltage) from the selection switch 21.

Reference numeral 34 is a power switch of the air conditioner.

2 and 3 are electric circuit diagrams used in the air conditioner shown in FIG. In these figures, connector 41a and connector 41b, connector 42a and connector 4
2b, the connector 42a and the connector 42b are connected so that their terminal numbers match each other, and the electric circuit diagrams of FIGS. 2 and 3 are electrically connected.

In FIG. 2, reference numerals 44 to 54 denote diodes which limit the flow of the operation signal (DC power) to one direction.

Reference numeral 55 is an auxiliary relay, through which DC power flows and is energized through the antifreezing thermostat 29 and the normally closed contact piece 56. The normally closed contact piece 56 opens the contact piece when the auxiliary relay 57 is energized. When the normally closed contact piece 56 and the contact piece of the antifreezing thermostat 29 are opened, the energization of the auxiliary relay 55 is cut off and the auxiliary relay 55 is normally opened. The opening contact piece 58 is opened, and the power supply to the compressor 2 is cut off. Reference numeral 59 denotes an overload switch of the compressor 2. When the current flowing through the compressor 2, that is, the current flowing through the contact piece (bimetal contact piece) of the overload switch flows excessively to the compressor 2, the contact piece self-heats. Then, the circuit is cut off. Further, reference numeral 60 is an operating capacitor when a single-phase induction motor is used as a drive source of the compressor 2.

Reference numeral 61 is an auxiliary relay having a normally open contact piece 62. Therefore, when the auxiliary relay 61 is energized, the normally open contact piece 62 is closed and the four-way switching valve 4 is switched to the heating operation side.

A switching relay 63 has a switching contact piece 64. Therefore, when the switching relay 63 is energized, the switching contact piece 64 switches from B to A and the motor 13
The rotation speed of is switched from high speed to low speed. Reference numeral 65 is an operating capacitor when a single-phase induction motor is used as the electric motor 13.

Reference numeral 66 is an auxiliary relay having a normally open contact piece 67. Therefore, when the auxiliary relay 66 is energized, the normally open contact piece 67 is closed and the electric motor 13 is operated.

Reference numerals 68 and 69 are auxiliary relays, which have normally open contact pieces 70 and 71, respectively. Therefore, the auxiliary relay 6
Normally open contact pieces 70, 71
Is closed and the electric heater 9 is energized.

Reference numeral 72 is an auxiliary relay, which has a normally closed contact piece 73. Therefore, when the auxiliary relay 72 is energized, the normally-closed contact piece 73 is opened, and the connection between the third and fourth terminals of the connector 43a is opened.

Reference numeral 74 is a step-down transformer, and an AC power supply 75
The AC power from is stepped down. The lowered AC power is rectified by the full-wave rectifier circuit 76 and smoothed by the smoothing capacitor 77. The DC power after rectification and smoothing is 1 of the connector 43a.
No. 2 terminal and No. 2 terminal.

The area surrounded by the alternate long and short dash line in FIG. 2 is the portion mounted on the printed circuit board.

In FIG. 3, reference numerals 81 and 82 denote change-over switches, which change over in cooperation with the a side and the b side. When the power switch 34 is closed and the contact piece of the changeover switch 81, 82 is on the side a, the DC power supplied from the first terminal of the connector 43b is the power switch 34 and the normally closed contact piece 75.
Is supplied to the a side of the switch 82 via the connector, and DC power is further supplied to the remote controller via the connector 30. When the contact piece is on the side b, the DC power supplied from the connector No. 1 terminal is the fan cycle switch 32.
It is supplied to the selection switch 21 and the thermoswitch 27 via.

The selection switch 21 includes interlocking contact pieces 21a to 21a.
21d, each with high heating (HEAT H), weak heating (HEAT L), stop (STOP), blast (FA
N), weak cooling (COOL L), strong cooling (HEAT)
It corresponds to H). For example, the contact piece 2 of the selection switch 21
When 1a to 21d are in the STOP position, power is not supplied to any terminal of the connector 41b and all the auxiliary relays shown in FIG. 2 are in the non-energized state, so that the air conditioner is in the stopped state. ..

When the contact pieces 21a to 21d of the selection switch 21 are in the high heating (HEAT H) position, the contact piece 21b is provided.
And the contact piece 21d are connected. When the contact piece 21b is connected, the connector 41b is connected through the fifth terminal of FIG.
The auxiliary relay 61 shown in (1) is energized, the four-way switching valve 4 is switched, and the refrigeration cycle for heating operation is set. At the same time, the first stage (1st) contact piece and the second stage (2n) of the thermostat 22
2) via the auxiliary relay 55 or the auxiliary relay 5 of FIG.
7, 68, 69 are energized.

