JP2006084130A - Cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning device capable of recovering a cleaning body after finishing cleaning body circulating operation, while simplifying a cleaning body recovering constitution, by performing the cleaning body circulating operation, while restraining abrasion of the cleaning body. <P>SOLUTION: This cleaning device is provided with a recovering flow passage 5 connected to an intermediate part of a circulating passage 4 by branching off from a downstream side connecting part 4d of the circulating passage 4 and a downstream side branch passage 3, and a sending-out flow passage 6 connected to the intermediate part of the circulating passage 4 by branching off from an upstream side connecting part 4u of the circulating passage 4 and an upstream side branch passage 2. A cleaning body storage part 40 having a storage part filtering member 43 for filtering the cleaning body SB from fluid, is arranged in the respective intermediate parts of the recovering flow passage 5 and the sending-out flow passage 6. An operation control means 50 is constituted so as to perform the cleaning body circulating operation, by putting a flowing state switching means V in a circulating flowing state of making the fluid flow to the upstream side branch passage 2 by passing over the total length through the circulating passage 4 from the downstream side branch passage 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention passes along with the fluid to a downstream branch passage that branches downstream from the cleaning target portion in the fluid flow path downstream of the cleaning target portion provided in the fluid flow path through which the fluid flows. Equipped with a cleaning body separating section for separating the cleaning body to be flown,
A circulation path that connects the downstream branch path and an upstream branch path that branches from the upstream side of the cleaning target portion in the fluid flow path, and the upstream branch path or the downstream branch path, A pump capable of conveying the fluid in a direction from the downstream branch path toward the upstream branch path;
An operation control means capable of executing a cleaning body circulation operation for circulating the cleaning body together with the fluid between the cleaning target portion and the circulation path and cleaning the cleaning target portion in a state where the pump is operated. The present invention relates to a cleaning device provided.

  A heat exchanger that exchanges heat between a fluid such as cooling water that flows inside the heat transfer tube and a heat medium such as an absorbing solution that flows outside the heat transfer tube, such as an absorber or condenser of an absorption chiller / heater In some cases, scales may occur due to precipitation and adhesion of salts in the fluid on the inner wall of the heat transfer tube. For example, the scale may cause problems such as a decrease in efficiency of the heat exchanger. is there.

  Such a cleaning device is generated in a portion to be cleaned by allowing a cleaning body such as a sponge-like cleaning ball to flow along with the fluid through a portion to be cleaned such as a heat exchanger provided in a fluid flow path through which the fluid flows. It is configured so that the scale that has been removed can be removed.

  And such a washing | cleaning apparatus is a washing body circulation which circulates a washing body with a fluid between a washing | cleaning target part and a circulation path in the state which operates a pump by an operation control means regularly or when needed. When the cleaning body circulation operation is completed, the cleaning body is collected in the cleaning body container, and the cleaning body does not pass through the cleaning target portion when the cleaning body circulation operation is not performed. It is configured. Therefore, when the cleaning is stopped, it is possible to suppress damage due to wear or the like of the cleaning body, and it is possible to suppress a decrease in fluid flow efficiency due to the passage of the cleaning body in the cleaning target portion.

  In such a cleaning apparatus, conventionally, the cleaning body container including a porous or net-like container filtering member that separates the cleaning body from the fluid as the fluid flows is used to clean the cleaning body container. In the body circulation operation, the cleaning body is disposed in an intermediate portion of the circulation path through which the cleaning body circulates, and in the cleaning body circulation operation, the cleaning body is passed through a cleaning body housing portion provided in the intermediate portion of the circulation path. It was comprised so that it might circulate between a washing | cleaning object part and a circulation path with a fluid (for example, refer patent document 1 and patent document 2).

Specifically, the cleaning body storage unit described in Patent Literature 1 is configured to circulate the cleaning body in the circulation path by opening and closing a switching valve provided in an open part formed in the storage unit filtration member. It has been configured to switch between a state in which the cleaning body of the road is separated and collected by the accommodating portion separation member.
On the other hand, the cleaning body storage unit described in Patent Document 2 forms an upper space through which the circulation path passes and a lower space partitioned from the upper space via a storage unit separation member in the cleaning body storage unit. The state is such that the cleaning body is circulated through the circulation path through the upper space, and the state in which the cleaning body is filtered and collected by the container separation member by passing the fluid from the upper space to the lower space. Was composed.

JP 58-14000 A JP-A-4-13095

  However, in the conventional cleaning device, when the cleaning body circulation operation is performed in which the cleaning body is circulated between the cleaning target portion and the circulation path together with the fluid, the cleaning body passes through the cleaning body housing portion provided in the circulation path. Since it is comprised so that a washing | cleaning body will collide with the inner wall of a washing | cleaning body accommodating part, or the accommodating part filter separation member, it will become easy to wear.

Further, it is necessary to configure the cleaning body container so that the cleaning body can be switched between a state in which the cleaning body is allowed to pass and a state in which the cleaning body is separated and recovered, and the cleaning body recovery configuration for recovering the cleaning body becomes complicated. .
In particular, the cleaning body storage unit described in Patent Document 2 allows the cleaning body to pass through the upper space of the cleaning body storage unit satisfactorily without the cleaning body being collected by the storage unit filtration member when the cleaning body circulation operation is performed. Therefore, the cleaning body container may be configured so that turbulent flow is generated in the upper space, and it is necessary to employ a more complicated cleaning body recovery configuration.

  The present invention has been made in view of such circumstances, and the purpose thereof is to perform cleaning body circulation operation while suppressing the wear of the cleaning body, and to perform cleaning while simplifying the cleaning body recovery configuration. An object of the present invention is to provide a cleaning device capable of recovering a cleaning body after completion of a body circulation operation.

