JP2017142003A - Air-conditioning control system and air-conditioning control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve energy saving effect by coordinating switching of a mode (heat exchange mode/bypass mode) in a total enthalpy heat exchange device and switching of an operation mode (cooling mode/air blowing mode) in an air conditioner.SOLUTION: When an outside air temperature tout becomes lower than an indoor temperature trpv, and temperature difference Δt1 between the outside air temperature tout and the indoor temperature trpv is a minimum temperature difference or more, a mode of a total enthalpy heat exchange device 2A is switched from a heat exchange mode to a bypass mode. When the mode of the total enthalpy heat exchange device 2A is switched to the bypass mode, difference between the indoor temperature trpv and a cooling set temperature trsp is determined as an indoor temperature difference Δt2, and an operation mode of an air conditioner 1 is set to an air blowing mode, when the indoor temperature difference Δt2 is within a set value reduction width.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air-conditioning control system and an air-conditioning control method using a total heat exchange device that exchanges heat between exhaust air from the control target space and outside air, and an air conditioner that supplies conditioned air to the control target space. About.

  2. Description of the Related Art Conventionally, facilities such as buildings have used air conditioning control systems that have improved energy saving (hereinafter abbreviated as energy saving) by taking in outside air heat.

  This air conditioning control system includes a total heat exchange device that exchanges heat between the exhaust from the control target space and the outside air, and an air conditioner that supplies conditioned air to the control target space. In order to improve the performance, when the temperature of the outside air is low, the outside air is used for cooling (for example, see Patent Document 1).

  FIG. 6 shows an outline of a conventional air conditioning control system 200. In the figure, 1 is an air conditioner, 2 is a total heat exchange device, 3 is an air conditioning control device, 4 is a controlled space, 5 is an indoor temperature sensor that detects the temperature of the controlled space 4 as an indoor temperature trpv, and 6 is all An outside air temperature sensor that detects the temperature of the outside air OA before being taken into the heat exchange device 2 as the outside air temperature tout, and 7 is an indoor temperature setting device that sets the set value of the room temperature when performing cooling as the cooling set temperature trsp. .

  In this air conditioning control system 200, the total heat exchange device 2 includes a total heat exchanger (HEX), and outputs a heat exchange mode in which the outside air OA that has been heat exchanged with the exhaust EXA from the control target space 4 is output. And a bypass mode in which the outside air OA is output as it is without performing heat exchange with the exhaust EXA from the control target space 4. In this example, the total heat exchange device 2 switches the mode of the total heat exchange device 2 from the heat exchange mode to the bypass mode when the outside air temperature tout is low by the automatic operation function.

  The air conditioner 1 receives the return air RA from the control target space 4 and the outside air OA from the total heat exchange device 2 as inputs, and supplies conditioned air (conditioned air) SA to the control target space 4. That is, the air conditioning control device 3 adjusts the temperature and the air flow rate of the conditioned air SA from the air conditioner 1 to the control target space 4 so that the room temperature trpv and the cooling set temperature trsp match.

JP 2004-132669 A

  However, in this air conditioning control system 200, the total heat exchange device 2 and the air conditioner 1 operate individually, and there is a problem that the cooperation is insufficient.

  That is, the total heat exchange device 2 operates by switching the mode between the heat exchange mode and the bypass mode by the automatic operation function. The air conditioner 1 is operated so that the room temperature trpv and the cooling set temperature trsp match regardless of the switching state (heat exchange mode, bypass mode) of the total heat exchanger 2. For this reason, there is a possibility that the air conditioner 1 continues to operate in the cooling mode despite the cold outside air being taken in, and energy is wasted.

  The present invention has been made to solve such a problem, and the object of the present invention is to switch the mode (heat exchange mode / bypass mode) in the total heat exchanger and the operation mode (cooling mode) in the air conditioner. The purpose of the present invention is to provide an air-conditioning control system and an air-conditioning control method capable of obtaining a greater energy saving effect in cooperation with the switching of the / air blowing mode.

