JP2014099086A - Temperature control system and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature control system capable of achieving highly accurate temperature control and a method for controlling the temperature control system.SOLUTION: A temperature control system 21 includes: a cooling device 22 for cooling the object of temperature regulation; a heating device 23 for heating the object of temperature regulation; a temperature detection device 24 for detecting the temperature of the object of temperature regulation; and a control device 25 for controlling the operations of the cooling device 22 and the heating device 23. When the detection temperature of the temperature detection device 24 is higher than a first reference temperature which is higher than the target temperature of the object of temperature regulation, the control device 25 puts the cooling device 22 in an operating state, and when the detection temperature becomes lower than a second reference temperature which is lower than the first reference temperature, the control device 25 puts the cooling device 22 in a halting state, and when the detection temperature is lower than a third reference temperature which is lower than the target temperature, the control device 25 puts the heating device 23 in an operating state, and when the detection temperature becomes higher than a fourth reference temperature which is higher than the third reference temperature, the control device 25 puts the heating device 23 in a halting state.

Description

  The present invention relates to a temperature control system and a control method for the temperature control system.

For example, a refrigerated warehouse equipped with a temperature control system is used in an environment where the outside air temperature is lower than the target temperature (set internal temperature) depending on the land pattern (cold region), season (winter season), etc. If so, the temperature control system is provided with heating means in addition to cooling means.
The heating means is, for example, a heater or the like, and heats the temperature-controlled object until the target temperature is reached and keeps the temperature.

  In such a case, the temperature control system controls the operating / stopped state of the cooling means based on the temperature detected by the temperature detecting means for detecting the temperature of the temperature adjustment target, and detects the temperature of the outside air. The operating / stopping state of the heating means is controlled based on the temperature detected by the means (see, for example, Patent Document 1).

  Further, in such a case, the temperature control system performs the temperature adjustment based on the detection temperature of the temperature detection unit that detects the temperature of the temperature adjustment target and the detection temperature of the temperature detection unit that detects the temperature of the outside air. The amount of heat released from the object is obtained, and it is determined which of the cooling means and the heating means is operated based on the amount of heat released (see, for example, Patent Document 2).

Japanese Patent No. 3190793 (paragraphs [0011]-[0045], FIG. 1-9) JP-A-1-147276 (column 5, line 4, column 12, line 11, FIG. 1-5)

  In the conventional temperature control system, the tendency of the temperature change of the temperature control target is only estimated based on the temperature detected by the temperature detecting means for detecting the temperature of the outside air. For example, the temperature for detecting the temperature of the outside air In the case where an error caused by the installation environment occurs in the detection temperature of the detection means, there is a problem that high-precision temperature control cannot be realized.

The present invention has been made to solve the above-described problems, and an object thereof is to obtain a temperature control system capable of realizing highly accurate temperature control.
Another object of the present invention is to obtain a temperature control system control method capable of realizing highly accurate temperature control.

  The temperature control system according to the present invention includes a cooling unit that cools the temperature adjustment target, a heating unit that heats the temperature control target, a temperature detection unit that detects the temperature of the temperature control target, and the cooling unit. And a control means for controlling the operation of the heating means, wherein the control means compares the detected temperature of the temperature detecting means with a first reference temperature that is higher than the target temperature of the temperature adjustment target. When it is high, the cooling unit is in an operating state, and when the detected temperature is low compared to a second reference temperature that is lower than the first reference temperature, the cooling unit is stopped, and the detected temperature is When the temperature is lower than the third reference temperature, which is lower than the target temperature, the heating means is put into operation, and when the detected temperature is higher than the fourth reference temperature, which is higher than the third reference temperature, The heating means is stopped. .

  In the temperature control system according to the present invention, the control means controls the operating / stopped states of the cooling means and the heating means based on the temperature detected by the temperature detecting means for detecting the temperature of the temperature adjustment target. The tendency of the temperature change of the adjustment target is accurately reflected in the control, so that highly accurate temperature control is realized.

It is a figure which shows the structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 of this invention was applied. It is a figure which shows the system configuration | structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 of this invention was applied. It is a figure which shows the control flow of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 of this invention was applied. It is a figure which shows the temperature change of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 of this invention was applied. It is a figure which shows the system configuration | structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 of this invention was applied. It is a figure which shows the control flow of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 of this invention was applied. It is a figure which shows the control flow of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 of this invention was applied. It is a figure which shows the temperature change of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 of this invention was applied. It is a figure which shows the temperature change of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 of this invention was applied. It is a figure which shows the system configuration | structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 3 of this invention was applied.

