JPH0620023Y2 - Airflow control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an air outlet control device for an air conditioner.

(Prior Art) Generally, in an air conditioner, the higher the static pressure on the downstream side of the blower in the blower duct, the greater the blowing capacity required. On the other hand, when the negative pressure on the upstream side of the blower becomes high, the blowing capacity also decreases.

When the static pressure on the downstream side of the blower becomes high, for example, as shown in Japanese Utility Model Laid-Open No. 60-118427, a plurality of air outlets having different blowing directions are provided in the casing of the air conditioner main body. By providing a damper member that variably and variably adjusts the plurality of air outlets in a range from a fully closed state to a fully opened state, or by shielding the plurality of air outlets with a predetermined shielding plate according to the installation form. For example, there is a case where the blowing mode is arbitrarily set to one of four-side blowing, three-side blowing, and two-side blowing.

In these cases, the static pressure value in each duct on the outlet side greatly changes depending on the opening of the damper member and the set number of outlets, and assuming that the capacity of the blower is constant, as the static pressure value increases, The amount of air blown from the air outlet will inevitably decrease. Therefore, as a result, there is a problem that the air flow distribution in the room deteriorates.

Also, when the negative pressure value on the upstream side of the blower becomes high,
For example, there is a case where an electrostatic precipitator or a high-density air filter as an optional product is arbitrarily selected and attached to the air intake side of the air conditioner.

With such a configuration, the air precipitators and high-density air filters have different air flow resistances.
The suction resistance value of air varies considerably depending on which of them is selected and installed, and of course, the suction resistance value differs greatly when attached and not attached. . Therefore, assuming that the blower has a constant blowing capacity, the higher the air flow resistance, the higher the negative pressure value on the upstream side of the blower, and the lower the blown air volume and the poorer airflow distribution and dew or air conditioning capacity. That is, a problem that causes

Therefore, as a countermeasure against the above problems, conventionally, for example, a configuration is used in which the taps for varying the rotation speed of the blower motor are switched, or the blower motor itself is replaced according to the type of option to be installed. It had been.

(Problems to be solved by the invention) However, it is difficult for the conventional tap switching type countermeasure means as described above to control the fine air volume, and the motor replacement type countermeasure means cannot bear the complexity. .

(Means for Solving the Problems) The inventions of claims 1 to 4 of the present application have been made for the purpose of solving the above-mentioned problems, respectively.
As shown in FIG. 9 to FIG. 9, it is configured with the following characteristic problem solving means.

(1) Means for solving the problems of the first aspect of the invention A heat exchanger 5 provided at an air blow passage 11 between an air suction port 6 for sucking air and air blow ports 7a to 7d for blowing air. And an electric fan blower 4,
In an air conditioner configured to suck air from the air suction port 6 by the electric fan blower 4 and blow out conditioned air from the air outlets 7a to 7d through an air blowing path 11 in which the heat exchanger 5 is arranged. , The air blowing passage 11 extending from the air inlet 6 to the air outlets 7a to 7d
The electric fan blower 4 according to the change of the air circulation resistance of the
The electric fan control means 21 for controlling the number of revolutions is provided.

(2) A means for solving the problem of the second aspect of the invention A heat exchanger 5 provided in an air blowing passage 11 between an air suction port 6 for sucking air and air blowing ports 7A to 7d for blowing air. And an electric fan blower 4,
In an air conditioner configured to suck air from the air suction port 6 by the electric fan blower 4 and blow out conditioned air from the air outlets 7a to 7d through an air blowing path 11 in which the heat exchanger 5 is arranged. , The air blowing passage 11 extending from the air inlet 6 to the air outlets 7a to 7d
Air flow resistance detecting means 30 for detecting a change in the air flow resistance of the electric fan, and an electric fan for controlling the rotation speed of the electric fan blower 4 according to the value of the air flow resistance detected by the air flow resistance detecting means 30. The control means 21 is provided.

(3) Problem solving means of the third aspect of the invention The problem solving means of the third aspect of the invention is the above first aspect of the invention.
Alternatively, the electric fan control means 21 in the problem solving means of the second invention is constituted by a phase control means for variably controlling the drive phase of the electric fan motor.

(4) Problem solving means of the fourth aspect of the invention The problem solving means of the fourth aspect of the invention is the above-mentioned third aspect of the invention.
The phase control means in the problem-solving means of the invention is configured by including a connector device having a plurality of phase control constant setting means.