  In order to achieve such an object, the present invention performs heat exchange between a heat exchange mode for outputting outside air heat-exchanged with the exhaust from the control target space and the exhaust from the control target space. The conditioned air is supplied to the control target space by inputting the total heat exchange device having a bypass mode for outputting the outside air as it is and the return air from the control target space and the outside air from the total heat exchange device. An air conditioning control system comprising: an air conditioner; and an air conditioning control device that controls switching between a heat exchange mode and a bypass mode in the total heat exchange device and an operation mode switching in the air conditioner. The room temperature detecting means for detecting the temperature of the outdoor air as the room temperature and the outside air temperature detecting means for detecting the temperature of the outside air before being input to the total heat exchange device as the outside air temperature. Cooling set temperature storage means for storing the set temperature set value during cooling as the cooling set temperature, and the lowest temperature at which the outside air temperature is lower than the room temperature and the temperature difference between the outside air temperature and the room temperature is predetermined. When the temperature difference is greater than or equal to the temperature difference, the total heat exchanger mode switching means for switching the mode of the total heat exchanger from the heat exchange mode to the bypass mode, and the room temperature when the mode of the total heat exchanger is switched to the bypass mode. The difference between the cooling temperature and the cooling set temperature is obtained as a room temperature difference. If the room temperature difference is within the set value relaxation range determined as the allowable temperature difference, the air conditioner operation mode is set to the air blowing mode, and the room temperature is Air conditioner operation mode switching means for setting the operation mode of the air conditioner to the cooling mode when the indoor temperature difference is higher than the cooling set temperature and is outside the set value relaxation range. To.

  In this invention, the air conditioning control device changes the mode of the total heat exchange device from the heat exchange mode to the bypass mode when the outside air temperature is lower than the room temperature and the temperature difference between the outside air temperature and the room temperature is equal to or greater than the minimum temperature difference. Switch to. At this time, the air conditioning control device obtains the difference between the room temperature and the cooling set temperature as the room temperature difference, and when the room temperature difference is within the set value relaxation range, the air conditioner operation mode is set as the air blowing mode. When the temperature is higher than the cooling set temperature and the indoor temperature difference is outside the set value relaxation range, the operation mode of the air conditioner is set to the cooling mode. As a result, when the outside air temperature decreases and the total heat exchanger is switched to the bypass mode, if the indoor temperature difference is within the set value relaxation range, the operation mode of the air conditioner is set to the blow mode, and the air conditioner is useless. Driving is avoided.

  According to the present invention, when the outside air temperature is lower than the room temperature and the temperature difference between the outside temperature and the room temperature is equal to or greater than the minimum temperature difference, the mode of the total heat exchange device is switched from the heat exchange mode to the bypass mode. When the mode of the total heat exchanger is switched to the bypass mode, the difference between the room temperature and the cooling set temperature is obtained as the room temperature difference, and if this room temperature difference is within the set value relaxation range, air conditioning is performed. Air conditioner operation mode is set to air blow mode, and when the room temperature is higher than the cooling set temperature and the room temperature difference is outside the set value relaxation range, the air conditioner operation mode is set to cooling mode. When the total heat exchanger is switched to the bypass mode, if the indoor temperature difference is within the set value relaxation range, the operation mode of the air conditioner is set to the blow mode. Thereby, useless operation of the air conditioner can be avoided, and a greater energy saving effect can be obtained.

FIG. 1 is a diagram showing a main part of an air conditioning control system according to an embodiment of the present invention. FIG. 2 is a functional block diagram of the air conditioning control device in this air conditioning control system. FIG. 3 is a diagram for explaining in more detail the function of the total heat exchange device mode switching unit in the air conditioning control device. FIG. 4 is a diagram for explaining the function of the air conditioner operation mode switching unit in this air conditioning control device in more detail. FIG. 5 is a transition diagram of an outside air blowing operation state in the air conditioning control system. FIG. 6 is a diagram showing an outline of a conventional air conditioning control system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a main part of an air conditioning control system 100 according to an embodiment of the present invention. In FIG. 6, the same reference numerals as those in FIG. 6 denote the same or equivalent components as those described with reference to FIG.

