JP2017142000A - Cleaning method of pipeline for reheating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a pipeline for reheating without imparting any adverse effect on a water heater.SOLUTION: In the first step, connection of connection parts 21B, 22B of pipelines 11, 12 for reheating is released from connection parts 21A, 22A of a water heater 2. In the second step, with respect to the connection parts 21B, 22B of the pipelines 11, 12, connection parts 31A, 32A of (branch lines 31, 32 in) a pipeline 30 for cleaning are connected. In the third step, a cleaning liquid is supplied to the pipelines 11, 12 via a pipeline 30 for cleaning, and cleaning is performed. In the fourth step, the connection between the connection parts 21B, 22B of the pipelines 11, 12 and the connection parts 31A, 32A of the pipeline 30 for cleaning is released. In the fifth step, the connection parts 21B, 22B of the pipelines 11, 12 are connected to (the connection parts 21A, 22A of) the water heater 2 again.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for cleaning a piping for additional cooking.

  For the additional cooking of the bathtub, the hot water heater having the additional cooking function and the bathtub are connected by the additional cooking pipe. This additional cooking pipe is composed of two pipes: a feed-side pipe for flowing hot water in the bathtub to the water heater, and a return-side pipe for flowing hot water from the water heater toward the bathtub. Composed.

  In some cases, the additional cooking pipe is made considerably long as about 10 m, and its inner diameter is about 10 mm, which is a very small diameter. For this reason, with long-term use, filth adheres to the inner wall of the piping for additional cooking, and hinders the flow of hot water. In addition, when the additional cooking is performed, some of the filth attached to the inner wall of the additional cooking pipe is peeled off, and the peeled filth flows into the bathtub, causing discomfort to the bather. Sometimes it ends up. And the adhesion of filth to the inner wall of the piping for additional cooking tends to be promoted more because various bathing agents are often mixed in the bathtub.

  For this reason, it is desirable to wash the piping for additional cooking, that is, to remove the dirt attached to the inner wall of the piping for additional cooking. For this reason, in patent document 1, the clean hot water stored in the bathtub is pumped by the pump toward the water heater via the return side pipe, and the hot water passing through the water heater (internal pipe) is sent to the feed side. It has been proposed to perform cleaning using the circulation circuit as it is between the bathtub and the water heater, such as returning from the pipe to the bathtub.

JP 2003-106643 A

  As described in Patent Document 1, cleaning is performed using a circulation circuit between a bathtub and a water heater configured via a re-cooking pipe composed of two pipes as it is. This is preferable in terms of easy supply.

  However, it is not preferable to clean the recirculation circuit that is configured between the bathtub and the water heater while the hot water supply circuit is configured, which is a major cause of damaging the water heater. In other words, the water heater is usually equipped with a pump impeller and a flow meter for circulating hot water for additional cooking, but the pump impeller and the flow meter are damaged by the large pressure from the wash water. It becomes easy to end up. In particular, it is conceivable to operate the water heater in order to smoothly pass the wash water in the water heater. In this case, however, the rotation speed will exceed the speed assumed by the pump, causing damage to the pump. In addition to this, the control system parts (for example, the inverter) for controlling the pump may be damaged. As described above, when the parts inside the water heater are damaged by the cleaning, the water heater itself is effectively replaced.

  The present invention has been made in view of the circumstances as described above, and its purpose is to provide a cleaning method for additional cooking piping that can clean additional piping without adversely affecting the water heater. There is to do.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1,
A method for cleaning a piping for additional cooking that connects a water heater and a bathtub,
A first step of disconnecting the piping for additional cooking at a connection site to the water heater;
After the first step, the second step of connecting the cleaning pipe to the portion of the additional cooking pipe that has been disconnected from the water heater;
After the second step, a third step of supplying a cleaning liquid into the additional cooking pipe through the cleaning pipe and cleaning the additional cooking pipe;
After the third step, a fourth step of releasing the connection of the cleaning pipe to the additional cooking pipe after cleaning;
After the fourth step, a fifth step of connecting the additional cooking pipe again to the water heater;
It is supposed to be equipped with.

  According to the above solution, since the hot water supply pipe is cleaned with the hot water supply pipe disconnected from the additional cooking pipe, it is possible to completely prevent the hot water heater from being adversely affected by the cleaning. it can. Moreover, since the flow of the cleaning liquid in the piping for additional cooking is only one-way flow toward the bathtub, the filth discharged from the piping for additional cooking returns to the piping for additional cooking again. Therefore, it is preferable for effectively cleaning the piping for additional cooking. Furthermore, since the washing | cleaning liquid and filth discharged | emitted from the piping for additional cooking are discharged | emitted in a bathtub, the condition of washing | cleaning and a washing | cleaning effect can be confirmed visually.

A preferred mode based on the above solution is as described in claim 2 and the following. That is,
In the first step, each of the feeding side piping and the return side piping constituting the additional cooking pipe is disconnected at the connection site to the water heater,
In the fifth step, the feed-side pipe and the return-side pipe after washing are connected to the water heater,
(Corresponding to claim 2). In this case, it is preferable to efficiently perform the work by connecting and disconnecting the feed-side piping and the return-side piping to the hot water heater at the same time.

