JP2003074937A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilator in which lowering of the exhaust air volume and adhesion of condensate to the outer surface is prevented. SOLUTION: The ventilator comprises a supply air duct leading from an outdoor air inlet 1c to an indoor air outlet 1b through a heat exchanger 2, an exhaust air duct leading from an indoor air inlet 1a to an outdoor air outlet 1d through the heat exchanger 2, a supply fan 3 disposed in the supply air duct, an exhaust fan 4 disposed in the exhaust air duct, a controller 6 for controlling the supply fan 3 and the exhaust fan 4, and an outer air temperature detector 5 provided in the supply air duct. The controller 6 comprises an intermittent operation control means for repeating operation and stoppage of the supply fan 3 for a specified time when the outer air temperature is lower than a first set temperature but exceeds a second set temperature lower than the first set temperature, and a first class/third class switching control means for stopping the supply fan 3 when the outer air temperature is lower than the second set temperature, making a switch to third class ventilation and operating the supply fan 3 with a low air volume for a shortest time at a constant period in order to detect the outer air temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device using a heat exchanger.

[0002]

2. Description of the Related Art FIG. 8 is a plan view showing a ventilation device using a conventional heat exchanger. In the figure, a heat exchanger 2 is housed in a main body 1, an air supply air passage extending from an outdoor suction port 1a to an indoor outlet 1b via the heat exchanger 2, and an indoor suction port 1c.
An exhaust air passage is formed from the heat exchanger 2 to the outdoor air outlet 1d. The arrow A indicates the air supply flow and the arrow B indicates the exhaust flow. An air supply blower 3 and an exhaust air blower 4 are installed in the air supply air passage and the exhaust air passage, respectively.

A conventional ventilator is constructed as described above,
When the operation changeover switch installed in the room is manually operated, the control device 6 operates, and the air supply and exhaust blowers 3 are
4 starts operation at the same time, and an air supply flow A and an exhaust air flow B are generated. Thus, by supplying and exhausting air through the heat exchanger 2, ventilation is performed while recovering heat, reducing heat loss during cooling and heating, taking in fresh air into the room, and removing dirty air in the room. Discharge. If there is a stop request from the operation changeover switch, both the air supply and exhaust fans 3 and 4 are stopped.

[0004]

However, in the ventilation device using the conventional heat exchanger as described above, the air supply and exhaust blowers 3 and 4 are always operated / stopped simultaneously (forced simultaneous supply / discharge operation). Therefore, when the outdoor temperature is significantly reduced in winter in a cold region, the exhaust side air is cooled by the supply side air, and at that time, the steam contained in the exhaust air is frozen in the heat exchanger 2, There was a problem that the exhaust air volume decreased. In addition, when the outside air temperature falls below the operating temperature range due to abnormal weather or the like, or when the installation location of the main body 1 is hot and humid, the outside air sucked from the outdoor suction port 1a causes the main body 1
However, there is a problem that the outer surface of the main body 1 is cooled and dew is condensed, and the condensed water drips to wet the ceiling and affect the ceiling.

The present invention has been made to solve the above problems, and can prevent the exhaust air volume from decreasing and prevent the condensation water from adhering to the outer surface of the apparatus 1. The purpose is to provide a ventilation device.

[0006]

According to a first aspect of the present invention, there is provided an air ventilating device which leads from an outdoor suction port to an indoor air outlet via a heat exchanger, and from an indoor suction port to the outdoor via the heat exchanger. An exhaust air passage leading to the air outlet, an air supply blower provided in the air supply air passage, an exhaust air blower provided in the exhaust air passage, and a control device for controlling the air supply air blower and the exhaust air blower. In the ventilation device, an outside air temperature detecting means for detecting an outside air temperature provided in the air supply air passage is provided, and the control device has the outside air temperature detected by the outside air temperature detecting means is a first set temperature or less, When the temperature exceeds the second set temperature, which is lower than the first set temperature, intermittent operation control means for repeatedly operating and stopping the air supply blower for a predetermined period of time, and the detected outside air temperature are below the second set temperature. At one time Stop the air supply blower, comprising switching to the three ventilation predetermined cycle the air supply blower for detecting the outside air temperature, and one three switching control means operating at the shortest time low air amount.

The ventilator according to the second aspect of the present invention comprises display means for indicating that the ventilation has been switched to the third type ventilation, and the detected outside air temperature is below the second preset temperature and the third type ventilation is provided to the control device. Display control means for displaying on the display means that the switching has been made to.

