JPH0566044A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the load of an air conditioner by forcibly inhibiting a ventilation for a period until a room temperature becomes a value near a set temperature after the conditioner is started when it is decided that a heat exchanging ventilator performs a heat exchanging ventilation. CONSTITUTION:When a heat exchanging ventilation mode is selected, an air conditioner starts an air supply operation, etc. A control circuit 65 rotates motors M1, M2 at a low speed in response to the operation of the conditioner and sets a breezing operation mode in which air supply and discharge rates are set to low rates. Thus, when the ventilation mode is selected from a room temperature and the atmospheric temperature, the circuit 65 performs the following process. If a room temperature to be detected by a room temperature sensor Th4 does not fall within a predetermined temperature range near the set temperature after a predetermined time, the breezing mode is continued for a predetermined time T3. After the breezing mode for the time T3, an air supply farm and an air discharge fan are stopped for a predetermined time T4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention ventilates an air conditioner for air conditioning in a room and heat exchange between indoor air exhausted from the room and outdoor air supplied from the outdoors. The present invention relates to an air conditioner including a heat exchange ventilator.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the energy of air conditioning and to perform comfortable air conditioning, the outside air is supplied from the outside to the room by an air supply fan and the outside air is exhausted from the room to the outside by an exhaust fan. BACKGROUND ART A heat exchange ventilator is used in which heat is exchanged with indoor air, and outside air with a reduced temperature difference is guided into the room. In such a heat exchange ventilator, a heat exchange ventilation mode in which heat exchange ventilation is performed and a normal ventilation mode in which ventilation is performed without such heat exchange are also available. The heat exchange ventilator may be used together with an air conditioner that cools and heats the room or dehumidifies the room, and a technique for operating the heat exchange ventilator in conjunction with the air conditioner has been conventionally proposed.

On the other hand, in an office building, for example, about 30 minutes before the worker comes to work, heating or cooling is performed to adjust the temperature of the indoor space, and the worker comes to work. A comfortable room temperature is generally set at time (hereinafter, such temperature adjustment is referred to as "preheating" or "precooling"). With the technology to link the air conditioner and the heat exchange ventilator that have been proposed so far,
In order to reduce the load of air conditioning, the heat exchange ventilator is generally operated in the heat exchange ventilation mode when heating or cooling is performed by the air conditioner. Therefore, during the preheating / precooling described above, the air supply fan and the exhaust fan are driven to perform forced ventilation in the heat exchange ventilation mode.

[0004]

However, when there is no person in the room, the air in the room is not polluted, so that forced ventilation is not necessary so much. In addition, at the beginning of air conditioning, the temperature of the indoor air is often far from the temperature set in the air conditioner, and the air supply fan and exhaust fan are driven and forced during preheating and precooling. Ventilation does not only increase the load on the air conditioner, but also raises the problem that the rise time of preheating / precooling (which means the time until the room temperature reaches the set temperature) becomes long.

Therefore, an object of the present invention is to solve the above-mentioned technical problems, to reduce the load on the air conditioner in the initial stage of the start of temperature adjustment, to shorten the rise time of air conditioning, and It is an object of the present invention to provide an air conditioner capable of reducing the energy of harmony.

[0006]

An air conditioner of the present invention for achieving the above object comprises an air supply fan for introducing outside air into the room and an exhaust fan for exhausting the room air outdoors. , Has a heat exchanger for exchanging heat between outside air from the outside and indoor air, and switches between heat exchange ventilation for performing ventilation while performing the above heat exchange and ordinary ventilation for performing ventilation without the above heat exchange Possible heat exchange ventilator, room temperature detecting means to detect room temperature, outside air temperature detecting means to detect outside air temperature, air conditioner to adjust temperature to bring room temperature close to set temperature, and operation of this air conditioner In an air conditioner including a control means for driving the air supply fan and the exhaust fan of the heat exchange ventilator during the period to perform forced ventilation, each of the outside air temperature detection means and the room temperature detection means Based on output , A determining means for determining whether the heat exchange ventilator should perform normal ventilation or heat exchange ventilation, and when the determining means determines that the heat exchange ventilator should perform heat exchange ventilation. In addition, after the air conditioner starts temperature adjustment, forcible ventilation by the air supply fan and exhaust fan is prohibited in the period before the room temperature becomes a value within the predetermined temperature range near the set temperature. And a means for starting forced ventilation by the air supply fan and the exhaust fan regardless of room temperature when the determination means determines that the heat exchange ventilator should perform normal ventilation. It is characterized by

