JP2013005943A - Washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid splashing water onto objects to be washed when water is supplied to a reservoir before draining waste water from a hot water sterilization process, in order to prevent a water draining system from deterioration by the heat of hot water.SOLUTION: A washing device 10 includes a washing tank 20 to accommodate medical instruments above a water reservoir 21 to store washing water at the bottom, a washing water supply means 28 for supplying water from its source to the reservoir 21 as a part of the washing water through a supply port 20a formed on the inner circumferential wall of the washing tank 20, a hot water supply means 40 for supplying hot water to the reservoir 21, washing nozzles 24, 25 to jet the washing water from the reservoir 21 to medical instruments, a washing pump 27 to send the washing water of the reservoir 21 to the washing nozzles 24, 25, and a drainage pipe 34 provided near a drainage pump 35 as a means for draining the washing water. The washing tank 20 includes a guide nozzle 31 and a guide plate 32 as a water guide means that prevents the water supplied into the washing tank 20 through a supply port 20a from scattering to the side of objects to be washed that are placed within the washing tank 20, and guides it into the reservoir 21.

Description

  The present invention relates to a cleaning apparatus mainly for cleaning medical instruments, and more particularly to a cleaning apparatus that disinfects medical instruments with hot water.

  Patent Document 1 discloses a cleaning tank that stores objects to be cleaned such as tableware and stores cleaning water in a lower portion, a hot water heater that heats raw water fed from a water supply source, and a high-temperature rinse heated by the hot water heater. There is disclosed a washing machine including a tank for storing water, a rinsing pump for supplying rinsing water from the tank to a washing tank, and a rinsing nozzle for injecting rinsing water pumped by the rinsing pump toward an object to be washed. . In this washing machine, after the main washing process for washing the object to be washed, as a rinsing washing process, the rinsing water heated to around 85 ° C. by a hot water heater and stored in the tank is rinsed from the rinsing nozzle into the washing tank by the pressure of the rinsing pump. It is sprayed on the object to be cleaned.

  In Patent Document 2, a cleaning tank that includes ultrasonic transmission means and accommodates a tubular object to be cleaned, a water supply pipe that supplies water sent from a water supply source as cleaning water into the cleaning tank, and a hot water supply source Hot water supply pipe for supplying the hot water to be washed into the washing tank, a heater provided at the lower part of the washing tank for heating the washing water, a washing pump for circulating the washing water in the washing tank, and the washing tank A cartridge for connecting cleaning water to a pipe of a tubular object to be cleaned accommodated therein, a suction tank for sucking cleaning water in the cleaning tank from a suction path connected to the cartridge, and a negative pressure in the suction tank A medical device cleaning device including a suction pump is disclosed. In this cleaning apparatus for medical devices, in the pre-cleaning process, water to be cleaned such as a suction tub is cleaned using the water supplied from the water supply pipe as cleaning water, and in the main cleaning process, it is supplied as cleaning water from the hot water supply pipe. Add detergent to the hot water and use the cleaning water containing this detergent to clean the objects to be cleaned such as suction pipes. In the rinsing process, use the hot water supplied from the hot water supply pipe as cleaning water. In the hot water treatment process, the object to be cleaned such as the suction pipe is sterilized with the cleaning water heated to 93 ° C. by the heater.

Japanese Patent Laid-Open No. 5-261504 JP 2010-115223 A

  In the washing machine of the above-mentioned Patent Document 1, as an rinsing washing step, an object to be washed is rinsed and washed using high-temperature rinsing water heated to around 85 ° C. If the high temperature rinsing water used in the rinsing process is drained as it is, the drainage pipes constituting the drainage passage and the opening / closing valve for opening / closing the drainage pipes may be deteriorated by the high temperature rinsing water.

  Further, in the above-described cleaning device of Patent Document 2, similarly to the cleaning device of Patent Document 1, when the high-temperature cleaning water used in the hot water treatment process is drained as it is, the drain pipe that constitutes the drain path and this are opened and closed. There was a possibility that the on-off valve might be deteriorated by hot washing water. In order to prevent this, for example, if the water of the water supply source is supplied into the washing tank before draining and the temperature of the hot washing water is lowered by the water, the drain pipe and the on-off valve for opening and closing the drain pipe are heated. It becomes difficult to be deteriorated by washing water. However, when water from the water supply source is supplied into the cleaning tank, this water may be applied to the object to be cleaned that has been disinfected with hot water using hot cleaning water. There was a risk that the water was deprived of the remaining heat from the hot water by this water, and the object to be cleaned could not be dried by the remaining heat from the hot water. The present invention aims to solve such problems.