A ventilation device according to a third aspect of the present invention is provided with an air supply device, and when the detected outside air temperature is below a second set temperature in the control device and switching to the third type ventilation, the air supply device is provided. The air supply device control means for opening the damper is provided.

In the ventilator according to the fourth aspect of the present invention, the first set temperature and the second set temperature are set for each usage area.

In the ventilator according to the fifth aspect of the present invention, the first set temperature is -5.degree. C. and the second set temperature is -10.degree. C. when the use area is a warm area.

In the ventilator according to the sixth aspect of the invention, when the place of use is a cold region, the first set temperature is -10 ° C and the second set temperature is -15 ° C.

In the ventilator according to the seventh aspect of the invention, when the place of use is an extremely cold region, the first set temperature is -15 ° C and the second set temperature is -20 ° C.

In the ventilator according to the eighth aspect of the present invention, the controller is provided with temperature setting means capable of arbitrarily setting the first preset temperature and the second preset temperature.

In the ventilator according to the ninth aspect of the present invention, the controller is provided with temperature / humidity detecting means for detecting the temperature / humidity of the place where the ventilator is installed, and the first set temperature and the second set temperature are detected by the detected temperature / humidity. An automatic temperature setting means for automatically setting the temperature is provided.

The ventilator according to the tenth aspect of the present invention comprises a test operation means for continuously operating the air supply blower for a predetermined time regardless of the outside air temperature detected by the outside air temperature detecting means.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a plan configuration diagram of a ventilation device according to Embodiment 1 of the present invention, FIG. 2 is an operation flowchart, and FIG. 3 is a diagram showing a relationship between an outside air temperature and a time chart. In FIG. 1, reference numeral 1 denotes a ventilation device main body,
Reference numeral 1a is an outdoor inlet provided for taking in outside air into the main body 1, 1b is an indoor outlet for supplying heat-exchanged fresh air into the room, and 1c is for taking in indoor air into the main body 1. Of the indoor suction port, 1d is an outdoor air outlet for heat exchange and discharging to the outside of the room, 2 is a heat exchanger housed in the main body 1,
A large number of corrugated plates for securing air passages and a large number of flat plates having heat conductivity are alternately laminated, and the corrugated plates are alternately formed by changing their corrugation directions by 90 ° to form a prismatic shape. There is.

In the main body 1, an air supply blower 3 for forming an air supply air passage from the outdoor air intake 1a to the indoor air outlet 1b via the heat exchanger 2 and through the air supply A, and the indoor air intake. An exhaust blower 4 for forming an exhaust air passage from 1c to the outdoor outlet 1d via the heat exchanger 2 and passing through the exhaust flow B.
Is installed. Reference numeral 5 is an outside air temperature detector which is an outside air temperature detecting means for detecting the temperature of the outside air taken into the main body 1, and 6 is an air supply blower 3 and an exhaust air according to the temperature detected by the outside air temperature detector 5. It is a control device that controls the blower 4 for use.

When the outside air temperature detected by the outside air temperature detector 5 is equal to or lower than the preset first preset temperature and exceeds the second preset temperature which is lower than the first preset temperature, the controller 6 supplies the air. Intermittent operation control means (not shown) that repeatedly operates and stops the air blower 3 for a predetermined time, and stops the air supply blower 3 when the detected outside air temperature is equal to or lower than the second set temperature, and only exhausts air. Switch to the 3rd type ventilation to perform, to operate the air blower 3 for a fixed period for a short period of time to detect the outside air temperature, and to supply and exhaust air at the same time.
It is composed of a type 1 / type 3 switching control means (not shown) for switching from the type ventilation method to the type 3 ventilation method.

