JP4123326B2 - Method and apparatus for supplying sterile hot water - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention generally includes sterile hot water (In this specification, “sterile hot water” refers to hot water in which an amount of chlorine remains to the extent that sterilization power is not lost. )More specifically, the present invention relates to a method and apparatus for supplying sterile hot water mainly used in hospitals.
[0002]
[Prior art]
  In hospitals, sterile hot water is used in many places from the viewpoint of hygiene or prevention of nosocomial infections.
  For example, in the operation preparation room, delivery room, newborn room, premature baby room, emergency resuscitation room, etc., the concerned person cleans hands and arms, prepares liquid food for other patients after the operation, and milk for infants Sterile hot water is used to prepare and supply catheters.
[0003]
  A conventional method and apparatus for supplying sterile hot water will be described with reference to FIG.
  Hot water is supplied from the central hot water supply pipe in the hospital to the mixer 3 through the hot water supply pipe 2i, and tap water is supplied from the water supply pipe 1a to the mixer 3, and the hot water and tap water are mixed in the mixer 3 at about 35 to 40 ° C. Of warm water. The hot water mixed and prepared in the mixer 3 is sent to the microfilters 9 and 90 in order, filtered, and supplied to the faucet 5 such as a shower nozzle through the pipe 91 after filtration.
  The hot water supplied from the hot water supply pipe to the mixer 3 is obtained by heating tap water with a boiler, but the amount of residual chlorine is almost eliminated by heating for a long time.
  Also, the microfilters 9, 90 are insideFor example, a porous hollow fiber membrane made of polyethylene is used as the filtration membrane.The hot water filtered by such a filtration membrane is good in terms of water quality because ionized calcium compounds and organic substances are removed.On the filtration membraneDuring the filtration, sodium hypochlorite added to tap water for sterilization is also removed. Accordingly, the sterilizing power or sterilizing power in the pipe from the microfilter 9 to the tap 5 is lost, and harmful bacteria are easily propagated in the pipe to generate a bacterial group.
  Due to the circumstances as described above, an ultraviolet sterilizer 92 is installed in the pipe 91 or an apparatus for adding sodium hypochlorite in order to prevent the generation and propagation of bacteria in the pipe 91 from the microfilter 9 to the tap 5. Or have installed.
[0004]
[Problems to be solved by the invention]
  However, the installation of the UV sterilizer 92 in the pipe 91 is expensive and it is difficult to completely prevent contamination.
  Also, the installation of the sodium hypochlorite addition device in the pipe 91 requires a mechanism for adjusting the addition amount corresponding to the flow rate of the hot water, so that the equipment becomes extremely expensive.
  Furthermore, when the ultraviolet sterilizer 92 or sodium hypochlorite addition device is installed, periodic maintenance of these devices is necessary, and the running cost increases due to an increase in maintenance costs.
  An object of the present invention is to provide a method for supplying aseptic hot water that can supply complete aseptic hot water at a lower cost by devising so that the sterilization power in the supply pipe is not lost.
  Another object of the present invention is to provide a supply device that can smoothly carry out the above-described method for supplying sterile hot water.
[0005]
[Means for Solving the Problems]
  The supply method of aseptic hot water according to the present invention is configured as follows to solve the above-described problems.
  That is, the method for supplying sterile hot water according to claim 1 is:Tap waterChlorine amount remains so that sterilization power is not lostFiltering and the filtered tap waterChlorine amount remains so that sterilization power is not lostFilteredMix with the heated tap waterAseptic hot waterAnd obtaining the aboveAseptic hot waterAnd a step of supplying the tap water to the faucet, and controlling to stop the heating of the tap water when the water from the faucet stops.
  In the present invention, the state in which the amount of chlorine that does not lose sterilization power remains is when the residual concentration of free chlorine is at least 0.3 ppm or more, preferably 0.4 ppm or more.
[0006]
  The method for supplying sterile hot water according to claim 2 comprises:Tap waterChlorine amount remains so that sterilization power is not lostFiltering and the filtered tap waterChlorine amount remains so that sterilization power is not lostFilteredMix with the heated tap waterAseptic hot waterAnd obtaining the aboveAseptic hot waterIn a state where the amount of chlorine remains so that the sterilization power is not lost.FilterProcess,The filtered sterile hot waterAnd a step of supplying the tap water to the faucet, and controlling to stop the heating of the tap water when the water from the faucet stops.
[0007]
  The aseptic hot water supply apparatus according to the present invention is configured as follows in order to solve the above-described problems.
  That is,Claim 3The sterile hot water supply device described is
  Tap waterChlorine amount remains so that sterilization power is not lostFilters 1 and 10 for filtering,
  Tap water filtered with the filter and filtered with the filterFurthermore, mix with tap water heated by the heat exchanger 2Aseptic hot waterA mixer 3 to obtain
  A faucet 5 communicated with the water outlet of the mixer 3;
  The heat exchanger 2 isSaidControl is made so that the operation is stopped when water from the faucet 5 stops.