  In order to solve the above-mentioned problem, the present invention has a water storage part for storing cleaning water at the lower part, a cleaning tank for storing an object to be cleaned on the upper side of the water storage part, and a water supply port formed on the inner peripheral wall of the cleaning tank. Washing water supply means for supplying water from the water supply source to the water storage section as at least a part of the cleaning water, hot water supply means for supplying hot water to the water storage section, and cleaning water for the water storage section in the object to be cleaned contained in the cleaning tank A cleaning nozzle for injecting water, a cleaning pump for sending the cleaning water from the water storage section to the cleaning nozzle, and a drainage means for draining the cleaning water from the water storage section. The cleaning water from the cleaning nozzle is cleaned by the cleaning pump. A washing process in which the washing water is discharged from the drainage means after washing, and the hot water supplied to the water storage section by the hot water supply means after the washing process is jetted from the washing nozzle to the object to be washed by the washing pump. Then disinfect the hot water, A cleaning device that performs a hot water disinfection process in which hot water used for hot water disinfection is drained from the drainage means after supplying water from the water supply source to the water storage unit by the cleaning water supply means, The present invention provides a cleaning device provided with guide means for preventing water supplied from a water supply port from being scattered to the object to be cleaned accommodated in a cleaning tank and guiding it to a water storage section.

  In the cleaning apparatus configured as described above, the hot water used for hot water disinfection is drained from the drainage means after supplying water from the water supply source to the water storage section by the cleaning water supply means after the hot water disinfection. Since the cleaning tank is provided with guide means for preventing the water supplied from the water supply port from being scattered on the side of the object to be cleaned housed in the cleaning tank and guiding it to the water storage section when it is difficult to be deteriorated by heat. The object to be cleaned, which has been sterilized with hot water, will not be deprived of residual heat by the water supplied from the water supply port. In this way, in order to make it difficult for the drainage means to deteriorate due to the heat of the hot water, even if the water from the water supply source is supplied from the water supply port to the water storage part before draining the hot water disinfection process, When removed from the tank, the object to be cleaned can be immediately dried by the residual heat.

1 is a schematic view of a cleaning apparatus according to the present invention. It is a front view of the state which opened the door of the washing | cleaning apparatus. It is a sectional side view mainly in a cleaning tank of a cleaning device. It is a block diagram of a control device It is a flowchart which shows the action | operation of a hot-water supply apparatus. It is a flowchart which shows the washing | cleaning program of the alkaline detergent course of a washing | cleaning apparatus.

  Hereinafter, a cleaning apparatus according to the present invention will be described with reference to the drawings. The cleaning device 10 according to the present invention is mainly for cleaning medical instruments. As shown in FIG. 1, the cleaning device 10 has a water storage portion 21 for storing cleaning water at a lower portion, and a medical device above the water storage portion 21. A cleaning tank 20 for storing an object to be cleaned such as an instrument, and a water supply pipe (cleaning) that supplies water as a water supply source to at least a part of the cleaning water from a water supply port 20a formed in the inner peripheral wall of the cleaning tank 20 to the water storage unit 21 Water supply means) 28, a hot water supply pipe 29 for supplying hot water from the water heater 30 as at least part of the cleaning water to the water storage unit 21 from the hot water supply port 20 b formed in the inner peripheral wall of the cleaning tank 20, and hot water to the water storage unit 21 Hot water supply device (hot water supply means) 40 for supplying water, cleaning nozzles 24 and 25 for injecting the cleaning water of the water storage unit 21 to the medical instrument accommodated in the cleaning tank 20, and the cleaning nozzle for cleaning the water of the water storage unit 21 Cleaning pump to be sent to 24, 25 27, and a drainage pipe 34 to the drainage pump 35 is interposed as a drainage means for draining the washing water in the reservoir 21.

  In this cleaning device 10, as a cleaning process (pre-cleaning process, main cleaning process, and rinsing cleaning process), cleaning water supplied to the water storage unit 21 from at least one of the water supply pipe 28 and the hot water supply pipe 29 is supplied by the cleaning pump 27. After washing, the washing water is drained from the drain pipe 34 by the drainage pump 35 and is supplied by the hot water supply device 40 as a hot water disinfection process after the washing process. Hot water is sprayed from the cleaning nozzles 24 and 25 onto the medical device by the cleaning pump 27 to sterilize the hot water. After the hot water is sterilized, the hot water used for the hot water sterilization is supplied to the water storage unit 21 through the water supply pipe 28. The drain pump 35 is controlled to drain from the drain pipe 34. Thus, in the cleaning tank 20 of the cleaning device 10, a guide that guides the water storage unit 21 while preventing the water supplied from the water supply port 20 a from being scattered to the medical instrument housed in the cleaning tank 20. As a means, a guide nozzle 31 and a guide plate 32 are provided. Hereinafter, the cleaning apparatus 10 will be described in detail.

