JPH04306428A - Air conditioner - Google Patents

Abstract

PURPOSE:To simplify a structure, make a small-sized structure and prevent a short circuit of air supplying within a duct chamber from being applied by a method wherein a duct communicating a heat exchanging and ventilating machine with an indoor area is also acted as one for an air conditioner and air supplying is fed into the room through a duct chamber and the air conditioner. CONSTITUTION:Under an operating condition of an air conditioner, an opening or closing damper 75 is released to open, so that a part of returned air fed from an indoor area 1 into a duct chamber 70 is discharged out of a room through a heat exchanger 9 or a bypassing passage 90 and the remaining air is circulated into the room 1 through an indoor device 5. Supplied air fed from an air supplying blowing port 92 into the duct chamber 70 from an outdoor area through the heat exchanger 9 is fed from a fed air blowing port 92 into the duct chamber 70 is fed from an indoor blowing port 64 into a room through the indoor device 3. Supplying air more than a discharging amount is supplied from the air supplying blowing port 92 into the duct chamber 70 with an air flow in the duct chamber 70. However, an amount of supplying air is adjusted by a feeding amount adjusting damper 80 in response to an amount of feeding surplus air, thereby an amount of supplying or discharging is balanced.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a heat exchange ventilator that guides air supply from the outdoors and exhaust air from the room to a heat exchanger to exchange heat and ventilate the air, and an air conditioner that performs indoor air conditioning. The present invention relates to an air conditioner equipped with the following.

0002

[Prior Art] Conventionally, in order to reduce the energy required for air conditioning and provide comfortable air conditioning, there has been a system in which outside air is supplied from outside to indoors, and air is exhausted from indoors to outside. An air conditioner using a heat exchange ventilator that performs heat exchange is used, and its basic configuration is shown in FIG. 10.

This air conditioner ventilates a room 1 using a heat exchange ventilator 2, and controls the temperature and humidity inside the room 1 using an air conditioner 5 having an indoor unit 3 and an outdoor unit 4. This is what I did. Air in the room 1 is led into the heat exchange ventilator 2 through a duct 8 from an exhaust suction port 7a formed in a facing plate 7 provided on the ceiling 6.
From the exhaust fan 10 to the duct 1 via the internal heat exchanger 9
1 and is discharged outdoors from the vent cap 12. On the other hand, outdoor air flows from the vent cap 13 to the duct 1.
The air is led into the heat exchange ventilator 2 through the heat exchanger 4, and then through the heat exchanger 9, from the air supply fan 15 to the duct 16, and further through the air supply outlet 17 formed in the facing plate 17 provided on the ceiling 6.
Air is supplied into the room 1 from a.

The indoor unit 3 of the air conditioner 5 is equipped with a heat exchanger 20 in which a refrigerant is circulated between the indoor unit 3 and the outdoor unit 4. Indoor air that has been returned to the space on one side of the heat exchanger 20 from the suction port 21 formed in the facing plate 26 provided on the ceiling 6 is heated or cooled by the heat exchanger 20, and then passed through the heat exchanger 20. 20 from the circulation fan 22 provided on the other side of the mounting plate 2
The air is blown into the chamber 1 through the air outlet 23 formed at 6. 24 is a filter for collecting dust, and 25 is a drain pan.

A remote control unit 30 is installed at a suitable location within the room 1 and is connected to a switch box 31 of the indoor unit 3 to control the operations of the air conditioner 5 and the heat exchange ventilator 2. The switch box 31 and the switch box 32 of the heat exchange ventilator 2 are connected via a signal line 33, so that heat can be adjusted in response to setting operations by the remote control unit 30, operating status of the air conditioner 5, etc. The operation of the exchange ventilator 2 can be varied.

[0006]

[Problems to be Solved by the Invention] In the above-mentioned prior art, the heat exchange ventilator 2 has an inlet 7a from the room 1 and an outlet 17a into the room 1; The indoor unit 3 had an inlet 21 from the chamber 1 and an outlet 23 to the chamber 1. Therefore, the number of ducts increases and the length of the ducts tends to increase, leading to an increase in the size of the entire device.

Furthermore, the operating noise of the supply/exhaust fans 15 and 10 propagates into the room 1 through the ducts 16 and 8, causing noise. Furthermore, since four suction ports and four air outlets were opened in the chamber 1, the appearance was also unfavorable. In addition, as mentioned above, there are four suction ports and four air outlets, so if it is difficult to secure a sufficient distance between the suction port and the air outlet, the supply air from the air outlet can be immediately sucked in. There was also the problem that a so-called short circuit phenomenon occurred, in which the air was exhausted through the mouth.

