JP3157447B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner comprising an air conditioner and a floor heater.

[0002]

2. Description of the Related Art Conventionally, a living room of a house (indoor).
Air conditioners are installed in various places, for example, to perform various air conditioning operations such as cooling, heating, and dehumidification (dry). In recent years, floor heating has been performed indoors in consideration of the warmth of the feet. The number of houses laying air conditioners and using them together with air conditioners is increasing.

[0003] In this case, a refrigerant is supplied from a cooling device constituting a refrigerant circuit to a refrigerant pipe of a heat exchanger (a use-side heat exchanger) of an indoor unit constituting an air conditioner to exert a cooling function. The heat exchanger is further provided with hot water piping,
Hot water is supplied to this hot water pipe from a heat source device (boiler) to exert a heating effect. Then, air in the room is circulated through the heat exchanger, and after the heat is exchanged, the air is supplied to the room to perform air conditioning.

[0004] In addition, hot water is also supplied from the heat source device to a hot water pipe of a floor heater under the feet to heat the room from the floor.

[0005]

The control of the air conditioner as described above is performed based on the indoor temperature sensed by a sensor built in the indoor unit main body or a remote controller and the set temperature of the indoor. Conventionally, since the control of the air conditioner and the operation of the floor heater are not associated with each other, the air conditioner is only independently controlled regardless of whether the floor heater is operating.

On the other hand, it is difficult for the sensor of the air conditioner to detect the heating action from the floor heater, and a difference occurs between the room temperature actually sensed by the human body and the control temperature of the air conditioner. There was a problem that caused discomfort.

[0007] The present invention has been made to solve the above-mentioned conventional technical problems, and provides an air conditioner with improved comfort when using an air conditioner and a floor heater together. It is intended for.

[0008]

An air conditioner according to the present invention includes an air conditioner for supplying air exchanged with a heat exchanger to a room, and a floor heater laid in the room. The control means of the air conditioner includes an automatic operation mode in which the operation of the air conditioner is automatically selected to a heating mode or a dry mode based on temperature data of a preset indoor temperature and an outside air temperature, and an automatic operation mode. If the room temperature approaches or reaches the set temperature while the air conditioner is operating and the floor heater is operating,
Means for executing a correction operation for lowering the set temperature by a predetermined value.

According to the present invention, the operation of the air conditioner in an automatic operation mode in which the operation of the air conditioner is automatically selected to a heating mode or a dry mode based on preset temperature data of the indoor temperature and the outside air temperature. When the room temperature approaches or reaches the set temperature during the operation and the floor heater is operating, the correction operation for lowering the set temperature by a predetermined value is performed. Even when a floor heater is used in combination, it is possible to improve the comfort of air conditioning without giving a discomfort that the human body is too hot. In addition, since the operation rate is reduced by the decrease in the set temperature of the air conditioner, noise due to the operation of the equipment is reduced, and energy can be saved. In addition, the comfort can be improved and the usability can be remarkably improved in the automatic operation in which the indoor air conditioning particularly depends on the equipment (air conditioner) side.

In the air conditioner of the second aspect of the present invention, the control means includes a display device, which displays the set temperature on the display device, and prohibits the display of the set temperature in the automatic operation mode. .

According to the second aspect of the present invention, the display of the set temperature is prohibited in the automatic operation mode, so that the user can realize that the set temperature is automatically changed by the operation of correcting the set temperature. And no unnecessary discomfort is given.

[0012]

[0013]

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of an air conditioner AC of the present invention, FIG. 2 is a partially cutaway perspective view of an indoor unit 2 of an air conditioner 1 as an embodiment to which the present invention is applied, and FIG.
FIG. 4 is a front view of a remote controller 5 of the air conditioner 1, and FIG.
FIG. 5 shows an electric circuit diagram of the outdoor unit 3 and a heat source unit (boiler) 4 of the air conditioner 1, respectively.

In FIG. 1, an air conditioner AC of the present invention is shown.
Is composed of an air conditioner 1 and a floor heater 41,
The air conditioner 1 includes a wall-mounted indoor unit 2 installed indoors, an outdoor unit 3 and a heat source unit 4 installed outdoors.

