JP2012080968A - Washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent blood and protein solidified and strongly adhered to the material to be washed by hot washing water when performing a preliminary washing process.SOLUTION: In a washer 10, a cleaning water supply pipe which supplies the washing water to a washing tub 20 comprises: a water supply pipe 28 equipped with a water supply valve 28a; and a hot-water supply pipe 29 equipped with a hot-water supply valve 29a. When performing the preliminary washing process, a control device 40 performs open/close control of the water supply valve 28a and the hot-water supply valve 29a so that water and hot water might be supplied from these water supply pipes 28 and hot-water supply pipe 29 and washing water in the washing tub 20 might become below the predetermined temperature.

Description

  The present invention relates to a washing machine mainly intended for washing medical instruments.

  In Patent Document 1, a cleaning tank that contains an object to be cleaned, a cleaning water supply pipe that supplies hot cleaning water supplied from a water heater into the cleaning tank, and an object that is stored in the cleaning tank are cleaned. A cleaning machine is disclosed that includes a cleaning nozzle that ejects water, a cleaning pump that sends cleaning water in the cleaning tank to the cleaning nozzle, and a drain pump that drains the cleaning water in the cleaning tank. In this washing machine, high temperature washing water supplied from a water heater is supplied into a washing tank through a washing water supply pipe, and this high temperature washing water is sprayed from a washing nozzle onto an object to be washed by a washing pump. After washing, the washing water in the washing tank is drained by a drain pump.

JP-A-6-178750

  The above-described washing machine is a dishwasher intended to wash dishes. In a washing machine intended for washing dishes, it is desirable that the washing water has a high temperature to enhance its detergency. For example, in a washing machine intended for washing medical instruments, the washing water has a high temperature. When washing water is used, blood and proteins may coagulate and adhere strongly, and dirt may not be easily removed from the medical device. Therefore, in a washing machine intended for washing medical equipment, pre-wash with blood at a temperature at which blood and proteins adhering to the medical equipment do not coagulate, and then perform main cleaning with hot water. It is desirable to do. However, in the above-described washing machine, since the washing water supplied to the washing tank is high-temperature hot water supplied from the water heater, it cannot be pre-washed at a temperature at which blood and proteins do not coagulate as described above. . In addition, if normal temperature water is supplied from the tap water to the washing tank, the temperature of the washing water can be set to a temperature at which blood and proteins do not coagulate by pre-washing. In addition, there is a problem that it is difficult to soften other dirt and the cleaning power is reduced. In addition, when normal temperature water is supplied from the tap water to the cleaning tank, the cleaning water has to be heated by a heater when performing the main cleaning, and there is a problem that the time required for cleaning becomes long. The present invention aims to solve such problems.

  In order to solve the above-described problems, the present invention provides a cleaning tank that accommodates an object to be cleaned, a cleaning water supply pipe that supplies cleaning water into the cleaning tank, a detergent supply device that supplies detergent into the cleaning tank, and a cleaning Washing water supplied into the washing tank from the washing water supply pipe, washing nozzle for injecting washing water to the object to be washed contained in the tank, washing pump for sending washing water in the washing tank to the washing nozzle A pre-cleaning process in which the object is cleaned by spraying it from the cleaning nozzle with a pump, and cleaning including detergent by adding detergent supplied from the detergent supply device to the cleaning water supplied from the cleaning water supply pipe into the cleaning tank In the washing machine, the washing water supply pipe is provided with a water supply valve. Equipped with water pipe and hot water supply valve The hot water supply pipe is configured to supply water and hot water from the water supply pipe and the hot water supply pipe so that the cleaning water in the cleaning tank becomes a predetermined temperature or less when the pre-cleaning process is executed. And a hot water supply valve are controlled to open and close.

  In the washing machine configured as described above, the cleaning water supply pipe is composed of a water supply pipe provided with a water supply valve and a hot water supply pipe provided with a hot water supply valve, and the control device supplies these water supply water when performing the pre-cleaning step. Since water and hot water are supplied from the pipe and the hot water supply pipe, and the water supply valve and the hot water supply valve are controlled to open and close so that the cleaning water in the cleaning tank becomes a predetermined temperature or less, heat such as blood and protein is applied to the object to be cleaned. Even if there is dirt that has solidified due to coagulation due to the blood, the pre-cleaning process uses washing water supplied so that the blood and protein are kept at a predetermined temperature or less at which the blood and protein are not coagulated. Cleaning can be performed without strongly adhering to the cleaning object. In addition, since the cleaning water in the cleaning tank is obtained by supplying water and hot water from a water supply pipe and a hot water supply pipe, the temperature can be increased as compared with water-only cleaning water. It is possible to increase the cleaning power by making it easier to soften the adhered and hardened dirt. In addition, even if cold water remains in the hot water supply pipe when the cleaning program is executed, the cooled hot water is sent into the cleaning tank when the pre-cleaning process is executed. Cooled hot water from the hot water supply pipe is not sent into the washing tank. Thereby, it is not necessary to wash | clean using the hot water cooled at this washing | cleaning process, a cleaning power falls, or draining the cold hot water in order to improve a cleaning power.

  In the cleaning machine configured as described above, a water level sensor that detects that the cleaning water in the cleaning tank is equal to or higher than a predetermined water level, and water supplied from the water supply pipe to the cleaning tank detects the predetermined water level by the water level sensor. Water supply flow rate calculating means for calculating and storing the flow rate per unit time from the water supply time until and the unit from the hot water supply time until the hot water supplied from the hot water supply pipe to the washing tank detects the predetermined water level by the water level sensor Hot water supply flow rate calculation means for calculating and storing a flow rate per hour is further provided, and the control device supplies water and hot water from the hot water supply pipe and the hot water supply pipe based on the water and hot water flow rates stored by the water supply flow rate calculation means and the hot water supply flow rate calculation means. It is preferable to control the opening and closing of at least one of the water supply valve and the hot water supply valve so that the amount of water and hot water to be a predetermined ratio. In such a case, an expensive flow rate sensor should be used. Ku, the amount of water and the hot water can be supplied at a predetermined ratio, it can be easily adjust the temperature of the washing water.

  In the cleaning machine configured as described above, the cleaning tank is provided with a tubular joint member that connects the water supply pipe and the hot water supply pipe at the supply port for supplying the cleaning water, and the joint member extends in the axial direction and extends in the pipe. It is preferable to provide a partition portion that is liquid-tightly divided into two passages in a direction orthogonal to the axial direction, and to connect the water supply pipe to one of the two passages and to connect the hot water supply pipe to the other of the two passages. When it does, it can prevent that the water and hot water of a water supply pipe and a hot water supply pipe mutually mix in each channel | path by the joint member of a simple structure. Thereby, even if the water or hot water of each pipe may flow backward, one can be prevented from flowing into the other. In the washing machine configured as described above, it is preferable that the partition portion extends from the supply port to a position protruding into the cleaning tank. In this case, water and hot water in the water supply pipe and the hot water supply pipe are supplied to the supply port. The water is fed into the washing tank without being mixed in the vicinity, and water and hot water from the water supply pipe and the hot water supply pipe can be further prevented from being mixed in the joint member.

