JPS5940828A - Electric cleaner - 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 the Invention The present invention relates to a vacuum cleaner with a dust indicator function.

Conventional configuration and its problems Conventional vacuum cleaners are equipped with a dust indicator so that the user can dispose of waste at an appropriate time.

This dust indicator consists of a pipe that communicates with the dust collection container, a pointer that operates inside this pipe, and a coil spring that biases the pointer, and measures the pressure difference between the negative pressure inside the dust collection container and the atmosphere. The pointer operated based on the force relationship between the pressure and the spring pressure, and the dust collection capacity was indicated according to the position of the pointer.

However, the above indicator had two major problems. The first problem is that the operation of the indicator pointer is unstable, making it impossible to accurately judge the dust collection capacity. This is due to variations in the load of the coil spring and the fact that the coil/l/spring rubs against the inner surface of the tube, preventing normal operation. Second, in vacuum cleaners that have been used for a long period of time, small particles of dust get into the indicator tube, impeding the operation of the coil spring and causing a loss of reliability.

OBJECTS OF THE INVENTION The present invention solves these conventional drawbacks, and aims to accurately display the amount of collected dust without using mechanical elements.

Structure of the Invention The present invention is characterized by a vacuum cleaner in which a liquid crystal display section is provided in a part of the vacuum cleaner body that can be visually seen from the outside, and the liquid crystal display section is positioned in an area where air passing through the vacuum cleaner body has a cooling effect. This device uses a liquid crystal display to display changes in the shape of flowing air in response to the amount of dust collected.

Description of examples Examples thereof will be explained below based on FIGS. 1 to 4.

Reference numeral 1 denotes a vacuum cleaner body which integrally has a dust collection chamber 2 and a functional parts chamber 4 containing an electric blower 3 and the like, and the upper opening of the dust collection chamber 2 and the upper opening of the functional parts chamber 4 are covered by lids 6 and 6, respectively. is closed. 7 is a liquid crystal display section, which includes a plurality of liquid crystal panels 7a to 7f.

It consists of a sheet (7.9) whose surface is coated with letters, a reflector 7h, and a base 71, and is fixed in a recess 6a formed in one lid 6. 8 is a heater that heats each of the liquid crystal panels 7a to 7f via the dust collection chamber 2; 9 is a switch beta; 10 is a brake beta that operates the cord winding mechanism;
A lead wire 11 connects the electric blower 3 and the heater 8 in series, and is protected by a lead wire cover 12. Reference numeral 13 denotes a suction port to which a dust collection bag 14 is attached.

When the electric blower 3 is started with the above configuration, dust suction starts from the suction port 13. When dust begins to accumulate in the dust collection bag 14, the intake air volume from the suction port 13 gradually decreases, and when the bag is completely filled with dust, almost no air flows into the dust collection container. . As a result, the wind caused by the intake air initially flows in the direction of the arrow in Figure 3, suppressing the heat generation of the heater 8,
Almost no heat is transmitted to the liquid crystal display section 7, but as the flow of air decreases, the cooling ability of the heater 8 decreases, and the liquid crystal display section 7 gradually heats up.

When the liquid crystal display section 7 is heated, the liquid crystal panels 7a to 7f suitable for the temperature at that time become brighter, and the brightness of the nozzle changes sequentially to display the amount of dust in the dust collection bag 14 described above. It is.

The present invention is currently generally used as a liquid crystal thermometer, and when it senses heat, one of the panels changes color and displays the display, while the other panels have different temperature ranges, so no color change is observed, and initially This will maintain the dark color you set.

Note that if the liquid crystal display section 7 is provided on the exhaust side of the cleaner body 1, the temperature of the exhaust gas can be utilized for display.

That is, when dust accumulates in the dust collection bag 14, the exhaust temperature of the electric blower increases, and accordingly, the temperature of the liquid crystal panels 7a to 7f increases.
senses this exhaust temperature and changes color tone. Since the exhaust air from the electric blower 3 is used, a heater is not required, and an inexpensive and highly reliable product can be obtained.

Furthermore, by expanding the color range of the liquid crystal panel to a range of 80 DEG to 90 DEG C., it is possible to indicate abnormal conditions of the vacuum cleaner, which conventional indicators could not clearly indicate.

In other words, the conditions for using a vacuum cleaner vary, and if the inlet is blocked, the filter is clogged, or the paper bag is full of dust, the winding of the electric blower will malfunction. There is a great danger that heat will be generated and the main body will be thermally deformed, and the indicator using the liquid crystal panel of this embodiment is effective as a means to prevent this from occurring. By making the user fully aware that if the indicator shows a value of 80 degrees or more, something is wrong with the vacuum cleaner, it is possible to prevent dangers such as abnormal heat generation and fire. be.

Effects of the Invention As described above, according to the present invention, there is no variation in operation as with conventional mechanical means, and the amount of collected dust can be displayed with extremely high reliability. This process can maintain good performance of the vacuum cleaner. It can also prevent abnormalities in the vacuum cleaner itself, and can be expected to be effective in terms of safety.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a vacuum cleaner showing an embodiment of the present invention, FIG. 2 is a partially cut-out side view, FIG. 3 is a sectional view of a part of the dust indicator, and FIG. 4 is a perspective view. 1... Vacuum cleaner body, 7... Liquid crystal display section, 7a. yb, 7c, 7d, 7e, 7f---Liquid crystal panel, 8---heater. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (4)

[Claims] (1) A vacuum cleaner in which a liquid crystal display section is provided in a part of the vacuum cleaner body that is visible from the outside, and the liquid crystal display section is positioned in an area where the air passing through the vacuum cleaner body is cooled. (2) The vacuum cleaner according to claim 1, wherein the liquid crystal display section is constituted by a plurality of liquid crystal panels having different coloring temperature ranges. (3) Claim 1 in which a heater is provided in the liquid crystal display section
Vacuum cleaner as described in section. (4) The vacuum cleaner according to claim 1, wherein a liquid crystal display section is provided on the exhaust side of the vacuum cleaner body.