JPS61165532A - Air conditioning device - Google Patents

Abstract

PURPOSE:To finely control the supply air blow-off temperature in conformity with the indoor thermal load by connecting an indoor unit formed by disposing therein a plurality of outdoor heat exchangers each of which has an outdoor heat exchanger and a compressor, to each other. CONSTITUTION:A first outdoor unit 1a, a second outdoor unit 1b, a third outdoor unit 1c an d a fourth outdoor unit 1d have reapectively the same construction as the conventional outdoor unit. An indoor unit 2 also has the same construction as the conventional indoor unit. First through fourth indoor heat exchangers 14a-14d are disposed from the upstream side along the air supply direction between a main filter 13 and an air supply fan 15, and the first indoor heat exchanger 14a is connected to the first outdoor unit 1a, the rest being connected similarly. Accordingly, in accordance with the thermal load, a part of the first - fourth outdoor heat exchangers 1a-1d and first - fourth indoor heat exchanger 14a-14d is stopped and a part thereof is operated to constantly maintain a high energy consumption efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a heat pump type air conditioner comprising an indoor unit having an indoor heat exchanger and an outdoor unit having an outdoor heat exchanger.

BACKGROUND ART Conventionally, as this type of air conditioner, one shown in FIG. 15 is known. This air conditioner consists of an outdoor unit 1 and an indoor unit 2. The outdoor unit 1 is a so-called air-cooled heat pump type condensing unit, and a compressor 3. Western dialect 4. Expansion valve (or capillary tube) 5. Check valve6. Outdoor heat exchanger7. Equipped with 7 and 8 outdoor units.

On the other hand, the indoor unit 2 has an air supply passage 11 that conditions outside air (OA) and leads it into the room as supply air (S^), and discharges return air (R^) from the room as exhaust air (E^). The exhaust passage 12 is arranged in parallel. On the downstream side of the main filter 13 provided in the middle of the air supply passage 11, an indoor heat exchanger 14 and an air supply 7-amp 15 are sequentially installed to provide heat to the clean air filtered by the main filter 13. The air is exchanged and supplied as conditioned air into the room through a supply air 7 amp 15. Main filter 13 above
In the air supply passage 11 and exhaust passage 12 on the upstream side,
A total heat exchanger 21 is provided spanning the middle of both of these passages. An outside air bypass damper 22 is provided between the end of the total heat exchanger 21 and the side wall of the air supply passage, and an outside air damper 23 for the total heat exchanger is provided in the air supply passage on the upstream side of the total heat exchanger 21. An outside air treatment filter 24 is provided upstream of the outside air damper 23 for the total heat exchanger. On the other hand, an exhaust bypass damper 32 is provided between the end of the total heat exchanger 21 on the exhaust passage 12 side and the side wall of the exhaust passage 12. Further, a ventilation treatment filter 34 is provided on the upstream side of the total heat exchanger on the exhaust passage side, and an exhaust damper 33 for the total heat exchanger is provided on the downstream side. Toward the total heat exchanger 21 and exhaust bypass damper 32 of the exhaust passage 12,
A return air vent 35 provided on the upstream side of the exhaust passage 12 pumps return air (RA).

A return air damper 37 is provided between the exhaust passage 12 and the air supply passage 11 between the partition wall 36 fixed to the outlet of the return air 7-an 35 of the exhaust passage 12 and the return air processing filter 34, and the exhaust passage A part of the return air (RA) of 12 is guided to the air supply passage 11.

The outdoor unit 1 and the indoor heat exchanger 14 of the indoor unit 2 are connected through a passage 43 and a passage 44 having an expansion valve (or capillary tube) 41 and a check valve 42 .

In this way, in the conventional air conditioner, the outdoor unit 1 and the indoor unit 2 are separated, and a part of the exhaust heat or wandering cold heat is recovered by the total heat exchanger 21 in the indoor unit 2 during summer and winter. to reduce energy loss,
Further, a part of the return air (RA) is guided directly to the air supply passage 11 through the return air damper 37 to reduce energy loss.

In addition, in the intermediate period, the operation of the total heat exchanger 21 is stopped, the residual heat exchanger dampers 23 and 33 are fully closed, and the outside air bypass damper 22, exhaust bypass damper 32, and return air damper 37 are linked to optimize the amount of outside air. will be introduced. In addition, in FIG. 3, solid line arrows indicate the direction in which the medium flows in the cooling cycle, and broken line arrows indicate the direction in which the medium flows in the heating cycle.