  In this air conditioning control system 100, the air conditioning control device 3 is realized by hardware including a processor and a storage device, and a program that realizes various functions in cooperation with these hardware. As a function, the switching between the heat exchange mode and the bypass mode in the total heat exchanger 2 and the switching of the operation mode in the air conditioner 1 are controlled in cooperation.

  Hereinafter, in order to distinguish from the air-conditioning control apparatus 3 in the conventional air-conditioning control system 200 shown in FIG. 6, the air-conditioning control apparatus 3 in the air-conditioning control system 100 of this Embodiment is shown with the code | symbol 3A, The conventional air-conditioning control system 200 The air-conditioning control device 3 in FIG.

  Moreover, in the air conditioning control system 100 of the present embodiment, the total heat exchange device 2 does not have an automatic operation function, and switches between the heat exchange mode and the bypass mode in response to a command from the air conditioning control device 3A.

  In order to distinguish the total heat exchange device 2 from the total heat exchange device 2 in the conventional air conditioning control system 200, the total heat exchange device 2 in the air conditioning control system 100 of the present embodiment is denoted by reference numeral 2A, and the conventional air conditioning system 2 The total heat exchange device 2 in the control system 200 is denoted by reference numeral 2B.

  FIG. 2 shows a functional block diagram of the air conditioning control device 3A. The air conditioning control device 3A receives the cooling set temperature storage unit 31 for storing the cooling set temperature trsp, the room temperature trpv from the room temperature sensor 5 and the outside air temperature tout from the outside air temperature sensor 6, and inputs the room temperature trpv and the outside air. When the total heat exchanger mode switching unit 32 that switches the mode of the total heat exchanger 2A based on the temperature difference Δt1 (Δt1 = trpv−tout) from the temperature tout and the total heat exchanger 2A are switched to the bypass mode The difference between the indoor temperature trpv from the indoor temperature sensor 5 and the cooling set temperature trsp stored in the cooling set temperature storage unit 31 is obtained as the indoor temperature difference Δt2 (Δt2 = trpv−trsp), and this indoor temperature difference Δt2 is obtained. An air conditioner operation mode switching unit 33 that switches the operation mode of the air conditioner 1 based on the air conditioner 1 is provided.

  In this air conditioning control system 100, the room temperature sensor 5 corresponds to the room temperature detection means referred to in the present invention, and the outside air temperature sensor 6 corresponds to the outside air temperature detection means referred to in the present invention. Further, the cooling set temperature storage unit 31 corresponds to the cooling set temperature storage means in the present invention, the total heat exchanger mode switching unit 32 corresponds to the total heat exchanger mode switching unit, and the air conditioner operation mode switching unit 33 includes It corresponds to air conditioner operation mode switching means.

[Total heat exchanger mode switching section]
The function of the total heat exchanger mode switching unit 32 will be described in more detail with reference to FIG. In the total heat exchanger mode switching unit 32, the outside air temperature tout is lower than the indoor temperature trpv, and the temperature difference Δt1 (Δt1 = trpv−tout) between the outside air temperature tout and the indoor temperature trpv is determined in advance. When it becomes above (point t1 shown in Drawing 3), it has the function which changes the mode of total heat exchange device 2A from heat exchange mode to bypass mode.

  Further, the total heat exchanger mode switching unit 32 switches the mode of the total heat exchanger 2A to the bypass mode, and then the temperature difference Δt1 between the outside air temperature tout and the room temperature trpv changes from the minimum temperature difference α to the dead zone (minimum temperature difference). When the temperature difference α ′ or less obtained by subtracting the fixed value (first fixed value) γ1 determined as the “dead zone” (point t2 shown in FIG. 3), the mode of the total heat exchange device 2A is changed to the heat exchange mode. It has a function to switch.

