JP2018159524A - Integrated air conditioner - Google Patents

Abstract

To shorten the drying time of laundry. A cold air inlet port is connected to an evaporator, a cold air fan, and a cold air outlet port to form a cold air blowing path, and a hot air inlet port, a condenser, and a hot air air source are connected. The fan 9 is connected to the hot air outlet 23 to form a hot air blowing path 24, and includes a bypass portion 25 that connects the cold air blowing path to the hot air blowing path. The cooling means has a switching means 26 that is closed and communicates the cooling air blowing path and the warm air blowing path, and the switching means has a cooling air mode in which the cooling air is blown out from the cooling air outlet, and the cooling air outlet is closed to warm air outlet. A control unit 43 for selecting a drying mode for blowing dry air from, a heat exchange sensor 46 for detecting the temperature of the evaporator, and the operation of the compressor at the temperature of the heat exchange sensor during the drying mode operation at a low room temperature. And defrost the evaporator by operating the cold air fan. Ku defrosting during operation, has a defrosting control unit 47 for switching the air flow path to cool mode side by switching means. [Selection] Figure 5

Description

  The present invention relates to an integrated air conditioner, and more particularly to an integrated air conditioner that uses a unit as a cold air fan or a dehumidifier in a room.

  When a separate type air conditioner cannot be installed due to reasons such as difficulty in connecting refrigerant pipes due to room layout, etc. Integral type cool air fans with built-in small capacity compressors and refrigeration cycles are used. This cool air blower blows out the cool air cooled by the evaporator from the front outlet and simultaneously blows out the warm air exhausted by the condenser from the back. Such a cool air machine is also used as a dehumidifier for the purpose of drying laundry.

  7 and 8 are schematic cross-sectional views of a plane of a conventional example, and the housing has a cold air inlet a, a cold air outlet b, a hot air inlet c, and a hot air outlet d, The housing has a compressor, an expansion valve, an evaporator e, a cold air fan f, a condenser g, and a hot air fan h. The cold air inlet a and the evaporator e, the cold air fan f, and the cold air The blower outlet b is connected to form a cool air blowing path i, and the hot air inlet c is connected to the condenser g, the hot air fan h, and the hot air outlet d to connect the hot air blower. A path j is formed, the cold air blowing path i and the hot air blowing path j are disposed adjacent to each other via a partition wall k, and the cold wind blowing path i and the hot air blowing path j are disposed in the vicinity of the cold wind outlet b. The bypass part 1 is provided in the vicinity of the cool air outlet b, and the bypass part 1 closes the cool air outlet b, and the cool air blow path i and the warm air blow path j. A switching unit m that communicates with the switching unit m, and a cooling air mode (see FIG. 7) in which the cooling air is blown out from the cooling air outlet b; The control part which selects the drying mode (refer FIG. 8) which blows dry air from d is provided.

  In this way, in the summer, it is used as a cold air blower by taking cold air drawn from the cold air outlet b provided on the front surface as shown in FIG. When not used as a cold air blower, as shown in FIG. 8, the air sucked from the cold air suction port a is cooled by the evaporator e, and the dry air from which moisture in the air has been removed by condensation in the evaporator e is converted into the condenser g. It is used as a dryer or a dehumidifier by blowing and drying air from a hot air outlet d provided on the back surface. (For example, see Patent Document 1)

Japanese Patent No. 4489571

  In such a conventional integrated air conditioner, if the drying mode operation is continued at a low temperature in winter for the purpose of drying laundry, frost is gradually generated in the evaporator e and the evaporator e is clogged. In order to prevent heat exchange from becoming impossible, it is necessary to perform a defrosting operation to melt the frost of the evaporator e by periodically stopping the compressor and operating only the cold air fan f when frost is generated. Accordingly, if the time spent for the defrosting operation becomes longer, the drying time of the laundry becomes longer, and it is necessary to shorten the drying time of the laundry as much as possible.

