JP4132941B2 - Wind air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a window air conditioner used by being attached to a window.
[0002]
[Prior art]
Conventionally, this type of equipment does not require large-scale installation work like a separate air conditioner installed on the wall of the room, can be easily installed by the user himself, and is easy to handle. Also for air conditioning control, a compressor with a fixed capacity is used, and the air conditioning operation is turned ON / OFF depending on the deviation between the set room temperature and the detected room temperature, that is, the compressor and the outdoor fan that perform the air conditioning operation are stopped, and only the indoor fan is By continuously driving and adjusting the room temperature, any attempt was made to provide inexpensively without using complicated circuits and elements.
[0003]
[Problems to be solved by the invention]
By the way, in this conventional type, a separate air conditioner accommodates a condenser, a compressor, and an outdoor fan provided in an outdoor unit installed outdoors, and the window air conditioner itself is fixed to the window frame. However, since it cannot be firmly fixed, a large vibration sound is generated each time the air-conditioning operation is turned ON / OFF, which gives the user a sense of discomfort or distrust.
[0004]
[Means for Solving the Problems]
The present invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the structure is provided with an evaporator, a compressor, a condenser, a throttle mechanism, an indoor fan, and an outdoor fan in one frame, and is provided in a window of the room. In a wind air conditioner that is fixed and performs indoor air conditioning, the air conditioning is controlled by ON / OFF of the air conditioning operation based on a deviation between a detected room temperature detected by a room temperature sensor and a set room temperature, and avoidance of avoiding the air conditioning operation OFF. The avoiding means includes a bypass passage that bypasses the throttle mechanism and an open / close switching valve provided in the bypass passage .
[0005]
As a result, when the detected room temperature approaches the temperature at which the air-conditioning operation is turned off, the open / close switching valve opens to allow the refrigerant to flow through the bypass passage or to widen the opening of the variable expansion valve, thereby fixing the compressor with a constant capacity. The air conditioning capability is reduced even when using the air conditioner, and the air conditioning operation can be avoided from being turned off. It is possible to provide a wind air conditioner that has no sound and does not give the user a sense of discomfort or distrust.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, a window air conditioner according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a base, on which a machine room 4 for storing a compressor 2, an electrical component 3, and the like is provided.
Reference numeral 5 denotes a frame body provided with an indoor suction port 6 and an indoor air outlet 7 on the front surface. The machine room 4 in the frame body 5 is partitioned by a central partition wall 8 into an indoor side and an outdoor side. An indoor heat exchanger 9 and an indoor fan 10 that constitute an evaporator are provided, and an outdoor heat exchanger 11 and an outdoor fan 12 and the like that constitute a condenser are provided on the outdoor side.
[0007]
An outdoor air inlet 13 is provided behind the outdoor heat exchanger 11, and an outdoor air outlet 14 is provided next to the outdoor air inlet 13.
The indoor air inlet 6, the indoor heat exchanger 9, the indoor fan 10, and the indoor air outlet 7 communicate with each other through the indoor air passage 15, and the outdoor air inlet 13, the outdoor heat exchanger 11, the outdoor fan 12, and the outdoor air outlet 14. Are connected to each other to form an outdoor ventilation path 16.
[0008]
Reference numeral 17 denotes a control unit composed of a microcomputer. A room temperature sensor comprising an operation switch 18 and a room temperature setting switch 19 for setting a desired set room temperature on the input side, and a thermistor provided in the indoor suction port 6 for detecting the current room temperature. 20 is connected.
[0009]
Further, the compressor 2, the indoor fan 10, and the outdoor fan 12 are connected to the output side of the control unit 17, and the compressor 2 and the outdoor fan 12 are ON / OFF controlled by the deviation between the set temperature and the detected room temperature, Is maintained at the set temperature, and the indoor fan 10 is continuously driven at this time.
[0010]
As shown in the piping diagram of FIG. 4, 21 is an output of the bypass unit 23 that bypasses the throttle mechanism 22 provided in the middle of the piping connecting the outdoor heat exchanger 11 and the indoor heat exchanger 9, and the output of the control unit 17. An avoiding means constituted by an open / close switching valve 24 for opening and closing the bypass passage 23, the open / close switching valve 24 is opened and throttled before the compressor 2 and the outdoor fan 12 turn off the air conditioning operation due to deviation. By forming a refrigerant that bypasses the mechanism 22, the ability is reduced and the air-conditioning operation is prevented from being turned off.
