JP6993219B2 - Cooling system - Google Patents

Description

The present invention relates to a cooling device provided with a cleaning structure for cleaning the cooling chamber.

In a cooling device that rapidly cools foodstuffs by blowing cold air onto the foodstuffs immediately after cooking stored in the cooling chamber, fragments of the foodstuffs may be blown off by the cold air and adhere to the wall surface of the cooling chamber. .. It is known, for example, that the cleaning structure for removing the fragments and the like is mounted on the cooling device, which is disclosed in Patent Document 1 previously proposed by the present applicant. The cleaning structure there is a plurality of cleaning devices that inject cleaning water into the cooling chamber, a water storage tank that collects the cleaning water injected from each cleaning device, and the cleaning water is supplied from the same tank to each cleaning device. It is composed of a feed path and a feed pump for the purpose.

Japanese Unexamined Patent Publication No. 2017-26263

By arranging a plurality of washing devices in the cooling chamber as in the cooling device of Patent Document 1, the cooling chamber can be washed evenly. However, in order to inject a sufficient amount of washing water from all the washing machines at the same time, a large amount of washing water and a high-power feed pump are required. Increasing the output of the feed pump causes disadvantages such as an increase in the size of the cleaning structure and an increase in cost.

An object of the present invention is to reduce the amount of cleaning water used, and to reduce the size and cost of the cleaning structure without impairing the advantages of the conventional cooling device capable of cleaning the cooling chamber evenly. It is in.

The cooling device according to the present invention includes a cooler unit 5 for cooling the cooling chamber 4 in the cooling mode and a cleaning structure for cleaning the cooling chamber 4 in the cleaning mode. The cooler unit 5 includes a unit case 15 arranged in the cooling chamber 4, a cooler 16 housed in the unit case 15, and a circulation fan 17. The cleaning structure includes at least one washer 23 and 24 installed on the wall surface of the cooling chamber 4, at least one washer 25 having an injection port inside the cooler unit 5, and each washer 23 to 25. It is provided with a water storage tank 26 for collecting the washing water jetted from the water storage tank 26, and a feeding path 27 and a feeding pump 28 for feeding the washing water from the water storage tank 26 to the washing devices 23 to 25. The supply path 27 includes one main path 47 extending from the water storage tank 26, a plurality of branch paths 48 to 50 branching from the main path 47 and connected to the respective washers 23 to 25, and each branch path 48. It is provided with control valves 51 to 54 for opening and closing ~ 50. The cleaning mode includes a cleaning step of injecting cleaning water from each cleaning device 23 to 25, and in the cleaning step, each branch path 48 to 50 is sequentially opened one by one by switching the control valves 51 to 54, and each cleaning is performed. Washing water is sequentially supplied to the vessels 23 to 25 . A predetermined waiting time T0 for stopping the feed pump 28 is set between the closing of the branch road 48 to 50 being opened and the next opening of another branch road 48 to 50, and the feed is fed. At the same time as the feed pump 28 is stopped, the open branch paths 48 to 50 are closed by the control valves 51 to 54, and at the same time when the standby time T0 elapses and the feed pump 28 is driven, another branch path is started. The control valves 51 to 54 of 48 to 50 are opened .

Another cooling device according to the present invention includes a cooler unit 5 for cooling the cooling chamber 4 in the cooling mode and a cleaning structure for cleaning the cooling chamber 4 in the cleaning mode. The cooler unit 5 includes a unit case 15 arranged in the cooling chamber 4, a cooler 16 housed in the unit case 15, and a circulation fan 17. The cleaning structure includes at least one washer 23 and 24 installed on the wall surface of the cooling chamber 4, at least one washer 25 having an injection port inside the cooler unit 5, and each washer 23 to 25. It is provided with a water storage tank 26 for collecting the washing water jetted from the water storage tank 26, and a feeding path 27 and a feeding pump 28 for feeding the washing water from the water storage tank 26 to the washing devices 23 to 25. The supply path 27 includes one main path 47 extending from the water storage tank 26, a plurality of branch paths 48 to 50 branching from the main path 47 and connected to the respective washers 23 to 25, and each branch path 48. It is provided with control valves 51 to 54 for opening and closing ~ 50. The cleaning mode includes a cleaning step of spraying cleaning water from each cleaning device 23 to 25. In the cleaning process, a plurality of cleaning device groups are set, and when the number of cleaning devices 23 to 25 provided in the cleaning structure is N, each cleaning device group is composed of N-1 or less cleaning devices 23 to 25. ing. By switching the control valves 51 to 54, the branch paths 48 to 50 are opened and closed, and the washing water is sequentially supplied to each washing device group . A predetermined waiting time T0 for stopping the feed pump 28 is set between the closing of the branch road 48 to 50 being opened and the next opening of another branch road 48 to 50, and the feed is fed. At the same time as the feed pump 28 is stopped, the open branch paths 48 to 50 are closed by the control valves 51 to 54, and at the same time when the standby time T0 elapses and the feed pump 28 is driven, another branch path is started. The control valves 51 to 54 of 48 to 50 are opened .