The thermostat 22 has contact pieces 22a and 22b which are switched according to the detected temperature. The contact piece 22a is on the a side.
Set the switching temperature (set temperature) on the b side to 18 ° C to 3 ° C.
It can be arbitrarily changed within the range of 2 ° C., and when the detected temperature is higher than this switching temperature, the contact piece 22a is on the b side.
In addition, the contact piece 22b has a switching temperature of the a side and the b side,
The temperature is automatically set to a temperature lower than that of the contact piece 22a by 1.5 ° C. in association with a. When the room temperature becomes lower than this temperature, the contact piece 22b becomes a side.

Therefore, during heating operation (during strong heating or weak heating), the contact piece 22a is switched from the detected temperature of the thermostat 22 and the set temperature, and when the contact piece 22a is on the a side, the thermostat 22 is further heated. Depending on whether the contact piece 22a is on the a side or the b side, the compressor 2 is operated or the electric heater 9 is energized.

When the contact piece 22b of the thermostat 22 is on the a side (the state shown in FIG. 3), the auxiliary relays 57, 68 and 69 shown in FIG. Is energized. At the same time, normally closed piece 5
6 opens to prevent energization of the auxiliary relay 55. Contact piece 2
When 2b is on the b side, the auxiliary relay 55 is energized via the first terminal of the connector 41b to operate the compressor 2.

If the armature of the antifreezing thermostat 29 is opened during the operation of the compressor 2, the operation of the compressor 2 is stopped, the indoor heat exchanger is thawed, and the armature of the frost detection switch 26 is closed. At times, the auxiliary relays 57, 68, 69 are closed and the electric heater is energized as described above.

Next, by connecting the contact piece 21d of the selection switch 21, the auxiliary relay 66 is energized during strong heating (the same applies during strong cooling), the normally open contact piece 67 is closed, and the motor 13 is turned on. Rotate at high speed. When the contact piece 21d is weakly heated (the same applies during weak cooling), the auxiliary relays 63 and 66 are energized, the normally open contact piece 67 is closed, and the normally open contact piece 64 is switched to rotate the electric motor 13 at a low speed.

In such an operation, when the fan cycle switch 32 is on the FC side, the contact piece 21d of the selection switch 21 is powered when the contact piece 22a of the thermostat 22 is on the a side (b side during cooling operation). It is supplied and controls the operation of the electric motor 13 as described above. That is, the electric motor 13 is operated only when the thermostat 22 is operated and the compressor 2 is operated or the electric heater is energized.

When the contact piece of the temperature detector 28 is closed (the detected temperature is 3 ° C or lower), the electric heater is operated as described above, and the temperature in the room to be conditioned does not fall below 3 ° C. To control it.

When the terminals of the connector 31 are short-circuited by the external controller, the auxiliary relay 72 is energized and the normally-closed contact piece 73 is opened, so that power is not supplied to the selection switch 21 and the air conditioner is operated. Will not be done.

FIG. 4 is an electric circuit diagram of a remote controller connected to the connector 30 shown in FIG. 3. For example, this remote controller is a GENERAL ELEC.
3AAT82B23A1 manufactured by TRIC. In FIG. 4, 91 is a connector, which is the connector 3 shown in FIG.
It has a structure that can be connected to 0. At this time, the connector 9
1 and the terminals of the connector 30 having the same symbols are connected to each other.

Further, this remote controller can be installed on the wall inside the room to be conditioned.

Reference numeral 92 is a selection switch, which has interlocking contact pieces 93 and 94. This selection switch is the cooling (C
DC power is supplied to the contact piece 93 via the R terminal of the connector 91 when in the OOOL position, and contact piece 94 is supplied through the R terminal of the connector 91 when the selection switch is in the heating (HEAT) position. Is supplied with DC power, and the contact piece 93 is connected to negative DC power via the C terminal of the connector 91.

Reference numeral 95 is a thermostat for switching the contact pieces 96 and 97 according to the detected temperature. The contact piece 96 is on the H side when the detected temperature is higher than the set value, and is on the L side when the detected temperature is lower than the set value. Setting temperature is 5 degrees Fahrenheit
It can be set in the range of 0F to 90F, and the differential when the contact piece 96 is switched is 2F. Similar to the contact piece 96, the contact piece 97 is such that the contact piece 97 becomes the L side when the detected temperature becomes equal to or lower than a predetermined temperature. This predetermined value is Fahrenheit 4
It is 0F.

A fan cycle switch 98 has the same purpose as the fan cycle switch shown in FIG.

Reference numerals 99 to 101 denote electric heaters for the anti-civator, which are energized during the heating operation to turn on the thermostat 9.
Heat the surroundings of 5.