As shown in FIG. 2, a use-side heat exchanger 7 is mounted on the front surface of a steel-made frame 6 constituting the indoor unit 2, and this heat exchanger 7 is composed of a cooling heat exchanger 7A and hot water. And a heat exchanger 7B. A cross flow fan 8 is mounted on the left and right behind the heat exchanger 7, and the fan 8 is driven to rotate by a fan motor 8M mounted on the right.

As will be described later, a refrigerant pipe 11 connected to the outdoor unit 3 and through which a refrigerant flows is provided in the cooling heat exchanger 7A of the heat exchanger 7 in a meandering manner. The heater 7B is connected to the heat source device 4 via a variable flow rate valve (electrically operated valve) 10 as described later, and a hot water pipe 12 through which hot water flows is provided in a meandering manner. Also, on the right side of the front of the heat exchanger 7, the indoor temperature,
A room temperature sensor 18 and a humidity sensor 19 for detecting humidity are mounted, and a hot water heat exchanger sensor 17 for detecting the temperature of the hot water heat exchanger 7B is also mounted.

An operation panel 21 is mounted on the right side of the heat exchanger 7, and a service lamp 13 and a test run switch 14 are provided there. Further, a control board 22 and a power supply board 23 are attached to the back of the operation panel 21, and a terminal board 24 is attached below.
Further, a display 27 is provided in front of the terminal plate 24.

On the other hand, a drain pan (not shown) is provided on the left and right sides of the heat exchanger 7, and a drain hose 29 is connected to the drain pan and is drawn rearward. Reference numeral 25 denotes a power cord, and reference numeral 28 denotes a gas-out sensor.

An indoor unit cover 31 is attached to the frame 6 from the front so as to cover up these components. The heat exchanger 7 is provided at the center of the front surface of the cover 31.
A slit-shaped suction port 32 is formed in front of the suction port 32, and a filter 33 is provided between the suction port 32 and the heat exchanger 7.
And an air purification filter 34.

An outlet 36 is formed on the front surface of the cover 31 below the inlet 32 so as to extend to the left and right. A plurality of left-right adjusting blades 38 are rotatably attached to the outlet 36. Also, a louver 42 for adjusting the upper and lower blowing directions is attached to the outlet 36,
The louver 42 is driven by a louver motor 42M at the right end.

On the other hand, the outdoor unit 3 comprises a compressor 54, a heat source side heat exchanger 56 and an outdoor unit fan 57. The compressor 54 and the heat source side heat exchanger 56 are connected via an expansion valve (decompression device) 58. The refrigerant pipe 11 of the cooling heat exchanger 7A constituting the use side heat exchanger 7 of the indoor unit 2
To form a well-known refrigerant circuit. Also, 57M
Is a fan motor of the outdoor unit fan 57.

The heat source unit 4 is a boiler that generates hot water of a predetermined high temperature by gas combustion or an electric heater, and the hot water pipe 12 of the hot water heat exchanger 7B constituting the use side heat exchanger 7 has a flow rate as described above. The heat source device 4 is connected via a variable valve 10.

The floor heater 41 is laid on the floor of the room, and the hot water pipe 61 provided in a meandering shape is connected to the heat source unit 4 via a variable flow rate valve (electrically operated valve) 59. .

Next, in FIG. 4, the control board 22 of the indoor unit 2 of the air conditioner 1 is constituted by a general-purpose microcomputer constituting control means. The control board 22 is connected to a display board 46 constituting a display device provided corresponding to the display 27 and a switch board 47 provided corresponding to the operation panel 21. The variable valve 10 and the louver motor 42M are connected. Then, the display substrate 46
Is provided with a light receiving section (not shown) for receiving infrared rays from the remote controller 5. The room temperature sensor 18 and the humidity sensor 19 are connected, and the hot water heat exchanger sensor 17 and the gas lack sensor 28 are also connected. Also,
Reference numeral 48 denotes a thermal fuse for detecting overheating of the terminal plate 24, which is also connected to the control board 22.

The control board 22 is connected to a power supply board 23 via a power supply line and a serial communication line.
A terminal plate 24 is connected to 3. A power cord 25 is connected to the terminal plate 24 and the terminal plate 2
A communication line 4 is connected to a terminal plate 53 of a control board 52 of the outdoor unit 3.

