JPS61178084A - Washing machine for instrument - 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 (a) Field of Industrial Use The present invention relates to an instrument washer for cleaning medical and laboratory instruments.

(b) Prior Art For example, Japanese Patent Application Laid-Open No. 54-100159 discloses a fully automatic washing machine in which the time corresponding to each process such as a washing process and a rinsing process is displayed on a display. In addition, you can set the operating time using a mechanical multi-timer or program timer.The temperature of the supplied washing water must be heated to the set temperature before washing 4 times.
Dishwashers designed to start operation are also known,
These timers do not operate until the wash water temperature reaches the set temperature. Therefore, in these dishwashers, the operating time is extended by the time taken to heat the washing water, but the user does not know how long this heating time will be, so the user has the disadvantage that he cannot grasp the actual operating time.

(c) Problems to be Solved by the Invention The present invention obtains an operating time number including the time required for the washing water temperature to reach the set temperature when the temperature of the completely supplied washing water is lower than the set temperature, and calculates the operating time. is displayed to inform the user of the correct driving time.

(d) Means for Solving the Problems The appliance washer of the present invention includes setting means for setting the operating time and cleaning water temperature in the cleaning process and the rinsing process, respectively, and detecting the temperature of the cleaning water supplied to the cleaning tank. a calculation means for calculating in advance an estimated heating time required for the cleaning water temperature to reach the set temperature; the estimated time and the setting;
The first feature is that the temperature detecting means has a display device that displays the total time of the cleaning water, and after a predetermined period of time has elapsed after the cleaning water is supplied to the cleaning tank, the temperature sensing means The second feature is that it detects the temperature of the cleaning water.

(E) Function When the temperature of the supplied washing water is lower than the set temperature, calculate in advance the estimated heating time required to raise the temperature of the washing water to the set temperature, and calculate in advance the estimated heating time that is longer than the set time. is displayed on the display to notify the user. Further, this temperature detection is performed after a predetermined period of time has passed after the supply of the cleaning water and the temperature of the cleaning water has stabilized, thereby accurately detecting the temperature of the cleaning water.

(F) Example (1) is the equipment body of an instrument washer for cleaning medical and laboratory instruments such as flasks and test tubes.The front is closed with a door body (2) that can be opened and closed, and the a cleaning chamber (4) equipped with a cleaning tank (3); and a machine room (7) arranged from the rear of the cleaning chamber (4) downward and covered with a rear plate (5) and a bottom plate 6). In the machine room (7), (8) is a washing pump, (9) is a drain pump, and (1) is a washing pump.
0) is an overflow pump, (11) is a control circuit unit that controls these, and the suction ports of the cleaning pump (8) and drain pump (9) are connected to the filter storage recess connected below the cleaning tank (3). (12), and is further connected to a drainage pump (9) and an overflow pump (10).
) are connected to the drain pipes (13a) (13b) and the reverse valve (
14) to the outside of the machine, and the suction port of the overflow pump (10) communicates with an overflow port (15) in the cleaning chamber (4). (16) is a water level switch room that detects the specified water level, overflow water level, and low water level of the wash water. (17) and (18) are water supply pipes and hot water supply pipes for supplying water and hot water into the cleaning chamber (4), and are equipped with a water supply control valve (19) and a hot water supply control valve (20). Furthermore, (21a) and (21b) are solvent storage boxes which are bypassed from the water supply control valve (19) and the hot water supply control valve (20) and communicated with the cleaning chamber (4), and contain detergents, finishing agents, disinfectants, etc. Stores neutralizing agents, etc.

The control circuit unit (11
), and the control section (22) includes a power switch (23).
A keyboard (24), a display board (25), and a display board (25) are arranged in different directions, and the door body (2) has a glass window (26) in the center thereof for checking the inside.

In the cleaning chamber (4), (27) is a filter cage, (28) is a sheathed water heater, (29) is a lower nozzle bearing that communicates with the discharge port of the cleaning pump (8), (
30) is a vibrator (
31), and a lower rotary jet nozzle (32) and an upper rotary jet nozzle (33) are rotatably loosely inserted into these nozzle bearings (29) and (30), respectively. ing. And these jet nozzles (3
2) (33) is a rotating spout hole (34) drilled on the side.
The cleaning object is rotated by the cleaning water jetted from the nozzle, and the object to be cleaned is cleaned by the cleaning water jetted from the upper jetting hole (35) or the lower jetting hole (36) formed in the upper or lower surface of the nozzle.