Hereinafter, a temperature control system according to the present invention will be described with reference to the drawings.
In the following, the case where the temperature control system according to the present invention is applied to a refrigerated warehouse will be described. However, for example, it is applied to other uses such as a refrigerated warehouse, a refrigerated warehouse, interpersonal cooling and heating, and temperature control for industrial processes. May be.
In the following, the case where the temperature control system according to the present invention is a system that controls the temperature of air will be described. For example, single-phase / multi-phase fluids, powders, granules, etc. It may be a system for controlling temperature.
Moreover, in each figure, the same code | symbol is attached | subjected to the same or similar member or part.
Further, the illustration of the fine structure is simplified or omitted as appropriate.
In addition, overlapping or similar descriptions are appropriately simplified or omitted.

Embodiment 1 FIG.
A refrigerator-freezer warehouse to which the temperature control system according to Embodiment 1 is applied will be described.
<Configuration of refrigerated warehouse to which temperature control system is applied>
Below, the structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 was applied is demonstrated.
FIG. 1 is a diagram showing a configuration of a refrigerated warehouse to which a temperature control system according to Embodiment 1 of the present invention is applied.
As shown in FIG. 1, the freezer / refrigerated warehouse 11 is a warehouse with high heat insulation in which six surfaces are covered with a heat insulating panel.
The refrigerated warehouse 11 has one or more doors 12.
The load 13 is carried in / out from the opening / closing door 12.

A temperature control system 21 is provided in the freezer / refrigerator warehouse 11.
The temperature control system 21 includes a cooling device 22, a heating device 23, an air temperature detection device 24, a control device 25, and the like.

The cooling device 22 cools the air in the freezer / refrigerated warehouse 11.
The cooling device 22 is, for example, a refrigerator and a cooler that are pipe-connected by a refrigerant pipe.
There may be one or more pairs of refrigerators and coolers.
One cooler may be pipe-connected to one refrigerator, or a plurality of coolers may be pipe-connected.
The cooling device 22 corresponds to “cooling means” in the present invention.

The heating device 23 heats the air in the freezer / refrigerated warehouse 11.
The heating device 23 is, for example, a heater.
There may be one heater or a plurality of heaters.
The heating device 23 corresponds to the “heating means” in the present invention.

  The cooling device 22 and the heating device 23 are temperature control devices having both a function as a cooling device (that is, a cooling unit) and a function as a heating device (that is, a heating unit), for example, cooling operation and heating operation are possible. It may be replaced with a heat pump device (cooling / heating device).

The air temperature detection device 24 detects the air temperature in the freezer / refrigerator warehouse 11.
The air temperature detection device 24 may have one temperature sensor or a plurality of temperature sensors.
The temperature sensor is, for example, a thermistor, a platinum resistance temperature detector (Pt100Ω or the like), and the like.
A plurality of temperature sensors are installed in the freezer / refrigerated warehouse 11 with a spatial extension, and the air temperature detection device 24 depends on the temperature distribution of air in the frozen / refrigerated warehouse 11, for example, average temperature, maximum temperature, etc. The minimum temperature or the like may be detected.
The air temperature detection device 24 corresponds to “temperature detection means” in the present invention.

FIG. 2 is a diagram showing a system configuration of a refrigerated warehouse to which the temperature control system according to Embodiment 1 of the present invention is applied.
As shown in FIG. 2, a cooling device 22, a heating device 23, an air temperature detection device 24 and the like are connected to the control device 25.
The control device 25 includes a controller provided in the cooling device 22, a controller provided in the heating device 23, a display, a remote controller, and the like.
The control device 25 corresponds to “control means” in the present invention.

  The control device 25 includes a target temperature setting unit 25a, a cooling thermo ON temperature setting unit 25b, a cooling thermo OFF temperature setting unit 25c, a heating thermo ON temperature setting unit 25d, a heating thermo OFF temperature setting unit 25e, and the like.

  The target temperature setting unit 25a of the control device 25 sets / changes the target temperature of the air in the freezer / refrigerated warehouse 11 according to the operation of a user (such as a manager of the freezer / refrigerated warehouse) or automatically.

The cooling thermo-ON temperature setting unit 25b of the control device 25 sets / changes the cooling thermo-ON temperature.
The cooling thermo-ON temperature is a temperature at which the control device 25 transmits an operation command to the cooling device 22.
The control device 25 transmits an operation command when the temperature detected by the air temperature detection device 24 is higher than the cooling thermo-ON temperature.
The cooling thermo-ON temperature corresponds to the “first reference temperature” in the present invention.

The cooling thermo OFF temperature setting unit 25c of the control device 25 sets / changes the cooling thermo OFF temperature.
The cooling thermo-OFF temperature is a temperature at which the control device 25 transmits a stop command to the cooling device 22.
The control device 25 transmits a stop command when the temperature detected by the air temperature detection device 24 becomes lower than the cooling thermo OFF temperature.
The cooling thermo-OFF temperature corresponds to the “second reference temperature” in the present invention.