  In the third step, after one of the feeding side piping and the return side piping constituting the additional cooking piping is cleaned first, the other piping is cleaned. (Claim 3). In this case, the cleaning status and cleaning effect of the feed-side piping and the return-side piping can be confirmed individually for each piping, which is preferable for sufficiently cleaning each piping.

  In the third step, both the feed-side pipe and the return-side pipe constituting the additional cooking pipe are cleaned simultaneously (corresponding to claim 4). In this case, it is preferable for efficiently performing the cleaning operation.

  The cleaning in the third step is performed by cleaning with cleaning water containing ozone after cleaning with cleaning water containing detergent (corresponding to claim 5). In this case, it is preferable to sufficiently clean the additional cooking pipe. In particular, a high cleaning effect by detergent cleaning can be obtained, and sterilization and deodorization can be performed while sufficiently removing the detergent remaining in the additional cooking pipe by subsequent ozone cleaning.

  The cleaning in the third step includes a first cleaning in which cleaning is performed only with cleaning water, a second cleaning in which cleaning is performed with cleaning water containing ozone after the first cleaning, and a cleaning including a detergent after the second cleaning. The third cleaning is performed by water, and the fourth cleaning is performed by cleaning with cleaning water containing ozone after the third cleaning (corresponding to claim 6). In this case, it is possible to perform washing more sufficiently while obtaining the effect corresponding to the fifth aspect.

The cleaning in the third step is performed in a state where water is stored in the bathtub in advance, and the cleaning liquid and the filth discharged from the additional cooking pipe into the bathtub by cleaning are stored in the bathtub. To temporarily store
After the completion of cleaning of the additional cooking pipe, the outlet of the bathtub is opened, and the liquid containing the filth stored in the bathtub is discharged out of the bathtub.
(Corresponding to claim 7). In this case, it is preferable to easily discharge the cleaning liquid and filth. In particular, since the cleaning liquid and the filth are diluted with the water previously stored in the bathtub, the discharge from the outlet of the bathtub can be performed smoothly.

  The cleaning in the third step is performed by pumping the cleaning liquid into the additional cooking pipe with a pressure of 0.3 MPa or less (corresponding to claim 8). In this case, it is possible to satisfy both the improvement of the cleaning effect due to the pumping of the cleaning liquid and the prevention of damage to the additional cooking pipe and the leakage of the seal due to the pumping pressure.

The cleaning in the third step is performed in a plurality of steps,
After the cleaning in the third step is performed in the plurality of steps for any one of the return side piping and the sending side piping, the other piping is cleaned in the plurality of steps.
(Corresponding to claim 9). In this case, after each pipe is cleaned in a plurality of steps, the other pipe is cleaned in a plurality of steps, which is preferable for sufficiently obtaining the effect corresponding to the third aspect.

  According to the present invention, it is possible to clean the additional cooking pipe without adversely affecting the water heater.

The systematic diagram which shows the state which connected the bathtub and the water heater with the piping for additional cooking. The system diagram which shows the connection relationship between the piping for additional cooking, and the washing | cleaning apparatus. Process drawing which shows the washing | cleaning method by this invention.

  In FIG. 1, 1 is a bathtub and 2 is a water heater having a cooking function. The bathtub 1 and the water heater 2 are connected via additional cooking pipes 11 and 12. The pipe 11 is a feed side pipe, and the pipe 12 is a return side pipe. That is, when hot water is present in the bathtub 1 at a predetermined water level or higher, the hot water in the bathtub 1 is sucked into the hot water heater 2 from the feed-side pipe 11 by performing an operation for reheating the hot water heater 2. The sucked hot water is heated by the heater in the hot water heater 2 and then returns from the return side pipe 12 to the bathtub 1.

  In FIG. 1, the outlet of the bathtub 1 is indicated by reference numeral 1a, and the plug that covers the outlet 1a is indicated by reference numeral 1b. The hot water from the discharge port 1a is discharged to the outside through the discharge pipe 3. Moreover, although the hot water stored in the bathtub 1 is shown with the code | symbol 4 in FIG. 1, in order to wash | clean the piping 11 and 12 mentioned later in FIG. The water level is about the same as or slightly lower than that of the 12 opening portions in the bathtub 1).

  The water heater 2 and the additional cooking pipes 11 and 12 are detachably connected via connection portions 21 and 22. That is, in the connection part 21, it is comprised by the connection part 21A which consists of the external thread part set in the water heater 2, for example, and the connection part 21B which consists of the internal thread part provided in the edge part of the feed side piping 11, for example. The connecting portions 21A and 21B are detachably connected.

  Similarly, in the connection part 22, it is comprised by the connection part 22A which consists of the external thread part set to the water heater 2, for example, and the connection part 22B which consists of the internal thread part provided in the edge part of the return side piping 12, The connecting portions 22A and 22B are detachably connected. When the pipes 11 and 12 are washed, the connection at the connection parts 21 and 22 is released.