(Operation) First, in the air outlet control device for an air conditioner according to the first aspect of the present invention, the rotation speed of the blower electric fan is automatically changed according to the change in the air flow resistance of the air blow passage of the air conditioner. Controlled. Therefore, if there is a situation in which the air flow resistance is changed, the characteristics of the air filter are changed, or the air flow resistance is changed due to attachment of a dust collector, the blown air amount of the blower itself can be changed accordingly.

Therefore, it is possible to always maintain a stable air flow,
It becomes possible to realize an appropriate airflow distribution state.

Further, in the blowout flow control device of the air conditioner according to the second aspect of the present invention, the change in the air flow resistance of the air blowing path is automatically and specifically detected by the air flow resistance detecting means. .

Therefore, according to this apparatus, the air blowout flow control function of the first aspect of the invention can be controlled automatically and highly accurately in response to a finer and continuous change, which is far more appropriate. It becomes possible to adjust the air flow rate.

Further, in the air blowout flow control device for the air conditioner according to the third aspect of the present invention, the electric fan control means is constituted by the phase control means for adjusting the drive voltage phase of the fan motor. It can be controlled efficiently.

Furthermore, in the airflow control device for an air conditioner according to the fourth aspect of the present invention, since the phase control means comprises a connector having a plurality of phase control constant setting means,
The rotation speed control function described above can be easily realized at low cost.

(Effects of the Invention) As described above, according to the first to fourth inventions of the present application, the air circulation resistance of the air conditioner air duct such as the change of the air blowing mode and the replacement of the air filter and the dust collector can be improved. Even when it is accompanied, it is possible to always realize a stable blown air volume, and it is possible to stabilize the air flow distribution and maintain a high air conditioning capacity.

(Embodiment) First, a first embodiment of the present invention will be described below.

In the first embodiment, a ceiling-suspended air conditioner is adopted as an air conditioner, and at least four air outlets formed on four sides of the air conditioner are arbitrarily provided by a shielding plate that can be fitted into the air outlets. It is a case where it is applied to the one in which each of the air blowing modes of 1 direction to 2 directions to 3 directions to 4 directions can be realized by shielding the air.

In the drawings, first, reference numeral 1 is a ceiling-mounted (or ceiling-suspended) type air conditioner main body, and the air conditioner main body 1 is a box-shaped casing 3 buried in a ceiling 2 and a center of the casing 3. A blower 4 vertically installed on the upper wall 3a of the unit, a heat exchanger 5 arranged around the blower 4, an air suction port 6 formed on the lower surface of the central portion of the casing 3, and an air suction unit. Four sets of air outlets 7a to 7d formed at four outer peripheral sides of the mouth 6
A long-life filter (high-density filter) 10 mounted by fitting in the filter fitting recess 8 of the air suction port 6, and the air suction port 6 through the blower 4 and the heat exchanger 5. It is composed of the air passage 11 reaching the air outlets 7a to 7d.

The blower 4 is composed of a centrifugal fan 4A located between the air suction port 6 and the heat exchanger 5 for blowing air in the arrow direction, and a fan motor 4B for rotationally driving the centrifugal fan 4A. .

Further, the air intake port 6 and the air outlets 7a to 7d are
As shown in FIG. 2, the panel cover 12 is detachably mounted on the lower surface side of the air conditioner main body casing 3, and each of the openings 7a to 7d has a predetermined shape as shown. A shield plate 13 is used to shield the surface as needed.

The shielding is provided in the room 20 as shown in FIGS.
This is done for the purpose of setting the wind blowing direction to be optimum according to the installation form inside. As a result, for example, as shown in FIG.
Installed in the central portion of the first to fourth air outlets 7a to 7
5 to 7 and a state in which air is blown out from both d.
As shown in the figure, either one or two sets of air outlets are shield plates 1.
When the blowing direction of the air is limited to 3 or 2 by being shielded by 3, the downstream cross-sectional area of the blower passage 11 inevitably changes. As a result, the amount of blown air becomes different between the case of FIG. 4 and the cases of FIGS. 5, 6, and 7, and the rotation of the fan motor 4B that regulates the blowing capacity of the blower 4 is rotated. Assuming that the numbers are the same, in comparison with the case of FIG. 4, in the cases of FIG. 5, FIG. 6 and FIG. 7, the air flow rate gradually decreases and the air flow distribution deteriorates.

Therefore, in this embodiment, for example, as shown in FIG. 8, a wind speed sensor 30 is provided at the air outlet, and the phase control means 21 is operated according to the output of the wind speed sensor 30 to rotate the fan motor 4B of the blower 4. By controlling the number in the ascending direction, it is configured to prevent a decrease in the air flow rate. As a result, it is possible to control the increase of the blown air amount corresponding to the blowing mode, and it is possible to always realize a stable airflow state.

