JP2020168054A - Show case washing device - Google Patents

Abstract

To provide a show case washing device capable of automatically washing a lower part space of a show case without transferring commodities.SOLUTION: A show case washing device 80 comprises a washing nozzle 60 for spraying washing water to a lower part space A. Therefore, without transferring commodities S on a commodity display shelf 24, washing of the lower part space A can be performed. Especially, in a configuration in which the show case washing device 80 performs automatically, a washing operation by a timer, an operator can perform washing of a lower part space A without performing any operation. In addition, in the show case washing device 80, spraying of the washing water is performed from a washing nozzle 60 provided at a position separated from a scupper 20. Therefore, garbage or the like in a drain ditch 26 is pressed and flowed to the scupper 20 sequentially, and even a relatively heavy garbage can be discharged from the scupper 20. In addition, a large amount of washing water is not required for once washing, for suppressing loads applied to a water feeding facility and a drainage facility.SELECTED DRAWING: Figure 1

Description

The present invention relates to a showcase cleaning device that cleans the lower space under a product display shelf of a refrigerated / frozen showcase.

For example, in commercial facilities and stores that handle food products, showcases in which products are stored in a frozen or refrigerated state are often used. Among such showcases, particularly in an open type showcase in which the front is open, cold air is circulated to form a so-called air curtain, as described in [Patent Document 1] below, and the inside of the refrigerator is formed. Generally, it keeps cold. Many of these open-type showcases have a lower space under the product display shelf at the bottom, which is equipped with an internal fan for circulating cold air and a drainage ditch for collecting drain water. ..

Japanese Unexamined Patent Publication No. 2001-221561

However, as described above, drain water or the like drips into this lower space, and dust or the like in the air that is mixed when sucking cold air invades, so that regular cleaning is required. However, in order to clean the lower space, it is necessary to move all the products on the product display shelf and redisplay them after cleaning, which imposes a heavy work load. In addition, for example, cleaning itself is necessary in stores that are open 24 hours a day. It is difficult and cannot be done frequently. For this reason, dirt gradually accumulates in the lower space, resulting in an unsanitary condition and causing rust and corrosion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a showcase cleaning device capable of automatically cleaning the lower space of a showcase without moving a product.
It should be added that the inventors of the present application have made the invention described in Japanese Patent Application No. 2019-008313, in which drain water discharged from a cooling facility is pumped up and drained through an upper drainage pipe.

The present invention
(1) A cleaning device for a showcase 10 having a lower space A provided with a drain port 20.
A plurality of cleaning nozzles 60 provided along the longitudinal direction of the lower space A, and
A water supply pipe 62 that supplies cleaning water to the cleaning nozzle 60,
An opening / closing means 64 for turning on / off the supply of cleaning water to the cleaning nozzle 60, and
It has a control unit 66 that controls the opening / closing means 64, and
The control unit 66 provides the showcase cleaning device 80, which is characterized in that the cleaning water is sprinkled and stopped in the lower space A in order from the cleaning nozzle 60 far from the drain port 20. Solve the above problems.
(2) The cleaning nozzle 60 is rotatably formed and has a substantially S-shape or a substantially crank shape having sprinkler holes 60b at both ends, and the cleaning nozzle 60 is rotated by ejecting cleaning water from the sprinkling holes 60b. The above problem is solved by providing the showcase cleaning device 80 according to the above (1).
(3) Further having a pumping mechanism 70 for pumping the washing water discharged from the drain port 20 to the drain drain pipe 14 provided above.
The pumping mechanism 70
A lower backflow prevention member 30a that is connected to the drain pipe 12 connected to the drainage port 20 and prevents backflow of the washing water to the showcase 10 side.
A storage unit 32 connected to the drain pipe 12 via the lower backflow prevention member 30a,
A pumping pipe 34 connected to the storage unit 32 and extended upward,
An air separation unit 36 installed above the pumping pipe 34 and separating the air in the pumping pipe 34,
An upper backflow prevention member 30b provided between the pumping pipe 34 and the drain drainage pipe 14 to prevent backflow of wash water to the storage portion 32 side.
It has an air suction supply unit 40 that sucks air in the pumping pipe 34 from the air separation unit 36 and pumps air to the storage unit 32.
The air suction supply unit 40 is characterized in that the washing water stored in the storage unit 32 is pumped through the pumping pipe 34 by sucking air from the pumping pipe 34 and pumping air to the storage unit 32. The above problem is solved by providing the showcase cleaning device 80 according to 1) or (2).
(4) The pumping mechanism 70 further includes an air pumping unit 50 that sends compressed air to the air suction supply unit 40.
The air suction supply unit 40 is provided with a narrow portion 44 inside, and a vacuum is generated in which compressed air from the air pumping portion 50 sucks air from the air separation portion 36 due to a negative pressure when it passes through the narrow portion 44. The above problem is solved by providing the showcase cleaning device 80 according to the above (3), which is an apparatus.

