JPH05118580A - Air-conditioning device - Google Patents

Abstract

PURPOSE:To permit the introduction of air-conditioning air, whose amount is optimum to a load in an air-conditioning area, into respective air-conditioning areas even when the air-conditioning leads of a plurality of air-conditioning areas are different. CONSTITUTION:A unit 1 is provided with air passages 8, 9, 10, connected to a plurality of ducts 5, 6, 7 respectively, heat exchangers 11, 12, 13, arranged in the air passages respectively, and a fan 50, sending air into respective air passages. The unit is equipped with also first controllers 17, 18, 19, controlling the opening degree of refrigerant control valves 14, 15, 16 in accordance with the loads of respective air-conditioning areas, and a second controller 33, keeping the number of rotation of the fan in constant substantially during the operation of the unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for supplying temperature-controlled air to a plurality of air-conditioned areas (rooms) through ducts.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 61-22201 discloses an air conditioner for supplying temperature-controlled air to a plurality of air-conditioned areas via ducts.

In the air conditioner shown in this publication, a heat exchange chamber that communicates with each duct is formed in a case (unit) in which a plurality of ducts are connected, and heat exchange is performed in each heat exchange chamber. The heat exchangers are arranged and three-way valves are used in these heat exchangers to distribute the heat medium alternately and periodically. As a result, the stimulus of heating and cooling is intermittently given to the user.

[0004]

As described above, in the air conditioner in which the heat medium is alternately and periodically distributed to the heat exchangers by using the three-way valve, the air conditioning loads in the air-conditioned areas are different. In such a case, the air-conditioned area with a large air-conditioning load may not be sufficiently air-conditioned, while the air-conditioned area with a low air-conditioning load may be over-conditioned (too cold, too warm).

An object of the present invention is to guide, even if the air-conditioning loads of a plurality of air-conditioned areas are different, to the respective air-conditioned areas an amount of temperature-controlled air commensurate with the load.

[0006]

In order to achieve this object, the present invention provides, in a unit in which a plurality of ducts are connected to each other, ventilation passages individually connected to the respective ducts, and the ventilation passages are respectively arranged in the ventilation passages. A heat exchanger and a blower that blows air into each ventilation passage are provided, and each heat exchanger is provided with a refrigerant control valve, and each refrigerant control valve is provided in accordance with the air conditioning load of each air-conditioned area. A first controller for adjusting the opening degree of
The second that keeps the rotation speed of the blower substantially constant while the unit is operating
And a controller.

[0007]

The regulator adjusts the amount of refrigerant flowing into each heat exchanger in accordance with the air conditioning load of each air-conditioned region, and the amount of ventilation is always kept constant.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a unit in which a blower heat exchanger (all of which will be described later) and the like are housed, and this unit 1 is provided with three outlets 2 and 3.4. The outlet ducts 2, 6 and 7 are respectively provided in the outlets 2, 3 and 4 of
It is connected. Reference numerals 8, 9, and 10 are ventilation passages that are individually connected to these three blowing ducts 5, 6, and 7, and heat exchangers 11, 12, and 13 are arranged in the ventilation passages, respectively. These heat exchangers 11, 12, 13 are provided with first control valves 14, 15, 16 for causing the inlet pipes to perform a pressure reducing action, respectively, and these first control valves 14, 15,
The valve opening of 16 is controlled by the first controllers 17, 18, and 19. The method of controlling the valve opening will be described later. The heat exchangers 11, 12 and 13 are connected in parallel via a refrigerant pipe. 50 is a blower, and three fans 51, 52, and 53 are coaxially connected to one drive motor 54. These three fans 51, 52, 53
It is arranged so as to correspond to the respective ventilation passages 8, 9 and 10.

An outdoor unit 20 is an inverter compressor 21,
The outdoor heat exchanger 22, the outdoor blower 23, etc. are accommodated. The operating frequency of the inverter compressor 21 is determined by the third controller 24. This third controller 24
Is connected to the first controller 17, 18, 19 in the unit 1 and the first controller 17, 1 in this unit 1
The signals from 8 and 19 are input.

The above-mentioned blow-out ducts 5, 6 and 7 are connected to the air-conditioned areas (rooms) 25, 26 and 27, respectively, and the temperature-controlled air discharged from these blow-out ducts 5, 6 and 7 respectively. The air-conditioned areas 25, 26, 27 are air-conditioned.

