JP3306126B2 - 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 a twin-flow type air conditioner for blowing air for air conditioning in two directions in a room.

[0002]

2. Description of the Related Art There is a twin-flow type air conditioner which copes with the tendency of a large living room to secure a good temperature distribution in the room by two-way blowing.

The air conditioner includes an indoor unit mounted on a ceiling, two indoor heat exchangers provided in the indoor unit, and two indoor fans for circulating indoor air through the indoor heat exchanger. The air for air conditioning that has passed through each indoor heat exchanger is blown out in two directions in the room.

[0004]

As a user's demand for a twin-flow type air conditioner, there is a need to locally air-condition not a whole room but a part of the room.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner that enables efficient local air conditioning.

[0005]

An air conditioner according to the present invention is buried in a ceiling surface of a room to be air-conditioned having zones formed on both sides.
Mounted in order inclusive state, has an inlet in the center of the lower surface portion, a one-way chamber zone the blow out direction on both sides of the suction opening
To the first air outlet and the indoor zone in the other direction
The second air outlet has an inner peripheral surface et provided with heat insulating material along the
The space inside the heat insulating material is divided into two in the left-right direction by a partition plate in an upright state, so that a first ventilation path is formed from the suction port to the first outlet, and the first ventilation path is formed from the suction port. An indoor unit in which a second ventilation path is formed to the second air outlet, a first indoor heat exchanger provided in the first ventilation path, and a second indoor heat exchanger provided in the second ventilation path An outdoor heat exchanger is connected to a discharge port of the compressor via a four-way valve, and the outdoor heat exchanger is connected to the first chamber via an expansion valve.
The parallel circuit of the internal heat exchanger and the second indoor heat exchanger is connected,
A refrigeration cycle whose parallel circuit is connected to the suction port of the compressor through the four-way valve and capable of cooling operation and heating operation, and is provided in the first ventilation path, and sucks room air from the suction port; A first indoor fan that blows the sucked air through the first indoor heat exchanger and blows out the room from the first outlet into the room, and is provided in the second ventilation passage, sucks room air from the suction port, and sucks the air. A second indoor fan for blowing air into the room from the second outlet through the second indoor heat exchanger, and air conditioning mainly in the indoor zone on the first outlet side
1st local control mode for performing the above and the above 2nd outlet
Means for selecting one of the second local control modes for performing air conditioning mainly in the indoor zone on the side,
When the local control mode is selected, the air volume of the first indoor fan is increased to reduce the air volume of the second indoor fan .
The refrigeration cycle is operated in a state, refrigeration cycle in a state of increasing the air volume of the second indoor fan when the second local control mode is selected to reduce the air volume of the first indoor fan
Driving the vehicle, the first local control mode and the second station
In the normal control mode where none of the control modes is selected
Is the air volume of the first indoor fan and the second indoor fan
With the air flow rates of
Means for driving the vehicle.

[0006]

[Function] Air conditioning mainly in the indoor zone on the first outlet side
If the first local control mode to perform is selected, the first
The refrigeration cycle is operated with the air volume of the indoor fan increased and the air volume of the second indoor fan reduced . On the side of the second outlet
When the second local control mode for performing air conditioning mainly composed of indoor zones is selected, the air volume of the second indoor fan increases, frozen in a state with a reduced air volume of the first indoor fan
Drive Icle. 1st local control mode and 2nd local
In the normal control mode where none of the control modes is selected
The air volume of the first indoor fan and the air volume of the second indoor fan
Operate the refrigeration cycle with the same value set .

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, reference numeral 1 denotes an air-conditioned room, and an indoor unit 10 is mounted on a ceiling surface 1a in a buried state. The indoor unit 10 has a suction port 11 at the center of a lower surface part of the same surface as the ceiling surface 1a, and a first air outlet 12a and a second air outlet 12b on both sides of the air inlet 11.
Having.

A heat insulating material 13 is provided along the inner peripheral surface of the indoor unit 10, and a space inside the heat insulating material 13 is divided into two in the left-right direction by a partition plate 14 in an upright state. Thus, in the indoor unit 10, the first ventilation path 15a is formed from the suction port 11 to the air outlet 12a, and the second ventilation path 15b is formed from the suction port 11 to the air outlet 12b. The filter 16 is mounted inside the suction port 11. The first indoor heat exchanger 17a and the ventilation path 15a
A first indoor fan 18a is provided. In ventilation passage 15b,
A second indoor heat exchanger 17b and a second indoor fan 18b are provided.