The heating thermo-ON temperature setting unit 25d of the control device 25 sets / changes the heating thermo-ON temperature.
The heating thermo ON temperature is a temperature at which the control device 25 transmits an operation command to the heating device 23.
The control device 25 transmits an operation command when the detected temperature of the air temperature detecting device 24 is lower than the heating thermo ON temperature.
The heating thermo-ON temperature corresponds to the “third reference temperature” in the present invention.

The heating thermo OFF temperature setting unit 25e of the control device 25 sets / changes the heating thermo OFF temperature.
The heating thermo OFF temperature is a temperature at which the control device 25 transmits a stop command to the heating device 23.
The control device 25 transmits a stop command when the temperature detected by the air temperature detection device 24 becomes higher than the heating thermo OFF temperature.
The heating thermo OFF temperature corresponds to the “fourth reference temperature” in the present invention.

  Similarly, when the cooling device 22 and the heating device 23 are replaced with, for example, a heat pump device (cooling / heating device) capable of cooling operation and heating operation, the control device 25 similarly performs the cooling thermo-ON temperature, the cooling thermo-OFF temperature, and the heating thermometer. Based on the ON temperature and the heating thermo OFF temperature, the cooling operation and the heating operation are started and stopped.

The cooling thermo-ON temperature is set higher than the target temperature.
The heating thermo ON temperature is set lower than the target temperature.
The cooling thermo OFF temperature is set lower than the cooling thermo ON temperature.
The heating thermo OFF temperature is set higher than the heating thermo ON temperature.
The cooling thermo OFF temperature is set higher than the heating thermo OFF temperature.

Each temperature may be set manually by the user, or may be automatically set by the control device 25 so as to interlock with the target temperature.
When each temperature is manually set by the user, the user sets each temperature according to how the temperature in the refrigerated warehouse 11 changes due to outside air.
For example, in a case where the target temperature is used in a cold district, the period during which the target temperature is higher than the outside air temperature is longer, so the user sets the cooling thermo OFF temperature and the heating thermo OFF temperature higher.
When each temperature is automatically set by the control device 25, the control device 25 sets each temperature by adding or subtracting a preset temperature to the target temperature.
The temperature to be added / subtracted may be manually set / changed by the user, and is automatically set to a temperature corresponding to the detected temperature of the temperature detecting means for detecting the season, time zone, and outside temperature by the control device 25. -It may be changed.

<Operation of a refrigerated warehouse to which a temperature control system is applied>
Below, operation | movement of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 was applied is demonstrated.
FIG. 3 is a diagram showing a control flow of a refrigerated warehouse to which the temperature control system according to Embodiment 1 of the present invention is applied.
In step 101, the control device 25 sets the cooling thermo ON temperature, the cooling thermo OFF temperature, the heating thermo ON temperature, and the heating thermo OFF temperature, and proceeds to step 102.

In step 102, the control device 25 determines whether or not the temperature control of the temperature control system 21 is set to ON.
If it is not set to ON, it is determined in step 103 whether or not the cooling device 22 and the heating device 23 are in an operating state, and in step 104, a stop command is transmitted to the operating device. Proceed to
If it is set to ON, the process proceeds to step 105.

In step 105, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 is higher than the cooling thermo ON temperature.
If the detected temperature of the air temperature detection device 24 is higher than the cooling thermo-ON temperature, it is determined in step 106 whether or not the cooling device 22 is in operation, and in step 107, the stopped cooling device 22 is determined. An operation command is transmitted to step 102, and the process proceeds to step 102.
Otherwise, go to step 108.

In step 108, the control device 25 determines whether or not the temperature detected by the air temperature detection device 24 has become lower than the cooling thermo OFF temperature.
If the detected temperature of the air temperature detection device 24 is lower than the cooling thermo-OFF temperature, it is determined in step 109 whether or not the cooling device 22 is in an operating state, and in step 110, the cooling of the operating state is performed. A stop command is transmitted to the device 22, and the process proceeds to step 102.
Otherwise, go to step 111.

In step 111, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 is lower than the heating thermo ON temperature.
If the detected temperature of the air temperature detection device 24 is lower than the heating thermo ON temperature, it is determined in step 112 whether or not the heating device 23 is in an operating state, and in step 113, the heating device 23 in a stopped state is determined. An operation command is transmitted to step 102, and the process proceeds to step 102.
Otherwise, go to step 114.

In step 114, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 has become higher than the heating thermo OFF temperature.
If the detected temperature of the air temperature detection device 24 is higher than the heating thermo OFF temperature, it is determined in step 115 whether or not the heating device 23 is in operation, and in step 116 heating in the operation state is performed. A stop command is transmitted to the device 23, and the process proceeds to step 102.
Otherwise, go to step 102.