Reference numerals 28, 29 and 30 denote air-conditioned areas 25,
26, 27, and these temperature sensors 28, 29, 30 are respectively the controller 1 of the unit 1.
It is connected to 7, 18, and 19. Here, since the air conditioning loads in the respective air-conditioned areas 25, 26, 27 are different from each other, the heat exchangers 13, 12, 11 and the fans 53, 52, 51 corresponding thereto are built in the unit 1. .. That is, the magnitude of the air conditioning load in each air-conditioned area is 2
Since 7>26> 25, the capacity of the heat exchanger is set to 11>12> 13, and the size of the fan is set to 51>52> 53.

Reference numeral 31 is a return duct for returning air from the respective air-conditioned areas 25, 26, 27 to the unit 1, and 3
Reference numeral 2 is an auxiliary duct for guiding outdoor air into the unit 1.

In the air conditioner thus constructed, during cooling, the refrigerant discharged from the compressor 21 flows as shown by the solid line by the operation of the compressor 21, and the heat exchangers 11, 12, 13 acts as an evaporator. In addition, by operating the blower 50, the respective ventilation paths 8,
The air cooled (temperature controlled) in the air conditioning chambers 9 and 10 passes through the respective discharge ducts 5, 6 and 7 to the respective air-conditioned regions 27, 26 and 2 respectively.
The air in the air-conditioned areas 27, 26, 25 is discharged to the unit 5 and returned to the unit 1 via the return duct 31. Here, for example, in the air-conditioned region 25, the indoor temperature of the air-conditioned region 25 decreases due to the discharge of the cooling air. The temperature sensor 28 detects this decrease (change). And when the difference between the set temperature and the room temperature, that is, the air conditioning load decreases,
The valve opening of the refrigerant control valve 16 is reduced via the controller 19. As a result, the amount of liquid refrigerant flowing into the heat exchanger 13 decreases, the temperature of the heat exchanger 13 rises, and the temperature of the temperature-controlled air guided to the discharge duct 7 also rises accordingly. During such control, the blower 50 moves to the second
Since the controller 33 always operates at a constant rotation speed, a predetermined amount of air flowing into the air-conditioned region 28 from the discharge duct 7 is ensured. In other words,
When the air-conditioning load of the air-conditioned area 28 decreases, the temperature of the temperature-adjusted air discharged from the discharge duct 7 rises accordingly, but the discharge amount thereof maintains a predetermined amount. This ensures that the air in the air-conditioned region 28 does not stagnate and circulates reliably. still,
If the temperature-controlled air is increased and the discharge air amount is decreased at the same time as the air conditioning load is reduced, the air in the air-conditioned area may be stagnated and the air-conditioning or air cleaning in the air-conditioned area may not be performed reliably.

The refrigerant amount control by the refrigerant control valve 16 as described above is also performed individually in the other refrigerant control valves 14 and 15, and the temperature of the temperature-controlled air discharged from the respective ducts 5 and 6 is different. It is controlled by the air conditioning load of the air-conditioned areas 30, 29. The operating frequency of the above-mentioned inverter compressor 21 is determined by the total value of the air conditioning loads in the air-conditioned areas 28, 29, 30 and its output is output from the third controller 24.

In the above embodiment, the description was made only during cooling, but a four-way valve may be provided in the discharge pipe and the suction pipe of the inverter compressor 21 to provide an air conditioner capable of heating operation.

[0016]

As described above, the present invention is an air conditioner in which temperature-controlled air is introduced into an air-conditioned area by a duct, even if the load of the air-conditioned area changes. Since only the temperature of this temperature-controlled air is changed while keeping the amount of temperature-controlled air introduced to the specified value at the specified value, it is necessary to reliably maintain the specified amount of ventilation in this area to be air-conditioned according to the load. You can

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an air conditioner of the present invention.

[Explanation of symbols]

 1 unit 5,6,7 duct 8,9,10 air passage 11,12,13 heat exchanger 14,15,16 refrigerant control valve 17,18,19 first controller 25,26,27 air-conditioned area 33 Second controller 50 Blower

Claims (1)

[Claims] 1. A unit for forming temperature-controlled air,
Each of the units is provided with a duct that guides the temperature-controlled air to a plurality of air-conditioned areas, and in the unit, ventilation paths that are individually connected to the respective ducts and heats respectively stored in these ventilation paths are provided. In an air conditioner provided with an exchanger and a blower that blows air into each of the ventilation passages, a refrigerant control valve is provided in each of the heat exchangers, depending on the air conditioning load of each air-conditioned region. Air comprising a first controller that adjusts the opening degree of each of the refrigerant control valves and a second controller that keeps the rotation speed of the blower substantially constant while the unit is operating. Harmony device.