The showcase cleaning device according to the present invention includes a cleaning nozzle for sprinkling cleaning water in the lower space of the showcase. Therefore, the lower space can be cleaned without moving the products on the product display shelf. As a result, the burden on the operator can be greatly reduced. Further, the showcase cleaning device according to the present invention sprinkles cleaning water in order from a cleaning nozzle located far from the drain port. Therefore, the dust and the like in the drainage ditch are sequentially washed away to the drainage port side, and even relatively heavy dust can be discharged from the drainage port.

It is a figure explaining the showcase cleaning apparatus which concerns on this invention. It is a figure explaining the showcase cleaning apparatus which concerns on this invention provided with a pumping mechanism. It is a schematic sectional drawing of the air suction supply part of the pumping mechanism which concerns on this invention.

The showcase cleaning device 80 according to the present invention will be described with reference to the drawings. Here, FIG. 1A is a schematic view from the side surface direction showing the inside of the lower space A of the showcase 10, and FIG. 1B is a schematic view from the upper surface direction.

First, the showcase 10 mainly displays products such as food products while being refrigerated or frozen, and includes a lower space A having a drain port 20. Here, an open type showcase will be described as an example of the showcase 10, but the present invention is not limited to the open type showcase, and in addition to the closed type showcase, the lower part having the drain port 20 is provided. As long as it has a space A, it can be applied to any showcase.

Here, in a general open type showcase 10, an internal fan 22 for circulating cold air in the showcase 10 in the lower space A, drain water, washing water, and falling water from the product display shelf 24 side. It has a drainage ditch 26 for collecting and the like. The drainage ditch 26 is gently inclined toward the drainage port 20, and each water that has fallen into the lower space A flows down the drainage ditch 26 and is appropriately discharged from the drainage port 20. Further, the lower space A is closed by the lid member 24a, and the product display shelf 24 is placed on the lid member 24a. Then, the product S is displayed on the product display shelf 24.

As shown in FIG. 1B, the showcase cleaning device 80 according to the present invention has a plurality of cleaning nozzles 60 provided along the longitudinal direction of the lower space A (usually, the front left and right directions of the showcase 10). A water supply pipe 62 for supplying cleaning water to the cleaning nozzle 60, an opening / closing means 64 for turning on / off (opening / closing) the supply of cleaning water to the cleaning nozzle 60, and a control unit 66 for controlling the opening / closing means 64. And have. The showcase cleaning device 80 according to the present invention can be retrofitted to the existing showcase 10.

