JPH08240326A - Air conditioner with duct and manufacture thereof as well as living house suitable for the device - Google Patents

Abstract

PURPOSE: To improve the property of application and the property of maintenance by a method wherein a main duct, connected to the air outlet port of a floor installation type indoor machine, is arranged in a ceiling between the first floor and the second floor of a living house while branch ducts, connected to the main duct, are arranged between ceiling joists in a ceiling between the first floor and the second floor. CONSTITUTION: A machine room 3 for air-conditioning machine is provided so as to be faced to the passage 2 of a residence 1 and the indoor machine 4 of a floor installation type heat pump air-conditioning machine, accommodating a fan, a heat exchanger and the like, is installed in the underfloor of the machine room 3 while an outdoor machine 5, accommodating a compressor, a heat exchanger and the like, which are connected to the indoor machine 4 through a refrigerant piping, is installed in the outside of the house. A main duct 7, connected to the air outlet port of of the indoor machine 4, is arranged in a ceiling between a first floor and a second floor while branch ducts, connected to the main duct 7, are arranged between the joists in the ceiling and an air outlet chamber 9 is connected to the terminal of the branch ducts to control the amount of air from the indoor machine 4 by a damper provided in the air outlet chambers 9. According to this method, the degree of freedom of the design of layout of the duct can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a duct installed in a house or the like.

[0002]

2. Description of the Related Art FIG. 6 is a plan view showing an example of installation and duct installation of a conventional air conditioner shown on page 3 of the Mitsubishi Electric Technical Manual, Home Air Multi System Design Guide (September 1992 edition). is there. In the figure, 4
Is an indoor unit main body such as a heat pump, 12 is a suction chamber connected to the indoor unit main body 4 through three flexible ducts 13, and 14 is the same as 2 on the outlet side of the indoor unit main body.
A plenum chamber connected through a flexible duct 13 of a book, a branch chamber 15 connected through a flexible duct 13 ahead of the plenum chamber 14, and a flexible duct 13 connected to the branch chamber 15 or the plenum chamber 14. It is an outlet connected through. A damper 10 for adjusting the air volume is provided in the middle of the flexible duct 13 corresponding to each outlet 9.
Is provided.

In the conventional practice, the indoor unit body 4 and
The air duct composed of the chamber box 14 and the flexible duct 13 is generally arranged in the ceiling or the back of the house between the first and second floors of the house.

All these duct members are factory manufactured,
They brought it to the construction site and connected each other's ducts at the construction site.

The member for ventilation is omitted in this conventional example.

Next, the operation will be described. By the operation of the blower (not shown) built in the indoor unit body 4, for example, the air in the corridor in the room is sucked from the suction chamber,
Air is blown to each outlet 9 through the plenum chamber 14 and the branch chamber 15 to blow cold and warm air to the room. At this time, the amount of air blown into each room is adjusted by the opening degree of the damper 10. So-called VAV (variable air volume) control is performed.

[0007]

Since the conventional air conditioner with duct is constructed as described above, it seems that the construction at the new construction site of the house is easy at first glance, but due to the large number of ductings. The construction cost was not cheap because we had to stock up a wide variety of parts and distribute the bulky duct to the construction site. Further, since a flexible duct is used to connect the ducts, there is a problem that the connecting portion is disconnected and air leaks. Further, since the pressure loss of the duct greatly differs depending on the bending method and the suspension pitch, it was difficult to reliably blow out the designed air volume from each air outlet 9.

Further, when the duct pipe is installed in the ceiling between the first floor and the second floor, it is impossible to freely design the layout of the duct due to the presence of various tensions and columns in the direction of the floor joist. Also, the back of the hut is relatively free of space and is sufficient as a duct space, but environmentally it is close to the outdoors,
Ordinary heat insulation results in a large heat loss from the duct system, which is against energy conservation.

Further, since the indoor unit main body is embedded in the ceiling, the floor area of the house can be effectively utilized, but noise is generated due to downsizing to fit in the ceiling, difficulty in construction, filter However, there were problems such as the difficulty of maintenance, and the installation of the inspection port for maintenance on the ceiling surface (which is bad in terms of design).

Further, since the damper 10 is placed on the back of the ceiling, it has the same problems as the installation problem of the indoor unit body, such as poor workability and installation of the inspection port.

The present invention has been made in order to solve the above-mentioned problems, and the layout of the duct is not restricted, the workability and maintainability are good, the duct shape is simple and the pressure loss is small, and the heat loss is small. The aim is to obtain an air conditioner with a duct that is economical and highly reliable. Moreover, it aims at obtaining the house suitable for this air conditioner with a duct. Moreover, it aims at providing the manufacturing method of the duct and blow-off chamber suitable for this air conditioning apparatus with a duct.