  1 and 2, K indicates a cleaning device. As shown in FIG. 2, a branch pipe 31 or 32 branched into two of the cleaning pipes 30 in the cleaning apparatus K is attached to and detached from the connection portions 21B and 22B of the disconnected pipes 11 and 12. Connect freely. That is, a connecting portion 31A that is detachably connected to the connecting portion 21B in the feed side piping 11 is configured at the distal end portion of the branch pipe 31 (corresponding to the connecting portion 21A of the water heater 2). Similarly, a connecting portion 32A that is detachably connected to the connecting portion 22B of the return side piping 12 is configured at the distal end portion of the branch pipe 32 (corresponding to the connecting portion 22A of the water heater 2).

  In FIG. 2, the cleaning pipe 30 has one common pipe 33 that merges upstream of the two branch pipes 31 and 32. A switching valve 34 is disposed at a branch portion between the branch pipes 31 and 32 and the common pipe 33. By switching the switching valve 34, the common pipe 33 is selectively connected to only one of the branch pipes 31 and 32.

  A pump 41 is connected to the common pipe 33. The pump 41 is for supplying (pressure feeding) the cleaning water in the cleaning tank 42 toward the intake valve 34 side. The cleaning tank 42 has an open / close valve 42 a for supplying and stopping supply of cleaning water therein to the pump 41.

  A tank 44 that stores ozone is connected to the common pipe 33 via a connection pipe 43, and an opening / closing type open / close valve 45 is connected to the connection pipe 43. The ozone concentration of the cleaning water in the common pipe 30 is measured and displayed by the densitometer 46.

  A tank 48 storing a detergent is connected to the common pipe 33 via a connection pipe 47 on the downstream side of the connection pipe 43. An opening / closing type open / close valve 49 is connected to the connection pipe 47. In addition, as a detergent, the same thing as what was conventionally used for piping washing | cleaning can be used. Further, the common pipe 33 is connected to a pressure gauge 50 for measuring and displaying the pressure of the cleaning liquid to be pumped.

  The various devices are disposed in the case 60. However, the valves 34, 42 a, 45, and 49 can be operated from the outside of the case 60, and the display surfaces of the concentration indicator 46 and the pressure gauge 50 are visible from the outside of the case 60. An operation unit (not shown) for controlling the operation of the pump 41 can also be operated from the outside of the case 60. As described above, the case 60 is configured compactly as the cleaning device K together with the internal devices and the cleaning pipe 30 extending to the outside, and can be easily transported (for example, with wheels).

  Next, the cleaning method according to the present invention will be described with reference to the process diagram of FIG. First, in step SB, water 4 is stored in the bathtub 1 at a low water level (see FIG. 1). Next, in step S <b> 1, the two pipes 11 and 12 and the water heater 2 are disconnected at the connection parts 21 and 22.

  In step S2, as shown in FIG. 2, the cleaning pipe 30 (branch pipes 31, 32) is connected to the two pipes 11, 12 disconnected from the water heater 2. That is, the connection part 31 </ b> A of the branch pipe 31 is connected to the connection part 21 </ b> B of the feed side pipe 11. Further, the connection portion 32 </ b> A of the branch pipe 32 is connected to the connection portion 22 </ b> B of the return side pipe 12.

  In step S3, as will be described later, the cleaning liquid is supplied into the additional cooking pipes 11 and 12, and the cleaning is performed. However, the cleaning liquid after cleaning and the filth removed by the cleaning are stored in the bathtub 1. It will be accumulated.

  Cleaning is performed as follows. First, the switching valve 34 is operated to connect either the feed side pipe 11 or the return side pipe 12 to the common pipe 33.

  In the following description, a case where the feed side pipe 11 is cleaned will be described. The pump 41 is operated with the on-off valve 42a opened, and only the cleaning water is first supplied (pressure-feed) into the sending side pipe 11, and the inner wall surface thereof is sufficiently wetted by the cleaning water (first). 1 wash). Thereafter, the on-off valve 45 is opened, and ozone cleaning in which ozone is dissolved in the cleaning water is performed (second cleaning). Thereafter, the on-off valve 45 is closed and the on-off valve 49 is opened to perform detergent cleaning in which detergent is dissolved in the cleaning water (third cleaning). When detergent cleaning is performed, the foamy cleaning liquid is discharged into the bathtub. Thereafter, the on-off valve 49 is closed, while the on-off valve 45 is opened to perform ozone cleaning again (fourth cleaning). As described above, in the embodiment, the feeding side pipe 11 is cleaned four times in total, such as cleaning with water only, first ozone cleaning, detergent cleaning, and second ozone cleaning.

  When the sending side pipe 11 is subjected to ozone cleaning, the opening degree of the on-off valve 49 is adjusted so that the ozone concentration of the cleaning liquid displayed on the densitometer 46 is within a predetermined range. Further, the operation of the pump 41 is controlled such that the pumping pressure of the cleaning liquid by the pump 41 is within a predetermined range (in the embodiment, 0.2 to 0.3 MPa). The higher the pumping pressure of the cleaning liquid, the higher the cleaning effect and the better. However, if the pressure is too high, damage to the feed pipe 11 and seal leakage may occur. Is preferred. In order to improve the cleaning effect, the pressure is preferably 0.2 MPa or more.