According to this structure, when it is determined by the determination means that the heat exchange ventilator should perform the heat exchange ventilation, after the operation of the air conditioner is started,
During the period until the room temperature reaches a value near the set temperature, forced ventilation by the air supply fan and exhaust fan is prohibited, so the load on the air conditioner at the beginning of temperature adjustment is reduced and the room temperature is kept low. It is possible to shorten the rise time until the temperature rises to the set temperature.

On the other hand, when the determination means determines that the heat exchange ventilator should perform normal ventilation, it is appropriate, for example, to introduce the outside air directly into the room to perform so-called outside air heating or outside air cooling. .. In this case, since it is not necessary to consider the increase in the load on the air conditioner, forced ventilation by the air supply fan and the exhaust fan is started regardless of the room temperature.

The room temperature detecting means may be provided in the air conditioner to detect the temperature of the intake air from the room. Further, the outside air temperature detecting means may be provided in, for example, an outdoor unit of an air conditioner. Further, the room temperature detection means may be provided on the heat exchange ventilator side to detect the temperature of the indoor air on the way to the heat exchanger from the room, but in this case,
At least when detecting the room temperature, it is preferable to provide a means for driving the exhaust fan with a predetermined air volume to guide the indoor air to the room temperature detecting means. With this configuration, the room temperature can be accurately detected, so that the drive control of the air supply fan and the exhaust fan can be appropriately performed at the initial start of the operation of the air conditioner.

Further, the outside air temperature detecting means may be provided on the heat exchange ventilator side to detect the temperature of outside air on the way to the heat exchanger from the outside, but in this case, At least when the outside air temperature is detected, it is preferable to provide means for driving the air supply fan with a predetermined air volume to guide the outside air to the outside air temperature detecting means. As a result, the outside air temperature can be accurately detected, and the drive control of the air supply fan and the exhaust fan can be appropriately performed in the initial stage of the operation of the air conditioner.

Further, in the air conditioner, when a predetermined time elapses after the air conditioner starts to operate, the air conditioner does not depend on whether the room temperature is within a predetermined temperature range near the set temperature or not. Means for initiating forced ventilation by the air fan and the exhaust fan may be further included. By doing this, after the above-mentioned predetermined time has elapsed, forced ventilation is started regardless of room temperature, so the time during which ventilation is suppressed is limited, and forced ventilation is ensured at times when ventilation is required. Ventilation can be started.

[0012]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 2 is a cross-sectional view showing a simplified internal configuration of the air conditioning apparatus of one embodiment of the present invention. In this air conditioner, ventilation of the room 1 is performed by the heat exchange ventilator 2, and the temperature and humidity in the room 1 are adjusted by the air conditioner 5 having the indoor unit 3 and the outdoor unit 4. is there. The air in the chamber 1 is introduced into the heat exchange ventilator 2 through the duct 8 from the exhaust port 7a formed in the cover plate 7 provided on the ceiling 6, and the exhaust fan 1 through the internal heat exchanger 9.
It is exhausted to the outside from the vent cap 12 from 0 through the duct 11. On the other hand, outside air from the outside is guided from the vent cap 13 through the duct 14 into the heat exchange ventilator 2, and through the heat exchanger 9 from the air supply fan 15 through the duct 16.
After that, air is further supplied into the chamber 1 from an air supply port 17a formed in the cover plate 17 provided on the ceiling 6.