  In the cleaning machine configured as described above, it is preferable to provide a guide member for dropping the cleaning water injected into the cleaning tank downward from the horizontal direction on the front side of the supply port of the cleaning tank. Sometimes, the water supplied from the water supply pipe and the hot water supplied from the hot water supply pipe are mixed by changing the direction downward from the horizontal direction, and the washing water mixed with water and hot water is directly applied to the object to be cleaned. Can be prevented. Even when only hot water is supplied from the hot water supply pipe without supplying water from the water supply pipe, it is possible to prevent the high temperature hot water from being directly applied to the object to be cleaned contained in the cleaning tank.

It is the schematic seen from the side of the washing machine by the present invention. (A) It is a perspective view of a saliva duct stand, (b) It is a side view of the saliva duct stand in the state which put the saliva duct. It is a perspective view of a guide member. It is a perspective view of a drainage auxiliary plate. It is a block diagram of a control device It is a flowchart which shows the action | operation of a washing machine. It is a flowchart which shows the washing | cleaning program of the alkaline detergent course in normal mode. It is a flowchart which shows the washing | cleaning program of the alkaline detergent course in a measurement mode. It is a flowchart which shows the washing | cleaning program of the detergent course containing an enzyme in normal mode. It is a flowchart which shows the washing | cleaning program of the detergent course containing an enzyme in a measurement mode.

  Below, the washing machine by this invention is demonstrated with reference to drawings. The cleaning machine 10 according to the present invention is mainly for cleaning medical instruments, and includes a cleaning tank 20 that houses medical instruments (objects to be cleaned) and cleaning water that supplies cleaning water into the cleaning tank 20. Supply pipes 28, 29, cleaning nozzles 24, 25 for injecting cleaning water to the medical instruments accommodated in the cleaning tank 20, and a cleaning pump 27 for sending the cleaning water in the cleaning tank 20 to the cleaning nozzles 24, 25 The detergent supply device 39 for supplying detergent into the washing tank 20 and the washing water supplied into the washing tank 20 from the washing water supply pipes 28 and 29 are sprayed from the washing nozzles 24 and 25 to the medical instruments by the washing pump 27. And a pre-cleaning step for cleaning, and the cleaning water supplied from the detergent supply device 39 to the cleaning water supplied from the cleaning water supply pipes 27 and 28 into the cleaning tank 20 to add cleaning water containing detergent to the cleaning pump 27. Cleaning nozzle 2 , And a control unit 40 for controlling to execute a washing program comprising a main cleaning process for cleaning by spraying the medical device 25. Thus, in this washing machine 10, the washing water supply pipes 28 and 29 are constituted by the water supply pipe 28 provided with the water supply valve 28a and the hot water supply pipe 29 provided with the hot water supply valve 29a, and the control device 40 is pre-washed. When the process is executed, water and hot water are supplied from the water supply pipe 28 and the hot water supply pipe 29 to control the opening and closing of the water supply valve 28a and the hot water supply valve 29a so that the cleaning water in the cleaning tub 20 becomes a predetermined temperature or less. It is characterized by that. Below, this washing machine 10 is explained in full detail.

  As shown in FIG. 1, the cleaning machine 10 includes a cleaning tank 20 in a box-shaped housing 11, and a tank unit 20 a that stores cleaning water is integrally provided below the cleaning tank 20. . A temperature sensor 21 that detects the temperature of the cleaning water is provided at the bottom of the tank 20 a of the cleaning tank 20. A door 22 for taking in and out a rack (not shown) that accommodates medical instruments is provided on the front surface of the cleaning tank 20, and the door 22 is supported by the cleaning tank 20 so as to be rotatable around a lower end by a hinge (not shown). In addition, a door switch 23 for detecting the open / closed state of the door 22 is provided at a position opposite to the upper portion of the door 22 at the upper portion of the cleaning tank 20, and the door switch 23 is turned off when the door 22 is opened. Turns on when the door 22 is closed.

  Cleaning nozzles 24 and 25 for jetting cleaning water are rotatably supported on the upper and lower surfaces of the cleaning tank 20. The cleaning nozzles 24 and 25 are connected to a circulation pipe 26 led out from a tank portion 20 a provided at the lower part of the cleaning tank 20, and a cleaning pump 27 is interposed in the circulation pipe 26. The cleaning nozzles 24 and 25 operate the cleaning pump 27 to inject the cleaning water circulated and supplied from the tank portion 20a through the circulation pipe 26 toward the medical instrument accommodated in the cleaning tank 20 while rotating. Note that the cleaning water sprayed on the medical instrument falls and returns to the tank portion 20a.

  As shown in FIG. 2, the rack (not shown) accommodated in the washing tub 20 supports a salivary duct stand 13 that supports a saliva duct 12 having a large curved portion used for a saliva suction device in dentistry in an upright state. Can be accommodated. As shown in FIG. 2 (b), when the salivary duct 12 is supported in a state of standing on the salivary duct stand 13, the opening 12 a at the upper end of the salivary duct 12 faces upward, and the salivary duct 12 Is inclined downward toward the opening 12b at the lower end. As a result, the washing water sprayed from the upper washing nozzle 24 flows in from the opening 12a at the upper end of the saliva discharge tube 12, and the wash water that flows in passes through the inside of the saliva discharge tube 12 to wash away the dirt, It is discharged from the opening 12b at the lower end without remaining in the tube 12.

  One supply port 20b for supplying cleaning water is provided in the upper rear wall of the cleaning tank 20, and a water supply pipe 28 and a hot water supply pipe 29 constituting a cleaning water supply pipe are tubular in the supply port 20b. Are connected via the joint member 31. The water supply pipe 28 supplies water supplied from a water supply source such as a water supply into the cleaning tank 20 through a water supply valve 28a. The hot water supply pipe 29 supplies hot water supplied from an external hot water heater 30 into the cleaning tank 20 through a hot water supply valve 29a. The hot water heater 30 heats water supplied from a water supply source such as a water supply and sends it as hot water to the hot water supply pipe 29. In the present embodiment, the temperature of the water supplied from the water supply pipe 28 is assumed to be 30 ° C. at the maximum, and the temperature of the hot water supplied from the hot water supply pipe 29 is assumed to be a maximum of 70 ° C.

  The joint member 31 is formed of a rubber tubular joint member. The front end side is connected to the supply port 20b, and the lower end on the rear end side includes inflow pipe portions 31a and 31b connecting the water supply pipe 28 and the hot water supply pipe 29. They are integrally formed side by side in the direction. The joint member 31 is integrally formed with a partition portion 31c extending in the axial direction and dividing the inside of the pipe into two upper and lower passages P1 and P2 in a direction perpendicular to the axial direction. It extends from 20b to a position protruding into the cleaning tank 20. The passages P1 and P2 divided by the partition portion 31c are communicated with the inflow pipe portions 31a and 31b, respectively. The water that flows into the passage P1 from the water supply pipe 28 flows into the passage P2 and is fed into the cleaning tank 20 from the supply port 20b without being mixed with the hot water from the hot water supply pipe 29. The hot water that has flowed into the passage P2 from the hot water supply pipe 29 flows into the passage P1 and is sent into the cleaning tank 20 from the supply port 20b without being mixed with the water from the water supply pipe 28. Moreover, since the partition part 31a of the joint member 31 extends from the supply port 20b to a position protruding into the cleaning tank 20, water or hot water sent from the passage P1 or P2 into the cleaning tank 20 is near the supply port 20b. The washing tank 20 falls without flowing into the passage P2 or P1.

