JP2017161091A - Air conditioning control system and air conditioning control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict increasing of indoor temperature in a space to be controlled when a cooling load is applied under a heating mode.SOLUTION: There is provided an integrated controller 7 in addition to a controller 3 for a building. The integrated controller 7 changes an operation mode of an outdoor air conditioning unit 2 to an air blowing mode when a space 4 to be controlled shows a cooling load under a heating mode. In this case, a changing to the air blowing mode is not carried out until a cooling load becomes a first threshold th1 or more. When the cooling load is present between the first threshold th1 and a second threshold th2 (th2>th1), it is determined whether or not a humidifying load for the space 4 to be controlled is present and when it is determined that no humidifying load is present, it is changed to the air blowing mode and in turn when it is determined that the humidifying load is present, changing into the air blowing mode is not carried out, but an outdoor air conditioning unit temperature set value tGsp is changed based on a value of the humidifying load at that time. When the cooling load becomes the second threshold th2 or more, the operation mode is changed to the air blowing mode irrespective of presence or absence of the humidifying load.SELECTED DRAWING: Figure 1

Description

  The present invention uses an indoor unit that harmonizes the intake air from the control target space and supplies it to the control target space, and an external air conditioner that adjusts the temperature and humidity of the intake air from the outside air and supplies the air to the control target space. The present invention relates to an air conditioning control system and an air conditioning control method.

  Conventionally, in small and medium-sized buildings, etc., the indoor unit (indoor unit that processes indoor air) that supplies intake air from the controlled space in a coordinated manner and the temperature and humidity of the intake air from outside air are adjusted. Thus, an air conditioning control system using an external air conditioner that supplies air to a control target space (an external air conditioner that takes outside air and processes it to an appropriate temperature and humidity) is used. An air conditioning control system using such an indoor unit and an external air conditioner is called a multi air conditioning system for buildings (see, for example, Patent Document 1).

  In this multi air conditioning system for buildings, the external air conditioner has a total heat exchanger, a direct expansion coil unit (fan + direct expansion coil), and a humidifier, and the intake air from the outside air is controlled by the total heat exchanger. Heat is exchanged with the return air from the air (exhaust to the outside air), cooled or heated by the direct expansion coil unit, then humidified by a humidifier as necessary, and supplied to the control target space.

  FIG. 8 shows a configuration of a main part of a conventional building multi-air conditioning system 200. In the figure, 1 is an indoor unit, 2 is an external conditioner, 3 is a control device (building multi-controller) for controlling the operation of the indoor unit 1 and the external conditioner 2, and 4 is a space to be controlled.

  In this multi air conditioning system for buildings 200, the indoor unit 1 includes a cooling / heating coil 1-1 and a fan 1-2, and cools or heats the return air from the control target space 4 and controls it as harmonized air. Supply to the target space 4.

  In this multi-air conditioning system for buildings 200, the external air conditioner 2 includes a total heat exchanger 2-1, a direct expansion coil unit 2-2, and a humidifier 2-3, and performs total heat exchange of intake air from the outside air. Heat is exchanged between the return air from the controlled space 4 (exhaust to the outside air) in the vessel 2-1, and cooling or heating is performed in the direct expansion coil unit 2-2. The direct expansion type coil unit 2-2 includes a direct expansion coil 2-21 and a fan 2-22. The air cooled or heated by the direct expansion coil unit 2-2 is humidified by the humidifier 2-3 as necessary, and supplied to the control target space 4.

  Note that the refrigerant from the outdoor unit (not shown) is supplied through the refrigerant pipe L to the cooling / heating coil 1-1 in the indoor unit 1 and the direct expansion coil 2-21 in the external conditioner 2. The control target space 4 is provided with an indoor temperature sensor 5 that detects the temperature in the control target space 4 as the indoor temperature trpv, and an indoor humidity sensor 6 that detects the humidity in the control target space 4 as the indoor humidity hrpv. It has been.

  In addition, the external air conditioner 2 uses the air from the total heat exchanger 2-1 to the direct expansion coil unit 2-2 as external air intake air, and detects the temperature tSpv of the external air intake air. An air conditioner intake air temperature sensor 2-4, and an external air conditioner return air temperature sensor 2-5 that detects the temperature tRpv of the external air conditioner return air using the return air from the control target space 4 as an external air conditioner return air; Is provided.