Next, before explaining the operation of the first embodiment, the normal operation of the ventilation device will be explained. When the operator makes an operation request by the operation changeover switch, the air supply blower 3 and the exhaust air blower 4 simultaneously start operation via the control device 6, and the air supply flow A and the exhaust air flow B are generated. The air supply flow A and the exhaust air flow B flow through a corrugated plate that constitutes the heat exchanger 2 and a flat plate having good heat conductivity, and are ventilated while recovering heat to reduce heat loss during cooling and heating and to bring fresh air into the room. And discharge the dirty air in the room. And
If there is a stop request from the operation changeover switch, both the air supply and exhaust fans 3 and 4 are stopped.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be described with reference to. The program of this flowchart is stored in the ROM (not shown) of the microcomputer of the control device 6 (the same applies to the following embodiments). In step S1 shown in FIG. 2, when an operation is requested by an operation changeover switch (not shown) (t in FIG. 3).
1), the air supply blower 3 and the exhaust blower 4 simultaneously start normal operation via the control device 6. In step S2, the temperature of the outside air temperature detector 5, that is, the outside air temperature is read. In step S3, it is determined whether the outside air temperature exceeds the first installation temperature, and if it exceeds, the process returns to step S2 and normal operation is performed (t1 to t2 in FIG. 3).

When the outside air temperature decreases and becomes equal to or lower than the first set temperature, the process proceeds to step S4, and it is determined whether the outside air temperature exceeds the second set temperature. If the outside air temperature exceeds the second set temperature, the process proceeds to step S5, and the air supply blower 3 is stopped for Ta minutes. When Ta minutes have elapsed, the process proceeds to step S6, the air supply blower 3 is operated for Tb minutes, and then the process returns to step S2. As a result, the cooled feed air flow A does not flow for Ta minutes, so that the frost of the heat exchanger 2 is heated by the exhaust flow B and melted. Here, steps S2 to S6 show control by the intermittent operation control hand (t2 to t3 in FIG. 3).

If the outside air temperature is below the second set temperature, the operation proceeds to step S7, and the air supply blower 3 is stopped for a certain Tc period. When Tc minutes have passed, the process proceeds to step S8, the air supply blower 3 is operated at a low air volume for the shortest time to detect the outside air temperature, and then the process returns to step S2 (t3 to t4 in FIG. 3). Here, steps S2 to S4, S7, and S8 indicate control by the one-kind and three-kind switching control means. Then, the operation is stopped by the operation changeover switch (t4 in FIG. 3). As a result, the cooled feed air flow A does not flow for Tc minutes, so the frost of the heat exchanger 2 is heated by the exhaust flow B and melted. Further, since the cool air does not flow in from the outdoor suction port, the main body 1 can be prevented from being cooled from the inside and approaching the temperature of the installation place, and preventing condensation.

In this way, when the outside air temperature exceeds the second set temperature and becomes lower than the first set temperature, the intermittent operation control means is operated and the air supply blower 3 is cooled while it is stopped. Since the supply airflow A does not flow, the heat exchanger 2 is warmed by the heat of the exhaust air flow B from the room, the frost and the like generated by the cooling by the outdoor air is removed, and the air volume of the exhaust air flow B is significantly reduced. Can be prevented.

Further, when the outside air temperature becomes equal to or lower than the second set temperature, the type 1 / type 3 switching control means is activated, and the exhaust flow B is the same as when the supply air blower 3 is stopped when the intermittent operation control means is activated. It is possible to prevent a significant decrease in the air volume of the main body 1 and to prevent the main body 1 from being cooled by the inflow of cool air from the inside so that the temperature of the outer surface of the main body approaches the temperature of the installation place and leads to dew condensation. it can. Further, even when detecting the outside air temperature, only the air supply blower 3 is operated at a low air flow rate so that the heat transfer coefficient from the outside air to the inner surface of the main body 1 is lowered, and the time for detecting the outside air temperature is minimized. This is effective in minimizing the amount of heat transferred from the outside air to the main body 1 and preventing dew condensation on the outer surface of the main body 1. Even when the air supply blower 3 is stopped, the exhaust air blower 4 is operating, so that ventilation can be continued.

As described above, by switching between the normal operation, the intermittent operation, and the third type ventilation operation at the outside air temperature, the frost and the like attached to the heat exchanger 2 due to the cooled air supply flow is removed from the indoor exhaust flow. It is possible to prevent the heat exchanger 2 from being warmed by the heat of, and the air flow rate of the exhaust flow is significantly reduced. Further, the main body 1 is cooled by the cool air from the inner surface, and condensed water or the like adheres to the outer surface of the main body to prevent the condensed water from dripping on the ceiling or affecting the ceiling. Further, even when detecting the outside air temperature during the third type ventilation operation, the heat transfer coefficient from the outside air to the inner surface of the main body is reduced because only the air supply blower is operated at a low air volume, and the outside air temperature is detected. By minimizing the time, the amount of heat transferred from the outside air to the main body 1 can be minimized, and dew condensation on the outer surface of the main body 1 can be prevented.