When the indoor fan 18a is turned on, the indoor air flows through the air inlet 1
The air is sucked into 5a, passes through the indoor heat exchanger 17a, becomes air-conditioning air, and is blown into the room 1 from the outlet 12a. When the indoor fan 18b is turned on, the indoor air is sucked into the ventilation path 15b through the suction port 11 and the filter 16, passes through the indoor heat exchanger 17b, becomes the air for air conditioning, and is blown into the room 1 from the outlet 12b. You. Blown air of the air outlet 12a, the first zone of the one-way in the room 1 (blow-out
(Indoor zone on the side of the mouth 12a) . Outlet 1
The blow-out wind of 2b is in the second zone (the outlet) in the other direction of the room 1.
(Indoor zone on the 12b side) Head in the direction of B. FIG. 3 shows the configuration of the refrigeration cycle and the control circuit.

The outlet of the compressor 21 is connected to an outdoor heat exchanger 23 via a four-way valve 22. This outdoor heat exchanger 23
There indoor heat exchanger 17a via the expansion valve 24, 17b moderate
Connected to column circuit . The indoor heat exchangers 17 a and 17 b are connected to a suction port of the compressor 21 via a four-way valve 22. An outdoor fan 25 is provided near the outdoor heat exchanger 23.

During the cooling operation, the refrigerant discharged from the compressor 21 flows in the direction indicated by the solid arrow in the drawing to form a cooling cycle, and the outdoor heat exchanger 23 is a condenser and the indoor heat exchangers 17a and 17b.
Works as an evaporator. During the heating operation, the refrigerant discharged from the compressor 21 flows in the direction of the dashed arrow in the drawing to form a heating cycle, and the indoor heat exchangers 17a and 17b function as condensers, and the outdoor heat exchanger 23 functions as an evaporator. Reference numeral 30 denotes a control unit comprising a microcomputer and its peripheral circuits. The control unit 30 is connected to the commercial AC power supply 3 via a step-down transformer 31.
2 is connected.

The control unit 30 includes a four-way valve 22 and an outdoor fan 2
5, inverter circuit 33, tap switching circuits 34a, 34
b, an indoor temperature sensor 35, and a remote control type operation controller (hereinafter abbreviated as a remote controller) 36 are connected.

The inverter circuit 33 rectifies the voltage of the power supply 32, converts the rectified voltage into alternating current having a frequency (and voltage) according to a command from the control unit 30, and outputs the alternating current. This output is the driving power of the motor of the compressor 21. Tap switching circuit 34
a and 34b are supplied from the power supply 32 to the indoor fan motor 18a.
The energization is switched for each of the speed taps of M and 18bM. Remote control 36 is, in addition to the function of setting the operating conditions, line a first local control mode and the air conditioning mainly composed of zone B for performing the air conditioning mainly composed of zone A as described above
The second zone selection button (selection zone setting means) for selecting one of the local control mode 37a of Utame, 3
7b. The control unit 30 includes the following functional units.

(1) The refrigerant discharged from the compressor 21 is supplied to the four-way valve 2
2, outdoor heat exchanger 23, expansion valve 24, indoor heat exchanger 17
a, 17b and means for returning to the compressor 21 through the four-way valve 22 to perform a cooling operation.

(2) The refrigerant discharged from the compressor 21 is supplied to the four-way valve 2
2. Means for returning to the compressor 21 through the indoor heat exchangers 17a and 17b, the expansion valve 24, the outdoor heat exchanger 23, and the four-way valve 22, and performing a heating operation.

(3) During operation, the detected temperature (indoor temperature) Ta of the indoor temperature sensor 35 and the set temperature Ts of the remote controller 36
Means for controlling the output frequency of the inverter circuit 33 (the operating frequency of the compressor 21) according to the difference between

(4) Zone selection button 37 of remote controller 36
In the normal control mode in which neither a nor 37b is operated, means for setting the air volumes Fa and Fb of the indoor fans 18a and 18b to the same value Fx (three levels of strong, weak and fine) according to the operation of the remote controller 36.

(5) One of the local control modes of the zones A and B is selected according to the operation of the zone selection buttons 37a and 37b, and the indoor fans 18a and 1 are selected accordingly.
Means for changing the air volume ratio of 8b.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. In the normal control mode in which none of the zone selection buttons 37a, 37b of the remote controller 36 is operated, the air flow rates Fa,
Fb is the same value Fx according to the operation of the remote controller 36
(Three levels of strong, weak, and fine).

