JP2000055386A - Hot water heating air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water air conditioner in which water in the circulation circuit can be prevented from freezing during stoppage of air conditioning operation while saving power consumption. SOLUTION: An indoor unit 1 is provided with an outdoor temperature sensor (outdoor temperature detecting means) 8, and means 10 for feeding power from the indoor unit 1 to an outdoor unit 2 only when the temperature detected by the outdoor temperature sensor 8 is lower than a specified level during stoppage of air conditioning operation. An antifreeze operation signal is delivered from the indoor unit 1 to the outdoor unit 2 on a communication line (communication means) 33. The outdoor unit 2 is provided with means 27 for operating a circulation pump 20 when power is fed from the indoor unit 1 to an outdoor unit 2 and the antifreeze operation signal is delivered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating type air conditioner for warming a room by radiating heat of hot water generated by heating in an outdoor unit in an indoor unit.

[0002]

2. Description of the Related Art Conventionally, warm water provided with an indoor unit separately provided indoors and outdoors, an outdoor unit supplied with operating power from the indoor unit, and a circulation circuit for circulating water between the two units. Heated air conditioners are known. According to this hot water heating type air conditioner, the water in the circulation circuit is heated by the heating means in the outdoor unit to be heated water, and the hot water is circulated to the circulation circuit by the circulation pump. An air-conditioning operation in which heat is radiated into the room is performed.

In such a hot water heating type air conditioner, when the air conditioning operation is stopped, the operation of the circulation pump is stopped, so that the water in the circulation circuit becomes stagnant. Water in the circuit may freeze.

Therefore, even when the air-conditioning operation is stopped, the operating power is constantly supplied from the indoor unit to the outdoor unit, and an outdoor temperature sensor for detecting the outdoor air temperature by the power supplied to the outdoor unit is provided. There is known a hot water heating type air conditioner in which a freezing prevention operation is performed by operating a heating means or a circulation pump in accordance with a temperature detected by the outdoor air temperature sensor. According to this hot water heating type air conditioner, when the outdoor air temperature becomes equal to or lower than a predetermined temperature at which there is a possibility of freezing when the air conditioning operation is stopped, an antifreeze operation in which a heating means is operated in addition to the circulation pump or the circulation pump is performed. This can prevent the water in the circulation circuit from freezing. However, even when the air-conditioning operation is stopped, it is not preferable to supply operating power from the indoor unit to the outdoor unit in terms of saving power consumption.

[0005]

SUMMARY OF THE INVENTION In view of the foregoing, the present invention provides a hot water heating type air conditioner which can prevent water in a circulation circuit from freezing while the air conditioning operation is stopped while saving power consumption. The purpose is to provide.

[0006]

According to a first aspect of the present invention, there is provided a hot water heating type air conditioner comprising: an indoor unit; an outdoor unit to which operating power is supplied from the indoor unit; A circulation circuit in which water is circulated between the units, wherein the outdoor unit heats water in the circulation circuit to make hot water and circulates the hot water to the circulation circuit by a circulation pump, and A hot-water heating type air conditioner that performs an air-conditioning operation for radiating heat of hot water in a circulation circuit, wherein an outdoor air temperature detecting means for detecting an outdoor air temperature, and a temperature detected by the outdoor air temperature detecting means while the air-conditioning operation is stopped is a predetermined temperature. Power supply instructing means for supplying electric power from the indoor unit to the outdoor unit at the following times, and when the detected temperature of the outdoor air temperature detecting means is lower than the predetermined temperature while the air conditioning operation is stopped, A communication unit for communicating an antifreeze operation signal from the indoor unit to the outdoor unit is provided in the indoor unit, and power is supplied from the indoor unit to the outdoor unit, and when the antifreeze operation signal is communicated. An antifreezing operation means for operating the circulation pump is provided in the outdoor unit.

According to such a hot water heating type air conditioner, power is supplied from the indoor unit to the outdoor unit by the power supply instructing means only when the temperature detected by the outdoor air temperature detecting means is equal to or lower than the predetermined temperature during the halt of the air conditioning operation. At this time, the freezing prevention operation signal is communicated from the indoor unit to the outdoor unit by the communication means. When electric power is supplied from the indoor unit to the outdoor unit and the antifreezing operation signal is communicated, the circulating pump is operated by the antifreezing operation means. Therefore,
It is possible to prevent water in the circulation circuit from freezing while the air-conditioning operation is stopped, while saving power consumption as compared with the case where power is constantly supplied from the indoor unit to the outdoor unit.