Note that the control flow shown in FIG. 3 is an example, and may be changed as appropriate.
For example, the control device 25 may control only ON / OFF of the cooling device 22 and the heating device 23, and the outputs of the cooling device 22 and the heating device 23 are changed according to the detected temperature of the air temperature detection device 24. Alternatively, ON / OFF may be controlled while changing the outputs of the cooling device 22 and the heating device 23.
For example, the control device 25 may perform control by changing the order of step 105, step 108, step 111, and step 114.
For example, the control device 25 may not include step 103, step 106, step 109, step 112, and step 115, and may send an operation / stop command regardless of the operation / stop state of the device.

<Operation of a refrigerated warehouse to which a temperature control system is applied>
Below, the effect | action of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 1 was applied is demonstrated.
FIG. 4 is a diagram showing a temperature change of the refrigerated warehouse to which the temperature control system according to Embodiment 1 of the present invention is applied.
In FIG. 4, the outside temperature is high at the beginning (left side in the figure), that is, the air temperature in the refrigerated warehouse 11 rises with the cooling device 22 and the heating device 23 stopped, and then (right side in the figure). ) Shows a case where the outside air temperature is low, that is, the air temperature in the refrigerated refrigerating warehouse 11 drops while the cooling device 22 and the heating device 23 are stopped.
Moreover, the cooling thermo OFF temperature is set to a temperature higher than the target temperature, and the heating thermo OFF temperature is set to a temperature lower than the target temperature.
As shown in FIG. 4, the air temperature in the refrigerated warehouse 11 is maintained at the target temperature regardless of whether the outside air temperature is high or the outside air temperature is low.

  That is, the temperature control system 21 determines whether the cooling device 22 and the heating device 23 are operating or stopped based on the temperature detected by the air temperature detection device 24 in which the control device 25 detects the air temperature in the refrigerated warehouse 11. In order to control, the tendency of the temperature change of the air in the freezer / refrigerator warehouse 11 will be correctly reflected in control, and highly accurate temperature control is implement | achieved.

  Further, the temperature control system 21 is configured such that the control device 25 detects a temperature of the air temperature detection device 24 that detects the air temperature in the refrigerated warehouse 11, the cooling thermo ON temperature, the cooling thermo OFF temperature, the heating thermo ON temperature, and the heating. Compared with the thermo OFF temperature, the operation of the cooling device 22 and the heating device 23 is controlled to control the operation / stop state, so that calculation of the amount of heat release and the like is not required, and highly accurate temperature control requires complicated calculation. Will be realized.

Furthermore, the temperature control system 21 is set to a temperature range in which both the cooling device 22 and the heating device 23 are stopped because the cooling thermo OFF temperature is set higher than the heating thermo OFF temperature (shown in FIG. 4). Energy-saving area ”) is formed and energy-saving performance is improved.
In addition, both the cooling device 22 and the heating device 23 are surely prevented from being in an operating state, and the air in the freezer / refrigerated warehouse 11 is not cooled and heated at the same time. Is improved.

Embodiment 2. FIG.
A refrigerator-freezer warehouse to which the temperature control system according to Embodiment 2 is applied will be described.
Note that, in the following, descriptions that overlap or are similar to those of the first embodiment are appropriately simplified or omitted.

<Configuration of refrigerated warehouse to which temperature control system is applied>
Below, the structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 was applied is demonstrated.
FIG. 5 is a diagram showing a system configuration of a refrigerated warehouse to which the temperature control system according to Embodiment 2 of the present invention is applied.
As shown in FIG. 5, the control device 25 includes a target temperature setting unit 25a, a cooling thermo ON temperature setting unit 25b, a cooling thermo OFF temperature setting unit 25c, a heating thermo ON temperature setting unit 25d, and a heating thermo OFF temperature setting unit 25e. And a cooling thermo OFF time counting unit 25f, a heating thermo OFF time counting unit 25g, and the like.

The cooling thermo OFF time counting unit 25f counts the continuous time in which the cooling device 22 is stopped.
The cooling thermo OFF temperature setting unit 25c sets the cooling thermo OFF temperature based on the continuous time counted by the cooling thermo OFF time counting unit 25f.
The upper limit of the setting range of the cooling thermo OFF temperature is set to a temperature lower by a preset temperature Temp-a than the cooling thermo ON temperature.
The temperature Temp-a corresponds to the “first temperature” in the present invention.

The heating thermo OFF time counting unit 25g counts the continuous time in which the heating device 23 is stopped.
The heating thermo OFF temperature setting unit 25e sets the heating thermo OFF temperature based on the continuous time counted by the heating thermo OFF time counting unit 25g.
The setting range of the heating thermo-OFF temperature is set such that the lower limit is higher than the heating thermo-ON temperature by a preset temperature Temp-b.
The temperature Temp-b corresponds to the “second temperature” in the present invention.