  Further, a guide member 32 is provided on the front side of the supply port 20b of the cleaning tank 20 to guide the cleaning water delivered from the supply port 20b downward from the horizontal direction. As shown in FIG. 3, the guide member 32 has a substantially box shape with an opening 32 a on the lower surface, and hot water or steam that is discharged from the supply port 20 b into the cleaning tank 20 in a horizontal direction. The water is dropped onto the lower tank portion 20a by hitting the front plate. When the water supply and the hot water supply are simultaneously performed, the guide member 32 applies the water and hot water sent in the horizontal direction to the front plate, mixes them, and guides them downward, particularly from the hot water supply pipe 29. This is to prevent high-temperature hot water from being applied to the medical device and causing blood and protein attached to the medical device to coagulate and adhere firmly to the blood. Even when only hot water is supplied from the hot water supply pipe 29 without supplying water from the water supply pipe 28, it is possible to prevent the hot water from being directly applied to the medical device. Further, the guide member 32 is not limited to a substantially box-shaped member having an opening 32a on the lower surface, and the same effect can be obtained even if a tubular member curved downward from the supply port 20b is used. it can.

  A drain pipe 33 is connected to a drain port 20 c formed on the bottom surface of the tank portion 20 a of the cleaning tank 20, and a drain pump 34 is interposed in the drain pipe 33. The drainage pump 34 discharges the cleaning water in the tank portion 20a through the drainage pipe 33 to the outside through the operation. A drainage auxiliary plate 35 is provided above the drainage port 20c of the tank part 20a with a gap. As shown in FIG. 4, the drainage auxiliary plate 35 guides the cleaning water that rises around the drainage port 20 c due to surface tension to the drainage port 20 c and is provided above the circular drainage port 20 c. A square plate portion 35a having a large size and leg portions 35b extending downward from the respective corner portions of the plate portion 35a. The drainage auxiliary plate 35 is positioned by inserting four locking projections 20d protruding around the drainage port 20c into locking holes 35c formed at each corner of the plate portion 35a. In this embodiment, the drainage port 20c has a diameter of 3 cm, the drainage auxiliary plate 35 has a side length of 6 cm, and the leg portion 35b has a length of 7 mm.

  A water level detection tank 36 is connected to the tank portion 20 a of the cleaning tank 20, and a float switch (water level sensor) 37 is accommodated in the water level detection tank 36. The float switch 37 detects that the cleaning water in the tank section 20a of the cleaning tank 20 is equal to or higher than a predetermined water level L required for cleaning. The float switch 37 is turned on when the water level is higher than the predetermined water level L, and is turned off when the water level is lower than the predetermined water level L. Become. In the present embodiment, the amount of water when the cleaning water in the tank 20a reaches the predetermined water level L is 5L. In addition, an overflow pipe 38 is provided in the cleaning tank 20, and the overflow pipe 38 drains cleaning water above the upper limit water level set to a level higher than the predetermined water level L. In the present embodiment, the amount of water when the tank portion 20a reaches the upper limit water level is 7L.

  The cleaning tank 20 is provided with a detergent supply device 39 for supplying detergent. The detergent supply device 39 is detachably mounted with a detergent tank (not shown) that stores detergent, and supplies the detergent in the detergent tank into the washing tank 20. In this washing machine 10, an alkaline detergent or an enzyme-containing detergent containing an enzyme such as protease is used, and an alkaline detergent and an enzyme-containing detergent can be selectively used by exchanging a detergent tank storing these detergents. . In addition, as for the detergent containing an enzyme, the use at 50 degrees C or less is suitable as temperature at which enzymes, such as protease, do not deactivate.

  The washing machine 10 includes a control device 40. As shown in FIG. 5, the control device 40 includes a temperature sensor 21, a door switch 23, a washing pump 27, a water supply valve 28a, a hot water supply valve 29a, a drainage pump 34, A float switch 37 and a detergent supply device 39 are connected. The control device 40 includes a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all not shown) connected via a bus. Based on the temperature detected by the temperature sensor 21, the ON / OFF signal from the door switch 23 and the float switch 37, and the timer timing, the CPU sets the cleaning pump 27, the water supply valve 28 a, the hot water supply valve 29 a, the drainage pump 34, and the detergent supply device 39. The operation is controlled and each cleaning program shown below is executed. The RAM temporarily stores variables necessary for executing each cleaning program, a water supply flow rate, a hot water supply flow rate, and a drainage flow rate per unit time described later, and the ROM stores each cleaning program. The control device 40 is connected to an operation panel 41 provided on the front panel of the housing 11. By operating the operation panel 41, a cleaning program using an alkaline detergent or a cleaning program using an enzyme-containing detergent is selected. It is possible. In addition, the operation panel 41 includes a display unit 41a that displays a remaining time until the cleaning program ends and an error.

  The washing program of the washing machine 10 is a measurement in which washing is performed while measuring the alkaline detergent course in the normal mode, the feed water flow rate per unit time from the feed water pipe 28 and the hot water flow rate per unit time from the hot water supply pipe 29. Measurement of washing while measuring alkaline detergent course in mode, detergent course with enzyme in normal mode, each flow rate per unit time from water supply pipe 28 and hot water supply pipe 29 and drainage flow rate per unit time by drain pump 34 It consists of each washing program of the detergent course with enzyme in mode. Each cleaning program executes a pre-cleaning process, a main cleaning process, and two rinse cleaning processes, and each cleaning process includes a water supply process, a cleaning process, and a waste water process. In the present embodiment, the control device 40 is set to execute the cleaning program for each course in the measurement mode at a rate of once every 10 times while the normal mode cleaning program for each course is being executed. Has been.

  The control device 40 is configured so that the water supplied from the water tank 28a to the tank unit 20a through the water supply pipe 28 when the tank unit 20a of the cleaning tank 20 is empty is detected per unit time from the water supply time until the predetermined water level L is detected by the float switch 37. Supply water flow rate calculation means for calculating the flow rate and storing it in the RAM is provided. Further, the control device 40 determines the unit time from the hot water supply time until the hot water sent to the tank portion 20a through the hot water supply pipe 29 detects the predetermined water level L by the float switch 37 from the empty tank portion 20a of the cleaning tank 20. A hot water supply flow rate calculating means for calculating the hit flow rate and storing it in the RAM is provided. Further, when the cleaning water in the tank portion 20a of the cleaning tank 20 is at the predetermined water level L, the control device 40 drives and drains the drain pump 34 for a predetermined time, and opens the hot water supply valve 29a after draining. The drainage pump 34 was driven for 10 seconds as a predetermined time from the hot water supply time when hot water was supplied from the hot water supply pipe 29 to the tank unit 20a and the hot water flow rate stored in the RAM until the predetermined water level L was detected again by the float switch 37. And a drainage flow rate calculating means for calculating a drainage flow rate per unit time by the drainage pump 34 from the calculated drainage amount and storing it in the RAM. Note that the control device 40 can also calculate the drainage flow rate by supplying water from the water supply pipe 28 instead of the hot water supply from the hot water supply pipe 29 when executing the drainage flow rate calculating means.

