JP7292245B2 - heat exchange ventilation system - Google Patents

Description

The present disclosure relates to a heat exchange ventilator provided with a heat exchanger that exchanges heat between airflows flowing through a supply airflow path and an exhaust airflow path.

2. Description of the Related Art Conventionally, there has been known a ventilation system that is installed in a space above a ceiling and ventilates a room by supplying and exhausting air through a duct. In Patent Document 1, when the actual measured value of the room temperature reaches the set value, the target values of the refrigerant pressure and blowout temperature are automatically changed to the predetermined target pressure and target blowout temperature. An outside air processing air conditioner is disclosed that controls the pressure and blowout temperature to be constant based on the above, and controls the thermo-on and thermo-off depending on whether the difference between the actual measured value and the set value of the room temperature reaches the set temperature difference. there is

Japanese Patent No. 5695861

However, the outdoor air processing air conditioner described in Patent Document 1 is devised to improve the comfort of the indoor air condition, and is set to adjust the indoor temperature based on the actual measurement value of the indoor temperature. The operation of the outdoor air processing air conditioner is controlled by the target blowout temperature. In addition, no consideration is given to whether the blowing temperature, which is the temperature of the supplied air blown into the room from the outdoor air processing air conditioner, is comfortable or uncomfortable for the user in the room.

On the other hand, in order to solve the above problems and provide a comfortable environment for the user in the room, a function to control the blowout temperature so that it does not exceed the upper limit blowout temperature or the lower limit blowout temperature preset in the control unit. There are ventilators on the market with In such a ventilator, control that prioritizes indoor humidity control is performed, and after the indoor humidity reaches the target humidity, the heating operation and humidification operation are stopped, but after that, the blowing temperature of the supplied air is controlled. not done. Therefore, when the outside air temperature is low during the heating operation in winter, the heating operation and the humidification operation are stopped, and the temperature of the supplied air drops significantly, which causes discomfort to the user in the room. rice field.

The present disclosure has been made in view of the above, and even when the humidification operation is stopped during the heating and humidification operation, the air supplied to the room is ventilated in a comfortable temperature environment for the user in the room. The object is to obtain a possible heat exchange type ventilation system.

In order to solve the above-described problems and achieve the object, the heat exchange type ventilation device according to the present disclosure includes an exhaust air passage for exhausting indoor air to the outside, a supply air passage for supplying outdoor air to the room, is independently formed inside, an exhaust blower for generating an exhaust flow flowing through the exhaust air passage, and an air supply blower for generating the supply air flow flowing through the supply air passage; a heat exchanger for exchanging heat between the airflow and the exhaust flow. In addition, the heat exchange type ventilator includes a temperature adjustment coil that heats or cools supply air, which is outdoor air passing through the supply air passage, and is provided downstream of the heat exchanger in the supply air passage. a humidifier that is provided downstream of the temperature adjustment coil in and humidifies the supply air that has passed through the temperature adjustment coil. In addition, the heat exchange type ventilator includes an air path switching damper that switches the exhaust air path to a bypass exhaust air path that does not pass through a heat exchanger, and a temperature adjustment coil that is provided downstream of the temperature adjustment coil in the supply air path. A supply air temperature measurement unit that measures supply air temperature, which is the temperature of the supply air that has passed through, and a control unit that controls operations of the blower unit, the temperature adjustment coil, the humidifier, and the air path switching damper. The control unit controls a lower limit blowing temperature that defines a lower limit of the blowing temperature of the supply air blown from the casing, an upper limit blowing temperature that defines an upper limit of the blowing temperature of the supply air that blows off from the casing, and a supply air temperature measuring unit. Ventilation by controlling the operation of at least one of the blower unit, the temperature adjustment coil, and the air path switching damper so as to suppress the blowing temperature based on the comparison result between the supply air temperature which is the actual value in Perform temperature suppression control. In addition, the control unit heats the supplied air with the temperature adjustment coil and humidifies the supplied air with the humidifier in the blowout temperature suppression control. The operation of at least one of the damper and the temperature control coil is adjusted to control the blowout temperature of the supply air to be equal to or higher than a predetermined target temperature.

According to the present disclosure, even when the humidifying operation is stopped during the heating and humidifying operation, the supplied air supplied to the room can be ventilated in a comfortable temperature environment for the user in the room.

FIG. 2 is a schematic plan view showing the outline of the internal configuration of the heat exchange ventilator according to the first embodiment, and is a schematic diagram showing a state in which the damper is closed; FIG. 2 is a schematic plan view showing the outline of the internal configuration of the heat exchange ventilator according to the first embodiment, and is a schematic diagram showing a state in which the damper is open; A diagram showing a functional configuration related to the operation of the heat exchange ventilator according to the first embodiment. 4 is a flow chart showing the procedure for determining the discomfort of the blow-out temperature in the control of the blow-out temperature suppression operation of the heat exchange type ventilator according to the first embodiment; 4 is a flow chart showing the procedure of thermo determination in the control of the blowout temperature suppression operation of the heat exchange type ventilator according to the first embodiment; 4 is a flow chart showing the procedure of blowout temperature suppression operation of the heat exchange type ventilator according to the first embodiment. Flowchart showing a control procedure when the indoor humidity exceeds the indoor set humidity during the heating and humidifying operation of the blowout temperature suppression operation of the heat exchange type ventilator according to the first embodiment. FIG. 4 is a diagram showing dedicated hardware for realizing the functions of the control unit according to the first embodiment; FIG. 4 is a diagram showing the configuration of a control circuit for realizing the functions of the control unit according to the first embodiment;

A heat exchange ventilator according to an embodiment will be described in detail below with reference to the drawings.

Embodiment 1.
FIG. 1 is a schematic plan view showing the outline of the internal configuration of the heat exchange ventilator 100 according to Embodiment 1, and is a schematic view showing a state in which the damper 13 is closed. FIG. 2 is a schematic plan view showing an outline of the internal configuration of the heat exchange ventilator 100 according to Embodiment 1, and is a schematic diagram showing a state in which the damper 13 is opened. FIG. 3 is a diagram showing a functional configuration related to operation of the heat exchange ventilator 100 according to the first embodiment.

A heat exchange ventilator 100 includes a main body 1 , a control device 14 and a remote controller 15 . The main body 1 is a heat exchange type ventilator, which is an air conditioning ventilator having a total heat exchanger 4 inside a casing 1a that constitutes a box body of the apparatus. The main body 1 is installed in a hidden state behind the ceiling. The remote controller 15 is installed indoors.

The casing 1a is provided with an exhaust air outlet 7 and an air supply inlet 9 on a side surface corresponding to the outdoor side, and an air supply outlet 8 and an exhaust air inlet 10 on a side surface corresponding to the indoor side. Further, in the casing 1a, there are provided a heat exchange exhaust air passage 1b, which is an exhaust air passage for discharging the indoor air to the outside by connecting the exhaust air suction port 10 and the exhaust air outlet 7, and an air supply suction port 9 and an air supply. A supply air passage 1c is formed to communicate with the air outlet 8 to supply outdoor air into the room. The heat exchange exhaust air passage 1b and the air supply air passage 1c are provided independently of each other over the entire route. In the heat exchange type ventilator 100, outdoor air is used as supply air to be supplied indoors. In addition, the room air is used as the exhaust air that is exhausted to the outside of the room.

The heat exchange type ventilator 100 is equipped with a total heat exchanger 4 that is a heat exchanger that performs total heat exchange between the airflows flowing through the supply air passage 1c and the heat exchange exhaust air passage 1b. The total heat exchanger 4 continuously exchanges heat between an exhaust flow, which is an indoor air flow passing through the heat exchange exhaust air passage 1b, and an intake air flow, which is an outdoor air flow passing through the supply air passage 1c. It is what makes you do. In the total heat exchanger 4, a primary side air passage through which the exhaust air flow of the total heat exchanger 4 passes and a secondary side air passage through which the supply air flow intersects at right angles inside, and the air flow flowing through the primary side air passage All heat is exchanged with the airflow flowing through the secondary air passage, and heat exchange ventilation can be performed.