Further, the water supply pipe 62 constituting the showcase cleaning device 80 has a main pipe 62a and a branch pipe 62b that branches from the main pipe 62a and connects to each cleaning nozzle 60, and one end of the main pipe 62a is, for example, a water supply. Connect with water supply pipes such as. It is preferable that the water supply pipe 62 is provided with a drainage mechanism. In this configuration, by discharging the washing water remaining in the water supply pipe 62 when not in use, it is possible to prevent the washing water from freezing due to a temperature drop in the lower space A. Further, as the opening / closing means 64, a well-known on-off valve or the like that opens / closes the branch pipe 62b according to the instruction of the control unit 66 can be used. Further, although an arithmetic device such as a microcomputer or a sequencer may be used for the control unit 66, it is preferable to use a relatively simple one using a timer and a relay switch from the viewpoint of cost. The showcase cleaning device 80 may be started by pressing the start button or the like, but a start time is set in the timer constituting the control unit 66, and the showcase cleaning device 80 is automatically started at a set time every day, for example, at night time. The cleaning operation may be performed.

The shape of the cleaning nozzle 60 constituting the showcase cleaning device 80 is not particularly limited, and any cleaning nozzle 60 may be used. However, it is desirable to use a tube having a relatively small diameter of about φ3 mm to φ8 mm, preferably about φ5 mm. In the configuration in which the cleaning nozzle 60 uses a thin tube as described above, the water hammer phenomenon that occurs when the cleaning water is turned on and off can be reduced. In addition, it is easy to install and process and has high workability.

Next, a cleaning nozzle 60 suitable for the present invention will be described. The cleaning nozzle 60 suitable for the present invention has a thin tube bifurcated, and then sprinkling holes 60b are provided at both ends of the bifurcated portion 60a, and the bifurcated portion 60a has a substantially S-shape or a substantially crank shape when viewed from above. Then, the merging portion 60c of the bifurcated portion 60a is rotatably formed with respect to the branch pipe 62b. According to this configuration, when the cleaning water flows down to the cleaning nozzle 60, the cleaning water is ejected from the sprinkler holes 60b on both sides of the bifurcated portion 60a in opposite directions, and the cleaning nozzle 60 is rotated by the ejection of the cleaning water. In this configuration, the cleaning nozzle 60 can be rotated without using energy such as electric power, and the cleaning water can be sprinkled over a wide range to efficiently clean the lower space A. Furthermore, by making the cleaning nozzle 60 a rotary type and configuring it as a member separate from the water supply pipe 62, even if a problem occurs in the cleaning nozzle 60, the cleaning nozzle 60 can be replaced.

Next, the cleaning operation of the showcase cleaning device 80 according to the present invention will be described. First, when the timer of the control unit 66 is activated at a predetermined time set in advance, the control unit 66 closes the drainage mechanism and supplies wash water such as tap water to the water supply pipe 62. At this time, all the opening / closing means 64 are in the closed state. Next, the control unit 66 opens the opening / closing means 64 of the cleaning nozzle 60 located at the position farthest from the drain port 20. As a result, cleaning water is supplied to the cleaning nozzle 60 from the main pipe 62a of the water supply pipe 62 via the branch pipe 62b. The supplied cleaning water is ejected from the confluence portion 60c of the cleaning nozzle 60 through the bifurcated portion 60a and from the sprinkler hole 60b into the lower space A. The washing nozzle 60 is rotated by the ejection of the washing water, and the washing water is sprinkled over a wide range. As a result, dirt, dust, and the like on the sprinkled portion flow into the drainage ditch 26 together with the washing water and are discharged from the drainage port 20.