That is, as shown in FIG.
When the air volume “strong” is set at 6, the tap switching circuit 34
a, 34b, the indoor fan motors 18aM, 18b
Electric current is supplied to the M high-speed tap “H”. As a result, the indoor fans 18a and 18b rotate at a high speed,
A large amount of air-conditioning air is blown into each of the indoor zone A and zone B.

When the air flow "weak" is set, the middle speed tap "M" is energized and the indoor fans 18a, 18
b rotates at medium speed. When the air flow “fine” is set, the low-speed tap “L” is energized, and the indoor fan 18
a, 18b rotate at a low speed. The air flow levels for the zones A and B in the normal control mode are indicated by thick arrows in FIG. 2 as vector amounts. Zone selection button 37
When any one of a and 37b is pressed, a local control mode is entered, and the air volume ratio of the indoor fans 18a and 18b is changed.

For example, when the zone selection button 37a is pressed, a local control mode for the zone A is entered, and the air volume Fa of the indoor fan 18a is set to a value F corresponding to the operation of the remote controller 36.
x is increased by α, and the air volume Fb of the remaining indoor fan 18b is reduced by β from a value Fx corresponding to the operation of the remote controller 36.

That is, when the local control mode of the zone A is entered, if the air volume "strong" is set by the remote controller 36, the tap switching circuit 34a controls the ultra-high speed tap "UH" of the indoor fan motor 18aM. Is supplied with electricity. Thereby, the rotation speed of the indoor fan 18a increases from the high speed to the very high speed, and the air volume to the zone A increases. In addition, the tap switching circuit 34b energizes the medium speed tap "M +" of the indoor fan motor 18bM, thereby reducing the rotation speed of the indoor fan 18b from a high speed to a medium (up) speed, and reducing the air volume to the zone B. Is done.

When the air volume "weak" is set by the remote controller 36, power is supplied to the medium speed tap "M +" of the indoor fan motor 18aM, and the rotation speed of the indoor fan 18a is changed from the medium speed to the medium (up) speed. And the air volume to the zone A is increased. Also, power is supplied to the medium speed tap “M−” of the indoor fan motor 18bM, and the rotation speed of the indoor fan 18b decreases from the medium speed to the medium (low) speed,
The air volume to the zone B is reduced.

When the air volume "fine" is set by the remote controller 36, power is supplied to the medium speed tap "M-" of the indoor fan motor 18aM, and the rotation speed of the indoor fan 18a is changed from low speed to medium (low). The speed is increased and the airflow to zone A is increased. In addition, power is supplied to the low-speed tap “L−” of the indoor fan motor 18bM, and the rotation speed of the indoor fan 18b decreases from the low speed to the low (low) speed,
The air volume to the zone B is reduced.

The air volume level for each zone in the zone A in the local control mode is indicated by a thick arrow in FIG. 7 as a vector amount. When the local control mode of the zone B is set, the air volume to the zone B increases and the air volume to the zone A decreases by the same control.

As described above, the local control mode can be selected by a simple operation of the remote controller 36, whereby the air volume ratio of the indoor fans 18a and 18b can be freely changed. Efficient air conditioning is possible. For example, in a large living room or the like, when a resident is located in one corner of the room, air conditioning can be performed mainly in the zone where the resident is located, so that cooling and heating start up quickly and is economical. Also, the mounting position of the indoor unit 10 is optimally at the center of the ceiling surface, but the mounting position may be restricted to a corner of the ceiling surface due to the arrangement of furniture and the like. Even in such a case, comfortable air conditioning can be performed mainly in the zone where the resident is.

Further, in the local control mode, the air volume to the non-selected zone is reduced instead of increasing the air volume to the selected zone, so that the capacity of the selected zone can be increased without increasing the capacity of the compressor 21. Therefore, for example, a problem such as giving a feeling of cool air to the resident of the selected zone at the time of heating does not occur. In addition, since the capacity of the compressor 21 does not need to be increased, an energy saving effect can be obtained.