  The control device 40 performs control so that the time until each cleaning program is completed is calculated and the remaining time until completion is displayed on the display unit 41a. As described above, each cleaning program executes a pre-cleaning process, a main cleaning process, and two rinse cleaning processes, and each cleaning process includes a water supply (hot water supply) process, a cleaning process, and a drainage process. The time required for the water supply (hot water supply) process in each cleaning process is the time until the predetermined water level L is detected by the float switch 37, and is not constant depending on the flow rate of the water supply pipe 28 or the hot water supply pipe 29. Therefore, the control device 40 calculates the water supply (hot water supply) time of the cleaning water from the water supply flow rate and / or the hot water supply flow rate stored in the RAM as the time required for the water supply (hot water supply) processing of each cleaning process. In addition, the time required for the cleaning process and the drainage process in each cleaning process is a preset time. The time required for completing each cleaning step is the time required for the cleaning water supply (hot water supply) time calculated from the water supply flow rate and / or the hot water supply flow rate stored in the RAM and the preset cleaning process and drainage process. The time until each cleaning program is completed is the time obtained by adding the time required for each cleaning step.

  Next, operation | movement of the washing machine 10 comprised as mentioned above is demonstrated using the flowchart shown to FIGS. In this description, the feed water flow rate per unit time (hereinafter also simply referred to as a feed water flow rate) calculated from the feed water flow rate calculation means described above, and the hot water supply pipe 29 calculated by the hot water supply flow rate calculation means. From the hot water supply flow rate per unit time (hereinafter simply referred to as hot water supply flow rate) and the drainage flow rate per unit time of the drainage pump 34 (hereinafter also referred to simply as wastewater flow rate) calculated by the drainage flow rate calculation means. The description will be made in the stored state.

  As shown in FIG. 6, in step 101, the control device 40 determines whether or not the cleaning course set by the operation panel 41 is an alkaline detergent course. If the cleaning course is set to the alkaline detergent course, “YES” is set. Determine and proceed to step 102. In step 102, the control device 40 determines whether or not the variable n = 9 for counting the number of times of cleaning, that is, whether or not the cleaning program has been executed nine times. The normal mode alkaline detergent course cleaning program defined in step 200 is executed. When the cleaning program for the alkaline detergent course in the normal mode is completed, the controller 40 increments the variable n for counting the number of times of cleaning in step 103 and proceeds to step 108. On the other hand, if the variable n = 9 for counting the number of times of cleaning, the control device 40 determines “YES” in step 102 and cleans the alkaline detergent course in the measurement mode defined in step 300 described later. Run the program. When the washing program for the alkaline detergent course in the measurement mode is completed, the control device 40 clears the variable n for counting the number of washings to 0 in step 104 and proceeds to step 108.

  When the cleaning course set by the operation panel 41 is an enzyme-containing detergent course, in step 101, the control device 40 determines “NO” and proceeds to step 105. In step 105, the control device 40 determines whether or not the variable n = 9. If n = 9, the control device 40 determines “NO” and determines the normal-mode enzyme-containing detergent course defined in step 400 described later. Run the cleaning program. When the washing program for the enzyme-containing detergent course in the normal mode is completed, the control device 40 increments the variable n for counting the number of washings in step 106 and proceeds to step 108. On the other hand, if the variable n = 9, the control device 40 determines “YES” in step 105 and executes the washing program for the enzyme-containing detergent course in the measurement mode defined in step 500 described later. . When the cleaning program for the enzyme-containing detergent course in the measurement mode is completed, the control device 40 clears the variable n for counting the number of cleanings to 0 in step 107 and proceeds to step 108. When each cleaning program ends normally, the control device 40 displays “0”, which is the remaining time until the cleaning program ends, on the display unit 41a of the operation panel 41, and each cleaning program ends normally. If not, the control device 40 displays an error on the display unit 41a.

  In step 108, the control device 40 determines whether or not the door 22 is opened and an off signal is input from the door switch 23. While the control device 40 repeatedly performs the determination of “NO” until an off signal is input from the door switch 23, when the door 22 is opened and an off signal is input from the door switch 23, “YES” And proceeds to step 109. In Step 109, the control device 40 determines whether or not each cleaning program executed in Step 200, 300, 400, or 500 has ended normally. If each cleaning program has ended normally, “YES” is determined. In step 110, the power is turned off and the process ends. As described above, even if each cleaning program is completed normally, the power is not turned off until the door 22 is opened. Therefore, even when the door 22 is closed, the medical instrument in the cleaning tank 20 is not cleaned. You can see if it is later. On the other hand, the control device 40 determines “NO” if each cleaning program has not ended normally, and continuously displays an error on the display unit 41a of the operation panel 41 without turning off the power. In this way, when the cleaning program does not end normally and an error is displayed, even if the door 22 is opened and the medical instrument is taken out without noticing the error display, the error is still displayed. Then, you can notice that the cleaning program has not finished normally by looking at the error display.

  Next, cleaning programs for the alkaline detergent course and the enzyme-containing detergent course in each mode will be described. As shown in FIG. 7, in the alkaline detergent course in the normal mode, the control device 40 uses the water supply flow rate and the hot water supply flow rate stored in the RAM in step 201 to perform the pre-cleaning step, the main cleaning step, and twice. The remaining time until the cleaning program consisting of the rinsing process is completed is calculated and displayed on the display unit 41a of the operation panel 41.

  Next, the control apparatus 40 performs the pre-cleaning process by steps 202-206. In this pre-cleaning process, the control device 40 opens the water supply valve 28a and the hot water supply valve 29a in step 202. Thereby, the water and hot water from the water supply pipe 28 and the hot water supply pipe 29 are sent to the tank part 20a of the washing tank 20, and the water supply process in the pre-cleaning process is started. At this time, the control device 40 controls the operation of the water supply valve 28a and the hot water supply valve 29a so that the amount of hot water supplied from the water supply pipe 28 and the amount of hot water supplied from the hot water supply pipe 29 are equal (predetermined ratio). Specifically, the control device 40 performs control so as to shorten the valve opening time of the water supply valve 28a or the hot water supply valve 29a having the larger flow rate based on the water supply flow rate and the hot water supply flow rate stored in the RAM. As a result, even if the water from the water supply pipe 28 is 30 ° C., which is the maximum temperature assumed, and the hot water from the hot water supply pipe 29 is 70 ° C., which is the maximum temperature, water for the pre-cleaning step The temperature is 50 ° C. or less as the temperature at which blood or protein does not coagulate.