In addition, a bypass exhaust air passage 1d, which is an exhaust air passage along with the heat exchange exhaust air passage 1b, is formed in the casing 1a. The bypass exhaust air passage 1d is an air passage that bypasses the total heat exchanger 4 and leads from the exhaust suction port 10 to the exhaust air outlet 7, and discharges the exhaust flow to the exhaust air outlet 7 without passing through the total heat exchanger 4. It is an air passage to let The exhaust flow, which is the flow of indoor air sucked from the exhaust suction port 10, flows through the heat exchange exhaust air passage 1b and passes through the total heat exchanger 4, thereby performing heat exchange involving heat exchange between the supply air flow and the exhaust flow. Ventilation can be provided. On the other hand, by causing the exhaust flow, which is the air flow of the room air sucked from the exhaust air suction port 10, to flow through the bypass exhaust air passage 1d and not pass through the total heat exchanger 4, heat exchange is accompanied between the supply air flow and the exhaust flow. Not normal ventilation can be performed.

In the casing 1a, an electric damper, which is an air passage switching damper for switching between the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d, is provided at a branching portion of the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d. 13 are provided. The damper 13 has a rotating shaft at a branch point between the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d, and switches whether or not the indoor air sucked from the exhaust air suction port 10 is passed through the total heat exchanger 4. constitutes an air passage switching unit for switching between the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d. The damper 13 is made of, for example, a plate that rotates inside the exhaust air passage, and can switch between the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d by changing the direction.

FIG. 1 shows a state in which the damper 13 is placed at a position that closes the bypass exhaust air passage 1d, that is, at a heat exchange ventilation position where the total heat exchange ventilation operation is performed, and the exhaust air passage is switched to the heat exchange exhaust air passage 1b. ing. On the other hand, FIG. 2 shows a state in which the damper 13 is arranged at the position where the bypass exhaust air passage 1d is opened, that is, the normal ventilation position for performing the normal ventilation operation, and the exhaust air passage is switched to the bypass exhaust air passage 1d. . As shown in FIG. 2 , by opening the bypass exhaust air passage 1 d with the damper 13 , bypass ventilation can be performed in which the indoor air is exhausted to the outside without passing through the total heat exchanger 4 . This allows normal ventilation without heat exchange between the supply air flow and the exhaust air flow.

The casing 1 a includes an air supply blower 3 that is provided in an air supply air passage 1 c and that generates an air flow flowing from an air supply inlet 9 toward an air supply outlet 8 . Further, the casing 1a is provided at a position downstream of the total heat exchanger 4 in the common portion of the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d. It comprises an exhaust fan 2 for generating a stream flow. The air supply fan 3 and the exhaust fan 2 constitute an air blower 17 that generates an airflow for ventilating the indoor air.

The air supply fan 3 includes an air supply motor (not shown) for driving the air supply fan 3 . The exhaust fan 2 includes an exhaust motor (not shown) for driving the exhaust fan 2 . The rotational speeds of the air supply motor and the exhaust motor change according to control by the control unit 20, which will be described later.

The casing 1a is provided in the supply air passage 1c, and has a supply air temperature T_sa, which is the temperature of the supply air, which is the outdoor air supplied to the room from the supply air outlet 8, and the temperature of the air supplied to the room from the supply air outlet 8. A supplied air temperature/humidity measuring unit 16 capable of measuring an supplied air humidity H_sa, which is the humidity of the supplied air, which is the outdoor air, is provided. That is, the supply air temperature and humidity measurement unit 16 can measure the temperature and humidity of the supply air that passes through the temperature adjustment coil 5 (to be described later) and is blown out from the casing 1a into the room. The supply air temperature and humidity measurement unit 16 measures the supply air temperature T_sa and the supply air humidity H_sa at predetermined measurement intervals. The supply air temperature and humidity measurement unit 16 transmits the measured supply air temperature T_sa and supply air humidity H_sa to the suppression operation control unit 21, which will be described later.

The supply air temperature and humidity measuring unit 16 is composed of an element capable of detecting temperature and humidity. A supplied air temperature measuring unit capable of measuring the temperature of supplied air and a supplied air humidity measuring unit capable of measuring the humidity of supplied air may be separately provided. Here, the supply air temperature T_sa, which is the temperature of the supply air, which is the outdoor air supplied into the room from the supply air outlet 8, can be rephrased as the blowout temperature of the supply air.

The casing 1a is provided at a position on the upstream side of the total heat exchanger 4 in the supply air passage 1c. An outside air temperature/humidity measuring unit 11 capable of measuring the outside air humidity H_oa, which is the humidity of the outside air sucked into the casing 1a through the port 9, is provided. That is, the outside air temperature/humidity measuring unit 11 can measure the temperature and humidity of the outside air before passing through the total heat exchanger 4 . The outside air temperature/humidity measuring unit 11 measures the outside air temperature T_oa and the outside air humidity H_oa at predetermined measurement intervals. The outside air temperature/humidity measuring unit 11 transmits information on the measured outside air temperature T_oa and outside air humidity H_oa to the restrained operation control unit 21, which will be described later.

The outside air temperature/humidity measuring unit 11 is composed of an element capable of detecting temperature and humidity. It should be noted that an outside air temperature measurement unit capable of measuring the temperature of the outside air and an outside air humidity measurement unit capable of measuring the humidity of the outside air may be separately provided.

The casing 1a is provided upstream of the total heat exchanger 4 in the common portion of the heat exchange exhaust air passage 1b and the bypass exhaust air passage 1d. and an indoor humidity H_ra, which is the humidity of the indoor air sucked into the casing 1a from the exhaust suction port 10, are provided. That is, the indoor temperature and humidity measuring unit 12 is provided upstream of the total heat exchanger 4 in the exhaust air passage, and measures the indoor temperature T_ra and the indoor humidity H_ra before passing through the total heat exchanger 4. can do. The indoor temperature/humidity measuring unit 12 measures the indoor temperature T_ra and the indoor humidity H_ra at predetermined measurement intervals. The indoor temperature/humidity measuring unit 12 transmits information on the measured indoor temperature T_ra and indoor humidity H_ra to the suppression operation control unit 21 described later.

The indoor temperature/humidity measuring unit 12 is composed of an element capable of detecting temperature and humidity. An indoor temperature measurement unit capable of measuring the temperature of the indoor air and an indoor humidity measurement unit capable of measuring the humidity of the indoor air may be separately provided.

A temperature adjustment coil 5 is arranged at a position downstream of the air supply blower 3 in the air supply passage 1c. The temperature adjustment coil 5 passes a refrigerant inside and heats or cools the supply air flow passing downstream of the supply air blower 3 in the supply air passage 1c, thereby adjusting the temperature of the supply air. Exchanger.

The operation of the temperature adjustment coil 5 is controlled by the control unit 20, which will be described later, and passes downstream of the total heat exchanger 4 in the supply air passage 1c so that the indoor temperature T_ra reaches the target temperature set by the user. Adjust the temperature of the supply air stream. That is, the temperature control coil 5 can perform a heating operation to heat the air passing through the temperature control coil 5 after passing through the total heat exchanger 4 . Moreover, the temperature control coil 5 can perform a cooling operation to cool the passing air when the air passes through the temperature control coil 5 after passing through the total heat exchanger 4 . The capacity of the temperature adjustment coil 5 is adjusted by changing the opening of an electronic expansion valve control device, which is a throttle device for adjusting the flow rate of the refrigerant flowing through the temperature adjustment coil 5 .