The indoor unit 3 of the air conditioner 5 includes a heat exchanger 20 in which a refrigerant is circulated between the indoor unit 3 and the outdoor unit 4. The air in the room that has been returned to the space on one side of the heat exchanger 20 from the suction port 21 of the cover plate 26 by the circulation fan 22 is
After being heated or cooled by the heat exchanger 20, the air is blown into the chamber 1 from the air outlet 23 formed in the face plate 26.
The temperature of the intake air from the intake port 21 is detected by the room temperature sensor Th1 including a thermistor or the like.

An electric equipment box 31 of the indoor unit 3 is provided at a proper place in the room 1.
A remote control unit 30 for controlling the operations of the air conditioner 5 and the heat exchange ventilator 2 is installed. A so-called weekly timer 37 is connected to the remote control unit 30. This weekly timer 3
In 7, the time at which the air conditioner 5 is operated or stopped can be input in advance on a weekly basis, for example. In a general usage mode of the air conditioner 5 in an office building or the like, preheating or precooling is performed in which the temperature in the room 1 is adjusted by performing heating or cooling from about 30 minutes before the employee arrives at the office. The preheating / precooling is achieved by setting an appropriate operation start time in the weekly timer 37.

The electrical equipment box 31 of the indoor unit 3 and the electrical equipment box 32 of the heat exchange ventilator 2 are connected via a monitor line 33. The operation of the heat exchange ventilator 2 is controlled based on the monitor information from the monitor line 33 in accordance with the operating state of the air conditioner 5. In addition, the electrical equipment box 3 of the indoor unit 3
1 and the electrical equipment box 34 of the outdoor unit 5 are connected via a line 35, and a signal for controlling the operation of the outdoor unit 5 and an outside air temperature sensor Th provided in the outdoor unit 5 for detecting the outside air temperature.
Signals corresponding to the output of 2 are exchanged.

Reference numeral 57 denotes a remote control unit for operating the heat exchange ventilator 2, which enables the heat exchange ventilator 2 to operate independently even when the air conditioner 5 is not operated, and controls its operation. You can do it. The detailed structure of the heat exchange ventilator 2 is shown in FIGS. 3 and 4. The outside air from the duct 14 flows along the path 82 from the air supply passage 81 to the air supply fan 15 through the heat exchanger 9, and is supplied from the air supply fan 15 to the room through the duct 41.

The air from the chamber 1 through the duct 8 circulates along one of the routes 86 and 87 depending on the position of the damper 85 driven by the damper motor DM and the connecting rod 83 and rotated in the direction of the arrow 84. That is, when the damper 85 is in the position shown by the solid line in FIG. 3, the air from the duct 8 flows through the heat exchanger 9 along the path 86 from the exhaust passage 88 to the exhaust fan 10. On the other hand, when the damper 85 is at the position shown by the chain double-dashed line in FIG. 3, the exhaust fan 10 is exhausted from the exhaust passage 88 via the bypass passage 90 that bypasses the heat exchanger 9.
It is distributed according to a route 87 leading to. Th3 is duct 14
It is an outside air temperature sensor that detects the temperature of outside air from
A room temperature sensor 4 detects the temperature of the indoor air from the duct 8.