The cleaning apparatus according to the present invention includes a downstream branch path that branches from a downstream side of the cleaning target portion in the fluid flow path to a downstream side of a cleaning target section provided in a fluid flow path through which a fluid flows. A cleaning body separation unit for separating the cleaning body flowing along with the fluid is provided.
A circulation path that connects the downstream branch path and an upstream branch path that branches from the upstream side of the cleaning target portion in the fluid flow path, and the upstream branch path or the downstream branch path, A pump capable of conveying the fluid in a direction from the downstream branch path toward the upstream branch path;
An operation control means capable of executing a cleaning body circulation operation for circulating the cleaning body together with the fluid between the cleaning target portion and the circulation path and cleaning the cleaning target portion in a state where the pump is operated. With
The first characteristic configuration is a recovery flow path branched from a downstream connection portion between the circulation path and the downstream branch path and connected to an intermediate portion of the circulation path, and the circulation path and the upstream branch A delivery flow path branched from the upstream connection with the path and connected to the intermediate part of the circulation path is provided,
A housing part filtering member that filters the cleaning body from the fluid as the fluid flows through the recovery flow path from the downstream connection part toward the circulation path; and the circulation path A cleaning body containing section for sending the cleaning body to the upstream branch passage as the fluid flows through the delivery flow path from the upstream connection section to the upstream connection section. Arranged in the middle part of each of the flow paths,
A circulation flow state in which the fluid is passed from the downstream branch passage to the upstream branch passage through the entire length of the circulation passage, and the fluid is collected from the downstream branch passage to the circulation passage. A flow-through state for sending through the flow-path portion bypassed by the flow path and the flow-out channel for sending to the upstream-side branch, and the recovery fluid from the downstream-side branch A flow state that is alternatively switchable to a recovery flow state that flows through the upstream branch path via a flow path and a flow path portion that is bypassed by the delivery flow path in the circulation path Switching means is provided,
The operation control means is configured to execute the cleaning body circulation operation by setting the flow state switching means to the circulation state, and operates the pump before the cleaning body circulation operation. In this state, a cleaning body delivery operation is performed to bring the flow state switching means into the delivery flow state, and after the cleaning body circulation operation, the flow state switching means is used for the recovery in a state where the pump is operated. The present invention is characterized in that it is configured to execute a cleaning body recovery operation for setting the flow state.

That is, the recovery flow path branched from the downstream connection section between the circulation path and the downstream branch path and connected to the intermediate portion of the circulation path, and the upstream connection section between the circulation path and the upstream branch path A recovery passage that is connected to an intermediate portion of the circulation path, and is used for recovery of the cleaning body storage section provided with a storage section filtration member that filters the cleaning body from the fluid as the fluid flows. It arrange | positions in the intermediate part of each of a flow path and a delivery flow path.
In addition, a circulation flow state in which the fluid flows from the downstream branch passage to the upstream branch passage through the entire length of the circulation passage, and the fluid is bypassed by the recovery passage in the circulation passage from the downstream branch passage. A flow-through state for sending through the flow-path portion and the flow-out flow path to the upstream branch, and the fluid from the downstream branch to the recovery flow and the flow-out flow in the circulation There is provided a flow state switching means that is selectively switchable to a recovery flow state that flows through the upstream branch path through a bypassed flow path portion.

Then, the operation control means sets the flow state switching means to the discharge flow state when the pump is operated, and sets the flow state switching means to the circulation flow state when the pump is operated. The cleaning body circulation operation and the cleaning body recovery operation in which the flow state switching means is set to the recovery flow state while the pump is operated are sequentially executed.
That is, in the cleaning body circulation operation, the cleaning body is passed through a path (hereinafter also referred to as a cleaning body circulation path) that flows from the downstream branch path to the upstream branch path through the entire length of the circulation path. Since the fluid is circulated between the cleaning target portion and the circulation path together with the fluid, the cleaning body circulation operation can be performed in a form in which the cleaning body is circulated without passing through the cleaning body accommodating portion.

  In the cleaning body recovery operation that is performed after the cleaning body circulation operation, the fluid that has passed through the cleaning body separation section and has flowed through the downstream branch passage is directed from the downstream connection section toward the circulation path through the recovery flow path. Therefore, when the fluid passes through the cleaning body container provided in the recovery channel, the cleaning body that is separated by the cleaning body separation unit and flows along with the fluid is filtered by the storage unit separation member. Separately, it is collected on the container side in the cleaning body container.

  In the cleaning body delivery operation performed before the cleaning body circulation operation, the fluid that has flowed through the downstream branch passage is caused to flow through the delivery flow path from the circulation passage toward the upstream connection portion, that is, the fluid is Since the cleaning body housing portion is allowed to flow from the side opposite to the housing portion side toward the housing portion side, the cleaning body housed on the housing portion side in the cleaning body housing portion in the cleaning body recovery operation is Together with the fluid, it flows out from the cleaning body container to the delivery channel and flows from the delivery channel to the upstream branch.

  In other words, the cleaning body container is not provided in the circulation path, and the cleaning body is circulated without passing the cleaning body container. By performing the cleaning body recovery operation and the cleaning body delivery operation, the cleaning body that has been circulated without passing through the cleaning body container in the cleaning body circulation operation is recovered to the cleaning body container, and as such the cleaning body Prior to the cleaning body circulation operation, the cleaning body recovered in the storage section can be allowed to flow out of the cleaning body storage section and flow through the upstream branch passage.

  Accordingly, since the cleaning body circulation operation can be performed without allowing the cleaning body to pass through the cleaning body housing portion, it is possible to suppress the wear of the cleaning body, and to provide a special means for the cleaning body housing portion. The cleaning body circulated in the cleaning body circulation operation is collected in the cleaning body container, and the collected cleaning body is sent from the cleaning body container to the upstream branch for the cleaning body circulation operation. Therefore, the cleaning body recovery configuration can be simplified.

Incidentally, the following configuration is conceivable as another configuration for performing the cleaning body circulation operation in a form in which the cleaning body is circulated without passing through the cleaning body housing portion.
That is, an upstream recovery delivery path that branches from a connection portion between the circulation path and the upstream branch path, and a downstream recovery delivery path that branches from a connection portion between the circulation path and the downstream branch path, Between the upstream collection and delivery path and the downstream collection and delivery path, the upstream collection and delivery path and the downstream collection and delivery path are arranged so as to partition the cleaning body from the fluid. A cleaning body storage section including a storage section filtering member, and a connection state between the downstream branch path and the upstream branch path, a circulation state connected through the circulation path, and the cleaning body storage section Switching means that can be switched to a recovery / delivery state connected via the control unit, and before the operation control means performs the cleaning body circulation operation, the switching means is in the state of not operating the pump. Execute the cleaning body delivery operation to be in a state, and When executing the cleansing circulation operation, the switching means is set to the circulation state in a state where the pump is operated, and after the cleaning body circulation operation is executed, the switching means is recovered and sent out in a state where the pump is operated. It is comprised so that the washing body collection | recovery driving | running which will be in a state may be performed.

