JPH085137A - Air-conditioner - Google Patents

Abstract

PURPOSE:To stabilize the heat-exchanging capability by providing a damper which performs an air volume adjustment to a condenser and evaporator, in a draft duct of an air-conditioner main body, which is provided on a roof. CONSTITUTION:In a draft duct 12 of an air-conditioner main body, which is provided on a roof, an air filter 9, a blower 14, a condenser 10 and an evaporator 11 are arranged. Air which is heat-exchanged by the evaporator 11 passes a ventilation duct 4, and is blown out to the indoor side from an outlet unit 5. A partitioning plate 15 which divides the draft duct 12 into the top and bottom is arranged between the condenser 10 and evaporator 11. At the leading end of the partitioning plate 15, a damper 16 which is rotated by a stepping motor 19 is provided. Also, in the air filter 9, a temperature-detecting means 17 which detects the temperature of suction air is provided. When the temperature of suction air becomes a specified value or higher, a control unit 18 controls the stepping motor 19, and the damper 16 is tilted to the evaporator 11 side. When the damper 16 is tilted, an air volume to the condenser 10 is increased, and the heat-exchanging capability is stabilized even when the temperature or suction air ascends.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the internal structure of an air conditioner installed on a roof.

[0002]

2. Description of the Related Art A shop (building) such as a station platform does not have enough space to install an air conditioner in the surrounding area, so that it is proposed to install it on the roof of the shop. . FIG. 2 shows an example thereof, in which an air suction port 22 is provided on one side of the air conditioner body 21.
There are outlets 23, 24 on the upper and bottom portions on the other side, and an inlet 22 of an air passage 25 connecting the inlet 22 and the upper and lower outlets 23, 24.
An air filter 26 is provided at the side, a blower 27 is provided at the center, a condenser 28 is provided at the upper outlet 23 side, and an evaporator 29 is provided at the lower outlet 24 side. The air heat-exchanged by 29 is passed through a ventilation duct 31 provided with an opening in the roof 30 and is sent out into the store from a blowout unit 32 connected to the lower opening of the ventilation duct 31. . A partition plate 33 that divides the air passage 25 into upper and lower parts is provided between the condenser 28 and the evaporator 29.

[0003]

By the way, in this type of air conditioner, when the intake air temperature rises, the heat exchange performance deteriorates and the discharge pressure and the discharge refrigerant temperature in the refrigeration cycle rise, so that the so-called overload condition occurs. It is easy to fall, and the temperature of the air blown out into the room rises, which reduces comfort. Therefore, in the past, in order to prevent the refrigeration cycle from becoming overloaded, the condenser was enlarged to promote heat exchange, but if the condenser is large, the air conditioner body also becomes large, It is also disadvantageous in terms of cost. Therefore, it is an object of the present invention to provide an air conditioner that solves these problems.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has an air intake port on one side of an air conditioner main body installed on a roof and an upper part on the other side. An air filter is provided at the bottom and an air filter is provided at the suction port side of the air passage that connects the suction port and the upper and lower two blow ports, respectively, a blower is provided at the center, and a condenser is provided at the upper outlet side.
Evaporators are arranged on the lower outlet side, respectively, and the air that has undergone heat exchange by the evaporator is passed through a ventilation duct installed with an opening on the roof, and is connected to the lower opening of the ventilation duct. In the case where the air is sent from the unit indoors, a damper that adjusts the air volume to the condenser and the evaporator is installed in the air passage, and the damper is controlled to increase the air volume to the condenser when overloaded. I chose

[0005]

With the above construction, when the refrigeration cycle becomes overloaded due to the rise in intake air temperature, the damper operates and the air volume to the condenser increases, so the heat exchange amount also increases and the overload condition occurs. Is eliminated.

[0006]

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows the internal structure of an air conditioner installed on a roof and the installation members of the air conditioner, where 1 is an air conditioner main body, 2 is a leg that supports the air conditioner main body 1,
3 is a flat roof of a shop at a station, 4 is a ventilation duct installed with an opening in the roof, and 5 is connected to the lower opening of the ventilation duct 4 to adjust the wind direction to the inside (inside the store) It is the blowout unit. On one side of the air conditioner body 1, there is an air (outside air) intake port 6, on the other side there is an air outlet 7 to the outside at the top and at the bottom there is an air outlet 8 to the inside.
An air filter 9 is provided in the air outlet 7, a condenser 10 is provided in the air outlet 7, and an evaporator 11 is provided above the air outlet 8.
A partition plate 13 having a ventilation hole (bell mouth) is erected at the center of an air passage 12 connecting the suction port 6 and the air outlets 7 and 8, and a blower 14 is provided at the center thereof.

Further, between the condenser 10 and the evaporator 11, there is a partition plate 15 which divides the air passage 12 into upper and lower parts.
A damper 16 for adjusting the air flow rate to the condenser 10 and the evaporator 11 is provided at the tip of the. On the other hand, inside the suction port 6 (air filter 9), a temperature detecting means 17 for detecting the suction air temperature is provided. The output signal of the temperature detecting means 17 is input to a control section (microcomputer) 18 provided on the machine room side (not shown). The control unit 18 controls the stepping motor 19 when the intake air temperature detected by the temperature detecting means 17 is equal to or higher than a predetermined value, and tilts the damper 16 held in a substantially horizontal state toward the evaporator 11 side. . In such a state, the air volume to the evaporator 11 decreases, but the air volume to the condenser 10 can be increased and the heat exchange amount increases.

[0008]

According to the air conditioner as described above, by changing the air volume by switching the damper, the optimum refrigeration cycle can be maintained even when overloaded, so that the condenser can be downsized. Is possible. In addition, it is possible to suppress the rise in the temperature of the air blown indoors and improve comfort.

[Brief description of drawings]

FIG. 1 is an internal configuration diagram of an air conditioner showing an embodiment of the present invention.

FIG. 2 is an internal configuration diagram of an air conditioner showing a conventional example.

[Explanation of symbols]

 1 Air conditioner main body 3 Roof 4 Ventilation duct 5 Blow-out unit 6 Suction port 7 Blow-out port 8 Blow-out port 9 Air filter 10 Condenser 11 Evaporator 12 Air duct 13 Partition plate (Bellmouth) 14 Blower 15 Partition plate 16 Damper 17 Temperature Detection means 18 Control unit (microcomputer) 19 Stepping motor

Claims (3)

[Claims] 1. An air intake port is provided on one side of an air conditioner main body installed on a roof, and air outlets are provided at the top and bottom of the other side, respectively, to connect the air inlet and upper and lower air outlets. An air filter is arranged at the suction port side of the air passage, a blower is arranged at the center, a condenser is arranged at the upper outlet side, and an evaporator is arranged at the lower outlet side, and the air that has undergone heat exchange by the evaporator is arranged. Through a ventilation duct installed with an opening on the roof, and the air is sent out indoors from a blowout unit connected to the lower opening of the ventilation duct, wherein a condenser and an evaporator are provided in the ventilation passage. An air conditioner characterized in that a damper for adjusting the air flow rate to the condenser is provided, and the damper is controlled so that the air flow rate to the condenser increases when the load is overloaded. 2. A temperature detecting means for detecting an intake air temperature is provided inside the suction port of the air passage, and an output signal of the temperature detecting means is input to a control section so that the detected intake air temperature is a predetermined value or more. At this time, the air conditioner according to claim 1, wherein the control unit switches the damper to increase the amount of air flow to the condenser. 3. The air conditioner according to claim 1, wherein the damper is switched by a stepping motor.