[0012]

An air conditioner according to the present invention is connected to a heat source machine such as a heat pump and installed on a floor-standing indoor unit installed in a machine room or the like in a house, and an outlet of the indoor unit. A main duct consisting of a plenum chamber connected to the first floor and the second floor of the house, and a joist between the first floor and the second floor of the house connected to the main duct It is provided with a branch duct arranged between them, a blowout chamber connected to an end of the branch duct, and a damper arranged in the blowout chamber for adjusting an air volume from the indoor unit.

Further, the main duct is arranged behind the ceiling of the corridor of the first floor of the house.

Further, the second floor of the house is arranged such that the floor joists are arranged so that the branch duct can extend from the main duct to each room.

Further, the blowout chamber is arranged near the outer wall of the house.

Further, the blowout chamber is arranged near the corridor side of the room of the house.

Further, the main duct and the branch ducts are molded with a heat insulating board made of glass fiber.

Further, the main duct is composed of a plenum chamber.

Further, in a rectangular duct formed by a heat insulating plate, the heat insulating flat plate is dimensionally cut at a factory in advance, and the dimensionally cut product is processed up to a notch for bending, and the product after this processing is processed. The product is made to be a flat plate and is made to be a square duct at the construction site by assembling the product that has been made to be processed and processed.

Further, the blowout chamber is formed by a heat insulating board made of glass fiber.

In addition, in a case where a hole of a blow-out chamber is inserted into the end portion of the branch duct to connect the branch duct and the blow-out chamber, in the construction site, the blow-out chamber of the blow-out chamber is aligned with the mounting position of the branch duct. It is designed to process holes.

Further, the damper is built in the blowout chamber so that it can be detached from the room side of the house.

[0023]

In the air conditioner with duct constructed as described above, the main duct connected to the outlet of the floor-standing indoor unit is arranged in the ceiling above the first and second floors of the house, In addition, a branch duct connected to this main duct is placed between the floor joists between the first and second floors of the house, and a blowout chamber is connected to the end of this branch duct. Since the damper provided adjusts the air volume from the indoor unit, the design of the duct layout is no longer constrained by the direction of the joists of the house and various tensions and pillars.

Further, since the main duct is arranged behind the ceiling of the corridor on the first floor of the house, the branch duct through which the conditioned air flows is shortened.

The arrangement direction of the floor joists on the second floor of the house is
Since the branch ducts are arranged so that they can be extended from the main duct to each room, the joists of the house and various types of stiffeners and columns do not restrain the duct layout design.

Further, since the blowout chamber is arranged at a position close to the outer wall side of the house, the temperature of the outer wall side is made lower than that of the inner wall side.

Further, since the blowout chamber is arranged at a position close to the corridor side of the room of the house, the branch duct for flowing the conditioned air is shortened.

Further, since the main duct and the branch ducts are formed by the heat insulating board made of glass fiber, the sound absorbing effect is improved and the heat loss is reduced.

Further, since the main duct is composed of the plenum chamber, the cross-sectional dimension of the main duct is always constant, and the connection work at the tip of the main duct far from the air outlet of the indoor unit becomes easy, and Pressure loss in the main duct is reduced.

In a rectangular duct formed of a heat insulating plate, the heat insulating flat plate is dimensionally cut in advance at the factory, and the dimensionally cut product is processed up to the notch for bending.
This processed product is distributed in the form of a flat plate, and at the construction site, the processed product that has been distributed is made into an assembled rectangular duct, which makes the distribution easy and the duct for the on-site construction. It will be easier to handle and will be able to be installed smoothly.

Further, since the blowout chamber is formed of the glass fiber heat insulating board, the sound absorbing effect is improved and the heat loss is reduced.

Further, in the one in which the hole of the blowout chamber is inserted into the end portion of the branch duct to connect the branch duct and the blowout chamber, the hole of the blowout chamber is processed at the construction site according to the mounting position of the branch duct. As a result, even if the mounting relationship between the branch duct and the blowout chamber is displaced, the displacement is absorbed and connection is made.

Further, since the damper is built in the blowout chamber so that it can be attached and detached from the room side of the house, the maintenance of the damper is simplified.