  As shown in FIGS. 1 to 3, the cleaning device 10 includes a cleaning tank 20 in a housing 11, and the cleaning tank 20 integrally includes a water storage unit 21 that stores cleaning water in a lower part. The cleaning tank 20 is provided with a support rail 12 on the upper side of the water storage unit 21, and this support rail 12 supports a rack A for housing a medical instrument. A door 13 for opening and closing the front opening of the cleaning tank 20 is provided on the front surface of the housing 11, and the rack A is inserted into and removed from the cleaning tank 20 by opening the door 13. A temperature sensor 22 for detecting the temperature of the cleaning water and a heater 23 for heating the cleaning water are provided at the bottom of the water storage unit 21 of the cleaning tank 20. The heater 23 is used to reheat the hot water in the water storage unit 21 whose temperature has been lowered to a temperature suitable for disinfection when performing a hot water disinfection step of a cleaning program described later.

  Cleaning nozzles 24 and 25 for injecting cleaning water to medical instruments are rotatably supported on the upper and lower surfaces in the cleaning tank 20, and these cleaning nozzles 24 and 25 have a water storage section 21 below the cleaning tank 20. A circulation pipe 26 derived from the above is connected. The circulation pipe 26 is provided with a cleaning pump 27 that sends the cleaning water of the water storage unit 21 to the cleaning nozzles 24 and 25. When the cleaning pump 27 is operated, the cleaning water in the water storage unit 21 is sent to the cleaning nozzles 24 and 25 via the circulation pipe 26, and the cleaning nozzles 24 and 25 are rotated by the jetting reaction force of the cleaning water and are supplied with the cleaning water. Inject toward a medical device. The cleaning water sprayed on the medical instrument falls and returns to the water storage unit 21.

  As shown in FIG. 2, a water supply port 20 a and a hot water supply port 20 b for supplying cleaning water are formed on the rear wall upper portion (inner peripheral wall upper portion) of the cleaning tank 20. A water supply pipe 28 constituting cleaning water supply means is connected to the water supply port 20a, and the water supply pipe 28 is connected to a water supply source (not shown) such as water supply. A water supply valve 28 a is interposed in the water supply pipe 28, and water from the water supply source is supplied to the water storage unit 21 of the cleaning tank 20 through the water supply pipe 28 when the water supply valve 28 a is opened. A hot water supply pipe 29 is connected to the hot water supply port 20 b, and the hot water supply pipe 29 is connected to a hot water supply source such as a hot water heater 30. A hot water supply valve 29 a is interposed in the hot water supply pipe 29, and hot water in the water heater 30 is supplied to the water storage unit 21 of the washing tank 20 through the hot water supply pipe 29 by opening the hot water supply valve 29 a.

  As shown in FIGS. 2 and 3, the cleaning tank 20 is guided to the water storage unit 21 while preventing the water supplied from the water supply port 20 a from being scattered to the medical instrument side accommodated in the cleaning tank 20. Guide means are provided. The guide means includes a guide nozzle 31 provided in the water supply port 20a of the cleaning tank 20 and a guide plate 32 provided on the lower side. The guide nozzle 31 has a water outlet 31 a that opens downward, and the water supplied from the water supply port 20 a falls downward from the outlet 31 a of the guide nozzle 31. The guide plate 32 is for preventing the water dropped downward by the guide nozzle 31 from being scattered on the side of the medical instrument accommodated in the rack A. The guide plate 32 has a substantially U-shaped horizontal cross section opened on the rear wall side of the cleaning tank 20 and is provided along the vertical direction of the rear wall of the cleaning tank 20. A water passage is formed between them. The upper portion of the guide plate 32 is formed with a water intake port 32a whose upper end extends forward. The lower end of the guide plate 32 opens toward the water reservoir 21 on the lower side of the rack A that accommodates the medical instrument. A guide nozzle 33 is provided at the hot water supply port 20b of the cleaning tank 20, and the guide nozzle 33 has a hot water outlet 33a that opens downward. Hot water supplied from the hot water supply port 20 b falls downward from the outlet 33 a of the guide nozzle 33 and is guided to the water storage unit 21.

  As shown in FIG. 1, a drainage pipe 34 constituting drainage means is connected to a drainage port 21 a formed on the bottom surface of a water storage portion 21 of the cleaning tank 20, and a drainage pump 35 constituting drainage means is connected to the drainage pipe 34. Is intervening. Wash water in the water storage unit 21 is discharged to the outside through the drain pipe 34 by the operation of the drain pump 35. A water level detection tank 36 is connected to the water storage section 21 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 washing water in the water storage unit 21 is equal to or higher than a predetermined water level L necessary for washing. The float switch 37 is turned on when it is equal to or higher than the predetermined water level L, and is turned off when it is lower than the predetermined water level L. The cleaning tank 20 is provided with a detergent supply device 38 for supplying detergent. The detergent supply device 38 is detachably mounted with a detergent tank (not shown) that stores the detergent, and supplies the detergent in the detergent tank into the washing tank 20. In this cleaning apparatus 10, an alkaline detergent or an enzyme-containing detergent containing an enzyme such as a protease is used, and an alkaline detergent and an enzyme-containing detergent can be selectively used by exchanging the detergent tank storing these detergents. . In addition, the detergent containing an enzyme is suitable for use at 50 ° C. or less as a temperature at which an enzyme such as protease is not inactivated.

