JPS6397198A - Washing machine - 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] (b) Industrial application fields The present invention relates to a washing machine.

-) Prior Art Conventionally, a washing machine equipped with an automatic detergent dosing device and capable of automatically adjusting the amount of detergent dispensed according to the set water level in the washing tub was disclosed in Jikkosho/, No. 0-33910 ( DO6F
39102).

That is, even for the same amount of laundry, the concentration of detergent varies depending on the amount of water used, so the larger the amount of water, the greater the amount of detergent.

However, the cleaning power of a washing machine depends not only on the concentration of the detergent liquid, but also on the temperature of the liquid used; the higher the water temperature, the higher the cleaning power.

Therefore, even if the amount of water is the same, it is necessary to change the amount of detergent added depending on the water temperature.

1) Problems to be Solved by the Invention The washing machine of the present invention automatically changes the amount of detergent added so that a uniform washing effect can always be obtained.

(i) Means for solving the problems The washing machine of the present invention comprises a washing tub, a means for introducing detergent into the washing tub, a water level detecting means and a water temperature detecting means in the washing tub, the water level detecting means, and The apparatus further includes a control means for instructing the detergent injection means to change the detergent injection operation time based on the respective signals from the water temperature detection means.

(e)) Effect: The higher the water level (the larger the amount of water) and the lower the water temperature, the larger the amount of detergent to be added.

b) Examples Embodiments of the present invention will be described based on the drawings.

In Figure 2, (1) is the machine frame, and (2) is the machine frame (1).
The operation section (3) is installed at the rear of the upper part of the machine frame (1).
), (4) is an inner tank installed inside the outer tank (3) and has dewatering holes (5) around the periphery, and (6) is the bottom of the inner tank (4). (7) is a drive motor connected to the inner tank (4) and the rotor (6) via a power transmission mechanism (8); (9) is the outer tank (3); It is an air trap provided at the bottom corner of the operating section (2).
) is connected to the pressure switch U■ in ) via a pressure hose 01). The operating point of the pressure switch (Ill) can be set in four stages (low water level, low water level, medium water level, high water level) using the operating knob (not shown) of the operating part (2), 4) Detects when the water level of (outer tank (3)) reaches the set value and outputs a signal. 121 is a drain port;
(131 is a drainage solenoid valve installed in the drainage channel (14), (I
51 is a water supply solenoid valve provided in the water supply channel 061.

0'71 is a detergent injection device, and as shown in FIG. 3, a detergent liquid storage tank (191) can be detachably stored inside the case marked 0.
91 is formed with an outlet port that is blocked by a check valve, and when the tank 09) is installed, it comes into pressure contact with the connection port (2t+) formed at the bottom of the case ball, and at the same time the check valve is closed. When opened, detergent (hereinafter referred to as liquid detergent in this embodiment) is delivered from a connection port (21) that is a delivery port.Furthermore, the connection port (21) is connected to the inner tank (4). A hose is connected to the hose, and a pump device (not shown) is interposed in the hose.The pump device is driven to draw out the detergent liquid into the inner tank (4). A safety switch for driving the pump device, which closes when the tank (1g) is installed, is connected to the tank (19).
) is a float switch for liquid level detection.

An example is a negative characteristic thermistor installed in the air trap (9), and the thermistor C4) is used to construct a temperature detection circuit as shown in FIG.

That is, the resistance value of the thermistor (2) changes depending on the water temperature (air temperature), and the voltage determined by the resistance value of the thermistor (2) and the voltage divided by various resistors are determined by the comparator ) ノ) Compare. This comparison output is input to the input ports P1, Pz, Ps, and Ps of the microcomputer (referred to as F microcomputer), and the microcomputer mark) is the signal input to each input port as shown in Table 1. Based on conditions, water temperature (air temperature)
Determine the rank of.

Table 1 Here, if the water temperature rank is determined to be X or D rank, since the water temperature is not normally used for washing, the buzzer is immediately sounded to notify of an abnormality.

FIG. 5 shows a block circuit diagram of the control mechanism, in which the microcomputer (a) plays a central role in control. The microcomputer (2) includes a group of various operation switches (C31), a safety switch (2) linked to the opening and closing of the top lid, the pressure switch (00), the temperature detection circuit), the safety switch for the pump device, and the float switch for detecting the amount of detergent. Based on the information from the driver), the left and right rotation drive circuits c(3) and c(41
, supply and drain solenoid valve drive circuit cfIl■, buzzer circuit (support), various display circuits consisting of various light emitting diode groups■
, controls the operation of the pump motor drive circuit constituting the pump device.

FIG. 6 briefly shows the configuration of the microcomputer (A).
It consists of an OM143, a timer, a system bus, and an input/output board (451■.The CPU■ consists of a control section (4η) and a calculation section (machine),
47) takes out and executes instructions, and the arithmetic unit (c) performs binary addition, It performs arithmetic processing such as logical operations, increase/decrease, and comparison.The RAM (411) is for storing data related to the washing machine, and the ROMp
In this method, the means for operating the washing machine, the setting of conditions for judgment, the rules for processing various information, etc. are loaded in advance.

The operation based on such a configuration will be explained according to the flowchart of FIG.

When the program start switch is operated, water is supplied into the tank up to the set water level. Next, the microcomputer (2) determines the water temperature rank based on the signal from the temperature detection circuit (Temperature Detection Circuit, Inc.), and uses the determined water temperature rank and the currently set water level to select the pump as shown in Table 2. Set the drive time of the motor drive circuit [with]. Table 2 In other words, the lower the water temperature and the higher the set water level (larger amount of water), the more detergent is required, so the driving time is determined taking both of these conditions into consideration.

In addition, the numerical value below each drive time in the table shows the amount of detergent put in by driving for each time.

When the microcomputer (support) sets the drive time t, it drives the pump motor drive circuit for this time (t) to dispense an appropriate amount of detergent.

As described above, in this embodiment, an appropriate detergent injection operation can be performed according to the water temperature and water level (water amount), and the driving time t may be adjusted as appropriate depending on the capacity of the washing machine and the type of detergent.

In addition to this embodiment, the detergent dispensing device may be one that dispenses detergent one unit at a time by reciprocating a cylinder, for example, and powder detergent can also be used with such a configuration.

(G) Effects of the Invention The washing machine of the present invention automatically determines the appropriate amount of detergent to be added based on both the water temperature and water level (wax), so the washing machine always
A uniform cleaning effect can be obtained with the detergent.

[Brief explanation of the drawing]

Figures 1 (a) to (a)) are flowcharts showing the detergent loading operation of the washing machine of the present invention, Figure 2 is a cross-sectional view of the internal mechanism of the same, and Figure 6 (a) is a front perspective view of the detergent loading device. , the same figure (
4 is a temperature detection circuit diagram, and FIGS. 5 and 6 are block circuit diagrams of the control mechanism. (4)...Inner tank (washing tub), 001...Pressure switch (water level detection means), ■...Temperature detection circuit (water temperature detection means), (a)...Microcomputer (controlling means) ), (support)...Pump motor drive circuit (detergent injection means).

Claims (1)

[Claims] (1) A washing tub, a means for introducing detergent into the washing tub, a water level detecting means and a water temperature detecting means in the washing tub, and a means for detecting the detergent based on the respective signals from the water level detecting means and the water temperature detecting means. 1. A washing machine comprising: control means for instructing the detergent injection means to change the detergent injection operation time.