JPH1019340A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which can selectively perform, in cooling operation either a cooling operation with preference to temperature and another cooling operation with preference humidity by switching, increase a dehumidifying amount at the time of cooling operation with preference to humidity and reduce consumption of electrical power. SOLUTION: This heat pump type air conditioner is constructed in such a manner that a filter 4, an indoor side heat exchanger 6, and a cross-flow fan 7 are arranged in an air passage 5 connecting a front surface suction port 2a, upper surface suction port 2b and outlet port 3 of a main body 1 so as o constitute a freezing cycle communicating with a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve and an indoor heat exchanger in sequence through a refrigerant pipe. In this case, a part of the indoor heat exchanger is shut off with a shut-off plate q during the cooling operation with preference to humidity, the electronic expansion valve is throttled to increase a dehumidifying amount, In turn, since the shut-off plate 9 and the electronic expansion valve are released during the cooling operation with preference to temperature and the heating operation, the prior art cooling or heating capacity can be maintained. In addition, during the cooling operation with preference to humidity, a dehumidifying amount is increased, resulting in that a comfortable feeling can be attained even if the temperature is not lowered down to a set temperature for the cooling operation with preference to temperature and so power consumption is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to a dehumidifying function during a cooling operation.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional indoor unit of a heat pump type air conditioner has an air passage 5 connecting suction ports 2a and 2b provided on a front surface and an upper surface of a main body 1 and an air outlet 3, respectively. Inside, a filter 4, an indoor heat exchanger 6, and a cross flow fan 7 are provided. The indoor-side heat exchanger 6 is composed of an upright portion and a rear inclined portion obtained by bending the upper end of the upright portion rearward. In recent years, however, the indoor side heat exchanger 6 has been improved in order to improve heating performance and reduce power consumption. The heat exchanger 6 is provided with an upright portion and a lower inclined portion 8 in which the upper end of the upright portion is bent rearward and a lower inclined portion 8 in which the tip of the rear inclined portion is bent downward to increase the area of the heat exchanger. By doing so, the amount of ventilation is increased to respond. For this reason, at the time of cooling, the temperature of the indoor heat exchanger 6 increases, and the amount of dehumidification decreases. In addition, when the indoor temperature approaches the set temperature and the rotation speed of the compressor motor decreases, the temperature of the indoor heat exchanger 6 approaches the dew point temperature of the air, and the amount of dehumidification decreases, so that the indoor humidity does not decrease. The problem has been that comfort has been impaired.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, increases the amount of dehumidification during cooling operation with priority on dehumidification, and switches between cooling operation and temperature reduction with priority on temperature reduction. It is aimed at reduction.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger in order of refrigerant. A heat pump type refrigeration cycle communicating through a pipe is provided, a suction port is provided on an upper front surface and an upper surface of the main body, an outlet is provided on a lower front surface, and an air passage connecting the suction port and the air outlet is provided in the indoor side. In an air conditioner in which a heat exchanger and a blower are arranged, a cooling operation can be switched between a cooling operation with a priority on temperature and a cooling operation with a priority on humidity, and an opening / closing for shutting off or opening a part of the indoor heat exchanger. A possible shielding plate is provided, the shielding plate is opened during the temperature-priority cooling operation, and the shielding plate is closed during the humidity-priority cooling operation to block a part of the indoor heat exchanger and to expand the air. Try to squeeze the valve And wherein the Rukoto.

Further, when the temperature approaches the set temperature during the humidity-priority cooling operation, the amount of throttle of the expansion valve is increased.

Further, the indoor heat exchanger comprises an upright portion, a rear inclined portion having an upper end of the upright portion bent rearward, and a lower inclined portion having a front end of the rear inclined portion bent downward. It is characterized by becoming.

Further, the indoor heat exchanger is characterized by comprising an upright portion and a rear inclined portion having an upper end of the upright portion bent rearward.

Further, the invention is characterized in that the shielding plate is disposed so as to face a downward inclined portion of the indoor heat exchanger.

Further, the invention is characterized in that the shielding plate is arranged on the windward side of the indoor heat exchanger.