In other words, after the cleaning body circulation operation is performed, the cleaning body recovery operation is performed, so that the fluid flows into the cleaning body storage portion via the downstream branching path and the downstream recovery delivery path, and the storage portion separation member The cleaning body flowing along with the fluid can be recovered to the storage section side of the cleaning body storage section by passing from the storage section side toward the opposite side and flowing through the upstream collection and delivery path. .
In the cleaning body delivery operation, since the pump is not operated, the fluid pressure in the upstream branch passage becomes higher than the fluid pressure in the downstream branch passage, and the fluid is washed through the upstream branch passage and the upstream recovery delivery passage. Flowing into the body accommodating portion, passing from the side opposite to the accommodating portion side where the cleaning body of the accommodating portion filtering member is accommodated toward the accommodating portion side, and passing through the downstream collection delivery path to the downstream side By flowing to the side branch path side, the cleaning body accommodated in the cleaning body accommodating portion can be sent to the downstream branch path via the downstream recovery delivery path by the flow of the fluid.

However, in this case, in the cleaning body delivery operation, the fluid flows through the upstream branch path and the downstream branch path in a direction opposite to the direction in which the pump is forced to flow through the cleaning body circulation operation. So the pump will reverse.
When the pump is started to perform the cleaning body circulation operation in such a state that the fluid flows in the opposite direction to that in the cleaning body circulation operation and the pump is reversed in the cleaning body delivery operation, Therefore, it is necessary to configure the electric circuit with a high power resistance, which is disadvantageous in terms of reducing the cost of the electric circuit configuration.
On the other hand, according to the present invention, in any of the cleaning body delivery operation, the cleaning body circulation operation and the cleaning body recovery operation, the pump is operated to supply the fluid to the upstream branching path and the downstream branching path. In the same direction, it is possible to prevent the pump from being reversed, which is advantageous in terms of reducing the cost of the electric circuit configuration.

  In short, a cleaning device that can perform cleaning body circulation operation while suppressing wear of the cleaning body, and that can perform cleaning body recovery after completion of the cleaning body circulation operation while simplifying the cleaning body recovery configuration. Can now be offered.

In addition to the first feature configuration, the second feature configuration is
The flow state switching means includes a downstream three-way switching valve connected to the circulation path, the downstream branch path, and the recovery channel, the circulation path, the upstream branch path, and the delivery channel. And an upstream three-way switching valve connected to each other.

That is, the downstream side three-way switching valve connects the downstream side branching path and the circulation path and closes the recovery channel, and the upstream side three-way switching valve connects the circulation path and the upstream side branching path and sends it out. By setting the flow path to the closed state, the circulation flow state can be obtained.
The downstream three-way switching valve connects the downstream branching path and the circulation path and closes the recovery channel, and the upstream three-way switching valve connects the delivery channel and the upstream branching path. In addition, by setting the circulation path to the closed state, the sending switching state can be obtained.
The downstream three-way switching valve communicates the downstream branching channel and the recovery channel and closes the circulation channel, and the upstream three-way switching valve communicates the circulation channel and the upstream branching channel. The collection flow state can be achieved by closing the flow path.

Incidentally, the flow state switching means includes a flow path portion on the downstream connecting portion side of the cleaning body housing portion in the recovery flow path, a flow path portion bypassed by the recovery flow path in the circulation path, Four motor-operated valves provided separately for each of the flow path part on the upstream connection part side of the cleaning body container in the flow path and the flow path part bypassed by the flow path for delivery in the circulation path By configuring the four motor-operated valves to open and close, the circuit can be selectively switched between the circulation flow state, the delivery flow state, and the recovery flow state. Is possible.
However, in this case, it is necessary to provide four motor-operated valves, and the number of parts increases, which complicates the configuration.
On the other hand, by configuring the flow state switching means with the downstream three-way switching valve and the upstream three-way switching valve, the number of parts can be reduced and the configuration can be simplified. it can.
Therefore, it is possible to reduce the cost of the cleaning device by simplifying the configuration.

In addition to the first or second feature configuration, the third feature configuration is
There is provided a backflow prevention means for preventing the fluid from flowing back through the upstream branch path from the fluid flow path side to the circulation path side when the pump is stopped.

That is, when the pump is stopped, the backflow prevention means prevents the fluid from flowing back from the upstream branch path from the fluid flow path side to the circulation path side.
In other words, even if the pump is stopped, the backflow prevention means allows the fluid to flow through the circulation path and the cleaning body housing portion from the upstream branch path and through the downstream branch path toward the fluid flow path side. This prevents the pump from reversing.
Therefore, when the cleaning is stopped without cleaning the portion to be cleaned, the pump can be stopped while avoiding the reverse rotation of the pump, thereby reducing the power consumption and further suppressing the wear of the cleaning body.

By the way, even after the cleaning body recovery operation for a predetermined time after the cleaning body circulation operation is completed, until the next cleaning body circulation operation is executed, the cleaning body recovery operation is continuously executed. Even if the backflow prevention means is not provided, it is possible to avoid the reverse rotation of the pump. However, since the pump is operated, it is disadvantageous in terms of power consumption reduction, and the cleaning body in which the cleaning body is accommodated Since the fluid flows through the housing portion, it is disadvantageous in terms of suppressing cleaning body wear.
In short, it has become possible to reduce power consumption and further suppress wear of the cleaning body.

In addition to any of the first to third feature configurations described above, the fourth feature configuration is
A flow path portion that connects the cleaning body accommodation section and the intermediate portion of the circulation path in the recovery flow path, and a connection between the cleaning body storage section and the intermediate section of the circulation path in the delivery flow path. The channel part is configured to be shared,
The common flow path portion is provided with a reverse inflow prevention filtering member for filtering the cleaning body from the fluid.

That is, in the cleaning body delivery operation, the fluid flows from the downstream branch passage to the upstream branch passage through the passage portion bypassed by the recovery passage in the circulation passage and the delivery passage. When the operating time of the cleaning body delivery operation becomes longer, the cleaning body that has flowed out of the cleaning body housing portion into the recovery flow path, together with the fluid, flows upstream, It flows in the order of the flow path portion that is bypassed by the recovery flow path in the side branch path and the circulation path, and reaches the shared flow path section in the delivery flow path, but reversely flows into the shared flow path section. Since the blocking filter separating member is provided, the reverse flow blocking filtering member prevents the cleaning body storage portion from flowing into the side opposite to the storage portion side.
In the cleaning body circulation operation, all or substantially all of the cleaning bodies accommodated in the cleaning device can be circulated between the cleaning target portion and the circulation path together with the fluid.

