JPH0972571A - Air conditioner - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To control the temperature of outside air introduced into a room so that the room temperature does not change due to the introduction of the outside air.
Prevent cold drafts, especially in winter. SOLUTION: Indoor air suction port 5 and heat exchanger 9
And an air outlet 13 and a blower fan 11,
In the air conditioner that blows in air from the indoor air intake port 5 by the blower fan 11 and blows out the air that has passed through the heat exchanger 9 into the room from the air blowout port 13, the space between the indoor air intake port 5 and the air blowout port 13 An outside air intake duct 17 having an open end 21 is provided on the upstream side of the heat exchanger 9 as viewed from the flow of air, and the outside air is introduced on the upstream side of the heat exchanger 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a residential air conditioner with an outside air introduction function.

[0002]

2. Description of the Related Art Some residential air conditioners have an outside air introduction function for indoor ventilation. This air conditioner with an outside air introduction function is disclosed in Japanese Patent Laid-Open No. 3-87533.
As shown in Japanese Patent Publication No.
Having a heat exchanger, an air outlet, and a blower fan,
An indoor unit of an air conditioner that is configured to suck air from the indoor air intake port by a blower fan and blow the air that has passed through the heat exchanger into the room from the air outlet port, with an outside air intake port for ventilation. There, the outside air is taken into the indoor unit through the outside air intake, and this is blown out into the room through the air outlet by the blower fan.

[0003]

In the conventional air conditioner having the outside air introducing function as described above, the heat exchanger is viewed by the air flow between the indoor air intake port and the air outlet port in the indoor unit. The outside air is introduced to the downstream side, and the temperature of the outside air taken into the room is not adjusted. Therefore, cold outside air enters the room as it is in the winter, which causes a cold draft problem. Also, in the summer, warm outside air enters the room as it is and the indoor temperature rises.

The present invention has been made by paying attention to the above-mentioned problems, and the temperature of the outside air introduced into the room is also adjusted so that the temperature of the inside of the room does not fluctuate due to the introduction of the outside air, especially in winter. It is an object of the present invention to provide an air conditioner with an outside air introduction function that is improved so that cold draft does not occur.

[0005]

In order to achieve the above-mentioned object, an air conditioner according to the present invention has an indoor air suction port, a heat exchanger, an air blowing port, and a blower fan. An air conditioner that sucks air from an indoor air intake port by a blower fan and blows air that has passed through a heat exchanger into the room from an air outlet port, and is equipped with an outside air intake duct for taking in outside air into the room,
One end of the outside air intake duct is opened to the outside of the room, the other end is opened to the upstream side of the heat exchanger as seen in the flow of air between the indoor air intake port and the air outlet port,
It is characterized in that the outside air is introduced to the upstream side of the heat exchanger.

The air conditioner according to the present invention further comprises a flow rate control means for controlling the flow rate of the air flowing through the outside air intake duct by controlling the opening ratio of the outside air intake dust. I am trying. Further, the air conditioner according to the present invention has an outside air introduction fan in the outside air intake duct, and has a flow rate control means for controlling the outside air introduction flow rate by controlling the outside air introduction fan. That is a detailed feature.

[0007]

With the above-described structure, the outside air is introduced upstream of the heat exchanger and passes through the heat exchanger,
The temperature of the indoor air is adjusted in the same manner and the air is blown out into the room from the air outlet. Further, the flow rate of the outside air flowing through the outside air intake duct is controlled by the flow rate control means, so that the introduction amount of the outside air can be set to an appropriate amount.

By blowing the outside air through the outside air intake duct by the outside air introduction fan, the amount of introduced outside air can be set to an appropriate amount by controlling the rotation speed of the outside air introduction fan.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show a first embodiment of an air conditioner according to the present invention. In these drawings, reference numeral 1 generally indicates an indoor unit (indoor unit) of the air conditioner. The indoor unit 1
It is mounted on the inner wall 3a of the house in a wall-mounted manner, and has a grill-like indoor air intake port 5, an indoor filter 7 arranged inside the indoor air intake port 5, and heat disposed opposite the indoor air intake port 5. Exchanger 9, blower fan 11,
It has an air outlet 13 and a controller 15.