When the watering operation of the cleaning nozzle 60 at the farthest position is performed for a predetermined time set in advance, the control unit 66 closes the opening / closing means 64 to stop the watering operation, and the drain ports 20 to 2 The opening / closing means 64 of the cleaning nozzle 60 located at the farthest position is opened. As a result, the cleaning water is supplied to the cleaning nozzle 60 located at the second farthest position from the drain port 20, and the cleaning water is sprinkled while rotating. Then, dirt, dust, and the like on the sprinkled portion are poured into the drainage ditch 26 together with the washing water and discharged from the drainage port 20. Next, when the watering operation by the cleaning nozzle 60 is performed for a predetermined time set in advance, the control unit 66 closes the opening / closing means 64 of the cleaning nozzle 60 to stop the watering operation and stops the watering operation from the drain port 20. The opening / closing means 64 of the cleaning nozzle 60 at the third distant position is opened. As a result, the cleaning nozzle 60 located at the third farthest position from the drain port 20 sprinkles the cleaning water while rotating, and the dirt and dust of the sprinkled portion are poured into the drain groove 26 together with the cleaning water and discharged from the drain port 20. To do. When these operations are performed in order from the cleaning nozzle 60 farthest from the drain port 20 to the cleaning nozzle 60 closest to the drain port 20, the control unit 66 stops the supply of cleaning water to the water supply pipe 62 and at the same time. The drainage mechanism is operated to discharge the washing water remaining in the water supply pipe 62 to, for example, the drainage ditch 26. Then, the showcase cleaning device 80 waits until the next cleaning operation start time.

As described above, since the showcase cleaning device 80 according to the present invention sprinkles the cleaning water in order from the cleaning nozzle 60 located far from the drain port 20, dust and the like in the drain groove 26 are sequentially moved to the drain port 20 side. Even relatively heavy dust that has been washed away can be discharged from the drain port 20. Further, since water is sprinkled by the cleaning nozzle 60 in order, a large amount of cleaning water is not required at one time, and the load on the water supply equipment and the drainage equipment can be suppressed to a low level.

Next, a pumping mechanism 70 suitable for the showcase cleaning device 80 according to the present invention will be described with reference to FIG. Although the pumping and drainage of the washing water sprinkled by the showcase washing device 80 will be mainly described here, the pumping mechanism 70 performs the same operation for other drain waters.

The pumping mechanism 70 shown in FIG. 2 pumps the wash water discharged from the drain pipe 12 to the drain drain pipe 14 provided above and discharges the water, and the lower backflow prevention member 30a connected to the drain pipe 12 A storage unit 32 connected to the drain pipe 12 via the lower backflow prevention member 30a, a pumping pipe 34 connected to the storage unit 32 and extending upward, and a pumping pipe 34 installed above the pumping pipe 34 and in the pumping pipe. The air separation unit 36 that separates the air, the upper backflow prevention member 30b provided between the pumping pipe 34 and the drain drainage pipe 14, and the air suction unit 36 sucks the air and pumps the air to the storage unit 32. It has an air suction supply unit 40 and a pumping control unit (not shown). The drain pipe 12 is connected to the drain port 20 of the lower space A, and the washing water or the like discharged from the drain port 20 is sent to the storage unit 32 through the drain pipe 12.

Further, the storage unit 32 temporarily stores the washing water (and drain water) discharged from the showcase 10, and any storage unit 32 may be used as long as it has a certain volume. However, since the washing water (drain water) discharged from the showcase 10 basically flows into the storage unit 32 by natural flow, the storage unit 32 is set at a position equal to or lower than the drain pipe 12 and the drain drain port 12a. Further, the storage unit 32 may be provided on the floor on which the showcase 10 is installed, or may be provided under the floor when there is a space under the floor. Even when the storage unit 32 is provided under the floor, the stored wash water is pumped up and discharged through the drain drainage pipe 14 above, so that it is not necessary to construct a drainage route or the like under the floor and the installation is relatively easy. is there. Further, when the storage unit 32 is provided on the floor, as described above, the storage unit 32 allows the washing water to flow in by natural flow, so that the storage unit 32 is low in height, especially when the drain drain port 12a of the showcase 10 is located below. Is preferable, and it is particularly preferable to use a pipe member such as a prism or a cylinder. Further, a water level measuring means 32a for acquiring the water level of the washing water (drain water) is provided in the storage unit 32, and when the water level of the water in the storage unit 32 exceeds a preset operating threshold value, the pumping mechanism 70 is provided. It is preferable to configure it so that it operates as a pump.

