JP6481936B2 - Sprinkler - Google Patents

Description

  The present invention relates to a watering apparatus, and more particularly to an apparatus having a mat installed on the windward side of a heat exchanger of a refrigerator.

  2. Description of the Related Art Conventionally, a watering device is known in which water is dripped onto a mat installed in front of a heat exchanger of a refrigerator, thereby removing heat of vaporization when the water evaporates and reducing a condensation load. In this case, the watering is controlled so as to determine the ON / OFF cycle of the water supply valve according to the detected outside air temperature, and to increase the amount of water supply as the high outside air temperature is reached (for example, see Patent Document 1). . Watering is performed from the top of the mat, and the water is evaporated while flowing from top to bottom.

Japanese Patent Laid-Open No. 2004-3806

However, according to Patent Document 1, since the amount of water supply is determined only at the outside air temperature, even if there is water drained without evaporating partition, it is not managed, and water is supplied more than necessary and drains water. There is a problem.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a watering device that is supplied with water more than necessary and does not discharge water.

The present invention, by dropping water through a water supply valve to a watering mat installed on the windward of the heat exchanger of the refrigerator, deprives the heat of vaporization as the water evaporates from the air passing through the watering mat, In the watering device for reducing the condensation load, the outside air humidity sensor for detecting the outside air humidity Ho, the outside air temperature sensor for detecting the outside air temperature To, and the air passing through the watering mat installed on the wind of the heat exchanger. An air temperature sensor for detecting an air temperature Td, and a temperature difference Tdiff between an outside air temperature To detected by the outside air temperature sensor and an air temperature Td detected by the air temperature sensor and the outside air humidity sensor. based on the ambient humidity Ho, a control unit for opening and closing the water supply valve, wherein the control unit calculates a maximum temperature difference Tmax based and the outside air temperature to on the ambient humidity Ho, the temperature Tdiff is characterized in that to reduce the watering amount closer to the maximum temperature difference Tmax.

  According to the present invention, the water supply valve is opened and closed based on the temperature difference Tdiff between the outside air temperature To detected by the outside air temperature sensor and the air temperature Td detected by the air temperature sensor and the outside air humidity Ho detected by the outside air humidity sensor. Since the control part which performs is provided, the supply_amount | feed_rate of the water to a watering mat can be suppressed, and water saving becomes possible.

It is a circuit diagram which shows the watering apparatus which concerns on this Embodiment. It is a flowchart which shows the process sequence of a watering apparatus. It is a figure explaining the maximum temperature difference Tmax. AC is a figure explaining the wet state of a watering mat. It is a figure which shows the temperature transition of this system when watering is started from the state where the watering mat is dry. It is a figure which shows the temperature transition of this system when watering is started from the state where the watering mat is sufficiently wet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating the refrigerator 1 according to the present embodiment together with the refrigerant cycle 30.
A refrigerant cycle 30 shown in FIG. 1 includes a refrigerator 1, a showcase 100, and an inter-unit pipe 101 that connects these units. The refrigerator 1 includes a compressor 37, a condenser 31, and a blower 32. The showcase 100 incorporates an expansion valve 33 and an evaporator 35. 39 is a refrigerant pipe. On the windward side of the condenser 31, the watering mat 10 is attached by a fixture (not shown).

The watering mat 10 is installed in order to prevent the cooling water from splashing as it falls and flowing along with the air sucked by the blower 32. The properties of the material of the watering mat 10 are as follows. It is preferable that the air resistance is low and the heat exchange with the falling cooling water is smooth and durable.
As the watering mat that allows easy passage of air, for example, a nonwoven fabric fiber body is preferable. Moreover, it is preferable that the watering mat 10 uses what recycled waste plastic and reprocessed it into the fiber form from a viewpoint of effective utilization of resources. The shape of the watering mat 10 is desirably a shape that substantially covers the air suction surface of the condenser 31. The thickness may be about several centimeters depending on the material and shape. Moreover, the watering mat 10 can be easily installed by selecting a stretchable material.