[0008] In the hot water heating type air conditioner of the first aspect,
It is preferable that the outdoor air temperature detecting means is led out and provided in the vicinity of the outdoor side of a communication hole which is provided through a wall separating the indoor and outdoor and through which the circulation circuit is inserted.

In this case, since the outdoor temperature detecting means is provided at the outside of the room, the outdoor temperature can be accurately detected by eliminating the influence of the indoor temperature. Further, by using the communication hole, the outdoor air temperature detecting means can be easily led out of the indoor unit to the outside without providing a new hole in the wall. Furthermore, by providing the outdoor air temperature detecting means near the communication hole, the length of the connection line with the indoor unit can be minimized, and the outdoor air temperature detecting means can be easily installed without the connection line becoming entangled. can do.

According to a second aspect of the present invention, there is provided a hot water heating type air conditioner for solving the above-mentioned problems, wherein an indoor unit, an outdoor unit to which operating power is supplied from the indoor unit, and water circulating between the two units. The outdoor unit heats water in the circulation circuit in the outdoor unit to generate hot water, and circulates the hot water in the circulation circuit by a circulation pump. A hot-water heating type air conditioner that performs an air-conditioning operation to radiate heat, comprising: an indoor air temperature detecting means for detecting an indoor air temperature; and A power supply instructing unit for supplying electric power from the indoor unit to the outdoor unit is provided in the indoor unit, and an outdoor air temperature detecting unit for detecting an outdoor air temperature is provided. Power is supplied to the outdoor unit, and characterized in that the detected temperature of the outdoor air temperature detection means is provided antifreezing operation means for operating the circulation pump when: the second predetermined temperature to the outdoor unit.

According to such a hot water heating type air conditioner, power is supplied from the indoor unit to the outdoor unit only when the detected temperature of the indoor air temperature detecting means is equal to or lower than the first predetermined temperature while the air conditioning operation is stopped. Then, when electric power is supplied from the indoor unit to the outdoor unit and the temperature detected by the outdoor air temperature detecting means is equal to or lower than the second predetermined temperature, the circulating pump is operated by the antifreezing operation means. Therefore, it is possible to prevent water in the circulation circuit from freezing while the air-conditioning operation is stopped, while saving power consumption as compared with the case where power is constantly supplied from the indoor unit to the outdoor unit. Further, there is no need to dispose the indoor temperature detecting means of the indoor unit outside the room.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hot water heating type air conditioner of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory configuration diagram of the hot water heating type air conditioner of the first embodiment, and FIG.
FIG. 3 is an explanatory diagram of the installation of the hot water heating air conditioner of the first embodiment, and FIG. 3 is an explanatory configuration diagram of the hot water heating air conditioner of the second embodiment.

The hot water heating type air conditioner of the first embodiment includes:
As shown in FIG. 1, an indoor unit 1 and an outdoor unit 2
And a circulation circuit 3 through which water is circulated between the indoor unit 1 and the outdoor unit 2. Indoor unit 1
The indoor heat exchanger 4 connected to the circulation circuit 3, the indoor fan 5 for radiating heat of the hot water in the circulation circuit 3 through the indoor heat exchanger 4, and the indoor A first control means 7 for controlling the fan 5 and the like is provided. An outdoor air temperature sensor (outdoor air temperature detecting means) 8 for detecting an outdoor air temperature is connected to the first control means 7 and provided outside the room. The first control means 7 is provided with a power supply control means 9 for controlling power supply from the indoor unit 1 to the outdoor unit 2. The power supply control means 9 is provided with a power supply instruction means 10 for controlling power supply from the indoor unit 1 to the outdoor unit 2 in accordance with the temperature detected by the outdoor air temperature sensor 8 while the air conditioning operation is stopped.

The indoor unit 1 is supplied with electric power from an input terminal 12 by inserting a plug 11 into an outlet (not shown), and the electric power is also supplied from the output terminal 13 to the outside of the indoor unit 1. The input terminal 12 and the output terminal 13 are turned off and on by a power supply control means 9 opening and closing a relay switch 14 interposed therebetween.
Power from the input terminal 12 is supplied to the first control means 7 through the transformer 15 and the rectifying bridge circuit 16 in this order. The power supply to the indoor fan 5 is controlled by opening and closing the relay switch 17 by the first control means 7.