Then, the drain pipe 12 is connected to the storage unit 32 via the lower backflow prevention member 30a. The lower backflow prevention member 30a is for preventing the drain water of the storage portion 32 from flowing back to the showcase 10 side due to the air pressurization to the storage portion 32, and is a well-known check valve or the like. A valve can be used.

Further, a pumping pipe 34 having one end located near the bottom of the storage unit 32 and extending upward is connected to the storage unit 32. Then, an air separation portion 36 is provided on the other end side of the pumping pipe 34, and is connected to a drain drainage pipe 14 arranged in, for example, behind the ceiling via an upper backflow prevention member 30b. Further, the other end of the drain drainage pipe 14 is connected to a predetermined drainage facility 16 such as a drainage ditch, a drainage port, or a drainage tank. The air separation unit 36 is a gas-liquid separation mechanism that separates gas (air) and liquid (washing water, drain water) in the pumping pipe 34, and a well-known air bleeding valve or the like can be used. Further, as the upper check valve 30b, a well-known check valve such as a check valve can be used as in the case of the lower check valve 30a described above.

Further, the pumping mechanism 70 includes an air suction supply unit 40 as a characteristic configuration thereof. As the air suction supply unit 40, any one may be used as long as it can suck and pump air, but a well-known vacuum generator that sucks and pumps (discharges) air at the same time by compressed air is used. Is particularly preferred. In this case, the pumping mechanism 70 has a well-known air pumping unit 50 such as an air compressor that delivers compressed air to the air suction supply unit 40. In the configuration in which the vacuum generator is used for the air suction supply unit 40, air suction and pumping can be achieved with one member, so that the piping path can be simplified and the scale of the device can be reduced. Further, since vacuum generators having various sizes and specifications are commercially available, the air suction supply unit 40 having appropriate dimensions and capacities can be obtained relatively easily.

Here, a schematic cross-sectional view of the vacuum generator (air suction supply unit 40) is shown in FIG. The air suction supply unit 40 as a vacuum generator includes a supply port 42a to which compressed air is supplied, a narrow portion (nozzle portion) 44 through which compressed air passes, a diffuser portion 46 located downstream of the narrow portion 44, and a diffuser portion 46. It has a suction port 42b for sucking air by a negative pressure generated when the compressed air passes through the narrow portion 44, and an exhaust port 42c for exhausting the supplied compressed air and the sucked air. A compressed air pipe 48a extending from the air pressure feeding portion 50 is connected to the supply port 42a, a suction pipe 48b extending from the air separation portion 36 is connected to the suction port 42b, and the pressure adjusting means 52 is connected to the exhaust port 42c. The air supply pipe 48c extending to is connected. The pressure adjusting means 52 is for adjusting the pressure of the air supplied to the storage unit 32, and a well-known member such as a regulator can be used.

Then, the pressure adjusting means 52 and the storage unit 32 are connected via the air supply pipe 48d. The compressed air pipes 48a and the air supply pipes 48c before and after the air suction supply unit 40 are provided with auxiliary tanks for buffering sudden changes in air pressure when the air pressure feeding unit 50 is started or stopped or when the load of the storage unit 32 fluctuates. You may. Further, the compressed air pipe 48a and the air supply pipe 48d are provided with on-off valves 54a and 54b whose opening and closing are controlled by the pumping control unit. Of these, the on-off valve 54b may be provided in the pressure adjusting means 52.

Next, the operation of the pumping mechanism 70 will be described. Although the operation of pumping the cleaning water generated by the cleaning operation of the showcase cleaning device 80 will be described here, as described above, this pumping operation is also performed on the normal drain water.