<Operation of a refrigerated warehouse to which a temperature control system is applied>
Below, operation | movement of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 was applied is demonstrated.
6 and 7 are diagrams showing a control flow of a refrigerated warehouse to which the temperature control system according to Embodiment 2 of the present invention is applied.
In step 201, the control device 25 sets the cooling thermo-ON temperature and the heating thermo-ON temperature to temperatures manually set by the user, and proceeds to step 202.
As described in the first embodiment, the cooling thermo-ON temperature and the heating thermo-ON temperature may be automatically set by the control device 25 so as to interlock with the target temperature.

In step 202, the control device 25 determines whether or not the automatic setting of the cooling thermo OFF temperature and the heating thermo OFF temperature is set to ON.
If it is set to ON, it is determined in step 203 whether or not the cooling thermo OFF temperature and the heating thermo OFF temperature are initially set. If not, the cooling thermo OFF temperature is set in step 204. And the heating thermo OFF temperature are initialized, and the process proceeds to step 206.
In the initial setting, the control device 25 sets the cooling thermo OFF temperature and the heating thermo OFF temperature to, for example, the center temperature between the cooling thermo ON temperature and the heating thermo ON temperature.
If it is not set to ON, the process proceeds to step 205.

In step 205, the control device 25 sets the cooling thermo-OFF temperature and the heating thermo-OFF temperature to temperatures manually set by the user, and proceeds to step 206.
As described in the first embodiment, the cooling thermo OFF temperature and the heating thermo OFF temperature may be automatically set by the control device 25 so as to be interlocked with the target temperature.

In step 206, the control device 25 determines whether or not the temperature control of the temperature control system 21 is set to ON.
If it is not set to ON, it is determined in step 207 whether or not the cooling device 22 and the heating device 23 are in an operating state. In step 208, a stop command is transmitted to the operating device, and in step 206 Proceed to
If it is set to ON, the process proceeds to step 209.

In step 209, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 is higher than the cooling thermo ON temperature.
If the detected temperature of the air temperature detection device 24 is higher than the cooling thermo-ON temperature, it is determined in step 210 whether or not the cooling device 22 is in an operating state. An operation command is transmitted to the cooling device 22 in a stopped state, and the process proceeds to step 212.
Otherwise, go to step 217.

In step 212, the control device 25 determines whether or not the automatic setting of the cooling thermo-OFF temperature is set to ON.
If it is set to ON, the process proceeds to step 213.
If it is not set to ON, the process proceeds to step 206.

In step 213, the control device 25 determines whether or not the continuous time counted by the cooling thermo OFF time counting unit 25f is longer than a preset time Time-a.
When the continuous time counted by the cooling thermo-OFF time counting unit 25f is longer than the preset time Time-a, in step 214, the cooling thermo-OFF temperature is higher than the currently set temperature. And go to Step 206.
The control device 25 may set the temperature higher by a preset constant temperature, or may set the temperature higher by a temperature corresponding to how long the continuous time is.
Otherwise, go to step 215.

In step 215, the control device 25 determines whether or not the continuous time counted by the cooling thermo OFF time counting unit 25f is shorter than a preset time Time-b.
The preset time Time-b is shorter than the preset time Time-a.
If the continuous time counted by the cooling thermo-OFF time counting unit 25f is shorter than the preset time Time-b, in step 216, the cooling thermo-OFF temperature is lower than the currently set temperature. And go to Step 206.
The control device 25 may set the temperature lower by a preset constant temperature, or may set the temperature lower by a temperature corresponding to how short the continuous time is.
Otherwise, go to step 206.

In step 217, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 has become lower than the cooling thermo OFF temperature.
If the detected temperature of the air temperature detection device 24 is lower than the cooling thermo-OFF temperature, it is determined in step 218 whether or not the cooling device 22 is in operation, and in step 219, cooling of the operation state is performed. A stop command is transmitted to the device 22 and the counting of the continuous time of the cooling device 22 in the stopped state is started, and the process proceeds to Step 206.
Otherwise, go to step 220.

In step 220, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 is lower than the heating thermo ON temperature.
If the detected temperature of the air temperature detection device 24 is lower than the heating thermo ON temperature, it is determined in step 221 whether or not the heating device 23 is in an operating state. An operation command is transmitted to the heating device 23 in a stopped state, and the process proceeds to step 223.
Otherwise, go to step 228.

In step 223, the control device 25 determines whether or not the automatic setting of the heating thermo OFF temperature is set to ON.
If it is set to ON, the process proceeds to step 224.
If it is not set to ON, the process proceeds to step 206.

In step 224, the control device 25 determines whether or not the continuous time counted by the heating thermo OFF time counting unit 25g is longer than a preset time Time-c.
If the continuous time counted by the heating thermo OFF time counting unit 25g is longer than the preset time Time-c, in step 225, the heating thermo OFF temperature is lower than the currently set temperature. And go to Step 206.
The control device 25 may set the temperature lower by a preset constant temperature, or may set the temperature lower by a temperature corresponding to how long the continuous time is.
Otherwise, go to step 226.