The temperature adjustment coil 5 is controlled to switch between thermo-on and thermo-off under the control of the controller 20, which will be described later. The thermo-on state is a state in which the refrigerant flows through the temperature adjustment coil 5 and heat is exchanged between the air around the temperature adjustment coil 5 and the refrigerant. That is, the thermo-on state is a state in which the coolant is circulating in the temperature adjustment coil 5 . Thermo-off means a state in which the refrigerant does not flow in the temperature adjustment coil 5 and heat exchange is not performed between the air around the temperature adjustment coil 5 and the refrigerant. In other words, the thermo-off state is a state in which the temperature adjustment coil 5 does not circulate the refrigerant.

Moreover, the temperature control coil 5 can change the heating capacity and the cooling capacity in multiple stages. The heating capacity and cooling capacity of the temperature adjustment coil 5 can be controlled in four stages of 100%, 50%, 25%, and 0%, for example, if the maximum capacity is 100%. However, the number of stages of the ability of the temperature adjustment coil 5 can be more than four stages, or less than four stages, and the ability of each stage can be arbitrarily selected. is.

A humidifier 6 for humidifying the supplied airflow passing through the temperature adjustment coil 5 is arranged at a position downstream of the temperature adjustment coil 5 in the supply air passage 1c. The humidifier 6 functions as a humidification air passage section that humidifies the supplied airflow blown out from the outlet of the air supply fan 3 inside the casing 1a.

As shown in FIG. 3, the control device 14 controls the operation of the blower unit 17 having the exhaust blower 2 and the air supply blower 3, the temperature control coil 5, and the damper 13, thereby controlling the heat exchange type ventilation system. 100 ventilation operation is provided. The control unit 20 includes a suppression operation control unit 21 that controls blowout temperature suppression operation, a timer unit 22 that has a timer function, and a storage unit 23 that stores various information related to control of the ventilation operation of the heat exchange type ventilator 100. And prepare. The control device 14 also includes an input interface 18, which is an input interface between components such as the remote controller 15 and the air supply temperature/humidity measurement unit 16, and the control unit 20; and an output interface 19 that is an output interface between the component and the control unit 20 .

The control unit 20 is arranged outside the casing 1a at a position where maintenance is easy to perform, and controls the air supply fan 3, the exhaust fan 2, the temperature adjustment coil 5, and the damper 13 to ventilate the heat exchange type ventilator 100. control driving. That is, the control unit 20 can communicate with the air supply fan 3 and the exhaust fan 2 via a communication line, and the basic operation of the heat exchange ventilator 100 is to turn on and off the ventilation operation, supply air, The air volume of the air blower 3 and the exhaust air blower 2 is controlled.

For example, the heat exchange type ventilator 100 operates in a low air volume operation in which the air volume is the lowest, a medium air volume operation in which the air volume is larger than the low air volume, and a high air volume in which the air volume is greater than the medium air volume. It is possible to operate with three levels of air volume, ie, high air volume operation that operates at . That is, the exhaust blower 2 and the air supply blower 3 can control the air volume in three stages of strong, medium, and weak in descending order of air volume.

In addition, as basic operations of the heat exchange ventilator 100, the control unit 20 controls the operation of the temperature adjustment coil 5 by switching between thermo-on and thermo-off of the temperature adjustment coil 5, heating operation and cooling operation of the temperature adjustment coil 5. can be controlled to switch between and change the heating and cooling capacities. By turning off the thermostat of the temperature control coil 5, the fan operation is performed without heating or cooling the supplied air flow. As a basic operation of the heat exchange ventilator 100 , the control unit 20 controls ON and OFF of humidification in the humidifier 6 .

The timer unit 22 counts a thermo-off permission timer value t_off and a thermo-on permission timer value t_on in the thermo determination to be described later.

The storage unit 23 stores various information related to the operation of the heat exchange ventilator 100 . The storage unit 23 includes an upper limit outlet temperature storage unit 24 that stores the upper limit outlet temperature Tlim_HI, a lower limit outlet temperature storage unit 25 that stores the lower limit outlet temperature Tlim_LO, and an indoor set humidity storage unit 26 that stores the indoor set humidity H_set. have As the storage unit 23, a non-volatile storage device is used so that the stored information is not erased even when the heat exchange type ventilator 100 is de-energized. The storage unit 23 is realized by, for example, a memory.

The upper limit blowout temperature Tlim_HI is the upper limit of the blowout temperature of the supply air blown into the room from the casing 1a in the ventilation operation of the heat exchange type ventilator 100, and the user in the room is comfortable with the blowout temperature of the supply air. At the upper end of the range that can be felt is the temperature specified. As will be described later, the upper limit blowout temperature Tlim_HI is used to determine whether the blowout temperature, which is the temperature of the supply air blown out from the casing 1a into the room, is comfortable or uncomfortable for the user in the room. Used as threshold temperature. The upper limit blowing temperature Tlim_HI is sent from the remote controller 15 to the control unit 20 via the input interface 18, and set and stored in the upper limit blowing temperature storage unit 24 of the storage unit 23 under the control of the control unit 20. FIG. The upper limit blowing temperature Tlim_HI can be changed to any value from the remote controller 15 via the input interface 18 .

The lower limit blowout temperature Tlim_LO is the lower limit of the blowout temperature of the supply air blown into the room from the casing 1a in the ventilation operation of the heat exchange type ventilator 100, and the blowout temperature of the supply air is comfortable for the user in the room. At the lower end of the sensible range is the specified temperature. As will be described later, the lower limit blowout temperature Tlim_LO is used to determine whether the blowout temperature, which is the temperature of the supply air blown out from the casing 1a into the room, is comfortable or uncomfortable for the user in the room. Used as threshold temperature. The lower limit blowing temperature Tlim_LO is sent from the remote controller 15 to the control unit 20 via the input interface 18, and set and stored in the lower limit blowing temperature storage unit 25 of the storage unit 23 under the control of the control unit 20. The lower limit blowing temperature Tlim_LO can be changed to any value from the remote controller 15 via the input interface 18 .

The temperature range between the lower limit blowing temperature Tlim_LO and the upper limit blowing temperature Tlim_HI is the range of the blowing temperature in which the user feels comfortable.

The indoor set humidity H_set is a target set value for indoor air humidity, is sent from the remote controller 15 to the control unit 20 via the input interface 18, and is stored in the storage unit 23 under the control of the control unit 20. It is set and stored in the unit 26 . The indoor set humidity H_set can be changed to any value from the remote controller 15 via the input interface 18 .

The suppression operation control unit 21 sets a lower limit blowing temperature Tlim_LO that defines the lower limit of the blowing temperature of the supply air blown from the casing 1a and an upper limit blowing temperature Tlim_HI that defines the upper limit of the blowing temperature of the supply air blown from the casing 1a. and the supply air temperature T_sa, and controls the operation of at least one of the blower unit 17, the temperature adjustment coil 5, and the damper 13 so as to suppress the blowout temperature to perform ventilation. Control driving. The details of the blowout temperature suppression operation will be described later. The blowout temperature suppression operation is an operation in which ventilation is performed by suppressing the blowout temperature so that the blowout temperature does not fall below the lower limit blowout temperature Tlim_LO and the blowout temperature does not exceed the upper limit blowout temperature Tlim_HI.

The remote controller 15 is a terminal for at least the user to perform operations related to starting and stopping the operation of the heat exchange ventilator 100 . The remote controller 15 receives commands for various controls such as the ventilation operation of the heat exchange ventilator 100 . The remote controller 15 transmits various commands received from the user to the control unit 20 of the control device 14 . That is, the remote controller 15 is capable of switching on/off of operation, switching of ventilation air volume, switching of ventilation mode, setting of an operation timer, etc., in the heat exchange type ventilator 100 . The remote controller 15 corresponds to, for example, a remote controller, a computer in which an operation application is installed, a tablet terminal, a smartphone, or the like.

