JP2016087164A - Washing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent washing water from squirting from an air outlet in performing a boiling water sterilization and washing process under the condition where hot washing water cannot be supplied from a hot water supply source.SOLUTION: In a washing apparatus 10, rinsing and washing are performed by using washing water in which water from a first water supply pipe 34 and boiling water from a boiling water supply device 40 are mixed by a washing water supply means in performing a rinsing and washing process. A difference in a temperature between the washing water in the rinsing and washing process and the washing water of the boiling water in a boiling water sterilization and washing process is reduced. When the washing water is squirted to the inside of a washing chamber 20 from washing nozzles 25, 26 in the boiling water sterilization and washing process, an increase in a pressure due to a rapid rise of the temperature inside the washing chamber 20 is suppressed. Thus, scattering of the washing water from an air outlet 20a in an upper part of the washing chamber 20 can be prevented.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cleaning apparatus that cleans an object to be cleaned, and more particularly to a cleaning apparatus that performs hot water disinfection cleaning using hot water supplied from a hot water supply apparatus.

  Patent Document 1 discloses a cleaning apparatus mainly intended for cleaning medical instruments. This cleaning device stores water to be cleaned and stores cleaning water in the lower part, a cleaning tank having an exhaust port in the upper part, and water sent from a hot water source such as a water heater to store it as hot water. Washing using at least one of hot water supply device having a hot water storage tank, water sent from a water supply source such as water supply, hot water sent from a hot water supply source such as a water heater, and hot water sent from the hot water supply device Washing water supply means for supplying water to the water storage unit, a detergent supply device for supplying detergent into the cleaning tank, a cleaning nozzle for ejecting cleaning water from the water storage unit to the object to be cleaned contained in the cleaning tank, and a water storage unit And a cleaning pump for feeding the cleaning water to the cleaning nozzle. The cleaning water supply means of the cleaning device of Patent Document 1 includes a water supply pipe connected to a water supply source such as a water supply via a water supply valve, and a hot water supply pipe connected to a hot water supply source such as a water heater connected via a hot water supply valve. And a hot water supply pipe led out from the hot water supply device, and the water supply pipe, the hot water supply pipe and the hot water supply pipe are connected to the washing tank.

  The control device of this cleaning apparatus has a cleaning program for cleaning an object to be cleaned using a detergent, and this cleaning program is a cleaning pump for cleaning water using water and hot water supplied from a cleaning water supply means. A detergent (for example, alkaline detergent) is added from the detergent supply device to the pre-cleaning process in which pre-cleaning is performed by spraying the object to be cleaned from the cleaning nozzle by using the cleaning water using hot water supplied from the cleaning water supply means after the pre-cleaning process The main cleaning process in which the cleaning liquid containing detergent is sprayed from the cleaning nozzle onto the object to be cleaned by the cleaning pump, and the cleaning water using the hot water supplied from the cleaning water supply means is cleaned by the cleaning pump after the main cleaning process. A rinsing washing process in which the object is washed by being sprayed from the nozzle, and washing water using hot water supplied from the washing water supply means is supplied from the washing nozzle by the washing pump after the rinsing washing process. Injection to and executes the scalding cleaning process for scald wash.

  In this cleaning apparatus, cleaning water made of about 50 ° C. hot water sent from a water heater is used in the rinsing cleaning process, and hot water disinfection cleaning process made of about 90 ° C. hot water sent from the hot water supply device. Washing water was used, and a temperature difference of about 40 ° C. was generated in the washing tank when the rinsing washing process shifted to the hot water disinfection washing process. When performing hot water disinfection cleaning process and spraying hot water from the cleaning nozzle into the cleaning tank, the pressure in the cleaning tank increases due to a sudden rise in temperature, and the cleaning water scatters from the upper exhaust port of the cleaning tank was there. In order to cope with this, the controller of this cleaning apparatus has a pump rotation speed control unit that adjusts the amount of water discharged from the cleaning pump by controlling the rotation speed of the cleaning pump, and performs the hot water disinfection cleaning process. At the time of execution, the pump rotational speed control unit controls the rotational speed of the cleaning pump to be lowered for a predetermined time. As a result, hot water is injected into the cleaning tank while suppressing the momentum, thereby preventing the temperature in the cleaning tank from rising rapidly and increasing the pressure, and the cleaning water is scattered from the exhaust port at the top of the cleaning tank. There is no such thing.