First, in normal times, the pumping mechanism 70 is in the standby state, the air pumping unit 50 is stopped, the on-off valve 54a is in the closed state, and the on-off valve 54b is in the open state. Therefore, the pressure inside the storage unit 32 becomes normal. Next, when the showcase cleaning device 80 performs a cleaning operation and the cleaning water flows into the drain port 20, the cleaning water flows into the storage unit 32 through the drain pipe 12 and is stored. The water level of the washing water in the storage unit 32 at this time is acquired by the water level measuring means 32a. Next, when the washing water is accumulated in the storage unit 32 and the water level exceeds a preset operating threshold value, the pumping control unit closes the on-off valve 54b to close it and opens the on-off valve 54a to open it. To do. It is preferable that the pumping control unit performs the pumping operation even when the water level of the storage unit 32 does not exceed the operation threshold value when the preset standby time elapses. In this configuration, since the pumping operation is performed periodically, it is possible to prevent long-term retention of water in the storage unit 32. Further, even if a problem occurs in the water level measuring means 32a, it is possible to prevent water leakage or the like due to full water. The pumping mechanism 70 may be operated at a preset date and time or a predetermined time interval by a timer or the like without using the water level measuring means 32a.

Next, the pumping control unit operates the air pumping unit 50. As a result, the compressed air is sent out to the supply port 42a of the air suction supply unit 40 through the compressed air pipe 48a. The compressed air delivered to the supply port 42a is throttled by the narrow portion 44 and injected at high speed into the downstream diffuser portion 46. Then, a negative pressure is generated during this high-speed injection. This negative pressure sucks the inside of the pumping pipe 34 via the suction pipe 48b connected to the suction port 42b and the air separation portion 36. At this time, since the upper backflow prevention member 30b closes the drain drainage pipe 14 side, the pumping pipe 34 sucks the storage portion 32 side. Further, the air injected into the diffuser unit 46 is sent to the pressure adjusting means 52 through the exhaust port 42c and the air supply pipe 48c, and after being adjusted to a predetermined pressure by the pressure adjusting means 52, the storage unit is passed through the air supply pipe 48d. It is pumped to 32. At this time, since the lower backflow prevention member 30a closes the drain pipe 12 side, the air from the air supply pipe 48d pressurizes the inside of the storage portion 32. As a result, the inside of the storage unit 32 is pressurized by the air from the air supply pipe 48d, and the pumping pipe 34 is depressurized by the suction operation from the suction pipe 48b side, and these so-called push-pull operations enter the storage unit 32. The stored wash water is pumped by the pumping pipe 34. The pumped wash water does not pass through the air separation unit 36 but is sent to the drain drain pipe 14 through the upper backflow prevention member 30b. Then, it is discharged to the drainage facility 16 through the drain drainage pipe 14. Further, the air caught in the pumping pipe 34 passes through the air separation unit 36, is sucked by the air supply pipe 48c, and then is sent to the air suction supply unit 40.

Here, since the pumping mechanism 70 suitable for the present invention pumps water by the push-pull method of pressurization by air and suction as described above, it is possible to pump water to a high place even at extremely low pressure. For example, in an experiment using a pumping pipe 34 having an inner shape of 25 mm, it was possible to pump water having a height of 8 m with a discharge pressure of 0.1 MPa of the pressure adjusting means 52.

Then, when the above pumping operation is performed for a preset time, for example, the pumping control unit stops the air pumping unit 50, closes the on-off valve 54a, and opens the on-off valve 54b. As a result, the air supply to the storage unit 32 and the air suction from the pumping pipe 34 are stopped, and the inside of the storage unit 32 becomes normal pressure by opening the on-off valve 54b. As a result, the pumping mechanism 70 stops the pumping operation and goes into a standby state.

Further, when a plurality of showcases 10 exist and storage units 32 are provided in each, the compressed air pipe 48a is branched and each of them is provided with a flow path switching means such as an on-off valve 54a, and the pumping control unit switches the flow path. The air pumping unit 50 may be shared by a plurality of pumping mechanisms 70 by opening and closing the means as appropriate.