  As shown in FIG. 1, the hot water supply device 40 supplies hot water to the water storage section 21 of the cleaning tank 20, and is stored in the hot water tank 41 that stores hot water supplied from the water heater 30 and the hot water tank 41. The heater 42 and the overflow pipe 43 for sending the hot water in the hot water tank 41 to the water storage part 21 of the washing tank 20 are provided. The hot water tank 41 is provided outside the cleaning tank 20 in the housing 11. The heater 42 heats the hot water supplied into the hot water tank 41 so as to become hot water suitable for disinfection. The overflow pipe 43 is for sending hot water in the hot water tank 41 to the water storage part 21 of the washing tank 20. The overflow pipe 43 is made of a substantially L-shaped pipe member. Most of the vertical part 43a of the overflow pipe 43 is erected in the hot water tank 41, and the lower part of the vertical part 43a penetrates the bottom wall of the hot water tank 41 and extends from the lower end of the vertical part 43a. The tip opening is connected to a hot water supply port 20 c formed on the side wall of the cleaning tank 20. Since most of the vertical portion 43a of the overflow pipe 43 is accommodated in the hot water tank 41, the hot water passing through the overflow pipe 43 is difficult to cool. The upper end opening of the overflow pipe 43 is disposed above the hot water tank 41, and the upper end opening of the overflow pipe 43 is disposed at a position higher than a predetermined water level L suitable for cleaning the water storage unit 21.

  A hot water supply pipe 44 is connected to the hot water tank 41, and the hot water supply pipe 44 is connected to a hot water supply source such as the hot water heater 30. In this embodiment, the hot water supply pipe 44 is connected to the hot water heater 30, but the hot water supply pipe 44 may be connected to the hot water heater 30 via a hot water supply pipe 29 that supplies hot water to the water storage unit 21. A hot water supply valve 44a is interposed in the hot water supply pipe 44, and hot water in the water heater 30 is supplied from the hot water supply pipe 44 into the hot water tank 41 by opening the hot water supply valve 44a. A cylindrical guide 45 is provided in the hot water tank 41 to guide the hot water supplied from the hot water supply pipe 44 downward. The guide 45 guides hot water having a temperature lower than that of hot water supplied from the hot water supply pipe 44 to the lower part of the hot water tank 41, thereby reducing the temperature of the hot water sent from the upper end opening of the overflow pipe 43 to the water storage unit 21. It is for prevention. In the hot water tank 41, a temperature sensor 46 for detecting the temperature of the hot water is provided.

  The cleaning device 10 includes a control device 50. As shown in FIG. 4, the control device 50 includes a temperature sensor 22 for the cleaning tank 20, a heater 23 for the cleaning tank 20, a cleaning pump 27, and a water supply valve 28a. , A hot water supply valve 29a for the washing tank 20, a drain pump 35, a float switch 37, a detergent supply device 38, a heater 42 for the hot water tank 41, a hot water supply valve 44a for the hot water tank 41 and a temperature sensor 46 for the hot water tank 41 are connected. Has been. The control device 50 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 22 for the cleaning tank 20 and the temperature sensor 46 for the hot water tank 41, the on / off signal from the float switch 37, and the timer, the CPU 23 measures the heater 23 and the cleaning pump 27 for the cleaning tank 20. The cleaning program shown below by controlling the operation of the water supply valve 28a, the hot water supply valve 29a for the cleaning tank 20, the drain pump 35, the detergent supply device 38, the heater 42 for the hot water tank 41 and the hot water supply valve 44a for the hot water tank 41 Execute. The RAM temporarily stores variables and the like necessary for executing the cleaning program, and the ROM stores the cleaning program. The control device 50 is connected to an operation panel provided on the front panel of the housing 11, and by operating this operation panel, a cleaning program using an alkaline detergent or a cleaning program using an enzyme-containing detergent can be selected. It has become.

  Next, as an example of the cleaning program of the cleaning apparatus 10, a cleaning program for the alkaline detergent course will be described. The cleaning program for the alkaline detergent course sequentially executes a preliminary cleaning process, a main cleaning process, a rinse cleaning process, and a hot water disinfection process. Before describing the cleaning program for the alkaline detergent course, first, the hot water preparation process of the hot water supply device 40 used in the hot water disinfection process will be mainly described.