JP, 2014-097144, A

  Depending on the facility in which the above-described cleaning device of Patent Document 1 is installed, a water heater for supplying hot water may not be installed. In this case, a hot water supply device has a hot water storage tank connected to a second water supply pipe for supplying water from a water supply source instead of the hot water supply pipe, and the cleaning tank has a water supply pipe and hot water supply as a cleaning water supply means. Will connect the tube. When the cleaning water supply means is cleaning water using at least one of water from a water supply source and hot water from a hot water supply device, if the above cleaning program is partially changed and executed, It is washed with washing water made of water, washed with washing water in which water and hot water are mixed in the main washing process, washed with washing water made of water in the rinsing washing process, and washed water made of hot water in the hot water disinfection washing process. Will be washed. In this case, the temperature of the washing water made of water in the rinsing washing process is less than 30 ° C. like the temperature of a general water supply, the temperature of the washing water made of hot water in the hot water disinfection washing process is 90 ° C., In the washing tank, a temperature difference of 60 ° C. or more was caused when the rinsing washing process was shifted to the hot water disinfection washing process. In such a state, as described above, when the pump rotation speed control unit controls the rotation speed of the cleaning pump to be lowered for a predetermined time in the hot water disinfection cleaning process, the rinsing cleaning process shifts to the hot water disinfection cleaning process. The temperature difference in the cleaning tank was so large that the temperature in the cleaning tank suddenly increased and the pressure increased, and the cleaning water was scattered from the exhaust port at the top of the cleaning tank. In this case, it has been considered to further reduce the number of revolutions of the cleaning pump, but there is a possibility that the required minimum torque of the cleaning pump may be reduced, and there is a possibility that the cleaning water cannot be sent to the cleaning nozzle. An object of the present invention is to prevent cleaning water from being ejected from an exhaust port when a hot water disinfection cleaning process is performed even under conditions where hot water cleaning water cannot be supplied from a hot water supply source.

  In order to solve the above-mentioned problems, the present invention heats water sent from a water supply source, a water storage part that stores an object to be cleaned and stores cleaning water in the lower part, a cleaning tank having an exhaust port in the upper part, and hot water as hot water. A hot water supply device having a hot water storage tank for storing, a cleaning water supply means for supplying cleaning water comprising at least one of water sent from a water supply source and hot water sent from the hot water supply device to the water storage unit; Detergent supply device for supplying detergent to the cleaning tank, a cleaning nozzle for ejecting cleaning water from the water storage section to the object to be cleaned contained in the cleaning tank, a cleaning pump for sending the cleaning water from the water storage section to the cleaning nozzle, and a cleaning water supply A main cleaning step in which the detergent supplied from the detergent supply device is added to the cleaning water supplied from the means, and the cleaning liquid containing the detergent is sprayed from the cleaning nozzle onto the object to be cleaned by the cleaning pump, and after the main cleaning step. Supply from cleaning water supply means The washing water is sprayed from the washing nozzle onto the object to be washed by the washing pump and rinsed and washed with hot water supplied by the washing water supply means after the rinsing washing process. And a control device having a cleaning program for executing a hot water disinfection cleaning process for spraying hot water to disinfect the object to be cleaned, and the control device controls the number of rotations of the cleaning pump to control the amount of water discharged from the cleaning pump A cleaning device having a pump rotational speed control unit for adjusting, wherein the control device controls the pump rotational speed control unit to lower the rotational speed of the cleaning pump for a predetermined time when the hot water disinfection cleaning process is executed, Provided is a cleaning apparatus characterized in that, when performing a process, rinsing is performed using cleaning water obtained by mixing water and hot water by a cleaning water supply means. Than is.