In step 226, the control device 25 determines whether or not the continuous time counted by the heating thermo OFF time counting unit 25g is shorter than a preset time Time-d.
The preset time Time-d is a shorter time than the preset time Time-c.
When the continuous time counted by the heating thermo OFF time counting unit 25g is shorter than the preset time Time-d, in step 227, the heating thermo OFF temperature is higher than the currently set temperature. And go to Step 206.
The control device 25 may set the temperature higher by a preset constant temperature, or may set the temperature higher by a temperature corresponding to how short the continuous time is.
Otherwise, go to step 206.

In step 228, the control device 25 determines whether or not the detected temperature of the air temperature detecting device 24 has become higher than the heating thermo OFF temperature.
If the detected temperature of the air temperature detection device 24 is higher than the heating thermo OFF temperature, it is determined in step 229 whether or not the heating device 23 is in an operating state. A stop command is transmitted to the device 23, and the counting of the continuous time of the heating device 23 in the stopped state is started, and the process proceeds to Step 206.
Otherwise, go to step 206.

The control flows shown in FIGS. 6 and 7 are examples and may be changed as appropriate.
For example, the control device 25 may perform control by changing the order of step 209, step 217, step 220, and step 228.
For example, the control device 25 may perform control such that A provided before step 206 in FIG. 6 is provided before step 202.

<Operation of a refrigerated warehouse to which a temperature control system is applied>
Below, the effect | action of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 2 was applied is demonstrated.
8 and 9 are diagrams showing temperature changes in a refrigerated warehouse to which the temperature control system according to Embodiment 2 of the present invention is applied.
FIG. 8 shows a case where the outside air temperature is high, that is, the air temperature in the refrigerated warehouse 11 rises with the cooling device 22 and the heating device 23 stopped.
At the beginning (left side in the figure), the upward trend is weak, after that (middle in the figure), the upward trend is strong, and after that (right side in the figure), the upward trend is normal.
FIG. 9 shows a case where the outside air temperature is low, that is, the air temperature in the refrigerated warehouse 11 is lowered while the cooling device 22 and the heating device 23 are stopped.
The first (left side in the figure) shows a weak downward trend, the subsequent (middle in the figure) shows a strong downward trend, and the subsequent (right side in the figure) shows a normal downward trend.

  As shown in FIG. 8 and FIG. 9, the operating time of the cooling device 22 and the heating device 23 is shortened by the above-described configuration / operation when the rising / lowering tendency of the air temperature in the refrigerated warehouse 11 is weak, When the rising and falling tendency of the air temperature in the freezer / refrigerated warehouse 11 is strong, the cooling thermo-OFF temperature and the heating thermo-OFF temperature are optimized so that the operation time of the cooling device 22 and the heating device 23 becomes long.

That is, in the temperature control system 21, since the control device 25 has a function of automatically setting the cooling thermo OFF temperature and the heating thermo OFF temperature, the labor manually set by the user is reduced and the usability is improved.
Moreover, since the operating time of the cooling device 22 and the heating device 23 is optimized, useless operation is reduced and energy saving is improved.

  Moreover, since the temperature control system 21 makes the setting ranges of the cooling thermo OFF temperature and the heating thermo OFF temperature narrow by preset temperatures Temp-a and Temp-b, the cooling device 22 and the heating device 23 are frequently used. It is prevented that the cooling thermo OFF temperature and the heating thermo OFF temperature are set in such a state that the operation and the stop are repeatedly performed.

(Modification)
In the temperature control system 21, the continuous time in the stopped state of the cooling device 22 and the heating device 23 is compared with preset times Time-a, Time-b, Time-c, and Time-d. The continuous time of the operating state of the heating device 23 may be compared with a preset time.
As shown in FIG. 8 and FIG. 9, the relationship between the strength of the rising / decreasing tendency of the air temperature in the refrigerated warehouse 11 and the continuous time of the operating state of the cooling device 22 and the heating device 23 is as follows: Compared with the relationship between the strength of the rising / lowering tendency of the air temperature in the warehouse 11 and the continuous time of the cooling device 22 and the heating device 23 in the stop state, the relationship is reversed.
Therefore, in such a case, the control device 25 sets the cooling thermo-OFF temperature to be low and the heating thermo-OFF temperature to be high if the continuous time of the operating state of the cooling device 22 and the heating device 23 is long. If the continuous time of the operating state of the apparatus 22 and the heating apparatus 23 is short, the cooling thermo OFF temperature is set high, and the heating thermo OFF temperature is set low.
Note that the control device 25 uses both the continuous time in the stopped state of the cooling device 22 and the heating device 23 and the continuous time in the operating state of the cooling device 22 and the heating device 23, that is, using two indexes. The cooling thermo OFF temperature and the heating thermo OFF temperature may be set.

