JPH04251131A - Air volume control device for air conditioner - Google Patents

Abstract

PURPOSE:To provide an air volume control device for an air conditioner in which a loss of blown air caused by a duct in particular is compensated and a set air volume is always supplied to a heat exchanger. CONSTITUTION:A duct 16 is connected between a heat exchanger 11 and a blower 12 as required and then a controller 18 is provided so as to control the number of rotations of the blower 18 in response to a presence or a non- presence of the duct 16 or a duct length. Even if an air blowing port is spaced apart, air of specified amount is always supplied to the heat exchanger and then a required air conditioning capability can be assured.

Description

[Detailed description of the invention]

[Purpose of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an air volume control device for an air conditioner.

0002

2. Description of the Related Art Conventionally, a split type air conditioner is constructed by combining an indoor unit and an outdoor unit, and the indoor unit incorporates a heat exchanger and a blower for blowing air to the heat exchanger. As shown in FIG. 5, in a conventional indoor unit 1 of an air conditioner, a heat exchanger 11 and a blower 12 are housed in a single casing 13, and an air intake port 14 and a They are attached to the ceiling 2, side walls, etc. with the air outlets 15 facing indoors. Therefore, in the conventional indoor unit 1, when it is necessary to move the air outlet 15 away from the installation position depending on the indoor air conditioning conditions, the heat exchanger 11
A duct 16 is connected between the air outlet and the air outlet 14 to blow air. However, when the duct 16 becomes long, the heat exchanger 11 and the blower 12 themselves are
7, the heat-exchanged air suffers heat loss in the duct 16 and resistance to the wind flow, even though it is operated at the original set air conditioning capacity, so the length of the air conditioning period was extended. There is a drawback that the required capacity of cooling/heating air is not supplied from the air outlet 15, and an improvement has been desired.

0003

[Problems to be solved by the invention] Conventional air conditioners are
If there is a distance between the installation position of the indoor unit and the actual air outlet, there is a drawback that the air conditioning effect is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air volume control device for an air conditioner that can eliminate the above-mentioned conventional drawbacks and maintain the air conditioning effect even if the installation conditions vary depending on the location.

[Configuration of the invention]

[0006]

[Means for Solving the Problems] An air volume control device for an air conditioner according to a first invention includes a heat exchanger, an air blower that blows air toward the heat exchanger, and an air flow between the air blower and the heat exchanger. It is characterized by comprising a duct that is selectively connected and a controller that controls the rotation speed of the blower depending on the presence or absence of the duct.

[0007] The second invention is an air volume control device for an air conditioner, which includes a heat exchanger, a blower that blows air to the heat exchanger through a duct, and a rotation speed of the blower that corresponds to the length of the duct. and a controller for controlling.

[0008]

[Operation] The air volume control device for an air conditioner according to the present invention has the following features:
If it becomes necessary to change the length to the air outlet,
A duct is interposed between the heat exchanger and the blower, and the length of the interposed duct is adjustable, and the rotation speed of the blower can be switched or changed according to the installation conditions of the duct. Configured to control. Therefore, as the distance to the air outlet increases, the distance between the blower and the heat exchanger also increases, but the rotational speed of the blower can be increased to compensate for the reduction in air volume due to the duct between them.

[0009] Therefore, the heat exchanger is located close to the air outlet, and regardless of the presence or absence of a duct or its length, it performs a heat exchange action while receiving an air volume that matches the air conditioning control level, thereby preventing a decrease in air conditioning capacity. is avoided.