In the above embodiment, the local control mode of the zone A or the local control mode of the zone B is selected by operating the remote controller 36. However, as shown in FIG. Temperature sensor 38
a, 38b, and by detecting the radiant heat temperature from the zones A and B, the local control mode of the zone A or the zone B
May be automatically selected. In this case, the radiant heat temperature from the wall and floor
And the radiant heat temperature from the wall surface or floor surface of the zone B is detected as the load of the zone B, and the local control mode of the zone corresponding to the larger one of the two loads is selected (zone selection). Means) . And the air volume ratio is changed according to the change of both loads with the progress of air conditioning,
When both loads become almost the same, the local control mode is released (all the local control modes are selected by the zone selecting means).
Is not selected) , the normal control mode is set. A broken line in FIG. 8 indicates a detection field of the radiant heat temperature.

Two human body sensors for detecting infrared light are provided in place of the radiant heat temperature sensors 38a and 38b, and the presence or absence of a human body in the zones A and B is detected so that the local control mode of the zone A or the local control mode of the zone B is detected. May be automatically selected. In this case, the local control mode of the zone where the person is located is selected.

In the above embodiment, the air flow rate of the indoor fan is changed by switching the speed tap. However, for example, an inverter circuit for driving the indoor fan is provided, and the output frequency of the inverter circuit is controlled to control the indoor fan. May be changed in a stepless manner.

[0033]

As described above, according to the present invention, it is possible to provide an air conditioner capable of locally efficient air conditioning.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal configuration of an indoor unit according to an embodiment of the present invention.

FIG. 2 is a view showing the relationship between the indoor unit and the indoor space of the embodiment.

FIG. 3 is a configuration diagram of a refrigeration cycle and a control circuit of the embodiment.

FIG. 4 is a flowchart for explaining the operation of the embodiment.

FIG. 5 is a view showing air volume setting conditions in a normal control mode of the embodiment.

FIG. 6 is a view showing air volume setting conditions in a local control mode of the embodiment.

FIG. 7 is a view showing the relationship between the indoor unit and the indoor space in the local control mode of the embodiment.

FIG. 8 is a configuration diagram of a main part of a modification of the embodiment.

[Explanation of symbols]

1 indoor, A zone, B zone, 10 indoor unit, 11 inlet, 12a, 12b outlet, 17a,
17b: indoor heat exchanger, 18a, 18b: indoor fan,
30: control unit, 36: remote control.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02 102

Claims (3)

