JP3538037B2 - Dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifier having a refrigeration cycle in a housing, for dehumidifying suction air and blowing dry air.
In particular, the present invention relates to a dehumidifier that performs a defrosting operation depending on the temperature of an evaporator.

[0002]

2. Description of the Related Art In this type of dehumidifier, a heat exchange sensor is provided in the evaporator, and when a large amount of frost is generated in the evaporator during low-temperature operation, frost formation is detected based on the temperature of the evaporator and defrosting operation is performed. Had been defrosted. Further, the temperature of the heated air and the temperature of the heater attachment parts detected by the blowout temperature sensor are directly detected by the temperature sensor to prevent a failure of the appliance and a danger of fire when the heater is overheated. Separately, a suction temperature sensor is provided at the suction port or the like to measure the temperature of the suction air (room temperature), and a decrease in the dehumidifying capacity during low-temperature operation is prevented by simultaneously performing the heater operation.

[0003]

However, such a conventional dehumidifier has a problem that the manufacturing cost is relatively high because the heater is provided in addition to various sensors.

[0004]

In order to solve the above-mentioned drawbacks, the present invention focuses on this point, and in particular, the structure of the above-mentioned evaporator, condenser, and the like is provided between a suction port and a discharge port provided in a housing. A blower fan is arranged to form a blower path, and the air sucked from the suction port is cooled by an evaporator by the operation of the blower fan to form dew, and then heated by a condenser to discharge dry air from the blowout port. An automatic operation mode in which a heat exchange sensor that detects the temperature of the evaporator to perform a defrosting operation and a humidity sensor that detects the humidity of the intake air, and controls the operation of the compressor based on the detected humidity of the humidity sensor. In the provided dehumidifier, a heater is provided in a blowing path near the outlet, and an automatic operation mode for operating the heater in accordance with a temperature detected by a heat exchange sensor during the automatic operation is provided. An outlet temperature sensor is provided near the outlet to detect the temperature of the blown air after heating to prevent abnormal overheating of the heater. When the automatic operation starts, the operation of the heater according to the detected temperature of the outlet temperature sensor is performed. And an automatic operation mode for controlling the operation of the heater according to the temperature detected by the heat exchange sensor after a predetermined time has elapsed.

[0005]

The operation of the automatic operation will be described. If the operation is started and the automatic operation is selected (s6), the automatic operation is started and the blower fan 11 is started (s7). The humidity of the suction air is determined (s8),
If it is higher than 52%, in step 9 (s9), the compressor 2
4 is started and the operation is continued until the humidity is lower than 47% (s10). When the humidity is lower than 47%, the compressor 24 is stopped (s11), and it is determined whether the automatic operation is to be terminated. (S12), the blower fan 11 is stopped in the case of termination (s13), and in the case of not being terminated, step 8 (s12)
Returning to the point before 8), the intermittent operation of the compressor 24 is repeated so that the humidity of the suction air is kept between 47% and 52%.

The heater control is performed simultaneously with the intermittent operation based on the humidity of the suction air. It is determined whether the compressor 24 is operating at the start of the automatic operation (s14).
If the engine 4 is operating, it is determined in step 15 (s15) whether the temperature of the blow-out temperature sensor 18 is lower than 12 ° C.

If the blow-out temperature is higher than 12 ° C., in step 16 (s16), the operation is continued by the heat-exchange sensor 15 until the heat-exchange temperature of the evaporator 9 is continuously lower than 0 ° C. for 20 minutes. In this case, the operation of the heater 14 is started (s17), and if the operation of the heater 14 raises the room temperature and the temperature of the suction air, or if the humidity in the room decreases due to dehumidification and the compressor 24 stops (s1).
8) In step 19 (s19), the energization of the heater 14 is stopped, and it is determined whether the automatic operation is to be terminated (s20). If not, the process returns to step 16 to repeat the heater control based on the heat exchange temperature.

Next, when the temperature of the blow-out temperature sensor 18 is equal to or lower than 12 ° C. in the step 15 (s15) at the start of operation,
After 5 seconds, the operation of the heater 14 is started (s21), and the heater 14 is operated only for 20 minutes. If the heat exchange temperature after 20 minutes is 0 ° C. or less, the operation of the heater 14 is continued and the process proceeds to step 18 ( s22) The heat exchange temperature after 20 minutes is 0 ° C.
If it is larger than the heater 1 in step 19 (s19).
4 is stopped, and the above-described heater control based on the heat exchange temperature is repeated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a housing of a dehumidifier, in which a front case 3 and a rear case 4 are provided on a bottom plate 2 to form a body. It constitutes the outer shell. 5 is a suction port formed in the upper part of the front surface of the housing 1,
The front case 3 is provided with an opening having a number of horizontally long slits. Reference numeral 6 denotes an air outlet provided at the rear of the upper surface of the housing 1. The air outlet direction can be freely changed from a front obliquely upward direction to a rear obliquely upward direction by an openable and closable lid 7 which also functions as a wind direction plate when opened. You can do it.