The control board 52 of the outdoor unit 3 is also constituted by a general-purpose microcomputer constituting control means. The control board 52 is connected to the fan motor 57M and a compressor motor 54M for driving the compressor. Are connected via a motor driving IC 64. Further, to the control board 52 of the outdoor unit 3, an outside air temperature sensor 66 for detecting an outside air temperature and a compressor temperature sensor 67 for detecting a temperature of the compressor 54 are connected.

The control board 52 is connected to a heat source board 69 provided on the heat source unit 4 via a communication board 68. The heat source device board 69 controls the gas combustion in the heat source device 4 or the generation of hot water by the electric heater, and furthermore, the hot water piping 61 of the floor heater 41.
A variable flow rate valve 59 is also connected and controls it.

Next, the operation of the air conditioner AC will be described with reference to the configuration of the remote controller 5 of FIG. 3 and the flowchart of FIG. The remote controller 5 includes a liquid crystal display unit 71 as a display device composed of liquid crystal and a switch unit 72, which are connected to and controlled by a microcomputer (not shown) on the remote controller side. Furthermore,
The microcomputer is also connected to a room temperature sensor (body sensor) on the remote controller side (not shown), an infrared light emitting unit, and the like.

Reference numeral 73 provided on the switch section 72 is a start / stop key for the air conditioner 1.
The control board 22 of the indoor unit 2 operates / stops the devices connected thereto by instructing the ON / OFF operation of the unit 3, and instructs the outdoor unit 3 to each unit of the outdoor unit 3 and the heat source unit 4. Start and stop of.

Reference numerals 74 and 75 are room temperature setting keys, and the set temperature Ts set by the keys is digitally displayed on the right side of the liquid crystal display unit 71. Note that the room temperature Tr is digitally displayed side by side on the left side of the liquid crystal display unit 71. 80 is an adjustment key for the louver 42, and 79 is a cross flow fan 8
The key 82 is a silent operation key.

The air conditioner 1 has four modes: a cooling mode, a heating mode, a dry (amenity dry) mode, and an automatic operation (neuro automatic) mode.
This mode can be switched cyclically by pressing the cooling / heating switching key 76.
The current mode is displayed on the upper end of the liquid crystal display 71.

In the cooling mode, the control board 22
Of the microcomputer detects the set temperature Ts and the room temperature T detected by the room temperature sensor 18 or the room temperature sensor of the remote controller 5 (both can be switched by the key 86; the same applies hereinafter).
Based on r, the operation of the compressor 54 is controlled so that the room temperature Tr approaches the set temperature Ts. The high-temperature and high-pressure refrigerant discharged from the compressor 54 enters the heat-source-side heat exchanger 56, is condensed and liquefied therein, is decompressed by the expansion valve 58, and is supplied to the refrigerant pipe 11 of the use-side heat exchanger 7. The refrigerant flowing into the heat exchanger 7 evaporates there and exhibits a cooling function. Cool air that has exchanged heat with the heat exchanger 7 is blown into the room by the fan 8 to cool the room.

In the heating mode, the heat source unit 4 is operated to supply hot water to the hot water pipe 12 of the use-side heat exchanger 7 to exert a heating effect. The warm air that has exchanged heat with the heat exchanger 7 is also blown into the room by the fan 8 to heat the room. Further, the microcomputer of the control board 22 controls the amount of hot water flowing through the hot water pipe 12 by the variable flow rate valve 10 and controls the room temperature during heating so that the room temperature Tr approaches the set temperature Ts as described above.

Further, in the dry mode, the refrigerant pipe 11
The dehumidification of the room is performed by exerting both the cooling effect by the cooling water and the heating effect by the hot water pipe 12. In this case, the humidity control is performed based on the set humidity and the indoor humidity detected by the humidity sensor 19, and the set humidity is set by operating the humidity setting key 77. The set humidity is also displayed as a bar on the upper left of the liquid crystal display unit 71.