[0008]
  Claim 4The sterile hot water supply device described in
  Tap waterChlorine amount remains so that sterilization power is not lostFilters 1 and 10 for filtering,
  Tap water filtered with the filter and filtered with the filterFurthermore, mix with tap water heated by the heat exchanger 2Aseptic hot waterA mixer 3 to obtain
  Communicated to the water outlet of the mixer 3, and obtained by the mixer 3Aseptic hot waterA hot water filter 4 for further filtering the sterilizing power to a state where a chlorine amount remains such that sterilization power is not lost,
  SaidHot waterA faucet 5 communicated with the water outlet of the filter 4;
  The heat exchanger 2 is controlled so that its operation is stopped when water from the faucet 5 stops.
[0009]
  Claim 5The sterile hot water supply device described in
  Tap waterChlorine amount remains so that sterilization power is not lostFilters 1 and 10 for filtering,
  Tap water filtered with the filter and filtered with the filterFurthermore, mix with tap water heated by the heat exchanger 2Aseptic hot waterA mixer 3 to obtain
  Communicated to the water outlet of the mixer 3, and obtained by the mixer 3Aseptic hot waterA hot water filter 4 for further filtering the sterilizing power to a state where a chlorine amount remains such that sterilization power is not lost,
  SaidHot waterA faucet 5 communicated with the outlet of the filter 4;
  SaidHot waterThe outlet of the filter 4 andSaidIt is provided with a bypass pipe 31 that communicates the middle of the pipe 40 that communicates with the faucet 5 and the water outlet of the mixer 3;
  Flows from the mixer 3 through the hot water filter 4 to the faucet 5AsepticFlows from the hot water and the mixer 3 to the faucet 5 via the bypass pipe 31AsepticIt is configured to be switchable with the hot water flow path
  The heat exchanger 2 is controlled so that its operation is stopped when water from the faucet 5 stops.
[0010]
  Claim 6The sterile hot water supply device according to claim 3 is the sterile hot water supply device according to claim 3 or 42, wherein a proximity sensor 50 is installed in the vicinity of the faucet 5 so that the hot water filter 4 and the faucet 5 communicate with each other. The pipe 40 is provided with an automatic valve 6 that opens and closes in response to the operation of the proximity sensor 50.
[0011]
  Claim 7The sterile hot water supply device according to claim 5 is the sterile hot water supply device according to claim 5, wherein a proximity sensor 50 is installed in the vicinity of the faucet 5, and the hot water filter 4 and the faucet 5 communicate with each other. Is characterized in that an automatic valve 6 that opens and closes in response to the operation of the proximity sensor 50 is installed on the downstream side of the connection portion with the bypass pipe 31.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  With reference to FIGS. 1 to 5, an embodiment of a sterile hot water supply apparatus and a sterile hot water supply method using the apparatus according to the present invention will be described.
    First embodiment
  FIG. 1 is a schematic piping diagram for explaining a first embodiment of a method and apparatus for supplying sterile hot water according to the present invention.
[0013]
  a is a case in which the main part of the apparatus of this embodiment is accommodated, and the upper part a1 of this case a is an instrument storage case.
  Reference numeral 1 denotes a filter for purifying tap water. The filter 1 includes a primary filter 11 having a coarse filter such as a 3 micron filter and a secondary filter having a denser filter such as a 1 micron filter. And the container 12.
  The inlet of the primary filter 11 is connected to a stainless steel water pipe 1a having a pressure reducing valve 13 and a valve 14, and the outlet of the primary filter 11 and the inlet of the secondary filter 12 are made of stainless steel pipe 1b. It is communicated by.
[0014]
  The water outlet of the secondary filter 12 is communicated with the water inlet of the heat exchanger 2 through a stainless steel pipe 1c, and is also communicated with one water inlet of the mixer 3 through a branch pipe 1d branched from the pipe 1c. ing.
  The water outlet of the heat exchanger 2 communicates with the other water inlet of the mixer 3 through a stainless steel pipe 20.
  The mixer 3 has a structure in which the temperature can be set in a range of 20 to 100 ° C., and mixes water flowing in from one water inlet and hot water flowing in from the other water inlet to prepare hot water matching the set temperature. can do.
[0015]
  The water outlet of the mixer 3 is communicated with a water inlet of the heat-resistant hot water filter 4 having a 0.3 to 0.5 micron filter (in this embodiment, a 0.5 micron filter) through a stainless steel pipe 30; A plurality of faucets 5 such as a shower nozzle are communicated with a water outlet of the hot water filter 4 by a pipe 40 made of a sanitary (stainless steel) pipe.