In the remote controller thus constructed, for example, when the temperature detected by the thermostat 95 during the heating operation is equal to or lower than the set temperature, the DC power supplied from the R terminal of the connector 91 (the switch 34 shown in FIG. 3 is turned ON).
When the changeover switches 81 and 82 are on the side a, the contact piece 94 of the selection switch 92 and the contact piece 96 of the thermostat 95 are connected.
(Since the detected temperature is lower than the set temperature, the contact piece is on the L side), it is supplied to the Y terminal of the connector 42a shown in FIG. 2 via the Y terminal of the connector 91, and the auxiliary relay 55 is energized. At the same time, DC power is also supplied to the B terminal of the connector 42a shown in FIG. 2 via the B terminal of the connector 91, and the auxiliary relay 61 is energized. Further, DC power is also supplied to the G terminal of the connector 42a shown in FIG. 2 via the G terminal of the connector 91, and the auxiliary relay 66 is energized.

As described above, the auxiliary relays 55, 61, 66
The heating operation by the heat pump cycle is performed by energizing the.

When the temperature detected by the thermostat 95 is low and the contact piece 97 is on the L side, the DC power supplied from the R terminal of the connector 91 is supplied to the contact piece 94 of the selection switch 92.
It is supplied to the W terminal of the connector 42a shown in FIG. 2 via the contact piece 97 of the thermostat 95 and the W terminal of the connector 91, and the auxiliary relays 57, 68, 69 are energized.

Therefore, the operation of the compressor 2 is stopped and the heating operation by the electric heater 9 is performed.

The selection switch 92 in FIG. 4 is the cooling (COO
When L) is selected, the DC power supplied from the R terminal of the connector 91 is transmitted through the contact piece 93 of the selection switch 92, the thermostat 95 and the contact piece 96, and the Y terminal of the connector 91 to the connector 42a shown in FIG. Is supplied to the Y terminal of the compressor 2 and the compressor 2 is operated as in the heating operation. At this time, since the auxiliary relay 61 is not energized, the refrigerating cycle performs cooling operation.

As described above, the controller using the present invention can operate the air conditioner from the remote controller by switching the switches 81 and 82 to the side a when the remote controller is connected to the connector 30. Further, when the remote controller is not used, the switches 81 and 82 are set to the b side so that the air conditioner main body can operate the air conditioner.

[0053]

The present invention has a refrigeration cycle in which a compressor, a heat source side heat exchanger, a pressure reducing device, and a use side heat exchanger are connected by a refrigerant pipe, and is based on the temperature of the controlled chamber detected by the temperature sensing section. In an air conditioner that has an operation control unit that outputs an operation signal for a compressor or the like, a controller having an operation control unit controls energization of electric devices such as a compressor in response to an operation signal from the operation control unit. And a remote controller that outputs an operation signal of a compressor or the like separated from the air conditioner, and an operation signal from the remote controller to an electric circuit for supplying the operation signal to the relay through a diode. Since the connector and the switch that blocks the operation of the relay based on the operation signal from the operation control unit are provided, the operation of the air conditioner can be controlled by operating the switch. Those that can be controlled from any remote controller.

When installing the air conditioner in the room to be conditioned where the remote controller is already installed,
The operation of the air conditioner can be easily controlled by the remote controller simply by connecting the remote controller to the connector and operating the switch.

[Brief description of drawings]

FIG. 1 is a perspective view with a part cut away of an air conditioner showing an embodiment of the present invention.

FIG. 2 is an electric circuit diagram used for controlling the air conditioner shown in FIG.

FIG. 3 is an electric circuit diagram used for controlling the air conditioner shown in FIG.

FIG. 4 is an electric circuit diagram of a remote controller connected to the connector shown in FIG.

[Explanation of symbols]

 2 Compressor 4 Four-way switching valve 7 Indoor heat exchanger 9 Electric heater 10 Outdoor heat exchanger 13 Electric motor 21 Selection switch 22 Thermostat 30 Connector 32 Fan cycle switch 41a, 42a, 43a Connector 41b, 42b, 43b Connector 44-54 Diode 81,82 Changeover switch 91 Connector 92 Selection switch 95 Thermostat 98 Fan cycle switch

Claims (1)

[Claims] 1. A refrigeration cycle in which a compressor, a heat source side heat exchanger, a pressure reducing device, and a use side heat exchanger are connected by a refrigerant pipe, and the compressor is based on the temperature of a controlled room detected by a temperature sensing unit. In an air conditioner having an operation control unit that outputs an operation signal such as a relay, the controller having the operation control unit includes a relay that controls energization of an electric device such as a compressor in response to the operation signal from the operation control unit. And a remote controller that is separated from the air conditioner and outputs an operation signal of the compressor, and a connector that supplies an operation signal from the remote controller to an electric circuit for supplying the operation signal to the relay through a diode. A control device for an air conditioner, comprising: a switch that blocks the operation of the relay in response to a driving signal from the driving control unit.