In the configuration of the first embodiment, the air velocity sensor 30 is provided at the air outlet, and the rotation speed of the fan motor is increased after detecting the actual decrease in the air volume at each air outlet. However, this is, for example, the ninth embodiment.
As shown in the figure, by using the tap switching connectors 26 and 27, the phase control constant of the phase control means 21 may be fixedly set for each of the blowing modes of FIGS. 4 to 7. .

That is, among the tap switching connectors 26, 27, the receiving side connector 27 is provided with a four-way connector 27a corresponding to the blowout form of FIG. 4 and a three-way connector 27b corresponding to the blowout form of FIG. , And three types of control constant setting connectors, which are two-way connectors 27c corresponding to the blowing modes of FIGS. 6 and 7, are provided. By inserting and connecting one of the pin insertion side connectors 26 to any one of the blowout modes, it is possible to control the fan motor rotation speed set in advance. To the receiving side connector 27, a control constant setting circuit 28 for setting a control constant corresponding to the above-mentioned blowing mode is connected.

Further, although not particularly shown, the taps may be switched by using a rotary switch or a slide switch configuration instead of the connector system as described above.

Furthermore, although the long-life filter 10 is installed in the air suction port 6 in the above-mentioned embodiment, recently, an electrostatic precipitator can be optionally attached to this portion. Therefore, even in such a case, the flow resistance of the air passage extending from the air suction port 6 to the air outlets 7a to 7d greatly changes.

Therefore, also in this case, if the rotation speed of the fan motor 4B is controlled and the air flow rate is appropriately controlled in the same manner as in the above case, a stable air flow distribution can always be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an air outlet control device for an air conditioner according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the same portion, and FIG. FIG. 4 to FIG. 7 are external perspective views of the air conditioner body in the example, FIG. 4 to FIG. 7 are airflow blowing mode diagrams according to various installation forms of the air conditioner, and FIG. Sectional view showing an outlet flow control system,
FIG. 9 is a cross-sectional view showing the configuration of the blowout flow control device of the air conditioner according to the second embodiment of the present invention. 1 ... Air conditioner main body 2 ... Ceiling 3 ... Casing 4 ... Blower 4A ... Centrifugal fan 4B ... Fan motor 5 ... Heat exchanger 6 ... Air inlet 7a ... First air outlet 7b ... Second air outlet 7c ... Third air outlet 7d ... Fourth air outlet 10 ... Long life filter 21 ... Phase control means 26 ... Insertion side connector 27 ... Reception Side connector 30 ... Wind speed sensor

Claims (4)

[Scope of utility model registration request] 1. An air blow passage (11) between an air suction port (6) for sucking air and air blow ports (7a) to (7d) for blowing air.
A heat exchanger (5) and an electric fan blower (4) provided at a position, wherein the electric fan blower (4) sucks air from the air suction port (6) and the heat exchanger (5). In the air conditioner configured to blow out conditioned air from the air outlets (7a to 7d) via the air blow passage (11) in which the air blow passages (11) are arranged, the air inlets (6) to the air outlets (7a) to An electric fan control means (21) for controlling the rotation speed of the electric fan blower (4) according to a change in the air flow resistance of the air blow passage (11) reaching (7d) is provided. Airflow control device for air conditioner. 2. An air blowing path (11) between an air inlet (6) for sucking air and air outlets (7a)-(7d) for blowing air.
A heat exchanger (5) and an electric fan blower (4) provided at a position, wherein the electric fan blower (4) sucks air from the air suction port (6) and the heat exchanger (5). In the air conditioner configured to blow out conditioned air from the air outlets (7a to 7d) via the air blow passage (11) in which the air blow passages (11) are arranged, the air inlets (6) to the air outlets (7a) to Air circulation resistance detection means (30) for detecting a change in the air circulation resistance of the air blow passage (11) reaching (7d), and the air circulation resistance detection means
(30) An electric fan control means (21) for controlling the number of revolutions of the electric fan blower (4) according to the value of the air circulation resistance detected by the electric fan control means (21). Flow control device. 3. The blowout control of the air conditioner according to claim 1 or 2, wherein the electric fan control means comprises a phase control means for variably controlling the drive phase of the electric fan motor. apparatus. 4. The blowout flow control device for an air conditioner according to claim 1 or 2, wherein the phase control means comprises a connector device having a plurality of phase control constant setting means.