  A pressure switch 7 is installed in the middle of the pipe 40.
[0016]
  The apparatus for supplying sterile hot water of this embodiment is downstream of the pressure switch 7 in the pipe 40 so that a plurality of persons working in, for example, an operating room in a hospital or the like can wash hands and arms at the same time. An automatic valve 6 is installed at a position, and a proximity sensor (proximity switch) 50 is installed in the vicinity of the faucet 5. For example, when a hand approaches any one of the faucets 5, the automatic valve 6 opens and water is discharged from each faucet 5 all at once. Is configured to do.
  A hot air is supplied to the terminal pipe section 40a downstream of the automatic valve 6 of the pipe 40 communicating with the hot water filter 4 and the faucet 5 by heating the outside air to the terminal pipe section 40a closer to the automatic valve 6 Hot air supply piping 61 is connected via a valve 63.
  In this embodiment, a fan (dryer) 62 with a heater installed in the hot air supply pipe 61 heats the outside air taken in from the outside air intake port at the end of the pipe 61 through the sterilization filter 64, and the hot air ( 40 to 50 ° C.) is sent to the terminal piping section 40a.
  The valve 63 opens and closes in conjunction with a check valve that prevents inflow into the hot air supply pipe 61 or a motor (not shown) of the fan 62 with a heater (opens by the operation of the motor of the fan 62 and operates the motor). A motor valve is used that closes when stopped.
[0017]
  The primary pressure gauge 15 and the secondary pressure gauge 41 are communicated with the piping 40 on the outlet side of the secondary filter 12 in the filter 1 and the outlet side of the hot water filter 4 by a stainless steel sanitary piping, respectively. A thermometer 42 is connected to the pipe 40 on the outlet side of the filter 4 by a sanitary pipe made of stainless steel.
[0018]
  A heat source supply pipe 2a to which a heat source is supplied from the heat source pipe 2d communicates with the heat exchanger 2, and a heat source return pipe 2b communicates with the heat source 2 so that the heat source supplied to the heat exchanger 2 is returned to the heat source pipe 2d. The valves 23 and 24 are attached to the heat source supply pipe 2a and the heat source return pipe 2b, respectively.
  In this embodiment, hot water flowing through a central hot water supply pipe installed in a hospital or the like is used as the heat source of the heat exchanger 2, and the heat exchanger 2 is installed in the heat source supply pipe 2a or the heat source return pipe 2b. The pump 21 is configured to supply hot water from the hot water supply pipe.
  The heat source supply pipe 2a and the heat source return pipe 2b are configured to be directly communicated with each other by a bypass pipe 2c via a switching valve 22 including a three-way valve before the heat exchanger 2.
[0019]
  Reference numeral 8 denotes a control box in which a control device is installed. The control device of the control panel 8 includes a detection output of the proximity sensor 50 installed in the vicinity of the faucet 5 and a pressure switch 7 installed in the middle of the pipe 40. Are configured to be input.
  Reference numeral 80 denotes a power source.
[0020]
  The operation of the sterile warm water supply device according to the first embodiment will be described together with an example of the supply method according to the present invention.
  FIG. 1 shows a state in which a plurality of parties are washing hands and arms, and sterile hot water is supplied from all the faucets 5, and therefore, by a pump 21 and a switching valve 22 in the pipe, Hot water flowing through the heat source pipe 2d flows from the heat source supply pipe 2a through the heat exchanger 2 to return to the heat source pipe 2d through the heat source return pipe 2b.
  The tap water supplied from the water supply pipe 1a is adjusted to a water pressure of about 2 kg / cm @ 2 by the pressure reducing control valve 13, is primarily filtered by the primary filter 11 having a 3 micron filter, and then is subjected to a secondary filtration having a 1 micron filter. Filtered by a vessel 12.
  The tap water is sequentially filtered by the primary filter 11 and the secondary filter 12, so that the suspended matter and organic matter in the chlorine are removed without reducing the chlorine content to such an extent that the sterilization power is lost. Purified.
  The tap water and the hot water flow due to the constant water pressure of the tap water adjusted by the pressure reducing adjustment valve 13.
[0021]
  A part of the tap water filtered in order by the primary filter 11 and the secondary filter 12 is supplied to one water inlet of the mixer 3, and the other part is supplied to the heat exchanger 2. It is heated by the exchanger 2 and supplied to the other water inlet of the mixer 3. The heated tap water and the cold tap water are prepared so as to become hot water having a set temperature by being mixed in the mixer 3 at a predetermined ratio.
  The hot water mixed and prepared in the mixer 3 is sent to the hot water filter 4 having heat resistance through the pipe 30, and is filtered through a 0.5 micron filter in the hot water filter 4. Is captured.
