JP6696930B2 - Temperature control equipment - Google Patents

Description

The present invention relates to a temperature adjustment facility that adjusts the temperature of a room to be cooled.

The storage room for storing fresh food and the like is cooled by a cooling device and kept at a predetermined temperature. The cooling device circulates the refrigerant in the order of the evaporator, the compressor, the condenser, and the expansion valve, exchanges heat between the refrigerant passing through the evaporator and the air in the storage chamber, and cools the air in the storage chamber. The refrigerant passes through the evaporator and is vaporized, then compressed by the compressor, and radiates heat when passing through the condenser to be condensed.
Here, in the cooling device, when frost is formed on the evaporator, the heat exchange efficiency of the evaporator is reduced. Therefore, in an environment where frost is formed on the evaporator, it is effective to employ a cooling device capable of performing the defrosting operation, and the defrosting operation is started at the timing when it is considered that the evaporator is frosted (cited reference 1, 2).

JP, 2002-107014, A JP, 2008-249268, A

However, the conventional method cannot stably detect the frost formation on the evaporator. For example, in a storage room in which a plurality of cooling devices are installed, if the condition that the temperature difference between the room temperature and the set temperature is equal to or higher than a predetermined value is set as the condition for frosting the evaporator, the evaporator can be cooled by one cooling device. Room temperature may be kept at the set temperature even if there is frost. Then, if the cooling device continues the cooling operation in a state where the efficiency of heat exchange by the evaporator is lowered, liquid refrigerant is sucked into the compressor, and in some cases a malfunction of the compressor occurs, requiring replacement of the compressor. Becomes

Therefore, it is important to prevent the failure of the compressor when the cooling device continues the cooling operation when the heat exchange efficiency of the evaporator is reduced, including the condition where the evaporator is frosted. Is. Particularly, in a cooling device having a high cooling capacity, the compressor is large, and the economical burden for repairing or replacing the compressor is large.
In addition, in recent years, there is an increasing need for controlling the cooling device from a location remote from the storage room.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a temperature adjustment facility that can remotely and stably avoid continuation of a cooling operation in a state where heat exchange efficiency is reduced.

The temperature control equipment according to the present invention which meets the above-mentioned object has a cooling device provided with an indoor unit and an outdoor unit, and temperature control equipment for adjusting the temperature of a cooling target room by cooled air blown out from the indoor unit. In, the cooled air is blown from the indoor unit thermometer, the measured temperature of the thermometer is detected, a control device for controlling the operation of the cooling device, and the control device is connected via an internet line, A remote control terminal that acquires the measured temperature of the thermometer and the power consumption value of the cooling device and displays each on a display device is provided, and the measured temperature displayed on the display device is a predetermined temperature. Thus the first input operation made by a timing which is a higher state, transmits a first signal to the control device, to perform occasional defrosting operation in the indoor unit, an unmoving regular to the second input operation of defrost or the power consumption value does not have seen improvement in cooling capacity by the driver is performed in a state in which a predetermined or more Accordingly, to transmit a second signal to the control device, the cooling Shut down the equipment.

In the temperature control facility according to the present invention, it is preferable that the remote operation terminal transmits a third signal to the control device to set a start timing of a periodic defrosting operation of the indoor unit.

In the temperature control facility according to the present invention, there are a plurality of cooling devices, and the control device detects that the power value consumed in the entire facility in which the room to be cooled is provided has risen to a predetermined value. It is preferable to selectively stop the cooling device.

In the temperature control facility according to the present invention, an attic thermometer connected to the control device and arranged in the attic space of the facility in which the room to be cooled is provided, and a ventilation fan for discharging the air in the attic space to the outside of the facility. It is preferable that the control device further includes: and activate the ventilation fan by detecting that the temperature measured by the attic thermometer is equal to or higher than a predetermined temperature.

In the temperature adjustment facility according to the present invention, further connected to the control device, further comprising an indoor thermometer for measuring the room temperature of the cooling target room, the control device stores the transition of the measured temperature of the indoor thermometer, It is preferable that the remote operation terminal obtains information on the transition of the measured temperature of the indoor thermometer from the control device.

The temperature control equipment according to the present invention is a thermometer to which cooled air is blown from an indoor unit, a control device that detects the temperature measured by the thermometer and controls the operation of the cooling device, and an internet line to the control device. It is equipped with a remote control terminal that is connected and acquires the temperature measured by the thermometer.When the heat exchange efficiency of the evaporator decreases, the temperature of the air blown from the indoor unit to the thermometer increases, so A state where the heat exchange efficiency of the evaporator is lowered can be detected remotely. Further, since the remote control terminal transmits the first signal to the control device to cause the indoor unit to perform the irregular defrosting operation and transmits the second signal to the control device to stop the operation of the cooling device. Therefore, it is possible to remotely avoid the continuation of the cooling operation in the state where the heat exchange efficiency of the evaporator is lowered. Therefore, the temperature control facility according to the present invention can remotely and stably avoid continuation of the cooling operation in the state where the heat exchange efficiency is lowered.