(57) [Claims] 1. An air-conditioned room having zones formed on both sides.
Mounted in a state embedded in a ceiling surface has an inlet at the center of the lower surface portion, the blow out direction one direction on both sides of the suction opening
1st outlet to indoor zone and indoor zone in other direction
Has a second air outlet facing the heat
The first ventilation passage is formed from the suction port to the first air outlet by dividing the space inside the heat insulating material into two in the left-right direction by the partition plate in the upright state. An indoor unit in which a second ventilation path is formed to reach the second air outlet; a first indoor heat exchanger provided in the first ventilation path; and a second indoor heat exchanger provided in the second ventilation path An outdoor heat exchanger is connected to a discharge port of the compressor via a four-way valve, and the outdoor heat exchanger is connected to the first indoor heat via an expansion valve.
A refrigeration cycle in which a parallel circuit of an exchanger and a second indoor heat exchanger is connected, and each indoor heat exchanger is connected to the suction port of the compressor via the four-way valve and capable of cooling operation and heating operation. A first indoor fan that is provided in the first ventilation path, sucks indoor air from the suction port, passes the suctioned air through the first indoor heat exchanger, and blows the indoor air from the first air outlet into the room; A second indoor fan that is provided in a second ventilation path, sucks indoor air from the suction port, passes the suction air through the second indoor heat exchanger, and blows the indoor air from the second air outlet to the room; Perform air conditioning mainly in the indoor zone on the outlet side
First local control mode and the second air outlet side of the chamber for
Means for selecting one of a second local control mode for performing air conditioning mainly in the inner zone; and increasing the air volume of the first indoor fan when the first local control mode is selected. The refrigeration cycle is operated with the air volume of the second indoor fan reduced, and when the second local control mode is selected, the air volume of the second indoor fan is increased to reduce the air volume of the first indoor fan. Reduced status
The refrigeration cycle is operated in the state, and the first local control mode is operated.
Mode and the second local control mode are not selected.
In the normal control mode, the air volume of the first indoor fan and
Shaped set air volume of the second indoor fan to the same value to each other
And means for operating the refrigeration cycle in a state . 2. An air-conditioned room having zones formed on both sides.
Mounted in a state embedded in a ceiling surface has an inlet at the center of the lower surface portion, the blow out direction one direction on both sides of the suction opening
1st outlet to indoor zone and indoor zone in other direction
Has a second air outlet facing the heat
The first ventilation passage is formed from the suction port to the first air outlet by dividing the space inside the heat insulating material into two in the left-right direction by the partition plate in the upright state. An indoor unit in which a second ventilation path is formed to reach the second air outlet; a first indoor heat exchanger provided in the first ventilation path; and a second indoor heat exchanger provided in the second ventilation path An outdoor heat exchanger is connected to a discharge port of the compressor via a four-way valve, and the outdoor heat exchanger is connected to the first indoor heat via an expansion valve.
A refrigeration cycle in which a parallel circuit of an exchanger and a second indoor heat exchanger is connected, and each indoor heat exchanger is connected to the suction port of the compressor via the four-way valve and capable of cooling operation and heating operation. A first indoor fan that is provided in the first ventilation path, sucks indoor air from the suction port, passes the suctioned air through the first indoor heat exchanger, and blows the indoor air from the first air outlet into the room; A second indoor fan that is provided in a second ventilation path, sucks indoor air from the suction port, passes the suction air through the second indoor heat exchanger, and blows the indoor air from the second air outlet to the room; Perform air conditioning mainly in the indoor zone on the outlet side
First local control mode and the second air outlet side of the chamber for
A remote control type operation controller having a selection zone setting means for selecting one of the second local control modes for performing air conditioning mainly in the inner zone ; while reducing the air volume of the second indoor fan to increase the air volume of the first indoor fan when the first local control mode is selected in the selection zone setting means
Operate the refrigeration cycle and set the selected zone of the operation controller.
When the second local control mode is selected by the setting means , the refrigeration cycle is operated with the air flow of the second indoor fan increased and the air flow of the first indoor fan reduced ,
The first local control mode is selected by the selection zone setting means of the operation device.
Mode and the second local control mode are not selected.
In the normal control mode, the air volume of the first indoor fan and
A state in which the air volume of the second indoor fan is set to the same value as each other
And means for operating the refrigeration cycle in a state . 3. An air-conditioned room having zones formed on both sides.
Mounted in a state embedded in a ceiling surface has an inlet at the center of the lower surface portion, the blow out direction one direction on both sides of the suction opening
1st outlet to indoor zone and indoor zone in other direction
Has a second air outlet facing the heat
The first ventilation passage is formed from the suction port to the first air outlet by dividing the space inside the heat insulating material into two in the left-right direction by the partition plate in the upright state. An indoor unit in which a second ventilation path is formed to reach the second air outlet; a first indoor heat exchanger provided in the first ventilation path; and a second indoor heat exchanger provided in the second ventilation path An outdoor heat exchanger is connected to a discharge port of the compressor via a four-way valve, and the outdoor heat exchanger is connected to the first indoor heat via an expansion valve.
A refrigeration cycle in which a parallel circuit of an exchanger and a second indoor heat exchanger is connected, and each indoor heat exchanger is connected to the suction port of the compressor via the four-way valve and capable of cooling operation and heating operation. A first indoor fan that is provided in the first ventilation path, sucks indoor air from the suction port, passes the suctioned air through the first indoor heat exchanger, and blows the indoor air from the first air outlet into the room; A second indoor fan that is provided in a second ventilation path, sucks indoor air from the suction port, passes the suction air through the second indoor heat exchanger, and blows the indoor air from the second air outlet to the room; A first radiant heat temperature sensor for detecting a radiant heat temperature of the first indoor zone to which the blowout wind is supplied; and a radiant heat temperature of the second indoor zone to which the second blowout wind is supplied. a second radiant temperature sensor, wherein each chamber zone And zone selecting means for selecting whichever load of emissions is large by the detection of each radiation heat temperature sensors, by increasing the air volume of the first indoor fan when the first chamber zone in the zone selection means is selected Operating the refrigeration cycle in a state where the air volume of the second indoor fan is reduced,
When the second indoor zone is selected by the zone selecting means, the refrigeration cycle is operated in a state where the air volume of the second indoor fan is increased and the air volume of the first indoor fan is reduced ,
A first room zone and a second room by the zone selection means;
Previous in normal control mode where none of the inner zones are selected
The air volume of the first indoor fan and the wind of the second indoor fan
With the amount set to the same value,
An air conditioner, comprising: a driving unit;