Next, the automatic operation mode will be described. In this automatic operation mode, the set temperature data preset (stored) in the microcomputer of the control board 22 and the room temperature Tr taken from the room temperature sensor 18 (or the room sensor of the remote controller 5) and the control board 52 are used. Automatic operation based on the outside air temperature taken from the outside air temperature sensor 66 is performed.

That is, for example, when the outside air temperature is lower than + 18 ° C., when the room temperature Tr is + 21.9 ° C. or lower, the set temperature Ts is set to + 22 ° C., and the above-described heating mode operation (heating operation) is performed. Further, the room temperature Tr is + 22 ° C. or more +2.
When the temperature is 5.9 ° C. or lower, the heating operation is performed with the set temperature Ts set at + 24 ° C. Further, when the room temperature Tr is equal to or higher than + 26 ° C., the set temperature Ts is set to + 26 ° C. and the set humidity is set to 60% to perform the dry mode operation (dry operation).

On the other hand, for example, when the outside air temperature is + 18 ° C. or more, and when the room temperature Tr is + 21.9 ° C. or less, the dry operation is performed with the set temperature Ts set to + 22 ° C. and the set humidity set to 60%. Further, the room temperature Tr is + 22 ° C. or higher +25.
When the temperature is 9 ° C. or less, the dry operation is performed with the set temperature Ts set to + 24 ° C. and the set humidity set to 60%. Furthermore, when the room temperature Tr is equal to or higher than + 26 ° C., the set temperature Ts is similarly set to + 26 ° C.
Dry operation is performed with the set humidity set to 60%.

As described above, in the automatic operation mode, the set temperature T
As s, a value preset in the microcomputer of the control board 22 is selected and used according to the outside air temperature and the indoor temperature Tr. Therefore, in this automatic operation mode, the microcomputer of the remote controller 5 does not display the set temperature on the liquid crystal display unit 71. Similarly, the microcomputer of the control board 22 does not display the set temperature on the display board 46.

Next, floor heating will be described. Regardless of whether or not the air conditioner 1 is operating, when the floor heating key 78 of the remote controller 5 is pressed, the microcomputer of the remote controller 5 displays the floor heating “high” on the liquid crystal display unit 71. Then, a signal is transmitted from the remote controller 5 to the control board 52 of the outdoor unit 3 from the control board 22 of the indoor unit 2, and further transferred from the control board 52 to the heat source unit board 69 via the communication board 68. The heat source unit 4 starts operating.

The heat source device board 69 is controlled by the flow rate variable valve 59
The amount of hot water flowing through the hot water pipe 61 of the floor heater 41 is adjusted to supply a relatively large amount of hot water, and the “high” (high temperature) operation of the floor heater 41 is performed. The heating effect of the floor heater 41 is switched from "high" to "medium" and further to "low" by further pressing the floor heating key 78, and finally stopped. In the "medium" and "low" operations, the heat source board 69 throttles the flow rate variable valve 59 more than in the "high" operation, and reduces the flow rate of hot water to reduce the heating effect.

When the air conditioner 1 is stopped while the air conditioner 1 and the floor heater 41 are operating at the same time, the floor heater 41 is also stopped. Then, with the next start of operation of the air conditioner 1, the floor heater 41 is also operated.

Next, the operation of correcting the set temperature Ts when the air conditioner 1 and the floor heater 41 are used together will be described with reference to FIG. FIG. 6 shows a program (schematic) of the microcomputer of the control board 22 of the indoor unit 2. First, the microcomputer determines whether or not the floor heater 41 is operated (ON) in step S1, and if not, proceeds to step S5 to control each operation mode based on the set temperature Ts as described above. Execute.

When the floor heater 41 is operating, the microcomputer proceeds from step S1 to step S2, and determines whether the air conditioner 1 is performing the heating operation in the automatic operation mode. If no at this stage, the process similarly proceeds to step S5.

Next, if the floor heater 41 is currently operating and the air conditioner 1 is heating in the automatic operation mode, the microcomputer proceeds to step S3 and the indoor temperature Tr is reduced to the set temperature Ts-. It is determined whether the temperature has risen to 1 ° C., and if not, the process proceeds to step S5. Then, when the room temperature Tr approaches the set temperature Ts (for example, 24 ° C. to be added) and rises to Ts−1 ° C. by the heating operation, the microcomputer proceeds to step S4 and lowers by 3 ° C. from the currently set temperature Ts. A correction operation for setting the temperature to a new set temperature Ts (in this case, + 21 ° C.) is performed.