A water supply pipe 51 is provided on the top of the watering mat 10. A drain pipe 52 through which the sprinkled water is discharged is connected to the lower part of the watering mat 10.
According to the present embodiment, the cooling water cools the air K passing toward the condenser 31 while flowing down the water spray mat 10 from the water supply pipe 51 and flowing down the water spray mat 10. The cooling water that has cooled the air K sucked into the condenser 31 flows down to the water storage tank 61 through the drain pipe 52. The cooling water in the water storage tank 61 is supplied again to the water supply pipe 51 by opening the water supply electromagnetic valve 58 through the circulation water distribution pipe 63 by the pump 62 and supplied to the upper part of the watering mat 10. The cooling water circulates while cooling the air K flowing into the condenser 31 in this way.
A header 51 </ b> A is provided at the tip of the water supply pipe 51. The header 51A sprays the cooling water evenly on the upper portion of the watering mat 10, and a plurality of watering holes are formed in the bottom of the header 51A, and the cooling water is dropped almost uniformly from the watering holes.

On the windward side of the watering mat 10, an outside air humidity sensor 12 that detects the humidity of the outside air and an outside air temperature sensor 13 that detects the temperature of the outside air are provided. Further, an air temperature sensor 15 is provided between the watering mat 10 and the condenser 31 to detect the temperature of the air passing through the watering mat 10, located below the watering mat 10.
The air temperature sensor 15 is connected to the refrigerator control board 53, and the outside air humidity sensor 12 and the outside air temperature sensor 13 are connected to the sensor unit 54. The outside air humidity sensor 12, the outside air temperature sensor 13, and the air temperature sensor 15 are connected to a water supply valve controller 55 through a communication line 57. Yes.

The humidity value of the outside air humidity sensor 12 and the temperature value of the outside air temperature sensor 13 are sent to the master controller 56 via the sensor unit 54, and the temperature value of the air temperature sensor 15 is sent to the master via the refrigerator control board 53. It is sent to the controller 56.
The master controller (control unit) 56 controls the water supply valve controller 55 as described later based on the humidity of the outside air humidity sensor 12, the temperature of the outside air temperature sensor 13, and the temperature of the air temperature sensor 15. The water supply valve controller 55 opens and closes the water supply electromagnetic valve 58. By opening and closing the water supply electromagnetic valve 58, tap water is cut off / passed through the header 51 </ b> A at the top of the watering mat 10, and watering through the watering mat 10 is performed.

FIG. 2 is a flowchart showing a procedure for water cutoff / water flow to the watering mat 10.
The state determination process shown in the flow of FIG. 2 is executed for each data measurement cycle, and the state of the watering mat 10 is determined and changed in real time.
First, when the valve control process is started (S70), the master controller 56 acquires the outside air temperature To of the outside air temperature sensor 13, the outside air humidity Ho of the outside air humidity sensor 12, and the air temperature Td of the air temperature sensor 15. (S71).
Next, the master controller 56 calculates the maximum temperature difference Tmax from the outside air temperature To and the outside air humidity Ho.
Further, a temperature difference Tdiff between the outside air temperature To detected by the outside air temperature sensor and the air temperature Td detected by the air temperature sensor is calculated (S72).

FIG. 3 is a diagram illustrating the temperature transition of this system and explaining the maximum temperature difference Tmax.
Assuming that sufficient water is supplied to the watering mat 10, even if water is supplied to the watering mat 10, the air temperature Td detected by the air temperature sensor 15 does not decrease. When this state is reached, the temperature difference between the outside air temperature To detected by the outside air temperature sensor 13 and the air temperature Td detected by the air temperature sensor 15 is defined as a maximum temperature difference Tmax, and the maximum temperature difference Tmax is Based on the wet air diagram, it is obtained from the outside air temperature To and the outside air humidity Ho.
In the present embodiment, the master controller 56 calculates the maximum temperature difference Tmax at that time in real time from the outside air temperature To and the outside air humidity Ho.
In FIG. 3, when the air temperature Td detected by the air temperature sensor 15 continues to decrease from the point A and approaches the point B, the outside air temperature To detected by the outside air temperature sensor and the air temperature Td detected by the air temperature sensor The temperature difference matches the maximum temperature difference Tmax.
In this state, even if water is supplied to the watering mat 10, the air temperature Td detected by the air temperature sensor 15 does not decrease.