The washing mode includes at least one rinsing step performed after the washing step, and the washing water can be sequentially supplied to each of the washing machines 23 to 25 or each washing device group also in the washing step.

The cleaning structure of the cooling device according to the present invention includes at least one cleaning device 23 and 24 installed on the wall surface of the cooling chamber 4, and at least one cleaning device 25 having an injection port inside the cooler unit 5. To prepare for. Therefore, as with the conventional cooling device, the entire cooling chamber 4 such as the wall surface of the cooling chamber 4, the inner and outer surfaces of the unit case 15, and the surfaces of the cooler 16 and the circulation fan 17 can be cleaned evenly. ..

Then, in the present invention, the washing water supply path 27 to each washing device 23 to 25 is connected to each washing device 23 to 25 by branching from one main path 47 extending from the water storage tank 26 and the main path 47. A plurality of branch paths 48 to 50 and control valves 51 to 54 for opening and closing each branch path 48 to 50 are provided, and each branch path 48 to 50 is switched by switching the control valves 51 to 54 in the cleaning process. Are sequentially opened one by one so that the washing water is sequentially supplied to each of the washing machines 23 to 25. In other words, the washing water is sequentially jetted from each of the washing devices 23 to 25. According to this, the amount of circulating water for washing water can be reduced and the amount used can be reduced as compared with the conventional cooling device in which washing water is jetted from all the washing machines at the same time. Further, by reducing the amount of circulating water of the washing water, it is possible to reduce the output of the feeding pump 28 for feeding the washing water, that is, to reduce the size and cost of the washing structure.

In another invention, a plurality of washing device groups are set in the washing step. When the number of cleaning devices 23 to 25 provided in the cleaning structure is N, each cleaning device group is composed of N-1 or less cleaning devices 23 to 25. Then, the branch paths 48 to 50 are opened and closed by switching the control valves 51 to 54, so that the washing water is sequentially supplied to each washing device group. That is, the washing water is sequentially jetted from the washing devices 23 to 25 having N-1 or less. This also makes it possible to reduce the amount of circulating water in the washing water and reduce the amount of water used, as compared with the conventional cooling device in which the washing water is sprayed from all the washing machines at the same time. Further, by reducing the amount of circulating water of the washing water, it is possible to reduce the output of the feeding pump 28 for feeding the washing water, that is, to reduce the size and cost of the washing structure.

In the present invention, the washing water sprayed from each of the washing devices 23 to 25 is collected in the water storage tank 26, but at that time, the washing water does not smoothly flow into the water storage tank 26, and the washing water in the water storage tank 26 is discharged. There may be a shortage. Therefore, in the present invention, a predetermined standby time T0 for stopping the feed pump 28 is set between the time when the branch road 48 to 50 being opened is closed and the time when another branch road 48 to 50 is opened next time. did. That is, in the washing step, a time is provided to temporarily stop the injection of the washing water. As a result, it is possible to secure a sufficient time for the washing water to flow into the water storage tank 26 and solve the problem that the washing water in the tank 26 is insufficient.

In the rinsing step performed after the washing step, if the washing water is sequentially supplied to each washing device 23 to 25 or each washing device group, the amount of circulating water in the washing water in the same step is reduced, and the entire washing mode is performed. The amount of wash water used in the water can be further reduced. In the rinsing process, it is possible to supply the washing water to all the washing machines 23 to 25 at the same time, but in that case, the amount of washing water sent to each washing machine 23 to 25 or There is a risk of insufficient water pressure. Therefore, in the present invention, the washing water is sequentially supplied to each of the washing machines 23 to 25 so that the amount of water and the water pressure are not insufficient.