The indoor unit 1 controls the circulation of the heat medium to the heat exchanger 9 and the blowing operation of the blower fan 11 by the control unit 15, and the indoor air is blown by the blower fan 11 from the indoor air suction port 5 to the indoor filter 7. The air is sucked in through the heat exchanger 9, the air is sent to the front surface of the heat exchanger 9, and the air whose temperature is adjusted by passing the heat exchanger 9 back and forth is blown out into the room from the air outlet 13.

The indoor unit 1 has an outside air intake duct 1
7 are provided. The outside air intake duct 17 extends at one end from the back surface of the indoor unit 1 through the inner wall 3a and the outer wall 3b of the house, and has an outside air intake port 19 open to the outside at its tip. . The outside air intake duct 17 is bent at the other end located inside the indoor unit 1 into an L shape, and exchanges heat with the air flow between the indoor air intake port 5 and the air outlet port 13 of the indoor unit 1. An open end (outside air suction port) 21 is provided on the upstream side of the vessel 9, that is, on the front surface of the heat exchanger 9.

In the indoor unit 1 having the above-described structure, the outside air is introduced from the outside air intake 19 through the outside air intake duct 17 to the upstream side of the heat exchanger 9 by the blowing operation of the blower fan 11, and the outside air is sucked into the indoor air. It passes through the heat exchanger 9 together with the room air from the mouth 5, is temperature-controlled, and blows out into the room from the air outlet 13. As a result, it is possible to prevent the outside air from entering the room as it is, and suppress the fluctuation of the room temperature due to the introduction of the outside air.
In particular, cold draft is prevented in winter and indoor comfort in winter is improved.

The outside air intake duct 17 has an external extension portion 17a extending from the rear surface of the indoor unit 1 through the inner wall 3a and the outer wall 3b, and L in the indoor unit 1.
It may be configured by a separate member duct that can be connected to the bent portion 17b. In this case, the wall length of the house can be accommodated by the duct length of the external extension portion 17a. FIG. 3 shows a second embodiment of the air conditioner according to the present invention.
In FIG. 3, portions corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof will be omitted.

In this embodiment, a damper 23 arranged in the outside air intake duct 17 for controlling the flow rate of the outside air flowing through the outside air intake duct 17, a damper drive motor 25 for driving the damper 23 to open and close, and the outside air intake duct 1
7, a flow rate (flow rate) sensor 27 for measuring the flow rate of outside air (outside air velocity) flowing through the outside air intake duct 17 is provided.

The flow rate (velocity) sensor 27 outputs a measured value of the outside air flow rate (outside air velocity) flowing through the outside air intake duct 17 to the control unit 15, and the control unit 15 deviates from the measured value and the target value of the outside air flow rate. Is calculated and the deviation becomes zero,
That is, the opening degree of the damper 23 is quantitatively controlled by the drive control of the damper drive motor 25 so that the measured value matches the target value of the outside air flow rate.

The target value of the outside air flow rate is automatically set by a controller such as a remote operation unit (not shown) of the air conditioner, which is set by the user or in accordance with the air conditioning load. In this embodiment, the flow rate sensor 27 is used.
The opening degree of the damper 23 is controlled according to the outside air flow rate (outside air flow velocity) measured by, and the feedback control is performed so that the outside air flow rate reaches a predetermined target value.

As a result, the deterioration of the indoor air quality due to the shortage of the outside air introduction amount and the increase of the air conditioning load due to the excessive outside air introduction amount are prevented, and unnecessary energy consumption is avoided. Further, it is also possible to prevent the blown air temperature from becoming unadjustable and the room temperature to fluctuate due to the excessive amount of outside air introduced. In this embodiment also, the outside air is taken in by the outside air intake duct 17 to the heat exchanger 9
Since the air is introduced further upstream, as in the case of the first embodiment, it is possible to prevent the outside air from entering the room as it is, and suppress the fluctuation of the room temperature due to the introduction of the outside air.

FIG. 4 shows a third embodiment of the air conditioner according to the present invention. In FIG. 4, parts corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted. In this embodiment, an electric blower fan 29 for electric outside air introduction arranged in the outside air intake duct 17 and an outside air flow rate (outside air flow velocity) arranged in the outside air intake duct 17 and flowing through the outside air intake duct 17 are measured. A flow rate (flow velocity) sensor 31 is provided.