In the present embodiment, as shown in FIG. 2, the water spray mat 10 is based on the maximum temperature difference Tmax calculated from the outside air temperature To and the outside air humidity Ho and the temperature difference Tdiff between the outside air temperature To and the air temperature Td. The amount of water spray to be supplied is determined (S73).
That is, as shown in FIG. 3, when the temperature difference Tdiff between the outside air temperature To and the air temperature Td approaches the maximum temperature difference Tmax, further water supply is wasted.
Therefore, the valve opening degree of the water supply electromagnetic valve 58 is reduced by the water supply valve controller 55 based on the determined watering amount, and the watering amount to the watering mat 10 is reduced. Of course, if the temperature difference Tdiff deviates from the maximum temperature difference Tmax, more water supply is required. Therefore, the watering amount is determined again, and the valve opening degree of the water supply electromagnetic valve 58 is determined based on this watering amount. It is adjusted (S74). In the left direction in FIG. 3, the watering amount is increased, and in the right direction in FIG. 3, the watering amount is decreased. Thereby, the valve control process is terminated (S75).
The maximum temperature difference Tmax is preferably calculated from the outside air temperature To and the outside air humidity Ho and stored in advance as a table.

FIG. 4 is a diagram illustrating a state when water cutoff / water flow is performed on the watering mat 10 based on the wet / thirsty state of the watering mat 10.
FIG. 4A shows a state where the watering mat 10 is dried before water is passed through the watering mat 10. In the state of FIG. 4A, there is almost no temperature difference Tdiff between the temperature (To) of the outside air temperature sensor 13 and the temperature of the air temperature sensor 15, and the temperature difference Tdiff is far from the maximum temperature difference Tmax. It is in a dry state. In this dry state, water flow to the watering mat 10 is started.

FIG. 4B shows a wet state of the upper half of the watering mat 10. Since water is supplied to the watering mat 10 from the water supply pipe 51 provided at the upper part of the watering mat 10, the watering mat 10 is submerged from the upper part. In the state of FIG. 4 (B), since the lower half of the watering mat 10 is dry, the water flow to the watering mat 10 is continued.
In FIG. 4 (A) (B), watering is started from the state where the watering mat 10 is dry. FIG. 5 shows the temperature transition of the system when watering is started from the state where the watering mat 10 is dry. At this time, as shown in FIG. 5, initially, the amount of water spray increases, and the air temperature Td detected by the air temperature sensor 15 rapidly decreases, and then the temperature (To) of the outside air temperature sensor 13 and the air temperature sensor The temperature difference Tdiff from 15 gradually approaches the maximum temperature difference Tmax. Water spraying from the header 51A continues, the temperature difference Tdiff further approaches the maximum temperature difference Tmax, and around the point C, the temperature difference Tdiff substantially coincides with the maximum temperature difference Tmax. Around the point C, the valve opening of the water supply electromagnetic valve 58 is greatly reduced, the air temperature Td detected by the air temperature sensor 15 rises once, and the air temperature sensor receives the water supply from the header 51A again. The air temperature Td detected at 15 is inverted and lowered.

FIG. 4C shows the entire surface of the watering mat 10 being wet. When the water flow is completed to the lower part of the watering mat 10, the temperature of the air temperature sensor 15 is lowered.
FIG. 6 shows the temperature transition of this system when watering is started from a state where the watering mat 10 is sufficiently wet. At this time, the above-described temperature difference Tdiff has already approached the maximum temperature difference Tmax. Therefore, the transition of the temperature after point C in FIG. In practice, as shown in FIG. 6, the temperature changes while the outside air temperature To detected by the outside air temperature sensor 13 and the air temperature Td detected by the air temperature sensor 15 are alternately repeated up and down.
In the state shown in FIG. 4C, the master controller 56 controls the water supply electromagnetic valve 58 so that the valve opening is greatly reduced, so that waste of water supply is reduced.