It is explanatory drawing which shows the schematic structure of the cleaning structure of the cooling apparatus which concerns on this invention. It is a front view of the cooling device which opened the door. It is a cross-sectional plan view of a cooling device. It is a timing chart which shows the transition of the drive state of a feed pump and the open / closed state of each valve in a cleaning process. It is a figure which shows the modification of the feed path of a washing water.

(Examples) FIGS. 1 to 4 show examples in which the present invention is applied to a rapid cooling cabinet (blast chiller) which is a kind of cooling device. The front / rear, left / right, and up / down in this embodiment follow the crossing arrows shown in FIG. 2 and the front / back, left / right, and up / down indications shown in the vicinity of each arrow. In FIG. 2, the rapid cooling cabinet includes a heat insulating box 1 having an opening on the front surface (front surface), a door 2 that swings open and closes the opening of the heat insulating box 1, and a chassis 3 that supports the heat insulating box 1. A cooler unit 5 for cooling the cooling chamber 4 is arranged on the left side of the cooling chamber 4 surrounded by the heat insulating box 1 and the door 2, and a hotel pan (tray) on which ingredients (cooling targets) are placed on the right side thereof. ) Is formed. The hotel pan loaded in the accommodation space is supported in a multi-tiered manner by a pair of left and right tray receivers 6 provided on the right outer surface of the cooler unit 5 and the right wall surface of the cooling chamber 4, respectively.

Inside the chassis 3, a machine room 7 including an upper machine room 7a and a lower machine room 7b is defined. An operation panel 8 is arranged in front of the upper machine room 7a, and a control device 9 for controlling the entire rapid cooling chamber is housed behind the operation panel 8 (see FIG. 1). In the lower machine room 7b, a refrigerating device 10 composed of a compressor, a condenser and the like is housed. The outer box 11 installed on the top surface of the heat insulating box 1 houses a ventilation device (not shown) for ventilating the cooling chamber 4.

The cooler unit 5 is configured by accommodating a cooler 16 and a pair of upper and lower circulation fans 17 inside a box-shaped unit case 15. The cooler 16 is connected to a compressor and a condenser in the lower machine room 7b by a refrigerant pipe, and is cooled by receiving a low-temperature low-pressure refrigerant liquid from the condenser via an expansion portion. As shown in FIG. 3, a heater 18 for melting and removing frost when it adheres is attached to one surface of the cooler 16. The circulation fan 17 is an axial fan and forms an air flow from right to left inside the unit case 15. A pair of upper and lower suction ports 19 facing the circulation fan 17 are formed on the right wall of the unit case 15. The left surface of the unit case 15 is open, and this opening constitutes the air outlet 20. A gap for ventilation is formed between the left wall surface of the cooling chamber 4 and the air outlet 20.

When the user operates the operation panel 8 to instruct the start of the cooling mode, the control device 9 activates the refrigerating device 10 and the circulation fan 17 on condition that the door 2 is closed. The air sucked into the unit case 15 from the suction port 19 by the blowing action of the circulation fan 17 is cooled by passing through the cooler 16 and blown out from the air outlet 20. This cold air is divided into front and back, flows to the right along the front and rear wall surfaces of the cooling chamber 4, reverses when it reaches the right wall surface of the cooling chamber 4, cools across the hotel pan, and then sucks in again 19 Is sucked into.

When the cooling mode is executed, fragments of foodstuffs and the like may be blown off by cold air and adhere to the wall surface of the cooling chamber 4, the cooler unit 5, and the like. In order to periodically remove the fragments and the like, the rapid cooling chamber according to the present embodiment is equipped with a cleaning structure for cleaning the cooling chamber 4. In FIG. 1, the cleaning structure consists of a pair of left and right rotary cleaning nozzles (cleaners) 23 and 24 installed on the upper wall surface of the cooling chamber 4, and a cleaning pipe (cleaning device) having an injection port inside the cooler unit 5. ) 25, a water storage tank 26 for storing the washing water, and a feeding path 27 and a feeding pump 28 for feeding the washing water from the tank 26 to the washing nozzles 23 and 24 and the washing pipe 25. ..