It is an explanatory view of temperature regulation equipment concerning one embodiment of the present invention. It is explanatory drawing which shows the connection of the same temperature adjustment facility.

Subsequently, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.
As shown in FIGS. 1 and 2, the temperature adjusting facility 10 according to the embodiment of the present invention has cooling devices 11 to 13 each including an indoor unit 24 and an outdoor unit 25, and blows out from the indoor unit 24. In the equipment for adjusting the temperature of the cooling target room R by the cooled air, the thermometers 14 to 19 to which the cooled air is blown from the indoor unit 24 and the measured temperatures of the thermometers 14 to 19 are detected, A control device 21 for controlling the operation of the cooling devices 11 to 13 and a remote control terminal 23 connected to the control device 21 via a communication line 22 are provided. The details will be described below.

The room R to be cooled shown in FIG. 1 is a room provided in the facility S that requires temperature adjustment (for example, a storage for storing fresh food and the like).
As shown in FIG. 1, the cooling device 11 (the same applies to the cooling devices 12 and 13) is connected to a plurality of indoor units 24 each having an evaporator and a fan (not shown), and is connected to the plurality of indoor units 24, and a compression device (not shown) is provided. Outdoor unit 25 having a machine, a condenser and an expansion valve. In this embodiment, each of the cooling devices 11, 12 and 13 includes two indoor units 24, but a cooling device including three or more indoor units or a cooling device including one indoor unit may be adopted. Good.

In the cooling devices 11, 12, and 13, the refrigerant that has sequentially passed through the compressor, the condenser, and the expansion valve is sent from the outdoor unit 25 to the evaporator of each indoor unit 24. Each indoor unit 24 takes in the air in the room R to be cooled by the operation of the fan and supplies it to the evaporator, and cools the air supplied to the evaporator by heat exchange with the refrigerant passing through the evaporator. It blows out of the unit 24.

Each of the cooling devices 11, 12, and 13 includes two solenoid valves (not shown), and each solenoid valve corresponds to each indoor unit 24. In each indoor unit 24, the refrigerant is supplied from the outdoor unit 25 when the corresponding solenoid valve is open, and the supply of the refrigerant from the outdoor unit 25 is stopped when the corresponding solenoid valve is closed.
Therefore, the indoor unit 24 can perform the cooling operation in which the taken-in air is cooled and blown out by the evaporator when the corresponding solenoid valve is in the open state, and the taken-in air is evaporated when the corresponding solenoid valve is in the closed state. I can't cool it with a container.

As shown in FIG. 1, thermometers 14 to 19 are arranged near the indoor units 24 of the cooling devices 11, 12, and 13, respectively, and the air blown out from the indoor units 24 flows to the thermometers 14 to 19. Each is sprayed.
In the cooling target room R, a plurality of indoor thermometers 26, 27, 28 that measure the room temperature of the cooling target room R, a plurality of hygrometers 29, 30, 31 that measure the humidity of the cooling target room R, and the cooling target room A plurality of oximeters 32, 33 for measuring the oxygen concentration of R and a plurality of sprayers 34, 35, 36 for spraying water are provided.

In the facility S, a revolving light 37 is attached outside the cooling target room R (near the entrance of the cooling target room R in the present embodiment), and a plurality of lights 38 are provided inside and outside the cooling target room R, respectively. In the attic space Q of the facility S, an attic thermometer 40 for measuring the temperature of the attic space Q and a ventilation fan 41 for discharging the air in the attic space Q to the outside of the facility S are arranged. Further, the facility S is provided with a power meter 42 that measures the total value of the power consumed by the electric devices provided in the entire facility S. In addition, the electric device is a device that consumes electric power for operation, and includes cooling devices 11, 12, 13, thermometers 14 to 19, a control device 21, indoor thermometers 26, 27, 28, and hygrometers 29, 30. , 31, oximeters 32, 33, sprayers 34, 35, 36, rotary lamp 37, lighting 38, attic thermometer 40, and ventilation fan 41 correspond to the electric devices.