The outdoor unit 2 includes an outdoor heat exchanger 18 connected to the circulation circuit 3, a burner 19 for heating the outdoor heat exchanger 18, and a circulation pump 2 for circulating water in the circulation circuit 3.
0 and a second control means 21 for controlling the combustion of the burner 19, the operation of the circulation pump 20, and the like. Also,
A gas supply path 22 that supplies gas to the burner 19, an ignition plug 23 that ignites the gas supplied from the gas supply path 22 to the burner 19, and a combustion fan 24 that sends combustion air to the burner 19 are provided. . The second gas supply path 22
Gas solenoid valve 25 opened / closed by control means 21
And a gas proportional valve 26 whose opening is also adjusted by the second control means 21. The second control means 21 is provided with an anti-freezing operation means 27 for operating the burner 19 and the circulation pump 20 to perform the anti-freezing operation as described later.

The electric power output from the output terminal 14 of the indoor unit 1 is supplied to the outdoor unit 2 from the outdoor input terminal 28. The power from the outdoor input terminal 28 is
And the second control means 21 through the rectifying bridge circuit 30 in order.
Supplied to When the relay switches 31 and 32 are opened and closed by the second control means 21, the outdoor input terminal 28 is opened.
, The power supply to the circulation pump 20 and the combustion fan 24 is controlled.

The first control means 7 and the second control means 21 are connected by a communication line (communication means) 33, and a heating amount control signal and a freezing prevention operation signal to be described later are transmitted from the first control means 7 to the communication line 33. Is transmitted to the second control means 21 via the.

The operation of the hot water heating type air conditioner having the above configuration will be described. When the user operates the remote controller 6 to start the air-conditioning operation, the relay switch 14 is closed by the power supply control means 9 in response thereto, and electric power is supplied from the indoor unit 1 to the outdoor unit 2. At this time, the gas solenoid valve 25 is controlled by the second control means 21 in the outdoor unit 2.
Is opened, the opening of the gas proportional valve 26 is adjusted, the ignition plug 23 is operated, and the relay switches 31 and 32 are closed. As a result, gas is supplied from the gas supply path 22, and the ignition plug 23 ignites the gas and the combustion fan 24
As a result, combustion air is sent to burn the burner 19. Then, the water in the circulation circuit 3 is heated through the outdoor heat exchanger 18 to become hot water, and the hot water is supplied to the circulation pump 2.
0 circulates through the circulation circuit 3. At this time, the relay switch 17 is controlled by the first control means 7 in the indoor unit 1.
Is closed, the indoor fan 5 operates, and the heat of the hot water in the circulation circuit 3 is radiated to the room through the indoor heat exchanger 4.

When the user operates the remote controller 6 to adjust the room temperature during the air conditioning operation, a heating amount control signal is transmitted from the first control means 7 to the second control means 21 via the communication line 33. The second control means 2 responds to the heating amount control signal.
1 adjusts the opening of the gas proportional valve 26 to control the heating amount of water in the circulation circuit 3 by the burner 19. Thereby, the temperature of the hot water in the circulation circuit 3 is adjusted, the amount of heat released from the indoor heat exchanger 4 to the room by the indoor fan 5 is adjusted, and further, the room temperature is adjusted.

When the user operates the remote controller 6 to stop the air-conditioning operation, the relay switch 14 is opened by the power supply control means 9 in response thereto, and the power supply from the indoor unit 1 to the outdoor unit 2 is stopped. Then, the indoor fan 5 is stopped in the indoor unit 1 and the operation of the burner 19 and the circulation pump 20 in the outdoor unit 2 is stopped. When the air-conditioning operation is stopped, power is supplied to the indoor unit 1 unless the plug 11 is removed from the outlet,
The outdoor air temperature sensor 8 constantly detects the outdoor air temperature. When the temperature detected by the outdoor air temperature sensor 8 is higher than the predetermined temperature, the relay switch 14 remains open, and power is not supplied from the indoor unit 1 to the outdoor unit 2.
On the other hand, when the temperature detected by the outdoor air temperature sensor 8 is equal to or lower than the predetermined temperature, the relay switch 14 is closed by the power supply instruction means 10, and electric power is supplied from the indoor unit 1 to the outdoor unit 2. In addition, the first control means 7 sends the communication line 3
An anti-freezing operation signal is transmitted to the second control means 21 via the control signal 3. Then, the circulation pump 20 is operated by the anti-freezing operation means 27, and the burner 19 is burned as required. Note that the predetermined temperature is set to a temperature at which water in the circulation circuit 3 may freeze when the outdoor air temperature falls below that.

