JPS59160497A - Clothes dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a clothes dryer, and more particularly to a clothes dryer equipped with a means for automatically stopping operation when the items to be dried are dried. It is.

[Prior art]

Conventionally, clothes dryers were controlled by one type of amount of clothes.

This was done by adjusting the ambient temperature and other factors and setting the drying time appropriately based on the intuition of the user.

Therefore, it was rarely possible to set the optimum time, and it was sometimes too long or too short, resulting in poor efficiency.

Therefore, various control means have been proposed that stop the operation by detecting the temperature difference between the ambient temperature and the exhaust temperature or the electrical resistance value of clothing. 9. If the operation is stopped under the same conditions due to differences in ambient temperature, etc., the drying rate of the clothes will vary, which has the disadvantage of requiring some kind of correction.

[Purpose of the invention]

In view of the drawbacks of the prior art described above, the present invention has a simple configuration.
The object of the present invention is to provide a clothes dryer that is automatic, that is, equipped with means for automatically stopping operation when the clothes are dry.

[Summary of the invention]

The structure of the clothes dryer according to the present invention is such that a timer motor circuit of a timer that controls energization of a heater and a blower fan drive motor in a clothes dryer is connected to a contact point of a detection means that operates upon detecting drying of the items to be dried. and a drying control means which is opened and closed by a parallel circuit with a contact whose opening and closing are controlled directly or indirectly by a cam which opens and closes the contact of the timer.

As an additional note, the present invention connects in parallel a contact that closes when the exhaust temperature or exhaust humidity reaches a predetermined value and a contact whose opening/closing is controlled by a timer cam, and connects this parallel circuit to a timer motor circuit. By connecting the dryer in series with the dryer, it is possible to automatically stop the operation when the clothes are dry.

[Embodiments of the invention]

An embodiment of the clothes dryer according to the present invention will be explained with reference to FIGS. 1 to 5.

Here, FIG. 1 is a control circuit diagram of a drying control means in a clothes dryer according to an embodiment of the present invention, FIG. 2 is a time chart during manual operation, and FIG. Fig. 4 is an explanatory diagram of the relationship between the timer cam and the contact piece when the cam position is stopped in manual operation, and Fig. 5 is a time chart during automatic operation that also shows the exhaust air humidity at the outlet. The P arrow view, FIG. 6 is a sectional view taken along the line E in FIG. 4.

Therefore, in Figures 2 and 3, S indicates the start of operation, E indicates the end of operation, the hatching at Futara indicates that the contact is turned on, and the horizontal axis represents time. It is something.

In other words, 1 is a door switch that opens and closes in conjunction with the opening/closing operation of a door that opens and closes the clothes input port of a clothes dryer with a built-in drying drum, as usual, and 2 opens and closes both poles of the power supply circuit. It is a line cutting system. 2 is a timer for controlling energization to a heater 7 for air heating and a motor 6 for blower fan and drum drive, which will be described later. Motor circumferential contact B consisting of one piece ■-■, timer motor contact C2 and timer motor 3 consisting of contact pieces ■-■
It has a built-in 4 detects the exhaust humidity at the drum outlet, and switches from open to closed when the exhaust humidity decreases to a predetermined value (humidity value when the drying rate reaches a specific value); On the other hand, when the exhaust humidity rises to a predetermined value, D is a humidity-sensitive switch that switches from closed to open. It represents the contact point.

In general, the humidity that changes from open to open,
These are different from the humidity switching from closed to open, and will be explained as the same humidity.

The contacts C and D mentioned above are connected in parallel, and this parallel circuit is connected in series to the timer motor 3 to form a timer motor circuit.

5 is a capacitor for driving a motor, and 6 is a motor for driving a blower fan and a drum (both not shown).

Reference numeral 7 denotes a heater for heating the air, and is configured so that power consumption can be changed by a changeover switch 8. Reference numeral 9 denotes a temperature-sensitive changeover switch that is disposed in the inflow air flow path to the heater 7 and switches from closed to open when the air temperature rises and reaches a predetermined value.

The configuration related to the timer 2 and the humidity sensitive switch 4 is related to the drying control means.

Next, the operation of the device having the above configuration will be explained.

First, if you manually set timer 2 to a predetermined time that is shorter than the maximum time t1, that is, set the cam clockwise at time t1 indicated by the chain line in Figure 4, the results shown in Figures 2 and 4 are shown. As shown, contact A (I[1-1).

B(lft-n), C(1[1-IV) are closed, heater 7, gear 6. The timer motor 3 is energized, and then the contact A is opened for a time t2 before the time t□, and the operation is switched to only air blowing. After the time t2 has elapsed,
All contacts are opened and operation is stopped.

Also, if you turn the knob of timer 2 counterclockwise in the opposite direction to the above and set it by time t3 in Fig. 4, the end of the cam shape that is the same as the previous manual setting will initially be set. , as shown in Figure 4 (when set to automatic operation), first contact points A and B
, C is closed and starts operation, but after time t5 elapses,
Contact C is opened and timer motor 3 is stopped.