[0008] Therefore, the indoor unit 3 of the air conditioner 5 and its indoor suction port are connected via a duct, and the exhaust suction port of the heat exchange ventilator 2 is communicated with the middle part of this duct. At the same time, an air supply outlet is communicated with the downstream side of the duct so that a part of the indoor air introduced into the duct is exhausted by the heat exchange ventilator 2, and the air supply from the heat exchange ventilator 2 is It is conceivable to supply the air to the room 1 through the indoor unit 3 and its outlet 23. In this case, the indoor side suction port 7 and the indoor side outlet port 17 of the heat exchange ventilator 2 can be omitted, and the supply/exhaust fan 15
, 10 can be prevented from directly propagating into the room 1. In addition, the air supply from the heat exchange ventilator 2 can be guided to the indoor unit 3 side to prevent the short circuit phenomenon described above from occurring.

However, in this case, the airflow in the duct acts as a resistance to the intake of air into the heat exchange ventilator 2 at the exhaust suction port, and acts as a resistance to the intake of air into the duct at the air supply outlet. Since it acts to help blow out air, even though the air supply fan 15 and the exhaust fan 10 are designed to have the same air blowing capacity, the heat exchange ventilator 2 supplies air in excess of the exhaust amount to the indoor unit. As a result, a new problem arises in that the balance between air supply and exhaust volume is lost, the pressure in the chamber 1 increases, and the heat exchange efficiency in the heat exchange ventilator 2 decreases.

The present invention has been made in view of the above-mentioned problems, and provides an air conditioner that is small in size, can reduce operating noise, is free from the risk of short-circuiting, and can adjust the balance of air supply and exhaust volume. The purpose is to provide

[0011]

[Means for Solving the Problems] To achieve the above object, the air conditioner of the present invention circulates air introduced from a room through a return air duct into the room through an indoor outlet. An air conditioner that performs air conditioning, and a heat exchange ventilator that performs ventilation while exchanging heat with a heat exchanger between supply air introduced from outdoors by an air supply fan and exhaust air discharged from indoors to the outdoors by an exhaust fan. The air conditioner includes a duct chamber interposed in the middle of the return air duct and integrally formed with the casing of the heat exchange ventilator, and an exhaust gas that opens in the duct chamber and is discharged outdoors. an exhaust suction port that leads the air to the heat exchanger side;
an air supply outlet that is opened downstream in the return air direction than the exhaust air intake in the duct chamber and guides the air supply introduced by the air intake fan from outdoors into the duct chamber; It is equipped with an air supply amount adjustment damper that adjusts the amount of air supply.

[0012]However, the above air conditioner may be equipped with a rotation speed control means for adjusting the air supply amount by controlling the rotation speed of the air supply fan instead of the air supply amount adjustment damper. good.

[0013]

[Operation] According to the air conditioner having the above configuration, a part of the return air introduced into the duct chamber from the room through the return air duct is exhausted outdoors from the exhaust suction port through the heat exchanger. , the rest is circulated indoors from the indoor air outlet via the air conditioner. Furthermore, the air supplied from the outdoors through the heat exchanger and into the duct chamber is introduced into the room from the indoor side outlet via the air conditioner. At this time, by adjusting the amount of air supply using the air supply amount adjustment damper, the amount of air supply and exhaust in the room can be balanced. Furthermore, when a rotation speed control means is provided instead of the duct, the amount of air supply and exhaust in the room can be balanced by controlling the rotation speed of the air supply fan and adjusting the amount of air supply.

[0014] Conventionally, a dedicated duct was provided to communicate between the heat exchange ventilator and the room, but this is now also used by the duct of the air conditioner, and moreover, the duct chamber is integrated with the casing of the heat exchange ventilator. Since it has been
The entire air conditioner can be downsized. In addition, since the number of duct holes opened into the room is only two, the appearance is more favorable than when many holes are opened.

[0015] Furthermore, since the supply air from the outdoors is introduced into the room through the duct chamber and the air conditioner, the propagation of the operation noise of the supply/exhaust fan into the room is weakened. Furthermore, in the duct chamber, the supply air outlet is provided on the downstream side in the return air direction than the exhaust suction port, so that the supply air introduced from the supply air outlet into the duct chamber is There is no risk of short-circuiting inside the tank and exhaust to the outside through the exhaust suction port.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples will be explained in detail below with reference to the accompanying drawings showing examples. FIG. 3 is a perspective view showing the overall schematic configuration of an air conditioner as an embodiment of the present invention. Referring to the same figure, this air conditioner is placed in the attic space.
The main part is composed of a heat exchange ventilator 2 and an air conditioner 5.