  When the power of the cleaning device 10 is turned on, the control device 50 opens the hot water supply valve 44a for the hot water tank 41 in step 101 as shown in FIG. The hot water in the water heater 30 is sent into the hot water tank 41 through the hot water pipe 44, and the water level of the hot water in the hot water tank 41 gradually rises. When the level of hot water in the hot water tank 41 exceeds the upper end of the overflow pipe 43, the hot water in the hot water tank 41 is sent to the water storage unit 21 of the cleaning tank 20 through the overflow pipe 43. In step 102, the control device 50 determines whether or not the hot water overflowed from the hot water tank 41 to the water storage section 21 by the overflow pipe 43 by the float switch 37 has reached the predetermined water level L, thereby overflowing into the hot water tank 41. It is determined whether hot water has been supplied to the upper end position of the pipe 43. In step 102, the controller 50 repeatedly determines “NO” until the hot water in the water storage unit 21 reaches the predetermined water level L, and the hot water in the water storage unit 21 becomes the predetermined water level L and is turned on from the float switch 37. When the signal is input, “YES” is determined, and the process proceeds to step 103. In step 103, the control device 50 closes the hot water supply valve 44 a for the hot water tank 41 and ends the hot water supply processing into the hot water tank 41.

  Next, in step 104, the control device 50 operates the drain pump 35 for a predetermined time for 30 seconds to drain the hot water overflowing from the hot water tank 41 to the water storage unit 21. At the same time as the processing in step 104, the control device 50 energizes the heater 42 in step 105 to heat the hot water in the hot water tank 41 to hot water.

  In step 106, the control device 50 determines whether or not it is the timing from the start of the cleaning program to the end of the hot water supply process of the hot water disinfection process, and when it is not the timing from the start of the cleaning program to the end of the hot water supply process of the hot water disinfection process. Determine “NO” and proceed to Step 107. When it is not the timing from the start of the cleaning program to the end of the hot water supply process of the hot water disinfection process, the hot water in the hot water tank 41 is heated to 72 ° C. so that it can be immediately heated to 85 ° C. as a temperature suitable for hot water disinfection. In step 107, the control device 50 determines whether or not the temperature of the hot water is 72 ° C. or higher by the temperature sensor 46 of the hot water tank 41, and if the temperature of the hot water in the hot water tank 41 is not 72 ° C. or higher. Return to step 105.

  While the control device 50 repeatedly executes the processing of steps 105 to 107 until the temperature of the hot water in the hot water tank 41 becomes 72 ° C. or higher, the temperature detected by the temperature sensor 46 for the hot water tank 41 is 72 ° C. or higher. Then, it is determined as “YES” in Step 107, and the process proceeds to Step 108. In step 108, the controller 50 stops energizing the heater 42 and returns to step 106. Thus, when it is not the timing from the start of the cleaning program to the end of the hot water disinfection process in the hot water disinfection process, the temperature of the hot water in the hot water tank 41 is set to 72 ° C. or higher so that it can be immediately heated to 85 ° C. as a temperature suitable for hot water disinfection. It is controlled to become.

  On the other hand, at the timing from the start of the cleaning program to the end of the hot water supply process of the hot water disinfection process, the hot water in the hot water tank 41 is set to 85 ° C. as a temperature suitable for the hot water disinfection before the start of the hot water supply process of the hot water disinfection process. It is necessary to do more. Therefore, at the timing from the start of the cleaning program to the end of the hot water supply process in the hot water disinfection process, the control device 50 determines “YES” in step 106 and proceeds to step 109. In step 109, the control device 50 determines whether or not the temperature of the hot water is 85 ° C. or higher by the temperature sensor 46 of the hot water tank 41, and if the temperature of the hot water in the hot water tank 41 is not 85 ° C. or higher. Return to step 105. While the control device 50 repeatedly executes the processing of steps 105, 106 and 109 until the temperature of the hot water in the hot water tank 41 becomes 85 ° C. or higher, the temperature detected by the temperature sensor 46 for the hot water tank 41 is 85. When the temperature is higher than or equal to ° C., “YES” is determined in step 109, and the process proceeds to step 108. In step 108, the controller 50 stops energizing the heater 42 and returns to step 106. Thus, from the start of the cleaning program to the end of the hot water disinfection process in the hot water disinfection process, the temperature of the hot water in the hot water tank 41 is set to 85 ° C. or more as a temperature suitable for the hot water disinfection process in the hot water disinfection process. Be controlled.

