JP6975522B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner used in a general household.

Conventionally, there has been one that improves economy and comfort by supplying control data between a plurality of heaters by bidirectional communication and performing operation according to the characteristics of each heater. (See, for example, Patent Document 1)
In addition, the fan heater is equipped with a combined operation mode, and when the air conditioner and fan heater are used together in the same room, the fan heater is used only at the start of operation when the amount of heat is insufficient, and after the set temperature of the fan heater is reached, it is used. By automatically stopping the fan heater, the comfort was improved by utilizing the characteristics of each heater without using two-way communication. (See, for example, Patent Document 2)

Japanese Unexamined Patent Publication No. 2004-257656 Japanese Patent No. 6259785

However, the device for performing two-way communication used in the heater of Patent Document 1 is expensive and is not suitable for use in a general household. In addition, most heaters that are moved and used, such as fan heaters, do not have a communication function.
Further, the fan heater shown in Patent Document 2 is stopped after the room temperature rises to the set temperature of the fan heater, and only the air conditioner continues to operate. If you want to use the heater as the main heating and the air conditioner as the secondary heating especially when it is cold or when you want to circulate the air in the room to warm the whole room, depending on the economy and the preference of the user, the air conditioner It was very annoying because the noise generated by the air conditioner and the noise generated by the heater overlapped.

In order to solve the above problems, the present invention has a suction port on the upper surface of the indoor unit and an air outlet on the bottom surface or the front surface, and has a heat exchanger, a blower fan, a room temperature sensor, and a control unit in the indoor unit. With the setting of the combined operation mode considering the combined use of the heater, the setting of the automatic operation mode that automatically sets the rotation speed of the blower fan and the output of the outdoor unit, and the operation unit that sets the room temperature and starts the operation. The control unit has a remote control unit having a display unit for displaying the setting state, and the control unit has a blower fan rotation speed setting unit that changes the rotation speed of the blower fan according to the temperature difference between the current room temperature T and the set room temperature T0. And an outdoor setting unit that sends a signal to the outdoor unit, and a memory device that reads and stores the value of the room temperature sensor, and when the combined operation mode is selected in the operation unit, the memory device Comparing the stored room temperature T1 before the first predetermined time t1 with the current room temperature T, when the current room temperature T is higher than (room temperature T1 + predetermined temperature difference A), the blower fan set in the automatic operation mode. A combined operation unit for operating the blower fan at a predetermined rotation speed X1 lower than the rotation speed X is provided.

In the air conditioner according to the present invention, when the heater is operating in the room where the air conditioner is installed, noise can be reduced by reducing the rotation speed of the blower fan.
By determining whether or not the heater is operating based on the room temperature detected by the air conditioner, the noise can be easily reduced without the need for a two-way communication device.

The conceptual diagram of one Embodiment of this invention. Control configuration diagram of the air conditioner. The flowchart which explains the combined operation. The number of revolutions of the blower fan during the automatic heating operation.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram for explaining an outline of an air conditioner 1 and a heater 2. Reference numeral 3 is an indoor unit of the air conditioner 1, which is installed horizontally on the wall surface near the ceiling in the room. The indoor unit 3 has a suction port 4 for sucking indoor air on the upper surface and an outlet 5 for blowing out temperature-controlled air from the bottom surface to the front surface.

A heat exchanger 6 having an inverted V-shaped cross section is provided below the suction port 4 in the indoor unit 3, and a cross-flow type blower fan 7 having a horizontally long columnar shape is provided below the heat exchanger 6. There is. The suction port 4 and the heat exchanger 6, the blower fan 7, and the outlet 5 are communicated with each other to form a blower path, and the operation of the blower fan 7 heats the indoor air sucked from the suction port 4 by the heat exchanger 6. Then, warm air is blown from the air outlet 5 to the lower part of the room to raise the room temperature and circulate the air in the room. A room temperature sensor 8 is provided in the air passage on the downstream side of the suction port 4 to detect the temperature of the sucked air. The outlet 4 has a vertical wind direction plate 9 that adjusts the vertical direction of the blown air and closes the outlet 4 when the operation is stopped. Reference numeral 10 is a control unit provided in the indoor unit 3 to control the operation of the air conditioner 1.