  Next, in step 203, the control device 40 determines whether or not the cleaning water in the tank portion 20 a in the cleaning tank 20 is at a predetermined water level L by the water supply and hot water supply performed in step 202. In step 203, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a becomes the predetermined water level L, the float switch 37. When an ON signal is input from, “YES” is determined, and the process proceeds to step 204. In step 204, the control device 40 closes the water supply valve 28a and the hot water supply valve 29a to end the water supply process.

  Next, in step 205, the control device 40 drives the cleaning pump 27 for 1 minute as a cleaning process in the pre-cleaning process. Thereby, the cleaning water in the tank part 20a is pumped to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 are cleaned by spraying the cleaning water onto the medical instrument while rotating. After the cleaning process, in step 206, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33. At this time, the drainage auxiliary plate 35 can prevent air biting during drainage to reduce drainage sound and reduce the amount of washing water remaining in the tank portion 20a to prevent the washing water in the subsequent main washing process from becoming dirty. Can do.

  When the pre-cleaning process in steps 202 to 206 is completed, the control device 40 executes the main cleaning process in steps 221 to 226. In the main cleaning process, the control device 40 opens the hot water supply valve 29a in step 221. Thereby, hot water from the hot water supply pipe 29 is sent to the tank portion 20a of the cleaning tank 20, and hot water supply processing in the main cleaning process is started. In step 222, the control device 40 determines whether or not the cleaning water in the tank portion 20 a in the cleaning tank 20 is at a predetermined water level L based on the detection by the float switch 37. In step 222, the control device 40 repeatedly determines “NO” until the cleaning water in the tank section 20a reaches the predetermined water level L. While the cleaning water in the tank section 20a becomes the predetermined water level L, the float switch 37 is reached. If an ON signal is input from, “YES” is determined, and the process proceeds to step 223. In step 223, control device 40 closes hot water supply valve 29a and ends the hot water supply process.

  Next, as a cleaning process in the main cleaning process, the control device 40 supplies an alkaline detergent into the cleaning tank 20 by the detergent supply device 39 in step 224, and drives the cleaning pump 27 for 2 minutes in step 225. As a result, the cleaning water containing the alkaline detergent in the tank portion 20a is pumped to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 spray the cleaning water onto the medical instrument while rotating. And wash. After this cleaning process, in step 226, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33. At this time, the drainage auxiliary plate 35 can reduce the amount of cleaning water remaining in the tank portion 20a, and can prevent the cleaning water in the subsequent rinsing cleaning process from becoming dirty.

When the main cleaning process in steps 221 to 226 is completed, the control device 40 executes the rinse cleaning process twice in steps 241 to 246. In this rinsing process, the control device 40 opens the hot water supply valve 29a in step 241. Thereby, hot water from the hot water supply pipe 29 is sent to the tank portion 20a of the cleaning tank 20, and hot water supply processing in the rinsing cleaning process is started. In step 242, the control device 40 determines whether or not the cleaning water in the tank unit 20 a in the cleaning tank 20 is at a predetermined water level L based on the detection by the float switch 37. In step 242, the control device 40 repeatedly determines “NO” until the cleaning water in the tank 20a reaches the predetermined water level L. While the cleaning water in the tank 20a becomes the predetermined water level L, the float switch 37 is reached. If an ON signal is input from, “YES” is determined, and the process proceeds to step 243. In step 243, control device 40 closes hot water supply valve 29a to end the water supply process. Next, in step 244, control device 40 drives cleaning pump 27 for 15 seconds as a cleaning process in the rinse cleaning process. . As a result, the cleaning water in the tank portion 20a is pumped to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 spray the cleaning water onto the medical instrument while rotating to contain the detergent. Wash off the wash water. After the cleaning process, in step 245, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33. In step 246, control device 40 determines whether or not the rinsing process has been executed twice. If not, the control device 40 determines “NO” and executes the processing in steps 241 to 245 described above. . When the rinse cleaning process is executed twice, the control device 40 determines “YES” in step 246 and ends the cleaning program by the alkaline detergent course in the normal mode.

  Next, a cleaning program for the alkaline detergent course in the measurement mode will be described. In this measurement mode, when the cleaning program is being executed, the control device 40 calculates the water supply flow rate and the hot water supply flow rate by the water supply flow rate calculation means and the hot water supply flow rate calculation means, and stores them in the RAM.

  As shown in FIG. 8, in step 301, the control device 40 uses a water supply flow rate and a hot water supply flow rate stored in the RAM to execute a cleaning program including a pre-cleaning step, a main cleaning step, and two rinse cleaning steps. The remaining time until completion is calculated and displayed on the display unit 41a of the operation panel 41.

  Next, the control apparatus 40 performs the pre-cleaning process by steps 302-307. In the alkaline detergent course in the measurement mode, the control device 40 executes the feed water flow rate calculation means in the pre-cleaning process. For this reason, in the measurement mode, the cleaning power in the pre-cleaning process is reduced, but the cleaning water in the pre-cleaning process is cleaned using only water from the water supply pipe 28. More specifically, in this pre-cleaning step, first, in step 302, the control device 40 opens the water supply valve 28a and starts measuring time by a timer. Thereby, the water from the water supply pipe 28 is sent to the tank part 20a of the cleaning tank 20, and the water supply process in the pre-cleaning process is started.

  In step 303, the control device 40 determines whether or not the cleaning water in the tank unit 20 a in the cleaning tank 20 is at a predetermined water level L. In step 303, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a becomes the predetermined water level L, the float switch 37. If an ON signal is input from, “YES” is determined, and the process proceeds to step 304. In step 304, the control device 40 closes the water supply valve 28a and finishes the water supply process after finishing the time measurement by the timer. In step 305, the control device 40 calculates the water supply flow rate per unit time through the water supply pipe 28 from the measured water supply time and newly stores it in the RAM.

  Next, in step 306, the control device 40 drives the cleaning pump 27 for 1 minute as a cleaning process in the pre-cleaning process. Thereby, the cleaning water in the tank part 20a is pumped to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 are cleaned by spraying the cleaning water onto the medical instrument while rotating. After this cleaning process, in step 307, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33.

When the pre-cleaning process in steps 302 to 307 is completed, the control device 40 executes the main cleaning process in steps 321 to 327. In the alkaline detergent course in the measurement mode, the control device 40 executes the hot water supply flow rate calculation means in this main cleaning process. More specifically, in this main cleaning process, in step 321, the control device 40 opens the hot water supply valve 29a and starts timing by a timer. Thereby, hot water from the hot water supply pipe 29 is sent to the tank portion 20a of the cleaning tank 20, and hot water supply processing in the main cleaning process is started. In step 322, the control device 40 determines whether or not the cleaning water in the tank unit 20 a in the cleaning tank 20 is at the predetermined water level L based on the detection by the float switch 37. In step 322, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a reaches the predetermined water level L, the float switch 37. If an ON signal is input from, “YES” is determined, and the process proceeds to step 323. In step 323, the control device 40 closes the hot water supply valve 29a and ends the time measurement by the timer. In step 324, control device 40 calculates a hot water supply flow rate per unit time from hot water supply pipe 29 from the measured hot water supply time and newly stores it in RAM.
Next, as a cleaning process in the main cleaning process, the control device 40 causes the detergent supply device 39 to supply an alkaline detergent into the cleaning tank 20 in step 325, and in step 326, drives the cleaning pump 27 for 2 minutes. As a result, the cleaning water containing the alkaline detergent in the tank portion 20a is pumped to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 spray the cleaning water onto the medical instrument while rotating. And wash. After the cleaning process, in step 327, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33.