FIG. 1 is a front view mainly showing the internal structure of the heat exchange ventilator 2, and FIG. 2 is a side view of the heat exchange ventilator 2.
Referring to FIGS. 3 to 3, the air conditioner 5 includes an outdoor unit 4 having a built-in compressor and the like, and an indoor unit 3 having a built-in heat exchanger and circulation fan (not shown). The indoor unit 3 draws the air inside the room 1 from the indoor suction port 63 to the return air duct 60.
into the duct 6 with the temperature and humidity adjusted.
2 into the room 1 from the indoor air outlet 64. A duct chamber 70 formed integrally with the casing 2a of the heat exchange ventilator 2 is interposed in the return air duct 60.

Inside the casing 2a of the heat exchange ventilator 2,
A heat exchanger 9, an air supply fan 15, an exhaust fan 10, and the like having the same amount of air are built in. M1 in drawing code
, M2 are motors that drive the air supply fan 15 and the exhaust fan 10. An air supply duct 14 for introducing outside air from the outdoor suction port 14a to the passage 81 side and an exhaust duct 11 for discharging indoor air from the outdoor air outlet 11a are connected to the upper part of the casing 2a. There is. Further, a switching damper 85 driven by a motor (not shown) is disposed within the casing 2a. When the switching damper 85 is in the position shown by the solid line in FIG.
8 to the exhaust duct 11. In addition, when the switching damper 85 is in the position shown by the two-dot chain line in FIG. lead. In this way, the switching damper 85
By the switching operation, it is possible to switch between heat exchange ventilation, which exchanges heat between supply air and exhaust air, and normal return air, which avoids heat exchanger exchange between supply air and exhaust air.

In the duct chamber 70, an exhaust suction port 91 is opened on the upstream side in the return air direction A, and a supply air outlet 92 is opened on the downstream side. The exhaust suction port 91 connects the inside of the duct chamber 70 and the air supply duct 14.
are connected to each other via a heat exchanger 9, and indoor air is sent to the heat exchanger 9 side. The air supply outlet 92 connects the exhaust inlet 91, the inside of the duct chamber 70, and the exhaust duct 11.
The duct chamber 70 is in communication with the duct chamber 70 through a heat exchanger 9, and outside air that has passed through the heat exchanger 9 is introduced into the duct chamber 70.

An opening/closing damper 75 is provided between the exhaust air inlet 91 and the air supply outlet 92 in the duct chamber 70.
is provided. This opening/closing damper 75 has a rotating shaft 76
By creating a difference in weight between the half body 75a and the half body 75b with the rotation axis 76 as the boundary, the half body 75a is placed upright in the natural state with the half body 75a positioned on the lower side. There is. That is, when the operation of the air conditioner 5 is stopped, the opening/closing damper 75 stands upright and partitions the inside of the duct chamber 70 into the exhaust suction port 91 side and the air supply outlet 92 side. Furthermore, when the air conditioner 5 is in operation, the opening/closing damper 75 is placed in a substantially horizontal state due to the wind pressure caused by the return air, allowing the air to flow toward the air conditioner 2 side. In addition,
The opening/closing damper 75 may be driven by a motor (not shown).

Furthermore, a supply air amount adjusting damper 80 is provided at the connection port 2b of the heat exchange ventilator 2 to the supply air duct 14. This air supply amount adjusting damper 80 adjusts the amount of air supplied by the air supply fan 15 by adjusting the opening area of the connection port 2b, and is shown in FIGS. 4 and 5.
As shown in the figure, a shutter plate 80b opens and closes the connection port 2b.
and a support shaft 80a that supports this shutter plate 80b.
It includes a lever 80c for rotating the shutter plate 80b via a support shaft 80a, and a locking mechanism 80d for locking the lever 80c at a desired rotational position and holding the shutter plate 80b at a predetermined angle. ing. The locking mechanism 80d includes a semicircular guide plate 80e arranged concentrically with the rotation center of the lever 80c.
The lever 80c is locked by introducing the threaded part formed at the tip of the lever 80c into the guide groove 80f formed in the guide plate 80e and pressing the wing nut 80g screwed into the threaded part against the guide plate 80e. Can be done.

