JPH04306443A - Local air conditioner - Google Patents

Abstract

PURPOSE:To accommodate an amount of blowing of cold air or hot air and an air conditioning capability by measuring either a distance between a local air conditioner and an air blown item or a surrounding air temperature, to expand a comfortable spacing and keep a temperature of discharging air constant. CONSTITUTION:A local air conditioner 1 is provided with a sensor 3 comprised of a horn and an ultrasonic receiving element for sensing a distance between a discharging port duct 2 for cooling an air blown item as well as heating it. Operation of a blower and a compressor are controlled through an invertor in response to the detected distance and an amount of blowing cold air or heated air and an air conditioning capability. Therefore, it is possible to eliminate a useless operation, give a uniform air blowing state of the air blown item and to improve a comfortable state.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local air conditioner that automatically adjusts air flow and conditioning capacity.

0002

[Prior Art] Conventional local air conditioners blow air from the outlet only at a preset air conditioning capacity and air flow rate, but if you are near the outlet, the wind is too strong. When you move away from the air outlet, the wind no longer reaches you, limiting the number of comfortable places you can go.

0003

Problems to be Solved by the Invention In the prior art, there is a problem in that when the object to which cold or hot air is blown, such as a person, moves frequently, there is a limited space in which the object can be comfortable. In addition, the cold or warm air was simply blown out after adding a temperature difference to the suction air from the condenser or evaporator that was commensurate with the air conditioning capacity. The temperature of the blowing air also increases.
It has descended.

[0004] The present invention aims to expand the space in which the air blown out from an air conditioner feels comfortable, and to maintain the blown air temperature constant by automatically changing the temperature difference applied to the intake air. .

[0005]

[Means for Solving the Problems] The present invention has been made to achieve the above object, and the amount of cold air or hot air blown and the air conditioning capacity can be adjusted based on the distance between the local air conditioner and the object to be blown, or the surrounding area. The gist is to measure the air temperature and automatically change it accordingly.

[0006]

[Operation] The distance between the local air conditioner and the object to be blown is measured by the distance detecting means, and the preset capacity and the amount of air blown are determined from the distance by the determining means. Similarly, the determination means determines the preset capacity and air flow rate based on the temperature measured by the ambient temperature detection means. The capacity and the amount of air blown are controlled by controlling the compressor and the electric motor for the blower, respectively, to change the capacity and the amount of air blown.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the illustrated embodiments. As shown in the figure, a local air conditioner (hereinafter referred to as a spot air conditioner) 1 is used to cool or heat an object to be blown (a person, an object, a wall, etc.; in this example, it is assumed to be a person, hereinafter referred to as a person). An air outlet duct 2 is attached for this purpose. A sensor 3 serving as distance detection means between a person and the spot air conditioner 1 is fixed to the outlet duct 2.

The sensor 3 is composed of a trumpet-shaped horn 4 and an ultrasonic receiving element 5, as shown in detail in FIG. 2, but an infrared sensor or the like may also be used. In order to measure the distance using this sensor 3, the distance is time-divided as shown in FIG.
is secured in the memory section of a microcomputer (hereinafter referred to as CPU). Here, an ultrasonic wave is emitted, the memory divided from the time of emission is incremented by time, the signal from the wave receiving element is stored in the memory, and this process is repeated. Since the distance is associated with the distance in advance, the distance can be detected based on the position of the received signal in the memory. The inverter 7 is controlled in accordance with this distance, and the blower 8 and compressor 9 are operated.

[0009]

[Effects of the Invention] The present invention measures the distance between the local air conditioner and the object to be blown, or the ambient air temperature, and automatically changes the amount of cold or hot air blown and the air conditioning capacity in accordance with the distance between the local air conditioner and the object to be blown. This eliminates unnecessary operation of spot air conditioners, resulting in energy savings. Also,
Even when the distance between the object to be blown and the air conditioner changes frequently, there are advantages such as being able to provide a uniform air blowing state to the object to be blown and improving comfort.

[Brief explanation of drawings]

FIG. 1 is a control system diagram of a local air conditioner according to the present invention.

FIG. 2 is a detailed explanatory diagram of a sensor.

FIG. 3 is a concrete diagram of a time-sharing CPU internal memory.

FIG. 4 is an external perspective view of a local air conditioner to which an embodiment of the present invention is applied.

[Explanation of symbols]

1 Local air conditioner (spot air conditioner) 2 Air outlet duct 3 Sensor 4 Horn 5 Ultrasonic receiving element 6 Memory 7 Inverter 8 Blower 9 Compressor

Claims (2)

[Claims] Claim 1: In a local air conditioner that incorporates various equipment necessary for the air conditioner and is equipped with a hot air or cold air outlet, there is a connection between the object to which cold air or hot air is blown and the local air conditioner. A local air conditioner characterized by measuring distance and automatically changing the strength of air blowing and the strength of the air conditioner in accordance with the distance. Claim 2: In a local air conditioner that incorporates various equipment necessary for the air conditioner and is equipped with a hot air or cold air outlet, there is a connection between the object to which cold air or hot air is blown and the local air conditioner. Measures the distance and automatically changes the strength of the air blower and the strength of the air conditioner according to the distance, as well as measures the ambient air temperature and humidity, and adjusts the strength of the air blower and air conditioner function accordingly. A local air conditioner that automatically changes and controls the outlet temperature to maintain it at a preset temperature.