As shown in FIGS. 1 and 2, the facility S is provided with a control device 21 that controls the operation of the cooling devices 11, 12, and 13. The control device 21 includes a communication line (for example, an internet line) 22. The remote control terminal 23 is connected via.
As shown in FIG. 2, the control device 21 includes cooling devices 11, 12, 13, thermometers 14 to 19, indoor thermometers 26, 27, 28, hygrometers 29, 30, 31, oximeters 32, 33, and sprays. Signals are connected to the machines 34, 35, 36, revolving light 37, lighting 38, attic thermometer 40, ventilation fan 41 and electric power meter 42, and thermometers 14 to 19, indoor thermometers 26, 27, 28, hygrometer 29, The measurement values of 30, 31, the oximeters 32, 33, the attic thermometer 40, and the electric power meter 42 are obtained intermittently (for example, every 0.1 to 0.5 seconds).

The remote control terminal 23 uses the thermometers 14 to 19, the indoor thermometers 26, 27, 28, the hygrometers 29, 30, 31, the oxygen meters 32, 33, the attic thermometer 40, and the electric power meter 42 to measure the respective measured values. It is acquired intermittently (for example, every 0.1 to 0.5 seconds) via the control device 21 and the communication line 22.
The control device 21 can store the acquired transitions of the respective measured values of the indoor thermometers 26, 27, 28 and the hygrometers 29, 30, 31, and the remote operation terminal 23 controls the indoor thermometer 26 from the control device 21. , 27, 28 and hygrometers 29, 30, 31 can acquire information on the transition of each measured value.

The control device 21 and the remote operation terminal 23 can be configured by an information processing terminal including a display device (for example, a liquid crystal display) and an input device (for example, a keyboard or a touch screen), and can be connected to a printing machine. The control device 21 and the remote control terminal 23 respectively include a thermometer 14 to 19, an indoor thermometer 26, 27, 28, a hygrometer 29, 30, 31, an oximeter 32, 33, an attic thermometer 40, and an electric power meter 42. In addition to the measured values, the changes in the measured values of the indoor thermometers 26, 27, 28 and the hygrometers 29, 30, 31 can be displayed on a display device or printed by a connected printing machine.

The target temperature (° C.), the target humidity (%), and the required oxygen concentration of the room R to be cooled are input to the control device 21 by an input from the input device of the control device 21 or an input device of the remote control terminal 23. (%) And the ventilation temperature (° C.) at which hot air in the attic space Q should be discharged can be set.
When T ° C. is set as the target temperature of the room R to be cooled, when the control device 21 detects the thermometers 14 to 19 whose measured temperature is equal to or lower than T−α (° C.), the thermometers 14 to 19 are detected. The electromagnetic valve corresponding to the indoor unit 24 that is blowing air is closed, and the cooling operation of the indoor unit 24 is temporarily stopped.

Even after the corresponding solenoid valve is closed, the indoor unit 24 continues to operate the fan and continues to blow air to the thermometers 14 to 19.
When the control device 21 detects that the temperature measured by the thermometers 14 to 19 blown with air from the indoor unit 24 that is not in the cooling operation exceeds T + α (° C.), it corresponds to the indoor unit 24. The solenoid valve is opened and the indoor unit 24 is restarted for cooling operation.

Then, when the control device 21 detects that the respective measured values of the hygrometers 29, 30, 31 become larger than the value obtained by adding β (%) to the target humidity, the cooling devices 11, 12, 13 are dehumidified. When it is detected that the measured values of the hygrometers 29, 30, 31 are smaller than the value obtained by subtracting β from the target humidity, the sprayers 34, 35, 36 are caused to spray water.
When the control device 21 detects that at least one of the measured values of the oximeters 32 and 33 is equal to or lower than the required oxygen concentration, the control device 21 turns on the revolving light 37, so that the operator has a low oxygen concentration in the room R to be cooled. Let us know that
When the temperature of the attic space Q of the facility S is high, the temperature adjustment of the cooling target room R becomes inefficient, so the control device 21 causes the temperature measured by the attic thermometer 40 to be a predetermined temperature (for example, 40 ° C.). When the above is detected, the ventilation fan 41 is operated to lower the temperature of the attic space Q by ventilation.

In addition, each indoor unit 24 of the cooling devices 11, 12, and 13 is provided with a defrosting operation as an operation mode for removing frost generated in the evaporator. When the evaporator is frosted, the cooling capacity of the indoor unit 24 decreases, so that the cooling capacity that has been decreased can be improved by removing the frost from the evaporator.
In the defrosting operation, a periodical defrosting operation whose start timing is predetermined and a timing at which a signal (hereinafter, also referred to as “first signal”) is transmitted from the remote operation terminal 23 to the control device 21 There are occasional defrosting operations that occur.