  In the building multi-air conditioning system 200, the operations of the indoor unit 1 and the external air conditioner 2 are controlled by the building multi-controller 3. In the building multi-controller 3, the operation mode of the indoor unit 1 and the external air conditioner 2 is set by a user (resident or facility manager). That is, the operation mode designated by the user is set in the building multi-controller 3. Usually, the cooling mode is set in summer and the heating mode is set in winter.

  Further, in the building multi-controller 3, a user sets a set value (indoor temperature set value) trsp of the room temperature and a set value (indoor humidity set value) hrsp of the room humidity for the control target space 4. The building multi-controller 3 has a temperature setting value for preventing the load of the outside air from affecting the indoor temperature of the control target space 4 when introducing the outside air into the control target space 4. It is set as the temperature set value tGsp. For example, when the indoor unit 1 is in a cooling operation and has a humidification load, the external air conditioner temperature set value tGsp is determined from the indoor humidity hrpv detected by the indoor humidity sensor 6. When the indoor unit 1 is in a proper heating operation (with heating load), it is determined from the deviation between the room temperature trpv detected by the room temperature sensor 5 and the room temperature set value trsp.

  When the cooling mode is set, the building multi-controller 3 sets a difference ΔtrC = trpv−trsp between the room temperature trpv detected by the room temperature sensor 5 and the room temperature set value trsp as a cooling load (ΔtrC> 0) The operation of the indoor unit 1 is controlled so that the temperature trpv matches the indoor temperature set value trsp. Further, based on the temperature tSpv of the external air intake air detected by the external air intake air temperature sensor 2-4, the temperature of the air blown out from the direct expansion coil unit 2-2 becomes the external air temperature setting value tGsp. The operation of the external air conditioner 2 is controlled so that

  When the heating mode is set, the building multi-controller 3 sets the difference ΔtrH = trsp−trpv between the room temperature trpv detected by the room temperature sensor 5 and the room temperature set value trsp as a heating load (ΔtrH> 0), The operation of the indoor unit 1 is controlled so that the temperature trpv matches the indoor temperature set value trsp. Further, based on the temperature tSpv of the external air intake air detected by the external air intake air temperature sensor 2-4, the temperature of the air blown out from the direct expansion coil unit 2-2 becomes the external air temperature setting value tGsp. The operation of the external air conditioner 2 is controlled so that Further, the humidifier 2-3 is turned on, and the amount of steam (humidification amount) sprayed by the humidifier 2-3 is adjusted so that the indoor humidity hrpv detected by the indoor humidity sensor 6 matches the indoor humidity set value hrsp. Control.

  In this multi-air conditioning system for buildings 200, if the internal load of the control target space 4 is large, the cooling load may become even in winter. That is, when the operation mode of the indoor unit 1 and the external air conditioner 2 is set to the heating mode, the indoor temperature trpv detected by the indoor temperature sensor 5 may be higher than the indoor temperature set value trsp. In many cases, this is caused by the high airtightness of buildings in recent years or an increase in heat load caused by IoT (Internet of Things) equipment. In this case, the building multi-controller 3 sets the indoor unit 1 to the air blowing operation.

JP 2010-117084 A

  However, at the time of the cooling load in the heating mode, the building multi-controller 3 causes the indoor unit 1 to perform the air blowing operation, but the external air conditioner 2 continues the operation in the heating mode. That is, the control is continued such that the temperature of the air blown from the direct expansion coil unit 2-2 becomes the external air conditioner temperature set value tGsp. For this reason, depending on the external air conditioner temperature setting value tGsp, even if the control target space 4 is in the cooling load, warm air (= air having a temperature higher than the indoor temperature setting value trsp) is supplied. The temperature is further raised.

  That is, in the conventional multi air conditioning system for buildings 200, when the operation mode of the indoor unit 1 and the external air conditioner 2 is the heating mode, the indoor unit 1 is in the air blowing operation when the control target space 4 becomes a cooling load. However, the external air conditioner 1 may be in a heating operation, resulting in a problem that the indoor temperature of the control target space 4 increases.

  The present invention has been made in order to solve such a problem, and an object of the present invention is to provide an air conditioning control capable of suppressing an increase in the indoor temperature of the control target space during a cooling load in the heating mode. A system and an air conditioning control method are provided.

