JPH0367936A - Duct type air conditioner - Google Patents

Abstract

PURPOSE:To automatically control required functions in response to a sudden change in a cooling or heating load by detecting an indoor negative pressure, opening a motor-operated damper when the negative pressure rises above a value set in advance and taking in outside air by a required amount. CONSTITUTION:In a normal cooling or heating operation, since small difference is present between indoor and outdoor side pressures which is detected by a differential pressure detector provided in a motor casing 16, a damper 17 is closed and an air conditioner achieves a function as a general duct type air conditioner. When a ventilating fan and a range hood separately provided in a living room wherein the duct type air conditioner is mounted are operated at the same time, since a difference between the indoor and outdoor side pressures which is detected by the differential pressure detector is large, the operation of an indoor side blower 12 is controlled via a signal line 20 and an operation controller. That is, the amount of blast is increased via an outside air intake duct 14 to dissolve an indoor negative pressure and increase a cooling or heating output. When a cooling or heating load is very small in a intermediate season, the indoor negative pressure is dissolved by the operation of the indoor side blower 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a duct type air conditioner that is hidden and installed in a ceiling or the like.

BACKGROUND TECHNOLOGY In general, a duct type air conditioner has an indoor heat exchanger 32 and an indoor heat exchanger 32 installed in the ceiling 31, as shown in FIG.
A main body 34 of a duct type air conditioner with a built-in blower 33 for ventilation is installed, and a blow-off chamber 37 having a blow-off outlet 36 provided on the ceiling 2/\-7 surface 35 is installed.
and a suction chamber 40 having a suction port 38 are connected to the main body 34 by a duct 41, respectively. Then, an outdoor unit (not shown) is separately installed to connect to the Doug 1-type air conditioner to configure a refrigeration cycle, and the indoor heat exchanger 32 and refrigerant piping inside the main body 34 are connected to each other. It was connected to enable cooling and heating operation.

Problems to be Solved by the Invention Although conventional configurations like this allow for air conditioning, heating, and dehumidification, it is difficult to smoke, smoke, or smoke in living rooms where the living room and kitchen are combined into a single room, which has been increasing in recent years. Ventilation fans and range hoods are often installed to exhaust cooking odors and smoke outdoors, so when operating these devices, not only does the heating and cooling load suddenly increase, but also airtightness is required. If you live in a high-rise house, you can deal with various problems such as negative pressure inside the living room, the flame from the gas stove going out, and doors becoming difficult to open and close. I had a particular problem. So recently.

In order to solve these various problems, total heat exchange type ventilation fans, heat exchange air devices, etc. have been developed, and devices that can be automatically operated in combination with differential pressure detection devices have also been commercialized. However, even if such products are used in combination, initial costs and construction costs will increase.9
However, they have problems such as spoiling the interior and making it difficult to link each function and automatically control the necessary driving behavior.

The present invention solves these problems by providing an integrated duct type air conditioner that can respond to sudden changes in heating and cooling loads due to ventilation, etc., and that can automatically control necessary functions. The purpose is to provide the following.

Means for Solving the Problem In order to solve this problem, the present invention has five outside air intake duct connection ports in the indoor air suction chamber attached to the main body of the air conditioner, and a connection port for adjusting the amount of outside air intake. The vehicle is equipped with an electric damper, a means for detecting indoor negative pressure, and a means for selectively operating various driving operations.

Function: The above configuration copes with sudden fluctuations in the cooling and heating load that occur when operating ventilation fans and range hoods installed in the same living room, and also detects indoor negative pressure and sets the negative pressure in advance. When the temperature exceeds the specified value, the electric damper opens.
The necessary amount of outside air is taken in to eliminate negative pressure indoors, heated by the indoor heat exchanger, and then supplied into the room.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, the main body 1 of the duct type air conditioner is suspended and fixed to a slab 3 etc. by a hanging bolt /l/l-2, installed inside the ceiling 4, and has a suction port 5 and an air filter 6 etc. It is connected to the chamber 7 via a suction duct 8, and to a blow-off chamber 10 having a blow-off port 9 and the like via a blow-off duct 11. An indoor blower 12 and an indoor heat exchanger 13 are provided in the main body 1 of the duct type air conditioner, and the suction chamber 7 is provided with an outside air intake at a position opposite to the suction duct 8. An outside air intake 15 is provided on the outdoor side of the outside air intake duct 14 to which the outside air intake duct 14 is connected. An electric damper 17 is provided near the suction chamber 7 of the outside air intake duct 14 and is rotated by an electric motor (not shown) provided in the motor case 16. Differential pressure detection device (which is composed of a limit switch and serves as a means of detecting indoor negative pressure)
(not shown above), and its diaphragm has an indoor pressure probe 1 for sampling the indoor pressure.
8 and an outdoor pressure tube 19 for sampling the outdoor pressure, and the other end is connected to the suction chamber 7 and the outside air intake duct 14, respectively, to detect the pressure. Furthermore, the electric motor case 16 includes:
A signal line 20 is provided for controlling the operation of the indoor blower 12 via an operation control device (not shown) as a means for performing a selection operation.

In the above configuration, when performing normal heating and cooling operation, there is almost no difference between the indoor pressure and the outdoor pressure detected by the ax pressure detection device 7.1 (not shown) provided inside the motor case 16. , the electric damper 17 is in the closed position and functions as a general duct type air conditioner. If a ventilation fan and a range hood (both not shown) separately installed in the living room where the duct type air conditioner is installed are operated at the same time, the indoor pressure detected by the differential pressure detection device and the outdoor pressure Since the difference with the pressure becomes large, the operation of the indoor blower 12 is controlled via the signal line 20 button and the operation control device. In other words, the total amount of air blown through the outside air intake duct 14 is increased to eliminate indoor negative pressure and increase the cooling and heating output. When the heating and cooling load is very small during the mid-season period, it is sufficient to eliminate the indoor negative pressure by simply operating the indoor fan 12, and it is also possible to actively draw in outside air at the user's request. It would be even easier to use if a remote control switch (not shown) is provided to select and operate various driving operations.

Effects of the Invention As is clear from the description of the embodiments described above, the present invention provides an indoor air intake chamber connected to the main body of an air conditioner by a duct, an outside air intake duct, and an electric damper for adjusting the amount of outside air intake. a pressure detection device in the motor case connected to the
Equipped with a differential pressure detection device that detects indoor negative pressure, various operations can be selected using a remote control switch.
It eliminates indoor negative pressure when operating ventilation fans, range hoods, etc. at the same time, and can also respond to sudden changes in heating and cooling loads.In winter, when negative pressure is eliminated during exhaust operation as described above, preheating air supply is used. It functions as a device and also has effects such as taking in outside air during the intermediate period and cooling with outside air.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a suction chamber of a duct type air conditioner according to an embodiment of the present invention, Fig. 2 shows an overview of the duct type air conditioner in its constituent countries, and Fig. 3 shows a conventional duct type air conditioner. This is an IG diagram showing an overview of the harmonizer. 7...Suction chamber, 14...Outside air intake duct, 17...Electric damper, 18...
...Indoor pressure vibe, 19...Outdoor pressure vibe.

Claims (1)

[Claims] An outside air intake duct is connected to the indoor air intake chamber connected to the main body of the air conditioner, and an electric damper is installed near the intake chamber to adjust the amount of outside air intake, and the outdoor air pressure is detected. A duct type air conditioner comprising: a means for detecting indoor negative pressure; and a means for selectively operating cooling, heating, outside air intake, or various operating operations that use a combination of these.