The supplied air temperature T_sa and the supplied air humidity H_sa measured by the supplied air temperature/humidity measuring unit 16, the indoor temperature T_ra and the indoor humidity H_ra measured by the indoor temperature/humidity measuring unit 12, and the outside temperature/humidity measuring unit 11 measured The outside air temperature T_oa, the outside air humidity H_oa, and the information input from the remote controller 15 are sent to the restrained operation control section 21 via the input interface 18 . A control signal transmitted from the suppression operation control unit 21 is transmitted to the blower unit 17 , the temperature adjustment coil 5 and the damper 13 via the output interface 19 . The blower section 17, the temperature adjustment coil 5, and the damper 13 change the output of the blower section 17, the output of the temperature adjustment coil 5, or the opening/closing operation of the damper 13 according to the received control signal. The output of the air blower 17 is the output of the air supply fan 3 and the exhaust fan 2 . The output of the temperature regulation coil 5 is the temperature regulation capability of the supply air.

Next, the blowout temperature suppression operation in the heat exchange type ventilator 100 will be described. First, a description will be given of the discomfort determination of the blowout temperature in the control of the blowout temperature suppression operation of the heat exchange type ventilator 100. FIG. The blowout temperature discomfort determination is a determination as to whether the blowout temperature, which is the current temperature of the supplied air, is comfortable or uncomfortable for the user in the room.

FIG. 4 is a flow chart showing the procedure for determining the discomfort of the blowout temperature in the control of the blowout temperature suppression operation of the heat exchange type ventilator 100 according to the first embodiment. In the blowout temperature suppression operation, the suppression operation control unit 21 compares the upper limit blowout temperature Tlim_HI or the lower limit blowout temperature Tlim_LO with the supply air temperature T_sa to determine whether the current supply air temperature is comfortable or uncomfortable. is determined. The supply air temperature T_sa is the temperature of the supply air blown out from the casing 1a, that is, the blowing temperature of the supply air blown out from the casing 1a, and is the temperature measured by the supply temperature/humidity measuring unit 16 .

First, in step S110, the supply air temperature/humidity measuring unit 16 measures the supply air temperature T_sa at a predetermined measurement cycle. The supply air temperature and humidity measurement unit 16 transmits information on the measured supply air temperature T_sa to the restrained operation control unit 21 . After step S110, the process proceeds to step S120.

In step S120, the suppression operation control unit 21 determines whether or not the current operation mode of the temperature adjustment coil 5 is the heating operation. The suppression operation control unit 21 acquires information on the control mode of the temperature adjustment coil 5 from the control unit 20, and based on the information on the control mode of the temperature adjustment coil 5, determines whether the current operation mode is the heating operation. judge. When it is determined in step S120 that the operation mode is the heating operation, the result in step S120 is Yes, and the process proceeds to step S130. If it is determined in step S120 that the operation mode is not the heating operation, the result in step S120 is No, and the process proceeds to step S150.

In step S130, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is higher than the upper limit blowing temperature Tlim_HI. When it is determined in step S130 that the supply air temperature T_sa is higher than the upper limit blowing temperature Tlim_HI, the determination in step S130 is Yes, and the process proceeds to step S140.

In step S140, the suppression operation control unit 21 determines that the blowing temperature of the supply air blown from the casing 1a is uncomfortable.

When it is determined in step S130 that the supply air temperature T_sa is equal to or lower than the upper limit blowing temperature Tlim_HI, the result in step S130 is No, and the process proceeds to step S170.

In step S170, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is lower than the lower limit blowing temperature Tlim_LO. When it is determined in step S170 that the supply air temperature T_sa is lower than the lower limit outlet temperature Tlim_LO, the determination in step S170 is Yes, and the process proceeds to step S140.

When it is determined in step S170 that the supply air temperature T_sa is equal to or higher than the lower limit outlet temperature Tlim_LO, the result in step S170 is No, and the process returns to step S110. When it is determined that the supply air temperature T_sa is equal to or higher than the lower limit blowing temperature Tlim_LO, the suppression operation control unit 21 determines that the blowing temperature of the supply air blown from the casing 1a is not uncomfortable.

In step S150, the suppression operation control unit 21 determines whether or not the current operation mode of the temperature adjustment coil 5 is the cooling operation. If it is determined in step S150 that the operation mode is the cooling operation, the result in step S150 is Yes, and the process proceeds to step S160. If it is determined in step S150 that the operation mode is not the cooling operation, the result in step S150 is No, and the process returns to step S110.

In step S160, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is lower than the lower limit blowing temperature Tlim_LO. When it is determined in step S160 that the supply air temperature T_sa is lower than the lower limit outlet temperature Tlim_LO, the determination in step S160 is Yes, and the process proceeds to step S140.

When it is determined in step S160 that the supply air temperature T_sa is equal to or higher than the lower limit outlet temperature Tlim_LO, the result in step S160 is No, and the process returns to step S110. When it is determined that the supply air temperature T_sa is equal to or higher than the lower limit blowing temperature Tlim_LO, the suppression operation control unit 21 determines that the blowing temperature of the supply air blown from the casing 1a is not uncomfortable.

Next, the thermo determination in the control of the blowout temperature suppression operation of the heat exchange type ventilator 100 will be described. FIG. 5 is a flow chart showing the procedure of thermo determination in control of the blowout temperature suppression operation of the heat exchange type ventilator 100 according to the first embodiment. In the blown-out temperature suppression operation, switching between thermo-on and thermo-off of the temperature control coil 5 is controlled using the comfortable or uncomfortable blow-out temperature determined by the procedure shown in the flowchart of FIG.

First, in step S210, the suppression operation control unit 21 determines whether or not the temperature adjustment coil 5 is currently in the thermo-on state. The restrained operation control unit 21 acquires information on the control mode of the temperature adjustment coil 5 from the control unit 20, and determines whether the temperature adjustment coil 5 is thermo-on based on the information on the control mode of the temperature adjustment coil 5. do. If it is determined in step S210 that the temperature control coil 5 is thermo-on, the determination in step S210 is YES, and the process proceeds to step S220. If it is determined in step S210 that the temperature adjustment coil 5 is not thermo-ON, the result in step S210 is No, and the process proceeds to step S260.

In step S220, it is determined whether or not the blowing temperature is uncomfortable according to the procedure shown in the flowchart of FIG. If it is determined in step S220 that the blowing temperature is uncomfortable, the determination in step S220 is YES, and the process proceeds to step S230. If it is determined in step S220 that the blowing temperature is not uncomfortable, the result in step S220 is No, and the process returns to step S220.

At step S230, the timer unit 22 counts the thermo-off permission timer value t_off. The count of the thermo-off permission timer value t_off is the count of the time during which it is determined to be uncomfortable, that is, the count of the time during which the supply air temperature T_sa is greater than the upper limit blowing temperature Tlim_HI or less than the lower limit blowing temperature Tlim_LO. In the thermo determination, when the count time of the thermo off permission timer value t_off is equal to or longer than a predetermined first predetermined time, the temperature adjustment coil 5 is controlled to turn off the thermo. As a result, it is possible to prevent the temperature adjustment coil 5 from rapidly switching between thermo-on and thermo-off due to fluctuations in the measured value of the supply air temperature T_sa measured by the supply air temperature and humidity measuring unit 16 .

For the first predetermined time, the suppression operation control unit 21 determines whether or not to switch the temperature adjustment coil 5 to the thermo-off state when the temperature adjustment coil 5 is in the thermo-on state and the blowout temperature is determined to be uncomfortable. It is the threshold time for , and can be changed to any time. An example of the first predetermined time is 15 minutes, for example. After step S230, the process proceeds to step S240.