Reference numeral 11 is an outdoor unit of the air conditioner 1, which is connected to the indoor unit 3 by a connecting pipe 12 through which the refrigerant circulates and a connecting electric wire 13 for transmitting a signal from the control unit 10. The outdoor unit 11 has a compressor (not shown) and an outdoor heat exchanger (not shown) connected to the heat exchanger 6 by a refrigerant pipe, and operates a so-called heat pump cycle from the outdoor air. The heat exchanger 6 is heated by the absorbed heat to heat the room.

The heater 2 is an oil stove, an oil fan heater, a gas fan heater, or the like, and is generally used at home. The fan heater 2 (hereinafter referred to as a fan heater) has a combustion burner 14 and a blower 15 inside, and directly heats the room by burning oil or gas fuel with the combustion burner 14. Since the fan heater 2 is inexpensive, has a low fuel cost, and can be used by moving to a room or place where heating is required, it is often selected as the heating mainly used, and has a relationship with the air conditioner 1. , Can be used properly according to the user's preference.

FIG. 2 is a control configuration diagram of the air conditioner 1. Reference numeral 16 denotes a remote controller that is connected to the control unit 10 by wire or wirelessly, and has an operation unit 17 that performs various operation operations of the air conditioner 1 and a display unit 18 that displays the setting state of the air conditioner 1. The operation unit 17 has an operation switch 19 that starts the operation of the air conditioner 1 by pressing, a combined operation switch 20 that selects a combined operation mode considering the combined use of another heater 2, and a room temperature of the user's preference. A temperature setting switch 21 for setting the timer, and an operation mode switch 22 for selecting an operation mode such as heating operation, cooling operation, dehumidifying operation, and automatic operation for automatically setting the output of the outdoor unit 11 and the blower fan 7 according to the room temperature. It has a timer switch 23 for selecting a good morning timer or a good night timer. The display unit 18 allows the user to visually confirm whether the operation modes such as the set room temperature, heating, and cooling are selected by the liquid crystal panel, and the combined operation mode is selected by the combined operation switch 20.

Reference numeral 24 denotes a receiving device of the remote controller 16, which receives an operation signal transmitted from the remote controller 16 and settings of various operating conditions and transmits them to the control unit 10. Reference numeral 25 denotes an indoor blower motor that rotates the blower fan 7, and the rotation speed is varied in multiple stages in the range of about 700 to 1,600 rpm by a DC motor. Reference numeral 26 is a motor sensor that detects the rotation speed of the indoor blower motor 25.

The control unit 10 includes a blower fan rotation speed setting unit 27 that changes the rotation speed of the blower fan 7 according to the temperature difference between the current room temperature T detected by the room temperature sensor 8 and the set room temperature T0 set by the remote controller 16. It also includes an outdoor setting unit 28 that sets the output of the outdoor unit 11 and a memory device 29 that periodically reads and stores the value of the room temperature sensor 8. Further, when the combined operation mode of the heater 2 is selected by the combined operation switch 20, the control unit 10 compares the room temperature T1 before the first predetermined time t1 (1 hour) with the current room temperature T. When the room temperature T is higher than the room temperature T0 one hour ago by a predetermined temperature difference A (0.5 deg), it is determined that the fan heater 2 has already started operation, and the noise of the blower fan 7 is reduced. The combined operation unit 30 for operating the blower fan 7 at a predetermined rotation speed X1 (200 rpm) lower than the blower fan rotation speed X set in the automatic operation mode is provided.