  In order to solve the above-mentioned problems, in particular, the structure has a cold air inlet, a cold air outlet, a hot air inlet, and a hot air outlet, and a compressor and an expansion in the casing. A valve, an evaporator, a cold air fan, a condenser, and a hot air fan, and the compressor, the expansion valve, the evaporator, and the condenser are sequentially connected by a refrigerant pipe to form a refrigeration cycle, and the cold air The air intake port and the evaporator, the cold air fan, and the cold air outlet are connected to form a cold air blowing path, and the hot air inlet and condenser, the hot air fan, and the hot air outlet are connected to each other. A cold air blowing path and a hot air blowing path are arranged adjacent to each other via a partition wall so as to communicate with each other to form a warm air blowing path, and the cold air blowing path and the warm air blowing path are disposed in the vicinity of the cold air outlet. A bypass part that communicates with the bypass part, the bypass part having a switching means, the switching means opens the outlet for cold air By closing between the cool air blow path and the warm air blow path, the cool air mode in which the cool air is blown out from the cool air blow outlet, the cool air blow outlet is closed, and the cool air blow path and the hot air blow path are communicated. In an integrated air conditioner having a control unit for selecting a drying mode for blowing dry air from the hot air outlet, the temperature of the evaporator and refrigerant piping in the vicinity of the evaporator is detected. A heat exchange sensor is provided, detects the state of frost generated in the evaporator according to the temperature of the heat exchange sensor during the drying mode operation, stops the operation of the compressor, and operates the cold air fan to operate the evaporator During the defrosting operation for removing the frost, the defrosting control unit that switches the air blowing path to the cold air mode side by the switching means is provided.

  According to the present invention, during the defrosting operation, the air sucked from the cold air suction port for warming the frosted evaporator is switched to the cold air mode side by the switching means, so that the air sucked through the evaporator Since it is discharged directly from the cool air blow path without passing through the wind blow path, the time required for the defrosting operation is shortened by increasing the amount of air passing through the evaporator by reducing the blowing resistance. Thus, the laundry drying time can be shortened.

The perspective view at the time of the cold wind mode driving | operation of this invention one Example. The principal part plane enlarged sectional view at the time of the cold air mode operation. The principal part plane enlarged sectional view at the time of the dry mode operation. The perspective view which shows attachment of the same exhaust duct. Explanatory drawing which shows the action | operation at the time of the defrost operation. The block diagram of the control circuit. Explanatory drawing which shows the action | operation at the time of the defrost driving | operation in another Example. The schematic sectional drawing which shows ventilation in the cold wind mode of a prior art example. The schematic sectional drawing which shows the ventilation of the drying mode of a prior art example.

An embodiment of an air conditioner of the present invention will be described based on the drawings of FIGS.
Reference numeral 1 denotes a casing of an air conditioner, which includes a bottom plate 2 and a right frame 3 and a left frame 4 that are engaged at the center of the front, top, and back surfaces. The casing 1 is provided with an evaporator 5, a condenser 6, a compressor 7, an expansion valve (not shown) and the like of a refrigeration cycle, and a cool air fan 8 is provided downstream of the evaporator 5 and a condenser. 6, a hot air fan 9 is provided on the downstream side, and a blower motor 10 that rotates the cold air fan 8 and the hot air fan 9 on the same shaft is fixed to the cold air fan 8 side of the partition wall 11. .

  The right frame 3 is provided with a cold air inlet 12 from the center to the upper part of the right side surface, and the cold air inlet 12 is covered with a filter 13 for removing dust in the intake air. A tank hole 15 for attaching and detaching the drain tank 14 is provided below the cold air inlet 12. When the drain tank 14 is mounted, the outer surface of the drain tank 14 is formed flush with the outer surface of the right frame 3. Above the cold air inlet 12, a handle recess 16 during transportation is formed integrally.

  The left frame 4 is provided with a hot air inlet 17 from the center to the upper part of the left side surface, and the hot air inlet 17 is covered with a filter 13 like the cold air inlet 12. In addition, a concave portion 16 having the same shape is integrally formed at a position facing the concave portion 16 for holding on the right frame 3.

  A front panel 18 is provided above the mating surface of the right frame 3 and the left frame 4 in the lower center of the front surface, and a cold air outlet 19 is provided above the front panel 18. The cold air outlet 19 is provided with a pair of left and right vertical louvers 20 that adjust the direction of the cold air in the left-right direction and close the cold air outlet 19 when stopped or in the drying mode. A large number of lateral louvers 21 for adjusting the direction of the wind direction are attached.