Further, the total heat exchanger mode switching unit 32 switches the mode of the total heat exchanger 2A to the bypass mode, and then the outside air temperature tout becomes equal to or lower than a predetermined minimum outside air temperature tout _L (FIG. 3). T3 point), and has a function of switching the mode of the total heat exchange device 2A to the heat exchange mode.

The total heat exchange device mode switching unit 32 switches the mode of the total heat exchange device 2A to the heat exchange mode, and then the outside air temperature tout is defined as a dead zone (lowest outside air temperature dead zone) at the lowest outside air temperature tout _L. 2 has a function of switching the mode of the total heat exchange device 2A to the bypass mode when the temperature becomes equal to or higher than the temperature obtained by adding the fixed values γ2 of 2 (point t4 shown in FIG. 3).

  Below, the relationship between the room temperature trpv in the total heat exchanger mode switching part 32, the external temperature tout, and the mode of the total heat exchanger 2A is shown.

(1) In the previous “heat exchange mode” (indoor temperature (trpv) −outside temperature (tout)) ≧ minimum temperature difference (α) and outside temperature (tout) ≧ (minimum outside temperature (tout _L ) + dead zone (γ2 )) ⇒ Set to bypass mode.

(2) In the previous “bypass mode” (indoor temperature (trpv) −outside air temperature (tout)) ≦ (minimum temperature difference (α) −dead zone (γ1)) or outside air temperature (tout) ≦ minimum outside air temperature (tout _L ) ⇒ Set to heat exchange mode.

(3) At the time of the previous “undefined” (initial value is “undefined”) (indoor temperature (trpv) −outside temperature (tout)) ≦ (minimum temperature difference (α) and outside temperature (tout) ≧ (minimum outside temperature ( tout _L ) + dead zone (γ2)) => bypass mode.

(4) Other than (1) to (3) ⇒ Set to heat exchange mode.

[Air conditioner operation mode switching part]
The function of the air conditioner operation mode switching unit 33 will be described in more detail with reference to FIG. When the mode of the total heat exchanger 2A is switched to the bypass mode, the air conditioner operation mode switching unit 33 sets the difference between the room temperature trpv and the cooling set temperature trsp as the room temperature difference Δt2 (Δt2 = trpv−trsp). When the indoor temperature difference Δt2 is within the set value relaxation width ΔT (room temperature upper limit temperature difference ΔT1 + room temperature lower limit temperature difference ΔT2) determined as the allowable temperature difference, the operation mode of the air conditioner 1 is set as the air blowing mode, When the room temperature trpv is higher than the cooling set temperature trsp and the room temperature difference Δt2 is outside the set value relaxation width ΔT, the air conditioner 1 has a function of setting the operation mode to the cooling mode.

  Further, the air conditioner operation mode switching unit 33 switches the operation mode of the air conditioner 1 to the cooling mode (point t1 shown in FIG. 4), and then the room temperature difference Δt2 is changed from the room temperature upper limit temperature difference ΔT1 to the dead zone (room temperature upper limit temperature difference). When the temperature difference ΔT1 ′ (ΔT1 ′ = ΔT1−γ3) obtained by subtracting the fixed value (third fixed value) γ3 determined as the dead zone) is less than or equal to (ΔT1 ′ = ΔT1−γ3) (point t2 shown in FIG. 4), It has a function of switching the mode to the air blowing mode.

  In the set value relaxation width ΔT, the room temperature upper limit difference ΔT1 is an allowable temperature difference determined in the increasing direction of the room temperature trpv with reference to the cooling set temperature trsp, and the room temperature lower limit temperature difference ΔT2 is the cooling set temperature trsp. Is a permissible temperature difference determined in the downward direction of the indoor temperature trpv.