[0034]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a house constructed by a wooden frame construction method, a two-by-four construction method, etc., and FIG. 1 shows a plan view of the first floor. 2 is a corridor leading to each room provided in the central part of the house 1, 3 is a machine room for air conditioners facing the corridor 2, which is not shown in the drawing but is provided with a louvered door Has been.

Reference numeral 4 denotes an indoor unit of a floor-standing heat pump air conditioner installed on the floor of the machine room 3, which includes a blower, a heat exchanger and the like (not shown), and can be easily installed, piped and wired. Reference numeral 5 is an outdoor outdoor unit which is connected to the indoor unit by a refrigerant pipe and has a compressor, a heat exchanger and the like (not shown) built therein.

Reference numeral 6 is a vertical duct for air conveyance connected to the upper outlet of the indoor unit 3, and 7 is a main duct which is connected to the vertical duct 6 and which is horizontally installed and comprises a plenum chamber having a constant sectional size. is there. These ducts 6 and 7 are heat insulating boards formed by molding glass fibers with a binder and affixing aluminum foil on the outer surface, and their cross sections are rectangular. Further, the main duct 7 is arranged in the back of the ceiling of the first-floor corridor 2 along the longitudinal direction. The ceiling of the corridor 2 is a down ceiling, and the main duct 7 is housed between the lower end of the floor joist on the second floor and this ceiling plate.

A plurality of branch ducts 8 are connected to the main duct 7, and the connection is connected to the upper surface, side surface, or end surface of the main duct 7. The branch duct has a circular cross section and is made of the same material as the vertical duct 6 and the main duct 7. The branch duct 8 is connected to the main duct 7 at a right angle or on the same axis. However, when designing a building, considering the arrangement of the branch duct 8, the floor joists (not shown) of each room on the second floor Preliminary consideration is made so that the direction of arrangement is parallel to the branch duct 8.

Reference numeral 9 denotes a box-shaped blowout chamber connected to the ends of the branch ducts 8 and made of the same material as the ducts 6, 7 and 8. The blowout chamber 9 may be arranged on the corridor side of the room by shortening the length of the branch duct 8 as much as possible in order to reduce the pressure loss of the duct system.
In order to improve the temperature distribution in the room, the branch duct 8 may be extended to the so-called perimeter zone near the outer wall or window of the room.

The blow-out chamber 9 for the room on the floor may be arranged downward between the floor joists on the second floor so as to blow out the ceiling, or it may be placed inside the wall to blow out the upper wall or the bag. You may make it start from. Further, in the case of the room-use blowout chamber 9 on the second floor, it may be placed upward between the floor joists on the second floor to blow out the floor, or may blow from the bag.

Although not shown, 10 is an electric damper arranged in the blowout chamber 9 and its opening is automatically adjusted based on a signal from a room thermostat of each room (not shown). , Adjust the room temperature and the air flow rate. Reference numeral 11 is a grill provided at the outlet of the blowing chamber 9.

Therefore, by removing the grill 11, the damper 10 can be attached to and detached from the blowout chamber 9.

Next, construction of the first embodiment, particularly construction of the duct portion will be described. Generally, the cross-sectional size of the main duct 7 is substantially determined by the required air volume corresponding to the air conditioning capacity and how much the external static pressure of the air conditioner is set. If the duct has a large cross-sectional area and the external static pressure is reduced, the driving power of the blower of the indoor unit 4 can be reduced, which leads to energy saving operation and noise reduction, which is preferable. However, even when the static pressure outside the machine is set as small as 10 mmAq in consideration of the narrow space above the ceiling, the inner dimension of the main duct 7 corresponding to the air conditioning capacity of 8 Kw is 450 mm wide.
mm, height 150 mm.

The heat insulating board is cut in advance to a size of (width + height) × 2 + assembly margin at the factory, and V-cut and step processing necessary for assembling into a box shape are performed. Stock in this state and transport it to the construction site of the new house. It is difficult to manage the ducts having a plurality of dimensional specifications in stock. Therefore, the size of the main duct 7 is determined to be one type if possible. At the construction site, the plate-shaped main duct 7 is box-shaped,
Taping and assembling. A plurality of the assembled main ducts are connected to have a required length. Further, the connection hole with the branch duct 8 can be opened at the site.

The inner diameter of the branch duct 8 is required to be 150 mm for full-scale cooling. The branch duct 8 is made by cutting a straight tubular material into a required length on site. In addition, the bent portion is processed in advance at the factory, or is manufactured by obliquely cutting a straight pipe on site. When the processing is performed on-site in this manner, even if the mounting relationship between the branch duct and the blowout chamber is displaced, the displacement is absorbed and the connection is made. Therefore, there is an advantage that the number of joints for the displacement correction is small.