The periodic defrosting operation is performed by designating the indoor unit 24 that is the target of the defrosting operation, and the cooling device 11 (also for the cooling devices 12 and 13) is cooled by the indoor unit 24 that performs the defrosting operation. The indoor units 24 that operate can be mixed.
In the present embodiment, one of the six indoor units 24 of the cooling devices 11, 12, 13 is made to perform (periodic) defrosting operation, and the other five are made to perform cooling operation. As a result, some of the indoor units 24 cool the cooling target chamber R even during the defrosting operation. By shifting the start timing of the regular defrosting operation of each indoor unit 24, all the six indoor units 24 perform the periodic defrosting operation at different timings.

The administrator can set a periodic defrosting operation by an input operation using the input device of the remote operation terminal 23, and when the corresponding operation is performed on the remote operation terminal 23, the remote operation terminal 23 causes the control device to operate. A signal (third signal) is transmitted to the control unit 21 to set the control device 21 for the start timing of the periodic defrosting operation of each indoor unit 24. The start timing of the periodic defrosting operation is set by designating the start time of each defrosting operation, or by designating the initial start time and the time interval for starting the defrosting operation.

Heaters are attached to the evaporators of all the indoor units 24 of the cooling devices 11, 12, and 13, respectively. The periodic defrosting operation is performed by closing the electromagnetic valve corresponding to the target indoor unit 24, turning on the heater of the target indoor unit 24, and stopping the fan of the target indoor unit 24.
The indoor unit 24 resumes the cooling operation after performing the regular defrosting operation for a predetermined time (10 to 60 minutes).

In addition, the administrator is in a state where the measured temperature of the thermometers 14 to 19 displayed on the display device of the remote control terminal 23 is higher than a value obtained by adding a predetermined temperature (for example, α ° C.) to the target temperature of the room R to be cooled. It is possible to know the indoor unit 24 having a reduced cooling capacity, that is, the indoor unit 24 in which the evaporator may be frosted by seeing that the cooling capacity is maintained. In that case, the administrator can cause the indoor unit 24 to perform an irregular defrosting operation by performing a predetermined input operation from the input device of the remote operation terminal 23.

The predetermined input operation on the remote control terminal 23 includes designation of the target indoor unit 24, and when the corresponding input operation is performed, the remote control terminal 23 has information on the designated indoor unit 24. The first signal is transmitted to the control device 21. The control device 21 that has received the first signal causes the cooling devices 11, 12, and 13 having the corresponding indoor unit 24 to perform the defrosting operation of the indoor unit 24 irregularly.

In the irregular defrosting operation, the solenoid valve corresponding to the target indoor unit 24 is closed, the fan included in the target indoor unit 24 is activated, and the heater of the target indoor unit 24 is stopped. Done. Since the indoor unit 24 that performs the irregular defrosting operation is scheduled for the cooling operation, not heating the air by the heater is suitable from the viewpoint of adjusting the cooling target room R to a predetermined temperature.

The indoor unit 24 performs an irregular defrosting operation for a predetermined time (10 to 60 minutes), then ends the defrosting operation, and restarts the cooling operation.
When the cause of the cooling capacity decrease is frost formation on the evaporator, the cooling capacity is improved by the irregular defrosting operation, so that the air blown out from the indoor unit 24 restarting the cooling operation is It will be less than or equal to the target temperature plus the predetermined temperature.

Therefore, when the temperature of the air blown from the indoor unit 24 that has restarted the cooling operation in spite of completing the irregular defrosting operation continues to be higher than the value obtained by adding the predetermined temperature to the target temperature of the cooling target room R, There may be a problem with the cooling device 11, 12, 13. If the cooling operation is continued with the cooling capacity lowered, liquid back to the compressor occurs, and repair or replacement of the compressor may be required depending on the case.

The repair and replacement of the compressor imposes an economic burden, and since the cooling devices 11, 12 and 13 in which the compressor has failed cannot contribute to the temperature adjustment of the chamber R to be cooled, avoidance of liquid back to the compressor. This is important, and if the cooling capacity continues to decline, an early solution is required.
Therefore, in the present embodiment, a predetermined input operation for designating the cooling devices 11, 12, 13 is performed on the remote operation terminal 23, so that the remote operation terminal 23 sends a signal (second signal) to the control device 21. Is transmitted so that the operation of the designated cooling device 11, 12, 13 can be stopped (including the stop of the compressor).