[0010]

According to the above construction, by providing a shielding plate for shielding the indoor heat exchanger, a part of the indoor heat exchanger is shielded during the cooling operation with priority on dehumidification, and the indoor heat exchange is performed. Since the area of the heat exchanger can be reduced, the temperature rise of the indoor heat exchanger is suppressed, and at the same time, the expansion valve is throttled, so that sufficient dehumidification becomes possible. Sufficient cooling is possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a heat pump type refrigeration cycle circuit of the present invention. In FIG.
11 is a four-way valve, 12 is an outdoor heat exchanger, 13 is an expansion valve,
Reference numeral 6 denotes an indoor heat exchanger, which is sequentially communicated via a refrigerant pipe. Reference numeral 9 denotes an openable and closable shielding plate for shielding or opening a part of the indoor heat exchanger 6, and reference numeral 14 denotes a motor for driving the shielding plate, which is controlled by a control unit together with the expansion valve 13. FIG. 2 is a sectional view of a main part of an air conditioner according to a first embodiment of the present invention. In FIG.
2a and 2b are suction ports provided on the front and top surfaces, respectively.
4 is a filter, 3 is an outlet, 5 is an air passage connecting the inlets of 7a and 7b and 9 outlets, and in the passage there is an upright portion, and a rear inclined portion having the upper end of the upright portion bent. 6, an indoor heat exchanger 6 having a shape of a downward inclined portion 8 formed by bending the tip of the rear inclined portion downward, and a cross flow fan 7 are provided. Reference numeral 9 denotes an openable and closable shield plate that is rotatably mounted on a fulcrum on the side surface of the main body and shields or opens a part of the indoor heat exchanger 6, and 14 denotes a motor that drives the shield plate 9, not shown. Is controlled by the control unit.

FIG. 5 is a flowchart of the control of the present invention. In the operation selected by the remote controller or the like, it is determined whether the operation is heating or cooling. If the operation is heating, a normal operation instruction is output, and the heat exchanger shielding release is released. An instruction is output to rotate the shielding plate 9 to release the shielding of the lower inclined portion 8 of the indoor heat exchanger 6. Next, an instruction to release the expansion valve is released, and the expansion valve 13 is released from the restriction. Next, the operation is started. On the other hand, if it is cooling, it is determined whether the cooling operation has priority on temperature or the cooling operation has priority on humidity. If the cooling operation has priority on temperature, the same control as during the heating is performed. on the other hand,
In the case of the cooling operation in which the priority is given to the humidity, an instruction to shield the heat exchanger is output and the shield plate 9 is rotated, and the lower inclined portion 8 of the indoor heat exchanger 6 is rotated.
Shield. Next, an instruction to increase the expansion valve throttle is output, and the throttle of the expansion valve 13 is increased. Next, the set temperature and the room temperature are compared. If the set temperature is equal to or close to the set temperature, an instruction to increase the expansion valve throttle is output, and the throttle of the expansion valve 13 is increased. On the other hand, when the set temperature is different from the room temperature, the operation is continued by instructing the continuation of the operation, and the comparison between the set temperature and the room temperature is repeated.

The operation of the above configuration will now be described. When a humidity-priority cooling operation is selected by a remote controller or the like, the motor 14 is driven by an instruction of the control unit, and the shielding plate 9 is driven.
Is rotated in the direction of the arrow, the lower inclined portion 8 of the indoor heat exchanger 6 is shielded, the area of the indoor heat exchanger 6 is reduced, the temperature rise is suppressed, and the expansion valve 13 is throttled to reduce the amount of dehumidification. To increase. When the room temperature approaches the set temperature and the number of revolutions of the compressor motor decreases, the amount of dehumidification decreases, but the amount of dehumidification can be maintained because the throttle of the expansion valve 13 is further increased by an instruction from the control unit. On the other hand, when the cooling operation of the temperature priority is selected by the remote controller or the like during the cooling operation, the motor 14 is driven by the instruction of the control unit, the shielding plate 9 rotates in the direction opposite to the arrow, and the shielding of the indoor heat exchanger 6 is performed. Is released, and at the same time, the area of the indoor heat exchanger 6 is increased, and at the same time, the throttle of the expansion valve 13 is released according to an instruction from the control unit. As described above, it is possible to switch between the cooling operation with priority on humidity and the cooling operation with priority on temperature. Also, during the heating operation, the motor 14 is driven by the instruction of the control unit, the shield plate 9 rotates in the direction opposite to the direction of the arrow, the shielding of the indoor heat exchanger 6 is released, and the indoor heat exchanger 6 At the same time as the area increases, the throttle of the expansion valve 13 is released by an instruction from the control unit, so that the heating capacity is improved.