It is desirable that the shapes of the connecting portions of the main duct 7 and the branch ducts 8 are unified into about two types. In order to reduce the pressure loss of the connection where the air flow branches, avoid abrupt reduction of the cross section, branch it at an angle, or cut off from the root to the tip so that the wind velocity passing through the main duct 7 becomes constant. It is desirable to reduce the area so that the duct cross-sectional area has a uniform wind speed, but conversely, it costs design and construction, which is not always desirable. If the shapes and dimensions of the connecting portions are unified, the construction becomes easier and the pressure loss becomes known in advance, which facilitates the design regarding the air volume distribution. Therefore, the pressure loss characteristic of the duct can be converted into data in advance and incorporated in the control algorithm for automatically adjusting the air volume distribution to each room in the variable air volume control using the damper.

The blowing chamber 9 is also the same as the main duct 7.
The time and effort of construction can be saved if the members in the expanded shape are manufactured at the factory in advance and assembled in a box at the construction site. Further, it is preferable that the connection hole of the branch duct 8 to the blowout chamber is opened at the construction site. The reason is that the branch duct 8 can be connected to any of the five surfaces except the surface of the blowing grill, and if the blowing chamber 9 is provided with a hole or a flange for connection in advance, This is because you will have to keep about three extra stocks.

Next, the operation of the first embodiment after construction will be described. The air blown from the indoor unit 4 passes through the vertical duct 6 and the main duct 7
to go into. The main duct is a kind of plenum chamber,
The pressure loss here is small. However, if the main duct is too long, the effect of pressure loss begins to occur, so it is necessary to set the lengths of the vertical duct 6 to the left and right 7 m or less.

The air is distributed from the main duct 7 to the branch ducts 8. If the duct resistances of the branch ducts 8 are significantly different, the air flow distribution is different. Moreover, the required air volume from each room also differs because the heat load varies depending on the size of the room, the internal load, the effect of solar radiation, and the like. However, this Example 1
Since the ducting of is composed of the main duct 7 of the expanded plenum type and the straight tubular branch duct 8 connected to this in a simple shape, the pressure loss of each branch duct system can be suppressed to a small amount, Is well distributed. The pressure loss of the branch duct system is mainly dominated by the pressure loss value of the connecting portion in the air passage from the blowout chambers 9 to 11 to the main duct 7.

The required air volume to each room is obtained from the difference between the room temperature set by the room thermostat and the detected room temperature.
The opening of is adjusted so that the damper in the room with the highest heat load is fully opened, and the dampers in the other rooms are narrowed down to blow air to control the room temperature.

Although a filter (not shown) is incorporated in the indoor unit 4, the user can easily clean and maintain the inside of the machine room 3 even if the filter is contaminated by the blowing operation.

In addition, the indoor unit 4 and the damper 10 which include electrical equipment
Construction work can be easily performed without changing the structure of the building even during maintenance or replacement of the product.

[0052]

Since the present invention is configured as described above, it has the following effects.

A main duct consisting of a plenum chamber connected to the air outlet of a floor-standing type indoor unit is arranged in the ceiling between the first and second floors of a house, and a branch duct connected to this main duct. Is placed between the floors of the ceiling between the 1st and 2nd floors of the house, the outlet chamber is connected to the end of this branch duct, and the damper installed in this outlet chamber uses the air volume from the indoor unit. Since the layout of the house is not constrained by the direction of the joists of the house and various tensions and pillars, and there is no need to make a hole in the joists of the floor to pass through the duct. An air conditioner is obtained.

Further, since the main duct is arranged above the ceiling of the corridor on the first floor of the house, the branch duct for flowing the conditioned air is shortened, so that heat loss and pressure loss are reduced, which is economical and sound-saving. An air conditioner with a duct that is quiet is obtained.

In addition, the arrangement direction of the floor joists on the second floor of the house is
Since the branch ducts are arranged so that they can extend from the main duct to each room, the floor floor joists and various types of stiffeners / columns do not constrain the duct layout design. can get.

Further, since the blowout chamber is arranged at a position closer to the outer wall side of the house, the temperature on the outer wall side is made lower than that on the inner wall side, so that a comfortable air conditioner with a duct having a well-balanced thermal sensation can be obtained. . .

Further, since the blowing chamber is arranged at a position near the corridor side of the room of the house, the branch duct for flowing the conditioned air is shortened, so that the heat loss and the pressure loss are reduced, which is economical and produces no noise. An air conditioner with a quiet duct can be obtained.