0. The warm water filtered with a filter of about 5 microns is maintained at, for example, at least about 0.5 ppm so that the residual chlorine (free chlorine) concentration maintains the sterilizing power.
The purified hot water is supplied to the faucet 5 through the pipe 40.
[0022]
  When the person concerned who has been washed away from each faucet 5, the proximity sensor 50 detects this, and with this detection, the automatic valve 6 is closed by the control device in the control box 8, and water discharge from each faucet 5 is stopped. To do.
  When the automatic valve 6 is closed, the pressure switch 7 detects a change in the pressure in the pipe 40 (water pressure disappears), and the control device operates so that the switching valve 22 communicates with the bypass pipe 2c with this detection. The heat source supply pipe 2a and the heat source return pipe 2b are directly communicated with each other via the bypass pipe 2c, so that the hot water supply to the heat exchanger 2 is stopped, so that the operation of the heat exchanger 2 is stopped and at the same time, the operation of the pump 21 is also stopped. Is done.
  As described above, in a state in which the automatic valve 6 is closed and the water discharge from the faucet 5 is stopped, outside air enters the terminal pipe portion 40a on the downstream side of the automatic valve 6 through each faucet 5, and as time passes. Since there is a possibility that the terminal piping part 40a is contaminated (back-contaminated) by bacteria, the fan 62 with heater is operated, and the sterilized hot air is continuously supplied from the hot air supply pipe 61 into the terminal piping part 40a. Prevent bacterial contamination within 40a.
  The fan 62 with heater can be configured to start operation when the automatic valve 6 is closed and to stop operation when the automatic valve 6 is opened, for example, by control of a control device in the control box 8 or other control. .
[0023]
  When the operation of the fan 62 with heater is stopped and a hand is brought close to use any one of the faucets 5, the proximity sensor 50 detects this, and the automatic valve 6 is opened and hot water is supplied from the faucet 5.
  When the automatic valve 6 is opened, the pressure switch 7 detects a pressure change in the pipe 40. With this detection, the pump 21 and the pressure reducing adjustment valve 13 are activated by the control of the control device, and the switching valve 22 is The heat exchanger 2 communicates with the heat exchanger 2 from the bypass pipe 2c side, and the heat exchanger 2 starts operating.
[0024]
  The clogged state of the filter of the filter 1 (in this embodiment, the primary filter 11 and the secondary filter 12) is caused by the primary pressure gauge 15, and the clogged state of the filter of the hot water filter 4 is given by the secondary pressure gauge 41, respectively. Checked. When the detected pressure of the pressure gauge 15 falls below a predetermined set value, the filters of the primary filter 11 and the secondary filter 12 are replaced, and when the detected pressure of the pressure gauge 41 falls below a predetermined set value. The filter of the hot water filter 4 is replaced.
  When the detected pressure of the pressure gauge 15 or the pressure gauge 41 falls below a predetermined set value, it can be configured to display a warning not only in the pressure gauges 15 and 41 but also in other places.
[0025]
  According to the method for supplying sterile hot water according to the embodiment, first, tap waterFiltrationTreatment and hot waterFiltrationThe treatment is performed so that the amount of chlorine remains to the extent that sterilization power is not lost, and is controlled to stop the heating of tap water when the water from the faucet stops (the heating state continues for a long time) In other words, the heated tap water does not lose chlorine), so the hot water supplied from the tap 5 still has sterilization power.
  As described above, since the sterile hot water after the purification treatment maintains the sterilizing power, the generation and propagation of bacteria can be prevented in the water passage including the pipe 40 and the tap 5.
[0026]
  Secondly, since it is not configured to sterilize in the middle of the pipe after sterilization treatment, the equipment cost is significantly lower than that of the conventional method, and maintenance is accompanied by the installation of sterilization means after sterilization treatment. The running cost is greatly reduced.
  Third, tap water before mixingFiltrationAnd tap water before heatingFiltrationAre performed by the same filtration process, the piping configuration is simplified and the apparatus can be miniaturized.
  Fourthly, the tap water filtration step includes a primary filtration step with a coarse filter and a secondary filtration step with a dense filter, so that the filter can be clogged slowly and its life can be extended.
  Fifth, the hot water prepared by mixingFiltrationTherefore, the warm water flowing out from the tap 5 is not only used when the person concerned cleans hands and arms, but also prepares liquid food for the patient, prepares milk for infants, or supplies a catheter. Also suitable for.
[0027]
  According to the aseptic hot water supply apparatus according to the embodiment, first, the supply direction having the above-described effects can be smoothly implemented.
  Second, the proximity sensor 50 is installed in the vicinity of the faucet 5, and the automatic valve 6 that opens and closes by the detection of the proximity sensor 50 is installed in the pipe 40 that communicates the hot water filter 4 and the faucet 5. The automatic operation is possible without the person touching the faucet, and the person does not touch the faucet 5 and is extremely hygienic.