  In the cleaning apparatus configured as described above, when the rinsing cleaning process is executed, the cleaning water supplying means is used to perform rinsing cleaning using cleaning water in which water and hot water are mixed. The temperature difference between the water and the cleaning water during the hot water disinfection cleaning process can be reduced, and even if the cleaning water is injected into the cleaning tank during the hot water disinfection cleaning process, the temperature in the cleaning tank rises rapidly. It was possible to suppress an increase in pressure due to the fact that the washing water was scattered from the exhaust port at the top of the washing tank.

1 is a schematic view of a cleaning apparatus according to the present invention. It is a block diagram of a control apparatus. It is a flowchart which shows the washing | cleaning program of an alkaline detergent course (1). It is a flowchart which shows the washing | cleaning program of an alkaline detergent course (2).

  Hereinafter, a cleaning apparatus according to the present invention will be described with reference to the drawings. The cleaning apparatus of the present invention is mainly for cleaning an object to be cleaned such as a medical instrument, and the cleaning apparatus of the present invention will be described with reference to an embodiment in which the cleaning apparatus is installed in a facility where a hot water source such as a water heater is not provided. . As shown in FIG. 1, the cleaning device 10 includes a cleaning tank 20 in a housing 11. The cleaning tank 20 accommodates an object to be cleaned such as a medical instrument placed in the rack A, and a door 12 is provided at the front opening of the cleaning tank 20 into and out of the rack A so as to be opened and closed. A water storage section 21 for storing cleaning water is provided at the lower portion of the cleaning tank 20. An exhaust port 20 a is formed in the upper part of the cleaning tank 20, and an exhaust cylinder 22 for discharging the exhaust discharged from the cleaning tank 20 to the outside of the housing 11 is provided in the exhaust port 20 a.

  A temperature sensor 23 is provided in the water storage section 21 of the cleaning tank 20, and the temperature sensor 23 detects the temperature of the cleaning water. Further, the water storage unit 21 is provided with a heater 24, and the heater 24 heats the cleaning water in the water storage unit 21. Washing nozzles 25 and 26 for injecting washing water onto medical instruments are rotatably supported on the upper and lower surfaces of the washing tank 20, and a circulation pipe 27 led out from the water storage unit 21 is supported on these washing nozzles 25 and 26. It is connected. The circulation pipe 27 is provided with a cleaning pump 28 for sending the cleaning water of the water storage unit 21 to the cleaning nozzles 25 and 26. When the cleaning pump 28 is driven, the cleaning water in the water storage unit 21 is sent to the cleaning nozzles 25 and 26 via the circulation pipe 27, and the cleaning nozzles 25 and 26 are rotated by the reaction force of the cleaning water while rotating the cleaning water. Inject toward a medical device. Note that the cleaning water sprayed from the cleaning nozzles 25 and 26 onto the medical instrument falls back to the water storage unit 21.

  As shown in FIG. 1, a drain port 21a is formed on the bottom surface of the water storage unit 21, and a drain pipe 29 is connected to the drain port 21a. A drainage pump 30 is interposed in the drainage pipe 29. When the drainage pump 30 is driven, the cleaning water in the water storage unit 21 is drained through the drainage pipe 29.

  Two water level detection tanks 31 and 32 are connected to the water storage section 21 through the upstream portion of the drainage pump 30 of the drain pipe 29. Float switches (water level sensors) 31a and 32a are connected to the water level detection tanks 31 and 32, respectively. Is housed. The float switch 31a detects that the cleaning water in the water storage unit 21 is at or above the cleaning water level (predetermined water level) L1 necessary for cleaning. The float switch 31a is turned on when the cleaning water level L1 is higher than the cleaning water level L1. It becomes. The float switch 32a detects that the cleaning water in the water storage section 21 is higher than the abnormal water level L2 higher than the cleaning water level L1, and is turned on when it becomes higher than the abnormal water level L2, and is turned off when lower than the abnormal water level L2. Become. In the present embodiment, the amount of water at the cleaning water level L1 is set to 6L, and the amount of water at the abnormal water level L2 is set to 8L.