  In order to achieve such an object, the present invention includes an indoor unit (1) that harmonizes intake air from the control target space (4) and supplies the intake air to the control target space (4), and a temperature of the intake air from the outside air. Air conditioning control comprising an external air conditioner (2) that adjusts the humidity and supplies it to the controlled space (4), and a controller (3) that controls the operation of the indoor unit (1) and the external air conditioner (2) In the system, when the operation mode of the indoor unit (1) and the external air conditioner (2) in the control device (3) is the heating mode, if the control target space (4) is a cooling load, the control device (3 The external air conditioner operation mode changing means (7) for changing the operation mode of the external air conditioner (2) to an air blowing mode for directly supplying the intake air from the outside air to the control target space (4) is provided. And

  According to this invention, when the operation mode of the indoor unit (1) and the external air conditioner (2) is the heating mode, the external air conditioner (2) when the control target space (4) becomes a cooling load. The operation mode is changed to the air blowing mode. As a result, during the cooling load in the heating mode, the intake air from the outside air is directly sent to the control target space (4), that is, the outside air that has not been subjected to temperature adjustment or humidity adjustment is directly transferred to the control target space. (Substantially no external air conditioner temperature set value and room humidity set value), and the intake air from the outside air (cold outside air) sent directly (cold outside air) is sent to (4). ) Is prevented from rising.

  In the present invention, when the cooling load occurs during the heating mode, the operation mode of the external air conditioner (2) is changed to the air blowing mode. However, the first threshold value and the second threshold value (second threshold value> first threshold value) When the cooling load is between the first threshold value and the second threshold value without changing to the air blowing mode until the cooling load becomes equal to or higher than the first threshold value, the control target space (4 ), If there is no humidification load, change to the ventilation mode. If it is determined that there is a humidification load, do not change to the ventilation mode. The machine temperature set value is changed according to the magnitude of the humidification load at that time, and when the cooling load becomes the second threshold value or more, the change to the air blowing mode is performed regardless of the presence or absence of the humidification load. You may do it.

  Moreover, the 1st heating mode which permits the change to the ventilation mode by the external air conditioner operation mode change means (7) as an operation mode which can be set to a control apparatus (3), and an external air conditioner operation mode change means You may make it show to a user so that selection of the 2nd heating mode which does not permit the change to the ventilation mode by (7) is possible. In this case, the first heating mode is also presented to the user that there is a possibility that cold air may be emitted.

  In the above description, as an example, constituent elements on the drawing corresponding to the constituent elements of the invention are indicated by reference numerals with parentheses.

  According to the present invention, when the operation mode of the indoor unit and the external air conditioner is the heating mode, when the controlled space is a cooling load, the operation mode of the external air conditioner is changed to the air blowing mode. In the cooling load during the heating mode, the intake air from the outside air is directly sent to the control target space, thereby suppressing an increase in the indoor temperature of the control target space.

FIG. 1 is a diagram showing a configuration of a main part of an air conditioning control system (building multi-air conditioning system) according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a case where the cooling load in the heating mode is in the first stage (when the room temperature is slightly high). FIG. 3 is a diagram illustrating a case where the cooling load in the heating mode is in the second stage (when the room temperature is high). FIG. 4 is a diagram illustrating a case where the cooling load in the heating mode is in the third stage (when the room temperature is very high). FIG. 5 is a diagram for explaining the details of the operation of the building multi-controller according to the change command from the integrated controller when the cooling load in the heating mode is in the second stage (when the room temperature is high). FIG. 6 is a diagram showing changes in temperature and humidity of air during vaporization humidification. FIG. 7 shows the main part of the multi-air conditioning system for buildings provided with an operation mode presenting section that presents the user with a selection of the first heating mode (with the possibility of cold air) and the second heating mode (normal). FIG. FIG. 8 is a diagram showing a configuration of a main part of a conventional multi air conditioning system for buildings.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a main part of an air conditioning control system (a building multiple air conditioning system) 100 according to an embodiment of the present invention. In this figure, the same reference numerals as those in FIG. 8 denote the same or equivalent components as those described with reference to FIG.

  In this building multi-air conditioning system 100, an integrated controller 7 is provided separately from the building multi-controller 3, and information is exchanged between the integrated controller 7 and the building multi-controller 3.