  Next, a cleaning program for an alkaline detergent course using hot water from the hot water supply device 40 for hot water disinfection will be described. When the user starts the alkaline detergent course cleaning program through the operation panel, the control device 50 first executes a pre-cleaning process in steps 201 to 205 as shown in FIG. In step 201, the controller 50 opens the water supply valve 28a and the hot water supply valve 29a for the cleaning tank 20, and starts the water supply process in the pre-cleaning process. Thereby, the water and hot water of the water supply source and the water heater 30 are sent to the water storage part 21 of the cleaning tank 20 through the water supply pipe 28 and the hot water supply pipe 29. In step 202, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached a predetermined water level L by detection of the float switch 37. In step 202, the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the predetermined water level L. While the cleaning water in the water storage unit 21 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 203. In step 203, the control device 50 closes the water supply valve 28a and the hot water supply valve 29a for the cleaning tank 20 to end the water supply process.

  Next, in step 204, the controller 50 operates the cleaning pump 27 for 1 minute as a cleaning process in the pre-cleaning process. Accordingly, the cleaning water in the water storage unit 21 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 205, the control device 50 operates the drain pump 35 for 30 seconds as a predetermined time as a drain process. Thereby, the wash water in the water storage unit 21 is discharged out of the machine through the drain pipe 34.

  When the pre-cleaning process in steps 201 to 205 is completed, the control device 50 causes the main cleaning process to be executed in steps 211 to 216. In this main cleaning process, the controller 50 opens the hot water supply valve 29a for the cleaning tank 20 in step 211 to start the hot water supply process in the main cleaning process. Thereby, the hot water of the water heater 30 is sent to the water storage part 21 of the cleaning tank 20 through the hot water supply pipe 29. In step 212, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached the predetermined water level L by detection by the float switch 37. In step 212, the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the predetermined water level L. While the cleaning water in the water storage unit 21 reaches 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 213. In step 213, the controller 50 closes the hot water supply valve 29a for the cleaning tank 20 and ends the hot water supply process.

  Next, as a cleaning process in the main cleaning process, the control device 50 supplies an alkaline detergent into the cleaning tank 20 by the detergent supply device 38 in Step 214, and operates the cleaning pump 27 for 3 minutes in Step 215. Accordingly, the cleaning water containing the alkaline detergent in the water storage unit 21 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 216, the control device 50 operates the drain pump 35 as a predetermined time for 30 seconds as a drain process. Thereby, the wash water in the water storage unit 21 is discharged out of the machine through the drain pipe 34.

  When the main cleaning process in steps 211 to 216 is completed, the control device 50 causes the rinse cleaning process to be executed in steps 221 to 225. In this rinsing process, the controller 50 opens the hot water supply valve 29a for the cleaning tank 20 in step 221, and starts the hot water supply process in the rinsing process. Thereby, the hot water of the water heater 30 is sent to the water storage part 21 of the cleaning tank 20 through the hot water supply pipe 29. In step 222, the control device 50 determines whether or not the cleaning water in the water storage unit 21 in the cleaning tank 20 has reached the predetermined water level L by the detection of the float switch 37. In step 222, the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the predetermined water level L. While the cleaning water in the water storage unit 21 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 223. In step 223, the control device 50 closes the hot water supply valve 29a for the cleaning tank 20 and ends the hot water supply process.

  Next, in step 224, the controller 50 operates the cleaning pump 27 for 15 seconds as a cleaning process in the rinse cleaning process. As a result, the cleaning water in the water storage unit 21 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 contain detergent. Rinse the wash water. After this cleaning process, in step 225, the controller 50 operates the drain pump 35 for a predetermined period of 30 seconds as a drain process. Thereby, the wash water in the water storage unit 21 is discharged out of the machine through the drain pipe 34.

  When the rinsing process in steps 221 to 225 is completed, the control device 50 causes the hot water disinfection process to be executed in steps 231 to 247. In this hot water disinfection process, in step 231, the control device 50 opens the hot water supply valve 44a for the hot water tank 41 to start the hot water supply process in the hot water disinfection process. Thereby, the hot water in the water heater 30 is sent into the hot water tank 41 through the hot water pipe 44, and the hot water in the hot water tank 41 is sent out by overflowing from the overflow pipe 43 to the water storage unit 21 due to the increased hot water. At this time, since the hot water supplied from the hot water supply pipe 44 into the hot water tank 41 is guided to the lower part of the hot water tank 41 by the guide 45, the temperature of the hot water around the upper end opening of the overflow pipe 43 of the hot water tank 41 decreases. It has become difficult. In step 232, the control device 50 determines whether or not the hot water in the water storage unit 21 has reached the predetermined water level L by detection of the float switch 37. In step 232, the control device 50 repeatedly determines “NO” until the hot water in the water storage unit 21 reaches the predetermined water level L. While the hot water in the water storage unit 21 reaches the predetermined water level L, the control device 50 turns on from the float switch 37. When the signal is input, “YES” is determined, and the process proceeds to Step 233. In step 233, the control device 50 closes the hot water supply valve 44a for the hot water tank 41 and ends the hot water supply process.