Thereafter, when the temperature detected by the outdoor temperature sensor 8 becomes higher than a predetermined temperature, the transmission of the antifreeze operation signal from the first control means 7 to the second control means 21 is stopped. Then, the combustion of the burner 19 and the operation of the circulation pump 20 are stopped by the anti-freezing operation means 27. Further, the power supply instructing means 10 opens the relay switch 14 to stop the power supply from the indoor unit 1 to the outdoor unit 2. Thereafter, while the air-conditioning operation is stopped, the above operation is repeated depending on two cases, that is, the temperature detected by the outdoor air temperature sensor 8 is higher than the predetermined temperature or lower than the predetermined temperature.

As described above, the electric power is supplied from the indoor unit 1 to the outdoor unit 2 only when the temperature detected by the outdoor air temperature sensor 8 is equal to or lower than the predetermined temperature while the air conditioning operation is stopped. Also,
At this time, an antifreeze operation signal is transmitted from the first control means 7 to the second control means 21, the circulating pump 20 is operated by the antifreeze operation means 27, and the burner 19 is burned as required. Therefore, from the indoor unit 1 to the outdoor unit 2
As a result, it is possible to prevent water in the circulation circuit 3 from freezing while the air-conditioning operation is stopped, while saving power consumption as compared with the case where power is constantly supplied to the air conditioner.

In the first embodiment, as shown in FIG. 2, the indoor unit 1 is installed with its rear surface in contact with a wall 34 separating the indoor and outdoor. A communication hole 35 is provided in the wall 34, and a tube 36 that collectively covers the circulation circuit 3, the communication line 33, and the like is inserted through the through hole 35. Further, the outdoor temperature sensor 8 is connected to the first unit of the indoor unit 1 through the connection line 37.
It is connected to the control means 7 and provided near the outdoor side of the communication hole 35.

As shown in FIG. 2, since the outdoor air temperature sensor 8 is provided near the outdoor side of the communication hole 35, the outdoor air temperature can be accurately detected without the influence of the indoor temperature. Further, by using the communication hole 35, the outdoor temperature sensor 8 can be easily led out of the indoor unit 1 to the outside without providing a new hole in the wall 34. Further, by providing the outdoor temperature sensor 8 near the communication hole 35, the length of the connection line 37 can be minimized. Therefore, the outside air temperature sensor 8 can be easily installed without the connection wire 37 being entangled.

The hot water heating type air conditioner of the second embodiment includes:
As shown in FIG. 3, an indoor air temperature sensor (indoor air temperature detecting means) 38 for detecting an indoor air temperature is provided so as to be connected to the first control means 7. An outdoor air temperature sensor (outdoor air temperature detecting means) 39 for detecting an outdoor air temperature is connected and provided outside the room. The indoor temperature sensor 38 may be provided inside or outside the indoor unit 1 as long as it is indoors. The outdoor temperature sensor 8 of the indoor unit 1 is omitted,
The above-mentioned indoor temperature sensor 38 and outdoor temperature sensor 39 are newly added.
The configuration other than that provided with is the same as that of the first embodiment, so that the same reference numerals are assigned and the description is omitted. Further, the operation during the air-conditioning operation is the same as that of the first embodiment, and the description is omitted.

When the air-conditioning operation is stopped, power is supplied to the indoor unit 1 unless the plug 11 is disconnected from the outlet, and the indoor air temperature sensor 38 constantly detects the indoor air temperature. When the detected temperature of the indoor air temperature sensor 38 is higher than the first predetermined temperature, the relay switch 14 remains open, and power is not supplied from the indoor unit 1 to the outdoor unit 2. On the other hand, the temperature detected by the room temperature sensor 38 is the first temperature.
When the temperature is equal to or lower than the predetermined temperature, the relay switch 14 is closed by the power supply instructing means 10 and electric power is supplied from the indoor unit 1 to the outdoor unit 2. When power is supplied to the outdoor unit 2, the outdoor air temperature sensor 39 detects an outdoor air temperature. When the detected air temperature is higher than a second predetermined temperature, the burner 19 and the circulation pump 20 are not operated, and the temperature is lower than the second predetermined temperature. At times, the circulation pump 20 is operated by the anti-freezing operation means 27, and the burner 19 is burned in addition to the circulation pump 20 as necessary. Note that the second predetermined temperature is set to a temperature at which water in the circulation circuit 3 may freeze when the outdoor air temperature falls below that, and the first predetermined temperature becomes the second predetermined temperature when the indoor air temperature falls below that. The temperature is set to be expected to be:

Thereafter, when the temperature detected by the outdoor temperature sensor 39 becomes higher than the second predetermined temperature, the combustion of the burner 19 and the operation of the circulation pump 20 are stopped by the antifreezing operation means 27. When the detected temperature of the indoor air temperature sensor 38 becomes higher than the first predetermined temperature, the relay switch 14 is opened by the power supply instructing means 10 and the power supply from the indoor unit 1 to the outdoor unit 2 is stopped. Thereafter, while the air-conditioning operation is stopped, the indoor air temperature sensor 38 and the outdoor air temperature sensor 3
The above operation is repeated according to the detected temperature of No. 9.