  A detergent supply device 33 that supplies detergent to the cleaning tank 20 is provided in the housing 11. The detergent supply device 33 includes a detergent supply pipe 33a for sending detergent from the detergent tank D storing the detergent to the washing tank 20, and a detergent supply pump 33b interposed in the detergent supply pipe 33a. When the detergent supply pump 33b is driven, the detergent in the detergent tank D is supplied to the cleaning tank 20 through the detergent supply pipe 33a. The detergent tank D contains alkaline detergents, detergents containing enzymes such as proteases, neutral detergents or acidic detergents. By replacing the detergent tank D containing each detergent, each detergent can be changed. Can be used selectively.

  The cleaning tank 20 has a water supply port and a hot water supply port. When installed in a facility where a hot water supply source such as a water heater is not provided as in this embodiment, the cleaning water supply means is provided at the water supply port of the cleaning tank 20. The 1st water supply pipe 34 which comprises is connected, and the hot-water supply port is in the state closed by the sealing member. One end of the first water supply pipe 34 is connected to a water supply source such as a water supply, and the other end is connected to a water supply port of the cleaning tank 20. A first water supply valve 35 is interposed in the first water supply pipe 34, and when the first water supply valve 35 is opened, water from the water supply source is sent to the cleaning tank 20 through the first water supply pipe 34. When the cleaning apparatus 10 is installed in a facility provided with a hot water source such as a hot water heater, a hot water pipe led out from the hot water source is connected to the hot water outlet of the cleaning tank 20, and a hot water valve interposed in the hot water pipe is provided. By opening, hot water from a hot water supply source may be sent to the washing tank 20 through a hot water supply pipe.

  A hot water supply device 40 for supplying hot water to the cleaning tank 20 is provided in the housing 11, and the hot water supply device 40 constitutes a cleaning water supply means together with the first water supply pipe 34 described above. The hot water supply device 40 includes a hot water storage tank 41 for storing hot water, and the hot water storage tank 41 of this embodiment has a capacity capable of storing 8.5 L of hot water. A second water supply pipe 42 branched from the first water supply pipe 34 described above is connected to the hot water storage tank 41, and a second water supply valve 43 is interposed in the second water supply pipe 42. In addition, the 2nd water supply pipe | tube 42 is not restricted to what was branched from the 1st water supply pipe | tube 34, You may connect directly to water supply sources, such as water supply. When the second water supply valve 43 is opened, water from the water supply source is sent to the hot water storage tank 41 through the first and second water supply pipes 34 and 42. The hot water storage tank 41 is provided with a heater 44, and the heater 44 heats the water supplied into the hot water storage tank 41 so as to become hot water (about 90 ° C.). A temperature sensor 45 is provided in the hot water storage tank 41, and the temperature sensor 45 detects the temperature of water (hot water) in the hot water storage tank 41. An overflow pipe 46 is provided in the hot water storage tank 41, and the upper end opening of the overflow pipe 46 opens upward at the upper part of the hot water storage tank 41, and the lower part of the overflow pipe 46 extends outward from the lower part of the hot water storage tank 41. The lower end of the overflow pipe 46 is connected to the lower part of the cleaning tank 20. The hot water heated in the hot water storage tank 41 overflows from the overflow pipe 46 by the water supplied from the second water supply pipe 42 so as to exceed the upper end opening of the overflow pipe 46 and is supplied to the cleaning tank 20. When the cleaning apparatus 10 is installed in a facility provided with a hot water supply source such as a hot water heater, the hot water storage tank 41 is derived from a hot water supply source instead of the second water supply pipe 42 or branched from the hot water supply pipe described above. You may make it send the hot water from a hot water supply source to the hot water tank 41 through a 2nd hot-water supply pipe | tube by connecting a 2nd hot-water supply pipe | tube and opening the 2nd hot-water supply valve interposed in the 2nd hot-water supply pipe | tube.