  In the present embodiment, the building multi-controller 3 and the integrated controller 7 are realized by hardware including a processor and a storage device, and a program that realizes various functions in cooperation with these hardware. Hereinafter, the functions of the integrated controller 7 will be described with reference to operations on the building multi-controller 3 side.

  When the operation mode of the indoor unit 1 and the external air conditioner 2 in the building multi-controller 3 is the heating mode, the integrated controller 7 performs the external adjustment in the building multi-controller 3 when the controlled space 4 is a cooling load. The operation mode of the machine 2 has a function of changing to a ventilation mode (a mode in which intake air from outside air is directly supplied to the control target space). This function will be specifically described below.

  The integrated controller 7 receives the current operation mode of the indoor unit 1 and the external air conditioner 2, the current indoor temperature setting value trsp, and the current indoor humidity setting value hrsp from the building multi-controller 3.

  The integrated controller 7 determines whether the current operation mode of the indoor unit 1 and the external air conditioner 2 is the heating mode from the current operation mode of the indoor unit 1 and the external air conditioner 2 sent from the building multi-controller 3. Determine whether. Here, if it is determined that the heating mode is set, the integrated controller 7 determines whether or not the control target space 4 is a cooling load.

  Based on the indoor temperature set value trsp sent from the building multi-controller 3 and the indoor temperature tpv of the controlled space 4 detected by the indoor temperature sensor 5, the integrated controller 7 determines that the controlled space 4 is a cooling load. Judge whether there is. In this case, a difference ΔtrH (ΔtrH = trsp−trpv) between the room temperature trpv detected by the room temperature sensor 5 and the room temperature set value trsp is obtained, and if the difference ΔtrH is ΔtrH <0, the cooling load is assumed. to decide.

  Here, when it is determined that the cooling load is present, that is, when it is determined that the cooling load is generated in the heating mode, the integrated controller 7 determines the magnitude of the cooling load. In this case, the magnitude of the cooling load is divided into three stages based on the difference between the room temperature trpv and the room temperature set value trsp. And according to the magnitude | size of the cooling load divided into these three steps, the change instruction | command to the multi controller 3 for buildings is produced | generated.

[First stage]
The integrated controller 7 sets the indoor temperature set value trsp + 2 ° C. as the first threshold th1 (see FIG. 2), and when the indoor temperature trpv is trsp <trpv <trsp + 2 ° C. (when the indoor temperature is slightly high), the cooling load is large. Is determined to be in the first stage.

  If the integrated controller 7 determines that the cooling load is in the first stage, it does nothing. That is, a change command is not sent to the building multi-controller 3, and the normal heating operation by the building multi-controller 3 is continued.

[Second stage]
The integrated controller 7 sets the indoor temperature set value trsp + 4 ° C. as the second threshold th2 (see FIG. 3), and when the indoor temperature trpv is trsp + 2 ° C. ≦ trpv <trsp + 4 ° C. (when the indoor temperature is high), the cooling load is large. Is determined to be in the second stage.

  If the integrated controller 7 determines that the cooling load is in the second stage, the integrated controller 7 determines whether there is a humidification load in the control target space 4. Here, when it is determined that there is no humidification load, a command to change to the ventilation mode is sent to the building multi-controller 3, and when it is determined that there is a humidification load, the building multi-controller 3 is switched to the ventilation mode. A change command is not sent, but a command to change the external controller temperature set value tGsp according to the magnitude of the humidifying load at that time is sent to the building multi-controller 3.

  The integrated controller 7 determines whether or not there is a humidification load in the control target space 4 based on the indoor humidity set value hrsp sent from the building multi-controller 3 and the indoor humidity of the control target space 4 detected by the indoor temperature sensor 5. based on hrpv. That is, the difference ΔhrH (ΔhrH = hrsp−hrpv) between the indoor humidity hrpv and the indoor humidity set value hrsp is obtained. When it is 0, it is determined that there is no humidification load.

[Stage 3]
When the room temperature trpv is equal to or higher than the second threshold th2 (see FIG. 4), that is, the room temperature trpv is trsp + 4 ° C. ≦ trpv (when the room temperature is very high), the integrated controller 7 Regardless of the presence or absence of, the change command to the ventilation mode is sent to the multi controller 3 for buildings.