Embodiment 2. Embodiment 2 FIG. 4 is a plan configuration diagram of a ventilation device showing Embodiment 2 of the present invention, and FIG. 5 is an operation flowchart. 4, the same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted (the same applies to the following embodiments). Reference numeral 7 denotes a display device installed outside, and the control means includes display control means (not shown).

Next, the operation of the second embodiment will be described with reference to FIG. In S1, the air supply blower 3 and the exhaust blower 4 simultaneously start normal operation by the operation changeover switch. In step S2, the outside air temperature detector 5 reads the outside air temperature. When the outside air temperature becomes equal to or lower than the first set temperature in step S3, the process proceeds to step S4. If the temperature is equal to or lower than the second set temperature, the process proceeds to step S7, the air supply blower 3 is stopped, and the process proceeds to step S11. Step S11
Then, the display control means of the control unit 6 causes the display 7 to display that the switching from the first type ventilation to the third type ventilation is performed. Next, in step S8, the air supply blower 3 is operated with a low air flow for the shortest time to detect the outside air temperature, and then the process returns to step S2.

If the outside air temperature exceeds the first installation temperature in step S3, the flow advances to step S12 to cancel the indication that the ventilation is the third type ventilation, and returns to step S2 to perform the normal operation. If the second set temperature is exceeded in step S4, the operation proceeds to step S5, the air supply blower 3 is stopped for Ta minutes, and the operation proceeds to step S13 to cancel the indication that the ventilation is the third type. Then, in step S6, the air supply blower 3 is set to Tb.
After driving for a minute, the process returns to step S2.

As described above, it is assumed that the outside air temperature becomes equal to or lower than the second set temperature, the air supply blower 3 is stopped, and the ventilation is switched to the third type ventilation, and this is displayed on the display unit 7. In addition to the effect of the first embodiment, the user can easily know that the third type ventilation is used. As a result, if the damper of the air supply device (not shown) installed on the wall or the like of each room is manually opened as necessary, the inside pressure of the room becomes negative when the air supply blower 3 is stopped. Can be suppressed and stable ventilation can be performed.

Embodiment 3. Embodiment 2 FIG. 6 is a plan configuration diagram of a ventilation device showing Embodiment 2 of the present invention. The operation flowchart is the same as that in FIG. 5 of the second embodiment. Figure 6
, 8a, 8b, 8c ... Are air supply devices installed outside, and the control means 6 includes air supply device control means (not shown). Others are the same as in FIG.

Next, the operation of this embodiment will be described with reference to FIG. Detect the outside temperature in steps S1 to S4,
If the temperature is equal to or lower than the second set temperature, the air supply blower 3 is stopped in step S7 and the process proceeds to step S11. In step S11, the display 7 indicates that the display control unit of the control unit 6 has switched from the first type ventilation to the third type ventilation. At this time, the air supply device control means of the control means 6 detects the switching from the first type ventilation to the third type ventilation and the dampers of the air supply devices 8a, 8b, 8c, ... Installed in the respective rooms. Open.

If the outside air temperature exceeds the first set temperature in step S3 or exceeds the second set temperature in step S4, the display control means are respectively classified into the third type ventilation in steps S12 and S13. The output is canceled and it is not displayed,
The air supply device control means is an air supply device 8 installed in each room.
Close the dampers a, 8b, 8c ....

As described above, when the outside air temperature becomes equal to or lower than the second set temperature, the air supply blower 3 is stopped and switched to the third type ventilation, the damper of the air supply device in each room is automatically opened. As a result, it is possible to suppress the negative pressure in the room due to the stop of the air supply blower 3, so that stable ventilation of the entire house can be continued.

Fourth Embodiment In this embodiment, the first and second set temperatures with respect to the outside air temperature shown in the first embodiment are specifically set for each area where the ventilation device is used. The configuration is the same as that of the first embodiment shown in FIG.
The operation will be described with reference to the operation flowchart of FIG.