<Problems to be Solved by the Invention> However, in the conventional air conditioner described above, only one indoor heat exchanger 14 is provided in the air supply passage 11 of the indoor unit 2. If air at a set temperature, for example 35°C, is supplied to the indoor heat exchanger 14, a high energy consumption efficiency (EER) can be maintained, but if air at a low temperature below the set temperature is supplied. The outdoor unit 1 and the indoor heat exchanger 14 become partially loaded, and the energy consumption efficiency (EER) becomes low. In other words, as shown by the solid line in Figure 2, when the supplied air temperature is 35°C, the energy consumption efficiency (
EER) is 3.5, but as the supplied air temperature decreases, the energy consumption efficiency decreases. In this way, in conventional air conditioners, the temperature of the air supplied to the indoor heat exchanger 14 determined by the outside air (0^) and return air (RA) is not necessarily the set temperature, so energy consumption is reduced. The drawback is that efficiency cannot always be kept high. In addition, because conventional air conditioners are equipped with only one outdoor unit 1 and one indoor heat exchanger 14, it is difficult to increase or decrease the cooling and heating capacity to meet demand. The drawback is that many models must be prepared to match the temperature, and in order to control the indoor temperature, on-off (ON-OFF>control) must be performed, making it comfortable and energy efficient. Another disadvantage is that high temperature control cannot be performed.

SUMMARY OF THE INVENTION Therefore, the object of this invention is to maintain high energy consumption efficiency even under partial load, to be easily expandable, and to have the flexibility to adapt to various heat loads. An object of the present invention is to provide an air conditioner that can finely control the blowing temperature of supplied air according to the heat load.

Means for Solving the Problems> In order to achieve the above object, the air conditioner of the present invention has the following features:
The system includes an indoor unit in which a plurality of indoor heat exchangers are arranged along the air supply direction in an air supply passage, and a plurality of outdoor units each having an outdoor heat exchanger and a compressor. It is characterized in that it is connected to each indoor heat exchanger of the indoor unit.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

In Fig. 1, la is the first outdoor unit, 1b is Pt
52 outdoor unit, lc is the third outdoor unit, and ld is the fourth outdoor unit, each of which has the same configuration as the conventional outdoor unit 1 shown in FIG. Equipped with exchanger etc.

In addition, 2 is an indoor unit, 11 is an air supply passage, 12 is an exhaust passage, 13 is a main filter, 15 is an air supply 7 am, 2
1 is a total heat exchanger, 22 is an outside air bypass damper, 23 is an outside air damper for the total heat exchanger, 24 is an outside air treatment filter, 32 is an exhaust bypass damper, 33 is an exhaust damper for the total heat exchanger, and 34 is a return air treatment A filter, 35 is a return air 7 amp, and 36 is a partition wall, which have the same structure as the conventional example shown in FIG.

Between the main filter 13 of the air supply passage 11 and the air supply 7 ann 15, a first filter is provided from the upstream side along the air supply direction.
Indoor heat exchanger 14a, @2 indoor heat exchanger 14b,
Third indoor heat exchanger 14c, fourth indoor heat exchanger 14d
are arranged. The first indoor heat exchanger 14a and the first
The outdoor unit) la is connected through the passage 43, 44, and the second indoor heat exchanger 14b and the second outdoor unit 1b are connected through the passage 43.
．． 44, and the third indoor heat exchanger 14c and the third (outdoor UNISO) lc are connected through passages 43 and 44, fjS4
The indoor heat exchanger 14d and the tpI4 outdoor unit) ld are connected through 1184:(, 44.
゜3rd. fpJ4 indoor heat exchanger 14a, 14b,
14c and 14d have built-in check valves and expansion valves, although not shown.

On the other hand, for example, during the cooling cycle, the first outdoor unit) 1a
and ptS1 indoor heat exchanger 14a, the temperature of the air flowing into the first indoor heat exchanger 14a is 35°C.
The energy consumption efficiency is set to 3.5 in the case of . In addition, the set of the second outdoor unit) lb and the fjs2 indoor heat exchanger 14b is the second indoor heat exchanger 14.
The energy consumption efficiency is set to be 3.5 when the temperature of the air flowing into b is 30°C. In addition, the tIS3 outdoor unit) lc and the third indoor heat exchanger 14
The energy consumption efficiency of the pair with e is 3.5 when the air flowing into the third indoor heat exchanger 14c is 25°C.
It is set so that ptS4 outdoor 22)Id
and the fourth indoor heat exchanger 14d are set so that the energy consumption efficiency is 3.5 when the air temperature flowing into the fourth indoor heat exchanger 14cl is 20°C. There is.

