JPS637280B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air blower that promotes the outdoor heat exchange capacity of an air conditioner.

Conventional configurations and their problems In general, in order to control the air volume of an air conditioner, it is necessary to control the capacity by increasing the outdoor air volume when the load is high due to changes in outside air temperature, and decreasing the outdoor air volume when the load is low.

For this reason, conventionally, in order to switch the air volume of an outdoor fan, an outdoor temperature sensing device such as a thermistor or pressure sensor to sense the outside air temperature and an outdoor fan switching device are required, which increases the number of parts and assembly man-hours, and costs. However, the control circuit for the control circuit is also complicated.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
It has a simple structure, reduces assembly man-hours and the number of parts, and aims to reduce manufacturing costs and enable the outdoor air volume of an air conditioner to be controlled based on changes in outside air temperature.

Structure of the Invention In order to achieve this object, the present invention consists of an air guider on the outdoor side made of a shape memory alloy whose shape changes, and a ventilation hole concentric with the axis of the propeller fan that changes in the radial direction depending on the ventilation temperature. It is configured to be stored. With this configuration, the shape of the air guider is changed in response to changes in outside air temperature, and the air blowing characteristics are changed to control the air volume.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 of the accompanying drawings.

In Fig. 1, 1 is the outdoor unit main body of a separate air conditioner, including an air guider 2 made of a well-known shape memory metal material, a propeller fan 3, and a heat exchanger 4.
etc. FIG. 5 shows the positional relationship among the air guider 2, propeller fan 3, and fan motor 5. It is known that, when the shape of the fan 3 and the rotational speed of the fan are constant, the dimensions indicated by S, t, and u generally have a large influence as factors that determine an increase or decrease in air volume.

Figure 6 is a diagram showing the characteristics of shape memory alloy metals, and it is generally known that the shape changes at the transformation temperatures t ₁ and t ₂ and that it restores its memorized shape at low and high temperatures respectively. It is being The present invention also utilizes this effect. The air guider 2 made of a shape memory alloy used here memorizes different shapes on the low-temperature side and the high-temperature side of the transformation temperature.

FIGS. 2 to 4 show changes in shape of an air guider made of a shape memory alloy at low temperatures and at high temperatures, respectively.

First, Figure 2 shows the air guider 2 made of shape memory alloy.
The inner diameter of the air guider 2 surrounding the propeller fan 3 contracts as shown by b and c in the figure when the outside air temperature rises and the load becomes high. As a result, the t dimension shown in FIG. 5 decreases, the air volume increases, and the heat exchange capacity also increases.

Next, FIG. 3 shows a shape change memorized in the edge 2a of the air guider 2. When the outside temperature rises and the load becomes high, the edge 2a of the air guider 2 contracts in the radial direction as shown by c in the figure. As a result, the t dimension shown in FIG. 5 decreases, and the air volume and capacity increase.

In addition, Fig. 4 shows the shape change in the axial direction of the fan motor 5 memorized on the edge 2a of the air guider 2, and when the outside temperature rises and the load becomes high, the edge 2a of the air guider 2 bends outward. It extends in the axial direction of the fan motor 5 as shown by the arrow. As a result, the s dimension shown in FIG. 5 decreases, and the air volume and capacity increase. On the other hand, when the outside air temperature falls and the load is low, the opposite shape change occurs, allowing stable control of the outdoor air volume.

Effects of the Invention The present invention makes it possible to control the air volume according to changes in outside air temperature by forming the air guider of the fan on the outdoor side with shape memory metal. It is possible to omit the outdoor temperature sensing device such as a thermistor or pressure sensor and the outdoor fan switching device that were required to change the air volume of the outdoor fan depending on the situation, resulting in a significant reduction in the number of parts and assembly man-hours. In addition to reducing costs, rapid changes in shape occur at the transformation temperature,
The response is as good as when detecting the situation with a thermistor, and it is also easy to process when making an air guider. Furthermore, since the ventilation holes of the air guider are configured to contract in the radial direction, the characteristics of the fan itself are constant, and the fan has various advantages such as stability and reproducibility of the characteristics.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an air conditioner equipped with an air blower according to an embodiment of the present invention, and FIGS. 2 a to 2 d are a side view and a front view of the air conditioner at high outside temperature, A side view and a front view when the outside temperature is low, and FIGS. 4A to 4D are a side view and a front view of an air blower according to another embodiment of the present invention when the outside temperature is high, and a side view and a front view when the outside temperature is low; FIG. 5 shows a fan, a fan motor, Explanatory diagram showing the positional relationship of air guiders, No. 6
The figure is a characteristic curve diagram showing the relationship between temperature and deformation amount of a shape memory alloy. 1...Outdoor unit body, 2...Air guider, 3...
...Propeller fan, 4...Heat exchanger, 5...Fan motor.

Claims (1)

[Claims] 1. An air guider with ventilation holes concentric with the axis of the propeller fan is installed on the outdoor side of the air conditioner,
A blower device for an air conditioner, in which the air guider is made of a shape memory alloy material whose shape changes, and the ventilation holes are configured to contract in the radial direction depending on the ventilation temperature.