Inside the suction port 5, there is provided a filter 8 made of a resin net or nonwoven fabric for removing dust mixed into the intake air. Inside the filter 8, an evaporator made of a fin tube type heat exchanger is provided. 9 to cool the suction air and dehumidify the moisture in the air by dew condensation.

Further downstream of the evaporator 9, there is provided a condenser 10 comprising a fin tube type heat exchanger like the evaporator 9, for heating the air cooled by the evaporator 9. Downstream of the condenser 10, a blower fan 11 and this fan 11
And a fan motor 12 for driving the air blower, and blows air through an air blow path 13 formed between the suction port 5 and the air outlet 6.

Numeral 14 denotes a heater provided between the blower fan 11 and the outlet 6 and comprises an electric heater of about 400 watts, which further heats the dry air and blows it into the room.
Reference numeral 15 denotes a heat exchange sensor that detects the temperature of the evaporator 9 and sends a signal to the control unit 16. Reference numeral 17 denotes a humidity sensor which is provided between the evaporator 9 and the filter 8 and detects the humidity of the intake air, and sends a signal to the control unit 16.

Reference numeral 18 denotes a blowout temperature sensor provided in the blowout port 6 for detecting the temperature of the dry air blown out from the blowout port 6 and sending a signal to the control section 16. A casing 19 is provided inside the rear case 4 between the rear case 4 and the fan motor 12, and guides air to the outlet 6 side. Further, the fan 1 is efficiently disposed between the condenser 10 and the fan 11.
1. A partition plate 20 provided with a ventilation opening in the center to guide the ventilation to
And a drain plate 2 that receives dew water below the evaporator 9.
1 is provided.

A drain 22 has one end connected to the bottom of the drain plate 21 and the other end located at the upper opening of the drain tank 23 for guiding the dew water collected by the drain plate 21 to the drain tank 23. It is. 24 is the blowing path 1
3, a compressor provided in a machine room 25 below the housing 1 and provided with the condenser 10, a decompression device (not shown), and an evaporator 9.
Are sequentially communicated by a refrigerant pipe to form a refrigeration cycle.
The drain tank 23 is detachably provided from the front in a tank storage room 26 provided on the front side of the machine room 25, and a float 28 is provided at the upper part for pressing a water full switch 27 to stop the operation of the dehumidifier when the water is full. ing.

The full-water switch 27 is a switch such as a micro switch, and is fixed to a partition plate 29 between the machine room 25 and the tank storage room 26. Pressed
When the operation arm 30 is released by the buoyancy when the water is full after the operation, the operation standby state is formed, the operation is stopped by detecting the water full state, the operation is stopped, and the full water lamp 31 is turned on to notify the user of the condensation in the drain tank 23. This is to urge the disposal of water and to notify that the dehumidifier has stopped due to full water.

Reference numeral 32 denotes the full lamp 31 and the operation lamp 3.
3, display lamps such as an automatic operation lamp 34 and a clothes drying operation lamp 35, an operation switch 36 and an operation selection switch 3
7, an operation unit including switches such as a timer switch 38, which is provided on the upper surface of the front case 3. Reference numeral 39 denotes a caster used for movement, and one caster is attached to each of the four corners of the bottom plate 2.

The operation will be described with reference to the flow charts shown in FIGS. 3 to 5. Pressing the operation switch 36 (s1)
Thereafter, the operation course is selected by sequentially pressing the operation selection switch 37 (s2), and the dehumidification operation course (s) is selected.
3) is to simply perform dehumidification by continuously operating the compressor 24. In addition, the clothes drying course (s4) operates the heater 14 in addition to the dehumidification by the continuous operation of the compressor 24.
Repeatedly turns OFF at 55 ° C and turns ON at 55 ° C.
The drying air of about 60 ° C. is blown out from the air to efficiently dry clothes and the like. Next, the automatic driving course (s
5) is to maintain an appropriate humidity by intermittently operating the compressor 24 in accordance with the humidity of the suction air detected by the humidity sensor 17 and also intermittently operating the heater 14 at low temperatures.

The automatic operation will be described in more detail with reference to FIG. 4. If the operation is started as described above and the automatic operation is selected (s6), the automatic operation is started and the blower fan 11 is started (s7). The humidity of the suction air detected by the humidity sensor 17 is determined (s8), and if it is higher than 52%, the compressor 24 is started in step 9 (s9) and the humidity becomes 47.
% (S10), and when the humidity falls below 47%, the compressor 24 is stopped (s11), and it is determined whether the automatic operation is to be terminated (s1).
2) In the case of termination, the blower fan 11 is stopped (s1).
3) If not finished, return to the point before step 8 (s8), and repeat the intermittent operation of the compressor 24 so that the humidity of the suction air is kept between 47% and 52%.