According to this embodiment, when the air conditioner 5 is in operation, the opening/closing damper 75 is open, so that the room 1
A part (for example, 20%) of the return air introduced into the duct chamber 70 from inside via the return air duct 60 is discharged to the outside from the exhaust suction port 71 via the heat exchanger 9 or the bypass passage 90. , the remainder is circulated into the room 1 from the indoor air outlet 64 via the indoor unit 5. In addition, the air supplied from the outdoors into the duct chamber 70 from the air supply outlet 92 via the heat exchanger 9 is introduced into the room from the indoor outlet 64 via the indoor unit 3. Here, due to the air flow in the duct chamber 70, air supply in excess of the exhaust amount is supplied from the air supply outlet 92 to the duct chamber 70, but the above-mentioned air supply amount adjustment is performed in response to this surplus air supply amount. By restricting the amount of air supply with the damper 80, the amount of air supply and exhaust can be balanced.

FIG. 6 is a graph for determining the amount of reduction of the air supply amount by the air supply amount adjusting damper 80, that is, the opening/closing angle of the shutter plate 80b. Using this graph, for example, if the air volume at connection port 2b is 1000 m3/h
, static pressure 15mm H2O, duct chamber 70
To find the opening/closing angle of the shutter plate 80b when the negative pressure is 5 mmH2O, first, the air volume is 1000 m
The maximum static pressure P1=17mmH2O at 3/h is determined from graph X. The static pressure P2 at the outdoor suction port 14a required to balance the supply and exhaust amount is 15 mmH2 O - 5 mmH2 O = 10 mmH2
Since the above maximum static pressure P1 to P2 = 10 mmH
The opening/closing angle of the shutter plate 80b corresponding to the pressure P3=7 mmH2, which is lowered by 2 O, can be found from the graph Y showing the damper characteristics.
The opening/closing angle of b = 10° is determined.

In the above embodiment, the inside of the duct chamber 70 is partitioned off by the opening/closing damper 75 when the operation of the air conditioner 5 is stopped. All of the air introduced into the chamber 70 flows through the exhaust suction port 91 to the heat exchanger 9.
Alternatively, it is discharged outdoors via the bypass passage 90. The flow of air supply from outdoors is the same as the operating state of the air conditioner 5.

Furthermore, the above embodiment also has the following advantages. ■The duct that communicates the conventional heat exchange ventilator 2 and the interior of the room 1 is also used by the return air duct 60 and duct 62 of the air conditioner 5, and the duct chamber 70 is connected to the casing of the heat exchange ventilator 2. Since it is integrated with 2a,
The entire air conditioner can be downsized.

2) Since only two duct ports, the suction port 63 and the blowout port 64, are required to be opened in the room 1, the appearance is more preferable than the case where many duct ports are opened. ■Air is supplied from outdoors to the duct chamber 70 and the indoor unit 3.
Since the air is introduced into the room 1 through the air supply fan 15 and the exhaust fan 10, the propagation of the operating noise of the air supply fan 15 and the exhaust fan 10 into the room 1 can be weakened, and the noise can be reduced. ■In the duct chamber 70, the air supply outlet 92
is provided on the downstream side of the exhaust air suction port 91 in the return air direction A, so that the duct chamber 7 is
There is no risk that the supply air introduced into the duct chamber 70 will be short-circuited within the duct chamber 70 and be discharged outdoors via the exhaust suction port 91. ■Since the supply air from the outdoors introduced into the duct chamber 70 and the return air from inside the room 1 are mixed, it is possible to avoid temperature imbalances, thereby preventing the occurrence of dew condensation. . ■As mentioned above, the opening/closing damper 75 allows the inside of the duct chamber 70 to be connected to the exhaust suction port 91 side and the supply air outlet 92 side.
Since it is partitioned into two sides, it is possible to operate only the heat exchange ventilator 2 individually even though it is also used as a duct.

The supply air amount adjusting damper 80 may be configured to adjust the opening/closing angle of the shutter plate 80b using a motor. The shutter plate 80b
By adjusting the opening/closing angle of the air supply, the air supply amount can be adjusted more precisely. Furthermore, in place of the air supply amount adjusting damper 80, a rotation speed control means S for controlling the fan rotation speed of the air supply fan 15, that is, the rotation speed of the motor M1, is provided so that the air supply amount is balanced. (see the two-dot chain line in FIG. 1). In this case, the rotation speed of the motor M1 is adjusted so that the static pressure at the outdoor suction port 14a as shown by the broken line in FIG. 6 is obtained. Just adjust it. Also in this embodiment, the motor M
By adjusting the number of revolutions of the engine, the air supply amount can be adjusted more precisely.

[0027] In the above, a case has been explained in which the amount of air supply and exhaust is balanced by reducing the amount of air supplied. There may be a case where it is desired to upset the balance and increase the pressure in chamber 1. Therefore, if necessary, the air supply amount adjusting damper 80 may be adjusted to increase the amount of air supply, or the rotation speed of the motor M1 may be increased.