  Next, in step 234, the controller 50 operates the cleaning pump 27 to start the hot water disinfection process. Hot water in the water reservoir 21 is pumped by the cleaning pump 27 to the cleaning nozzles 24 and 25 through the circulation pipe 26, and the cleaning nozzles 24 and 25 spray hot water on the medical instrument while rotating. In step 235, the controller 50 determines whether or not the temperature detected by the temperature sensor 22 for the cleaning tank 20 is equal to or higher than 80 ° C., which is a temperature range suitable for disinfection. If the temperature of the hot water in the water storage unit 21 is 80 ° C. or higher, the temperature is suitable for disinfection, and therefore the control device 50 determines “YES” in step 235 and proceeds to step 237.

  On the other hand, when the hot water in the water storage unit 21 is sprayed from the cleaning nozzles 24 and 25 in step 234, the hot water is heat-exchanged with the medical instrument and the inner wall of the cleaning tank 20, and the temperature drops to 80 ° C. May be lower. At this time, the control device 50 determines “NO” in step 235 and proceeds to step 236, and in step 236, the heater 23 for the cleaning tank 20 is energized. Thereby, the hot water in the water storage unit 21 is heated by the heater 23 while being jetted from the washing nozzles 24 and 25, and the temperature gradually rises.

  After determining “YES” in step 235 or after processing in step 236, the control device 50 starts measuring hot water disinfection time by a timer in step 237. Next, in step 238, the control device 50 determines whether or not the temperature detected by the temperature sensor 22 for the cleaning tank 20 is 85 ° C. or higher. When the hot water in the water storage unit 21 reaches 85 ° C. or higher, the control device 50 determines “YES” in step 238, and proceeds to step 239. In step 239, the control device 50 stops energization of the heater 23 for the cleaning tank 20 and proceeds to step 240. On the other hand, if the hot water in the water storage part 21 is not 85 degreeC or more, the control apparatus 50 will determine with "NO" in step 238, and will advance to step 240. FIG.

  In step 240, the controller 50 determines whether or not the temperature detected by the temperature sensor 22 for the cleaning tank 20 is 81 ° C. or higher. If the hot water in the water storage part 21 is 81 degreeC or more, the control apparatus 50 will determine with "YES" in step 240, and will advance to step 241. In step 241, the controller 50 determines whether or not the hot water disinfection time started in step 237 has elapsed 10 minutes. If the hot water disinfection time has not elapsed 10 minutes, the control device 50 makes a “NO” determination at step 241 to return to step 238.

  On the other hand, when it is determined in step 240 whether or not the temperature detected by the temperature sensor 22 for the cleaning tank 20 is 81 ° C. or higher, if the hot water in the water storage unit 21 is not 81 ° C. or higher, the control device 50 In 240, “NO” is determined, and the process proceeds to step 242. In step 242, the controller 50 further determines whether the hot water in the water storage unit 21 is 80 ° C. or higher. If the hot water in the water storage part 21 is 80 degreeC or more, the control apparatus 50 will determine with "YES" in step 242, and will advance to step 243. In step 243, the controller 50 energizes the heater 23 for the cleaning tank 20 and returns to step 238. Thereby, the hot water in the water storage part 21 is heated by the heater 23, and is maintained at 80 degreeC or more.

  On the other hand, if the hot water in the water storage part 21 is not 80 degreeC or more, the control apparatus 50 will determine with "NO" in step 242, and will return to step 236. Thus, if the hot water in the water storage part 21 becomes lower than 80 degreeC, it will return to step 236, the hot water in the water storage part 21 will be heated, and the measurement of the hot water disinfection time will be started anew.

  When the hot water disinfection time in which the hot water in the water storage unit 21 is maintained at 80 ° C. or more and 10 minutes have elapsed since step 237 has elapsed, the control device 50 determines “YES” in step 241, Proceed to step 244. The controller 50 stops the energization of the heater 23 for the cleaning tank 20 in step 244 and stops the operation of the cleaning pump 27 in step 245. As described above, the medical instrument is sterilized by injecting hot water maintained at 80 ° C. or more from the cleaning nozzles 24 and 25 for 10 minutes.

  Next, in step 246, the controller 50 opens the water supply valve 28 a for a predetermined time for wastewater treatment for 10 seconds, and supplies water from the water supply pipe 28 to the water storage unit 21. The temperature of the hot water in the water storage section 21 is lowered by the water from the water supply pipe 28, and even if this is drained, the drainage path including the drain pipe 34 and the drainage pump 35 is not easily deteriorated by the hot water. Next, in step 247, the control device 50 operates the drain pump 35 for 30 seconds as a predetermined time. As a result, the hot water in the water storage section 21 is discharged outside the machine through the drain pipe 34.