  The cleaning device 10 includes a control device 50. As shown in FIG. 2, the control device 50 includes a temperature sensor 23, a heater 24, a cleaning pump 28, a drainage pump 30, float switches 31a and 32a, and a detergent supply. The pump 33b, the 1st water supply valve 35, the 2nd water supply valve 43, the heater 44, and the temperature sensor 45 are connected. 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. The CPU determines the heater 24, the cleaning pump 28, the drainage pump 30, the detergent supply pump 33b, the first and second based on the temperature detected by the temperature sensors 23 and 45, the on / off signal from the float switches 31a and 32a, and the timer. The operation of the water supply valves 35 and 43 and the heater 44 is controlled to execute the cleaning program shown below. 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 includes a cleaning pump control unit 51 that controls the rotational speed of the cleaning pump 28, and the control device 50 controls the rotational speed of the cleaning pump 28 (motor thereof) by the cleaning pump control unit 51. The amount of water discharged from 28 is adjusted. The cleaning pump control unit 51 controls the rotational speed to be reduced in two stages (20% and 50%) compared to when the cleaning pump 28 is rotated at the rated output (maximum output during normal operation). The cleaning pump control unit 51 controls the output of the cleaning pump 28 to be reduced to 20% and 50% of the rated output. However, the present invention is not limited to this, and the required minimum torque of the cleaning pump 28 is used. If it is high, the output may be reduced to an arbitrary output (for example, 30%, 40%, etc.). In this embodiment, the cleaning pump control unit 51 uses a triac to control the motor energizing time of the cleaning pump 28 to control the rotation speed of the cleaning pump 28. However, other control means such as inverter control and phase control are used. May be used to control the rotational speed of the cleaning pump 28.

  Next, as an example of the cleaning program of the cleaning apparatus 10, an alkaline detergent course cleaning program will be described with reference to the flowcharts shown in FIGS. The alkaline detergent course cleaning program described below is a cleaning program having a pre-cleaning process, a main cleaning process, a rinsing cleaning process, and a hot water disinfection cleaning process. Further, in the cleaning device 10, when the main power is turned on, water is supplied from the second water supply pipe 42 to the hot water storage tank 41 in the hot water supply apparatus 40 up to the water level at the upper end opening of the overflow pipe 46. The water in 41 is heated by the heater 44 until it becomes hot water (about 90 ° C.) based on the temperature detected by the temperature sensor 45.

  When the hot water is stored in the hot water storage tank 41 of the hot water supply device 40 as described above, when the alkaline detergent course cleaning program is executed, the control device 50 first executes a pre-cleaning process in steps 101 to 105. In the pre-cleaning process, before the main cleaning process, the blood and proteins are adhered to the medical device by using a cleaning water made of water so that the blood and proteins are not coagulated by the high temperature cleaning water. It is a cleaning process. In step 101, the control device 50 opens the first water supply valve 35 and starts supplying cleaning water made of water into the cleaning tank 20. In step 102, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached the cleaning water level L1 by the detection of the float switch 31a. While the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the cleaning water level L1, the cleaning water in the water storage unit 21 becomes the cleaning water level L1 and an ON signal is output from the float switch 31a. If it is input, “YES” is determined, and the process proceeds to step 103. In step 103, the control device 50 closes the first water supply valve 35 and ends the water supply process.

  Next, in step 104, the controller 50 drives the cleaning pump 28 for 1 minute as a cleaning process in the pre-cleaning process. The cleaning water in the water storage unit 21 is pumped to the cleaning nozzles 25 and 26 via the circulation pipe 27, and the cleaning nozzles 25 and 26 rotate and spray the cleaning water onto the medical instrument for cleaning. After the cleaning process, in step 105, the control device 50 drives the drain pump 30 for 30 seconds to discharge the cleaning water in the water storage unit 21 from the drain pipe 29.