As described above, the showcase cleaning device 80 according to the present invention includes a cleaning nozzle 60 that sprinkles cleaning water in the lower space A. Therefore, the lower space A can be washed without moving the product S on the product display shelf 24. In particular, in a configuration in which the showcase cleaning device 80 is automatically cleaned by a timer, the operator can clean the lower space A without any operation. Further, the showcase cleaning device 80 according to the present invention sprinkles cleaning water in order from the cleaning nozzle 60 located at a position far from the drain port 20. Therefore, the dust and the like in the drainage ditch 26 are sequentially swept toward the drainage port 20, and even relatively heavy dust can be discharged from the drainage port 20. In addition, the load on the water supply facility and the drainage facility can be kept low without requiring a large amount of washing water at one time.

Further, in the showcase cleaning device 80 provided with the pumping mechanism 70, the pumping mechanism 70 pumps the cleaning water and the drain water and discharges them to the drainage facility 16 through above the ceiling or the like. Therefore, large-scale construction such as excavating under the floor is not required to construct the drainage route and the like, and the showcase 10 can be easily moved and the layout can be changed.

Further, the pumping mechanism 70 of the present invention pumps water by a push-pull method of pressurization with air and suction. Therefore, it is possible to pump water to a high place with relatively little energy. Further, since pumping is performed using air, it is not necessary to use a direct water feeding means such as a pump, and water does not flow down to a drive facility such as an air compressor. Therefore, the load of the maintenance work of the drive system can be greatly reduced.

Further, in the pumping mechanism 70 of the present invention, by using a vacuum generator for the air suction supply unit 40, it is possible to configure the pressurization and suction by air with one compact member. As a result, the device configuration can be simplified and downsized.

Since the configuration, mechanism, shape, dimensions, operation, piping route, etc. of each part of the showcase cleaning device 80, the pumping mechanism 70, the cleaning nozzle 60, etc. shown in this example are examples, the present invention is particularly limited to this example. However, the present invention can be modified and implemented without departing from the gist of the present invention.

10 showcase
20 drain
60 cleaning nozzle
60b sprinkler hole
62 Water supply pipe
64 Opening and closing means
66 Control unit
70 Pumping mechanism
80 Showcase cleaning device
A lower space

The present invention
(1) A cleaning device for a showcase 10 having a lower space A provided with a drain port 20.
A plurality of cleaning nozzles 60 provided along the longitudinal direction of the lower space A, and
A water supply pipe 62 that supplies cleaning water to the cleaning nozzle 60,
An opening / closing means 64 for turning on / off the supply of cleaning water to the cleaning nozzle 60, and
It has a control unit 66 that controls the opening / closing means 64, and
The control unit 66 sprinkles and stops the cleaning water into the lower space A in order from the cleaning nozzle 60 far from the drain port 20 .
Further having a pumping mechanism 70 for pumping the washing water discharged from the drain port 20 to the drain drain pipe 14 provided above.
The pumping mechanism 70
It was connected to the drain pipe 12 connected to the drain port 20 and connected to the drain pipe 12 via the lower backflow prevention member 30a to prevent the backflow of the washing water to the showcase 10 side and the lower backflow prevention member 30a. A storage section 32, a pumping pipe 34 connected to the storage section 32 and extending upward, an air separating section 36 installed above the pumping pipe 34 to separate air in the pumping pipe 34, and the pumping pipe 34. The upper backflow prevention member 30b, which is provided between the drainage pipe 14 and the drainage pipe 14 to prevent backflow of the washing water to the storage portion 32 side, and the air separation portion 36 suck the air in the pumping pipe 34. It has an air suction supply unit 40 that pumps air to the storage unit 32.
The air suction supply unit 40 is a showcase characterized in that the washing water stored in the storage unit 32 is pumped through the pumping pipe 34 by sucking air from the pumping pipe 34 and pumping air to the storage unit 32. The above problem is solved by providing the cleaning device 80.
(2) The cleaning nozzle 60 is rotatably formed and has a substantially S-shape or a substantially crank shape having sprinkler holes 60b at both ends, and the cleaning nozzle 60 is rotated by ejecting cleaning water from the sprinkling holes 60b. The above problem is solved by providing the showcase cleaning device 80 according to the above (1).
(3) The pumping mechanism 70 further includes an air pumping unit 50 that sends compressed air to the air suction supply unit 40.
The air suction supply unit 40 is provided with a narrow portion 44 inside, and a vacuum is generated in which compressed air from the air pumping portion 50 sucks air from the air separation portion 36 due to a negative pressure when it passes through the narrow portion 44. The above problem is solved by providing the showcase cleaning device 80 according to the above (1) or (2), which is an apparatus.