  In the cleaning apparatus 10 configured as described above, before the hot water used in the hot water sterilization process is drained, the hot water used for the hot water sterilization is supplied to the water storage unit 21 and then drained by the drain pump 35. The drainage pipe 34 and the drainage pump 35 as drainage means are hardly deteriorated by the heat of hot water. In this cleaning device 10, a guide is provided as a guide means for preventing the water supplied from the water supply port 20 a from being scattered in the cleaning tank 20 toward the medical instrument housed in the cleaning tank 20 and guiding it to the water storage section. A nozzle 31 and a guide plate 32 are provided. When the hot water disinfection process is executed by the cleaning device 10, the hot water in the water storage section 21 is cooled by the water supplied from the water supply pipe 28 by opening the water supply valve 28 a for 10 seconds as a predetermined time before the waste water treatment. It will be. The water of the water supply source tries to be discharged horizontally from the water supply port 20a into the cleaning tank 20 due to the water pressure, but is guided downward by the guide nozzle 31 and falls. The water dropped by the guide nozzle 31 is guided to the water storage section 21 below the rack A through a passage between the intake port 32a at the upper end opening of the guide plate 32 and the rear wall of the cleaning tank 20. Thereby, in order to make the drain pipe 34 and the drain pump 35 difficult to be deteriorated by the hot water of the water storage unit 21, the water of the water supply source is supplied from the water supply port 20a to the water storage unit 21 before the drainage treatment in the hot water disinfection process. However, since the water introduced from the water supply port 20a is not applied to the medical device, the medical device can be immediately dried by residual heat when the medical device sterilized with hot water is taken out from the washing tank.

  In the cleaning apparatus of the present embodiment, the guide means includes the guide nozzle 31 and the guide plate 32 provided in the cleaning tank 20, but the present invention is not limited to this. For example, the water supply port of the cleaning tank 20 When a tubular member or a cylindrical member is provided in 20a and the water introduced into the washing tank 20 from the water supply port 20a may be guided to the water storage unit 21 without being scattered to the object to be cleaned, In addition, the same operational effects as those of the above-described embodiment can be obtained.

  Further, in the cleaning device of the present embodiment, the drainage means includes the drain pipe 34 connected to the drain port 21a of the water storage section 21 of the cleaning tank 20 and the drain pump 35 interposed therein, but the present invention For example, the drain pipe 34 connected to the drain port 21a of the water storage section 21 may be provided with a drain valve that opens and closes the drain pipe 34, and the above-described implementation is also possible. The same effect as the form can be obtained.

  Further, in the cleaning device of the present embodiment, the hot water supply means is the hot water supply device 40, but the present invention is not limited to this. For example, water supplied from a water supply source by a heater provided in the water storage unit 21 is used. Alternatively, the hot water supplied from the water heater 30 may be heated until it becomes hot water, and even when this is done, the same effects as the above-described embodiment can be obtained.

  In the present embodiment, the temperature range of hot water suitable for disinfection is defined as 80 ° C. to 85 ° C. However, the present invention is not limited to this, and naturally the hot water is higher than this temperature range. It is suitable for disinfection, and some objects to be disinfected can be sufficiently disinfected even if the temperature is lower than this temperature range.

  DESCRIPTION OF SYMBOLS 10 ... Cleaning apparatus, 20 ... Cleaning tank, 20a ... Water supply port, 21 ... Water storage part, 24, 25 ... Cleaning nozzle, 27 ... Cleaning pump, 28 ... Cleaning water supply means (water supply pipe), 31, 32 ... Guide means ( Guide nozzle, guide plate), 40... Hot water supply means (hot water supply device).

Claims (1)

A cleaning tank that has a water storage part for storing cleaning water in the lower part and accommodates an object to be cleaned on the upper side of the water storage part,
Washing water supply means for supplying water from the water supply source to the water storage unit as at least part of the cleaning water from a water supply port formed on the inner peripheral wall of the cleaning tank;
Hot water supply means for supplying hot water to the water reservoir;
A cleaning nozzle that injects cleaning water from the water storage section onto an object to be cleaned contained in the cleaning tank;
A cleaning pump for sending the cleaning water of the water reservoir to the cleaning nozzle;
Drainage means for draining the wash water of the water reservoir,
A cleaning process of spraying the cleaning water of the water storage section from the cleaning nozzle onto the object to be cleaned by the cleaning pump, and draining the cleaning water from the draining means after cleaning,
After this cleaning step, hot water supplied to the water storage section by the hot water supply means is sprayed from the cleaning nozzle to the object to be cleaned by the cleaning pump, and after hot water disinfection, the water supply source is supplied by the cleaning water supply means. A hot water sterilization step of supplying hot water used for hot water sterilization from the drainage means after supplying the water to the water storage section,
The cleaning tank is provided with guide means for preventing the water supplied from the water supply port from scattering to the object to be cleaned housed in the cleaning tank and guiding it to the water storage section. apparatus.

Images