  When the pre-cleaning process in steps 101 to 105 is completed, the control device 50 causes the main cleaning process to be executed in steps 111 to 116. This cleaning process is a cleaning process for cleaning a medical instrument using cleaning water containing a detergent. In this main cleaning process, in step 111, the control device 50 opens the first and second water supply valves 35 and 43 to start the water supply process in the main cleaning process. Water from the water supply source is sent to the water storage section 21 of the cleaning tank 20 through the first water supply pipe 34 and is sent to the hot water storage tank 41 of the hot water supply apparatus 40 through the second water supply pipe 42. Hot water in the hot water storage tank 41 overflows from the overflow pipe 46 by the water sent out by the second water supply pipe 42 and is sent to the water storage section 21. In step 112, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached the cleaning water level L1 by the detection of the float switch 31a. While the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the cleaning water level L1, the cleaning water in the water storage unit 21 becomes the cleaning water level L1 and an ON signal is output from the float switch 31a. If it is input, “YES” is determined, and the process proceeds to step 113. In step 113, the control device 50 closes the first and second water supply valves 35 and 43 to end the water supply and hot water supply processing. When the temperature of the cleaning water in the water storage unit 21 detected by the temperature sensor 23 is lower than, for example, 50 ° C., the temperature of the cleaning water detected by the temperature sensor 23 is 50 ° C. in order to enhance the cleaning effect by the detergent. The heater 24 may be operated until the cleaning water is heated.

  Next, as a cleaning process in the main cleaning process, the control device 50 drives the detergent supply pump 33b to supply the alkaline detergent into the cleaning tank 20 in step 114, and in step 115, sets the cleaning pump 28 for 3 minutes. Drive. The cleaning water containing the detergent in the water storage unit 21 is pumped to the cleaning nozzles 25 and 26 through the circulation pipe 27, and the cleaning nozzles 25 and 26 rotate and spray the cleaning water onto the medical instrument for cleaning. After this cleaning process, in step 116, the control device 50 drives the drain pump 30 for 30 seconds to discharge the cleaning water in the water storage unit 21 from the drain pipe 29.

  When the main cleaning process in steps 111 to 116 is finished, the control device 50 causes the rinse cleaning process to be executed in steps 121 to 125. The rinsing / cleaning step is a rinsing step of rinsing / cleaning cleaning water containing a detergent attached to the medical device. In this rinsing process, the controller 50 opens the first and second water supply valves 35 and 43 in step 121 to start the water supply process in the rinsing process. Water from the water supply source is sent to the water storage section 21 of the cleaning tank 20 through the first water supply pipe 34 and is sent to the hot water storage tank 41 of the hot water supply apparatus 40 through the second water supply pipe 42. The hot water in the hot water storage tank 41 is sent out to the water storage unit 21 by overflowing from the overflow pipe 46 by the water sent out by the second water supply pipe 42. In step 122, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached the cleaning water level L1 by the detection of the float switch 31a. While the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the cleaning water level L1, the cleaning water in the water storage unit 21 becomes the cleaning water level L1 and an ON signal is output from the float switch 31a. If it is input, “YES” is determined, and the process proceeds to step 123. In step 123, the control device 50 closes the first and second water supply valves 35 and 43 to end the water supply and hot water supply processing.

  Next, as a cleaning process in the rinse cleaning process, the control device 50 drives the cleaning pump 28 for 3 minutes in step 124. The cleaning water in the water storage unit 21 is pumped to the cleaning nozzles 25 and 26 via the circulation pipe 27, and the cleaning nozzles 25 and 26 rotate and spray the cleaning water onto the medical instrument for cleaning. After the cleaning process, the control device 50 drives the drain pump 30 for 30 seconds to discharge the cleaning water in the water storage unit 21 from the drain pipe 29 in step 125.