According to the present embodiment, when the temperature difference Tdiff between the outside air temperature To and the air temperature Td approaches the maximum temperature difference Tmax, the valve opening degree of the water supply electromagnetic valve 58 is reduced by the water supply valve controller 55, and the watering mat. The amount of watering to 10 is reduced.
Further, when the temperature difference Tdiff deviates from the maximum temperature difference Tmax, more water supply is required, so the watering amount is determined again, and the valve opening degree of the water supply electromagnetic valve 58 is opened based on this watering amount. As a result, the amount of water sprayed onto the watering mat 10 is adjusted to be large.
Therefore, according to the present embodiment, fine control of the amount of water supplied to the watering mat 10 is possible, and the water saving effect is further enhanced.
In addition, according to the present embodiment, since the air temperature sensor 15 is provided at the lower part of the watering mat 10, the water supply electromagnetic valve 58 can be opened until the entire watering mat 10 gets wet after the water supply is started. It can be pulled out to the maximum.
Further, according to the present embodiment, the state determination process in the flow shown in FIG. 4 is executed for each data measurement cycle, and the state of the watering mat 10 is determined and changed in real time, so unnecessary water supply is reduced. Water saving is possible.

As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this embodiment. Since only one embodiment of the present invention is illustrated, changes and applications can be arbitrarily made without departing from the spirit of the present invention.
For example, in the control by the master controller 56, when the load (evaporator 35) enters the defrosting operation or enters the thermo-off state regardless of the processing flow shown in FIG. It may be forcibly closed.
In addition, for example, by putting a Legionella sanitizer in the water storage tank 61, it is possible to improve hygiene and the environment. Moreover, a preferable environmental condition can be maintained by exchanging the sterilizing agent about once a month. The water temperature of the water storage tank 61 is constantly monitored by a sensor (not shown), and when the temperature exceeds the set temperature, the cooling water in the water storage tank is drained and at the same time, for example, tap water is newly supplied to the water storage tank. May be.
Further, the cooling water in the water storage tank 61 may be forcibly drained once / day in order to maintain the environmental state. Tap water may flow directly to the watering mat 10.

As another embodiment, although not shown in the drawings, the watering mat 10 has, for example, a rectangular shape when viewed from the front, and is held in a state where a plurality of watering mats are stacked on a holding frame having a predetermined thickness. Also good.
In addition, for example, the specification is such that seven 5 mm-thick sprinkling mats are stacked, and the sprinkling mats with the outermost layer dust attached thereto are sequentially separated and removed one by one according to the dirt. Also good.
By doing so, it is possible to easily update the watering mat alone, and it is possible to prevent a decrease in cooling efficiency due to clogging.
Further, for example, as a further modification, a single watering mat having a thickness of about 30 mm may be provided on the outside of the room with one or more watering mats having a thickness of, for example, 5 mm stacked. .

DESCRIPTION OF SYMBOLS 1 Refrigerator 10 Sprinkling mat 12 Outside air humidity sensor 13 Outside air temperature sensor 15 Air temperature sensor 30 Refrigerant cycle 31 Condenser 33 Expansion valve 35 Evaporator 37 Compressor 55 Water supply valve controller 56 Master controller 58 Water supply solenoid valve To Outdoor temperature Ho Outside air Humidity Td Air temperature Tmax Maximum temperature difference Tdiff Temperature difference

Claims (1)

By dripping water through a water supply valve to a watering mat installed on the windward side of the heat exchanger of the refrigerator, the heat passing through the watering mat is deprived of the heat of vaporization and the condensation load is reduced. In the watering device
An outside air humidity sensor for detecting outside air humidity Ho;
An outside air temperature sensor for detecting the outside air temperature To;
An air temperature sensor installed on the wind of the heat exchanger and detecting an air temperature Td of the air passing through the watering mat,
Control for opening and closing the water supply valve based on the temperature difference Tdiff between the outside air temperature To detected by the outside air temperature sensor and the air temperature Td detected by the air temperature sensor and the outside air humidity Ho detected by the outside air humidity sensor. with a part,
The control unit calculates a maximum temperature difference Tmax based on the outside air temperature To and the outside air humidity Ho, and decreases the water spray amount as the temperature difference Tdiff approaches the maximum temperature difference Tmax. .

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