On the right side of the partition wall 11, the cold air inlet 12, the evaporator 5, the cold air fan 8, and the cold air outlet 19 are communicated to form a cold air blowing path 22, and on the left side of the partition wall 11. The hot air inlet 17, the condenser 6, the hot air fan 9, and the hot air outlet 23 communicate with each other to form a hot air blowing path 24.
The cold air blowing path 22 on the left side of the cold air blowing outlet 19 is provided with a bypass 25 that communicates with the hot air blowing path 24 between the condenser 6 and the hot air suction port 17. Is led to the condenser 6 and heated.

  The vertical louver 20 has two inner and outer blades formed substantially in parallel with each other, and a horizontal louver 21 is rotatably provided between the two blades. A large number of the horizontal louvers 21 are connected to each other. By connecting with each other (not shown), the angle of each lateral louver 21 is made constant.

Further, an auxiliary plate 26 is provided inside the left side of the vertical louver 20, and the vertical louver 20 is automatically closed by a louver motor 27 during a dry mode operation or operation stop, and the auxiliary plate 26 is interlocked with the vertical louver 20. Thus, the outer surface of the vertical louver 20 is prevented from condensing by the cold air by connecting the inner blades of the vertical louver 20 and closing the cold air outlet 19 twice.
The louver motor 27 has a mechanism for simultaneously rotating the shafts of the two vertical louvers 20 and the auxiliary plate 26, and uses a DC step motor. By opening and closing the bypass portion 25 with the auxiliary plate 26, communication and blocking of the cool air blowing path 22 and the warm air blowing path 24 can be controlled. By operating the vertical louver 20, auxiliary plate 26, and louver motor 27 as switching means, the bypass portion 25 is opened and closed, and at the same time, the cold air outlet 19 can be double closed when operating in the cold air mode.

  Reference numeral 28 denotes an operation unit provided on the front side of the upper surface of the casing 1, which includes an operation switch 29 for stopping operation, a mode switch 30 for switching between cold air mode operation and dehumidification mode operation, a timer switch 31 and the like. A number of lamps 32 for displaying the status are provided.

  The hot air outlet 23 is located from the rear side to the back side of the upper surface of the housing 1, and the hot air blowing direction is switched between the upward direction and the backward direction by switching the exhaust louver 33. The exhaust louver 33 is the same surface as the upper surface, covers the hot air outlet 23 on the upper surface side, and a rotating shaft provided on the left and right inside the hot air outlet 23 from the rear exhaust position where the hot air is exhausted backward. The exhaust louver 33 covers the hot air outlet 23 on the back side and warms up upward by rotating it about 90 degrees manually with a fulcrum (not shown) as a fulcrum. Is to exhaust.

  Reference numeral 34 denotes an exhaust duct, which is composed of a duct main body 35 formed of a flexible thin film material such as cloth or polyethylene, and a connector 36 attached to one end of the duct main body 35 with tape or the like. In order to prevent the duct body 35 from being crushed and increasing the blowing resistance, reinforcing rings 37 made of plastic and having a diameter of about 15 cm are sewn into the plurality of thin films.

On the back side of the hot air outlet 23, a duct mounting portion 39 is formed integrally with the right frame 3 and the left frame 4 with U-shaped grooves 38 formed around the left and right sides and the lower side of the outlet 23. Has been.
In order to attach the exhaust duct 34 to the hot air outlet 23, it is confirmed whether the exhaust louver 33 is on the upper surface side and the blowing direction of the hot air is set on the rear side, and the connecting device 36 Is inserted into the groove 38 of the duct mounting portion 39 from above, the duct body 35 is extended, and the other end is taken out of the room or the hallway through a window or the like. Is completed.

  Reference numeral 40 denotes a storage cover that is located on the back surface of the housing 1 and below the hot air outlet 23. A storage section of the exhaust duct 34 is provided in a space between the storage cover 40 and the fan case 41 of the fans 8 and 9. 42 is formed.

  The fan case 41 is provided integrally with the partition wall 11 by resin molding, or is provided separately and assembled by engagement of claws or the like.

  The evaporator 5 and the condenser 6 are fin tube type heat exchangers in which a copper tube penetrates a large number of aluminum fins having good thermal conductivity. A compressor 7 is provided on the bottom plate 2, and the compressor 7, the condenser 6, an expansion device (not shown) such as an expansion valve, the evaporator 5, and the like are sequentially communicated with refrigerant pipes to perform a refrigeration cycle. Forming. A drain pan (not shown) is provided below the evaporator 5, and condensed water generated in the evaporator 5 is collected by the drain pan and stored in the drain tank 14.