  When the rinsing cleaning process in steps 121 to 125 is completed, the control device 50 causes the hot water disinfection cleaning process to be executed in steps 131 to 137. The hot water disinfection cleaning process is a cleaning process in which cleaning water made of hot water is sprayed onto a medical instrument to disinfect the hot water. In this hot water disinfection cleaning process, the controller 50 opens the second water supply valve 43 in step 131 to start the hot water supply process in the hot water disinfection cleaning process. The water of the water supply source is sent to the hot water storage tank 41 of the hot water supply device 40 through the second water supply pipe 42. The hot water in the hot water storage tank 41 is sent out to the water storage unit 21 by overflowing from the overflow pipe 46 by the water sent out by the second water supply pipe 42. In step 132, the control device 50 determines whether or not the cleaning water in the water storage unit 21 has reached the cleaning water level L1 by the detection of the float switch 31a. While the control device 50 repeatedly determines “NO” until the cleaning water in the water storage unit 21 reaches the cleaning water level L1, the cleaning water in the water storage unit 21 becomes the cleaning water level L1 and an ON signal is output from the float switch 31a. If it is input, “YES” is determined, and the process proceeds to step 133. In step 133, the control device 50 closes the second water supply valve 43 and ends the hot water supply process.

  Next, in the cleaning process in the hot water disinfection cleaning process, the controller 50 first sets the rotational speed of the cleaning pump 28 to 20% from the rated output (maximum rotational speed in normal operation) by the cleaning pump control unit 51 in step 134. Reduce and drive for 20 seconds. Next, in step 135, the controller 50 causes the cleaning pump controller 51 to reduce the rotational speed of the cleaning pump 28 from the rated output (maximum rotational speed in normal operation) to 50% and drive it for 40 seconds. Washing water of hot water in the water storage unit 21 is sent to the washing nozzles 25 and 26 via the circulation pipe 27, and the washing nozzles 25 and 26 spray the washing water onto the medical instrument with a weak momentum while rotating. When the cleaning water made of hot water is jetted, the rotational speed of the cleaning pump 28 is lowered and driven, so that a rapid increase in the temperature in the cleaning tank 20 can be suppressed. As a result, the pressure in the cleaning tank 20 is reduced. As a result, the air in the washing tank 20 is not exhausted vigorously from the exhaust port 20a. Thereby, the washing water sprayed by the washing nozzles 25 and 26 in the washing tank 20 does not scatter to the outside from the exhaust port 20a.

  Next, in step 136, the control device 50 drives the cleaning pump 28 at a rated output (maximum number of rotations in normal operation) for 10 minutes. Washing water of hot water in the water storage unit 21 is sent to the cleaning nozzles 25 and 26 via the circulation pipe 27, and the cleaning nozzles 25 and 26 rotate while spraying the cleaning water made of hot water onto the medical device. Is disinfected by washing water made of hot water. After the hot water disinfection cleaning process, the control device 50 drives the drain pump 30 for 30 seconds to discharge the cleaning water in the water storage unit 21 from the drain pipe 29 in step 137. When this hot water disinfection cleaning process is completed, the cleaning program including the pre-cleaning process, the main cleaning process, the rinsing cleaning process, and the hot water disinfection cleaning process ends.

  Since the cleaning device 10 configured as described above is installed in a facility where a hot water supply source such as a water heater is not provided, cleaning water made of hot water cannot be directly sent to the cleaning tank 20. For this reason, when cleaning water made of water is used in the rinsing cleaning process, the temperature difference in the cleaning tank when shifting from the rinsing cleaning process to the hot water disinfection cleaning process becomes too large, and the cleaning pump control unit 51 Even if the rotational speed of the cleaning pump 28 is reduced to 20% and 50% of the rated output, the temperature in the cleaning tank 20 suddenly rises and the pressure increases, and the cleaning water is discharged from the exhaust port 20a at the top of the cleaning tank 20. Could scatter. In order to cope with this, it has been considered to control the rotation speed of the cleaning pump 28 to be lower than 20% of the rated output by the cleaning pump control unit 51. The number of revolutions of the pump 28 could not be reduced any more.