  When the main cleaning process in steps 321 to 327 is completed, the control device 40 executes the rinse cleaning process twice in steps 341 to 346 and ends the cleaning program by the alkaline detergent course in the measurement mode. Since this rinsing process is the same as the rinsing process of the alkaline cleaning course cleaning program in the normal mode described in steps 241 to 246 described above, detailed description thereof will be omitted.

  Next, the cleaning program for the enzyme-containing detergent course in each mode will be described. The cleaning program of the detergent course with enzyme mainly controls the temperature of the cleaning water in the main cleaning step so that the enzyme does not deactivate and is 50 ° C. or less. As shown in FIG. 8, in the enzyme-containing detergent course in the normal mode, the controller 40 uses the water supply flow rate and the hot water supply flow rate stored in the RAM in step 401 to perform the pre-cleaning step, the main cleaning step, and 2. The remaining time until the cleaning program consisting of the multiple rinsing steps is completed is calculated and displayed on the display unit 41a of the operation panel 41.

  Next, the control apparatus 40 performs a pre-cleaning process by step 402-406. Since this pre-cleaning process is the same as the pre-cleaning process of the cleaning program for the alkaline cleaning course in the normal mode described in steps 202 to 206 described above, detailed description thereof will be omitted.

  When the pre-cleaning process in steps 402 to 406 is completed, the control device 40 executes the main cleaning process in steps 421 to 432. In the main cleaning process, the control device 40 opens the hot water supply valve 29a in step 421. Thereby, hot water from the hot water supply pipe 29 is sent to the tank portion 20a of the cleaning tank 20, and hot water supply processing in the main cleaning process is started. In step 422, the control device 40 determines whether or not the cleaning water in the tank portion 20 a in the cleaning tank 20 is at the predetermined water level L based on the detection by the float switch 37. In step 422, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a becomes the predetermined water level L, the float switch 37. If an ON signal is input from, “YES” is determined, and the process proceeds to step 423. In step 423, control device 40 closes hot water supply valve 29a.

  In order to prevent the enzyme contained in the detergent supplied from the detergent supply device 39 from being deactivated by the cleaning water in the tank portion 20a, the control device 40 drives the cleaning pump 27 in step 424, and in step 425, the temperature sensor 21 is driven. It is determined whether the detected temperature is 50 ° C. or lower. In the determination in step 425, the control device 40 determines “YES” if the detected temperature of the temperature sensor 21 is 50 ° C. or less, and proceeds to step 430. If the detected temperature of the temperature sensor 21 is higher than 50 ° C., In step 426 to 429, control is performed so that the temperature of the washing water is lowered to a temperature at which the enzyme contained in the detergent is not deactivated. Specifically, in step 426, the control device 40 opens the water supply valve 28a and starts measuring time by a timer. As a result, the temperature of the cleaning water in the tank portion 20a gradually decreases due to the water supply from the water supply pipe 28 while being sprayed from the cleaning nozzles 24 and 25 onto the medical instrument. In this way, by supplying water through the water supply pipe 28 while driving the cleaning pump 27, the temperature of the cleaning water in the tank portion 20a can be made uniform so that the temperature sensor 21 can accurately detect the temperature. Moreover, the enzyme contained in the detergent is prevented from being deactivated by the pre-cleaning treatment due to the medical instrument having heat or the inner wall of the cleaning tank 20.

  In step 427, the control device 40 determines whether or not the temperature detected by the temperature sensor 21 is 50 ° C. or lower. In step 427, the control device 40 repeatedly determines “NO” until the temperature detected by the temperature sensor 21 is 50 ° C. or lower. If the temperature detected by the temperature sensor 21 is 50 ° C. or lower due to water supply, “YES” is determined. And proceeds to step 428. In step 428, the control device 40 closes the water supply valve 28a and ends the time measurement by the timer. In step 429, the control device 40 calculates the water supply amount from the measured water supply time and the water supply flow rate stored in the RAM, and the amount of water until it is drained by the overflow pipe 38 (in this embodiment, from 7L which is the upper limit water level). The drainage time of the drainage pump 34 is calculated from the drainage flow rate stored in the RAM so as to drain the same amount of wash water as the upper limit of 2L) obtained by dividing the predetermined water level L by 5L), The drain pump 34 is driven for the calculated drain time. Thereby, the wash water in the tank part 20a is always controlled to become the predetermined water level L, and the concentration of the detergent when the enzyme-containing detergent is added can be made constant.

  As a cleaning process in the main cleaning process, the control device 40 causes the detergent supply device 39 to supply enzyme-containing detergent into the cleaning tank 20 in step 430, and in step 431 drives the cleaning pump 27 for 5 minutes. As a result, the washing water containing the enzyme-containing detergent in the tank 20a is pumped to the washing nozzles 24 and 25 through the circulation pipe 26, and the washing nozzles 24 and 25 spray this washing water on the medical instrument while rotating. And wash. In this enzyme-containing detergent course, the washing time is set longer than that of the alkaline detergent course so that the enzyme contained in the detergent can function sufficiently. After the cleaning process, in step 432, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33.

  When the main cleaning process in steps 421 to 432 is completed, the control device 40 executes the rinse cleaning process twice in steps 441 to 446 and ends the cleaning program by the enzyme-containing detergent course in the normal mode. Since this rinsing process is the same as the rinsing process of the alkaline cleaning course cleaning program in the normal mode described in steps 241 to 246 described above, detailed description thereof will be omitted.

  Next, the cleaning program for the enzyme-containing detergent course in the measurement mode will be described. In this measurement mode, when the cleaning program is executed, the control device 40 calculates the water supply flow rate, the hot water supply flow rate, and the drainage flow rate per unit time by the water supply flow rate calculation unit, the hot water supply flow rate calculation unit, and the drainage flow rate calculation unit. To remember.

  As shown in FIG. 10, the control device 40 uses a feed water flow rate and a hot water flow rate stored in the RAM in step 501 to execute a cleaning program including a pre-cleaning process, a main cleaning process, and two rinse cleaning processes. The remaining time until completion is calculated and displayed on the display unit 41a of the operation panel 41.

  Next, the control apparatus 40 performs the pre-cleaning process by step 502-507. In the enzyme-containing detergent course in the measurement mode, the control device 40 executes the feed water flow rate calculating means in this pre-cleaning step. Since this pre-cleaning process is the same as the pre-cleaning process of the cleaning program of the alkaline detergent course in the measurement mode described in steps 302 to 307 described above, detailed description thereof will be omitted.