The water storage tank 26 is housed in the upper machine room 7a below the cooling room 4 together with the feed pump 28. The water storage tank 26 is provided with a water level sensor 31, and a drainage channel 32 and an overflow channel 33 are connected to each other. A drainage valve 34 is arranged in the drainage channel 32, and the overflow path 33 joins the drainage channel 32 on the downstream side of the drainage valve 34. The washing water is supplied to the water storage tank 26 from the water supply port 35 provided at the corner of the upper wall of the cooling chamber 4 through the water collecting port 36 provided at the bottom wall of the cooling chamber 4. The water supply port 35 is connected to a water pipe via a water supply channel 37, and when the water supply valve 38 arranged in the water supply channel 37 is opened, tap water as washing water flows from the water supply port 35 through the water collection port 36 to a water storage tank. It flows into 26. This water supply is performed with the drain valve 34 closed, and continues until the water level sensor 31 detects full water. Even if a detection abnormality occurs in the water level sensor 31, the washing water exceeding the full water level is drained through the overflow passage 33, so that the washing water does not overflow from the water storage tank 26.

The cleaning pipe 25 is composed of one main pipe 43 extending downward from the upper wall of the cooling chamber 4 and four branch pipes 44 branching from the main pipe 43 and extending rearward. Each branch pipe 44 is arranged in the center of the left and right inside the unit case 15 (see FIG. 3), and includes a plurality of injection ports facing each of the cooler 16 and the circulation fan 17. The washing water jetted from the injection port of each branch pipe 44 mainly cleans the surfaces of the cooler 16 and the circulation fan 17 and the inner surface of the unit case 15. On the other hand, the cleaning water sprayed from the cleaning nozzles 23 and 24 mainly cleans the wall surface of the cooling chamber 4 and the outer surface of the unit case 15.

In FIG. 1, the washing water supply path 27 is arranged in one main path 47 extending from the water storage tank 26, three branch paths 48 to 50 branching from the main path 47, and each branch path 48 to 50. It is composed of on-off valves (control valves) 51 to 53. The first branch path 48 is connected to the first cleaning nozzle 23, the second branch path 49 is connected to the second cleaning nozzle 24, and the third branch path 50 is connected to the cleaning pipe 25.

When the user operates the operation panel 8 to instruct the start of the cleaning mode, the control device 9 starts the operation in the cleaning mode on condition that the door 2 is closed. The cleaning mode in this embodiment is composed of four steps: a cleaning step, a pre-rinsing step, a post-rinsing step, and a drying step. The timing chart of FIG. 4 shows the driving state of the feed pump 28 in the first cleaning step and the open / closed state of the water supply valve 38, the on-off valves 51 to 53, and the drain valve 34. First, the control device 9 opens the water supply valve 38 to start supplying wash water (tap water) to the water storage tank 26 (time point t1), and when the water level sensor 31 of the water storage tank 26 detects full water, the control device 9 opens the water supply valve 38. Close and end the water supply (time point t2). It is preferable that the user puts the detergent into the bottom of the cooling chamber 4 or the like before instructing the start of the cleaning mode. As a result, the washing water containing the detergent, which is a mixture of the tap water supplied from the water supply port 35 and the detergent, can be supplied to the water storage tank 26.

When the supply of cleaning water is completed, the control device 9 sequentially opens the three on-off valves 51 to 53, and alternately performs cleaning by the first cleaning nozzle 23, cleaning by the second cleaning nozzle 24, and cleaning by the cleaning pipe 25. To carry out. Specifically, when a predetermined standby time T0 (for example, 30 seconds) elapses after the water supply valve 38 is closed, the control device 9 starts the feeding pump 28 and is arranged in the first branch path 48. 1 Open the on-off valve 51 (time point t3). As a result, the washing water is supplied from the water storage tank 26 to the first washing nozzle 23, and the washing water is sprayed from the nozzle 23. The washing water sprayed from the first washing nozzle 23 is collected in the water storage tank 26 from the water collecting port 36 after cleaning the wall surface of the cooling chamber 4 and the outer surface of the unit case 15, and is used for cleaning again.