Thereafter, based on the new set temperature Ts corrected in step S5, the above-described automatic operation using the outside air temperature and the indoor temperature Tr is continued.

Here, it is difficult for the room temperature sensor 18 of the indoor unit 2 or the room temperature sensor of the remote controller to catch the heating effect (heating effect) from the floor heater 41, and the microcomputer of the control board 22 is assumed to be comfortable for the human body. At the set temperature Ts set in advance, a situation occurs in which the user actually feels hot and uncomfortable.

However, in the present invention, when the floor heater 41 is in operation, the room temperature Tr is reduced to the set temperature Ts-.
When the temperature reaches 1 ° C., a correction operation of lowering the set temperature Ts by 3 ° C. is performed. Without providing, comfort of air conditioning can be improved. Also, the set temperature T of the air conditioner 1
Since the operating rate of the compressor motor 54M and the like decreases due to the decrease in s, noise can be reduced and energy can be saved.

Further, since such a correction operation is performed in the automatic operation mode, it is possible to improve the comfort and the usability of the indoor air conditioning, especially in the automatic operation depending on the air conditioner 1, in the automatic operation. It becomes possible. Also,
As described above, in the automatic operation mode, the display of the set temperature Ts is not performed, so that the user does not realize that the set temperature Ts has been automatically changed by the correction operation of the set temperature Ts, and the useless operation is unnecessary. The inconvenience of giving anxiety can be avoided beforehand.

Next, the timer operation will be described. The microcomputer of the control board 22 of the indoor unit 2 and the microcomputer of the remote controller 5 have a clock function, and the microcomputer of the control board 22 of the indoor unit 2 is turned on (operated once or twice a day). ), A program timer function capable of setting “OFF” (stop. OFF) is provided.

Further, in this program timer function, both the air conditioner (air conditioner) 1 and the floor heater 41 are simultaneously turned on / off, only the air conditioner 1 is turned on / off, or only the floor heater 41 is turned on / off. You can choose.

Next, the setting operation of the program timer function will be described. The remote controller 5 always digitally displays the current time at the lower right of the liquid crystal display unit 71. Now, with the air conditioner 1 stopped, the program switch key 81
Press once to enter the timer operation mode in which the air conditioner 1 and the floor heater 41 are simultaneously turned on and off, and an air conditioner (air conditioner) / floor heating program is displayed at the lower left of the liquid crystal display 71. In this state, when the time setting key 83 is pressed, the time setting mode is set, and the first “ON” time flashes and is displayed.
The second "on" time is set.

Next, when the time setting key 83 is pressed again, the first "off" time is displayed in a blinking manner. Similarly, the first "off" time is set by the adjustment keys 84 and 85. Further, when the time setting key 83 is pressed again, the second “ON” time blinks, and the adjustment keys 84 and 85 are similarly displayed.
Sets the second "on" time. Then, when the time setting key 83 is pressed again, the second “off” time is displayed in a blinking manner. Similarly, the second “off” time is set by the adjustment keys 84 and 85.

The microcomputer of the control board 22 of the indoor unit 2 instructs the outdoor unit 3 and the heat source unit 4 based on the setting, and turns the air conditioner 1 and the floor heater 41 on and off at the set time.

As described above, the air conditioner 1 and the floor heater 4
When the program switch key 81 is pressed again from the timer operation mode in which the air conditioner 1 is turned on and off at the same time, the mode is switched to the timer operation mode in which only the air conditioner 1 is turned on and off, and the air conditioner ( An air conditioner) program is displayed. In this state,
By pressing the time setting key 83 and the adjustment keys 84 and 85 as described above, one or two on / off times can be set, and the microcomputer of the control board 22 of the indoor unit 2 sets the outdoor unit 3 based on the setting. And turns the air conditioner 1 on and off at the set time.