  A control unit 43 is connected to switches such as the operation switch 29 and the mode change switch 30 and a temperature sensor 44, a humidity sensor 45, a heat exchange sensor 46, and the like on the input side, and to the blower motor 10 and the compression on the output side. The machine 7, the louver motor 27, the lamp 32, and the like are connected, and the operation mode and the air flow rate are changed according to the switch operation at the operation unit 28 and the signals of the sensors 44, 45, and 46. When the heat exchange sensor 46 detects the temperature of the evaporator 5 and the refrigerant pipe near the evaporator 5 and operates in the dry mode in order to dry the clothes in a state where the room temperature is lowered in winter, The state of frost generated in the evaporator 5 is detected based on the temperature detected by the heat exchange sensor 46. Further, a defrosting control unit 47 that performs a defrosting operation when the amount of frost adhering to the evaporator 5 increases and the heat exchange amount by the evaporator 5 decreases beyond an allowable range is provided in the control unit 43. I have.

  The air blowing path during the cold air mode operation will be described. The cold air outlet 19 is opened by the vertical louver 20, and the auxiliary plate 26 that is simultaneously interlocked closes the bypass portion 25, so that the air blowing path 22 and the air blowing path for the hot air 24 is separated. As a result, the air sucked from the cold air suction port 12 is dust-removed by the filter 13, cooled by the low-temperature evaporator 5, passed through the cold air fan 8, and then passed from the cold air outlet 19 to the vertical louver 20. And cold wind is guided and blown out by the horizontal louver 21. At the same time, the air sucked from the hot air suction port 17 is dust-removed by the filter 13, heated by the high-temperature condenser 6, and passed through the hot air fan 9 as hot air from the hot air outlet 23. If the heat is exhausted and the exhaust duct 33 is connected to the hot air outlet 23, the exhaust duct 33 exhausts the air to the outside.

  Next, the air flow path during the dry mode operation will be described. The cold air outlet 19 is closed by the vertical louver 20, and the auxiliary plate 26 that is simultaneously interlocked opens the bypass portion 25, so The wind blowing path 24 is communicated. As a result, the air sucked from the cold air inlet 12 removes dust by the filter 13 and is cooled by the low temperature evaporator 5 to remove moisture in the air, and then passes through the cold air fan 8. However, since the cold air outlet 19 is closed by the vertical louver 20 and the auxiliary plate 26, the cold air passes through the bypass unit 25 and is sent to the condenser 6, where it is heated by the condenser 6. Then, the dried air is blown out from the hot air outlet 23 through the hot air fan 9. The dry air is used to dry the laundry and dehumidify the room.

  Next, the defrosting operation during the drying mode operation will be described with reference to FIG. 5. The drying mode operation is operated by the air passage described above, and the compressor 7 is normally operated continuously to function the refrigeration circuit. Continue. However, if the operation is continued in a state where the room temperature is lowered in winter (for example, when the room temperature is set to 5 ° C.), the temperature of the evaporator 5 (the temperature of the heat exchange sensor 46) decreases to about −5 ° C. Moisture in the air passing through the evaporator 5 freezes and gradually adheres to the evaporator 5, and frost adheres to the evaporator 5, thereby increasing the ventilation resistance of the evaporator 5, and the heat exchange efficiency of the evaporator 5. The temperature of the evaporator 5 (the temperature of the heat exchange sensor 46) further decreases and the amount of attached frost increases. Therefore, a defrosting operation is performed to remove frost adhering to the evaporator 5 when the state in which the temperature of the evaporator 5 (the temperature of the heat exchange sensor 46) is lowered to −10 ° C. or lower is continued for a predetermined time (20 minutes). Moreover, the timing (conditions for starting the defrosting) at which such a defrosting operation is started varies depending on each model such as the size of the compressor 7 and the evaporator 5.