  The details of the operation of the building multi-controller 3 according to the change command from the integrated controller 7 when the cooling load in the cell mode is in the second stage (when the room temperature is high) will be described with reference to FIG. FIG. 5 (a) shows the ON / OFF state of the humidifier 2-3, FIG. 5 (b) shows the operation mode of the external air conditioner 2, and FIG. 5 (c) shows the change in the external air conditioner temperature set value tGsp. Indicates. In FIG. 5, the horizontal axis indicates the room humidity hrpv.

  The integrated controller 7 is in the case where the current operation mode of the indoor unit 1 and the external air conditioner 2 in the building multi-controller 3 is the heating mode, and the indoor temperature trpv is trsp + 2 ° C. ≦ trpv <trsp + 4 ° C. (when the indoor temperature is high). Based on the difference ΔhrH (ΔhrH = hrsp−hrpv) between the indoor humidity hrpv of the control target space 4 detected by the indoor humidity sensor 6 and the indoor humidity set value hrsp, the presence / absence of a humidification load in the control target space 4 is determined.

[With humidification load]
If ΔhrH is> 0, the integrated controller 7 determines that there is a humidification load, and does not send a change command to the blower mode to the building multi-controller 3, and the external controller temperature according to the magnitude of the humidification load at that time A command to change the set value tGsp is sent to the building multi-controller 3.

  In this case, the building multi-controller 3 sets the operation mode of the external air conditioner 2 to the heating mode so that the temperature of the air blown from the direct expansion coil unit 2-2 becomes the external air conditioner temperature set value tGsp. The operation of the air conditioner 2 is controlled. Further, the building multi-controller 3 turns on the humidifier 2-3, and the water vapor sprayed by the humidifier 2-3 so that the indoor humidity hrpv detected by the indoor humidity sensor 6 matches the indoor humidity set value hrsp. The amount of moisture (humidification amount) is controlled.

  Here, the integrated controller 7 changes the external air conditioner temperature set value tGsp so as to lower the external air conditioner temperature set value tGsp as the humidification load ΔhrH becomes smaller. That is, as the humidification load ΔhrH becomes smaller, the external air conditioner temperature set value tGsp is changed in a direction in which the amount of heating of the intake air from the outside air becomes smaller.

  Note that a set lower limit is set for the external air conditioner temperature set value tGsp, and the upper limit is a normal set value. That is, as described above, when the indoor unit 1 is in the cooling operation and has a humidification load, the external air conditioner temperature set value tGsp is determined from the indoor humidity hrpv detected by the indoor humidity sensor 6. When the indoor unit 1 is in a proper heating operation (with heating load), it is determined from the deviation between the room temperature trpv detected by the room temperature sensor 5 and the room temperature set value trsp. The determined external air conditioner temperature set value tGsp is a normal set value, and is the upper limit value of the external air conditioner temperature set value tGsp in this case.

  When the indoor humidity hrpv is much lower than the indoor humidity set value hrsp by the change command of the external controller temperature set value tGsp from the integrated controller 7, the external air conditioner temperature set value tGsp is increased and it becomes easy to get humidified. . Further, the temperature of the supply air from the external air conditioner 2 to the control target space 4 is suppressed by evaporative cooling by water spray humidification.

  Further, when the deviation between the indoor humidity hrpv and the indoor humidity set value hrsp is not so large, the external air conditioner temperature set value tGsp is lowered. In this case, although evaporative cooling due to water spray humidification is small, the temperature of the supply air from the external air conditioner 2 to the control target space 4 is suppressed by the decrease in the external air conditioner temperature setting value tGsp. In addition, it is necessary to humidify or prevent extreme heating when the humidification load is small.

[When there is no humidification load]
If ΔhrH is ≦ 0, the integrated controller 7 determines that there is no humidification load, and sends an instruction to change to the ventilation mode to the building multi-controller 3.

  In this case, the building multi-controller 3 switches the operation mode of the external air conditioner 2 from the heating mode to the air blowing mode. The building multi-controller 3 turns off the humidifier 2-3.

  As a result, the intake air from the outside air is directly sent to the control target space 4, that is, the outside air that has not been subjected to temperature adjustment or humidity adjustment is sent directly to the control target space 4 (substantially, The outside air temperature setting value tGsp and the room humidity setting value hsp) and the intake air from the outside air (cold outside air) sent directly to this control suppress the increase in the room temperature of the control target space 4. . In this case, an increase in the room temperature of the control target space 4 is not only suppressed, but depending on the room temperature, the room is cooled by effectively using cold outside air.