FIG. 5 is a block diagram showing the electrical construction of the heat exchange ventilator 2. The motor M1 of the air supply fan 15, the motor M2 of the exhaust fan 10 and the damper motor DM are controlled by the control circuit 65. A voltage of, for example, a single-phase 200V is supplied to the control circuit 65 from a power supply device (not shown) via the step-down transformer 91. Electric power from the power supply device is supplied from the lines 93 and 94 to the switches S1H and S1.
Is supplied to the motor M1 of the air supply fan 15 via 1L,
In addition, the exhaust fan 10 via the switches S2H and S2L.
Is supplied to the motor M2. Switches S1H, S2
H is each high-speed rotation terminal T1 of the motor M1, M2
Connected to H and T2H, and switches S1L and S2L
Are low-speed rotation terminals T1L of the motors M1 and M2,
It is connected to T2L. One of the switches S1H and S1L is turned on, and the motor M1 is switched between two states of high speed rotation and low speed rotation. by this,
It is possible to change the amount of air supplied by the air supply fan 15 into two types. Further, both the switches S1H and S1L can be turned off and the air supply fan 15 can be turned off. The same applies to the switches S2H and S2L. Each of the above switches S1H, S1L, S2H, S2L
Is controlled by the control circuit 65, and the rotation speed and rotation / stop of the motors M1 and M2 are controlled thereby.

Further, the electric power from the power supply unit is controlled by the control circuit 65 and is output from the changeover switch SW for switching between the normal ventilation mode and the heat exchange ventilation mode.
Closed limit switch 95 or open limit switch 96
Is supplied to the damper motor DM via. For example, the closed limit switch 95 is a micro switch that is turned off when the damper 85 rotates from the position indicated by the chain double-dashed line in FIG. 3 to the position indicated by the solid line and reaches the rotation end position indicated by the solid line. It is configured. Similarly, the open limit switch 96 is also turned off when the damper 85 rotates from the position shown by the solid line in FIG. 3 to the position shown by the chain double-dashed line, when it reaches the rotation end position shown by the chain double-dashed line. It is composed of switches.

In the heat exchange ventilator 2 having such a structure, the damper 85 switches the distribution path of the indoor air,
A heat exchange ventilation mode in which ventilation is performed while exchanging heat between outside air and indoor air in the heat exchanger 9, and indoor air exhausted from the room 1 bypasses the heat exchanger 9 and is accompanied by heat exchange. It is possible to switch between the normal ventilation mode that allows ventilation without any action. The normal ventilation mode is selected, for example, when the outside air is directly supplied to the room 1 to perform so-called outside air cooling or outside air heating in an intermediate period such as spring or autumn.

FIG. 6 is a block diagram showing the overall electrical construction of the above air conditioner. The heat exchange ventilator 2 and the indoor unit 3 transmit signals via the transmission circuits 51 and 52 and the monitor line 33, respectively, and the indoor unit 3 and the outdoor unit 4 through the transmission circuits 53 and 54, respectively. Control signals and so on. The transmission and reception of signals between the indoor unit 3 and the remote control unit 30 are performed by the transmission circuits 55, 5
6 is achieved.

The remote control unit 30 includes a switch 60 for setting operation modes such as operation / stop of the air conditioner 5, cooling operation, heating operation, dry operation, and air blowing operation, temperature setting, and air volume setting. A signal from the switch 60 is input to a control circuit 61 composed of an encoder, a control signal corresponding to the switch operated by the control circuit 61 is created, and the signal is transmitted from the transmission circuit 56.

On the other hand, the indoor unit 3 includes the remote control unit 3
0, a signal from the outdoor unit 4 and the heat exchange ventilator 2 is input, and a control circuit 6 that gives various control signals to these
Equipped with 2. A drive circuit 63 for driving the motor M3 of the circulation fan 22 is also connected to the control circuit 62,
The above room temperature sensor Th1 (see FIG. 2) is connected.

The heat exchange ventilator 2 includes the above control circuit 65.
Is provided. Monitor information is supplied to the control circuit 65 from the control circuit 62 of the indoor unit 3 via the transmission circuits 52 and 51 and the monitor line 33. This monitor information includes information indicating whether or not the air conditioner is operating, and information indicating the set temperature set from the remote control unit 30.

