JP3030140B2 - 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 for supplying conditioned air to a plurality of air-conditioned areas (rooms) through ducts.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. Sho 61-22201 discloses an air conditioner which supplies temperature-controlled air to a plurality of air-conditioned areas through ducts.

[0003] In the air conditioner disclosed in this publication, heat exchange chambers that are individually connected to each duct are formed in a case (unit) to which a plurality of ducts are connected, and each of the heat exchange chambers has a heat exchange chamber. The heat exchangers are arranged so that the heat medium is alternately and periodically distributed to these heat exchangers using a three-way valve. In this way, the user is intermittently stimulated with cooling and heating.

[0004]

As described above, in an air conditioner in which a heat medium is alternately and periodically distributed to each heat exchanger using a three-way valve, the air-conditioning load of the air-conditioned area is different. In such a case, there is a problem that the air-conditioning is not sufficiently performed in the air-conditioned area where the air-conditioning load is large, whereas the air-conditioning is too air-conditioned (too cold or too warm) in the air-conditioned area where the air conditioning load is small.

SUMMARY OF THE INVENTION It is an object of the present invention to introduce a controlled amount of temperature-adjusted air to each of the air-conditioned areas even when the air-conditioning loads of the plurality of air-conditioned areas are different.

[0006]

To achieve this object, the present invention provides a unit for forming conditioned air,
A duct connected to each of the units and guiding the temperature-controlled air to a plurality of air-conditioned areas; a ventilation passage individually connected to each of the ducts in the unit; and a heat exchange housed in each of the ventilation passages And an air conditioner provided with respective blowers individually arranged corresponding to the respective ventilation passages, wherein each of the heat exchangers is provided with a refrigerant control valve, and a respective air-conditioned area is provided. A first controller for adjusting the degree of opening of each of the refrigerant control valves according to the air conditioning load, and a second controller for keeping the rotation speed of each of the blowers substantially constant during operation of the unit. Although the amount of refrigerant flowing into each heat exchanger is adjusted in response to a change in the air conditioning load in the air-conditioned area, the amount of air discharged to each air-conditioned area is kept constant.

[0007]

In the air conditioner thus configured,
When the fluctuation of the air-conditioning load in the air-conditioned area fluctuates, the amount of refrigerant flowing into each heat exchanger is adjusted accordingly, but the amount of air discharged to each air-conditioned area is kept constant.

[0008]

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

Reference numeral 20 denotes an outdoor unit, which is an inverter compressor 21,
An outdoor heat exchanger 22, an outdoor blower 23 and the like are housed. 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
Signals from 8 and 19 are input.

The outlet ducts 5, 6, and 7 are connected to air-conditioned areas (rooms) 25, 26, and 27, respectively, and the temperature-controlled air discharged from the outlet ducts 5, 6, and 7 respectively controls the outlets. The air-conditioned areas 25, 26, and 27 are air-conditioned.

Reference numerals 28, 29 and 30 denote these air-conditioned areas 25 and
The temperature sensors provided for the controller 1 of the unit 1 are temperature sensors provided for the controller 1 of the unit 1, respectively.
7, 18, and 19 are connected. Here, since the air-conditioning loads in the respective air-conditioned areas 25, 26, and 27 are different from each other, the heat exchangers 13, 12, 11 and the fans 53, 52, and 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 accordingly.

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

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

The control of the refrigerant amount 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 conditioned air discharged from the respective ducts 5 and 6 is controlled by the respective refrigerants. It is controlled by the air-conditioning load of the air-conditioned areas 30, 29. The operating frequency of the above-described inverter compressor 21 is determined by the total value of the air-conditioning loads of the air-conditioned areas 28, 29, and 30, and its output is output from the third controller 24.

In the above embodiment, only the cooling operation has been described. However, 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, in the air conditioner according to the present invention in which the temperature-controlled air is introduced into the air-conditioned area by the duct, even if the load in the air-conditioned area changes, the air-conditioned area does not change. Since only the temperature of the conditioned air is changed while maintaining the amount of the conditioned air introduced into the air at a predetermined value, the air in the conditioned area can be reliably circulated without the convection of the air in the conditioned area. It is possible to reliably maintain a predetermined amount of ventilation in the air-conditioning area and perform air-conditioning appropriate for the load.

[Brief description of the 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 Ventilation path 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

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 3/044 F24F 11/02 102

Claims (1)

(57) [Claims] 1. A unit for forming temperature-controlled air, and a duct connected to the unit and guiding the temperature-controlled air to a plurality of air-conditioned areas, wherein the unit is individually connected to the respective ducts. Connected ventilation paths, heat exchangers respectively housed in these ventilation paths, and corresponding to the respective ventilation paths.
In the air conditioner having the respective blowers individually arranged, the respective heat exchangers are provided with respective refrigerant control valves, and the respective refrigerant control is performed in accordance with the air conditioning load of the respective air-conditioned areas. a first controller for adjusting the opening of the valve, during operation of the unit and a second controller to maintain the rotational speed of the respective blowers substantially constant, the variation of the air-conditioning load of the air conditioning zone
The amount of refrigerant flowing into each heat exchanger is adjusted accordingly.
An air conditioner characterized in that the air volume discharged to each of the air-conditioned areas is kept constant .