  After the cleaning of the feed side pipe 11 is completed, the switching valve 34 is operated to connect the return side pipe 12 to the common pipe 33. Thereafter, the same cleaning as in the above-described cleaning of the feed side pipe 11 is performed (execution of cleaning in four steps). Note that the return side pipe 12 may be cleaned first, and then the feed side pipe 11 may be cleaned.

  After the cleaning of the return side pipe 12 is completed, the connection between the feed side pipe 11 and the branch pipe 31 is released and the return side pipe 12 and the branch pipe 32 are connected as shown in step S4 of FIG. To release. Thereafter, as shown in step S5, the connecting portion 21B of the feed side pipe 11 is connected to the connecting portion 21A of the hot water heater 2, and similarly, the connecting portion 22B of the return side pipe 12 is connected to the connecting portion of the hot water heater 2. 22A is connected (returns to the state of FIG. 1).

  Finally, as shown in step S6, the stopper 1b of the bathtub 1 is pulled out, and the mixed liquid in which the water, the cleaning liquid, and the filth stored in the bathtub 1 are mixed is discharged to the outside of the bathtub 1 through the discharge port 1a. Discharge. The filth remaining on the bottom wall surface of the bathtub 1 may be flowed toward the outlet 1a using a shower or the like.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. When the cleaning of the feed side pipe 11 and the return side pipe 12 is performed in the same plurality of processes, the cleaning of one pipe and the other pipe may be performed sequentially for each cleaning process. Specifically, for example, when the cleaning process includes the above-described four processes of the first cleaning to the fourth cleaning, the first cleaning is sequentially performed on the pipes 11 and 12, and the second cleaning is performed on the pipes 11 and 12. Alternatively, the third cleaning may be sequentially performed on the pipes 11 and 12, and the fourth cleaning may be sequentially performed on the pipes 11 and 12. Further, each of the first cleaning to the fourth cleaning may be performed simultaneously on the two pipes 11 and 12 (the first cleaning is performed simultaneously on the pipes 11 and 12 and the second cleaning is performed on the pipes). 11 and 12), in this case, the switching valve 34 is unnecessary.

  Instead of providing the branch pipes 31 and 32, the common pipe 33 may be selectively connected to the pipes 11 and 12 for cleaning. In this case, when cleaning is performed in a plurality of steps, it is preferable to perform cleaning in a plurality of steps for one of the pipes 11 and 12, and then perform cleaning in a plurality of steps for the other piping.

  Water filling at a low water level in the bathtub 1 may be performed at least before supplying the cleaning liquid to the pipes 11 and 12, for example, after the pipes 11 and 12 are connected to the cleaning pipe 30. The time can be selected as appropriate. Further, the pipes 11 and 12 may be washed without filling the bathtub 1 with water. The discharge of the cleaning liquid mixed with the filth from the bathtub 1 can be performed at an appropriate time after the cleaning of the pipes 11 and 12 is completed, for example, before the pipes 11 and 12 are connected to the water heater 2. It can also be done. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is suitable as a method for cleaning a piping for additional cooking.

1: Bathtub 1a: Discharge port 1b: Plug body 2: Water heater 3: Discharge piping 4: Reservoir 11: Feeding piping (pipe for additional cooking)
12: Return side piping (pipe for additional cooking)
21: Connection part 21A: Connection part (water heater side)
21B: Connection part (feeding side piping side)
22: Connection part 22A: Connection part (water heater side)
22B: Connection part (return side piping side)
30: Pipe for cleaning 31: Branch pipe 31A: Connection part 32: Branch pipe 32A: Connection part 33: Common pipe 34: Switching valve 41: Pump 42: Tank (washing water)
42a: On-off valve 44: Tank (ozone)
45: Open / close valve 46: Densitometer (ozone concentration display)
48: Tank (detergent)
49: On-off valve 50: Pressure gauge 60: Case K: Cleaning device

  The present invention relates to a method for cleaning a piping for additional cooking.

  For the additional cooking of the bathtub, the hot water heater having the additional cooking function and the bathtub are connected by the additional cooking pipe. This additional cooking pipe is composed of two pipes: a feed-side pipe for flowing hot water in the bathtub to the water heater, and a return-side pipe for flowing hot water from the water heater toward the bathtub. Composed.

  In some cases, the additional cooking pipe is made considerably long as about 10 m, and its inner diameter is about 10 mm, which is a very small diameter. For this reason, with long-term use, filth adheres to the inner wall of the piping for additional cooking, and hinders the flow of hot water. In addition, when the additional cooking is performed, some of the filth attached to the inner wall of the additional cooking pipe is peeled off, and the peeled filth flows into the bathtub, causing discomfort to the bather. Sometimes it ends up. And the adhesion of filth to the inner wall of the piping for additional cooking tends to be promoted more because various bathing agents are often mixed in the bathtub.