  Moreover, in this Embodiment, the air conditioner 1 is comprised from the indoor unit and the outdoor unit, and when setting the air conditioner 1 to ventilation mode, only an outdoor unit is stopped. That is, only the outdoor unit is stopped (thermo-off) while the indoor unit is activated.

  Below, the relationship between the room temperature trpv in the air-conditioner operation mode switching part 33, the air-conditioning preset temperature trsp, and the operation mode of the air-conditioner 1 is shown.

(1) At the time of the previous “air blowing mode” and “indoor unit activation” (indoor temperature (trpv) −cooling set temperature (trsp))> room temperature upper limit temperature difference (ΔT1) => Cancel and set to “cooling mode”.
(2) In the previous “cooling mode” and “indoor unit start-up” (indoor temperature (trpv) −cooling set temperature (trsp)) ≦ (room temperature upper limit temperature difference (ΔT1−dead zone (γ3)) → “indoor unit start” Continue to forcibly shift to “Blower Mode”.

  As can be seen from the above description, in the air conditioning control system 100 of the present embodiment, the air conditioning control device 3A has the outside air temperature tout lower than the room temperature trpv, and the temperature difference Δt1 between the outside air temperature tout and the room temperature trpv is the lowest. When it becomes more than the temperature difference α, the mode of the total heat exchange device 2A is switched from the heat exchange mode to the bypass mode.

  At this time, the air conditioning control device 3A obtains the difference between the room temperature trpv and the cooling set temperature trsp as the room temperature difference Δt2, and if the room temperature difference Δt2 is within the set value relaxation width ΔT, the air conditioner 1 is operated. When the mode is the ventilation mode and the room temperature trpv is higher than the cooling set temperature trsp and the room temperature difference Δt2 is outside the set value relaxation width ΔT (Δt2> ΔT1), the operation mode of the air conditioner 1 is set to the cooling mode. .

  Thereby, when the outside air temperature tout decreases and the total heat exchanger 2A is switched to the bypass mode, if the indoor temperature difference Δt2 is within the set value relaxation width ΔT, the operation mode of the air conditioner 1 is set to the air blowing mode, Wasteful operation of the air conditioner 1 can be avoided. That is, at the time of outside air cooling with the total heat exchange device 2A in the bypass mode, a greater energy saving effect can be obtained by using the air conditioner 1 as a blowing operation.

  Although not shown in FIG. 2, the air conditioner control device 3 </ b> A provides the air conditioner 1 so that the indoor temperature trpv matches the cooling set temperature trsp when the operation mode of the air conditioner 1 is set to the air blowing mode. It also has a function to control the air volume.

  In addition, the air conditioning control device 3A also has a function of increasing (in some cases) the amount of outside air to be bypassed in the total heat exchange device 2A. Actually, since the amount of outside air introduced is small, the outside air cooling effect cannot be expected, and there is a high possibility that the operation will be switched between air blowing / cooling, but the energy saving effect by thermo-off can be enhanced.

  FIG. 5 shows a transition diagram of the outside air blowing operation state in the air conditioning control system 100. At the time of initial execution, it is outside the implementation target (# 1), and when the temperature difference Δt1 between the outside air temperature tout and the room temperature trpv is equal to or greater than the minimum temperature difference α, the total heat exchanger 2A is set to the bypass mode, Enter (arrow (1)).

  When entering the implementation target, it is checked whether or not the difference (indoor temperature difference) Δt2 between the room temperature trpv and the cooling set temperature trsp is within the set value relaxation width ΔT (# 2), and the room temperature difference Δt2 is set. If it is within the value relaxation width ΔT (arrow (2)), the operation mode of the air conditioner 1 is set to the air blowing mode (# 3). If the indoor temperature difference Δt2 exceeds the room temperature upper limit temperature difference ΔT1 (arrow (5)), the operation mode of the air conditioner 1 is set to the cooling mode (# 4).