The above-described outside air temperature sensor Th3 and room temperature sensor Th4 (see FIG. 3) are connected to the control circuit 65 of the heat exchange ventilator 2. Further, a drive circuit 66 for driving the respective motors M1 and M2 of the air supply fan 15 and the exhaust fan 10 and the damper motor DM for driving the damper 85 is connected. The drive circuit 66 includes the above-described switches S1H, S1L, S2H, S2L and the like.

The outdoor unit 4 includes a control circuit 70 which receives the control signal from the indoor unit 3 and gives various signals to the indoor unit 3. The control circuit 70 drives a motor M4 that drives a fan for exchanging heat between the outside air and the refrigerant, a motor M5 that drives a compressor, and a drive circuit 71 that drives a four-way switching valve EV that switches the flow direction of the refrigerant. Control signal to. Further, the temperature information corresponding to the output of the outside air temperature sensor Th4 is transmitted via the transmission circuits 54 and 53 to the indoor unit 3
Of the control circuit 62.

When the air conditioner 5 is in operation,
The heat exchange air conditioner 2 operates in conjunction with the air conditioner 5 on the basis of the monitor information (representing the operation / stop of the air conditioner 5 and the set temperature) given from the indoor unit 3. In the present embodiment, in order to reduce the load of air conditioning during preheating / precooling realized by setting the operation start time of the air conditioner 5 in the weekly timer 37, at the beginning of the operation start of the air conditioner 5, The control shown in FIG. 1 is performed by the control circuit 65 of the heat exchange ventilator 2.

At step n1, it is judged based on the monitor information whether the air conditioner 5 is operating.
If it is in the stopped state, the air supply fan 15 and the exhaust fan 10 are stopped in step n2, and the process returns to step n1. Stopping the air supply fan 15 and the exhaust fan 10 is achieved by turning off all the switches S1H, S1L, S2H, and S2L.

When it is determined that the air conditioner 5 is operating, the switch SW is connected to the closed limit switch 95 side in step n3 to enter the heat exchange ventilation mode. Then, in step n4, the switches S1L and S2L are turned on, and ventilation is performed in a slight wind operation in which the supply air volume and the exhaust air volume are small. Hereinafter, this operation state is referred to as a breeze operation mode.

At step n5, the elapse of the predetermined time T1 is awaited. This predetermined time T1 is the longer one of the time taken for the outside air from the outside to reach the outside air temperature sensor Th3 via the duct 14 and the time taken for the room air to reach the room temperature sensor Th4 via the duct 8. Is set to a time longer than. Next, at step n6, the outside air temperature TOA detected by the outside air temperature sensor Th3 and the room temperature sensor Th4.
Reading with the room temperature TRA detected by is started. When the reading of the outside air temperature TOA and the room temperature TRA is started, the outside air and the indoor air have reached the vicinity of the sensors Th3 and Th4 by the processing in step n5.
The outside air temperature and room temperature will be accurately detected.

In step n7, the ventilation mode to be adopted by the heat exchange ventilator 2 is determined based on the outside air temperature and the room temperature detected by the outside air temperature sensor Th3 and the room temperature sensor Th4, respectively. For example, the outside temperature TOA is 20
When the temperature is below (° C.), it is determined that the air conditioner 5 is performing the heating operation, and the outside air TOA temperature is 24.
When the temperature is above (° C.), it is determined that the cooling operation is being performed. Then, when it is determined that the heating operation is performed and the room temperature TRA is higher than the outside air temperature TOA, it is determined that the heat exchange ventilation mode should be set. Further, when the room temperature TRA is lower than the outside air temperature TOA, it is determined that the normal ventilation mode should be set in order to perform the outside air heating that achieves the rise in the room temperature by directly guiding the outside air into the room. On the other hand, when it is determined that the air conditioner 5 is performing the cooling operation, similarly, when the room temperature TRA is lower than the outside temperature hand TOA, it is determined that the heat exchange ventilation mode should be set. Further, when the room temperature TRA is higher than the outside air temperature TOA, it is determined that the normal ventilation mode should be set in order to perform the outside air cooling that achieves the decrease in the room temperature by directly guiding the outside air into the room. In addition, the outside air TOA temperature is 2
When the temperature is 0 (° C.) to 24 (° C.), it is determined that the air conditioner 5 is performing an operation other than temperature adjustment, such as a blowing operation, and it is determined that the normal ventilation mode should be selected. It should be noted that the ventilation mode may be determined in consideration of the set temperature (see, for example, Japanese Patent Application No. 3-43810).