  For this reason, it is desirable to wash the piping for additional cooking, that is, to remove the dirt attached to the inner wall of the piping for additional cooking. For this reason, in patent document 1, the clean hot water stored in the bathtub is pumped by the pump toward the water heater via the return side pipe, and the hot water passing through the water heater (internal pipe) is sent to the feed side. It has been proposed to perform cleaning using the circulation circuit as it is between the bathtub and the water heater, such as returning from the pipe to the bathtub.

JP 2003-106643 A

  As described in Patent Document 1, cleaning is performed using a circulation circuit between a bathtub and a water heater configured via a re-cooking pipe composed of two pipes as it is. This is preferable in terms of easy supply.

  However, it is not preferable to clean the recirculation circuit that is configured between the bathtub and the water heater while the hot water supply circuit is configured, which is a major cause of damaging the water heater. In other words, the water heater is usually equipped with a pump impeller and a flow meter for circulating hot water for additional cooking. It becomes easy to end up. In particular, it is conceivable to operate the water heater in order to smoothly pass the wash water in the water heater. In addition to this, the control system parts (for example, the inverter) for controlling the pump may be damaged. As described above, when the parts inside the water heater are damaged by the cleaning, the water heater itself is effectively replaced.

  The present invention has been made in view of the circumstances as described above, and its purpose is to provide a cleaning method for additional cooking piping that can clean additional piping without adversely affecting the water heater. There is to do.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1,
A method for cleaning a piping for additional cooking that connects a water heater and a bathtub,
A first step of disconnecting the piping for additional cooking at a connection site to the water heater;
After the first step, the second step of connecting the cleaning pipe to the portion of the additional cooking pipe that has been disconnected from the water heater;
After the second step, a third step of supplying a cleaning liquid into the additional cooking pipe through the cleaning pipe and cleaning the additional cooking pipe;
After the third step, a fourth step of releasing the connection of the cleaning pipe to the additional cooking pipe after cleaning;
After the fourth step, a fifth step of connecting the additional cooking pipe again to the water heater;
Bei to give a,
The cleaning in the third step is performed by cleaning with cleaning water containing ozone after cleaning with cleaning water including detergent,
The cleaning in the third step is performed in a state where water is stored in the bathtub in advance, and the cleaning liquid and the filth discharged from the additional cooking pipe into the bathtub by cleaning are stored in the bathtub. To temporarily store
After the completion of cleaning of the additional cooking pipe, the outlet of the bathtub is opened, and the liquid containing the filth stored in the bathtub is discharged out of the bathtub.
It is like that.

According to the above solution, since the hot water supply pipe is cleaned with the hot water supply pipe disconnected from the additional cooking pipe, it is possible to completely prevent the hot water heater from being adversely affected by the cleaning. it can. Moreover, since the flow of the cleaning liquid in the piping for additional cooking is only one-way flow toward the bathtub, the filth discharged from the piping for additional cooking returns to the piping for additional cooking again. Therefore, it is preferable for effectively cleaning the piping for additional cooking. Furthermore, since the washing | cleaning liquid and filth discharged | emitted from the piping for additional cooking are discharged | emitted in a bathtub, the condition of washing | cleaning and a washing | cleaning effect can be confirmed visually. In addition to the above, it is preferable for sufficient cleaning of the additional cooking pipe, and in particular, a high cleaning effect by detergent cleaning can be obtained, and the detergent remaining in the additional cooking pipe can be obtained by subsequent ozone cleaning. It can be sterilized and deodorized while being sufficiently removed. Furthermore, it is preferable for easily discharging the cleaning liquid and filth, and in particular, since the cleaning liquid and filth are diluted by the water stored in the bathtub in advance, the discharge from the bathtub outlet can be smoothly performed. it can.

A preferred mode based on the above solution is as described in claim 2 and the following. That is,
In the first step, each of the feeding side piping and the return side piping constituting the additional cooking pipe is disconnected at the connection site to the water heater,
In the fifth step, the feed-side pipe and the return-side pipe after washing are connected to the water heater,
(Corresponding to claim 2). In this case, it is preferable to efficiently perform the work by connecting and disconnecting the feed-side piping and the return-side piping to the hot water heater at the same time.

  In the third step, after one of the feeding side piping and the return side piping constituting the additional cooking piping is cleaned first, the other piping is cleaned. (Claim 3). In this case, the cleaning status and cleaning effect of the feed-side piping and the return-side piping can be confirmed individually for each piping, which is preferable for sufficiently cleaning each piping.

  In the third step, both the feed-side pipe and the return-side pipe constituting the additional cooking pipe are cleaned simultaneously (corresponding to claim 4). In this case, it is preferable for efficiently performing the cleaning operation.

The cleaning in the third step includes a first cleaning in which cleaning is performed only with cleaning water, a second cleaning in which cleaning is performed with cleaning water containing ozone after the first cleaning, and a cleaning including a detergent after the second cleaning. The third cleaning is performed with water, and the fourth cleaning is performed with cleaning with ozone-containing cleaning water after the third cleaning (corresponding to claim 5 ). In this case, it is possible to perform washing more sufficiently while obtaining the effect corresponding to the fifth aspect.