  If the defrosting start condition is satisfied, the defrosting operation is started, the compressor 7 is stopped, and the operation of the blower motor 10 is continued, so that the evaporator 5 is discharged by the room temperature air sucked from the cold air inlet 12. When the frost melts and the temperature of the heat exchange sensor 46 reaches 2 ° C., the compressor 7 is restarted to return to the drying operation. During such a defrosting operation, the auxiliary plate 26 is temporarily rotated in the direction to close the bypass portion 25, and the vertical louver 20 is opened by the cold air outlet 19 to form the air blowing circuit in the cold air mode. As a result, the resistance of the air blowing path is reduced compared to the normal drying mode, so that the amount of air passing through the evaporator 5 is increased and the time for defrosting is shortened (defrosting time), and the defrosting time is shortened. By doing so, the drying time of the laundry can be shortened. In this embodiment, when the defrosting operation is performed as it is without switching the blowing path, the defrosting operation is required for about 17 minutes. However, when the defrosting operation is performed by switching the blowing path, the defrosting operation is performed. It can be shortened to 6 minutes. In addition, cold air is blown forward from the cold air inlet 12 during the defrosting operation, but it is considered that there are no people around the air conditioner because the room temperature at which the defrosting operation is required is low temperature. It does not give people discomfort by blowing cold air forward.

Moreover, if the ventilation path at the time of a defrost operation is switched to the cold wind mode side and the drying mode side alternately by arbitrary time like FIG. 7, the time of a defrost operation will extend in about 6 to 17 minutes. But
By keeping the front cool air inlet 12 open, it is possible to prevent a user from misunderstanding that the user has switched to the cooling mode operation without permission.

  In this way, during the defrosting operation, the air sucked from the cold air inlet 12 that warms the frosted evaporator passes through the evaporator 5 by switching the air blowing path to the cold air mode side by the switching means 20 and 26. After that, since the air is discharged directly from the cool air blow path 22 without passing through the warm air blow path 24, the air flow passing through the evaporator 5 is increased by reducing the air blowing resistance. The time spent for the frost operation is shortened, and the drying time of the laundry can be shortened.

In addition, by switching the air path during the defrosting operation alternately between the cold air mode side and the dry mode side at any time, the user switched to the cooling mode operation without permission even though the user was performing the dry mode operation. It is possible to prevent misunderstanding that it is. Also,
Even during the defrosting operation, the drying time of the laundry can be shortened by blowing air to the laundry with the airflow intermittently different from the hot air outlet 27.

  Although embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, the switching time between the cold air mode and the drying mode in FIG. 7 is alternately switched at the same time interval, but may be changed to an arbitrary time.

DESCRIPTION OF SYMBOLS 1 Case 5 Evaporator 6 Condenser 8 Fan for cold air 9 Fan for hot air 12 Air intake for cold air 17 Air intake for hot air 19 Air outlet for cold air 20 Vertical louver (switching means)
22 Air blow path for cold air 23 Air outlet for hot air 24 Air flow path for hot air 25 Bypass section 26 Auxiliary plate (switching means)
43 Control Unit 46 Heat Exchange Sensor 47 Defrost Control Unit

Claims (2)

The housing has a cold air inlet, a cold air outlet, a hot air inlet, and a hot air outlet,
A compressor and an expansion valve, an evaporator, a fan for cold air, a condenser, and a fan for hot air in the housing;
Refrigerating cycle is formed by sequentially connecting the compressor and the expansion valve, the evaporator, and the condenser with refrigerant piping,
The cold air inlet and the evaporator, the cold air fan, and the cold air outlet are communicated to form a cold air blowing path,
The hot air inlet and the condenser, the hot air fan, and the hot air outlet are connected to form a hot air blowing path,
The air passage for cold air and the air passage for hot air are disposed adjacent to each other via a partition wall,
Provided with a bypass portion in the vicinity of the cold air outlet for communicating the air passage for cold air and the air passage for hot air,
The bypass unit has switching means,
The switching means opens the cold air outlet, and closes the air passage for cold air and the air passage for hot air to cool air from the air outlet for cold air,
Integrated air provided with a controller for closing the cold air outlet and selecting a drying mode for blowing dry air from the hot air outlet by communicating the air passage for cold air and the air passage for hot air In the harmony machine,
A heat exchange sensor that detects the temperature of the refrigerant pipe near the evaporator and the evaporator,
Defrosting is performed by detecting the state of frost generated in the evaporator according to the temperature of the heat exchange sensor during the drying mode operation, and removing the frost in the evaporator by stopping the operation of the compressor and operating the cold air fan. An integrated air conditioner having a defrosting control unit that switches the air blowing path to the cold air mode side by the switching means during operation.   2. The integrated air conditioner according to claim 1, further comprising a defrosting control unit that operates by alternately switching the air blowing path between the cold air mode side and the drying mode side by the switching unit during the defrosting operation.

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