JPH07324848A - Defrosting device for air conditioner - Google Patents

Abstract

PURPOSE:To provide a defrosting device for an air conditioner in which a heating capacity can be increased by preventing the frosting of an outdoor heat exchanger in the case of heating by the conditioner. CONSTITUTION:At the time of heating, a compressor 4 is controlled at its operating frequency when the temperature detected by an outdoor side heat exchanger temperature sensor 19 falls within a set value range to bring it into coincidence with the natural frequency of the outdoor side heat exchanger 6 to vibrate the exchanger 6, thereby dropping condensation liquid water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrosting operation device for a heat pump type air conditioner equipped with an inverter compressor.

[0002]

2. Description of the Related Art In recent years, heat pump type air conditioners have been required to improve heating capacity by reducing and reducing defrosting operation against frost on the outdoor heat exchanger during heating operation. Further, air conditioners, which are products for improving comfort, are also required to reduce noise.

In a conventional defrosting operation device for an air conditioner, when the temperature of the outdoor heat exchanger drops to a certain temperature, a part of the high-pressure high-temperature gas supplied to the indoor heat exchanger is sent to the outdoor heat exchanger. It was general to perform defrosting operation by branching supply or switching the refrigeration cycle by a four-way valve to perform a short-time cooling operation.

[0004]

In such a conventional defrosting operation apparatus for an air conditioner, a part of the high-pressure high-temperature gas supplied to the indoor heat exchanger during the defrosting operation is supplied to the outdoor heat exchanger. Since branch supply is performed, there is a problem in that the amount of refrigerant supplied to the indoor heat exchanger is reduced, the indoor blowout temperature is reduced, and the heating capacity is reduced.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a defrosting operation device for an air conditioner, which is capable of performing defrosting operation without lowering the heating capacity.

A second object is to prevent vibration of the exterior panel and improve the performance of removing condensed water.

A third object is to blow off the condensed water to further improve the performance of removing the condensed water.

[0008]

In order to achieve the above first object, the defrosting operation apparatus for an air conditioner according to the present invention comprises a compressor, an indoor heat exchanger, a pressure reducing device and a refrigerant. A refrigeration cycle formed by connecting an electric expansion valve for controlling the flow rate of, an outdoor heat exchanger, and a four-way valve, and an inverter electrical component capable of changing the operating frequencies of the outdoor heat exchanger and the compressor. If the temperature of the outdoor heat exchanger is within the set value range during heating operation, the operating frequency of the compressor matches the natural frequency of the outdoor heat exchanger. The configuration will be changed as follows.

Further, in order to achieve the second object, the second
In addition to the first means, the means of (1) is provided with a vibration absorbing material around the outdoor heat exchanger.

In order to achieve the third object, the third
In addition to the first means or the second means, when the temperature of the outdoor heat exchanger is within the set value range during the heating operation, the outdoor blower is reversely rotated so as to blow air toward the outdoor heat exchanger. The switching means is provided to allow the switching.

[0011]

With the configuration of the first means described above, when the temperature of the outdoor heat exchanger decreases during the heating operation of the air conditioner, dew condensation water adheres to the outdoor heat exchanger and the dew condensation occurs. Matching the operating frequency of the compressor to the natural frequency of the outdoor heat exchanger before the water changes to frost, vibrating the outdoor heat exchanger to drop condensed water from the outdoor heat exchanger. Becomes

Further, by virtue of the structure of the second means, the vibration frequency can be increased by supporting the vibrating outdoor heat exchanger with the cushioning material to prevent noise, and the dew condensation performance can be improved. It will be possible.

Further, according to the structure of the third means, by rotating the outdoor blower in the reverse direction, air is intensively blown to the outdoor heat exchanger, the condensed water is blown away, and the performance of dropping the condensed water can be improved.

[0014]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the refrigeration cycle is separated into an indoor side device 1 and an outdoor side device 2, and is connected by piping through a three-way valve 3 provided in the outdoor side device 2 to the outdoor side device 2. Is provided with a compressor 4, a four-way valve 5, an outdoor heat exchanger 6, and an electric expansion valve 7 for controlling the pressure reduction and the flow rate of the refrigerant.

The indoor heat exchanger 8 is installed in the indoor equipment 1.
And an inlet, an outlet, and a blower (not shown).

The outdoor equipment 2 is covered with an exterior panel 9 and is composed of a refrigeration cycle parts chamber 10 provided with a compressor 4, a four-way valve 5 and an electric expansion valve 7, a motor 11 and an outdoor fan 12. A support plate 14 that supports the blower 13 and the motor 11 that are provided, a heat exchange chamber 15 in which the outdoor heat exchanger 6 is provided, and an electrical equipment chamber 17 in which electrical components 16 are provided.

Further, by using a sensor support 18 which is attached to the pipe of the outdoor heat exchanger 6 by brazing, the outdoor heat exchanger temperature sensor 19 is provided near the center of the pipe of the outdoor heat exchanger 6.
The chamber wall 2 of the refrigeration cycle parts chamber 10 is provided with an inflow port 21 through which the outside air serving as the suction air 20 flows, and the suction air vent 22 through which the suction air 20 flowing into the refrigeration cycle parts chamber 10 flows into the electrical equipment chamber Is provided. In addition, the outside air that has flowed into the electrical equipment chamber 17 flows into the heat exchange chamber 15, and the intake air 2 that has flowed into the heat exchange chamber 15
An exhaust port 24 through which 0 is discharged to the outside of the machine is provided, and is configured to be discharged together with the heat exchange air 25 that has passed through the outdoor heat exchanger 6.