The operating temperature range of each area where the ventilation device is used is
As shown in Table 1, it is generally set as 40 to -10 ° C for warm regions, 40 to -15 ° C for cold regions, and 40 to -20 ° C for extremely cold regions. Then, the first and second set temperatures are set by using the lowest temperature in the use temperature range of each use area as a guide, and the first set temperature is set to be 5 ° C higher than the lowest temperature in the use temperature range of each use area. The second set temperature is the lowest temperature in the operating temperature range of each usage area. Thus, the first,
As shown in Table 1, the second set temperature is − in warm regions.
5 ° C, -10 ° C, -10 ° C, -15 in cold regions, respectively
In cold regions and -15 ° C, it was set to -15 ° C and -20 ° C, respectively.

[0036]

[Table 1]

Next, the case of use in a warm area will be described with reference to FIG. Start operation in step S1,
The outside air temperature is detected in step S2. First in step S3
The set temperature is set to −5 ° C., and if the outside air temperature exceeds −5 ° C., normal operation is performed and the process returns to step S2. Outside temperature is -5
If it is lower than or equal to ° C, the process proceeds to step S4. The second set temperature of step S4 is set to -10 ° C, and if the outside air temperature exceeds -10 ° C, the process proceeds to step S5, and if it is -10 ° C or less, the process proceeds to step S7. Hereinafter, steps S5 and S6 are the intermittent operation by the intermittent operation control means as in the first embodiment.
Steps S7 and S8 are the
Seed operation is performed.

Next, in the case of use in a cold region, as shown in FIG. 2, the operation is started in step S1 and step S2 is started.
Detects the outside temperature. First set temperature in step S3 =-
If it is set to 10 ° C. and the outside air temperature exceeds −10 ° C., normal operation is performed and the process returns to step S2. If the outside air temperature is -10 ° C or lower, the process proceeds to step S4. The second set temperature of step S4 is set to -15 ° C. If the outside air temperature exceeds -15 ° C, the process proceeds to step S5, and if it is -15 ° C or less, the process proceeds to step S6. Hereinafter, steps S5 and S6 are performed in the first embodiment.
In the same manner as described above, the intermittent operation control means performs the intermittent operation, and in steps S7 and S8, the first type / three type switching operation means performs the third type operation.

Next, in the case of use in an extremely cold region, as shown in FIG. 2, the operation is started in step S1, and step S1 is started.
2 detects the outside temperature. First set temperature in step S3 =
It is set to -15 ° C, and if the outside air temperature exceeds -15 ° C, normal operation is performed and the process returns to step S2. If the outside air temperature is -15 ° C or lower, the process proceeds to step S4. The second set temperature of step S4 is set to -20 ° C, and if the outside air temperature exceeds -20 ° C, the process proceeds to step S5, and if it is -20 ° C or less, the process proceeds to step S6. Thereafter, in steps S5 and S6, the intermittent operation control means performs the intermittent operation similarly to the first embodiment, and in steps S7 and S3, the type 1 and type 3 switching operation means performs the type 3 operation.

As described above, the ventilation device corresponding to each region can be dealt with by changing the set temperature for switching the operation, and the cost can be suppressed by sharing the main body. In the case of a ventilator compatible with warm regions, the first set temperature for switching from normal operation to intermittent operation is -5 ° C,
The second set temperature to switch from intermittent operation to type 3 operation is -1
By setting the temperature to 0 ° C., even when used under a temperature condition exceeding the operating temperature range, dew condensation water does not drip from the outer surface of the main body 1 to the ceiling and wet the ceiling. Further, in the development of products for cold regions to warm regions, it is not necessary to improve the dew condensation resistance of products for warm regions more than necessary, and the product cost can be suppressed.

In the case of a ventilator for cold regions, the first set temperature for switching from normal operation to intermittent operation is -1.
By setting the second set temperature for switching from 0 ° C and intermittent operation to 1st type and 3rd type switching operation to -15 ° C, even when used in a temperature condition exceeding the operating temperature range, dew condensation from the outer surface of the main body 1 occurs. Water will not drip to the ceiling and will not wet the ceiling. Further, in the development of products for cold regions to warm regions, it is not necessary to improve the dew condensation resistance of the products for cold regions more than necessary, and the product cost can be suppressed. Also, in the case of a ventilator compatible with extremely cold regions, the first set temperature for switching from normal operation to intermittent operation is -10 ° C, and the second set temperature for switching from intermittent operation to type 1 / type 3 switching operation is- By setting the temperature to 15 ° C, the main body 1 can be used even when used in a temperature condition exceeding the operating temperature range.
Condensed water will not drip onto the ceiling from the outer surface and will not wet the ceiling. Further, in the development of a product targeting from an extremely cold region to a warm region, it is not necessary to improve the dew condensation resistance of the product targeting at an extremely cold region more than necessary, and the product cost can be suppressed.