  When the pre-cleaning process in steps 502 to 507 is completed, the control device 40 executes the main cleaning process in steps 521 to 538. In the enzyme-containing detergent course in the measurement mode, the control device 40 executes the hot water supply flow rate calculating means and the drainage flow rate calculating means in this main cleaning step. More specifically, in this main cleaning process, in step 521, the control device 40 opens the hot water supply valve 29a and starts counting by a timer. Thereby, hot water from the hot water supply pipe 29 is supplied to the tank portion 20a of the cleaning tank 20, and hot water supply processing in the main cleaning process is started. In step 522, the control device 40 determines whether or not the cleaning water in the tank portion 20 a in the cleaning tank 20 is at the predetermined water level L based on the detection by the float switch 37. In step 522, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a becomes the predetermined water level L, the float switch 37. If an ON signal is input from, “YES” is determined, and the process proceeds to step 523. In step 523, control device 40 closes hot water supply valve 29a and ends the time measurement by the timer. In step 524, control device 40 calculates a hot water supply flow rate per unit time from hot water supply pipe 29 from the measured hot water supply time and newly stores it in RAM.

  Next, in Step 525, the control device 40 drives the drain pump 34 for 10 seconds. After the processing in step 525, the control device 40 opens the hot water supply valve 29a again in step 526 and starts measuring time with a timer. In step 527, the control device 40 determines whether or not the tank unit 20 a in the cleaning tank 20 is at the predetermined water level L again based on the detection by the float switch 37. In step 527, the control device 40 repeatedly determines “NO” until the cleaning water in the tank unit 20 a reaches the predetermined water level L. While the cleaning water in the tank unit 20 a becomes the predetermined water level L, the float switch 37. If an ON signal is input from, “YES” is determined, and the process proceeds to step 528. In step 528, control device 40 closes hot water supply valve 29a and ends the time measurement by the timer. In step 529, the control device 40 multiplies the measured hot water supply time by the hot water supply flow rate stored in the RAM to calculate the drainage amount executed in step 525, and divides the drainage amount by 10 seconds of the drainage time, thereby discharging the drainage pump. The drainage flow rate per unit time of 34 is calculated and newly stored in the RAM.

  Next, in order to prevent the enzyme contained in the detergent supplied from the detergent supply device 39 from being deactivated by the cleaning water in the tank portion 20a, the control device 40 drives the cleaning pump 27 in step 530, and in step 531 It is determined whether or not the temperature detected by the temperature sensor 21 is 50 ° C. or less. In the determination at step 531, the control device 40 determines whether or not the detected temperature of the temperature sensor 21 is 50 ° C. or lower. If the detected temperature of the temperature sensor 21 is 50 ° C. or lower, “YES” is determined. In step 536, if the temperature detected by the temperature sensor 21 is higher than 50 ° C., it is determined as “NO”, and in steps 532 to 535, the temperature of the washing water is lowered to a temperature at which the enzyme contained in the detergent is not deactivated. To control. More specifically, in step 532, the control device 40 opens the water supply valve 28a and starts measuring time by a timer. As a result, the temperature of the cleaning water in the tank portion 20a gradually decreases due to the water supply from the water supply pipe 28 while being sprayed from the cleaning nozzles 24 and 25 onto the medical instrument. In this way, by supplying water through the water supply pipe 28 while driving the cleaning pump 27, the temperature of the cleaning water in the tank portion 20a can be made uniform and the temperature sensor 21 can accurately detect the temperature. .

  In step 533, the control device 40 determines whether or not the temperature detected by the temperature sensor 21 is 50 ° C. or lower. In step 533, the control device 40 repeatedly determines “NO” until the temperature detected by the temperature sensor 21 is 50 ° C. or lower. If the temperature detected by the temperature sensor 21 is 50 ° C. or lower due to water supply, “YES” And proceeds to step 534. In step 534, the control device 40 closes the water supply valve 28a and ends the time measurement by the timer. In step 535, the control device 40 calculates the water supply amount from the measured water supply time and the water supply flow rate stored in the RAM, and the amount of water until it is drained by the overflow pipe 38 (in this embodiment, from 7L which is the upper limit water level). The drainage time of the drainage pump 34 is calculated from the drainage flow rate stored in the RAM so as to drain the same amount of wash water as the upper limit of 2L) obtained by dividing the predetermined water level L by 5L), The drain pump 34 is driven for the calculated drain time. Thereby, the wash water in the tank part 20a is always controlled to become the predetermined water level L, and the concentration of the detergent when the enzyme-containing detergent is added can be made constant.

  As a cleaning process in the main cleaning process, the control device 40 causes the detergent supply device 39 to supply the enzyme-containing detergent into the cleaning tank 20 in step 536, and in step 537 drives the cleaning pump 27 for 5 minutes. As a result, the washing water containing the enzyme-containing detergent in the tank 20a is pumped to the washing nozzles 24 and 25 through the circulation pipe 26, and the washing nozzles 24 and 25 spray this washing water on the medical instrument while rotating. And wash. In this enzyme-containing detergent course, the washing time is set longer than that of the alkaline detergent course so that the enzyme contained in the detergent can function sufficiently. After the cleaning process, in step 538, the control device 40 drives the drain pump 34 for 30 seconds as a predetermined time for the drain process. Thereby, the wash water in the tank part 20a is discharged out of the machine through the drain pipe 33.

  When the main cleaning process in Steps 521 to 538 is completed, the control device 40 executes the rinse cleaning process twice in Steps 541 to 546 and ends the cleaning program by the enzyme-containing detergent course in the measurement mode. Since this rinsing process is the same as the rinsing process of the alkaline cleaning course cleaning program in the normal mode described in steps 241 to 246 described above, detailed description thereof will be omitted.

  In the washing machine 10 configured as described above, the control device 40 performs the pre-washing process of the washing program of the alkaline detergent course or the enzyme-containing detergent course in the normal mode, and these water supply pipe 28 and hot water supply pipe 29. Since the water supply valve 28a and the hot water supply valve 29a are controlled to be opened and closed so that the cleaning water in the cleaning tank 20 is kept at a predetermined temperature of 50 ° C. or less. Even if there is dirt that adheres strongly due to the heat of blood or protein, the blood or protein is coagulated by the washing water supplied so that the blood or protein does not coagulate in the pre-cleaning process. It can prevent strongly adhering to the object to be cleaned. In addition, since the cleaning water in the cleaning tank 20 is obtained by supplying water and hot water from the water supply pipe 28 and the hot water supply pipe 29, the temperature can be increased as compared with cleaning water containing only water. It is possible to increase the cleaning power by making it easy to soften dirt that has adhered to the appliance. Moreover, even if the hot water remaining in the hot water supply pipe 29 remains when the cleaning program is executed, the cooled hot water is sent into the cleaning tank 20 when the pre-cleaning process is executed, so the main cleaning process is executed. In order to reduce the cleaning power or increase the cleaning power, the hot water that has not been cooled is sent from the hot water supply pipe 29 into the cleaning tank 20 when the hot water is cooled. There is no need to drain cold water. Further, in this washing machine 10, the temperature of the cleaning water is set to a predetermined temperature of 50 ° C. or less by supplying water from the water supply pipe 28 and hot water supply from the hot water supply pipe 29. The cleaning time can be shortened as compared with the case where heating is performed using.