  Thirdly, in a state where the automatic valve 6 is closed and the water discharge from the faucet 5 is stopped, outside air enters the terminal pipe portion 40a on the downstream side of the automatic valve 6 through each faucet 5 and the terminal pipe portion is passed over time. 40a may be contaminated (back-contaminated) by bacteria. However, since the hot air supply pipe 61 is connected to the terminal pipe section 40a downstream of the automatic valve 6 in the pipe 40 via the valve 63, hot air is supplied from the hot air supply pipe 61 into the terminal pipe section 40a. By continuously supplying to the terminal pipe, bacterial contamination in the terminal pipe section 40a can be prevented.
  Fourth, since a hot water supply pipe that is always installed in a hospital or the like is used as a heat source of the heat exchanger 2, no new equipment for supplying the heat source to the heat exchanger 2 is required. Further, since the heat source supply pipe 2a and the heat source return pipe 2b are directly communicated by the operation of the switching valve 22 when the water discharge from each faucet 5 is stopped, the control of the operation of the heat exchanger 2 is accurate. Simple.
[0028]
    Second embodiment
  FIG. 2 is a schematic piping diagram for explaining a second embodiment of the method and apparatus for supplying sterile hot water according to the present invention.
  This embodiment is a configuration suitable only when a person concerned cleans hands and arms all at once, such as before surgery.FiltrationAfter tap waterFiltrationIt mixes with the hot water which heated the later tap water, and after preparing the warm water of suitable temperature, it is comprised so that the said warm water may be supplied to the faucet 5 without filtering again.
  Therefore, in the sterile hot water supply device of this embodiment, the hot water filter 4 in the device of the first embodiment and the secondary pressure gauge 41 for detecting the water pressure on the outlet side of the hot water filter 4 are not installed, The water outlet of the mixer 3 is communicated with the faucet 5 by a pipe 40.
  The other configurations, operations, and effects of the sterile hot water supply method and supply apparatus of the second embodiment are substantially the same as those of the sterile hot water supply method and supply apparatus of the first embodiment, and thus the description thereof is omitted.
[0029]
  Third embodiment
  FIG. 3 is a schematic piping diagram for explaining a third embodiment of the sterile hot water supply apparatus according to the present invention.
  In this embodiment, the outlet of the mixer 3 is communicated with the inlet of the hot water filter 4 by the pipe 30, the outlet of the hot water filter 4 is communicated with the plurality of faucets 5 by the pipe 40, and the bypass pipe 31 is used. The water outlet of the mixer 3 and the pipe 40 are connected.
  And the flow path of the hot water which flows into the faucet 5 from the mixer 3 through the hot water filter 4 by the valve | bulb 43 attached to the water inlet side or the water outlet of the hot water filter 4 and the valve 32 installed in the bypass piping 31. And the flow path of the hot water flowing from the mixer 3 through the bypass pipe 31 to the faucet can be switched.
  In this embodiment, instead of attaching the valve 43 and the valve 32, a switching valve composed of a three-way valve is installed at a connection portion between the bypass piping 31 and the piping 30 or a connection portion between the bypass piping 31 and the piping 40. be able to.
  A pressure switch 7 and an automatic valve 6 are sequentially installed downstream of the connection portion of the pipe 40 with the bypass pipe 31 in the middle of the pipe 40 that communicates the hot water filter 4 and each faucet 5. A hot air supply pipe 61 for heating the outside air to the terminal pipe section 40a and supplying hot air to the terminal pipe section 40a on the downstream side of the automatic valve 6 is connected to the terminal pipe section 40a on the downstream side of the automatic valve 6 via a valve 63. .
[0030]
  According to the third embodiment, for example, when a person concerned cleans hands and arms all at once before surgery, the valve 43 is closed and the valve 32 is opened, and the hot water prepared by the mixer 3 is used as the hot water filter 4. The water is discharged from the faucet 5 without passing through.
  On the other hand, when preparing a liquid food, preparing milk for infants, or supplying a catheter, warm water prepared by the mixer 3 is filtered by the hot water filter 4 and discharged from the faucet 5.
  Thus, since the warm water prepared with the mixer 3 can be used according to a use by operation of the valves 43 and 32, the filter life of the warm water filter 4 can be maintained for a long time.
  Since other configurations, operations, and effects of the apparatus of the third embodiment are the same as those of the sterile hot water supply apparatus of the first embodiment, description thereof is omitted.
[0031]
  Fourth embodiment
  FIG. 4 is a schematic piping diagram for explaining a fourth embodiment of the sterile hot water supply apparatus according to the present invention.