Embodiment 5. In this embodiment, the outside air temperature is set so that the first and second set temperatures shown in the first embodiment can be set to arbitrary values when the apparatus is installed.
In the configuration shown in FIG. 1 of the first embodiment, the control device 6 includes temperature setting means (not shown) for setting the first and second set temperatures shown in FIG. 2 of the first embodiment to arbitrary values, Others are Figure 1
The description is omitted because it is the same. In the operation shown in FIG. 2 of the first embodiment, the values of the first set temperature in step S3 and the second set temperature in step S4 are set in the middle of a warm region and a cold region by the temperature setting means of the control device 6 during the main body construction. In some semi-cold regions, the first set temperature for switching from normal operation to intermittent operation and the second for switching from intermittent operation to type 1 / type 3 switching operation
The set temperature is set to a temperature suitable for the area, and when the device is installed in a hot and humid place, the first set temperature and the second set temperature are set higher than usual. The other operations are the same as those in the first embodiment, and the description thereof will be omitted.

As described above, since the first and second set temperatures can be set arbitrarily, if the area not set in the device or the model selection is wrong, the main body is installed in a hot and humid place. Even if it does, you can prevent condensation on the outside of the main unit by setting it to a temperature suitable for the area or a hot and humid place. Further, it is possible to prevent the air volume of the exhaust flow from decreasing.

Sixth Embodiment Embodiment 6 FIG. 7 is a plan configuration diagram of a ventilation device showing Embodiment 6 of the present invention. In the figure,
Reference numeral 9 is a temperature / humidity detector for an installation place, which is installed on the outer shell of the main body 1. Further, in the control device 6, an automatic temperature setting means for automatically setting the first and second set temperatures shown in FIG. 2 of the first embodiment based on the temperature and humidity detected by the temperature and humidity detector 9 ( (Not shown), and other parts are the same as those in FIG.

In this configuration, the values of the first set temperature of step S3 and the second set temperature of step S4 of FIG. 2 of the first embodiment are set to the temperature and humidity of the main body installation location detected by the temperature and humidity detector 9. Based on this, the automatic temperature setting means of the control device 6 automatically sets a value at which dew condensation does not occur outside the main body 1. The other operations are the same as those in the first embodiment, and the description thereof will be omitted.

As described above, the first set temperature and the second set temperature are automatically set according to the temperature and humidity detected by the temperature and humidity detecting means for detecting the temperature and humidity of the installation place.
In a house such as concrete, the place where the main body 1 is installed may become humid due to the moisture generated from the concrete immediately after construction, but even if the environment where the main body 1 is installed is improved several years later, normal operation will be changed to intermittent operation. It is possible to save the trouble of manually resetting the value of the first set temperature to be switched and the value of the second set temperature to be switched from the intermittent operation to the type 1 / type 3 switching operation.

Embodiment 7. In this embodiment, the outside temperature is
The air supply blower can be continuously operated for a predetermined time even if the temperature is equal to or lower than the first preset temperature or the second preset temperature shown in the first embodiment. In the configuration shown in FIG. 1 of the first embodiment, a trial operation means (not shown) for continuously operating the air supply blower 3 for a predetermined time even at a first set temperature or lower or a second set temperature or lower is provided. Is the same. The test operation means is a test operation switch provided in the control device 6 or an operation changeover switch installed outside.

In this configuration, the outside air temperature detected by the outside air temperature detector 5 is the same as that in the first embodiment, which is input from the trial operation switch provided in the control device 6 or the operation changeover switch provided outside. Step S3 in FIG.
Even if the temperature is not higher than the first set temperature in step S4 or is not higher than the second set temperature in step S4, the air supply blower 3 is continuously operated for a predetermined time.

As described above, the air supply blower 3 is continuously operated for a predetermined time regardless of the outside air temperature. Therefore, when checking the air volume and noise of the main body 1 after construction, the outside air temperature is very low. , The intermittent operation, or even in the state of the third type ventilation operation, it is temporarily released, and the air supply blower 5 is also continuously operated,
The test run can be easily confirmed without being affected by the outside temperature.