In step S240, the suppression operation control unit 21 determines whether or not the count time of the thermo-off permission timer value t_off is equal to or longer than a predetermined first predetermined time. When it is determined in step S240 that the count time of the thermo-off permission timer value t_off is equal to or longer than the first predetermined time, the determination in step S240 is Yes, and the process proceeds to step S250.

If it is determined in step S240 that the count time of the thermo-off permission timer value t_off is less than the first predetermined time, the result in step S240 is No, and the process returns to step S220.

In step S250, the suppression operation control unit 21 turns off the temperature adjustment coil 5 and resets the count of the thermo-off permission timer value t_off.

At step S260, the timer unit 22 starts counting the thermo-on permission timer value t_on. In the thermo determination, when the count time of the thermo-on permission timer value t_on is equal to or longer than a predetermined second predetermined time, the temperature adjustment coil 5 is controlled to thermo-on.

The second predetermined time is a threshold time for the suppression operation control unit 21 to determine whether or not to switch the temperature adjustment coil 5 from thermo-off to thermo-on, and can be changed to any time. An example of the second predetermined time is 15 minutes, for example. After step S260, the process proceeds to step S270.

In step S270, the suppression operation control unit 21 determines whether or not the count time of the thermo-on permission timer value t_on is equal to or longer than the second predetermined time. If it is determined in step S270 that the count time of the thermo-on permission timer value t_on is equal to or longer than the second predetermined time, the determination in step S270 is YES, and the process proceeds to step S280.

If it is determined in step S270 that the count time of the thermo-on permission timer value t_on is less than the second predetermined time, the result in step S270 is No, and the process returns to step S260 to continue counting the thermo-on permission timer value t_on.

In step S280, the suppression operation control unit 21 switches the temperature adjustment coil 5 to thermo-on, and resets the count of the thermo-on permission timer value t_on.

By performing the above process, when the temperature adjustment coil 5 is thermo-on, the time during which the supply air temperature T_sa is higher than the upper limit blowing temperature Tlim_HI or the time during which the supply air temperature T_sa is lower than the lower limit blowing temperature Tlim_LO is determined in advance. When the set predetermined time or longer has elapsed, the temperature control coil 5 can be controlled to turn off the thermostat. Further, when performing step S210 again after turning off the temperature control coil 5 in step S250, it is possible to perform control to turn on the temperature control coil 5 when a predetermined second predetermined time or more has elapsed. . As a result, switching between the thermo-on and the thermo-off of the temperature adjustment coil 5 caused by fluctuations in the measured value of the supply air temperature T_sa measured by the supply air temperature and humidity measuring unit 16 is rapidly performed, that is, hunting in switching between the thermo-on and the thermo-off. can be prevented, and control can be stabilized.

Next, an example of control of the blowout temperature suppression operation of the heat exchange type ventilator 100 will be described. FIG. 6 is a flow chart showing the procedure of the blowout temperature suppression operation of the heat exchange ventilator 100 according to the first embodiment.

First, in step S310, the supply air temperature/humidity measuring unit 16 measures the supply air temperature T_sa at a predetermined measurement cycle. The supply air temperature and humidity measurement unit 16 transmits information on the measured supply air temperature T_sa to the restrained operation control unit 21 . After step S310, the process proceeds to step S320.

In step S320, the suppression operation control unit 21 determines whether or not the current operation mode of the temperature adjustment coil 5 is the heating operation. The suppression operation control unit 21 acquires information on the control mode of the temperature adjustment coil 5 from the control unit 20, and based on the information on the control mode of the temperature adjustment coil 5, determines whether the current operation mode is the heating operation. judge. When it is determined in step S320 that the operation mode is the heating operation, the determination in step S320 is Yes, and the process proceeds to step S330. If it is determined in step S320 that the operation mode is not the heating operation, the result in step S320 is No, and the process proceeds to step S390.

In step S330, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is equal to or higher than the "upper limit blowing temperature Tlim_HI-ΔT1". When it is determined in step S330 that the supply air temperature T_sa is equal to or higher than the "upper limit blowing temperature Tlim_HI-ΔT1", the determination in step S330 is Yes, and the process proceeds to step S340. When it is determined in step S330 that the supply air temperature T_sa is less than the "upper limit blowing temperature Tlim_HI-ΔT1", the result in step S330 is No, and the process proceeds to step S370.

.DELTA.T1 is the upper limit blowing temperature in order to determine the blowing temperature suppression control to be performed from a plurality of blowing temperature suppression controls that can be performed by the suppression operation control unit 21 when the suppression operation control unit 21 performs the blowing temperature suppression operation. It is a first correction value that separates the temperature region between the upper limit blowing temperature Tlim_HI and the lower blowing temperature Tlim_LO with respect to Tlim_HI or the lower limit blowing temperature Tlim_LO.

In step S340, the discomfort determination of the blowing temperature is performed according to the procedure shown in the flowcharts of FIGS. 4 and 5, and it is determined whether or not the result of the discomfort determination of the blowing temperature is uncomfortable. If the discomfort determination result of the blowing temperature is not uncomfortable, the determination in step S340 is Yes, and the process proceeds to step S350. When the discomfort determination result of the blowing temperature is uncomfortable, it becomes No in step S340, and it progresses to step S360.

In step S350, the suppression operation control unit 21 performs the first blowout temperature suppression control, and ends the series of processes. Blow-out temperature suppression control is control for suppressing the blow-out temperature below the current blow-out temperature, and is control for lowering the blow-out temperature when the operation mode of the heat exchange ventilator 100 is the heating operation. When the operation mode of the device 100 is the cooling operation, the control is to raise the blowout temperature.

In the first blowout temperature suppression control, the suppression operation control unit 21, for example, sets the output of the blower unit 17 to a high air volume, sets the output of the temperature adjustment coil 5 to 25%, closes the damper 13, and performs bypass ventilation. A control signal for suppressing the supply air temperature T_sa is transmitted to the actuator. In this manner, the suppression operation control unit 21 controls at least one of the blower unit 17, the temperature adjustment coil 5, and the damper 13 to perform control to suppress the supply air temperature T_sa. The control signal is a signal for changing the output of each actuator of the air blower 17, the temperature control coil 5, and the damper 13, which are actuators used for the ventilation operation.

Here, by increasing the output of the temperature adjustment coil 5, the heating amount or cooling amount of the temperature adjustment coil 5 is increased. Also, by reducing the output of the temperature adjustment coil 5, the amount of heating or cooling of the temperature adjustment coil 5 is reduced. In order to suppress the supply air temperature T_sa in the blowout temperature suppression operation, during the heating operation of the temperature adjustment coil 5, control is performed to reduce the heating amount of the temperature adjustment coil 5 compared to immediately before the blowout temperature suppression control is performed. During the cooling operation of the regulating coil 5, control is performed to reduce the amount of cooling of the temperature regulating coil 5 compared to immediately before the blowout temperature suppression control is performed.

Further, in order to suppress the supply air temperature T_sa in the blowout temperature suppression operation, control is performed on the blower 17 to increase or decrease the air volume of the blower 17 compared to immediately before performing the blowout temperature suppression control. In addition, in order to suppress the supply air temperature T_sa in the blowout temperature suppression operation, the supply air temperature Control is performed to move the damper 13 to any position suitable for suppressing T_sa.

In the first blowout temperature suppression control, the output of the temperature adjustment coil 5, the output of the air blower 17, and the operation of the damper 13, for example, are not dependent on the first blowout temperature suppression control. If there is no control that achieves the effect, the output of each actuator is left unchanged.