It is a figure explaining the cleaning part of the showcase cleaning apparatus which concerns on this invention. It is a figure explaining the showcase cleaning apparatus which concerns on this invention provided with a pumping mechanism. It is a schematic sectional drawing of the air suction supply part of the pumping mechanism which concerns on this invention.

Next, the pumping mechanism 70 of the showcase cleaning device 80 according to the present invention will be described with reference to FIG. Although the pumping and drainage of the washing water sprinkled by the showcase washing device 80 will be mainly described here, the pumping mechanism 70 performs the same operation for other drain waters.

Here, since the pumping mechanism 70 of the present invention pumps water by the push-pull method of pressurization by air and suction as described above, it is possible to pump water to a high place even at extremely low pressure. For example, in an experiment using a pumping pipe 34 having an inner shape of 25 mm, it was possible to pump water having a height of 8 m with a discharge pressure of 0.1 MPa of the pressure adjusting means 52.

Further, in the showcase cleaning device 80 according to the present invention , the pumping mechanism 70 pumps the cleaning water and the drain water and discharges them to the drainage facility 16 through above the ceiling or the like. Therefore, large-scale construction such as excavating under the floor is not required to construct the drainage route and the like, and the showcase 10 can be easily moved and the layout can be changed.

Claims (4)

A showcase cleaning device with a lower space with a drain
A plurality of cleaning nozzles provided along the longitudinal direction of the lower space, and
A water supply pipe that supplies cleaning water to the cleaning nozzle,
An opening / closing means for turning on / off the supply of cleaning water to the cleaning nozzle,
It has a control unit that controls the opening / closing means.
The control unit is a showcase cleaning device characterized in that the cleaning water is sprinkled and stopped in the lower space in order from a cleaning nozzle far from the drain port. The cleaning nozzle is rotatably formed and has a substantially S-shape or a substantially crank shape with sprinkler holes on both ends.
The showcase cleaning device according to claim 1, wherein the cleaning nozzle is rotated by ejecting cleaning water from the sprinkler hole. It also has a pumping mechanism that pumps the washing water discharged from the drain port to the drain drain pipe provided above.
The pumping mechanism
A lower backflow prevention member that is connected to the drain pipe connected to the drainage port to prevent backflow of wash water to the showcase side.
A storage unit connected to the drain pipe via the lower backflow prevention member,
The pumping pipe connected to the storage section and extended upward,
An air separation unit installed above the pumping pipe to separate the air in the pumping pipe,
An upper backflow prevention member provided between the pumping pipe and the drain drainage pipe to prevent backflow of the washing water to the storage portion side.
It has an air suction supply unit that sucks air in the pumping pipe from the air separation unit and pumps air to the storage unit.
Claim 1 or claim 2 is characterized in that the air suction supply unit pumps the washing water stored in the storage unit through the pumping pipe by sucking air from the pumping pipe and pumping air to the storage unit. Showcase cleaning device described in. The pumping mechanism further has an air pumping unit that sends compressed air to the air suction supply unit.
The air suction supply unit is provided with a narrow portion inside, and is a vacuum generator that sucks air from the air separation portion by the negative pressure when the compressed air from the air pumping portion passes through the narrow portion. The showcase cleaning device according to claim 3.

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