  In addition, when the cleaning body flows into the side opposite to the housing portion side in the cleaning body housing portion, the cleaning body that has flowed into the opposite side remains in the inflow portion during the cleaning body circulation operation. In the circulation operation, the number of cleaning bodies that circulate decreases, and the cleaning efficiency decreases.

  Therefore, in the cleaning body circulation operation, all or almost all of the cleaning bodies accommodated in the cleaning device can be circulated between the cleaning target part and the circulation path together with the fluid, so that the cleaning efficiency is reduced. Can be suppressed.

In addition to any of the first to fourth feature configurations described above, the fifth feature configuration is
The cleaning target portion is a heat exchanger that performs heat exchange between the fluid flowing into the heat transfer tube and the heat medium flowing outside the heat transfer tube.

That is, heat that exchanges heat between a fluid such as cooling water that flows into the heat transfer tube and a heat medium such as an absorption solution that flows outside the heat transfer tube, such as an absorber or condenser of an absorption chiller / heater. A mode in which the cleaning body is circulated without passing through the cleaning body container by performing the cleaning body feeding operation, the cleaning body circulation operation, and the cleaning body recovery operation as described above, with the exchanger as the cleaning target portion. Then, the cleaning body is circulated to prevent the cleaning body from passing through the cleaning body housing and being worn, and the cleaning body is allowed to flow along with the fluid in the heat transfer tube of the heat exchanger. The scale which deposits and adheres to the inner wall of can be removed.
Then, in order to perform the cleaning body circulation operation in a form in which the cleaning body is circulated without passing through the cleaning body storage section, the cleaning body storage section is not provided in the circulation path, but the cleaning body storage section is specially provided. The cleaning body that has been circulated in the cleaning body circulation operation is collected in the cleaning body container without providing any means, and the recovered cleaning body is upstream from the cleaning body container for the cleaning body circulation operation. Since it can send out to a side branch path, simplification of a washing body recovery composition can be aimed at.

  Therefore, in a cleaning device having a heat exchanger such as an absorber or condenser of an absorption chiller / heater as a cleaning target part, it becomes possible to perform cleaning body circulation operation while suppressing wear of the cleaning body, Further, the cleaning body can be recovered after the cleaning body circulation operation is completed while simplifying the cleaning body recovery configuration.

In addition to any of the first to fifth feature configurations described above, the sixth feature configuration is
The cleaning body is a sponge-like cleaning ball.

That is, by using a sponge-like cleaning ball made of rubber or resin or the like as the cleaning body, the cleaning ball can be passed through the cleaning target portion and the cleaning target portion can be cleaned well.
Further, since the cleaning ball is easy to process and the like, the size of the cleaning ball is set to be equal to or slightly larger than the diameter of the flow path of the cleaning target portion, so that the cleaning ball is placed on the inner wall of the cleaning target portion. The outer surface can be satisfactorily brought into contact with each other, and the portion to be cleaned can be efficiently cleaned.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
As shown in FIG. 1, the cleaning device 100 is a cleaning target unit provided in a fluid flow path 1 through which a fluid F such as cooling water flows, such as an absorber or condenser of an absorption chiller / heater. A sponge-like cleaning ball SB made of rubber, resin, or the like as a cleaning body is allowed to flow along with the fluid F in the heat transfer tube 22 of the heat exchanger 20, so that the inside of the heat transfer tube 22 of the heat exchanger 20. Is configured to remove the scale generated.

  The cleaning device 100 flows along with the fluid F to the downstream branch path 3 branched from the downstream side 1B to the downstream side 1B of the fluid flow path 1 through which the fluid F flows. A circulation path that includes a cleaning body separation unit 30 that separates the cleaning balls SB and connects the downstream branch path 3 and the upstream branch path 2 that branches from the upstream side 1A of the fluid flow path 1 relative to the heat exchanger 20 4 and a pump 9 capable of conveying the fluid F in the direction from the downstream branch 3 to the upstream branch 2 in the downstream branch 3.

  The cleaning device 100 is provided with an operation control device 50 as an operation control means for controlling the operation. The operation control device 50 operates the pump 9 so that the cleaning ball SB together with the fluid F is heated with the heat. A cleaning body circulation operation is performed in which the heat exchanger 20 is washed by circulating between the exchanger 20 and the circulation path 4.

Hereinafter, the cleaning apparatus 100 will be described in detail.
The cleaning device 100 includes a recovery flow path 5 that branches from a downstream connection portion 4d between the circulation path 4 and the downstream branch path 3 and connects to an intermediate portion of the circulation path 4, and the circulation path 4 and the upstream side. A delivery flow path 6 branched from the upstream side connection portion 4 u with the branch path 2 and connected to the intermediate portion of the circulation path 4 is provided.

  Further, in the cleaning device 100, a storage unit separation member that separates the cleaning balls SB from the fluid F as the fluid F flows through the recovery channel 5 from the downstream connection portion 4d toward the circulation path 4. 43, and a cleaning body container 40 that sends the cleaning ball SB to the upstream branch passage 2 as the fluid F flows through the delivery flow path 6 from the circulation path 4 toward the upstream connection section 4u. Are disposed in the middle part of each of the recovery channel 5 and the delivery channel 6.

  Further, in the cleaning device 100, a circulation flow state in which the fluid F passes through the entire length of the circulation path 4 from the downstream branch path 3 to the upstream branch path 2, and the fluid F flows in the downstream branch path 3. To the upstream branch path 2 through the flow path portion bypassed by the recovery flow path 5 in the circulation path 4 and the output flow path 6, and the fluid F downstream It is selected as a collection flow state for passing through the upstream branch passage 2 from the side branch passage 3 via the collection passage passage 5 and the passage portion bypassed by the delivery passage passage 6 in the circulation passage 4. The flow state switching means V which can be switched freely is provided.

  In this embodiment, the flow state switching means V includes a downstream side three-way switching valve 7 provided at the downstream side connection portion 4d connected to the circulation path 4, the downstream branch path 3, and the recovery path 5. An upstream side connection portion 4u is provided with an upstream side three-way switching valve 8 connected to the circulation path 4, the upstream side branch path 2, and the delivery flow path 6.