In the air conditioner having the above configuration, assume that the air passing through the main filter 13 of the air supply passage 11 of the indoor unit 2 is currently 35°C. At this time, the first, second . Third.
The fourth outdoor units LA, LB, LC, and LD are all operated to perform the first indoor heat exchanger 14a, the second indoor heat exchanger 14b, the third indoor heat exchanger 14c, and the fourth indoor heat exchanger. The device 14d is operated. Then, 1.2,
3.4 Outdoor units la, lb, and law ld will all operate at full load, and the first indoor heat exchanger 1
4a, the supply air decreases from 35°C to 30°C, passes through the second indoor heat exchanger 14b, the supply air decreases from 30°C to 25°C, and passes through the third indoor heat exchanger 14c. Air supply is 25
°C or lowered to 420 °C, heat exchanged on the 4th indoor side! 514d
The supply air drops from 20°C to 15°C. and,
As shown in FIG. 2, the energy consumption efficiency (EER) at this time is 3.5, which is high energy efficiency, because all the sets operate at full load. And when the supply air passing through the main filter 13 is between 35°C and 30°C, @1°2.3.4 Outdoor units la, lb, l
Since aw ld is a partial load operation, the energy consumption efficiency is slightly lowered as shown in FIG.

Next, when the temperature of the supply air passing through the main filter 13 is 30° C., the operation of the outdoor unit 1a and the first indoor heat exchanger 14 is stopped.

Then, the second outdoor unit Nb and the second indoor heat exchanger 14
Group b, 3rd outdoor unit) lc and 3rd indoor heat exchanger +
4c, the fourth outdoor unit) ld, and the fourth indoor heat exchanger 14d are all operated at full load. Therefore, the energy consumption efficiency becomes 3.5 again as shown in FIG. 2, which is high. When the temperature of the air flowing through the main filter 13 is between 30°C and 25°C, the energy consumption efficiency (
EER) decreases.

However, the energy consumption efficiency is higher than that of the conventional example.6th, the temperature of the supply air passing through the main filter 13 is 25%.
℃, the outdoor Uniso Ha and the first indoor heat exchanger 14
The operation of All a and the set of the second outdoor unit 11) and the second indoor heat exchanger 14b is stopped. And p
lS3 outdoor unit 22 He and the slope of the third indoor heat exchanger 14c, and the fourth outdoor unit ID and the fourth indoor heat exchanger 14
Both sets of cl are operated at full load. At this time, as shown in Figure 2, the energy consumption efficiency (EER) is again 3.5.
It becomes higher. When the air flowing through the main filter is between 25°C and 20°C, the energy consumption efficiency decreases from the line where the energy consumption efficiency is 3.5 parallel to the solid line showing the conventional example. . However, the energy consumption efficiency is much higher than before (J'Jh). Also, if the air flowing through the main filter 13 is 20°C, the fourth outdoor unit 1d and the fourth indoor heat exchanger 14d Only the set is operated at full load, and the other sets are stopped.At this time, the energy consumption efficiency is 3.5.In contrast, in the conventional example, the energy consumption efficiency (EER) is 3.5, as shown in Figure 2. ) is 2.5 or less, which is extremely low.

In this way, this air conditioner has the first
．． 2, 3.4 outdoor unit la, lb, lc, l
d and 1st, 2nd, 3rd, 4th indoor jllll heat exchanger L
4a, 14b, 14c.

14cl can be partially stopped and partially activated depending on the load, allowing high energy consumption efficiency to be maintained at all times. In addition, depending on the required indoor temperature, that is, depending on the load, the blowing temperature itself is adjusted by the 1.2, 3.4 indoor heat exchanger 14a,
By partially stopping +4b, 14a, and 14cl, it is also possible to finely control the blowout temperature without changing the blowout air volume.