After the determination of the ventilation mode, it is determined in step n8 whether the determined ventilation mode is the normal ventilation mode. Then, in the normal ventilation mode, the process proceeds to step n9 to operate the air supply fan 15 and the exhaust fan 10 and to make the damper motor DM
The position of the damper 85 is controlled by, for example, urging, to perform ventilation in the normal ventilation mode. At this time, the control circuit 65
Switches the switches S1H, S2H or S1L, S2L into conduction in accordance with the setting of the remote control unit 57, and drives the air supply fan 15 and the exhaust fan 10 at the set air volume.

When it is determined in step n8 that the normal ventilation mode is not set, it is determined in step n10 whether or not a predetermined time T2 (for example, 30 minutes) has elapsed after the operation of the air conditioner 5 was started. When the predetermined time T2 has elapsed, in step n11, the heat exchange ventilation mode is set by controlling the damper motor DM.
Then, the supply air volume and the exhaust air volume by the air supply fan 15 and the exhaust fan 10 are set corresponding to the settings of the remote control unit 57. That is, one of the set of switches S1H and S2H or the set of switches S1L and S2L is selected and is made conductive. Subsequent processing returns to step n7. This step n7 to step n11
By the process of 1, the appropriate ventilation mode corresponding to the outside air temperature TOA and the room temperature TRA is selected, and ventilation is performed.

When it is determined in step n10 that the predetermined time T2 has not elapsed after the start of the operation of the air conditioner 5, in step n12, the room temperature sensor Th4.
It is determined whether or not the temperature TRA of the indoor air detected in step 1 is a value within a predetermined range near the set temperature TS set by the remote control unit 30. That is, it is determined whether or not TS-A <TRA <TS + A (1) holds. In the equation (1), A is a predetermined value and is selected to be, for example, about 5 (° C). When the room temperature TRA is a value within the predetermined range, the process proceeds to step n11.

At step n12, the room temperature TRA has the above (1)
If it is determined that the value is out of the range of the expression, step n13
In step n4, it is determined whether a predetermined time T3 (for example, 1 minute) has elapsed after the ventilation operation in the breeze operation mode was started. If the predetermined time T3 has not yet elapsed, the process returns to step n7, and if the predetermined time T3 has elapsed, the air supply fan 15 and the exhaust fan 10 in step n14.
Is stopped, and in step n15, a predetermined time T4
The elapse of (for example, 5 minutes) is awaited. Subsequent processing returns to step n4.

FIG. 7 is a timing chart for explaining the operation when the heat exchange ventilation mode is selected based on the room temperature TRA and the outside air temperature TOA. Figure 7 (a)
Shows the operating state of the air conditioner 5, and FIG. 7B shows the operating state of the air supply fan 15 and the exhaust fan 10. Time t
When the operation command from the remote control unit 30 is given to the air conditioner 5, the air conditioner 5 is
Start heating or blow operation. In response to this,
The control circuit 65 rotates the motors M1 and M2 at a low speed,
The mode is set to the light wind operation mode in which the supply air volume and exhaust air volume are set to very small amounts. As mentioned above, room temperature TRA and outside temperature TO
Since it is assumed that the heat exchange ventilation mode is selected from A, assuming that the heating or cooling operation is performed to simplify the description, the process in the control circuit 65 is as shown in FIG.
From step n8 to step n10.