The downstream three-way switching valve 7 includes a port 7a connected to the downstream branching passage 3, a port 7b connected to the circulation passage 4, and a port 7c connected to the recovery passage 5.
As shown in FIGS. 2, 3 and 4, the downstream side three-way switching valve 7 brings the port 7a connected to the downstream side branch path 3 into communication with the port 7b connected to the circulation path 4, and is recovered. As shown in FIGS. 1 and 5, the port 7a connected to the downstream branch passage 3 and the recovery channel 5 are connected, as shown in FIGS. The port 7c is in a communication state and can be switched to a recovery switching state in which the port 7b connected to the circulation path 4 is closed.

The upstream three-way switching valve 8 includes a port 8a connected to the upstream branching passage 2, a port 8b connected to the circulation passage 4, and a port 8c connected to the delivery passage 6.
Then, as shown in FIGS. 1, 4 and 5, the upstream side three-way switching valve 8 brings the port 8a connected to the upstream side branch path 2 and the port 8b connected to the circulation path 4 into a communicating state and sends them out. The recovery / circulation switching state in which the port 8c to which the flow path 6 is connected is closed, and the port 8a to which the upstream branch path 2 is connected and the delivery flow path 6 are connected as shown in FIGS. The port 8c is in a communication state and can be switched to a sending switching state in which the port 8b connected to the circulation path 4 is closed.

  That is, as shown in FIGS. 2 and 3, by setting the downstream side three-way switching valve 7 to the sending / circulation switching state and the upstream side three-way switching valve 8 to the sending switching state, the sending flow As shown in FIG. 4, the circulation three-way switching valve 7 is set to the sending / circulation switching state and the upstream three-way switching valve 8 is set to the recovery / circulation switching state. As shown in FIG. 5, by setting the downstream three-way switching valve 7 to the recovery switching state and the upstream three-way switching valve 8 to the recovery / circulation switching state, Become.

Further, the cleaning device 100 is provided with backflow prevention means P that prevents the fluid F from flowing backward from the upstream branch path 2 to the circulation path 4 side when the pump 9 is stopped. .
In this embodiment, the backflow prevention means P is constituted by a backflow prevention motor-operated valve 10 provided in the upstream branch 2.

  Further, a manually operated maintenance on-off valve 11 is provided in the downstream branch passage 3 of the cleaning device 100.

The cleaning body sorting unit 30 will be described.
As shown in FIGS. 1 and 6, the cleaning body separation unit 30 flows into the cylindrical main body 31 and the cylindrical main body 31 connected to the downstream side 1B of the heat exchanger 20 in the fluid flow path 1. A separation part separation member 32 that separates the cleaning balls SB from the fluid F, and a separation pipe 33 that causes the washing balls SB separated by the separation part separation member 32 to flow to the downstream branch passage 3 are provided. It is configured.

The separating portion filtering member 32 is formed into a cone shape such as a cone using a plate material having a plurality of long holes h so that the flow direction of the fluid F is a longitudinal direction, and the cone-shaped separation is performed. The partial filter separation member 32 is disposed in the cylindrical main body 31 with the large diameter side facing the upstream side.
The sorting tube 33 is provided in a state where the peripheral wall of the cylindrical main body 31 is penetrated and the tip thereof is connected to the top of the cone-shaped sorting part filtering member 32.

A flange portion 32 a is provided at the opening edge on the large diameter side of the conical separation portion filtering member 32.
And the cylindrical main body 31 is the state which clamps the flange part 32a of the separation part filter separation member 32 between the flange part 31a of the cylindrical main body 31, and the flange part 25a of the main pipe 25 which forms the fluid flow path 1. The main pipe 25 is flanged.
Further, the downstream branch passage 3 is configured to be connected to the separation pipe 33.

  That is, the cleaning ball SB that has flowed into the cylindrical main body 31 of the cleaning body sorting unit 30 together with the fluid F flows along the weight-shaped inner wall of the sorting unit filtering member 32 and flows into the sorting tube 33, and the sorting The pipe 33 flows to be separated into the downstream branch passage 3.

The cleaning body accommodation unit 40 will be described.
As shown in FIG. 1, the cleaning body accommodating portion 40 is configured such that the upper portion and the lower portion are partitioned in a sealed container 41 having an opening / closing lid 41 a that can freely open and close the upper opening. 43 is provided. The accommodating portion filtering member 43 is constituted by a porous plate material or a net provided with many holes having a diameter smaller than the diameter of the cleaning ball SB.

A drainage channel 13 having a manually operated drain valve 12 is connected to the bottom of the sealed container 41, and an air vent channel 15 having a manually operated air vent valve 14 is connected to the open / close lid 41 a of the sealed container 41. Is connected.
As will be described later, the drain valve 12 and the air vent valve 14 are opened when the cleaning device 100 is stopped and maintenance is performed, and are kept closed except during the maintenance.

The portion corresponding to the upper side of the container separation member 43 in the sealed container 41 and the port 7c of the downstream three-way switching valve 7 are connected by the flow passage portion 16 for forming the recovery flow passage, A portion of the sealed container 41 corresponding to the upper side of the accommodating portion filtering member 43 and the port 8c of the upstream three-way switching valve 8 are connected by a flow passage portion 17 for forming a flow passage for delivery.
Furthermore, the bottom part of the airtight container 41 and the intermediate part of the circulation path 4 are connected by a common flow path part 18.

That is, the recovery flow path forming flow path portion 16 and the shared flow path portion 18 constitute the recovery flow path 5 and the delivery flow path forming flow path portion 17 and the shared flow path portion 18. The delivery channel 6 is constituted by the channel portion 18.
And the flow path part which connects the washing | cleaning body accommodating part 40 in the collection flow path 5 and the intermediate part of the circulation path 4, and the washing | cleaning body accommodation part 40 in the sending flow path 6, and the intermediate part of the circulation path 4 The flow path portion to be connected is configured to be shared by the shared flow path portion 18.

  When the common flow path portion 18 is described further, the other end of the pipe member 44 having one end connected to the bottom of the sealed container 41 is connected to the intermediate portion of the circulation path 4 using a T-shaped joint member 45. The common flow path portion 18 is configured by the pipe member 44 and the port 45a to which the pipe member 44 of the joint member 45 is connected.