The cleaning in the third step is performed by pumping the cleaning liquid into the additional cooking pipe with a pressure of 0.3 MPa or less (corresponding to claim 6 ). In this case, it is possible to satisfy both the improvement of the cleaning effect due to the pumping of the cleaning liquid and the prevention of damage to the additional cooking pipe and the leakage of the seal due to the pumping pressure.

The cleaning in the third step is performed in a plurality of steps,
After the cleaning in the third step is performed in the plurality of steps for any one of the return side piping and the sending side piping, the other piping is cleaned in the plurality of steps.
(Corresponding to claim 7 ). In this case, after each pipe is cleaned in a plurality of steps, the other pipe is cleaned in a plurality of steps, which is preferable for sufficiently obtaining the effect corresponding to the third aspect.

  According to the present invention, it is possible to clean the additional cooking pipe without adversely affecting the water heater.

The systematic diagram which shows the state which connected the bathtub and the water heater with the piping for additional cooking. The system diagram which shows the connection relationship between the piping for additional cooking, and the washing | cleaning apparatus. Process drawing which shows the washing | cleaning method by this invention.

  In FIG. 1, 1 is a bathtub and 2 is a water heater having a cooking function. The bathtub 1 and the water heater 2 are connected via additional cooking pipes 11 and 12. The pipe 11 is a feed side pipe, and the pipe 12 is a return side pipe. That is, when hot water is present in the bathtub 1 at a predetermined water level or higher, the hot water in the bathtub 1 is sucked into the hot water heater 2 from the feed-side pipe 11 by performing an operation for reheating the hot water heater 2. The sucked hot water is heated by the heater in the hot water heater 2 and then returns from the return side pipe 12 to the bathtub 1.

  In FIG. 1, the discharge port of the bathtub 1 is shown by the code | symbol 1a, and the plug body which covers this discharge port 1a is shown by the code | symbol 1b. The hot water from the discharge port 1a is discharged to the outside through the discharge pipe 3. Moreover, although the hot water stored in the bathtub 1 is shown with the code | symbol 4 in FIG. 1, in order to wash | clean the piping 11 and 12 mentioned later in FIG. The water level is about the same as or slightly lower than that of the 12 opening portions in the bathtub 1).

  The water heater 2 and the additional cooking pipes 11 and 12 are detachably connected via connection portions 21 and 22. That is, in the connection part 21, it is comprised by the connection part 21A which consists of the external thread part set in the water heater 2, for example, and the connection part 21B which consists of the internal thread part provided in the edge part of the feed side piping 11, for example. The connecting portions 21A and 21B are detachably connected.

  Similarly, in the connection part 22, it is comprised by the connection part 22A which consists of the external thread part set to the water heater 2, for example, and the connection part 22B which consists of the internal thread part provided in the edge part of the return side piping 12, The connecting portions 22A and 22B are detachably connected. When the pipes 11 and 12 are washed, the connection at the connection parts 21 and 22 is released.

  1 and 2, K indicates a cleaning device. As shown in FIG. 2, a branch pipe 31 or 32 branched into two of the cleaning pipes 30 in the cleaning apparatus K is attached to and detached from the connection portions 21B and 22B of the disconnected pipes 11 and 12. Connect freely. That is, a connecting portion 31A that is detachably connected to the connecting portion 21B in the feed side piping 11 is configured at the distal end portion of the branch pipe 31 (corresponding to the connecting portion 21A of the water heater 2). Similarly, a connecting portion 32A that is detachably connected to the connecting portion 22B of the return side piping 12 is configured at the distal end portion of the branch pipe 32 (corresponding to the connecting portion 22A of the water heater 2).

  In FIG. 2, the cleaning pipe 30 has one common pipe 33 that merges upstream of the two branch pipes 31 and 32. A switching valve 34 is disposed at a branch portion between the branch pipes 31 and 32 and the common pipe 33. By switching the switching valve 34, the common pipe 33 is selectively connected to only one of the branch pipes 31 and 32.

  A pump 41 is connected to the common pipe 33. The pump 41 is for supplying (pressure feeding) the cleaning water in the cleaning tank 42 toward the intake valve 34 side. The cleaning tank 42 has an open / close valve 42 a for supplying and stopping supply of cleaning water therein to the pump 41.

  A tank 44 that stores ozone is connected to the common pipe 33 via a connection pipe 43, and an opening / closing type open / close valve 45 is connected to the connection pipe 43. The ozone concentration of the cleaning water in the common pipe 30 is measured and displayed by the densitometer 46.

  A tank 48 storing a detergent is connected to the common pipe 33 via a connection pipe 47 on the downstream side of the connection pipe 43. An opening / closing type open / close valve 49 is connected to the connection pipe 47. In addition, as a detergent, the same thing as what was conventionally used for piping washing | cleaning can be used. Further, the common pipe 33 is connected to a pressure gauge 50 for measuring and displaying the pressure of the cleaning liquid to be pumped.