The administrator sees the temperature measured by the thermometers 14 to 19 on the display device of the remote control terminal 23, knows the indoor unit 24 whose cooling capacity is lowered, and performs an input operation from the remote control terminal 23 to perform cooling. It is possible to stop the cooling devices 11, 12, and 13 including the indoor unit 24 whose capacity is reduced.
Therefore, the thermometers 14 to 19 used for controlling the stop and start of the cooling operation of the indoor unit 24 for adjusting the temperature of the room R to be cooled detect the indoor unit 24 in which the cooling capacity is deteriorated. It is also used to do.

Further, the remote control terminal 23 can obtain the power values consumed by the cooling devices 11, 12, and 13 from the cooling devices 11, 12, and 13 via the control device 21, respectively. When any of the cooling devices 11, 12, and 13 consumes electric power of a predetermined value or more, there is a possibility that refrigerant leakage or the like has occurred. Therefore, it is effective that the administrator can confirm the power value consumed by each of the cooling devices 11, 12, and 13 on the remote control terminal 23.

Then, the control device 21 intermittently acquires the measurement value of the power meter 42, detects that the power value consumed by the entire facility S has risen to a predetermined value, and the cooling devices 11, 12, 13 are detected. Can be selectively stopped. Thereby, for example, when it is first detected that the power consumption of the entire facility S has risen to a predetermined value, only the cooling device 11 is stopped, and the power consumption of the entire facility S is stopped while the cooling device 11 is stopped. When the electric power again rises to the predetermined value, the cooling device 12 is stopped.
By this control, it becomes possible to prevent the power value consumed in the entire facility S from exceeding the maximum demand power (demand value).

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and changes in conditions and the like without departing from the gist are all within the scope of application of the present invention.
For example, the remote control terminal may not be able to acquire the power value consumed by the cooling device.
Further, depending on the target temperature of the room to be cooled, it may be determined whether or not to operate the heater when performing the periodic defrosting operation.
The number of cooling devices provided in one cooling target chamber may be one, two, or four or more.
Furthermore, an attic thermometer is not absolutely necessary.

10: Temperature control equipment, 11, 12, 13: Cooling device, 14-19: Thermometer, 21: Control device, 22: Communication line, 23: Remote operation terminal, 24: Indoor unit, 25: Outdoor unit, 26, 27, 28: Indoor thermometer, 29, 30, 31: Hygrometer, 32, 33: Oxygen meter, 34, 35, 36: Sprayer, 37: Revolving light, 38: Illumination, 40: Attic thermometer, 41: Ventilation fan, 42: Electric power meter, Q: Attic space, R: Room to be cooled, S: Facility

Claims (5)

In a temperature adjustment facility having a cooling device including an indoor unit and an outdoor unit, the temperature of the room to be cooled is adjusted by the cooled air blown out from the indoor unit,
A thermometer to which cooled air is blown from the indoor unit;
Detecting the temperature measured by the thermometer, a control device for controlling the operation of the cooling device,
A remote control terminal that is connected to the control device via an internet line, acquires the measured temperature of the thermometer and the power consumption value of the cooling device, and displays each on a display device ;
It said remote control terminal, depending on the first input operation of measuring the temperature displayed on the display device is performed by the timing that has become higher than a predetermined temperature condition, and transmitting a first signal to the control device, A second input operation performed in a state in which the indoor unit is made to perform an irregular defrosting operation and no improvement in cooling capacity due to the irregular defrosting operation is observed, or in a state in which the power consumption value is equal to or greater than a predetermined value. create the result, it sends a second signal to the control device, temperature control equipment, characterized in that stops the operation of the cooling device. The temperature control facility according to claim 1, wherein the remote operation terminal transmits a third signal to the control device to set a start timing of a periodic defrosting operation of the indoor unit. Adjustment equipment. The temperature control facility according to claim 1 or 2, wherein there are a plurality of the cooling devices, and the control device determines that an electric power value consumed in the entire facility in which the room to be cooled is provided has risen to a predetermined value. A temperature adjusting facility, which detects and stops the cooling device selectively. The temperature adjustment facility according to any one of claims 1 to 3, wherein the attic thermometer connected to the control device and arranged in the attic space of the facility in which the room to be cooled is provided, and the attic space Further comprising a ventilation fan for discharging air to the outside of the facility, wherein the control device detects that the temperature measured by the attic thermometer is equal to or higher than a predetermined temperature, and operates the ventilation fan. Temperature control equipment to do. The temperature adjustment facility according to any one of claims 1 to 4, further comprising an indoor thermometer that is connected to the control device and measures a room temperature of the room to be cooled, wherein the control device is the indoor thermometer. Of the measured temperature of the indoor thermometer, the remote control terminal acquires information of the measured temperature of the indoor thermometer from the control device.

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