The flow rate (velocity) sensor 31 outputs a measured value of the outside air flow rate (outside air velocity) flowing through the outside air intake duct 17 to the control unit 15, and the control unit 15 deviates the measured value from the target value of the outside air flow rate. Is calculated and the deviation becomes zero,
That is, the rotation speed of the outside air introduction fan 29 is controlled so that the measured value matches the target value of the outside air flow rate. Again,
The target value of the outside air flow rate is set by a controller such as a remote operation unit (not shown) of the air conditioner, which is set by the user or automatically set according to the air conditioning load.

In this embodiment, a blower fan 2 for introducing outside air
9, the outside air is forcibly introduced from the outside air intake duct 17, and the outside air introduction amount is increased or decreased to an arbitrary value by controlling the rotation speed of the outside air introduction blower fan 29. Further, in the embodiment, the blower fan 29 for introducing the outside air according to the outside air flow rate (outside air flow rate) measured by the flow rate (flow rate) sensor 31.
Is controlled in a feedback compensation manner so that the outside air flow rate reaches a predetermined target value.

As a result, the deterioration of the indoor air quality due to the shortage of the outside air introduction amount and the increase of the air conditioning load due to the excessive outside air introduction amount are prevented, and unnecessary energy consumption is avoided. Further, it is also possible to prevent the blown air temperature from becoming unadjustable and the room temperature to fluctuate due to the excessive amount of outside air introduced. In this embodiment also, the outside air is taken in by the outside air intake duct 17 to the heat exchanger 9
Since the air is introduced further upstream, as in the case of the first embodiment, it is possible to prevent the outside air from entering the room as it is, and suppress the fluctuation of the room temperature due to the introduction of the outside air.

In the above-described embodiment, the separate type air conditioner in which the indoor unit and the outdoor unit are separately placed has been described, but the air conditioner according to the present invention has the indoor unit and the outdoor unit integrated with each other. It can also be applied to an air conditioner for windows.

[0023]

As can be understood from the above description, according to the air conditioner of the present invention, the outside air is introduced upstream of the heat exchanger, and the outside air is temperature-controlled in the same manner as the room air to blow out air. Since the air blows out more into the room, the indoor temperature does not fluctuate due to the introduction of outside air, and it is possible to avoid the cold draft, especially in the winter, and to improve the indoor comfort in the winter.

Further, the amount of introduced outside air can be set to an appropriate value by increasing or decreasing the amount of introduced outside air by the flow rate control means, or by increasing or decreasing the amount introduced by the blowing fan for introducing outside air, the amount of introduced outside air becomes insufficient. As a result, it is possible to prevent the indoor air quality from deteriorating, increase the air conditioning load due to an excessive amount of outside air introduced, and prevent the indoor air temperature from fluctuating due to inability to adjust the blown air temperature. Due to these, a comfortable indoor air-conditioning environment can be obtained and energy can be saved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an air conditioner according to the present invention.

FIG. 2 is a schematic configuration diagram showing a first embodiment of an air conditioner according to the present invention.

FIG. 3 is a perspective view showing a second embodiment of the air conditioner according to the present invention.

FIG. 4 is a perspective view showing a third embodiment of the air conditioner according to the present invention.

[Explanation of symbols]

 1 Indoor Unit 5 Indoor Air Intake Port 9 Heat Exchanger 11 Blower Fan 13 Air Outlet Port 15 Control Part 17 Outside Air Intake Duct 19 Outside Air Intake Port 21 Open End (Outside Air Intake Port) 23 Damper 25 Damper Drive Motor 27 Flow Rate Sensor 29 Blower fan for introducing outside air 31 Flow rate sensor

Claims (3)

[Claims] 1. An indoor air suction port, a heat exchanger, an air blowing port, and a blower fan. The blower fan sucks air from the indoor air suction port and blows out the air that has passed through the heat exchanger. An air conditioner blown into a room through a mouth is provided with an outside air intake duct for taking outside air into the room, one end of the outside air intake duct is opened to the outside of the room, and the other end is the indoor air intake port and the air outlet port. An air conditioner that is opened upstream of the heat exchanger as viewed by the flow of air between and and introduces outside air upstream of the heat exchanger. 2. The air according to claim 1, further comprising flow rate control means for controlling a flow rate of air flowing through the outside air intake duct by controlling an opening ratio of the outside air intake dust. Harmony device. 3. The outside air intake duct includes an outside air introduction fan, and flow rate control means for controlling the outside air introduction flow rate by controlling the outside air introduction fan. The air conditioner according to claim 1.