With the above structure, during heating operation, the compressor 4 controls the operating frequency of the compressor 4 when the temperature detected by the outdoor heat exchanger temperature sensor 19 is within the set value range to control the outdoor heat exchanger 6. Outdoor heat exchanger 6 to match the natural frequency of
To drop water droplets that condense on the outdoor heat exchanger 6.

As described above, according to the defrosting operation apparatus for the air conditioner of the first embodiment of the present invention, the outdoor heat exchanger 6 is vibrated while the heating operation is continuously performed during defrosting to cause dew condensation. Since water droplets that fall off are dropped off, it is possible to prevent frost formation on the outdoor heat exchanger without lowering the heating capacity.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, a rubber 26 is attached to the outdoor heat exchanger 6 so as to wrap around the outdoor heat exchanger 6. Needless to say, a vibration absorbing material such as expanded polystyrene or a spring may be used instead of the rubber 26.

With the above structure, even if the vibration frequency of the outdoor heat exchanger 6 is increased, the vibration is absorbed by the rubber 26, so that the exterior panel 9 can prevent the vibration.

As described above, according to the defrosting operation apparatus for the air conditioner of the second embodiment of the present invention, the vibration of the exterior panel 9 is prevented, so that the vibration frequency of the outdoor heat exchanger 6 is increased. This makes it possible to improve the performance of removing dew condensation water due to an increase in the vibration frequency and improving the performance of preventing frost.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to FIGS. 4 and 5. The same parts as those of the first and second embodiments are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, a relay 27 is installed in the electrical equipment room 17.
Is provided, and a switching unit that can reversely rotate the motor 11 by switching the relay 27 is provided.

With the above structure, during heating operation, the compressor 4 controls the operating frequency of the compressor 4 when the temperature detected by the outdoor heat exchanger temperature sensor 19 is within the set value range to control the outdoor heat exchanger. 6, the outdoor heat exchanger 6 is vibrated, and the motor 11 is switched to the relay 27 to reversely rotate the blower 13 to drop water droplets that condense on the outdoor heat exchanger 6 and scatter. An air flow 28 is formed.

As described above, according to the defrosting operation apparatus for the air conditioner of the third embodiment of the present invention, since the blower 13 on the outdoor side is rotated in the reverse direction and the air is concentratedly blown to the outdoor heat exchanger 6, the heating is performed. Condensation water can be quickly dropped without lowering the performance, and the frost prevention performance can be improved.

[0029]

As is apparent from the above embodiments, according to the present invention, the outdoor heat exchanger temperature is detected during the heating operation of the air conditioner, and if it is within the set temperature range, the operating frequency of the compressor. By matching the natural frequency of the outdoor heat exchanger with the outdoor heat exchanger to vibrate the outdoor heat exchanger to remove dew condensation water adhering to the outdoor heat exchanger to prevent frost formation, so that heating is continued. It is possible to provide a defrosting operation device for an air conditioner that can be operated and can increase the heating capacity.

Further, since the vibration absorber is provided around the outdoor heat exchanger, the vibration is absorbed by the vibration absorber even if the vibration frequency of the outdoor heat exchanger is increased, so that the exterior panel. It is possible to prevent the vibration of the above, and further, the performance of removing the dew condensation water due to the increase of the vibration frequency can be improved, and the performance of preventing frost can be improved.

Further, since the blower is rotated in the reverse direction through the switching means to drop and disperse the water droplets that condense on the outdoor heat exchanger, the dew condensation water is quickly dropped to improve the frost prevention performance. The operation can be continued without lowering the heating capacity.

[Brief description of drawings]

FIG. 1 (a) is a lateral cross-sectional view of an outdoor unit equipped with a defrosting operation device for an air conditioner according to a first embodiment of the present invention (b) a defrosting operation device for an air conditioner according to the first embodiment. Sectional view of outdoor equipment equipped with

FIG. 2 is a refrigeration cycle diagram of the air conditioner of the first embodiment.

FIG. 3 (a) is a lateral cross-sectional view of an outdoor unit equipped with the defrosting operation device for an air conditioner of the second embodiment. (B) Has a defrosting operation device for an air conditioner of the second embodiment. Section view of outdoor equipment

FIG. 4 is a circuit diagram showing a motor reverse rotation device of the third embodiment.

FIG. 5 (a) is a transverse cross-sectional view of the outdoor equipment showing a state during defrosting operation, which is provided with the defrosting operation device for the air conditioner of the third embodiment (b) Air conditioning of the third embodiment Section view of outdoor equipment equipped with defrosting operation device

[Explanation of symbols]

 2 Outdoor equipment 4 Compressor 5 Four-way valve 6 Outdoor heat exchanger 7 Electric expansion valve 8 Indoor heat exchanger 13 Blower 16 Electrical component 26 Vibration absorber 27 Switching means

Claims (3)

[Claims] 1. A refrigeration cycle formed by connecting a compressor, an indoor heat exchanger, an electric expansion valve for controlling decompression and a flow rate of a refrigerant, an outdoor heat exchanger, and a four-way valve, and the outdoor heat. An outdoor device provided with a blower for cooling an inverter and an inverter electric component that can change the operating frequency of the compressor, and if the temperature of the outdoor heat exchanger during a heating operation is within a set value range, the compression is performed. A defrosting operation device for an air conditioner configured to operate by changing the operating frequency of the machine to match the natural frequency of the outdoor heat exchanger. 2. The defrosting operation apparatus for an air conditioner according to claim 1, wherein a vibration absorber is provided around the outdoor heat exchanger. 3. When the temperature of the outdoor heat exchanger is within a set value range during heating operation, switching means for rotating the blower in the reverse direction so as to blow air toward the outdoor heat exchanger is provided.
Alternatively, the defrosting operation device of the air conditioner according to 2.