As described above, the electric power is supplied from the indoor unit 1 to the outdoor unit 2 only when the detected temperature of the indoor air temperature sensor 38 is equal to or lower than the first predetermined temperature while the air conditioning operation is stopped.
Electric power is supplied from the indoor unit 1 to the outdoor unit 2,
In addition, when the temperature detected by the second outdoor temperature sensor 34 is equal to or lower than the second predetermined temperature, the circulation pump 19 is operated by the antifreezing operation means 27. Accordingly, it is possible to prevent the water in the circulation circuit 3 from freezing during the stoppage of the air-conditioning operation while saving the power consumption as compared with the case where power is constantly supplied from the indoor unit 1 to the outdoor unit 2. it can. Further, there is no hassle in disposing the indoor temperature sensor 38 of the indoor unit 1 outside the room.

In the second embodiment, the outdoor air temperature sensor 39 is configured to detect the outdoor air temperature when electric power is supplied to the outdoor unit 2. However, as another embodiment,
The outdoor air temperature sensor 39 may be configured to constantly detect the outdoor air temperature using an independent dry battery or the like provided in the outdoor unit 2 as a power supply.

[Brief description of the drawings]

FIG. 1 is an explanatory configuration diagram of a hot water heating type air conditioner of a first embodiment.

FIG. 2 is an explanatory diagram of installation of a hot water heating type air conditioner of the first embodiment.

FIG. 3 is an explanatory configuration diagram of a hot water heating type air conditioner of a second embodiment.

[Explanation of symbols]

1 ‥ indoor unit, 2 ‥ outdoor unit, 3 ‥ circulation circuit,
8 outdoor temperature sensor (outdoor temperature detecting means), 10 power supply instructing means, 20 circulation pump, 27 antifreeze operation means, 33 communication line (communication means), 34 wall, 35 communication hole, 38 mm Room temperature sensor (room temperature detection means), 39
‥ Outdoor temperature sensor (outdoor temperature detection means)

Claims (3)

[Claims] An indoor unit, an outdoor unit to which electric power for operation is supplied from the indoor unit, and a circulation circuit for circulating water between the two units, wherein water in the circulation circuit in the outdoor unit is provided. A hot-water heating type air conditioner that performs an air-conditioning operation of heating the hot water, circulating the hot water through the circulation circuit by a circulation pump, and radiating heat of the hot water in the circulation circuit in the indoor unit. Outdoor air temperature detecting means for detecting power supply instructing means for supplying power from the indoor unit to the outdoor unit when the detected temperature of the outdoor air temperature detecting means is equal to or lower than a predetermined temperature while the air conditioning operation is stopped; and Communication means for communicating an antifreeze operation signal from the indoor unit to the outdoor unit when the detected temperature of the outdoor air temperature detecting means is equal to or lower than the predetermined temperature. The outdoor unit is provided with an antifreeze operating means for supplying power to the outdoor unit from the indoor unit and operating the circulation pump when the antifreeze operation signal is communicated. Hot water heating type air conditioner. 2. The outdoor air temperature detecting means is provided in the vicinity of an outdoor side of a communication hole, which is provided to penetrate a wall separating the indoor and outdoor, and through which the circulation circuit is inserted.
The hot water heating type air conditioner as described. 3. An indoor unit, an outdoor unit to which operating power is supplied from the indoor unit, and a circulating circuit for circulating water between the two units, wherein the water in the circulating circuit is supplied to the outdoor unit. A hot water heating type air conditioner that performs an air conditioning operation of heating the hot water and circulating the hot water through the circulation circuit by a circulation pump, and radiating heat of the hot water in the circulation circuit in the indoor unit. And an electric power supply instructing unit for supplying electric power from the indoor unit to the outdoor unit when the detected temperature of the indoor air temperature detection unit is equal to or lower than a first predetermined temperature while the air-conditioning operation is stopped. An outdoor air temperature detecting means for detecting an outdoor air temperature; and an electric power is supplied from the indoor unit to the outdoor unit, and the outdoor air temperature detecting means detects the outdoor air temperature. Degrees hot water heating and air conditioning device, characterized in that a freeze prevention operation means for operating the circulation pump when: the second predetermined temperature to the outdoor unit.