In step S360, the suppression operation control section 21 performs the third blowout temperature suppression control, and ends the series of processes. The third blowout temperature suppression control is control to turn off the thermostat of the temperature adjustment coil 5 . In this case, bypass ventilation may be performed with the damper 13 closed, and the operation of the air blower 17 may be continued, or the output of the air blower 17 may be stopped. In the third blowout temperature suppression control, among the output of the temperature adjustment coil 5, the output of the air blower 17, and the operation of the damper 13, the most effective blowout temperature suppression control is selected as a possible blowout temperature suppression control. It is possible to implement

In step S370, it is determined whether or not the supply air temperature T_sa is equal to or higher than the "upper limit blowing temperature Tlim_HI-ΔT2". When it is determined in step S370 that the supply air temperature T_sa is equal to or higher than the "upper limit blowing temperature Tlim_HI-ΔT2", the determination in step S370 is Yes, and the process proceeds to step S380.

.DELTA.T2 is the upper limit blowout temperature for determining the blowout temperature suppression control to be performed from a plurality of blowout temperature suppression controls that can be performed by the suppression operation control unit 21 when the suppression operation control unit 21 performs the blowout temperature suppression operation. It is a second correction value that divides the temperature region between the upper limit blowing temperature Tlim_HI and the lower blowing temperature Tlim_LO with respect to Tlim_HI or the lower limit blowing temperature Tlim_LO.

The magnitude relationship between ΔT1 in step S330 and ΔT2 in step S370 is "ΔT1<ΔT2", and ΔT2 is greater than ΔT1. Therefore, “upper limit blowing temperature Tlim_HI−ΔT1”>“upper limit blowing temperature Tlim_HI−ΔT2”. The numerical values of ΔT1 and ΔT2 can be changed to arbitrary numerical values.

If it is determined in step S370 that the supply air temperature T_sa is less than the "upper limit blow-out temperature Tlim_HI-ΔT2", the result in step S370 is No, and the suppression operation control unit 21 sets the blow-out temperature to suppress the current blow-out temperature. A series of processes is terminated without implementing restraint control.

In step S380, the suppression operation control section 21 performs the second blowout temperature suppression control, and ends the series of processes. In the second blowout temperature suppression control, the suppression operation control unit 21, for example, sets the output of the blower unit 17 to a medium air volume, sets the output of the temperature adjustment coil 5 to 50%, closes the damper 13, and performs bypass ventilation. A control signal for suppressing the supply air temperature T_sa is transmitted to the actuator. In this manner, the suppression operation control unit 21 controls at least one of the blower unit 17, the temperature adjustment coil 5, and the damper 13 to perform control to suppress the supply air temperature T_sa.

In the second blowout temperature suppression control, as in the first blowout temperature suppression control, the output of the temperature adjustment coil 5, the output of the air blower 17, and the operation of the damper 13 are controlled by, for example, the second blowout temperature control. If there is no control that does not rely on temperature suppression control and achieves a greater blowout temperature suppression effect than the current control, the output of each actuator is not changed.

As described above, the characteristic of blowout temperature suppression control is that the temperature range is divided by using ΔT1 and ΔT2 with respect to the upper limit blowout temperature Tlim_HI or the lower limit blowout temperature Tlim_LO. It is to implement control to suppress the blow-out temperature step by step by sensing whether or not.

For this reason, the magnitude relationship of the blowout temperature suppression effect by the first blowout temperature suppression control, the blowout temperature suppression effect by the second blowout temperature suppression control, and the blowout temperature suppression effect by the third blowout temperature suppression control is In descending order, "the effect of the third blowout temperature suppression control>the effect of the first blowout temperature suppression control>the effect of the second blowout temperature suppression control".

However, the magnitude relationship described above is a relationship when there are only three patterns of blow-out temperature suppression control. For example, when it is determined in step S370 that the supply air temperature T_sa is less than the "upper limit blowing temperature Tlim_HI-ΔT2", the result of step S370 is No, and the supply air temperature T_sa is equal to or higher than the "upper limit blowing temperature Tlim_HI-ΔT3". It can be a control to determine whether there is. In this case, when the supply air temperature T_sa is equal to or higher than the "upper limit air supply temperature Tlim_HI-ΔT3", the fourth blowout temperature suppression control for suppressing the supply air temperature T_sa can be performed.

In step S390, the suppression operation control unit 21 determines whether or not the current operation mode of the temperature adjustment coil 5 is the cooling operation. If it is determined in step S390 that the operation mode is the cooling operation, the determination in step S390 is YES, and the process proceeds to step S400. If it is determined in step S390 that the operation mode is not the cooling operation, the result in step S390 is No, and the process returns to step S310.

In step S400, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is equal to or lower than the "lower limit blowing temperature Tlim_LO+ΔT1". If it is determined in step S400 that the supply air temperature T_sa is equal to or lower than the "lower limit blowing temperature Tlim_LO+ΔT1", the determination in step S400 is YES, and the process proceeds to step S340. When it is determined in step S400 that the supply air temperature T_sa is higher than the "lower limit outlet temperature Tlim_LO+ΔT1", the result in step S400 is No, and the process proceeds to step S410.

In step S410, the suppression operation control unit 21 determines whether or not the supply air temperature T_sa is equal to or lower than the "lower limit blowing temperature Tlim_LO+ΔT2". If it is determined in step S410 that the supply air temperature T_sa is equal to or lower than the "lower limit outlet temperature Tlim_LO+ΔT2", the determination in step S410 is YES, and the process proceeds to step S420.

If it is determined in step S410 that the supply air temperature T_sa is higher than the "lower limit blow-out temperature Tlim_LO+ΔT2", the result in step S410 is No, and the suppression operation control unit 21 controls the current blow-out temperature to suppress the blow-out temperature. A series of processing ends without performing temperature suppression control.

In step S420, the suppression operation control unit 21 performs the second blowout temperature suppression control in the same manner as in step S380 described above, and ends the series of processes.

By performing the above processing, it is possible to sense where the current supply air temperature T_sa exists in the temperature section separated by ΔT1 and ΔT2 in the temperature range between the lower limit blowing temperature Tlim_LO and the upper limit blowing temperature Tlim_HI. , it becomes possible to suppress the blowing temperature step by step using the blowing temperature suppression control that can be arbitrarily set. As a result, it is possible to control the operation of the heat exchange ventilator 100 so that the blowing temperature of the supply air blown from the casing 1a does not become a blowing temperature that does not satisfy the upper limit blowing temperature Tlim_HI and the lower limit blowing temperature Tlim_LO. There is, and the comfort of the blowing temperature of the supply air blown from the casing 1a can be improved.

Next, control when the indoor humidity H_ra becomes equal to or higher than the room set humidity H_set during the heating and humidifying operation while the blowout temperature suppression operation of the heat exchange type ventilator 100 is being carried out, that is, while the blowout temperature suppression control is being carried out, will be described. do. The heating and humidifying operation is a ventilation operation in which the temperature control coil 5 heats the supplied air and the humidifier 6 humidifies the supplied air. FIG. 7 is a flowchart showing a control procedure when the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set during the heating and humidifying operation of the blowout temperature suppression operation of the heat exchange ventilator 100 according to the first embodiment.

In step S<b>510 , the heat exchange type ventilator 100 performs the heating and humidification operation of the blowout temperature suppression operation under the control of the suppression operation control section 21 . That is, the suppression operation control unit 21 controls the heating of the supplied air by the temperature adjustment coil 5 and the humidification of the supplied air by the humidifier 6, and according to the flow charts of FIGS. While determining whether or not, for example, the blowout temperature suppression operation is controlled according to the flowchart shown in FIG.

In step S520, the indoor temperature/humidity measuring unit 12 measures the indoor temperature T_ra, which is the temperature of the indoor air, at a predetermined measurement cycle, and measures the indoor humidity H_ra, which is the humidity of the indoor air, at the predetermined measurement cycle. do. The indoor temperature/humidity measurement unit 12 transmits information on the measured indoor temperature T_ra and information on the measured indoor humidity H_ra to the suppression operation control unit 21 .