The above embodiment applies the present invention to a constant air volume system, and the above explanation is based on the case where the indoor heat load is maximum (supply air temperature 15°C).
) describes the relationship between operating conditions and energy consumption efficiency when the outside air processing heat load fluctuates, and corresponds to the large indoor heat load in Fig. 3. A constant air flow system is a system that maintains the room temperature by changing the supply air temperature while keeping the air flow constant in response to indoor heat load fluctuations. The required air volume under load is designed, and the designed air volume is always supplied, and the supply air temperature, for example in the case of cooling, is changed within a predetermined temperature range in response to indoor heat load fluctuations.

The above explanation is for a case where the indoor load is large, but the indoor heat exchangers 14a and 14b are used when the indoor heat load is medium or small.
, 14c, 14d and 1f, 21st, 31st, and 4th outdoor units) The operating conditions of la, lb, lc, and Id are shown in Figure 3.

In this way, this air conditioner has the optimal (high efficiency) indoor heat exchangers 14a, 14 to handle the heat load according to the fluctuations in the indoor heat load and the outdoor air processing heat load.
b, 14c, 14d and outdoor unit la, □1b*
Since the combination of lc and lcl can be operated, energy consumption efficiency can be maintained at a high level at all times.

Furthermore, this air conditioner can be applied to a variable air volume system, that is, a system that maintains the room temperature by keeping the supply air temperature constant and changing the supply air volume in response to indoor heat load fluctuations. In the case of this variable air volume system, if the supply air temperature is constant, for example 15 degrees Celsius in the case of cooling, the indoor heat exchange is performed according to the large or small indoor heat load (supply air volume) and the outdoor air processing heat load. vessels 14a, 14b, 14c, 14d and the first. Second. @3. 4th room outside 22) 1ae 1b, l
The operating state of the combination of ct and ld is shown in FIG. In this case, energy consumption efficiency can still be maintained at a high level. In addition, when applied to a variable air volume system,
Among multiple sets consisting of an indoor heat exchanger and an outdoor unit,
At least one set is composed of units capable of capacity control operation.

Furthermore, this air conditioner can flexibly meet capacity requirements by changing the number of indoor heat exchangers and the number of outdoor units. In particular, in this way, the indoor heat exchanger 14
By arranging any number of a, 14b, 14c, and 14d along the supply air supply direction and connecting the corresponding number of outdoor units, it is possible to easily increase or decrease the capacity. I can do it. In particular, by modularizing the outdoor unit and the indoor heat exchanger, air conditioners with various capacities can be easily constructed, which is standardized and extremely convenient for mass production.

In the above embodiment, the total heat exchanger 21 and the return air damper 3
7 to recover the heat or cold of the exhaust gas, energy efficiency can be increased, but these are not necessarily necessary and may be removed.

<Effects of the Invention> As is clear from the above, the air conditioner of the present invention has the following effects:
A plurality of indoor heat exchangers are arranged in the air supply passage of the indoor unit along the air supply direction, and the plurality of indoor heat exchangers and the plurality of outdoor units are connected one-to-one, respectively. As a result, the indoor heat exchanger and outdoor unit can be stopped or operated as required, making it possible to constantly increase energy consumption efficiency and reduce energy loss. Capacity can be controlled, and devices with various capacities can be easily configured by changing the number of indoor heat exchangers and outdoor units, easy to expand, easy to standardize after various capacities, and suitable for mass production. It has the advantage α of being convenient to use.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of an embodiment of the present invention, Figure 2 is a diagram showing energy consumption efficiency with respect to air temperature, Figures 3 and 4 are diagrams showing energy consumption efficiency with respect to air temperature.
The figure is a diagram explaining the operating state in the above embodiment, and FIG. 5 is a schematic diagram of a conventional example. 1a... 1st outdoor unit 7), 1b... 2nd outdoor unit, 1c... 3rd outdoor unit, 1d... 4th outdoor unit, 2... indoor unit, 11... supply Air passage, 12... Exhaust passage, 13... Main filter, 14a... First indoor heat exchanger, +46... Second
Indoor heat exchanger, 14c...Third indoor heat exchanger, 1
4cl...4th indoor heat exchanger. Patent applicant: Niimi Kogyo Co., Ltd. Representative: Mr. Ibuji, mentioned above.

Claims (1)

[Claims] (1) An indoor unit in which a plurality of indoor heat exchangers are arranged along the air supply direction in the air supply passage, and a plurality of outdoor units each having an outdoor heat exchanger and a compressor are provided, and each of the above An air conditioner characterized in that an outdoor unit is connected to each indoor heat exchanger of the indoor unit.