On the other hand, the opening/closing damper 75 can be omitted, but it is preferable to provide the opening/closing damper 75 because it allows the heat exchange ventilator 2 to operate independently. In addition, in the above embodiment, an example was shown in which the air conditioner 5 was placed in the ceiling, but
It can also be placed on the floor, for example, incorporated into a wall panel 200 as shown in FIG.

Furthermore, as shown in FIGS. 8 and 9, ventilation is carried out from the indoor unit 3 into the room 1 through a plurality of outlet units 310, 320, 330 interposed in a plurality of branch ducts. It is also possible to have a system configuration like this.

[0030]

[Effects of the Invention] As described above, according to the present invention, the duct that connects the heat exchange ventilator and the room is also used for the air conditioner, so the duct dedicated to the conventional heat exchange ventilator is replaced. This is unnecessary, the structure can be simplified and the whole can be made smaller, and the number of duct ports opened into the room can be reduced, which is preferable in terms of appearance.

Furthermore, since the supply air is introduced into the room through the duct chamber and the air conditioner, the operating noise of the supply/exhaust fan is muffled, making it possible to reduce indoor noise. Further, in the duct chamber, the air supply outlet is provided downstream in the return air direction than the exhaust suction port, so that short circuits of the air supply in the duct chamber can be prevented.

Furthermore, since the supply air volume can be adjusted to balance the supply and exhaust volume, it is possible to prevent the room from being unnecessarily pressurized and the heat exchange efficiency of the heat exchange ventilator from decreasing. can do.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an air conditioner of the present invention.

FIG. 2 is a side view showing the internal configuration of the heat exchange ventilator.

FIG. 3 is a schematic perspective view showing an air conditioner.

FIG. 4 is a sectional view of the air supply amount adjusting damper.

FIG. 5 is a front view of the air supply amount adjustment damper.

FIG. 6 is a graph diagram for determining the damper opening/closing angle.

FIG. 7 is a schematic perspective view showing another embodiment.

FIG. 8 is a schematic diagram showing still another embodiment.

FIG. 9 is a schematic perspective view showing still another embodiment.

FIG. 10 is a schematic side view showing the internal configuration of a conventional air conditioner.

[Explanation of symbols]

1 Room 2 Heat exchange ventilation machine 2a Casing 5 Air conditioner 9 Heat exchanger 10 Exhaust fan 15 Air supply fan 60 Return air duct 64 Indoor air outlet 70 Duct chamber 75 Opening/closing damper 80 Air supply adjustment damper 91　Exhaust suction port 92 Air supply outlet S Rotation speed control means

Claims (2)

[Claims] Claim 1: An air conditioner that performs air conditioning by circulating air introduced from inside the room (1) through a return air duct (60) into the room (1) through an indoor outlet (64). Machine (5)
The heat exchanger (9) performs heat exchange between the supply air introduced from the outdoors by the air supply fan (15) and the exhaust air discharged from the room (1) to the outdoors by the exhaust fan (10). In an air conditioner equipped with a heat exchange ventilator (2), the air conditioner is interposed in the middle of the return air duct (60) and formed integrally with the casing (2a) of the heat exchange ventilator (2). A duct chamber (70), an exhaust suction port (91) that is opened in the duct chamber (70) and guides the exhaust gas discharged outdoors to the heat exchanger (9), and , the above exhaust suction port (
a supply air outlet (92) that is opened downstream in the return air direction from the supply air outlet (91) and guides supply air introduced from the outdoors by the supply air fan (15) into the duct chamber (70); An air conditioner characterized by comprising an air supply amount adjustment damper (80) that adjusts the amount of air supplied by the fan (15). Claim 2: An air conditioner that performs air conditioning by circulating air introduced from inside the room (1) through a return air duct (60) into the room (1) through an indoor outlet (64). Machine (5)
The heat exchanger (9) performs heat exchange between the supply air introduced from the outdoors by the air supply fan (15) and the exhaust air discharged from the room (1) to the outdoors by the exhaust fan (10). In an air conditioner equipped with a heat exchange ventilator (2), the air conditioner is interposed in the middle of the return air duct (60) and formed integrally with the casing (2a) of the heat exchange ventilator (2). A duct chamber (70), an exhaust suction port (91) that is opened in the duct chamber (70) and guides the exhaust gas discharged outdoors to the heat exchanger (9), and , the above exhaust suction port (
91), which is opened downstream in the return air direction, and which guides the supply air introduced from the outdoors by the supply air fan (15) into the duct chamber (70), and the heat exchanger. An air conditioner comprising: rotation speed control means (S) for controlling the rotation speed of an air supply fan (15) in order to adjust the amount of air supplied from the air supply fan (9).