If the room temperature TRA detected by the room temperature sensor Th4 after the predetermined time T1 is not within a predetermined temperature range in the vicinity of the set temperature TS represented by the above equation (1), the breeze operation mode is set for the predetermined time. Continued over T3. And
After the breeze operation mode for the predetermined time T3, the air supply fan 15 and the exhaust fan 10 for the predetermined time T4.
Is stopped. Such one cycle of operation including the breeze ventilation mode for the predetermined time T3 and the stop of the air supply and the exhaust for the predetermined time T4 is performed from the time t1 to the predetermined time T2.
Will be performed over a period up to time t2. That is, the air supply fan 15 and the exhaust fan 10
Are intermittently driven with a low air supply / exhaust air volume.

During the period from time t2, the heat exchange ventilator 2
In accordance with the ventilation mode determined from the outside air temperature TOA or the like, the ventilation operation is performed at the set air volume (for example, the maximum air volume). Of course, before the time t2, the outside temperature TOA
When the temperature becomes close to the set temperature TS, the room temperature TRA is processed by the processing of steps n12 and n11 in FIG.
Also, the ventilation operation in the ventilation mode determined by the outside air temperature TO and the like is started.

With such a process, during the initial period (within the predetermined time T2) when the operation of the air conditioner 5 is started for preheating / precooling, the ventilation operation with a small air volume is intermittently performed. Therefore, the load on the air conditioner 5 can be reduced. That is, during the preheating / precooling period, there are usually no people in the room 1, so that the air in the room 1 is not contaminated even if positive ventilation is not performed, and the air conditioner 5 Since it is considered that there is not much difference between the outside temperature and the room temperature at the beginning of operation, it is meaningless to perform heat exchange ventilation. Therefore, in the present embodiment, at the beginning of the operation of the air conditioner 5, the room temperature is near the set temperature TS (TS (TS
Before the temperature reaches the range of ± A), ventilation is not performed as much as possible to reduce the load of air conditioning. Moreover, the operation of the air conditioner 5 with a small amount of air in the initial stage of the operation is limited to an indispensable time period for guiding the outside air and the indoor air to the vicinity of the sensors Th3 and Th4 and detecting the outside air temperature TOA and the room temperature TRA. ing. As a result, the ventilation volume in the period of the predetermined time T2 can be suppressed to the minimum, and the room temperature TRA is accurately detected every time the time (T3 + T4) elapses, and the temperature is sufficiently close to the set temperature TS. You can judge whether. In this way, while prohibiting forced ventilation,
The room temperature TRA can be monitored well.

Also, since the time during which forced ventilation is not performed is limited within the predetermined time T2, forced ventilation is started at the time when the worker comes to the office to check the indoor carbon dioxide concentration. The indoor air can be kept clean by suppressing the increase of dust and dust. Further, when the outside air heating or the outside air heating is appropriate as in the so-called intermediate period when the temperature adjustment by cooling or heating is unnecessary, it is not necessary to consider the increase of the load of the air conditioner 5 as described above. By the processing of steps n7 to n9 in FIG. 1, forced ventilation of the room air can be performed in the normal ventilation mode from the initial stage of the operation of the air conditioner 5.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the control circuit 65 of the heat exchange ventilator 2 performs control processing of driving / stopping and rotating speed of the air supply fan 15 and the exhaust fan 10 at the beginning of the operation of the air conditioner 5. However, the control circuit 62 of the indoor unit 3 performs such control processing to supply the air supply fan 15 and the exhaust fan 16
Command to indicate whether to operate the heat exchange ventilator 2
May be given to.