  In the washing machine 10 configured as described above, the control device 40 includes water supplied from the water supply pipe 28 and the hot water supply pipe 29 based on the water and hot water flow rates stored by the water supply flow rate calculation means and the hot water supply flow rate calculation means. Since at least one of the water supply valve 28a and the hot water supply valve 29a is controlled to open and close so that the amount of hot water is an equal ratio, the amount of water and hot water is set to a predetermined ratio without using an expensive flow sensor. It can be supplied at an equal ratio, and the temperature of the washing water can be easily adjusted. When at least one of the water supply valve 28a and the hot water supply valve 29a is controlled to open / close, one of the valves with the larger flow rate may be intermittently controlled to open / close, or may be closed after being opened for a predetermined time.

  Further, the cleaning tank 20 is provided with a tubular joint member 31 for connecting the water supply pipe 28 and the hot water supply pipe 29 to the supply port 20b for supplying the cleaning water, and the joint member 31 extends in the axial direction so that the inside of the pipe extends in the axial direction. It is preferable to provide a partition portion 31c that is liquid-tightly divided into two passages P1 and P2 in a direction orthogonal to the direction of When doing so, the joint member 31 having a simple structure can prevent the water and hot water fed from the water supply pipe 28 and the hot water supply pipe 29 from being mixed with each other in the passages P1 and P2. Thereby, even if the water or hot water of each pipe | tube 28 and 29 may flow backward, it can prevent that one flows in into the other. Further, since the partition portion 31c extends from the supply port 20b to a position protruding into the cleaning tank 20, the water and hot water in the water supply pipe 28 and the hot water supply pipe 29 are not mixed in the vicinity of the supply port 20b, and the inside of the cleaning tank 20 It is possible to further prevent the water and hot water in the water supply pipe 28 and the hot water supply pipe 29 from mixing with each other and flowing back through the pipes 28 and 29.

  In addition, since the guide member 32 for dropping the cleaning water injected into the cleaning tank 20 downward from the horizontal direction is provided on the front side of the supply port 20b of the cleaning tank 20, when water supply and hot water supply are performed simultaneously, Water and hot water delivered in the horizontal direction are applied to the front plate to mix them, and then guided downward. In particular, hot water from the hot water supply pipe 29 is applied to the medical device and applied to the medical device. The attached protein can be prevented from coagulating and sticking to the protein. Further, even when only hot water is supplied from the hot water supply pipe 29 without supplying water from the water supply pipe 28, the hot water sent from the hot water supply pipe 29 is directly applied to the medical instrument accommodated in the washing tank 20. This can prevent the blood and protein adhering to the medical device from coagulating and strongly adhering to the object to be cleaned.

  In the present embodiment, at least one of the water supply valve 28a and the hot water supply valve 29a is controlled to open and close so that the amounts of water and hot water supplied from the water supply pipe 28 and the hot water supply pipe 29 are equal to each other at a predetermined ratio. However, the present invention is not limited to this. For example, in a cold region, the ratio of hot water supplied from the hot water supply pipe 29 is increased, or if the set temperature of the hot water heater 30 is higher than the assumed temperature, the water supply pipe Even if the ratio of water supplied from 28 is increased, the same effect can be obtained.

  In the present embodiment, when each cleaning step of each cleaning program is being executed, the drainage pump 34 is driven for 30 seconds as a predetermined time in order to drain 5 L of cleaning water as drainage treatment. Is not limited to this, and the drainage time stored in the RAM as drainage treatment is used to calculate the drainage time for draining 5 L of wash water at a predetermined water level L, and the drainage pump 34 is used to calculate the drainage. The time may be driven, and in this way, the drainage time without excess or deficiency can be set according to the drainage capacity of the drainage pump 34.

  DESCRIPTION OF SYMBOLS 10 ... Washing machine, 20 ... Cleaning tank, 20b ... Supply port, 24, 25 ... Cleaning nozzle, 27 ... Cleaning pump, 28 ... Water supply pipe, 28a ... Water supply valve, 29 ... Hot water supply pipe, 29a ... Hot water supply valve, 31 ... Joint Member, 31a ... Partition, 32 ... Guide member, 37 ... Water level sensor (float switch), 39 ... Detergent supply device, 40 ... Control device, P1, P2 ... Passage.

Claims (5)

A cleaning tank for storing objects to be cleaned;
A cleaning water supply pipe for supplying cleaning water into the cleaning tank;
A cleaning nozzle for injecting cleaning water onto the object to be cleaned contained in the cleaning tank;
A cleaning pump for sending cleaning water in the cleaning tank to the cleaning nozzle;
A detergent supply device for supplying detergent into the washing tank;
A pre-cleaning step in which the cleaning water supplied from the cleaning water supply pipe into the cleaning tank is sprayed from the cleaning nozzle onto the object to be cleaned by the cleaning pump, and the cleaning water is supplied from the cleaning water supply pipe to the cleaning tank. And a main cleaning step of adding a detergent supplied from the detergent supply device to the cleaning water supplied to the cleaning water and spraying the cleaning water containing the detergent from the cleaning nozzle onto the object to be cleaned by the cleaning pump. In a washing machine equipped with a control device that controls to execute a washing program,
The washing water supply pipe is composed of a water supply pipe provided with a water supply valve and a hot water supply pipe provided with a hot water supply valve,
The control device supplies water and hot water from the water supply pipe and the hot water supply pipe when executing the pre-cleaning step, and the water supply valve and the hot water supply are set so that the cleaning water in the cleaning tank becomes a predetermined temperature or less. A washing machine characterized by controlling the opening and closing of the valve. The washing machine according to claim 1,
A water level sensor for detecting that the cleaning water in the cleaning tank is at or above a predetermined water level;
A water supply flow rate calculation means for calculating and storing a flow rate per unit time from a water supply time until water supplied from the water supply pipe into the cleaning tank is detected by the water level sensor;
A hot water supply flow rate calculation means for calculating and storing a flow rate per unit time from a hot water supply time until hot water supplied from the hot water supply pipe into the cleaning tank detects the predetermined water level by the water level sensor;
The control device sets the amount of water and hot water supplied from the water supply pipe and the hot water supply pipe to a predetermined ratio based on the flow rates of water and hot water stored by the water supply flow rate calculating means and the hot water supply flow rate calculating means. Further, at least one of the water supply valve and the hot water supply valve is controlled to open and close. In the washing machine according to claim 1 or 2,
The cleaning tank is provided with a tubular joint member that connects the water supply pipe and the hot water supply pipe to a supply port for supplying cleaning water,
The joint member includes a partition portion that extends in the axial direction and divides the inside of the pipe into two passages in a direction perpendicular to the axial direction.
The washing machine, wherein the water supply pipe is connected to one of the two passages and the hot water supply pipe is connected to the other of the two passages. In the washing machine according to claim 3,
The said partition part was extended to the position which protrudes in the said washing tank from the said supply port. In the washing machine according to claim 3 or 4,
A cleaning machine, wherein a guide member is provided on the front side of the supply port of the cleaning tank to drop the cleaning water injected into the cleaning tank downward from the horizontal direction.

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