When a predetermined feeding time T1 (for example, 6 minutes and 30 seconds) has elapsed after opening the first on-off valve 51, the control device 9 stops the feeding pump 28 and closes the on-off valve 51 (time point t4). Further, when the standby time T0 elapses, the control device 9 restarts the feed pump 28 and opens the second on-off valve 52 arranged in the second branch path 49 (time point t5). As a result, the washing water is supplied from the water storage tank 26 to the second washing nozzle 24, and the washing water is sprayed from the nozzle 24. The washing water sprayed from the second washing nozzle 24 is collected in the water storage tank 26 from the water collecting port 36 after cleaning the wall surface of the cooling chamber 4 and the outer surface of the unit case 15, and is used for cleaning again.

When the feeding time T1 elapses after opening the second on-off valve 52, the control device 9 stops the feeding pump 28 and closes the on-off valve 52 (time point t6). Further, when the standby time T0 elapses, the control device 9 restarts the feed pump 28 and opens the third on-off valve 53 arranged in the third branch path 50 (time point t5). As a result, the washing water is supplied from the water storage tank 26 to the washing pipe 25, and the washing water is jetted from each branch pipe 44 constituting the pipe 25. The washing water jetted from each branch pipe 44 is collected in the water storage tank 26 from the water collecting port 36 after cleaning the surface of the cooler 16 and the circulation fan 17 and the inner surface of the unit case 15, and is used for cleaning again. ..

When the feeding time T1 elapses after opening the third on-off valve 53, the control device 9 stops the feeding pump 28, closes the on-off valve 53 (time point t8), and waits until the waiting time T0 elapses (time point t8). Time point t9). The above time points t3 to time point t9 are set as one set, and thereafter, this is repeated until a predetermined washing time (for example, 50 minutes) elapses. The time counting of the washing time is started at t3 when the washing water is first sprayed. When the cleaning time elapses, the control device 9 starts the end processing of the cleaning process (time point t10). Specifically, the drain valve 34 arranged in the drainage channel 32 is opened to start draining the washing water from the water storage tank 26, and if the feed pump 28 is being driven, the drain valve 28 is stopped, and further. The on-off valve that is open (the third on-off valve 53 in the example of FIG. 4) is closed. When the drainage from the water storage tank 26 is completed, the drain valve 34 is closed (time point t11), and the process proceeds to the next pre-rinsing step. The completion of drainage of the wash water can be detected by, for example, a flow rate sensor arranged in the drainage channel 32. When draining the washing water, all the on-off valves 51 to 53 may be opened for the purpose of draining the washing devices 23 to 25 and the feeding path 27.

The waiting time T0 was set as described above between the closing of the branch road 48 to 50 being opened and the next opening of another branch road 48 to 50 at the bottom of the cooling chamber 4. This is to secure sufficient time for the washing water to flow into the water storage tank 26 when the washing water stays, and in addition, fragments of foodstuffs and the like that have fallen to the bottom of the cooling chamber 4 are collected in the water collecting port 36. This is to push it away. Since the cleaning water is not sprayed from the cleaning nozzles 23 and 24 and the cleaning pipe 25 during the standby time T0, the water level of the cleaning water accumulated at the bottom of the cooling chamber 4 gradually decreases, and eventually all the accumulated water is collected at the collection port 36. Is sucked into. At this time, the stagnant water exerts an action of flushing fragments of foodstuffs and the like to the water collecting port 36. Further, in the cleaning step, the heater 18 can be energized, thereby raising the temperature of the cooling chamber 4 and enhancing the cleaning effect particularly against oil stains. In this case, for example, the heater 18 may be turned on and off at the same timing as the feed pump 28.

Since the control method of the feed pump 28 and the valves 38.51 to 53.34 in the next pre-rinse step and the post-rinse step is exactly the same as the above-mentioned cleaning step, the description thereof will be omitted. Regardless of the on-off valves 51 to 53 that were opened last in the cleaning step, the first on-off valve 51 is opened first in the pre-rinsing step. The same applies to the post-rinse process. Since no detergent is added in advance in each rinsing process, the washing water in the same process is tap water.

In the final drying step, the control device 9 energizes the heater 18 and drives the circulation fan 17, and at the same time drives the ventilation device in the outer box 11, so that the outside air has a lower humidity than the air in the cooling chamber 4 after cleaning. To promote the evaporation of wash water. After the predetermined drying time has elapsed, the control device 9 stops the heater 18, the circulation fan 17, and the ventilation device to end the drying step, that is, the cleaning mode.