  The various devices are disposed in the case 60. However, the valves 34, 42 a, 45, and 49 can be operated from the outside of the case 60, and the display surfaces of the concentration indicator 46 and the pressure gauge 50 are visible from the outside of the case 60. An operation unit (not shown) for controlling the operation of the pump 41 can also be operated from the outside of the case 60. As described above, the case 60 is configured compactly as the cleaning device K together with the internal devices and the cleaning pipe 30 extending to the outside, and can be easily transported (for example, with wheels).

  Next, the cleaning method according to the present invention will be described with reference to the process diagram of FIG. First, in step SB, water 4 is stored in the bathtub 1 at a low water level (see FIG. 1). Next, in step S <b> 1, the two pipes 11 and 12 and the water heater 2 are disconnected at the connection parts 21 and 22.

  In step S2, as shown in FIG. 2, the cleaning pipe 30 (branch pipes 31, 32) is connected to the two pipes 11, 12 disconnected from the water heater 2. That is, the connection part 31 </ b> A of the branch pipe 31 is connected to the connection part 21 </ b> B of the feed side pipe 11. Further, the connection portion 32 </ b> A of the branch pipe 32 is connected to the connection portion 22 </ b> B of the return side pipe 12.

  In step S3, as will be described later, the cleaning liquid is supplied into the additional cooking pipes 11 and 12, and the cleaning is performed. However, the cleaning liquid after cleaning and the filth removed by the cleaning are stored in the bathtub 1. It will be accumulated.

  Cleaning is performed as follows. First, the switching valve 34 is operated to connect either the feed side pipe 11 or the return side pipe 12 to the common pipe 33.

  In the following description, a case where the feed side pipe 11 is cleaned will be described. The pump 41 is operated with the on-off valve 42a opened, and only the cleaning water is first supplied (pressure-feed) into the sending side pipe 11, and the inner wall surface thereof is sufficiently wetted by the cleaning water (first). 1 wash). Thereafter, the on-off valve 45 is opened, and ozone cleaning in which ozone is dissolved in the cleaning water is performed (second cleaning). Thereafter, the on-off valve 45 is closed and the on-off valve 49 is opened to perform detergent cleaning in which detergent is dissolved in the cleaning water (third cleaning). When detergent cleaning is performed, the foamy cleaning liquid is discharged into the bathtub. Thereafter, the on-off valve 49 is closed, while the on-off valve 45 is opened to perform ozone cleaning again (fourth cleaning). As described above, in the embodiment, the feeding side pipe 11 is cleaned four times in total, such as cleaning with water only, first ozone cleaning, detergent cleaning, and second ozone cleaning.

  When the sending side pipe 11 is subjected to ozone cleaning, the opening degree of the on-off valve 49 is adjusted so that the ozone concentration of the cleaning liquid displayed on the densitometer 46 is within a predetermined range. Further, the operation of the pump 41 is controlled such that the pumping pressure of the cleaning liquid by the pump 41 is within a predetermined range (in the embodiment, 0.2 to 0.3 MPa). The higher the pumping pressure of the cleaning liquid, the higher the cleaning effect and the better. However, if the pressure is too high, damage to the feed pipe 11 and seal leakage may occur. Is preferred. In order to improve the cleaning effect, the pressure is preferably 0.2 MPa or more.

  After the cleaning of the feed side pipe 11 is completed, the switching valve 34 is operated to connect the return side pipe 12 to the common pipe 33. Thereafter, the same cleaning as in the above-described cleaning of the feed side pipe 11 is performed (execution of cleaning in four steps). Note that the return side pipe 12 may be cleaned first, and then the feed side pipe 11 may be cleaned.

  After the cleaning of the return side pipe 12 is completed, the connection between the feed side pipe 11 and the branch pipe 31 is released and the return side pipe 12 and the branch pipe 32 are connected as shown in step S4 of FIG. To release. Thereafter, as shown in step S5, the connecting portion 21B of the feed side pipe 11 is connected to the connecting portion 21A of the hot water heater 2, and similarly, the connecting portion 22B of the return side pipe 12 is connected to the connecting portion of the hot water heater 2. 22A is connected (returns to the state of FIG. 1).

  Finally, as shown in step S6, the stopper 1b of the bathtub 1 is pulled out, and the mixed liquid in which the water, the cleaning liquid, and the filth stored in the bathtub 1 are mixed is discharged to the outside of the bathtub 1 through the discharge port 1a. Discharge. The filth remaining on the bottom wall surface of the bathtub 1 may be flowed toward the outlet 1a using a shower or the like.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. When the cleaning of the feed side pipe 11 and the return side pipe 12 is performed in the same plurality of processes, the cleaning of one pipe and the other pipe may be performed sequentially for each cleaning process. Specifically, for example, when the cleaning process includes the above-described four processes of the first cleaning to the fourth cleaning, the first cleaning is sequentially performed on the pipes 11 and 12, and the second cleaning is performed on the pipes 11 and 12. Alternatively, the third cleaning may be sequentially performed on the pipes 11 and 12, and the fourth cleaning may be sequentially performed on the pipes 11 and 12. Further, each of the first cleaning to the fourth cleaning may be performed simultaneously on the two pipes 11 and 12 (the first cleaning is performed simultaneously on the pipes 11 and 12 and the second cleaning is performed on the pipes). 11 and 12), in this case, the switching valve 34 is unnecessary.