  The aseptic hot water supply apparatus according to this embodiment is suitable for supplying hot water by opening a large number of taps 5 at the same time, for example, several tens, and the heat source supply pipe 2a from the heat source pipe 2d through which steam flows. Thus, the steam is supplied to the heat exchanger 2, and the steam is returned to the heat source pipe 2d by the heat source return pipe 2b.
  Since most of the configuration of the sterile hot water supply apparatus is substantially the same as that of the apparatus of the first embodiment, only the configuration different from the apparatus of the first embodiment will be mainly described.
[0032]
  In the middle of the heat source supply pipe 2a, a steam pressure gauge 25 and a pressure adjustment pipe 2f are provided in this order.
  The pressure adjusting pipe 2f is provided with a first steam valve 26, a control electromagnetic valve 26a, a pressure reducing adjusting valve 26b, and a second steam valve 26c in this order. When the automatic valve 6 of the pipe 40 is opened, the steam valve is provided. 26 and 26b are opened, and the pressure reducing adjustment valve 26b adjusts the vapor pressure to about 1 kg / cm @ 2 under the control of the control electromagnetic valve 26a, and supplies the vapor to the heat exchanger 2.
  The pressure adjustment pipe 2f communicates with the heat source return pipe 2b by a steam bypass pipe 2h between the pressure reduction adjustment valve 26b and the second steam valve 26c, and a safety pressure gauge is provided in the middle of the steam bypass pipe 2h. 28 and a safety valve 28a are sequentially installed. If the pressure is not properly reduced by the pressure reducing valve 26b and the safety pressure gauge 28 detects 1 kg / cm @ 2 or more (e.g. 1.2 kg / cm @ 2), the safety valve 28a is opened and excess steam is returned to the heat source return pipe 2b. It is like that.
  In the heat source return pipe 2b, a check valve 29 for preventing the backflow of steam is installed on the upstream side of the connecting portion with the bypass pipe 2h.
[0033]
  In the middle of the heat source supply pipe 2a, there is provided an alternative pipe 2g that communicates the position upstream from the first steam valve 26 and the position downstream from the second steam valve 26c. A steam valve 27 is installed.
  With this configuration, when the control electromagnetic valve 26a or the pressure reducing adjustment valve 26b fails, the steam valve 26, 26c of the pressure adjusting pipe 2f is closed and the steam valve 27 is opened to replace the alternative pipe 2g. The steam can be supplied to the heat exchanger 2 through.
  Further, the position upstream of the steam valves 26 and 27 of the heat source supply pipe 2a is connected to the heat source return pipe 2b by the drain pipe 2e, and excess steam that is not supplied to the heat exchanger 2 passes through the drain pipe 2e. It is configured to flow to the return pipe 2b.
  Reference numeral 29 denotes a drain valve.
[0034]
  In this embodiment, a bypass pipe 35 that connects the vicinity of the inlet of the hot water filter 4 and the vicinity of the outlet is provided via valves 36 and 37, respectively, and a valve 38 is installed in the bypass pipe 35. Has been.
  A pipe 30 that connects the mixer 3 and the hot water filter 4 is provided with a valve 34 in the vicinity of the water outlet of the mixer 3, and a pipe that connects the water outlet of the heat exchanger 2 and the water inlet of the mixer 3. In the middle of 20, the bypass pipe 20 a communicates with a position downstream of the valve 34 of the pipe 30, and the bypass pipe 20 a is provided with a valve 33.
  With such a configuration, when the apparatus is used, the valves 34, 36 and 37 are closed, the automatic valve 6 is manually opened and the valves 33 and 38 are opened, and hot water heated by the heat exchanger 2 is connected to the pipe 20. By flowing from each tap 5 through the bypass pipes 20a and 35 and the pipe 40, the inside of the pipe 40 including the terminal pipe section 40a can be heat sterilized.
[0035]
  In the fourth embodiment, even when the bypass pipe 20a and the valves 33 and 34 are not provided, when the apparatus is used, the valves 36 and 37 are closed, the automatic valve 6 and the valve 38 are opened, and the adjustment temperature of the mixer 3 is set to 100. By setting the temperature to ° C., the inside of the pipe 40 can be heat sterilized.
  Moreover, it replaces with providing the valves 36, 37, and 38, and it implements, even if it installs a three-way valve and other switching valves in the connection part of the piping 30 and the bypass piping 35 or the connection part of the piping 40 and the bypass piping 35. be able to. In this case, instead of the valve 33 of the bypass pipe 20a, a three-way valve or other switching valve may be installed at the connection part between the bypass pipe 20a and the pipe 20 or the connection part between the bypass pipe 20a and the pipe 30.
  The other operations and effects of the aseptic hot water supply device according to the fourth embodiment are substantially the same as those of the device according to the first embodiment, and a description thereof will be omitted.