Further, since the main duct and the branch ducts are formed of a glass fiber insulation board, the sound absorbing effect is improved and the heat loss is reduced, so that the air conditioning with the duct is economical and quiet. The device is obtained.

Further, since the main duct is composed of the plenum chamber, the cross-sectional dimension of the main duct is always constant, and the connection work at the tip of the main duct far from the air outlet of the indoor unit is facilitated. Since the pressure loss of the main duct is small, it is possible to obtain an air conditioner with a duct that is easy to install, economical, and quiet.

Further, in a rectangular duct formed by a heat insulating plate, the heat insulating flat plate is dimensionally cut at a factory in advance, and the dimensionally cut product is processed up to a notch for bending, and the product after this processing is processed. Since the product is made into a flat plate shape and the processed product that has been made to be distributed is assembled into a rectangular duct at the construction site, the distribution is easy, and the duct is easily handled at the site construction. -A method for manufacturing a duct of an air conditioner with a duct that can be installed on a floor is obtained.

Further, since the blowout chamber is formed of the heat insulating board made of glass fiber, the sound absorbing effect is improved and the heat loss is reduced, so that an economical air-conditioning apparatus with a duct can be obtained.

In addition, in the case where the hole of the blowout chamber is inserted into the end portion of the branch duct to connect the branch duct and the blowout chamber, the hole of the blowout chamber is processed at the construction site in accordance with the installation position of the branch duct. As a result, even if the installation relationship between the branch duct and the blowout chamber is misaligned, the misalignment is absorbed and the connection is made. The method of manufacturing the hole of is obtained.

Further, since the damper is built in the blowout chamber so that it can be attached and detached from the room side of the house, the maintenance of the damper is simplified, so that an air conditioner with a duct which is easy to use can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a first floor of a house in which an air conditioner according to a first embodiment of the present invention is installed.

FIG. 2 is an enlarged plan view of the air conditioner of FIG.

FIG. 3 is a side view of FIG.

4 is a sectional view taken along line 4-4 of FIG.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view of a conventional air conditioner.

[Explanation of symbols]

2 corridors, 3 machine rooms, 4 indoor units, 5 outdoor units, 7
Main duct, 8 branch ducts, 9 outlet chambers, 10
damper.

Claims (11)

[Claims] 1. A floor-standing indoor unit that is connected to a heat source machine such as a heat pump and is installed in a machine room or the like in a house, and an outlet of this indoor unit that connects the first floor and the second floor of the house. Main duct arranged in the space above the ceiling, a branch duct connected to this main duct, arranged between the floor joists between the first and second floors of the house, and connected to the end of this branch duct An air conditioner with a duct, comprising: the blowout chamber and a damper that is disposed in the blowout chamber and adjusts an air volume from the indoor unit. 2. The air conditioner with a duct according to claim 2, wherein the main duct is arranged behind the ceiling of the corridor on the first floor of the house. 3. The arrangement direction of the floor joists on the second floor of the house,
A housing for an air conditioner with a duct, characterized in that the branch ducts are arranged so as to extend from the main duct to each room. 4. The ducted air conditioner according to claim 1, wherein the blowout chamber is arranged at a position close to the outer wall side of the house. 5. The air conditioner with a duct according to claim 1, wherein the blowout chamber is arranged near a corridor side of the room of the house. 6. The air conditioner with a duct according to claim 1, wherein the main duct and the branch duct are molded from a heat insulating board made of glass fiber. 7. The air conditioner with a duct according to claim 1, wherein the main duct comprises a plenum chamber. 8. In a rectangular duct formed of a heat insulating plate, the heat insulating flat plate is dimensionally cut at a factory in advance, and the dimensionally cut product is processed up to a notch for bending,
A method for manufacturing a duct of an air conditioner with a duct, characterized in that the processed product is distributed in a flat plate shape, and the processed product thus distributed is assembled into a rectangular duct at a construction site. . 9. The air conditioner with a duct according to claim 1, wherein the blowout chamber is formed by a heat insulating board made of glass fiber. 10. A device for connecting the branch duct and the blowout chamber by inserting a hole of the blowout chamber into the end portion of the branch duct, wherein the blowout chamber of the blowout chamber is fitted to the installation position of the branch duct at a construction site. A method of manufacturing a hole in an outlet chamber of an air conditioner with a duct, characterized in that the hole is processed. 11. The air conditioner with a duct according to claim 1, wherein the damper is built in the blowout chamber so as to be detachable from the room side of the house.