  In the temperature control system 21, the control device 25 sets both the cooling thermo OFF temperature and the heating thermo OFF temperature, but the control device 25 sets only one of the cooling thermo OFF temperature and the heating thermo OFF temperature. May be.

Embodiment 3 FIG.
A refrigerated warehouse to which the temperature control system according to Embodiment 3 is applied will be described.
In the following description, descriptions that overlap or are similar to those in Embodiments 1 and 2 are simplified or omitted as appropriate.

<Configuration of refrigerated warehouse to which temperature control system is applied>
Below, the structure of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 3 was applied is demonstrated.
FIG. 10 is a diagram showing a system configuration of a refrigerated warehouse to which the temperature control system according to Embodiment 3 of the present invention is applied.
As shown in FIG. 10, a plurality of control devices 25 are connected to the management terminal 26.
The plurality of control devices 25 and the management terminal 26 may be directly connected via a communication line, or may be connected via a communication line (such as a modem) via a public line network such as a LAN or a public telephone line.
The management terminal 26 may be a PC, and the number of control devices 25 connected to the management terminal 26 may be one.
The management terminal 26 corresponds to a “control unit” in the present invention.

As shown in FIG. 5, each control device 25 has a cooling thermo OFF time counting unit 25f and a heating thermo OFF time counting unit 25g, and can automatically set the cooling thermo OFF temperature and the heating thermo OFF temperature.
Regardless of whether or not the automatic setting of the cooling thermo OFF temperature and the heating thermo OFF temperature is set to ON, each control device 25 continues the continuous time of the cooling device 22 in the stop state and the continuous state of the heating device 23 in the stop state. And the set value when the cooling thermo OFF temperature and the heating thermo OFF temperature are automatically set is calculated.
When the automatic setting of the cooling thermo OFF temperature and the heating thermo OFF temperature is set to ON, each control device 25 sets the calculated set value, and automatically sets the cooling thermo OFF temperature and the heating thermo OFF temperature. If is not set to ON, the calculated set value is not set.

  Each control device 25 includes a detection temperature of the air temperature detection device 24, a setting value (manual setting value) of the cooling thermo ON temperature, a setting value (manual setting value or automatic setting value) of the cooling thermo OFF temperature, and a heating thermo ON temperature. Setting value (manual setting value), heating thermo OFF temperature setting value (manual setting value or automatic setting value), cooling thermo OFF temperature and information on whether automatic setting of heating thermo OFF temperature is set to ON, cooling When the automatic setting of the thermo OFF temperature and the heating thermo OFF temperature is not set to ON, the above-described calculated setting value and the like are transmitted to the management terminal 26.

The management terminal 26 sets the detection temperature of the air temperature detection device 24, the setting value of the cooling thermo ON temperature (manual setting value), the setting value of the cooling thermo OFF temperature (manual setting value or automatic setting value), and the setting of the heating thermo ON temperature. Value (manual setting value), heating thermo OFF temperature setting value (manual setting value or automatic setting value), cooling thermo OFF temperature and information on whether automatic setting of heating thermo OFF temperature is set to ON, cooling thermo When the automatic setting of the OFF temperature and the heating thermo OFF temperature is not set to ON, the calculated setting value and the like described above are recorded in the recording unit 26a and displayed on the display unit 26b.
The management terminal 26 displays the calculated trend of the set value, that is, the set value in time series or converted into a statistical value such as an average value on the display unit 26b.

The management terminal 26 detects that the detected temperature of the air temperature detection device 24 is lower than the set value (manual set value or automatic set value) of the cooling thermo OFF temperature, and sets the set value (manual set value or automatic) of the heating thermo OFF temperature. If it is higher than the set value), the display unit 26b displays that the energy is being saved.
In addition, the management terminal 26 displays the recorded detected temperature of the air temperature detecting device 24, the time zone during which energy was being saved, the total time, and the like, for example, with a graph.

The management terminal 26 includes a target temperature setting unit 26c, a cooling thermo ON temperature setting unit 26d, a cooling thermo OFF temperature setting unit 26e, a heating thermo ON temperature setting unit 26f, a heating thermo OFF temperature setting unit 26g, and the like.
The user can manually set the target temperature, the cooling thermo-ON temperature, the cooling thermo-OFF temperature, the heating thermo-ON temperature, and the heating thermo-OFF temperature via the management terminal 26.
The management terminal 26 transmits the set temperature to each control device 25, and each control device 25 controls the operating / stopped states of the cooling device 22 and the heating device 23 based on the set temperature. .