[0036]
  Fifth embodiment
  FIG. 5 is a partial piping diagram for explaining a fifth embodiment of the sterile hot water supply apparatus according to the present invention.
  In this embodiment, the tap water supplied from the water supply pipe 1a having the pressure reducing valve 13 and the valve 14 is filtered by one filter 1 and supplied to the heat exchanger 2, and similarly, the pressure reducing valve 13 and the valve are supplied. The tap water supplied from the water pipe 1a ′ having 14 is filtered by another filter 10 on the other side.Mixer3 is configured to be supplied to 3.
  The filters 1 and 10 are each composed of a primary filter 11 and 10a of a 3 micron filter and a secondary filter 12 and 10b of a 1 micron filter, and a chlorine amount that does not lose sterilization power remains. So that the tap water is filtered.
  Moreover, the switching valve 22 which consists of a three-way valve is installed in the hot-water supply outgoing pipe 2a side.
  Other configurations are substantially the same as those in the first embodiment.
  The apparatus of this embodiment has substantially the same operations and effects as those of the first embodiment except that the structure is slightly complicated.
[0037]
  Other embodiments
  As described above, the heat source of the heat exchanger 2 may be a heat source using electric power, gas, oil, or the like, in addition to using hot water in the hot water supply pipe or steam in the steam pipe. Although it is preferable to use stainless steel for the piping, it can also be carried out using a plastic tube.
  Further, depending on the specific conditions at the site of use, a proximity sensor and an automatic valve can be installed for each faucet 5.
[0038]
【The invention's effect】
  According to the method for supplying sterile hot water according to the invention of claim 1, tap water is provided.Filtration treatmentIs controlled in such a way that the amount of chlorine remains so as not to lose sterilization power, and is controlled to stop the heating of tap water when the water from the faucet stops (a tap heated by prolonged heating). Therefore, the hot water supplied from the tap 5 still has sterilization power. As described above, since the sterile hot water after the purification treatment maintains the sterilizing power, the generation and propagation of bacteria can be completely prevented in the water passage including the pipe 40 and the tap 5.
  Since the structure is not sterilized in the middle of the piping, the equipment cost can be greatly reduced compared to the conventional method, and the maintenance cost associated with the installation of sterilization means is not required, and the running cost can be greatly reduced. .
[0039]
  According to the method for supplying sterile hot water according to the invention of claim 2,After filtrationWith tap waterFiltration treatmentAnd mix the heated tap waterSterile hot waterAnd then furtherFiltration treatmentAs a result, more purified sterile hot water is supplied, not only for washing hands and arms, but also for preparing liquid foods for infants, preparing milk for infants, or supplying catheters It is also suitable for this.
[0040]
  Claim 3According to the sterile warm water supply device according to the invention, the supply method according to the invention of claim 1 can be carried out reliably and smoothly.
[0041]
  Claim 4According to the sterile warm water supply device according to the invention, the supply method according to the invention of claim 2 can be carried out reliably and smoothly.
[0042]
  Claim 5According to the aseptic hot water supply apparatus according to the invention, it is provided with the middle of the pipe 40 communicating the water outlet of the hot water filter 4 and the faucet 5 and the bypass pipe 31 communicating the water outlet of the mixer 3. Since the flow path of the hot water flowing from the vessel 3 to the faucet 5 via the hot water filter 4 and the flow path of the hot water flowing from the mixer 3 to the faucet via the bypass pipe 31 are switchable, the invention of claim 1 The aseptic hot water supply method according to the present invention and the aseptic hot water supply method according to the invention of claim 2 can be selectively implemented.
[0043]
  Claims 6 and 7According to the aseptic hot water supply apparatus according to the invention, the proximity sensor 50 is installed in the vicinity of the faucet 5, and the pipe 40 communicating the hot water filter 4 and the faucet 5 is operated according to the operation of the proximity sensor 50. Since the automatic valve 6 that opens and closes is installed, a hygienic and automatic operation is possible without a person touching the faucet 5.
[Brief description of the drawings]
FIG. 1 is a piping diagram showing a first embodiment of an aseptic hot water supply apparatus according to the present invention.
FIG. 2 is a piping diagram showing a second embodiment of a sterile hot water supply apparatus according to the present invention.
FIG. 3 is a piping diagram showing a third embodiment of a sterile hot water supply apparatus according to the present invention.
FIG. 4 is a piping diagram showing a fourth embodiment of a sterile hot water supply apparatus according to the present invention.
FIG. 5 is a partial piping diagram showing a fifth embodiment of the sterile hot water supply apparatus according to the present invention.
FIG. 6 is a schematic piping diagram illustrating a conventional sterile hot water supply device.