  FIG. 6 shows a change in temperature and humidity of air during vaporization humidification as a reference. In the same figure, P1 point is the temperature and humidity point (10 ° C, 30% RH (dew point: about -7 ° C)) of the outside air before total heat exchange, and P2 is the indoor temperature and humidity point (26 ° C, 40% RH). , P3 is the temperature / humidity point after total heat exchange, P4 is the temperature / humidity point when heated by the direct expansion coil (when the heating amount is not reduced), P5 is the temperature / humidity point when humidifying from P4 point, and P6 is the direct The temperature / humidity point when heated by the expansion coil (when the heating amount is reduced), and P7 is the temperature / humidity point when humidified from the P6 point. By reducing the amount of heating in the direct expansion coil, the amount of humidification is slightly reduced, but energy loss due to overheating is reduced. Further, if the room temperature decreases due to cooling, the relative humidity increases.

  In the above, the details of the operation of the building multi-controller 3 according to the change command when the cooling load in the heating mode from the integrated controller 7 is in the second stage (when the room temperature is high) are shown in FIG. However, at the time of a change command when the cooling load in the heating mode from the integrated controller 7 is in the third stage (when the room temperature is very high), the building multi-controller 3 is used regardless of the presence or absence of the humidifying load. A change command to the air blowing mode is sent to Thereby, the operation mode of the external air conditioner 2 is immediately switched from the heating mode to the air blowing mode, the humidifier 2-3 is turned off, and the intake air from the outside air is directly sent to the control target space 4, An increase in the indoor temperature of the control target space 4 is suppressed.

  In the above-described embodiment, even though the building multi-controller 3 is set to the heating mode, depending on the case, the cool air is emitted from the external air conditioner 2, which may be a claim.

  Therefore, the building multi-air conditioning system 101 shown in FIG. 7 is integrated with the first heating mode that permits the integrated controller 7 to change to the air blowing mode as an operation mode that can be set in the building multi-controller 3. An operation mode presentation unit 8 is provided that presents the user with a second heating mode that does not allow the controller 7 to change to the blowing mode. In addition, the operation mode presenting unit 8 presents to the user that there is a possibility that cold air may be generated in the first heating mode, and informs the user that the second heating mode is the normal heating mode. I try to present it.

  In the building multi-air conditioning system 101, when the user sets the heating mode in the building multi-controller 3, the user can know that there is a possibility that cold air may be generated in the first heating mode. Thus, it is possible to prevent the occurrence of complaints by allowing the user to recognize and allow the possibility of cold air.

  In the above-described embodiment, the temperature in the control target space 4 is detected as the indoor temperature trpv. However, the temperature of the return air returned to the indoor unit 1 may be detected as the indoor temperature trpv. . The same applies to the humidity, and the humidity of the return air returned to the indoor unit 1 may be detected as the indoor humidity hrpv.

  Further, in the above-described embodiment, the magnitude of the cooling load in the heating mode is divided into three stages, and the integrated controller 7 sends the building load to the building multi-controller 3 in accordance with the magnitude of the cooling load divided into the three stages. The change command is generated, but the size of the cooling load is not necessarily divided into three stages. For example, when a cooling load occurs, a command to immediately change the external air conditioner 2 to the blower mode is sent. May be.

[Extension of the embodiment]
The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the above embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the technical idea of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... External conditioner, 2-1 ... Total heat exchanger, 2-2 ... Direct expansion type coil unit (fan + direct expansion coil), 2-3 ... Humidifier, 3 ... Multi controller for buildings DESCRIPTION OF SYMBOLS 4 ... Control object space, 5 ... Indoor temperature sensor, 6 ... Indoor humidity sensor, 7 ... Integrated controller, 8 ... Operation mode presentation part, 100 ... Multi air conditioning system for buildings, 101 ... Multi air conditioning system for buildings

Claims (12)