[0050]

As described above, the ventilator according to the first aspect of the present invention is provided with an air supply passage leading from the outdoor suction port to the indoor air outlet via the heat exchanger, and from the indoor suction port via the heat exchanger. An exhaust air passage leading to the outdoor air outlet, an air supply blower provided in the air supply air passage, an exhaust air blower provided in the exhaust air passage, and a control device for controlling the air supply air blower and the exhaust air blower. In a ventilator provided, comprising an outside air temperature detection means for detecting the outside air temperature provided in the air supply air passage,
When the outside air temperature detected by the outside air temperature detecting means is equal to or lower than the first preset temperature and exceeds the second preset temperature which is lower than the first preset temperature, the controller controls the air supply blower for a predetermined time. Intermittent operation control means for repeating operation and stop, and when the detected outside air temperature is equal to or lower than the second preset temperature, the air supply blower is stopped, and the third
Since it is provided with a type 1 / type 3 switching control means for switching to the type ventilation and operating the air supply blower to detect the outside air temperature with a constant period and a low air volume for the shortest time, the heat exchanger is supplied by the cooled air supply. It is possible to prevent the frost and the like adhering to the inside of the heat exchanger from being heated by the heat of the exhaust air flow from the inside of the room and significantly reducing the air volume of the exhaust air flow. Further, the main body 1 is cooled by the cool air from the inner surface, and condensed water or the like adheres to the outer surface of the main body to prevent the condensed water from dripping on the ceiling. Also, when detecting the outside air temperature from the third-class ventilator, the heat transfer coefficient from the outside air to the inner surface of the main body is reduced because only the air supply blower is operated at a low air volume, and the outside air temperature is detected. By minimizing the time, the amount of heat transferred from the outside air to the main body can be minimized, and dew condensation on the outer surface of the main body can be prevented.

The ventilator according to the second aspect of the present invention is provided with a display means for indicating that the ventilation has been switched to the third type ventilation, and the controller detects that the detected outside air temperature is equal to or lower than the second preset temperature and the third type ventilation. Since the display control means for displaying on the display means that the switching has been made to the above is provided, the user can easily know that the ventilation is the third type ventilation, and it can be installed on the wall of each room as necessary. You can manually open the damper of the supplied air supply device to ensure stable ventilation.

A ventilator according to a third aspect of the present invention is provided with an air supply device, and when the detected outside air temperature is below a second set temperature in the control device and switching to the third type ventilation, the air supply device is provided. Since the air supply device control means for opening the damper is provided, stable ventilation of the entire house can be continued.

In the ventilator according to the fourth aspect of the present invention, the first set temperature and the second set temperature are set for each area of use. Therefore, the set temperature for switching the operation of the ventilator corresponding to each area is changed. The cost can be reduced by making the main body common.

In the ventilator according to the fifth aspect of the present invention, when the use area is a warm area, the first set temperature is -5 ° C and the second set temperature is -10 ° C. In the development of a product targeted for (1), it becomes unnecessary to improve the dew condensation resistance of the product targeted for a warm region more than necessary, and the product cost can be suppressed.

In the ventilator according to the sixth aspect of the invention, when the place of use is a cold region, the first set temperature is -10 ° C and the second set temperature is -15 ° C. In the development of a product targeted for, it is not necessary to improve the dew condensation resistance of the product targeted for cold regions more than necessary, and the product cost can be suppressed.

In the ventilator according to the seventh aspect of the invention, when the place of use is an extremely cold region, the first set temperature is -15 ° C and the second set temperature is -20 ° C. In the development of products targeting up to, it is no longer necessary to improve the dew condensation resistance of products targeting extremely cold regions more than necessary,
Product cost can be reduced.

In the ventilator according to the eighth aspect of the present invention, since the control device is provided with temperature setting means capable of arbitrarily setting the first set temperature and the second set temperature, it is possible to set the temperature in a region where the product is not originally set. Even if the wrong model is selected or the device is installed in a hot and humid place, it is possible to prevent dew condensation on the outside of the main body.

In the ventilator according to the ninth aspect of the present invention, the controller is provided with temperature / humidity detecting means for detecting the temperature / humidity of the place where the ventilator is installed, and the first set temperature and the second set temperature are detected according to the detected temperature / humidity. Since the automatic temperature setting means that automatically sets the temperature was provided, the installation location of the device may become humid due to moisture generated in concrete houses, etc., but after several years the environment of the installation location of the main body was improved. Even in this case, it is possible to save the trouble of manually resetting the set temperature for switching the operation.