The combined operation unit 30 compares the room temperature T2 before the second predetermined time t2 (10 minutes) shorter than the first predetermined time t1 (1 hour) stored in the memory device 29 with the current room temperature T, and is currently present. When the room temperature T is lower than the room temperature T2 10 minutes ago by a predetermined temperature difference A (0.5 deg), the rotation speed of the blower fan 7 is increased, and the predetermined rotation speed is lower than the blower fan rotation speed X set in the automatic operation mode. By operating at a low rotation speed of several X2 (50 rpm), the heating capacity is slightly increased and the room temperature is raised to improve comfort.

Further, when the current room temperature T further decreases and the predetermined temperature difference B (1.0 deg) is lower than the room temperature T2 10 minutes ago, the combined operation unit 30 further increases the rotation speed of the blower fan 7 and automatically operates. By changing to the blower fan rotation speed X set in the mode, the room temperature rise is prioritized, and the room temperature is raised by the fan heater 2 and the air conditioner 1 to improve the comfort in the room.

A receiving device 24, a room temperature sensor 8, a motor sensor 26, and the like are connected to the input side of the control unit 10. A blower motor 25, an outdoor control unit (not shown) of the outdoor unit 11 and the like are connected to the output side of the control unit 10.

FIG. 4 is a table showing the blower fan rotation speed X during automatic heating operation. In this embodiment, the rotation speed of the blower fan 7 is set to three stages of strong, medium, and weak (3.2.1), and the current room temperature T. Is 2.0 deg or more lower than the set room temperature T0, in order to raise the room temperature T quickly, the blower fan 7 is operated at 1,600 rpm in full operation, the room temperature T rises, and 2.0 to 2.0 to the set room temperature T0. During 1.0 deg, the blower fan 7 operates at a medium 1,100 rpm, and when the temperature rises to 0.5 deg above the set room temperature T0, the blower fan 7 can operate at a weak 700 rpm with almost no noise.

In the flowchart of FIG. 3, a heating combined operation of the air conditioner 1 when the fan heater 2 is operated by the main heating and the air conditioner 1 is used as the auxiliary heating will be described.
If the operation of the air conditioner 1 is started by the remote controller 16 (s1), it is determined in s2 whether the combined operation mode is selected. In the combined operation mode, whether or not the user uses the fan heater 2 in the room as the main heating is set in advance according to the user's preference. In the case of No in which the combined operation mode is not performed, the process proceeds to s9 and the normal automatic heating operation is performed. In the case of Yes that implements the combined operation mode in s2, the process proceeds to s3.

In s3, it is determined whether or not the fan heater 2 is already operating in the room. If the current room temperature T does not rise by 0.5 deg from the room temperature T1 one hour ago, the fan heater 2 has run out of fuel or is being used in another room, and the heating operation has not been performed. It is necessary to perform full operation with only 1 and proceed to s9 with No to carry out normal automatic heating operation. If the current room temperature T is 0.5 deg higher than the room temperature T1, the fan heater 2 is already operating indoors, so proceed to s4 with Yes, and the air conditioner 1 does not need to be fully operated, so that the air is blown. By lowering the rotation speed of the fan 7 by 200 rpm lower than the rotation speed X of the normal automatic operation, the noise of the wind noise generated from the indoor unit 3 is reduced, and the process proceeds to s5.

In s5, it is determined whether the room temperature T is lower than the room temperature T2 10 minutes ago. If the room temperature T is not on a downward trend, return to s4 with No and continue operation. When the room temperature T is 0.5 deg lower than the room temperature T2, Yes advances to s6, and in order to prevent the room temperature T from further lowering, the rotation speed of the blower fan 7 is increased (rotation speed X-50 rpm). ), The heating output of the air conditioner 1 is improved, and the process proceeds to s7.

In s7, it is determined whether the room temperature T is higher than the room temperature T2 10 minutes ago. When the room temperature T rises and is higher than T2, Yes returns to s4 to lower the rotation speed of the blower fan 7 to lower the output of the air conditioner 1 and reduce the noise. If the room temperature T does not rise, No to proceed to s8.