The cleaning ball SB is removed from the fluid F in a state of being sandwiched between the flange portion of the pipe member 44 connected to the joint member 45 and the flange portion of the port 45a connected to the pipe member 44 of the joint member 45. A filter member 46 for preventing reverse inflow is provided. The reverse inflow blocking filtering member 46 is constituted by a porous plate or net provided with many holes having a diameter smaller than that of the cleaning ball SB.
In other words, the reverse inflow blocking filtering member 46 is provided in the shared flow path portion 18.

  That is, when the fluid F flows through the closed container 41 from the downstream connection portion 4d to the circulation passage 4 through the recovery passage 5d, the cleaning body storage portion 40 passes along with the fluid F. The flowing cleaning ball SB is filtered by the storage section filtration member 43 and collected on the storage section filtration member 43, while the fluid F passes from the circulation path 4 through the delivery flow path 6 to the upstream connection section 4u. In the case of flowing through the sealed container 41, the cleaning ball SB on the storage portion separation member 43 is sent to the upstream branch path 2 together with the flow of the fluid F.

  The operation control device 50 controls the operation of the cleaning device 100 by controlling the operation of the downstream side three-way switching valve 7, the upstream side three-way switching valve 8, the backflow prevention electric valve 10 and the like in addition to the pump 9. Is configured to control.

Hereinafter, the control operation of the operation control device 50 will be described.
As shown in FIG. 4, the operation control device 50 operates the pump 9 and opens the backflow preventing motor-operated valve 10, sets the downstream side three-way switching valve 7 to the delivery / circulation switching state, and sets the upstream side The three-way switching valve 8 is set to the recovery / circulation switching state, that is, the flow state switching means V is set to the circulation flow state to execute the cleaning body circulation operation.
Further, before the cleaning body circulation operation, the operation control device 50 operates as shown in FIG. 2 and FIG. 3 in the state where the pump 9 is operated and the backflow prevention motor-operated valve 10 is opened. A cleaning body delivery operation is performed in which the valve 7 is set to the delivery / circulation switching state and the upstream three-way switching valve 8 is set to the delivery switching state, that is, the flow state switching means V is set to the delivery flow state. After the cleaning body circulation operation, as shown in FIG. 5, with the pump 9 operated and the backflow prevention motor-operated valve 10 opened, the downstream three-way switching valve 7 is set to the recovery switching state. Further, the cleaning body recovery operation is performed in which the upstream side three-way switching valve 8 is set to the recovery / circulation switching state, that is, the flow state switching means V is set to the recovery flow state.

Specifically, the operation time for sending operation for executing the cleaning body delivery operation, the operation time for circulation operation for executing the cleaning body circulation operation, the operation time for recovery operation for executing the cleaning body recovery operation, and the delivery thereof An operation cycle longer than the total of the operation time for operation, the operation time for circulation operation, and the operation time for recovery operation is set.
Then, every time the operation cycle has passed and the operation start timing is reached, the operation control device 50 executes the cleaning body delivery operation for the delivery operation time, and subsequently performs the cleaning body circulation operation for the circulation operation operation. Then, the cleaning body recovery operation is executed for the recovery operation time, and the cleaning device 100 is stopped when the cleaning body recovery operation ends.

Hereinafter, description will be added for each of the above operations.
First, the state when the cleaning apparatus 100 is stopped will be described.
When the cleaning body recovery operation is completed, the operation control device 50 stops the pump 9, closes the backflow prevention motor-operated valve 10 and closes the downstream three-way switching valve 7 to the recovery switching state, as shown in FIG. Then, the upstream side three-way switching valve 8 is brought into a stopped state in which it is switched to the recovery / circulation switching state.

In this stopped state, the backflow preventing motor-operated valve 10 is closed, so that even when the pump 9 is stopped, the fluid F flows back through the upstream branch path 2 from the fluid flow path 1 side to the circulation path 4 side. Is blocked.
Then, the fluid F is prevented from flowing back through the upstream branching path 2, so that the fluid F passes from the upstream branching path 2 through the circulation path 4 and the cleaning body container 40 to the downstream branching path 3. Since the passage through the flow path toward the fluid flow path 1 is prevented, the entire amount of the fluid F can be passed through the heat exchanger 20 in the stopped state, and the pump It can be avoided that 9 is reversed.

In the cleaning body circulation operation, as shown in FIG. 4, the cleaning ball SB moves along with the fluid F from the downstream branch path 3 to the upstream branch path 2 through the circulation path 4 over its entire length. Then, it circulates between the heat exchanger 20 and the circulation path 4.
Therefore, since the cleaning ball SB during the cleaning body circulation operation does not pass through the cleaning body storage unit 40, the inner wall of the sealed container 41 of the cleaning body storage unit 40 of the cleaning ball SB or the storage unit separation member. Wear due to collision with 43 is prevented.

  In the cleaning body recovery operation, as shown in FIG. 5, the fluid F passes from the downstream branch path 3 to the recovery flow path 5 and the flow path portion bypassed by the delivery flow path 6 in the circulation path 4. Since the fluid F flows through the upstream branching passage 2 via the cleaning body storage section 40 provided in the recovery flow path 5, the fluid F is separated by the cleaning body separation section 30 and together with the fluid F. The flowing cleaning ball SB is filtered by the storage section filtering member 43 and collected on the storage section filtering member 43 in the cleaning body storage section 40, that is, on the storage section side.

  The operation time for the recovery operation is set as a time during which the cleaning ball SB can be completely recovered on the container filtering member 43, and the operation time for the recovery operation can be set by experiment, calculation, or the like. .

  When the cleaning body delivery operation is executed, as shown in FIG. 2, the fluid F is separated from the downstream branch passage 3 by the recovery passage 5 in the circulation passage 4 and the delivery passage 6. Since the fluid F flows from the side opposite to the storage unit side toward the storage unit side, the fluid F flows through the upstream branch passage 2 via The cleaning ball SB recovered on the storage portion separation member 43 in the cleaning body storage section 40 in the cleaning body recovery operation flows out from the cleaning body storage section 40 together with the fluid F to the delivery channel 6 and is sent out. The upstream branch path 2 flows from the use flow path 6.

Therefore, by executing the cleaning body delivery operation, the cleaning ball SB on the storage portion filtering member 43 of the cleaning body storage portion 40 is placed on the flow of the fluid F as shown in FIG. It can be sent to the branch path 2.
The operation time for the delivery operation is set, for example, to a time when the cleaning ball SB first delivered from the cleaning body accommodation unit 40 reaches before the downstream side three-way switching valve 7 as shown in FIG.