(37) is an instrument rack for mounting and holding objects to be cleaned (A) such as medical/experimental instruments such as flasks and test tubes. ) is installed upward from a hollow base (39) made of a vibrator, and furthermore, a small diameter rod-shaped nozzle pipe (38) that is loosely inserted into A wash water socket (40) is provided on the bottom.

The instrument rack (37) is stored in the washing room (4) along the rail (41) of the washing room (4) so that it can be freely moved in and out of the washing room (4). It is located above the side nozzle bearing (29). Further, (42) is a synthetic resin instrument holder on which the object to be cleaned (A) is placed.

(43) is a water cylinder that is installed in and out of the lower nozzle bearing (29) and supplies cleaning water to the instrument rack (37), and normally enters the lower nozzle bearing (29) and performs cleaning operation. During cleaning and rinsing operations, the cleaning pump (
8) is increased by the pressure of the cleaning water caused by the instrument rack (3).
7) is connected to the wash water inlet (40>).

Further, the keyboard (24) is composed of key switches as shown in FIG. 1(A), (44) is a start/stop switch, (45) is a write switch,
6) is a fast forward switch, (47) is a program switch, (48) is a recall switch, (49) is "0" to r9
The numeric switch (50) consisting of j is a selector switch that sets the contents of each step of the program and calls each set value, and the time switch (51) and temperature switch (50).
2), rinse switch (53) and pause switch (5
4) and a detergent 1.2 switch (for adding detergent etc.)
55) (56), a batch/over switch (57) for switching between batch cleaning (rinsing) and overflow cleaning (rinsing), and a drain switch (58).
The display board (25) also has a 4-digit digital display (59) that displays operating time (2 digits on the left), temperature (2 digits on the right), etc., as shown in Figure 1 (B), and 5 digital displays. Number of times display lamp (6
Rinsing frequency display section (60
), an operation status display section (61) consisting of five operation display lamps (61a) to (61e), and a stroke display section (62) consisting of seven stroke display lamps (62a) to (62g).
By operating this keyboard (24), the number of pre-washes in the washing process can be set from 0 to 3.
The number of rinsing steps can be set between 0 and 9 times, and the presence or absence of a pure water rinsing step and drying step can be set arbitrarily, and the operating time in the washing (rinsing) step can be set between 0 and 99 times.
The washing (rinsing) water temperature is between 0 and 99°C for a period of minutes.
In addition, the cleaning (rinsing) method should be either batch cleaning (rinsing) [washing (rinsing) with washing water stored] or overflow washing (rinsing) [washing (rinsing) while washing water overflows]. Whether or not detergent, finishing agent, etc. are added can be set arbitrarily, and the operating time in the drying process can be set arbitrarily between 0 and 99 minutes, and the temperature can be arbitrarily set between room temperature and 120°C.

Figure 4 is a schematic block diagram of the circuit configuration, where (63) is an alarm device such as an alarm buzzer, (64) is a setting changeover switch, and this changeover switch (64) is the same printed circuit board for multiple types of models. It is installed on the printed circuit board to switch circuit capabilities depending on the model in order to enable use of the device. Kirani (65) is the power supply circuit, (66
) is a microcomputer that includes a central processing unit, storage unit, and input/output unit, (67) is a digital/analog humbator (6g), a comparator (69), a resistor (70), and a thermistor for cleaning temperature detection (71). ), (72) is an overflow switch, (73)
(74) is a standard water level switch, and (74) is a low water level switch. (75) is the heater control relay and its contact (75a)
(76) is a cleaning pump control relay whose contacts (76a) control the energization of the cleaning pump (8), and (77) is a valve control relay whose contacts (77a) The water supply control valve (
19) and hot water supply control valve (20),
(78) is a drainage control relay, whose contacts (78a) control the energization of the drain pump (9), and (79) is an overflow control relay, whose contacts (79a>) control the energization of the overflow pump (10). Let's do it.

Then, the memory section of the micro pump unit (66) includes the washing process, the rinsing process, and the drying process.
A series of programs are stored that operate according to the operating time and operating conditions entered into the keyboard (24) within the capacity set by the setting changeover switch (64), among which the estimated heating time ( (described later), display of required time (described later), and error correction will be explained based on FIGS. 5 and 6.