As shown in FIG. 3, the exhaust humidity changes as the clothes dry, and decreases as the drying approaches the end, and when it reaches the predetermined values R and HC, the humidity sensitive switch 4 is The contacts are closed and the timer motor 3 is energized.

This energization of the timer motor 3 causes the cam to rotate, and the contact C is closed from the previous position after time t6 has elapsed.

Furthermore, after the time t7 has elapsed, the contact A is opened and the operation is switched to air blowing only, and after the time t8 has elapsed, all the contacts are opened and the operation is stopped. Note that the contact is opened during time t8 when the temperature inside the drum decreases and the humidity increases and reaches a predetermined value RHC. In addition,
In FIG. 3, He is the ambient temperature.

Since the device according to the present embodiment is configured and operates as described above, the present embodiment has the following effects.

(1) With a simple configuration, it is possible to provide a clothes dryer having a drying control means that automatically stops operation when the clothes are dry.

(2) Clothes that dry unevenly due to differences in fabric thickness in some areas may have problems such as having to be dried again if the machine automatically stops under the same conditions as clothes that dry evenly. However, the device according to this embodiment can easily be switched between automatic and manual modes, and is easy to use.

(3) When starting when set to automatic operation,
Warm air operation is performed for only part of the time regardless of humidity. Therefore, if you continue automatic operation after stopping the operation, once the temperature rises and the humidity decreases, the contact will not close and the timer will operate at the end of drying, allowing normal operation. can do. The same applies to cases where the amount of clothing is small and the amount of moisture evaporated into the air whose humidity has decreased due to heating by a heater is small, resulting in a decrease in humidity in a short period of time.

(4) The moisture evaporated from the clothes in the drum is not discharged outside the machine, but is collected as condensed water by passing it through the heat exchanger inside the clothes dryer, and the air is further circulated to the heater. In the dehumidifying type clothes drying and carding machine, the temperature and humidity of the circulating air are not easily affected by the ambient temperature and humidity, so when operated using the drying control means of this embodiment, the effect is particularly high. It is remarkable.

(5) The exhaust humidity detection means shown in this embodiment can be easily attached as an attachment to a clothes dryer equipped with only a manual timer.

However, in the above embodiment, the humidity is detected as the detection means which is activated by detecting the drying of the material to be dried. It is possible to use a detection means related to a temperature-sensitive switch, and with this also, the same effects as in this embodiment can be obtained.

Furthermore, when the ambient humidity RHe is lower than the predetermined value RHC, the contacts are closed in the circuit shown in FIG. 1 and the timer monitor 3 is energized;
-Ic=20~30.1Rf-Ie,
It is highly unlikely that the ambient humidity RI-1,e will be less than the predetermined value RHC, and the circuit shown in Figure 1 is sufficient for practical purposes, but it is recommended to provide a starting switch. Fortunately, all of the above problems can be eliminated.

Furthermore, in the above embodiment, the opening and closing of the contacts are directly controlled by a cam that opens and closes the contacts of the timer.

For example, in order to make the timer more compact, the number of contacts in the timer is reduced and a separate relay is connected to the contact piece operated by the cam. The contact may be indirectly controlled to open or close via the relay, which is configured to operate the relay.

〔Effect of the invention〕

According to the present invention, it is possible to provide a clothes dryer with a simple configuration and a drying control means that automatically stops operation when the clothes are dry, and the invention has excellent practical effects. It can be said that.

[Brief explanation of the drawing]

Fig. 1 is a control circuit diagram of a drying control means in a clothes dryer according to an embodiment of the present invention, Fig. 2 is a time chart during manual operation, and Fig. 3 is an exhaust humidity humidity at the drum outlet. 4th time chart diagram during automatic operation also showing
The figure is an explanatory diagram of the relationship between the timer cam and the contact piece when the cam position is at manual operation stop, Figure 5 is a view in the direction of arrow P in Figure 4,
The figure is a first analysis view taken along the line E in FIG. 4. DESCRIPTION OF SYMBOLS 1...Door switch, 2...Timer, 3...Timer motor, 4...Moisture sensitive switch, 5...Motor drive capacitor, 6...Motor, 7...Heater, 8・
... Selector switch, 9... Temperature-sensitive selector switch, A...
・Heater contact, B...Motor contact, C...Timer motor contact, D...Moisture-sensitive switch contact, ■～■
...Touch piece. BtrJ1 also 5th episode on the 4th

Claims (1)

[Scope of Claims] 1. A timer motor circuit of a timer that controls energization of a heater and a blower fan driving motor in a clothes dryer is connected to a contact point of a detection means that operates upon detecting drying of the drying object; 1. A clothes dryer comprising a drying control means which opens and closes a timer contact through a parallel circuit with a contact whose opening and closing are controlled directly or indirectly by a timer. 2. A clothes dryer according to claim 1, wherein the detection means that detects and operates the drying of the object to be dried is a moisture-sensitive switch or a temperature-sensitive switch.