Since the ventilation device according to the tenth aspect of the present invention is provided with the trial operation means for continuously operating the air supply blower for a predetermined time regardless of the outside air temperature detected by the outside air temperature detecting means, the air volume after construction is reduced.・ When confirming noise, etc., even if the outside temperature is extremely low, even if it is in intermittent operation or type 3 ventilation operation, it is temporarily canceled and the test operation is confirmed without being affected by the outside temperature. It can be done easily.

[Brief description of drawings]

FIG. 1 is a plan structural view of an exchange device showing a first embodiment of the present invention.

FIG. 2 is an operation flowchart showing the first embodiment of the present invention.

FIG. 3 is a diagram showing a relationship between an outside air temperature and a time chart of the exchange device according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a second embodiment of the present invention.

FIG. 5 is an operation flowchart showing Embodiments 2 and 3 of the present invention.

FIG. 6 is a plan structure diagram showing a third embodiment of the present invention.

FIG. 7 is a plan structure diagram showing a fourth embodiment of the present invention.

FIG. 8 is a plan structural view showing a conventional ventilation device.

[Explanation of symbols]

1 Ventilator main body, 1a outdoor intake, 1b indoor outlet, 1c indoor inlet, 1d outdoor outlet, 2 heat exchanger, 3 air supply blower, 4 exhaust air blower, 5 outside air temperature detector, 6 control Device, 7 indicator, 8a, 8b,
8c Air supply device, 9 Temperature / humidity detector for installation place.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshiyuki Kobayashi             No. 40, 1041 Eggagawa, Nakatsugawa, Gifu Prefecture F term (reference) 3L061 BE01 BE03 BF01 BF05

Claims (10)

[Claims] 1. An air supply passage that communicates from an outdoor suction port to an indoor outlet via a heat exchanger, an exhaust air passage that communicates from an indoor suction port to an outdoor outlet via the heat exchanger, and the air supply passage. An air blower provided for the air supply, an exhaust air blower provided in the exhaust air passage, and a ventilation device including a control device for controlling the air blower for the air supply and the exhaust air blower, the outside air provided in the air supply passage. An outside air temperature detecting means for detecting a temperature is provided, and the control device sets a second set temperature at which the outside air temperature detected by the outside air temperature detecting means is equal to or lower than a first set temperature and is lower than the first set temperature. When exceeding, intermittent operation control means for repeatedly operating and stopping the air supply blower for a predetermined time, and when the detected outside air temperature is equal to or lower than the second set temperature, stop the air supply blower, Turn off for 3 types of ventilation In order to detect the outside air temperature, the ventilation device is provided with: a type 1 type 3 type switching control means for operating the air supply blower at a constant cycle for a short time at a low air flow rate. 2. The display device for displaying a change to the third type ventilation is provided, and the control device displays the detected outside air temperature as the second.
The ventilation device according to claim 1, further comprising display control means for displaying on the display means that the temperature has become equal to or lower than a set temperature and switching to the third type ventilation. 3. An air supply device control, wherein an air supply device is provided, and a control device opens the damper of the air supply device when the detected outside air temperature becomes equal to or lower than a second set temperature and the ventilation system is switched to the third type ventilation. The ventilation device according to claim 1, further comprising means. 4. The ventilator according to claim 1, wherein the first set temperature and the second set temperature are set for each usage area. 5. The ventilator according to claim 4, wherein the first set temperature is -5.degree. C. and the second set temperature is -10.degree. C. when the use area is a warm area. 6. The ventilator according to claim 4, wherein when the place of use is a cold region, the first set temperature is -10 ° C and the second set temperature is -15 ° C. 7. The ventilator according to claim 4, wherein when the place of use is an extremely cold region, the first set temperature is -15 ° C and the second set temperature is -20 ° C. 8. The ventilation according to claim 1, wherein the control device is provided with temperature setting means capable of arbitrarily setting the first set temperature and the second set temperature. apparatus. 9. The control device is provided with temperature / humidity detection means for detecting temperature / humidity of a place where the ventilation device is installed, and automatically sets the first set temperature and the second set temperature according to the detected temperature / humidity. The ventilation device according to any one of claims 1 to 3, further comprising temperature setting means. 10. The test operation means for continuously operating the air supply blower for a predetermined time regardless of the outside air temperature detected by the outside air temperature detecting means. Ventilation device according to.