Further, in the present invention, when the distance from the blower to the heat exchanger changes, the controller controls the rotation speed of the blower to be changed stepwise or continuously in response to the change in length. Therefore, even if the length of the duct changes, the air volume is automatically adjusted to maintain the set air conditioning capacity.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an air volume control device for an air conditioner according to the present invention will be described with reference to FIGS. 1 to 4. Note that the same components as those of the conventional device shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, FIGS. 1(a) and 1(b) are block diagrams showing one embodiment of an air volume control device for an air conditioner according to the present invention. The split type air conditioner is divided into an indoor unit 1 and an outdoor unit, and the indoor unit 1 includes a heat exchanger 11 and a blower 12 that blows air to the heat exchanger 11 in a casing 13. If it becomes necessary to install the casing 13 with the air outlet 15 separated from the blower 12 and the air intake 14, the air outlet 15 and the heat exchanger 11 can be integrated into the blower as shown in FIG. 12 and connected therebetween by a duct 16. The duct 16 has a certain length L, and a sensor 18 consisting of a contact type microswitch detects the presence or absence of a connection between the casing 13a on the heat exchanger 11 side and the casing 13b on the blower 12 side. Supply to 17.

The controller 17 is composed of a microcomputer, and is configured to switch and control the rotation speed of the motor of the blower 12 based on information from the sensor 18 as to whether or not the duct 16 is connected. That is, when the duct 16 is connected, the rotation speed of the blower 12 is increased to compensate for the loss of air due to the duct 16, and the set air volume is supplied to the heat exchanger 11.

[0014] Furthermore, in the air conditioner, the air outlet 15
It may be desired to arbitrarily change the distance to the end depending on the installation conditions. In that case, it can be realized, for example, by constructing a telescopic bellows-type duct.

FIG. 2 shows a second embodiment of the air volume control device for an air conditioner according to this invention, in which the length of the duct 16 can be selected according to the installation conditions, and the connection is configured in a bellows type. Indicates the state in which In that case, as shown in FIG. 3, the controller 17 receives a setting indicating that the duct length, for example, any one of L1<L2<L3, has been selected and installed by operating the duct length setting switch 19. Now, if the length of the duct 16 is selected and installed as L2, and the duct length setting switch 19 is operated to select L2, the air conditioning capacity is set to "strong" or "high" by the changeover switch 3a of the remote control device 3. When switching control is performed between "weak" and "fine", the rotational speed (x, y, z) of the blower 12 is switched to x2, y2, z2 to ensure a predetermined air conditioning capacity.

[0016] Note that the rotational speed x, y corresponding to each air conditioning capacity
, z correspond to the duct lengths L1, L2, and L3, respectively, so in the combination shown in FIG. 4, x1<x2<x3, y1, respectively.
<y2<y3, z1<z2<z3, and control is performed so that the necessary air volume is supplied to the heat exchanger 11.

[0017]

[Effects of the Invention] The air volume control device for an air conditioner according to the present invention ensures a predetermined air conditioning capacity by controlling the air volume even when the heat exchanger is installed through a duct away from the installation position of the blower. It can be used for home use as well as for home use.
Remarkable effects can be obtained when applied to commercial air conditioning equipment.

[Brief explanation of the drawing]

FIG. 1(a) is a configuration diagram showing a first embodiment of an air volume control device for an air conditioner according to the present invention, and FIG. 1(b) shows a state in which a duct is connected in FIG. 1(a). FIG.

FIG. 2 is a configuration diagram showing a second embodiment of an air volume control device for an air conditioner according to the present invention.

FIG. 3 is a system diagram showing a control system of the controller in FIG. 2;

FIG. 4 is a diagram showing a combination of blower rotation speeds corresponding to duct lengths of the device in FIG. 2;

FIG. 5 is a configuration diagram showing a conventional air conditioner.

[Explanation of symbols]

1...Indoor unit 11...Heat exchanger 12...Blower 13, 13a, 13b...Casing 14...Air intake 15...Air outlet 16...Duct 17...Controller 18...Sensor 19...Duct length setting switch 2...Ceiling 3...Remote control device

Claims (2)

[Claims] Claim 1: A heat exchanger, a blower that blows air toward the heat exchanger, a duct selectively connected between the blower and the heat exchanger, and a blower that corresponds to the presence or absence of the duct. An air volume control device for an air conditioner, comprising: a controller for controlling the rotation speed of the air conditioner. 2. A heat exchanger, a blower that blows air to the heat exchanger through a duct, and a controller that controls the rotation speed of the blower in accordance with the length of the duct. Air volume control device for air conditioners.