JPS6329698A - Control apparatus of clothing dryer - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a clothes dryer that determines the degree of dryness through temperature detection and determines the end time of operation.

2. Description of the Related Art Conventionally, a control device for a clothes dryer of this kind detects the exhaust temperature TH1 from the drying chamber and the temperature TH2 after this exhaust gas temperature TH1 passes through a dehumidifier, and determines the temperature of both TH1 and TH2. The degree of dryness of the clothes in the drying room was determined by the difference. Normally, as shown in Figure 3, both temperatures TH
1. After the temperature difference of TH2 reaches an equilibrium state, when the degree of dryness approaches about 90 degrees (after T+ time has elapsed), the degree of dryness becomes 100 degrees by taking advantage of the fact that it starts to have a large temperature difference again. As shown in Figure 4, the temperature difference between TH1° and TH2 increases with elapsed time, and the Before the degree of dryness reaches 100%, there is no time to maintain an equilibrium state like in the normal course, and the prediction of the time when the degree of dryness will reach 100% must be considered from other factors.For example, Temperature TH1,
When the difference in temperature of TH2 exceeds a predetermined temperature, it is assumed that there are few clothes in the drying chamber, and the drying operation is forcibly continued for a certain period of time from the time when the temperature reaches the predetermined temperature or higher. There are some methods that attempt to bring the degree of dryness closer to approximately 100%. However, with this configuration, if a special dryness level detection such as a small amount of clothing is to be performed, even if normal dryness detection can be performed at the same time, the sequence will ignore that judgment. As a precaution, many gave priority to special cases when choosing between the two.

Problems to be Solved by the Invention In such a conventional configuration, although the product is equipped with a control device that detects the degree of dryness, the dryness detection performance is not perfect when there is a small number of clothes. There is a problem in that when a special case is determined, even if it satisfies the normal course, it is difficult to establish it.

The present invention solves these problems by, in a method for detecting the degree of dryness, by continuing the subsequent detection even after it has been determined that there is a small amount of clothing. Judging the normal degree of dryness is done in parallel,
The purpose is to establish a more accurate judgment of the degree of dryness.

Means for Solving the Problem In order to solve this problem, the clothes dryer control device of the present invention includes a dehumidifier that cools the exhaust air from the drying room to remove moisture, and a dehumidifier that cools the exhaust air from the drying chamber to remove moisture. a circulating air path for reheating air with a heater and supplying the air to the drying chamber; a first heat-sensitive element for measuring the temperature of the air before passing through the dehumidifier in the circulating air path; a second heat-sensitive element that measures the temperature of the exhaust air after passing through the dehumidifier; and a first dryness degree determination that determines the degree of dryness of the clothes in the drying chamber based on the temperature difference between the gallery heat element and estimates the end time. and a second degree-of-dryness determination unit which, when the temperature difference of the gallery heating element with respect to elapsed time has a large gradient, determines the degree of dryness of the clothes in the drying chamber based on the temperature difference having a large gradient and estimates the end time. The controller is configured to select the shorter one of the two estimated end times by a comparison section of both estimated end times when the estimated end times of the two dryness degree determination sections are different. It is composed of

Function: With this configuration, it is possible to judge the appropriate degree of drying according to the amount of clothes in the drying chamber, and when drying a small amount of clothes, it does not dry more than necessary, which prevents damage to the clothes. Problems such as these can be solved, and energy can be saved.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 4. In FIG. 1, 1.2 is the temperature TH1 of the air exhausted from the drying chamber to the dehumidifier, and the first temperature TH2i for measuring the temperature TH2i after passing through the dehumidifier. This is the second heat sensitive element, and uses the temperature difference between the gallery heat elements 1.2 and the like to control the degree of dryness of the clothes in the drying chamber. The second dryness degree determination units 3 and 4 make the determination. On the other hand, the two end time comparison section 5 compares the length of the L end time estimated by the two row cutting sections 3 and 4.
The controller 6 is in charge of a series of these steps. FIG. 2 shows the positional relationship in the drying chamber of the determination units 5, 6, etc. in FIG. It corresponds to the second heat sensitive element 1.2 and measures the temperature of the exhaust air from the drum 10 installed in the drying box 9.

Reference numeral 11 indicates a dehumidifier, in which the air that has been dehumidified is circulated again into the drying chamber 10 through a vibrator 12 that is a circulation air path.

3 and 4 show the temperature profile of the gallery heating elements 1, 2 over time during the drying process. In contrast to the normal dryness detection (FIG. 3), FIG. 4 shows a special way of changing the temperature when there is a small amount of clothes in the drying chamber.

Since the humidity in the drying chamber 10 is quite high at the beginning of the drying process, the temperature difference between the dynamic heat sensitive elements 1 and 2 is not very different before and after passing through the dehumidifier. (T+ in Figure 3). However, at the end of the drying process or when there is a small amount of clothing in the drying chamber 10, the dehumidifier also has a cooling effect, so the temperature difference between the dynamic heat sensitive elements 1.2 and T2 in FIG. They tend to open wide, as shown in Figure 4. Therefore, if the characteristics shown in FIG.
+, the drying process is forcibly continued for time T3, but conversely speaking, in the case of a small amount of clothing, there is no time T1 period as shown in Figure 3. It is difficult to make a proper judgment, so there is a mandatory delay time T.
3, and if this is an intermediate amount of cloth, a temperature difference of Tar 1 as shown in Fig. 4 may occur, and even in a constant case, the characteristics as shown in Fig. 3 may be exhibited. Therefore, it is not appropriate to determine the end time at Ter 1 in FIG. 4, and it is necessary to detect the drying process using the method shown in FIG. 3. As a reminder, Ter in Figure 4
When a temperature difference of 1 occurs, instead of setting the time until the end of drying in delay mode, one side memorizes the delay time while the other side continues drying detection as shown in Figure 4. It is.

Effects of the Invention As described above, according to the present invention, even in special cases where the normal drying process is not performed, it is possible to perform normal dryness detection, thereby reducing the drying time and the associated electricity costs. You can save money and avoid having to worry about buying clothes that are too big.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a control device for a clothes dryer according to an embodiment of the present invention, Fig. 2 is a block diagram showing the main body of the clothes dryer, and Figs. 3 and 4 show changes in the heat-sensitive element over time. FIG. DESCRIPTION OF SYMBOLS 1...First heat-sensitive element, 2... Second heat-sensitive element, 3... First dryness degree determination section, 4...
... Second dryness degree judgment section, 6... Comparison section, 6.
...Control unit, 11...Dehumidifier, 12...
Pipe (circulation air path). Name of agent: Patent attorney Toshio Nakao (1st person)
figure

Claims (1)

[Claims] A dehumidifier that cools the exhaust air from the drying room and removes moisture;
a circulating air path that reheats the air dehumidified by the dehumidifier using a heater and supplies the air to the drying room; and a first heat-sensitive element that measures the temperature of the air in the circulating air path before passing through the dehumidifier. , a second heat-sensitive element that measures the temperature of the exhaust gas after passing through the dehumidifier in the circulation air path, and a degree of dryness of the clothes in the drying chamber is determined based on the temperature difference between the two heat-sensitive elements, and an end time is estimated. a first degree-of-dryness judgment unit; a first degree-of-dryness judgment unit which, when the temperature difference between the two heat-sensitive elements has a large gradient with respect to the elapsed time, judges the degree of dryness of the clothes in the drying chamber based on the temperature difference having a large gradient and estimates the end time; If the estimated end times of the two dryness degree judgment sections are different, the control section determines which of the two estimated end times is shorter, using a comparison section of both estimated end times. Choose a clothes dryer control device.