  If the room temperature difference Δt2 exceeds the room temperature upper limit temperature difference ΔT1 during the operation of the air conditioner 1 in the air blowing mode (arrow (3)), the operation mode of the air conditioner 1 is set to the cooling mode (# 4). During the operation of the air conditioner 1 in the cooling mode, when the indoor temperature difference Δt2 becomes equal to or smaller than ΔT1 '(arrow (2)), the operation mode of the air conditioner 1 is returned to the air blowing mode (# 3).

If the room temperature difference Δt2 exceeds the room temperature lower limit temperature difference ΔT2 during the operation of the air conditioner 1 in the air blowing mode (arrow (6)), the operation is not performed (# 1). In addition, when the outside air temperature tout is equal to or lower than the minimum outside air temperature tout _L or the temperature difference Δt1 between the outside air temperature tout and the room temperature trpv is equal to or lower than α ′ (arrow (7)). It will be outside (# 1).

  In the embodiment described above, in order to stabilize the operation, the fixed values γ1 and γ2 are provided as dead zones when switching between the heat exchange mode and the bypass mode. However, when switching between the air blowing mode and the cooling mode, Although the fixed value γ3 is provided as the dead zone, it is not always necessary to provide such a dead zone.

[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.

  The present invention can be used in facilities such as buildings.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2A ... Total heat exchange apparatus, 3A ... Air-conditioning control apparatus, 4 ... Control object space, 5 ... Indoor temperature sensor, 6 ... Outside temperature sensor, 7 ... Indoor temperature setting device, 31 ... Cooling setting temperature memory | storage part 32 ... Total heat exchanger mode switching unit, 33 ... Air conditioner operation mode switching unit, 100 ... Air conditioning control system.

Claims (10)