[0011]
Reference numeral 25 denotes a mounting frame for attaching the window air conditioner to the window frame 26, 27 denotes a glass door, and 28 denotes an operation unit provided on the front surface of the outer frame 5, which includes an operation switch 18, a room temperature setting switch 19, and the like. And a display unit 29 for displaying the contents of the abnormality.
[0012]
Next, the operation of the embodiment of the present invention will be described. When the operation switch 18 is pressed, the automatic cooling operation is automatically started, and the gas refrigerant compressed to high pressure by the compressor 2 The heat exchanger 11 radiates heat by exchanging heat with outdoor air blown from the outdoor fan 12, and the liquefied refrigerant is further depressurized through the throttle mechanism 22 and blown from the indoor fan 10 by the indoor heat exchanger 9. The indoor air is deprived of heat and vaporized to lower the temperature of the indoor air, and the gaseous refrigerant goes to the compressor 2 again and sequentially repeats this to cool the room.
[0013]
Further, the room temperature sensor 20 detects the room temperature to be cooled, and compares the detected room temperature t with a desired set room temperature T set by the room temperature setting switch 19 by the control unit 17, and the deviation is here T−t = When -1 degree C is reached, the compressor 2 and the outdoor fan 12 are stopped to turn off the air conditioning operation, and when the deviation is +0.5 degree C, the compressor 2 and the outdoor fan 12 are started again to turn on the air conditioning operation. The room temperature is maintained at the set room temperature.
[0014]
However, in the above control, since the vibration noise at the time of ON / OFF of the air conditioning operation is intense, in the present invention, when the deviation reaches −0.5 degrees C, the control unit 17 opens the open / close switching valve 24 of the avoiding means 21. Then, a part of the refrigerant flowing to the throttle mechanism 22 flows through the bypass passage 23 and remains in a non-depressurized state, so that the cooling capacity is reduced by that amount. Thus, generation of vibration sound due to ON / OFF can be surely prevented.
[0015]
Therefore, while maintaining the superiority of an easy-to-use and inexpensive wind air conditioner, it is possible to prevent only the problem of vibration noise, which was a problem, with an extremely simple configuration, ensuring a sense of discomfort and distrust of the user. It can be wiped away.
[0016]
Next, in FIG. 5 showing another embodiment, the same parts are denoted by the same reference numerals, and only the differences will be described. The avoiding means is constituted by the variable expansion valve 30. According to this, the deviation is air-conditioned. Since the capacity control is performed by controlling the flow rate of the refrigerant as it approaches the OFF temperature of the operation, it has an effect that only OFF can be reliably prevented while performing air conditioning.
[0017]
【The invention's effect】
As described above, according to the present invention, even if a compressor with a constant capacity is used, the air-conditioning capacity is lowered and the air-conditioning operation can be avoided . It is possible to prevent only the problem of vibration noise, which was a problem, while maintaining the above, and it is easy to handle and inexpensive, but there is no vibration sound, and it does not give the user a sense of discomfort or distrust. An air conditioner can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a wind air conditioner attached to a window according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the same.
FIG. 3 is a block diagram of the electric circuit.
FIG. 4 is a simplified piping diagram.
FIG. 5 is a schematic piping diagram showing another embodiment.
2 Compressor 5 Frame 9 Indoor heat exchanger 10 Indoor fan 11 Outdoor heat exchanger 12 Outdoor fan 20 Room temperature sensor 21 Avoiding means 22 Throttle mechanism 23 Bypass path 24 Open / close switching valve 30 Variable expansion valve

Claims (1)

In a wind air conditioner that includes an evaporator, a compressor, a condenser, a throttle mechanism, an indoor fan, and an outdoor fan in a single frame and is fixed to a room window for air conditioning, the air conditioning is performed at room temperature. The air conditioning operation is controlled by ON / OFF based on the deviation between the detected room temperature detected by the sensor and the set room temperature, and an avoiding means for avoiding the air conditioning operation OFF is provided . The avoiding means includes a bypass path for bypassing the throttle mechanism, and the bypass Wind air conditioner characterized by comprising an open / close switching valve provided on the road .

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