FIG. 3 is a cross-sectional view of a main part of an air conditioner according to a second embodiment of the present invention. The upper part of the indoor heat exchanger 6 is inclined backward, and a shielding plate is opposed to the upper inclined part. 9 are provided.

FIG. 4 is a sectional view of an essential part of an air conditioner according to a third embodiment of the present invention, in which the indoor heat exchanger 6 has an upright portion, and the upper end of the upright portion is bent rearward. As a part, a shielding plate is provided on the windward side so as to face the rear inclined part.

[0016]

As described above, according to the air conditioner of the present invention, a part of the indoor heat exchanger is shielded by the shielding plate during the cooling operation with priority on humidity, the area is reduced, and the air conditioner expands at the same time. The dehumidifying amount increases to increase the throttle of the valve, and during the temperature-priority cooling operation, the shielding of the indoor heat exchanger is released, and the normal operation of releasing the expansion valve throttling allows the humidity-priority cooling operation and the temperature priority The cooling operation can be selected, and the conventional performance at the time of the cooling operation and the heating operation in which the temperature is prioritized can be maintained. Further, even when the temperature approaches the set temperature during the cooling operation with priority on humidity and the number of revolutions of the compressor motor decreases, the amount of dehumidification can be maintained, and the feeling of comfort is not impaired. In addition, the amount of dehumidification increases during the cooling operation with priority on humidity, so that a comfortable feeling can be obtained even if the temperature is not lowered to the setting temperature during the cooling operation with priority on temperature, so that the power consumption is reduced.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a heat pump type refrigeration cycle according to one embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the air conditioner according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a main part of an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of an air conditioner according to a third embodiment of the present invention.

FIG. 5 is a flowchart of control according to the present invention.

FIG. 6 is a sectional view of a main part of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Filter 5 Air passage 6 Indoor heat exchanger 7 Cross flow fan 8 Downward inclined part of indoor heat exchanger 9 Shield plate 10 Compressor 11 Four-way valve 12 Outdoor heat exchanger 13 Expansion Valve 14 motor

Claims (6)

[Claims] 1. A heat pump type refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are sequentially communicated via a refrigerant pipe, and an upper front surface and an upper surface of a main body. And an outlet at the lower front,
In an air conditioner in which the indoor side heat exchanger and the blower are arranged in an air passage connecting the suction port and the air outlet, a cooling operation can be switched between a temperature-priority cooling operation and a humidity-priority cooling operation. Providing an openable and closable shield plate for blocking or opening a part of the ventilation of the inner heat exchanger, opening the shield plate during the temperature-priority cooling operation, and closing the shield plate during the humidity-priority cooling operation, An air conditioner characterized in that the ventilation of a part of the indoor heat exchanger is blocked and the expansion valve is throttled. 2. The air conditioner according to claim 1, wherein when the temperature approaches a set temperature during the humidity-priority cooling operation, the expansion amount of the expansion valve is increased. 3. The indoor heat exchanger includes an upright portion, a rear inclined portion having an upper end of the upright portion bent rearward, and a lower inclined portion having a distal end of the rear inclined portion bent downward. The air conditioner according to claim 1 or 2, wherein: 4. The air conditioner according to claim 1, wherein the indoor heat exchanger comprises an upright portion and a rear inclined portion having an upper end of the upright portion bent rearward. Machine. 5. The air conditioner according to claim 3, wherein the shielding plate is disposed so as to face a lower inclined portion of the indoor heat exchanger. 6. The indoor heat exchanger according to claim 1, wherein the shield plate is arranged on the windward side of the indoor heat exchanger.
The air conditioner as described.