[Explanation of symbols]
1,10 Filter
11, 10a Primary filter
12, 10b Secondary filter
13 Pressure reducing valve
14 Valve
15 Pressure gauge
1a, 1a 'water pipe
1b, 1c, 1d, 20, 30, 40 Piping
2 Heat exchanger
20a Detour piping
2a Heat source supply pipe
2b Heat source return pipe
2c Bypass pipe
2d heat source piping
2e Drain pipe
2f Pressure adjustment piping
2g Alternative piping
2h Bypass pipe
2i hot water supply pipe
21 Pump
22 Switching valve
23, 24 Valve
25 Steam pressure gauge
26 First steam valve
26c second steam valve
27 Steam valve
28 Safety pressure gauge
28a Safety valve
29 Check valve
29a Drain valve
3 Mixer
31 Bypass piping
32, 33, 34, 36, 37, 38, 43 Valve
35 Detour piping
4 Hot water filter
40a Terminal piping section
41 Pressure gauge
42 Thermometer
5 faucet
50 Proximity sensor
6 Automatic valve
61 Hot air supply piping
62 Fan with heater
63 Valve
64 Sanitization filter
7 Pressure switch
8 Control panel
80 power supply

Claims (7)

A process of filtering tap water to a state in which a chlorine amount remains such that sterilization power is not lost ;
Mixing the filtered tap water and heated tap water so that the amount of chlorine is such that sterilization power is not lost, and obtaining sterile hot water ; and
Supplying the sterile hot water to the faucet,
Controlled to stop heating of the tap water when water from the faucet stops,
Aseptic hot water supply method. A process of filtering tap water to a state in which a chlorine amount remains such that sterilization power is not lost ;
Mixing the filtered tap water and heated tap water so that the amount of chlorine is such that sterilization power is not lost, and obtaining sterile hot water ; and
Further filtering the sterile hot water to a state where a chlorine amount remains such that sterilization power is not lost;
Supplying the filtered sterile hot water to a faucet,
Controlled to stop heating of the tap water when water from the faucet stops,
Aseptic hot water supply method. A filter (1, 10) for filtering the tap water so that the amount of chlorine remains so as not to lose sterilization power ;
A mixer (3) for mixing the tap water filtered by the filter and the tap water filtered by the filter and further heated by the heat exchanger (2) to obtain aseptic hot water ;
A faucet (5) communicated with the water outlet of the mixer (3),
Said heat exchanger (2) is characterized in that activated when the water outlet from the faucet (5) is stopped is controlled to be stopped,
Aseptic hot water supply device. A filter (1, 10) for filtering the tap water so that the amount of chlorine remains so as not to lose sterilization power ;
A mixer (3) for mixing the tap water filtered by the filter and the tap water filtered by the filter and further heated by the heat exchanger (2) to obtain aseptic hot water ;
A hot water filter (4) that is connected to the outlet of the mixer (3) and further filters the sterile hot water obtained by the mixer (3) to a state in which a chlorine amount remains so as not to lose sterilization power. When,
A faucet (5) communicated with the water outlet of the hot water filter (4),
The heat exchanger (2) is controlled to stop its operation when water from the faucet (5) stops.
Aseptic hot water supply device. A filter (1, 10) for filtering the tap water so that the amount of chlorine remains so as not to lose sterilization power ;
A mixer (3) for mixing the tap water filtered by the filter and the tap water filtered by the filter and further heated by the heat exchanger (2) to obtain aseptic hot water ;
A hot water filter (4) that is connected to the outlet of the mixer (3) and further filters the sterile hot water obtained by the mixer (3) to a state in which a chlorine amount remains so as not to lose sterilization power. When,
A faucet (5) in communication with the water outlet of the hot water filter (4);
The hot water strainer and (4) the water outlet and the faucet (5) and the bypass pipe to communicate the water outlet in the middle between the mixer pipe communicating (40) (3) (31), provided with,
Aseptic hot water flow path flows to the faucet (5) through the hot water filter (4) from the mixer (3), sterile warm water flowing said mixer (3) to the faucet through the bypass pipe (31) (5) Configured to be switchable with
The heat exchanger (2) is controlled to stop its operation when water from the faucet (5) stops.
Aseptic hot water supply device.    A proximity sensor (50) is installed in the vicinity of the faucet (5), and a pipe (40) communicating the hot water filter (4) and the faucet (5) is provided for the operation of the proximity sensor (50). The automatic warm water supply device according to claim 3 or 4, characterized in that an automatic valve (6) that opens and closes in response is provided.    A proximity sensor (50) is installed in the vicinity of the faucet (5), and the bypass pipe (31) is connected to the pipe (40) connecting the hot water filter (4) and the faucet (5). 6. An aseptic hot water supply apparatus according to claim 5, wherein an automatic valve (6) that opens and closes in response to the operation of the proximity sensor (50) is installed downstream of the unit.

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