  Instead of providing the branch pipes 31 and 32, the common pipe 33 may be selectively connected to the pipes 11 and 12 for cleaning. In this case, when cleaning is performed in a plurality of steps, it is preferable to perform cleaning in a plurality of steps for one of the pipes 11 and 12, and then perform cleaning in a plurality of steps for the other piping.

Water filling at a low water level in the bathtub 1 may be performed at least before supplying the cleaning liquid to the pipes 11 and 12, for example, after the pipes 11 and 12 are connected to the cleaning pipe 30. , Ru can choose a time as appropriate. Discharge of the cleaning liquid waste from the bath tank 1 is mixed in, as long as it is after the completion of the cleaning of the pipes 11 and 12, can be done with appropriate timing, for example, before connecting the pipe 11 to the water heater 2 Can also be done. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is suitable as a method for cleaning a piping for additional cooking.

1: Bathtub 1a: Discharge port 1b: Plug body 2: Water heater 3: Discharge piping 4: Reservoir 11: Feeding piping (pipe for additional cooking)
12: Return side piping (pipe for additional cooking)
21: Connection part 21A: Connection part (water heater side)
21B: Connection part (feeding side piping side)
22: Connection part 22A: Connection part (water heater side)
22B: Connection part (return side piping side)
30: Pipe for cleaning 31: Branch pipe 31A: Connection part 32: Branch pipe 32A: Connection part 33: Common pipe 34: Switching valve 41: Pump 42: Tank (washing water)
42a: On-off valve 44: Tank (ozone)
45: Open / close valve 46: Densitometer (ozone concentration display)
48: Tank (detergent)
49: On-off valve 50: Pressure gauge 60: Case K: Cleaning device

Claims (9)

A method for cleaning a piping for additional cooking that connects a water heater and a bathtub,
A first step of disconnecting the piping for additional cooking at a connection site to the water heater;
After the first step, the second step of connecting the cleaning pipe to the portion of the additional cooking pipe that has been disconnected from the water heater;
After the second step, a third step of supplying a cleaning liquid into the additional cooking pipe through the cleaning pipe and cleaning the additional cooking pipe;
After the third step, a fourth step of releasing the connection of the cleaning pipe to the additional cooking pipe after cleaning;
After the fourth step, a fifth step of connecting the additional cooking pipe again to the water heater;
A cleaning method for piping for additional cooking characterized by comprising: In claim 1,
In the first step, each of the feeding side piping and the return side piping constituting the additional cooking pipe is disconnected at the connection site to the water heater,
In the fifth step, the feed-side pipe and the return-side pipe after washing are connected to the water heater,
A method for cleaning a piping for additional cooking characterized by the above. In claim 1 or claim 2,
In the third step, the cleaning of the other pipe is performed after the cleaning of either one of the feed side pipe and the return side pipe constituting the additional cooking pipe is performed first. How to clean the piping for additional cooking. In claim 1 or claim 2,
In the third step, cleaning is performed simultaneously on both the feed-side piping and the return-side piping that constitute the additional cooking pipe. In any one of Claims 1 thru | or 4,
The cleaning method for the cooking pipe, wherein the cleaning in the third step is performed by cleaning with cleaning water containing ozone after cleaning with cleaning water including detergent. In any one of Claims 1 thru | or 4,
The cleaning in the third step includes a first cleaning in which cleaning is performed only with cleaning water, a second cleaning in which cleaning is performed with cleaning water containing ozone after the first cleaning, and a cleaning including a detergent after the second cleaning. A method for cleaning a re-cooking pipe, characterized in that it is performed by a third cleaning for cleaning with water and a fourth cleaning for cleaning with cleaning water containing ozone after the third cleaning. In any one of Claims 1 thru | or 6,
The cleaning in the third step is performed in a state where water is stored in the bathtub in advance, and the cleaning liquid and the filth discharged from the additional cooking pipe into the bathtub by cleaning are stored in the bathtub. To temporarily store
After the completion of cleaning of the additional cooking pipe, the outlet of the bathtub is opened, and the liquid containing the filth stored in the bathtub is discharged out of the bathtub.
A method for cleaning a piping for additional cooking characterized by the above. In any one of Claims 1 thru | or 7,
The cleaning in the third cooking step is characterized in that the cleaning in the third step is performed by pumping a cleaning liquid into the cooking piping with a pressure of 0.3 MPa or less. In Claim 3, The washing | cleaning in said 3rd step is made to be performed in multiple processes,
After the cleaning in the third step is performed in the plurality of steps for any one of the return side piping and the sending side piping, the other piping is cleaned in the plurality of steps.
A method for cleaning a piping for additional cooking characterized by the above.

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