The operation time for the sending operation can be set by experiment, calculation, or the like.
Incidentally, it takes a switching time to change the switching state of each of the downstream side three-way switching valve 7 and the upstream side three-way switching valve 8, and the switching time is, for example, 6 to 10 seconds.
For example, in the cleaning body circulation operation, the time required for the cleaning ball SB to circulate once in the circulation path is 15 seconds, and the switching time required for each of the downstream side three-way switching valve 7 and the upstream side three-way switching valve 8 is. In the case of 6 seconds, the operation time for sending operation is set to about 8 seconds in consideration of the time required for switching.

In addition, due to factors such as variations in the flow state of the cleaning ball SB, the cleaning ball SB passes through the flow path portion bypassed by the recovery flow path 5 in the circulation path 4 during the cleaning body delivery operation, Even when the shared flow path portion 18 in the delivery flow path 6 is reached, the shared flow path portion 18 is provided with the reverse inflow blocking filtering member 46 so as to filter the cleaning balls SB. Therefore, it is possible to prevent the cleaning ball SB from flowing backward to the lower side of the storage portion filtering member 43 in the cleaning body storage portion 40.
Therefore, in the cleaning body circulation operation, all or substantially all of the cleaning balls SB accommodated in the cleaning apparatus 100 can be circulated between the heat exchanger 20 and the circulation path 4 together with the fluid F, so that the cleaning apparatus 100 can be efficiently operated. The heat exchanger 20 can be cleaned.

The maintenance for adding the cleaning ball SB to the cleaning body storage unit 40 or replacing the cleaning ball SB in the cleaning body storage unit 40 is performed in the state where the cleaning device 100 is stopped as described above. The on-off valve 11 is closed.
Then, the drain valve 12 and the air vent valve 14 are opened, the fluid F is discharged from the sealed container 41, and the open / close lid 41a is opened.
That is, since the backflow prevention motor-operated valve 10 and the maintenance on-off valve 11 are closed, the fluid F flowing through the fluid flow path 1 flows out of the air-tight container 41 even when the open / close lid 41a of the air-tight container 41 is opened. Can be avoided.

  Hereinafter, second to fourth embodiments of the present invention will be described. In each embodiment, the configuration is the same as that of the first embodiment except that the specific configuration of the backflow prevention means P and the control configuration of the operation control device 50 are different. For the constituent elements having the same action, the description thereof is omitted by giving the same reference numerals in order to avoid redundant description, and a configuration different from that of the first embodiment will be described.

[Second Embodiment]
As shown in FIG. 7, in this second embodiment, the backflow prevention means P is provided in the upstream branching passage 2 so as to allow only the flow from the circulation passage 4 side to the fluid passage 1 side. A stop valve 19 is used. FIG. 7 shows a state at the time when the cleaning device 100 is stopped by the operation control device 50.

  The control configuration of the operation control device 50 for operating the cleaning body delivery operation, the cleaning body circulation operation and the cleaning body recovery operation, and stopping the cleaning device 100 is the operation of the backflow prevention motor-operated valve 10. Since it is the same as that of said 1st Embodiment except having abbreviate | omitted, description is abbreviate | omitted.

[Third Embodiment]
As shown in FIG. 8, in this third embodiment, the backflow prevention means P includes a port 8b connected to the circulation path 4 and a delivery flow in addition to the recovery / circulation switching state and the delivery switching state. In the upstream three-way switching valve 8 configured to be switched to the backflow prevention switching state in which the port 8c connected to the path 6 is closed and the port 8a connected to the upstream branch path 2 is opened. It is configured. FIG. 8 shows a state when the cleaning device 100 is stopped by the operation control device 50.

  The control configuration of the operation control device 50 for operating the cleaning body delivery operation, the cleaning body circulation operation and the cleaning body recovery operation, and stopping the cleaning device 100 is the operation of the backflow prevention motor-operated valve 10. The description is omitted because it is the same as the first embodiment except that the upstream side three-way switching valve 8 is switched to the backflow prevention switching state when the cleaning device 100 is stopped.

[Fourth Embodiment]
As shown in FIG. 9, in this fourth embodiment, the backflow prevention means P includes a port 7b connected to the circulation path 4 and a recovery flow in addition to the delivery / circulation switching state and the recovery switching state. The downstream three-way switching valve 7 configured to be switched to the backflow prevention switching state in which the port 7c connected to the path 5 is closed and the port 7a connected to the downstream branch path 3 is opened. It is configured. FIG. 9 shows a state when the cleaning device 100 is stopped by the operation control device 50.

  In addition, the manually operated maintenance on-off valve 11 provided in the downstream branch path 3 in the first embodiment is provided in the upstream branch path 2 in the fourth embodiment.

  The control configuration of the operation control device 50 for operating the cleaning body delivery operation, the cleaning body circulation operation and the cleaning body recovery operation, and stopping the cleaning device 100 is the operation of the backflow prevention motor-operated valve 10. The description is omitted because it is the same as that of the first embodiment except that the downstream three-way switching valve 7 is switched to the backflow prevention switching state when the cleaning apparatus 100 is stopped.

[Another embodiment]
Next, another embodiment will be described.
(A) The specific configuration of the flow state switching means V is limited to a configuration including the downstream three-way switching valve 7 and the upstream three-way switching valve 8 as illustrated in the above embodiments. It is not a thing.
For example, in the recovery flow path 5, the flow path part on the downstream side connection part 4 d side of the cleaning body accommodating part 40, the flow path part bypassed by the recovery flow path 5 in the circulation path 4, Four motor-operated valves provided separately for each of the flow path part on the upstream side connection part 4u side of the cleaning body accommodating part 40 and the flow path part bypassed by the delivery flow path 6 in the circulation path 4 Can be configured.

(B) In each of the above embodiments, the pump 9 is provided in the downstream branch 3, but the pump 9 may be provided in the upstream branch 2.

(C) The downstream three-way switching valve 7 is configured to be switched to the reverse flow prevention switching state, and the upstream three-way switching valve 8 is configured to be switchable to the reverse flow prevention switching state. When the operation control device 50 stops the cleaning device 100, the downstream side three-way switching valve 7 is switched to the backflow prevention switching state and the upstream side three-way switching valve 8 is switched to the backflow prevention switching state. If it comprises, it will become possible to abbreviate | omit the said maintenance on-off valve 11 provided in said each embodiment.