As described above, the cleaning structure of the rapid cooling cabinet according to the present embodiment includes a pair of cleaning nozzles 23 and 24 installed on the upper wall surface of the cooling chamber 4, and a cleaning pipe having an injection port inside the cooler unit 5. 25 and. Therefore, the entire cooling chamber 4, such as the wall surface of the cooling chamber 4, the inner and outer surfaces of the unit case 15, and the surfaces of the cooler 16 and the circulation fan 17, can be cleaned evenly. Further, in this embodiment, the washing water supply path 27 has one main path 47 extending from the water storage tank 26, three branch paths 48 to 50 branching from the main path 47, and each branch path 48 to 50. Each branch path 48 to 50 is sequentially opened one by one by switching the on-off valves 51 to 53 in the cleaning process, and the cleaning nozzles 23 and 24 and the cleaning pipe 25 are provided. The wash water was sent in sequence. According to this, the amount of circulating water for washing water can be reduced and the amount used can be reduced as compared with the conventional cooling device in which washing water is jetted from all the washing machines at the same time. Further, by reducing the amount of circulating water of the washing water, it is possible to reduce the output of the feeding pump 28 for feeding the washing water, that is, to reduce the size and cost of the washing structure.

In the above embodiment, the three branch paths 48 to 50 are configured to be opened and closed by the three on-off valves 51 to 53, but the present invention is not limited to this, and for example, one as shown in FIG. It is also possible to open and close the three branch paths 48 to 50 with the on-off valve 51 and one three-way valve 54. When the three-way valve 54 is switched to the state (a), the second branch path 49 can be opened and the third branch path 50 can be closed, and when the three-way valve 54 is switched to the state (b), conversely, the second branch path 49 is closed. The second branch road 49 can be closed and the third branch road 50 can be opened. Further, when the three-way valve 54 is switched to the state of (c), both branch paths 49 and 50 can be closed.

Further, in the above embodiment, the washing water is sequentially jetted from one of the three washing devices 23 to 25, but the washing water may be sprayed from two at the same time. can. For example, first, the first branch path 48 and the second branch path 49 are opened at the same time to inject cleaning water from the two cleaning nozzles 23 and 24, and then only the third branch path 50 is opened for cleaning. Washing water is sprayed from the pipe 25, and this is repeated thereafter. The group of washers 23 to 25 on which wash water is sprayed at the same time is called a washer group. In this example, the two wash nozzles 23 and 24 form the first washer group, and the wash pipe 25 is the second. Consists of a group of washers.

As another example, for example, first, the first branch road 48 and the second branch road 49 are opened at the same time, then the second branch road 49 and the third branch road 50 are opened at the same time, and then the first branch road 48 and the like. The third branch road 50 can be opened at the same time, and this can be repeated thereafter. In this case, the two cleaning nozzles 23 and 24 form the first cleaning device group, the second cleaning nozzle 24 and the cleaning pipe 25 form the second cleaning device group, and the first cleaning nozzle 23 and cleaning are performed. The pipe 25 constitutes a third group of washers. As described above, the cleaning device group to which each cleaning device 23 to 25 belongs is not limited to one, and each cleaning device 23 to 25 may belong to a plurality of cleaning device groups. Even when the washing water is sequentially supplied to each washing device group, the amount of circulating water used is smaller than that of the conventional cooling device in which the washing water is sprayed from all the washing machines at the same time. Can be reduced. Further, by reducing the amount of circulating water of the washing water, it is possible to reduce the output of the feeding pump 28 for feeding the washing water, that is, to reduce the size and cost of the washing structure.

In the above embodiment, two washers 23 and 24 are installed on the upper wall surface of the cooling chamber 4, but the number may be one or three or more. It can be installed on a wall surface other than the upper wall surface, and its form is not limited to the rotary cleaning nozzle. The number and form of the washer 25 inside the cooler unit 5 is not limited to that shown in the above embodiment. The feeding time T1 for feeding the washing water to the washing machines 23 to 25 can be different for each washing device 23 to 25. The number of rinsing steps can be arbitrarily selected.