A heat exchange mode for outputting the outside air heat exchanged with the exhaust from the controlled space, and a bypass mode for outputting the outside air without performing heat exchange with the exhaust from the controlled space A total heat exchanger,
An air conditioner that inputs the return air from the control target space and the outside air from the total heat exchange device, and supplies conditioned air to the control target space;
An air conditioning control system comprising an air conditioning control device that controls switching between a heat exchange mode and a bypass mode in the total heat exchange device and an operation mode switching in the air conditioner,
An indoor temperature detecting means for detecting the temperature of the control target space as an indoor temperature;
An outside air temperature detecting means for detecting the outside air temperature before being input to the total heat exchange device as an outside air temperature;
The air conditioning control device
Cooling setting temperature storage means for storing a temperature setting value at the time of cooling determined for the room temperature as a cooling setting temperature;
When the outside air temperature is lower than the room temperature and the temperature difference between the outside temperature and the room temperature is equal to or greater than a predetermined minimum temperature difference, the mode of the total heat exchange device is bypassed from the heat exchange mode. A total heat exchanger mode switching means for switching to the mode;
When the mode of the total heat exchanger is switched to the bypass mode, a difference between the room temperature and the cooling set temperature is obtained as a room temperature difference, and the set value in which the room temperature difference is determined as an allowable temperature difference When the air conditioner is within the relaxation range, the operation mode of the air conditioner is set to the air blowing mode. An air conditioning control system comprising: an air conditioner operation mode switching means for changing the operation mode of the air conditioner to a cooling mode. In the air-conditioning control system according to claim 1,
The total heat exchanger mode switching means is
After switching the mode of the total heat exchanger to the bypass mode, when the temperature difference between the outside air temperature and the room temperature is equal to or less than the temperature difference obtained by subtracting the first fixed value from the minimum temperature difference, An air conditioning control system characterized in that the mode of the total heat exchange device is switched to the heat exchange mode. In the air-conditioning control system according to claim 1,
The total heat exchanger mode switching means is
After the mode of the total heat exchange device is switched to the bypass mode, the mode of the total heat exchange device is switched to the heat exchange mode when the outside air temperature is equal to or lower than a predetermined minimum outside air temperature. Air conditioning control system. In the air conditioning control system according to claim 3,
The total heat exchanger mode switching means is
After switching the mode of the total heat exchange device to the heat exchange mode, the mode of the total heat exchange device is changed when the outside air temperature is equal to or higher than a temperature obtained by adding a second fixed value to the minimum outside air temperature. An air conditioning control system that switches to bypass mode. In the air-conditioning control system according to claim 1,
The set value relaxation width is
The room temperature upper limit temperature difference determined in the increasing direction of the room temperature with respect to the cooling set temperature and the room temperature lower limit temperature difference determined in the decreasing direction of the room temperature,
The air conditioner operation mode switching means is
After the operation mode of the air conditioner is switched to the cooling mode, the air conditioner operation mode is blown when the indoor temperature difference is equal to or less than the temperature difference obtained by subtracting a third fixed value from the room temperature upper limit temperature difference. An air conditioning control system characterized by switching to a mode. A heat exchange mode for outputting the outside air heat exchanged with the exhaust from the controlled space, and a bypass mode for outputting the outside air without performing heat exchange with the exhaust from the controlled space In the total heat exchange device, the air conditioner that supplies the conditioned air to the control target space, using the total heat exchange device, the return air from the control target space and the outside air from the total heat exchange device as inputs, and the total heat exchange device An air-conditioning control method applied to an air-conditioning control system including an air-conditioning control device that controls switching between a heat exchange mode and a bypass mode and switching of an operation mode in the air-conditioner,
An indoor temperature detecting step for detecting the temperature of the space to be controlled as an indoor temperature;
An outside air temperature detecting step for detecting the outside air temperature before being input to the total heat exchanger as an outside air temperature;
A cooling set temperature storage step for storing a temperature set value at the time of cooling determined for the room temperature as a cooling set temperature;
When the outside air temperature is lower than the room temperature and the temperature difference between the outside temperature and the room temperature is equal to or greater than a predetermined minimum temperature difference, the mode of the total heat exchange device is bypassed from the heat exchange mode. A total heat exchanger mode switching step for switching to the mode;
When the mode of the total heat exchanger is switched to the bypass mode, a difference between the room temperature and the cooling set temperature is obtained as a room temperature difference, and the set value in which the room temperature difference is determined as an allowable temperature difference When the air conditioner is within the relaxation range, the operation mode of the air conditioner is set to the air blowing mode. An air conditioning control method comprising: an air conditioner operation mode switching step in which the operation mode is the cooling mode. In the air-conditioning control method according to claim 6,
The total heat exchanger mode switching step includes:
After switching the mode of the total heat exchanger to the bypass mode, when the temperature difference between the outside air temperature and the room temperature is equal to or less than the temperature difference obtained by subtracting the first fixed value from the minimum temperature difference, An air conditioning control method characterized in that the mode of the total heat exchange device is switched to the heat exchange mode. In the air-conditioning control method according to claim 6,
The total heat exchanger mode switching step includes:
After the mode of the total heat exchange device is switched to the bypass mode, the mode of the total heat exchange device is switched to the heat exchange mode when the outside air temperature is equal to or lower than a predetermined minimum outside air temperature. Air conditioning control method. In the air-conditioning control method according to claim 8,
The total heat exchanger mode switching step includes:
After switching the mode of the total heat exchange device to the heat exchange mode, the mode of the total heat exchange device is changed when the outside air temperature is equal to or higher than a temperature obtained by adding a second fixed value to the minimum outside air temperature. An air conditioning control method characterized by switching to a bypass mode. In the air-conditioning control method according to claim 6,
The set value relaxation width is
The room temperature upper limit temperature difference determined in the increasing direction of the room temperature with respect to the cooling set temperature and the room temperature lower limit temperature difference determined in the decreasing direction of the room temperature,
The air conditioner operation mode switching step includes:
After the operation mode of the air conditioner is switched to the cooling mode, the air conditioner operation mode is blown when the indoor temperature difference is equal to or less than the temperature difference obtained by subtracting a third fixed value from the room temperature upper limit temperature difference. An air conditioning control method characterized by switching to a mode.

Images