The heater control shown in FIG. 5 is performed simultaneously with the intermittent operation based on the humidity of the suction air. It is determined whether or not the compressor 24 is operating at the start of the automatic operation (s14). If there is, step 15 (s15)
It is determined whether the temperature of the outlet temperature sensor 18 is lower than 12 ° C. If the blowing temperature is higher than 12 ° C., step 16
In (s16), the operation is continued by the heat exchange sensor 15 until the heat exchange temperature of the evaporator 9 becomes lower than 0 ° C. for 20 minutes. When this condition is reached, the operation of the heater 14 is started (s17). If the room temperature rises and the temperature of the suction air rises by the operation of the heater 14, or if the indoor humidity falls due to dehumidification and the compressor 24 stops (s18), the heater 14 is energized in step 19 (s19). Stop,
It is determined whether the automatic operation is to be terminated (s20), and if not, the process returns to step 16 to repeat the heater control based on the heat exchange temperature.

Next, when the temperature of the blow-out temperature sensor 18 is equal to or lower than 12 ° C. in step 15 (s15) at the start of operation,
After 5 seconds, the operation of the heater 14 is started (s21), and the heater 14 is operated only for 20 minutes. If the heat exchange temperature after 20 minutes is 0 ° C. or less, the operation of the heater 14 is continued and the process proceeds to step 18 ( s22) The heat exchange temperature after 20 minutes is 0 ° C.
If it is larger than the heater 1 in step 19 (s19).
4 is stopped, and the above-described heater control based on the heat exchange temperature is repeated.

In this embodiment, the air temperature sensor 18 provided at the air outlet 6 is used. However, the air temperature sensor 18 may be directly attached to the heater 14 for use. It can be attached to and used.

As described above, the heat exchange sensor 15 necessary for use in defrost control without using the suction temperature sensor used in automatic operation and the blowout temperature sensor 18 necessary for controlling the heater 14 are used as substitutes for the suction temperature sensor. By doing so, it becomes possible to reduce the manufacturing costs associated therewith, such as the suction temperature sensor and wiring costs. If the room temperature is already low at the start of the operation, the heater 14 is quickly started by the blow-out temperature before the start of the heater 14, so that the delay of the heater control by the heat exchange sensor 15 at the start of the operation is prevented.

[0023]

As described above, according to the present invention, a suction temperature sensor used in automatic operation is not provided, and a heat exchange sensor necessary for use in defrost control and a blowout temperature necessary for control of a heater are used.
By using the temperature sensor as a substitute for the suction temperature sensor, it is possible to reduce the manufacturing costs associated therewith, such as the suction temperature sensor and wiring costs, and to provide an inexpensive dehumidifier. Room temperature already at the start of operation
If the air temperature is low, the heater
Is started quickly, so the heat exchange sensor
This is to prevent a delay in heater control.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a side sectional view showing a simplified structure of the same.

FIG. 3 is a flowchart illustrating the driving course.

FIG. 4 is a flowchart illustrating the operation of the compressor during the automatic operation.

FIG. 5 is a flowchart illustrating the operation of the heater during the automatic operation.

[Explanation of symbols]

5 Suction port 6 outlet 9 Evaporator 10 Condenser 11 blower fan 14 heater 15 Heat exchange sensor 18 Blow-out temperature sensor

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-9-280635 (JP, A) JP-A-9-60947 (JP, A) JP-A-7-233999 (JP, A) JP-A-7-280 233996 (JP, A) JP-A-5-126383 (JP, A) JP-A-5-33964 (JP, A) JP-A-6-78723 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 102

Claims (2)

(57) [Claims] An evaporator, a condenser, and a blower fan are arranged between a suction port and a blowout port provided in a housing to form a blower path, and air sucked from the suction port by operation of the blower fan. After being cooled and dewed by an evaporator, the air is heated by a condenser, the dry air is discharged from the outlet, and the temperature of the evaporator is detected to perform a defrosting operation. In a dehumidifier having a humidity sensor for detecting, and an automatic operation mode for controlling the operation of the compressor based on the humidity detected by the humidity sensor, a heater is provided in a blowing path near the air outlet, and during the automatic operation, A dehumidifier having an automatic operation mode for operating a heater according to a temperature detected by a heat exchange sensor. 2. An air supply path is formed by disposing the evaporator, the condenser and the blower fan between a suction opening and a blowout opening provided in a housing, and air sucked from the suction opening by the operation of the blower fan. After being cooled and dewed by an evaporator, the air is heated by a condenser, the dry air is discharged from the outlet, and the temperature of the evaporator is detected to perform a defrosting operation. In a dehumidifier having a humidity sensor for detecting, and an automatic operation mode for controlling the operation of the compressor based on the detected humidity of the humidity sensor, a heater for detecting the temperature of the blown air after heating in the vicinity of the outlet and heating the heater. A blowout temperature sensor is provided to prevent abnormal overheating of the heater.At the start of the automatic operation, the operation of the heater is started in accordance with the temperature detected by the blowout temperature sensor. Drive the heater A dehumidifier characterized by having an automatic operation mode for controlling.