FIG. 5 is a flowchart of the main parts of the cleaning process and the rinsing process of this embodiment. As shown in the figure, a temperature settling period in the cleaning chamber (3) is provided for a predetermined time (1 minute) after the cleaning water is supplied. . During this period, the heater (28) is turned on when the cleaning water temperature is lower than the set temperature. After the predetermined time (1 minute) has elapsed, when it is determined that the cleaning water temperature is lower than the set temperature, the estimated heating time is obtained by estimating the time required to reach the set temperature as shown below. The estimated time of 1 hour and the set time are totaled to obtain the required time, and this required time is displayed on the digital display section (59) of the display board (25).
to notify the user of the actual driving time.

The estimated heating time is calculated as follows. That is, FIG. 7 shows the relationship between the energization time of the heater (28) and the temperature of the cleaning water in the cleaning tank (3).

Based on this relationship, the cleaning water temperature and the corresponding heater energization time are plotted for each 1°C and stored in advance in the storage section of the microcomputer (66) as table data or as an approximation of this relationship.

The above approximate formula is t-A-T+B-T'' where the cleaning water temperature is T (℃), the boiling time from 0℃ to T'C is t (win), and the coefficients are A and B. , B with the setting changeover switch (64), the same printed circuit board can be used for different types of appliance washers (different cleaning capacities).

As the cleaning process or rinsing process progresses, the required time is subtracted and displayed on the digital display (59), but as shown in FIG.
) There are differences in the degree of rise in the temperature of the washing water depending on the operating level and the amount of items to be washed. For example, the estimated heating time to heat up to 70°C is about 3 times at a high water flow compared to the standard water flow.
3 minutes longer at low water levels. Therefore, in this embodiment, if the set temperature is reached before the estimated heating time, cleaning or rinsing operation is performed for the set time from the time of reaching the estimated heating time, whereas if the set temperature is not reached at the estimated heating time, the new required time is and display the required time.

Furthermore, Fig. 6 shows a flowchart of another embodiment that can deal with the so-called heater failure, when the cleaning water temperature does not rise to the set temperature due to heater breakage, etc. This is also clear in the figure. As shown, the defect determination period is set as (estimated heating time + 10 minutes), and if the cleaning water temperature does not reach the set temperature within this defect determination period, it is determined that the heater is defective, and the output is turned off and the alarm (63) is activated. The process for causing the problem is added to Fig. 5.

(G) Effects of the Invention According to the present invention, the required time including the heater heating time is estimated in advance based on the temperature of the supplied washing water, instead of the set time set by the user in the washing process and the rinsing process. Since this required time is displayed, the user can accurately know the actual driving time.

Further, the temperature detection means for detecting the supply temperature of the cleaning water detects the cleaning water temperature after a predetermined period of time has passed after the supply of the cleaning water is finished, so that the temperature of the cleaning water can be detected accurately. Accurate estimated heating time can be obtained and more accurate actual operating time can be known.

[Brief explanation of drawings]

The drawings all relate to embodiments of the utensil washer of the present invention; Fig. 1 is a front view of the main parts, (a) is a front view of the keyboard, and (b) is a front view of the keyboard.
is a front view of the display board, FIG. 2 is a cross-sectional side view of the cleaning state, FIG. 3 is a front view, FIG. 4 is a schematic circuit block diagram, and FIG.
A) (B) is a flowchart of the main part of the cleaning (rinsing) process, and Figure 6 (A) and (B) are cleaning (rinsing) of other embodiments.
FIG. 7 is a flowchart of the main part of the process, FIG. 7 is a cleaning water temperature-heater heating time characteristic diagram, and FIG. 8 is a sectional view of the water level switch chamber. (24)...Keyboard, (3)...Cleaning tank, (7
1)...Thermistor, (66)...Microcomputer, (25)...Display board.

Claims (2)

[Claims] (1) Setting means for setting the operating time and washing water temperature in the washing process and the rinsing process, respectively, a temperature detection means for detecting the temperature of the washing water supplied to the washing tank, and the washing water temperature is set to the set temperature. A utensil washer comprising: a calculation means for calculating in advance an estimated heating time required to reach the desired heating time; and a display for displaying a total time of the estimated time and the set time. (2) The appliance washing machine according to claim 1, wherein the temperature detection means detects the temperature of the washing water after a predetermined period of time has passed after the washing water is supplied to the washing tank.