Further, in the above embodiment, the ventilation operation with a small air volume is intermittently performed during the initial period of the operation of the air conditioner 5, but the operation with such a small air volume is not possible. , The room temperature TRA may reach a value near the set temperature TS, or may be continuously performed until a predetermined time T2 elapses from the start of operation of the air conditioner 5. In addition, in the above-described embodiment, the sensors Th3 and Th4 on the heat exchange ventilator 2 side are provided.
Based on the output of, the room temperature TRA has reached a predetermined temperature range near the set temperature TS, and whether the ventilation mode should be the normal ventilation mode or the heat exchange ventilation mode is determined. However, the outputs of the sensors Th1 and Th2 on the air conditioner 5 side may be used for these determinations. However, in this case, the monitor line 3
It is necessary to include each temperature information detected by the sensors Th1 and Th2 in the monitor information given to the heat exchange ventilator 2 via 3. On the other hand, in this case, when the operation of the air conditioner 5 is started, the temperature of the intake air air is detected by the room temperature sensor Th1, and the outside air temperature can be detected by the outside air temperature sensor Th2. On the side, it is not necessary to perform a breeze operation for detecting the room temperature and the outside temperature.

Various other design changes can be made without departing from the spirit of the present invention.

[0044]

As described above, according to the air conditioner of the present invention, the operation of the air conditioner is started when it is determined by the determination means that the heat exchange ventilator should perform the heat exchange ventilation. After that, forced ventilation is prohibited during the period until the room temperature reaches a value near the set temperature, so the load on the air conditioner at the beginning of temperature adjustment is reduced and the room temperature rises to the set temperature. The rise time of can be shortened.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining a control operation of a heat exchange ventilator performed in an initial period of operation start of an air conditioner in an air conditioner of an embodiment of the present invention.

FIG. 2 is a simplified cross-sectional view showing a schematic configuration of the air conditioner.

FIG. 3 is a simplified cross-sectional view showing an internal configuration of a heat exchange ventilator.

FIG. 4 is a simplified cross-sectional view showing an internal configuration of a heat exchange ventilator.

FIG. 5 is a block diagram showing an electrical configuration of a heat exchange ventilator.

FIG. 6 is a block diagram showing an electrical configuration of the air conditioner.

FIG. 7 is a timing chart showing an operation in the initial period of the operation of the air conditioner.

[Explanation of symbols]

 2 heat exchange ventilator 3 indoor unit 4 outdoor unit 5 air conditioner 9 heat exchanger 10 exhaust fan 15 air supply fan Th1 room temperature sensor Th2 outside air temperature sensor Th3 outside air temperature sensor Th4 room temperature sensor 33 monitor line 65 control circuit (control means, (Determination means)

Claims (1)

[Claims] 1. An air supply fan (1) for introducing outside air from the outside into the room.
5) and an exhaust fan (10) that exhausts indoor air to the outside,
It has a heat exchanger (9) for exchanging heat between outside air from the outside and indoor air, and heat exchange ventilation that performs ventilation while performing the above heat exchange and ordinary ventilation that performs ventilation without the above heat exchange. Switchable heat exchange ventilator (2), room temperature detection means (Th1, Th4) to detect room temperature, outside air temperature detection means (Th2, Th3) to detect outside air temperature, and to bring the room temperature close to the set temperature. The air conditioner (5) for temperature adjustment and the heat exchange ventilator during the operation of this air conditioner (5).
(2) An air conditioner provided with the control means (65) for driving the air supply fan (15) and the exhaust fan (10) to perform forced ventilation, comprising the outside air temperature detection means (Th2, Th3 ) And room temperature detection means (Th1, Th
Based on each output of (4) and (5), a determination means (65) for determining whether the above heat exchange ventilator (2) should perform normal ventilation or heat exchange ventilation, and this determination means (65) When it determines that the heat exchange ventilator (2) should perform heat exchange ventilation, the air conditioner (5)
After starting the temperature adjustment, the forced ventilation by the air supply fan (15) and exhaust fan (10) is prohibited in the period before the room temperature becomes a value within the specified temperature range near the set temperature. (65) and the determination means (65) determine that the heat exchange ventilator (2) should perform normal ventilation, the air supply fan (15) and the exhaust fan regardless of room temperature. An air conditioner comprising means (65) for starting forced ventilation according to (10).