(D) In each of the above embodiments, a sponge-like cleaning ball is used as the cleaning body. However, another cleaning body such as a cleaning body made of rubber or resin that is not spongy may be used.

(E) The installation location of the filter member 46 for preventing reverse inflow in the shared flow path portion 18 is not limited to the flange portion of the port 45a illustrated in the above embodiment. For example, the port It may be within 45a.
Further, as shown in FIG. 10, the reverse inflow blocking filtering member 46 is formed in a bottomed cylindrical shape having a flange portion in the opening, and the reverse inflow blocking filtering member 46 of the bottomed cylindrical shape is formed. In a state in which the bottom portion is brought close to the circulation path 4 and is sandwiched between the flange portion of the pipe member 44 and the flange portion of the port 45a in the joint member 45 in the same manner as the above-described embodiment. If provided, it is possible to prevent the cleaning ball SB from flowing into the shared flow path portion 18, and therefore, the cleaning ball SB is prevented from staying in the shared flow path portion 18 during the cleaning body circulation operation. can do.

The figure which shows the structure of the washing | cleaning apparatus which concerns on 1st Embodiment, and the stop state of a washing | cleaning apparatus The figure which shows the state at the time of the washing | cleaning body delivery driving | operation of the washing | cleaning apparatus which concerns on 1st Embodiment. The figure which shows the state at the time of completion | finish of the washing body delivery operation | movement of the washing | cleaning apparatus which concerns on 1st Embodiment. The figure which shows the state at the time of the washing body circulation driving | operation of the washing | cleaning apparatus which concerns on 1st Embodiment. The figure which shows the state at the time of the washing | cleaning body collection | recovery driving | operation of the washing | cleaning apparatus which concerns on 1st Embodiment. The disassembled perspective view which shows the washing body separation apparatus of the washing | cleaning apparatus which concerns on 1st Embodiment. The figure which shows the structure of the washing | cleaning apparatus which concerns on 2nd Embodiment, and the stop state of a washing | cleaning apparatus. The figure which shows the structure of the washing | cleaning apparatus which concerns on 3rd Embodiment, and the stop state of a washing | cleaning apparatus. The figure which shows the structure of the washing | cleaning apparatus which concerns on 4th Embodiment, and the stop state of a washing | cleaning apparatus The figure which shows the installation state of the filter separation member for backflow prevention which concerns on another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluid flow path 2 Upstream side branch path 3 Downstream side branch path 4 Circulation path 4d Downstream side connection part 4u Upstream side connection part 5 Recovery path 6 Outlet path 7 Downstream side three-way switching valve 8 Upstream side three way switching valve 9 Pump 18 shared flow path 20 Heat exchanger (cleaning target)
22 Heat Transfer Tube 30 Cleaning Body Separation Unit 40 Cleaning Body Storage Unit 43 Storage Unit Filtering Member 46 Reverse Inflow Blocking Filtering Member 50 Operation Control Unit P Backflow Blocking Unit SB Cleaning Ball (Cleaning Body)
V Current state switching means

Claims (6)

A cleaning body that flows along with the fluid downstream of the cleaning target portion provided in the fluid flow path through which the fluid flows and a downstream branch path that branches from the downstream side of the cleaning target portion of the fluid flow path. It has a cleaning body separation part that separates
A circulation path that connects the downstream branch path and an upstream branch path that branches from the upstream side of the cleaning target portion in the fluid flow path, and the upstream branch path or the downstream branch path, A pump capable of conveying the fluid in a direction from the downstream branch path toward the upstream branch path;
An operation control means capable of executing a cleaning body circulation operation for circulating the cleaning body together with the fluid between the cleaning target portion and the circulation path and cleaning the cleaning target portion in a state where the pump is operated. A cleaning device comprising:
A recovery flow path branched from a downstream connection portion between the circulation path and the downstream branch path and connected to an intermediate portion of the circulation path, and an upstream connection between the circulation path and the upstream branch path A flow path for delivery connected to an intermediate portion of the circulation path branched from the section is provided,
A housing part filtering member that filters the cleaning body from the fluid as the fluid flows through the recovery flow path from the downstream connection part toward the circulation path; and the circulation path A cleaning body containing section for sending the cleaning body to the upstream branch passage as the fluid flows through the delivery flow path from the upstream connection section to the upstream connection section. Arranged in the middle part of each of the flow paths,
A circulation flow state in which the fluid is passed from the downstream branch passage to the upstream branch passage through the entire length of the circulation passage, and the fluid is collected from the downstream branch passage to the circulation passage. A flow-through state for sending through the flow-path portion bypassed by the flow path and the flow-out channel for sending to the upstream-side branch, and the recovery fluid from the downstream-side branch A flow state that is alternatively switchable to a recovery flow state that flows through the upstream branch path via a flow path and a flow path portion that is bypassed by the delivery flow path in the circulation path Switching means is provided,
The operation control means is configured to execute the cleaning body circulation operation by setting the flow state switching means to the circulation state, and operates the pump before the cleaning body circulation operation. In this state, a cleaning body delivery operation is performed to bring the flow state switching means into the delivery flow state, and after the cleaning body circulation operation, the flow state switching means is used for the recovery in a state where the pump is operated. A cleaning apparatus configured to execute a cleaning body recovery operation to be in a flow state.   The flow state switching means includes a downstream three-way switching valve connected to the circulation path, the downstream branch path, and the recovery channel, the circulation path, the upstream branch path, and the delivery channel. The cleaning apparatus according to claim 1, further comprising an upstream three-way switching valve connected to each other.   The cleaning apparatus according to claim 1 or 2, further comprising a backflow prevention means for preventing the fluid from flowing back from the upstream branch path from the fluid flow path side to the circulation path side when the pump is stopped. A flow path portion that connects the cleaning body accommodation section and the intermediate portion of the circulation path in the recovery flow path, and a connection between the cleaning body storage section and the intermediate section of the circulation path in the delivery flow path. The channel part is configured to be shared,
The cleaning apparatus according to any one of claims 1 to 3, wherein a filter member for blocking reverse inflow for filtering the cleaning body from the fluid is provided in the shared flow path portion.   5. The heat exchanger according to claim 1, wherein the object to be cleaned is a heat exchanger that exchanges heat between the fluid flowing through the heat transfer tube and the heat medium flowing outside the heat transfer tube. The cleaning device described.   The cleaning apparatus according to claim 1, wherein the cleaning body is a sponge-like cleaning ball.

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