When the program switch key 81 is pressed once more in the timer operation mode in which only the air conditioner 1 is turned on and off as described above, the timer operation mode in which only the floor heater 41 is turned on and off is set. Switching is performed, and a floor heating program is displayed on the lower left of the liquid crystal display unit 71. In this state, as described above, the time setting key 83
By pressing the adjustment keys 84 and 85, the on / off time can be set once or twice. The microcomputer of the control board 22 of the indoor unit 2
A command is issued to the heat source unit 4 via the outdoor unit 3 to turn the floor heater 41 on and off at a set time.

When the program switch key 81 is pressed once more in the timer operation mode in which only the floor heater 41 is turned on and off as described above, the timer operation mode is canceled.

As described above, by pressing the program switching key 81 of the remote controller 5, the air conditioner 1 and the floor heater 41 are used together, the air conditioner 1 alone (air conditioner), the floor heater 41 alone, and the cancellation are performed. The timer operation is sequentially switched as shown by the arrow in FIG.
Since the time can be set in each mode, the timer operation setting and the time setting according to the lifestyle of the user can be performed very easily.

Although the correcting operation is performed at the set temperature Ts-1 ° C. in the embodiment, the correcting operation may be performed at the set temperature Ts. However, if the correction is made when the temperature approaches the set temperature Ts as in the embodiment, the so-called overshoot of the room temperature felt by the human body is further reduced, and the comfort is further improved.

Further, each numerical value shown in the embodiment is not limited to this, and is set appropriately according to the capability of the device.

[0061]

As described above in detail, according to the present invention, an air conditioner having an air conditioner for supplying air exchanged with a heat exchanger to a room and a floor heater laid in the room. In the control means of the air conditioner, an automatic operation mode in which the operation of the air conditioner is automatically selected to a heating mode or a dry mode based on temperature data of a preset indoor temperature and an outside air temperature, If the room temperature approaches or reaches the set temperature while the air conditioner is operating in the automatic operation mode and the floor heater is operating, a correction operation for reducing the set temperature by a predetermined value is executed. Means, even when the air conditioner and the floor heater are used in combination, it is possible to improve the comfort of the air conditioning without giving the discomfort that the human body is too hot. What . In addition, since the operation rate is reduced by the decrease in the set temperature of the air conditioner, noise due to the operation of the equipment is reduced, and energy can be saved. In addition, the comfort can be improved and the usability can be remarkably improved in the automatic operation in which the indoor air conditioning particularly depends on the equipment (air conditioner) side.

According to the second aspect of the present invention, the control means includes a display device, which displays the set temperature on the display device, and inhibits the display of the set temperature in the automatic operation mode. The user does not realize that the set temperature has been automatically changed by the correction operation, and no unnecessary discomfort is given.

[0063]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an air conditioner of the present invention.

FIG. 2 is a partially cutaway perspective view of an indoor unit of an air conditioner as an embodiment to which the present invention is applied.

FIG. 3 is a front view of a remote controller of the air conditioner.

FIG. 4 is an electric circuit diagram of an indoor unit of the air conditioner.

FIG. 5 is an electric circuit diagram of an outdoor unit and a heat source unit of the air conditioner.

FIG. 6 is a flowchart showing a program of a microcomputer of a control board of an indoor unit of the air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 2 Indoor unit 3 Outdoor unit 4 Heat source unit 5 Remote control 41 Floor heater AC air conditioner

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 11/02 102 F24F 11/02

Claims (2)

(57) [Claims] And 1. A heat exchanger exchanging heat with air supplied to the room air conditioner, the air conditioning apparatus and a laid floor heating system in the chamber, the control unit of the air conditioner Based on the preset indoor and outdoor air temperature data.
This air conditioner operates in heating mode or dry mode.
An automatic operation mode automatically selected as a mode, and an operation mode of the air conditioner in the automatic operation mode.
And while the floor heater is in operation,
When the temperature approaches or reaches the set temperature,
A correction operation for lowering the set temperature by a predetermined value is executed.
Air conditioning apparatus comprising: the means. 2. The control means according to claim 1, further comprising a display device.
In addition to displaying the set temperature on this display,
In the operation mode, the display of the set temperature is prohibited.
The air conditioner according to claim 1, wherein