  In the cleaning apparatus 10 configured as described above, when the rinsing cleaning process is executed, the cleaning water supply means uses cleaning water in which water from the first water supply pipe 34 and hot water from the hot water supply apparatus 40 are mixed. Rinsing and washing were performed. By doing in this way, the temperature difference between the washing water in the rinsing washing process and the washing water made of hot water in the hot water disinfection washing process could be reduced. Thereby, even if cleaning water is sprayed into the cleaning tank 20 from the cleaning nozzles 25 and 26 (in a state where the number of rotations of the cleaning pump 28 is reduced to 20% and 50% of the rated output by the cleaning pump control unit 51). In addition, it was possible to suppress an increase in pressure due to a sudden rise in the temperature in the cleaning tank 20 and to prevent the cleaning water from splashing from the exhaust port 20a at the top of the cleaning tank 20. Moreover, since the rise in pressure due to the rapid rise in the temperature in the cleaning tank 20 could be suppressed, the float switches 31a and 32a in the water level detection tanks 31 and 32 connected to the cleaning tank 20 I was able to eliminate accidental turning on.

  In said embodiment, although the medical instrument was demonstrated as a to-be-cleaned apparatus, this invention is not limited to this, You may wash | clean instruments, such as tableware.

  In the above-described embodiment, conditions such as various temperatures (including set temperature) such as cleaning water are described as examples, and are not limited to these temperatures.

  In the above embodiment, the cleaning program includes the pre-cleaning process, but the present invention is not limited to this, and the main cleaning process, the rinsing cleaning process, and the hot water disinfection cleaning process are included without including the pre-cleaning process. Any cleaning program can be used.

  In the above embodiment, when performing the water supply and hot water supply processing in the rinsing cleaning step, approximately equal amounts of water and hot water are sent from the first water supply pipe 34 and the hot water supply device 40 into the cleaning tank 20. However, the present invention is not limited to this, and when the temperature of a water supply source such as a water supply is low, the amount of hot water delivered from the hot water supply device 40 is the amount of water delivered from the first water supply pipe 34. The amount of hot water delivered from the hot water supply device 40 may be less than the amount of water delivered from the first water supply pipe 34 when the temperature of a water supply source such as water supply is high.

  DESCRIPTION OF SYMBOLS 10 ... Cleaning apparatus, 20 ... Cleaning tank, 21 ... Water storage part, 25, 26 ... Cleaning nozzle, 28 ... Cleaning pump, 33 ... Detergent supply apparatus, 40 ... Hot water supply apparatus, 41 ... Hot water storage tank, 50 ... Control apparatus, 51 ... cleaning pump controller.

Claims (1)

A water storage section for storing objects to be cleaned and storing cleaning water at the bottom, and a cleaning tank having an exhaust port at the top;
A hot water supply device having a hot water storage tank that heats water sent from a water supply source and stores it as hot water;
Washing water supply means for supplying cleaning water comprising at least one of water sent from the water supply source and hot water sent from the hot water supply device to the water storage unit,
A detergent supply device for supplying detergent into the washing tank;
A cleaning nozzle that ejects cleaning water of 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;
The main cleaning step of adding the detergent supplied from the detergent supply device to the cleaning water supplied from the cleaning water supply means, and spraying the cleaning liquid containing the detergent from the cleaning nozzle onto the object to be cleaned by the cleaning pump. A rinsing washing step in which washing water supplied from the washing water supply means after the main washing step is sprayed from the washing nozzle onto the object to be washed by the washing pump, and the washing water after the rinsing washing step. A control device having a cleaning program for performing a hot water disinfection cleaning step of spraying cleaning water made of hot water supplied by a supply means from the cleaning nozzle onto an object to be cleaned by the cleaning pump and performing hot water disinfection cleaning step;
The control device has a pump rotation speed control unit that controls the rotation speed of the cleaning pump and adjusts the amount of water discharged from the cleaning pump;
The control device is a cleaning device that is controlled by the pump rotation speed control unit to reduce the rotation speed of the cleaning pump for a predetermined time when the hot water disinfection cleaning process is executed,
A cleaning apparatus characterized in that when the rinsing process is executed, rinsing is performed using cleaning water obtained by mixing water and hot water with the cleaning water supply means.

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