An indoor unit that harmoniously supplies intake air from the control target space and supplies the air to the control target space, an external conditioner that adjusts the temperature and humidity of the intake air from outside air and supplies the air to the control target space, the indoor unit, and In an air conditioning control system comprising a control device for controlling the operation of the external air conditioner,
When the operation mode of the indoor unit and the external air conditioner in the control device is a heating mode, when the control target space is a cooling load, the operation mode of the external air conditioner in the control device is changed from the outside air. An air conditioning control system, comprising: an external air conditioner operation mode changing means for changing to an air blowing mode for directly supplying intake air to the control target space. In the air-conditioning control system according to claim 1,
The external air conditioner operation mode changing means is
The air-conditioning control system is characterized in that the air-conditioning control system is not changed until the cooling load becomes equal to or greater than a predetermined first threshold. In the air conditioning control system according to claim 2,
The external air conditioner operation mode changing means is
When the threshold value determined as a value larger than the first threshold value is the second threshold value, and the cooling load is between the first threshold value and the second threshold value, the humidification load of the control target space If it is determined that there is no humidification load, the change to the air blowing mode is performed. If it is determined that there is a humidification load, the external air conditioner is not changed to the air blowing mode. An air conditioning control system characterized in that an air conditioner temperature set value, which is a temperature set value for controlling the operation of the engine, is changed according to the humidifying load at that time. In the air conditioning control system according to claim 3,
The external air conditioner operation mode changing means is
When the cooling load is equal to or greater than the second threshold, the air-conditioning control system is configured to change to the air blowing mode regardless of the presence or absence of the humidifying load. In the air conditioning control system according to claim 3,
The external air conditioner operation mode changing means is
When it is determined that the cooling load is between the first threshold value and the second threshold value and there is a humidification load in the control target space, the intake air from the outside air is reduced as the humidification load decreases. The air conditioning control system characterized in that the temperature setting value of the external air conditioner is changed in a direction in which the amount of heating is reduced. In the air-conditioning control system described in any one of Claims 1-5,
A heating mode that can be set in the control device is a first heating mode that permits a change to the blower mode by the external air conditioner operation mode changing means, and an air blower mode by the external air conditioner operation mode changing means. An operation mode presenting means for selectively presenting to the user the second heating mode that does not allow the change;
The operation mode presenting means includes
The air conditioning control system characterized in that the first heating mode is also presented to the user that there is a possibility of cold air. An indoor unit that harmoniously supplies intake air from the control target space and supplies the air to the control target space, an external conditioner that adjusts the temperature and humidity of the intake air from outside air and supplies the air to the control target space, the indoor unit, and In an air conditioning control method applied to a system including a control device that controls the operation of the external air conditioner,
When the operation mode of the indoor unit and the external air conditioner in the control device is a heating mode, when the control target space is a cooling load, the operation mode of the external air conditioner in the control device is changed from the outside air. An air conditioning control method comprising: an external air conditioner operation mode changing step of changing to a blower mode in which intake air is directly supplied to the control target space. In the air-conditioning control method according to claim 7,
The external air conditioner operation mode change step includes:
The air conditioning control method is characterized by not changing to the air blowing mode until the cooling load is equal to or greater than a predetermined first threshold. In the air-conditioning control method according to claim 8,
The external air conditioner operation mode change step includes:
When the threshold value determined as a value larger than the first threshold value is the second threshold value, and the cooling load is between the first threshold value and the second threshold value, the humidification load of the control target space If it is determined that there is no humidification load, the change to the air blowing mode is performed. If it is determined that there is a humidification load, the external air conditioner is not changed to the air blowing mode. An air-conditioning control method characterized by changing an air conditioner temperature set value, which is a temperature set value for controlling the operation of the engine, in accordance with the magnitude of the humidifying load at that time. In the air-conditioning control method according to claim 9,
The external air conditioner operation mode change step includes:
When the cooling load is equal to or higher than the second threshold, the air-conditioning control method is characterized in that the mode is changed to the air blowing mode regardless of the presence or absence of the humidifying load. In the air-conditioning control method according to claim 9,
The external air conditioner operation mode change step includes:
When it is determined that the cooling load is between the first threshold value and the second threshold value and there is a humidification load in the control target space, the intake air from the outside air is reduced as the humidification load decreases. The air conditioning control method, wherein the external controller temperature setting value is changed in a direction in which the heating amount decreases. In the air-conditioning control method described in any one of Claims 7-11,
A heating mode that can be set in the control device is a first heating mode that permits a change to the blower mode by the external air conditioner operation mode change step, and an air blow mode by the external air conditioner operation mode change step. An operation mode presenting step for selectively presenting to the user a second heating mode that does not allow a change;
The operation mode presentation step includes:
The air conditioning control method, wherein the first heating mode is also presented to the user that there is a possibility of cold air.

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