4 Cooling chamber 5 Cooler unit 15 Unit case 16 Cooler 17 Circulation fan 23 Washer (1st washing nozzle)
24 Washer (second wash nozzle)
25 Washer (washing pipe)
26 Water storage tank 27 Feed route 28 Feed pump 47 Main route 48 Branch route (first branch route)
49 branch road (second branch road)
50 branch road (third branch road)
51 Control valve (first on-off valve)
52 Control valve (second on-off valve)
53 Control valve (third on-off valve)
54 Control valve (three-way valve)

Claims (3)

A cooling device including a cooler unit (5) for cooling the cooling chamber (4) in the cooling mode and a cleaning structure for cleaning the cooling chamber (4) in the cleaning mode.
The cooler unit (5) includes a unit case (15) arranged in the cooling chamber (4), and a cooler (16) and a circulation fan (17) housed in the unit case (15). ,
The cleaning structure includes at least one washer (23.24) installed on the wall surface of the cooling chamber (4) and at least one washer (25) having an injection port inside the cooler unit (5). And a water storage tank (26) for collecting the washing water sprayed from each washing device (23 to 25), and a sending for supplying washing water from the water storage tank (26) to each washing device (23 to 25). It is equipped with a feed channel (27) and a feed pump (28).
The supply path (27) has one main path (47) extending from the water storage tank (26) and a plurality of branches branching from the main path (47) and connected to each washer (23 to 25). It is equipped with a road (48 to 50) and a control valve (51 to 54) for opening and closing each branch road (48 to 50).
The cleaning mode includes a cleaning step of spraying cleaning water from each cleaning device (23 to 25).
In the cleaning process, each branch path (48 to 50) is sequentially opened one by one by switching the control valves (51 to 54), and cleaning water is sequentially supplied to each cleaning device (23 to 25) .
A predetermined waiting time (T0) for stopping the feed pump (28) between the closing of the branch road (48 to 50) being opened and the next opening of another branch road (48 to 50). ) Is set,
At the same time as the feed pump (28) is stopped, the branch path (48 to 50) that is open is closed by the control valve (51 to 54), and the standby time (T0) elapses before the feed pump (28). A cooling device, characterized in that the control valves (51 to 54) of another branch path (48 to 50) are opened at the same time when the pump is driven . A cooling device including a cooler unit (5) for cooling the cooling chamber (4) in the cooling mode and a cleaning structure for cleaning the cooling chamber (4) in the cleaning mode.
The cooler unit (5) includes a unit case (15) arranged in the cooling chamber (4), and a cooler (16) and a circulation fan (17) housed in the unit case (15). ,
The cleaning structure includes at least one washer (23.24) installed on the wall surface of the cooling chamber (4) and at least one washer (25) having an injection port inside the cooler unit (5). And a water storage tank (26) for collecting the washing water sprayed from each washing device (23 to 25), and a sending for supplying washing water from the water storage tank (26) to each washing device (23 to 25). It is equipped with a feed channel (27) and a feed pump (28).
The supply path (27) has one main path (47) extending from the water storage tank (26) and a plurality of branches branching from the main path (47) and connected to each washer (23 to 25). It is equipped with a road (48 to 50) and a control valve (51 to 54) for opening and closing each branch road (48 to 50).
The cleaning mode includes a cleaning step of spraying cleaning water from each cleaning device (23 to 25).
In the cleaning process, multiple cleaning device groups are set,
When the number of cleaning devices (23 to 25) provided in the cleaning structure is N, each cleaning device group is composed of (N-1) or less cleaning devices (23 to 25).
By switching the control valves (51 to 54), each branch path (48 to 50) is opened and closed, and washing water is sequentially supplied to each washing device group.
A predetermined waiting time (T0) for stopping the feed pump (28) between the closing of the branch road (48 to 50) being opened and the next opening of another branch road (48 to 50). ) Is set,
At the same time as the feed pump (28) is stopped, the branch path (48 to 50) that is open is closed by the control valve (51 to 54), and the standby time (T0) elapses before the feed pump (28). A cooling device, characterized in that the control valves (51 to 54) of another branch path (48 to 50) are opened at the same time when the pump is driven . The washing mode comprises at least one rinsing step following the washing step.
The cooling device according to claim 1 or 2, wherein cleaning water is sequentially supplied to each cleaning device (23 to 25) or each cleaning device group even in the rinsing step .

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