In s8, it is determined whether the room temperature T is further lowered. When the room temperature T becomes lower than the room temperature T2 10 minutes ago and becomes lower than 1.0 deg, it may be stopped due to the fan heater 2 running out of fuel, etc., or it may be used for heating another room for the convenience of the user. It is determined that the fan heater 2 has been moved and the heating by the fan heater 2 has been stopped, and the process proceeds to s9 with Yes, returns to the normal automatic heating operation, and shifts to the independent heating of the air conditioner 1. When there is no further decrease in the room temperature T, No is returned to s6 and the heating operation is continued.

As described above, in the present invention, when the fan heater (heater) 2 is operating in the room where the air conditioner 1 is installed, the rotation speed of the blower fan 7 is higher than the rotation speed X of the normal automatic heating operation mode. Noise can be reduced by lowering the noise.
Further, by determining whether or not the fan heater (heater) 2 is operating by the room temperature T detected by the air conditioner 1 by the air conditioner 1 alone, noise can be easily reduced without the need for a two-way communication device. can.
Further, when the fan heater (heater) 2 is stopped due to running out of fuel or the like, the air conditioner 1 independently determines due to the decrease in the room temperature T and shifts to the automatic heating operation mode of the air conditioner 1 to bring the room temperature to room temperature. It is possible to prevent a sudden decrease.

The present invention is not limited to the above embodiment, and the values of the predetermined temperature difference A and the predetermined temperature difference B and the ventilation are determined according to the characteristics such as the size of the indoor unit 3 and the output of the air conditioner 1. The rotation speed of the fan 7 can be appropriately changed and set, and can be modified without changing the gist of the invention.

1 Air conditioner 2 Heater (fan heater)
3 Indoor unit 7 Blower fan 8 Room temperature sensor 10 Control unit 11 Outdoor unit 16 Remote control 27 Blower fan rotation speed setting unit 29 Memory device 30 Combined operation unit

Claims (3)

A suction port is formed on the upper surface of the indoor unit, and an outlet is formed on the bottom surface or the front surface.
The indoor unit has a heat exchanger, a blower fan, a room temperature sensor, and a control unit.
The operation unit that sets the combined operation mode considering the combined use of other heaters, sets the automatic operation mode that automatically sets the rotation speed of the blower fan and the output of the outdoor unit, and sets the room temperature and starts the operation. And has a remote controller with a display unit that displays the setting status,
The control unit includes a blower fan rotation speed setting unit that changes the rotation speed of the blower fan according to the temperature difference between the current room temperature T and the set room temperature T0, an outdoor setting unit that sends a signal to the outdoor unit, and the room temperature sensor. Equipped with a memory device that reads and stores the value of
When the combined operation mode is selected in the operation unit, the room temperature T1 before the first predetermined time t1 stored in the memory device is compared with the current room temperature T, and the current room temperature T is (room temperature). When the temperature is higher than T1 + predetermined temperature difference A), the air is provided with a combined operation unit that operates the blower fan at a predetermined rotation speed X1 lower than the blower fan rotation speed X set in the automatic operation mode. Harmony machine. The combined operation unit compares the room temperature T2 before the second predetermined time t2, which is shorter than the first predetermined time t1 stored in the memory device, with the current room temperature T, and the current room temperature T is (room temperature T2-). When the temperature difference is lower than A), the rotation speed of the blower fan is increased, and the operation is performed at a predetermined rotation speed X2 lower than the rotation speed X of the blower fan set in the automatic operation mode. Item 1. The air conditioner according to Item 1. When the current room temperature T is further lowered (room temperature T2-predetermined temperature difference B), the combined operation unit sets the rotation speed of the blower fan to the blower fan rotation set in the automatic operation mode. The air conditioner according to claim 2, wherein the air conditioner is changed to the number X.

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