<Operation of a refrigerated warehouse to which a temperature control system is applied>
Below, the effect | action of the freezer refrigerator warehouse to which the temperature control system which concerns on Embodiment 3 was applied is demonstrated.
In the temperature control system 21, the display unit 26 b of the management terminal 26 displays information related to energy saving, that is, information based on whether or not both the cooling device 22 and the heating device 23 are in a stopped state. It is possible to recognize the effect.

In the temperature control system 21, the control device 25 automatically sets the cooling thermo OFF temperature and the heating thermo OFF temperature regardless of whether the automatic setting of the cooling thermo OFF temperature and the heating thermo OFF temperature is set to ON. The setting value in the case is calculated, and the display unit 26b of the management terminal 26 displays the calculated setting value.
Therefore, the user can recognize the strength of the rising / lowering tendency of the air temperature in the refrigerated warehouse 11 by monitoring the calculated set value.
Also, it is determined whether the cooling thermo OFF temperature and the heating thermo OFF temperature are appropriately set by comparing the set cooling thermo OFF temperature and heating thermo OFF temperature with the calculated set values. The optimum setting can be performed while viewing the calculated set value.

While the first to third embodiments have been described above, the present invention is not limited to the description of each embodiment.
For example, it is also possible to combine each embodiment or each modification.

  DESCRIPTION OF SYMBOLS 11 Refrigerated warehouse, 12 Opening and closing door, 13 Load, 21 Temperature control system, 22 Cooling device, 23 Heating device, 24 Air temperature detection device, 25 Control device, 26 Management terminal, 25a, 26c Target temperature setting part, 25b, 26d Cooling thermo ON temperature setting unit, 25c, 26e Cooling thermo OFF temperature setting unit, 25d, 26f Heating thermo ON temperature setting unit, 25e, 26g Heating thermo OFF temperature setting unit, 25f Cooling thermo OFF time counting unit, 25g Heating thermo OFF time Counting unit, 26a recording unit, 26b display unit.

Claims (11)

A cooling means for cooling the temperature controlled object;
Heating means for heating the object to be heated;
Temperature detecting means for detecting the temperature of the temperature adjustment target;
Control means for controlling the operation of the cooling means and the heating means;
With
When the detected temperature of the temperature detecting means is higher than the first reference temperature that is higher than the target temperature of the temperature adjustment target, the control means puts the cooling means into operation, and the detected temperature is When the temperature is lower than the second reference temperature, which is lower than the first reference temperature, the cooling means is stopped, and the detected temperature is lower than the third reference temperature, which is lower than the target temperature. The heating unit is put into an operating state, and when the detected temperature is higher than a fourth reference temperature that is higher than the third reference temperature, the heating unit is stopped.
A temperature control system characterized by that. The second reference temperature is higher than the fourth reference temperature;
The temperature control system according to claim 1. The control means sets the second reference temperature based on a continuous time of at least one of a stopped state and an operating state of the cooling means, and the fourth reference temperature is set to the heating means. Performing at least one of setting the continuous time of at least one of the stopped state and the operating state of
The temperature control system according to claim 1, wherein the system is a temperature control system. The second reference temperature is set to a temperature lower than a temperature that is lower by a preset first temperature than the first reference temperature,
The fourth reference temperature is set to a temperature that is higher than a temperature that is higher by a preset second temperature than the third reference temperature.
The temperature control system according to claim 3. At least one of the first reference temperature, the second reference temperature, the third reference temperature, and the fourth reference temperature is arbitrarily set and changed.
The temperature control system according to any one of claims 1 to 4, wherein The control means includes a display unit.
The temperature control system according to any one of claims 1 to 5, wherein The control means calculates at least one of the second reference temperature and the fourth reference temperature,
The display unit displays information based on a result of the calculation.
The temperature control system according to claim 6. The display unit displays information based on whether or not both the cooling unit and the heating unit are in a stopped state.
The temperature control system according to claim 6 or 7, wherein The cooling means and the heating means are plural,
The control means controls operations of the plurality of cooling means and the plurality of heating means;
The temperature control system according to any one of claims 1 to 8, wherein The control means has a management terminal for operation and monitoring,
The temperature control system according to any one of claims 1 to 9, wherein A control method for a temperature control system, comprising: a cooling unit that cools a temperature adjustment target; a heating unit that heats the temperature adjustment target; and a temperature detection unit that detects a temperature of the temperature control target. ,
When the detected temperature of the temperature detecting means is higher than the first reference temperature which is higher than the target temperature to be controlled, the cooling means is put into operation, and the detected temperature is the first reference temperature. When the temperature is lower than the lower second reference temperature, the cooling means is stopped, and when the detected temperature is lower than the third reference temperature lower than the target temperature, the heating means is When the operating state is set, and the detected temperature is higher than the fourth reference temperature, which is higher than the third reference temperature, the heating means is stopped.
And a temperature control system control method.

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