In step S530, the suppression operation control unit 21 determines whether the indoor humidity H_ra is equal to or higher than the indoor set humidity H_set. If it is determined in step S530 that the indoor humidity H_ra is less than the indoor set humidity H_set, the result in step S530 is No, and the process returns to step S520. If it is determined in step S530 that the indoor humidity H_ra is equal to or higher than the room set humidity H_set, the determination in step S530 is Yes, and the process proceeds to step S540.

In step S<b>540 , the suppression operation control unit 21 stops the humidification operation of the humidifier 6 to stop the humidification of the supplied air by the humidifier 6 .

In step S550, the suppression operation control unit 21 controls the blowout temperature of the supply air so that it does not fall below the lower limit blowout temperature Tlim_LO, which is a predetermined target temperature, that is, the supply air temperature T_sa is a predetermined target temperature. The outlet temperature suppression operation is controlled so that the outlet temperature does not fall below the lower limit outlet temperature Tlim_LO. That is, even after stopping the humidifier 6 to stop humidifying the supplied air, the suppression operation control unit 21 continues to control the blowout temperature of the supplied air.

The restrained operation control unit 21 adjusts the operation of at least one of the blower unit 17, the damper 13, and the temperature adjustment coil 5, and controls the blowout temperature of the supplied air to be equal to or higher than a predetermined target temperature. . Specifically, the suppression operation control unit 21 adjusts at least one of the air volume of the air supply fan 3, the air volume of the exhaust fan 2, the opening and closing operation of the damper 13, and the output of the temperature adjustment coil 5, and blows out Controls temperature restraint operation. The suppression operation control unit 21 adjusts a part of the air volume of the air supply fan 3, the air volume of the exhaust fan 2, the opening/closing operation of the damper 13, and the output of the temperature adjustment coil 5 to control the blowout temperature suppression operation. Alternatively, the blowout temperature suppression operation may be controlled by adjusting all of the air volume of the air supply fan 3, the air volume of the exhaust fan 2, the opening/closing operation of the damper 13, and the output of the temperature control coil 5.

The target temperature is the blowout temperature of the supplied air, which is targeted to prevent the temperature environment of the indoor air from becoming uncomfortable for the user when humidification of the supplied air by the humidifier 6 is stopped. Here, the lower limit blowing temperature Tlim_LO is set as a predetermined target temperature, but the target temperature may be a temperature other than the lower limit blowing temperature Tlim_LO. The target temperature can be sent from the remote controller 15 to the control unit 20 via the input interface 18 and set in the storage unit 23 under the control of the control unit 20 . The target temperature can be changed to any value from the remote controller 15 via the input interface 18 .

The suppression operation control unit 21 can increase the supply air temperature T_sa by reducing the output of the air supply fan 3 to reduce the air volume of the air supply fan 3 compared to immediately before performing the control in step S550. . In addition, the suppression operation control unit 21 can increase the supply air temperature T_sa by increasing the output of the exhaust fan 2 to increase the air volume of the exhaust fan 2 compared to immediately before performing the control in step S550. .

In addition, the suppression operation control unit 21 moves the damper 13 from the normal ventilation position for the normal ventilation operation to the position for blocking the bypass exhaust air passage 1d, that is, the heat exchange ventilation position for the total heat exchange ventilation operation. By arranging the damper 13, the supply air temperature T_sa can be increased. That is, by switching the normal ventilation operation to the total heat exchange ventilation operation, the supply air temperature T_sa can be increased.

In addition, the suppression operation control unit 21 can increase the supply air temperature T_sa by increasing the output of the temperature adjustment coil 5 compared to immediately before performing the control in step S550.

In addition, the suppression operation control unit 21 controls the amount of air supplied after passing through the total heat exchanger 4 when the heating of the supplied air by the temperature adjustment coil 5 and the humidification of the supplied air by the humidifier 6 are stopped during the heating and humidifying operation. The air conditions of the air are the outside temperature T_oa and the outside humidity H_oa measured by the outside temperature/humidity measuring unit 11, the indoor temperature T_ra and the indoor humidity H_ra measured by the indoor temperature/humidity measuring unit 12, and the air volume of the blower unit 17. can be calculated and predicted from the information of the air volume of the exhaust fan 2 and the information of the air volume of the air supply fan 3, which is the information of .

An example of the air condition of the supplied air after passing through the total heat exchanger 4 is the temperature and humidity of the supplied air, which is the temperature and humidity of the supplied air after passing through the total heat exchanger 4. be. Thereby, the suppression operation control unit 21 can acquire the predicted blowout temperature, which is the supply air temperature T_sa when the heating of the supply air by the temperature adjustment coil 5 and the humidification of the supply air by the humidifier 6 are stopped.

The suppression operation control unit 21 calculates the predicted blowout temperature before the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set and the operation of the humidifier 6 is stopped. Then, based on the predicted blowout temperature, the suppression operation control unit 21 determines whether the blowout temperature of the supplied air is higher than that before stopping the operation of the humidifier 6 in step S540 and after stopping the operation of the humidifier 6 in step S540. A target output, which is the output of the temperature control coil 5 for heating the supply air so that it becomes equal to or higher than the lower limit blowing temperature Tlim_LO, which is a predetermined target temperature, is estimated in advance. The target power output is estimated based on current operating conditions.

Then, after stopping the operation of the humidifier 6 in step S540, the suppression operation control unit 21 changes the output of the temperature adjustment coil 5 to the target output in step S550 to continue controlling the blowout temperature of the supplied air. do. That is, the suppression operation control unit 21 controls the temperature adjustment coil 5 with the target output when the humidifier 6 is stopped during the heating and humidification operation. As a result, the suppression operation control unit 21 can quickly adjust the output of the temperature adjustment coil 5 when the operation of the humidifier 6 is stopped, thereby suppressing the change in the blowout temperature, that is, the decrease in the supply air temperature T_sa. can be controlled by

In addition, based on the predicted blowout temperature, the suppression operation control unit 21 determines whether the blowout temperature of the supplied air is higher than the blowout temperature of the supplied air before stopping the operation of the humidifier 6 in step S540 and after stopping the operation of the humidifier 6 in step S540. Each target of the air volume of the air supply fan 3, the air volume of the exhaust fan 2, and the opening and closing operation of the damper 13 for heating the air to be equal to or higher than the lower limit blowing temperature Tlim_LO which is a predetermined target temperature Values may be pre-estimated.

When the humidifier 6 is stopped during the heating and humidifying operation, the suppression operation control unit 21 controls the air volume of the air supply fan 3, the air volume of the exhaust fan 2, and the opening/closing operation of the damper 13 with target values. As a result, when the operation of the humidifier 6 is stopped during the heating and humidifying operation, the suppression operation control unit 21 quickly controls the air volume of the air supply fan 3, the air volume of the exhaust fan 2, and the opening/closing operation of the damper 13. , and it is possible to suppress and control a change in the blowout temperature, that is, a decrease in the supply air temperature T_sa.

In step S550, the suppression operation control unit 21 controls more than one of the air volume of the air supply fan 3, the air volume of the exhaust fan 2, the opening/closing operation of the damper 13, and the output of the temperature adjustment coil 5. Based on the supply air temperature T_sa obtained after changing the output of the adjustment coil 5, it is determined whether or not the air volume of the air supply fan 3, the air volume of the exhaust fan 2, and the opening/closing operation of the damper 13 are changed, and the degree of change. good too. At this time, the order of priority for changing the air volume of the air supply fan 3, the air volume of the exhaust fan 2, and the opening/closing operation of the damper 13 can be arbitrarily determined.

When the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set during the heating and humidifying operation, the operation of the humidifier 6 is stopped, and the operation of the temperature adjustment coil 5 is stopped, air is supplied by stopping the operation of the temperature adjustment coil 5. Due to the temperature drop of the air, the user in the room may feel uncomfortable due to the feeling of cold air. Further, when the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set during the heating and humidifying operation, the operation of the humidifier 6 is stopped and the operation of the temperature adjustment coil 5 is stopped, the operation of the humidifier 6 is stopped. A temperature drop in the supplied air due to evaporation of residual water remaining in the humidifier 6 may cause discomfort due to cold air to the user in the room.

Therefore, in the heat exchange type ventilator 100, when the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set during the heating and humidifying operation, and the operation of the humidifier 6 is stopped, the air blower 17, the damper 13, and the temperature adjustment coil 5 At least one of the operations is adjusted to control the blown-out temperature of the supplied air to be equal to or higher than a predetermined target temperature. That is, in the heat exchange type ventilator 100, when the indoor humidity H_ra becomes equal to or higher than the indoor set humidity H_set during the heating and humidifying operation and the operation of the humidifier 6 is stopped, the air volume of the air supply fan 3 and the exhaust fan 2 At least one of the air volume, the opening/closing operation of the damper 13, and the output of the temperature control coil 5 is adjusted to control the blowout temperature of the supplied air so as not to fall below a predetermined target temperature. As a result, when the operation of the humidifier 6 is stopped during the heating and humidifying operation, the heat exchange type ventilator 100 prevents the user in the room from feeling uncomfortable due to the feeling of cold air, and the temperature of the air blown out is kept within the room. It is possible to maintain a comfortable temperature environment in the room without causing discomfort to existing users.

Next, a hardware configuration of the control unit 20 according to the first embodiment will be explained. The function of each part of the control part 20 is implemented by a processing circuit. These processing circuits may be implemented by dedicated hardware, or may be control circuits using a CPU (Central Processing Unit).

When the above processing circuits are realized by dedicated hardware, they are realized by the processing circuit 200 shown in FIG. FIG. 8 is a diagram showing dedicated hardware for realizing the functions of the control unit 20 according to the first embodiment. Processing circuit 200 may be a single circuit, multiple circuits, a programmed processor, a parallel programmed processor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a combination thereof.

When the processing circuit described above is realized by a control circuit using a CPU, this control circuit is, for example, the control circuit 201 having the configuration shown in FIG. FIG. 9 is a diagram showing the configuration of a control circuit 201 for realizing the functions of the control section 20 according to the first embodiment. As shown in FIG. 9, control circuit 201 includes processor 202 and memory 203 . The processor 202 is a CPU and is also called a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like. The memory 203 is, for example, non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM), They include magnetic discs, flexible discs, optical discs, compact discs, mini discs, and DVDs (Digital Versatile Discs).

When the above processing circuit is realized by the control circuit 201, it is realized by the processor 202 reading out and executing a program corresponding to processing of each component stored in the memory 203. FIG. The memory 203 is also used as temporary memory in each process executed by the processor 202 .

As described above, the heat exchange ventilator 100 according to the first embodiment can supply air to the room even when the humidification operation is stopped during the heating and humidification operation in winter, etc. Ventilation is possible in a comfortable temperature environment, and the ventilation operation can be performed so that the blowing temperature is within the range of the upper limit blowing temperature Tlim_HI and the lower blowing temperature Tlim_LO set throughout the year regardless of summer or winter.

The configuration shown in the above embodiment is an example, and can be combined with another known technique, and part of the configuration can be omitted or changed without departing from the scope of the invention. It is possible.

1 main body 1a casing 1b heat exchange exhaust air passage 1c air supply air passage 1d bypass exhaust air passage 2 exhaust air blower 3 air supply air blower 4 total heat exchanger 5 temperature control coil 6 humidifier 7 exhaust outlet, 8 supply air outlet, 9 supply air inlet, 10 exhaust air inlet, 11 outside air temperature and humidity measurement unit, 12 indoor temperature and humidity measurement unit, 13 damper, 14 control device, 15 remote controller, 16 air supply temperature Humidity measuring unit 17 Air blowing unit 18 Input interface 19 Output interface 20 Control unit 21 Suppressed operation control unit 22 Timer unit 23 Storage unit 24 Upper limit blowing temperature storage unit 25 Lower limit blowing temperature storage unit 26 Indoor Set humidity storage unit 100 heat exchange ventilator 200 processing circuit 201 control circuit 202 processor 203 memory.

Claims (3)

a casing in which an exhaust air passage for exhausting indoor air to the outside and a supply air passage for supplying outdoor air to the room are independently formed;
an air blower having an exhaust blower for generating an exhaust flow flowing through the exhaust air passage and an air supply blower for generating an air supply flow flowing through the supply air passage;
a heat exchanger for exchanging heat between the supply air stream and the exhaust air stream;
A temperature adjustment coil that is provided downstream of the heat exchanger in the supply air passage and heats or cools the supply air that is the outdoor air passing through the supply air passage;
a humidifier that is provided on the downstream side of the temperature adjustment coil in the supply air passage and humidifies the supplied air that has passed through the temperature adjustment coil;
an air path switching damper that switches the exhaust air path to a bypass exhaust air path that does not pass through the heat exchanger;
a supply air temperature measurement unit that is provided downstream of the temperature adjustment coil in the supply air passage and measures the supply air temperature, which is the temperature of the supply air that has passed through the temperature adjustment coil;
a control unit that controls operations of the blower unit, the temperature adjustment coil, the humidifier, and the air path switching damper;
with
The control unit
a lower limit blowing temperature that defines a lower limit of the blowing temperature of the supply air blown from the casing, an upper limit blowing temperature that defines an upper limit of the blowing temperature of the supply air that blows off from the casing, and measurement of the supply air temperature control the operation of at least one of the blower unit, the temperature adjustment coil, and the air path switching damper so as to suppress the blown-out temperature based on the result of comparison between the supply air temperature , which is the measured value in the unit. and perform blowout temperature suppression control to ventilate,
In the blowout temperature suppression control, when the humidifier is stopped during a heating and humidifying operation in which the temperature adjustment coil heats the supplied air and the humidifier humidifies the supplied air, the air blow unit and the air flow adjusting the operation of at least one of the path switching damper and the temperature adjustment coil so that the blowing temperature of the supplied air is equal to or higher than a predetermined target temperature;
A heat exchange type ventilation device characterized by: An indoor humidity measurement unit that measures the indoor humidity, which is the humidity of the indoor air,
wherein the control unit stops the humidifier when the indoor humidity is equal to or higher than a preset indoor set humidity;
The heat exchange type ventilator according to claim 1, characterized by: a supply air humidity measuring unit that is provided downstream of the temperature adjustment coil in the supply air passage and measures the supply air humidity, which is the humidity of the supply air that has passed through the temperature adjustment coil;
an outdoor air temperature and humidity measuring unit that measures the outdoor air temperature, which is the temperature of the outdoor air, and the outdoor air humidity, which is the humidity of the outdoor air;
an indoor temperature measuring unit that measures the indoor temperature, which is the temperature of the indoor air;
with
The control unit
The temperature adjustment when the temperature adjustment coil and the humidifier are stopped during the heating and humidification operation based on the information on the outside air temperature, the outside air humidity, the room temperature, the room humidity, and the air volume of the air blower. Calculate the temperature and humidity conditions of the supplied air, which are the temperature and humidity of the supplied air that has passed through the coil,
To heat the supply air based on the temperature and humidity conditions of the supply air so that the blowout temperature of the supply air becomes equal to or higher than the target temperature when the humidifier is stopped during the heating and humidification operation. estimating a target output that is the output of the temperature adjustment coil of
controlling the temperature adjustment coil with the target output when the humidifier is stopped during the heating and humidifying operation;
The heat exchange type ventilator according to claim 2, characterized by:

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