JP5402161B2 - Heat exchange ventilator - Google Patents

Description

  The present invention relates to a heat exchange type ventilator that is used in a cold district or the like and performs heat exchange between an exhaust flow for exhausting indoor air to the outside and an air supply air for supplying outdoor air to the room.

This type of heat exchange type ventilator is adjacent in the flow path in the heat exchanger in which a warm exhaust flow from the room flows when the outdoor temperature becomes low, for example, −10 ° C. or lower in winter. Although it freezes and clogs due to the influence of cold supply air that is ventilated from outside into the supply air flow path, conventional heat exchange ventilators have been configured to prevent clogging due to freezing. (For example, refer to Patent Document 1).

  Moreover, in an area where the outdoor temperature is extremely low such as −25 ° C., there is actually no heat exchange type ventilator for practical use.

  Hereinafter, the heat exchange type ventilator disclosed in Patent Document 1 will be described with reference to FIG.

  As shown in FIG. 12, the heat exchanger unit 101 performs heat exchange ventilation between indoor air and outdoor air, and the heat exchanger unit 101 exhausts the heat exchanger 102 and indoor air to the outside. The exhaust path 103 passing through the heat exchanger 102, the outdoor air is supplied into the room, the air supply path 104 passing through the heat exchanger 102, the exhaust fan 105 incorporated in the exhaust path 103, and the air supply path An air supply fan 106 incorporated in the air conditioner 104, a temperature sensor 107 that detects the outside air temperature of the outdoor air, and a control unit that controls the operation of the exhaust fan 105 and the air supply fan 106 according to the outside air temperature detected by the temperature sensor 107 are provided. ing.

  And the control part of the heat exchanger unit 101 performs two freezing suppression control according to outside air temperature, in order to suppress that the heat exchanger 102 freezes, when outside temperature falls below -10 degreeC, and this 2 The two freeze suppression controls are the first freeze suppression control and the second freeze suppression control.

  The first freezing suppression control is a control for suppressing freezing of the heat exchanger 102 when the outside air temperature falls below −10 ° C., and the exhaust fan 105 is always operated and the operation of the air supply fan 106 is performed for 60 minutes. Repeat the operation to pause for the first 15 minutes.

  The second freezing suppression control is a control that suppresses freezing of the heat exchanger 102 more strongly than the first freezing suppression control when the outside air temperature falls below −15 ° C., and the exhaust fan 105 and the supply fan 106 are controlled. Perform intermittent operation. In the second freezing suppression control, the exhaust fan 105 and the air supply fan 106 are paused for 60 minutes and then restarted for 5 minutes.

Japanese Patent No. 3744409

  In a conventional heat exchange device, when operating outdoors in a cold region where the outdoor temperature is very low, condensation occurs in the exhaust air flow path of the heat exchanger between the air containing warm indoor air and the outdoor low-temperature air. Will occur. If the operation is continued as it is, the condensed water gradually accumulates in the exhaust flow path, and if the operation is further continued, the condensed water freezes and the exhaust flow path is blocked, so that the exhaust cannot be performed.

  Therefore, it is possible to prevent condensation or freezing in the exhaust flow path by temporarily stopping only the air supply / air blowing means, or both the air supply / air blowing means and the exhaust air blowing means. When the air pressure is stopped, the room becomes negative pressure and the outdoor air flows from the gaps between the buildings, causing cold drafts and condensation in the indoor space.When both the air supply and exhaust air blowing means are stopped, It was difficult to secure the necessary ventilation volume in the room.

  For this reason, in conventional heat exchange air devices, in order to avoid the effects of condensation and freezing, suppress cold drafts and condensation in the indoor space and maintain the necessary ventilation, while maintaining the original heat exchange ventilation, Multiple heat exchange air structures are provided in the exchange air device, heat exchange air operation that ventilates while exchanging heat between outdoor air and indoor air, and condensation and freezing of the exhaust flow path of the heat exchanger are eliminated by indoor air The heat exchange air can be continued by sequentially switching the defrosting operation of the heat exchanger to be performed, but there is a problem that the apparatus is enlarged by providing a plurality of heat exchange air structures.

  The present invention solves such a problem, and even when operating in a cold region in winter when the outdoor temperature is extremely low, a plurality of heat exchangers can be switched and used. It is possible to continue the original heat exchange ventilation while avoiding the effects of freezing, and to provide a mechanism that can change the connection between the heat exchanger and the air blowing means, so that it can be used in conventional cold districts. It aims at providing the heat exchange apparatus which can implement | achieve size reduction from the corresponding apparatus.

In order to achieve this object, the present invention includes an outdoor suction port that sucks outdoor air from the outside, an indoor suction port that sucks indoor air from the indoor space, an outdoor discharge port that exhausts indoor air to the outdoor space, and the outdoor A main body box having an indoor air supply port for supplying the air is provided with an air supply passage for allowing outdoor air to flow and an exhaust passage for allowing indoor air to flow, and the outdoor air and the exhaust flowing through the air supply passage are provided. A plurality of heat exchangers for exchanging heat with indoor air flowing through the flow path, sucking outdoor air and supplying air into the room through the supply flow path, sucking indoor air, and exhausting the air Exhaust air blowing means for exhausting the air through the flow path, and circulation air blowing means for sucking indoor air and circulating the air through the exhaust flow path to the room. Heat exchange And a selection means for selecting the heat exchanger to be connected to the supply air blower means, the exhaust blower means, and the circulation blower means. A selection means for selecting a heat exchanger connected to the supply air blowing means, comprising a supply air exhaust motor for driving the supply air blowing means and the exhaust ventilation means, and a circulation prime mover for driving the circulation ventilation means. A first air direction adjusting plate, the first air direction adjusting plate can select and switch a heat exchanger connected to the air supply / air blowing means, and the air supply / air blowing means is connected to all the heat exchangers. can, the circulation motor, when the air supply blowing means is connected to all of the heat exchanger is a heat exchanger type ventilating device comprising that you stopped.

  According to the present invention, even when the outdoor is operated in a cold region where the temperature is extremely low, by using a plurality of heat exchangers, the influence of freezing inside the heat exchanger can be avoided and the original effect can be avoided. Heat exchange ventilation can be carried out continuously, and further, by providing a mechanism that can connect the heat exchanger and the blowing means, it is possible to reduce the size compared to conventional cold district devices. At the same time, the number of blowing means can be minimized.

  In addition, by separating the air supply / exhaust air blowing means and the circulation air blowing means for the defrost operation separately from each other, the motor for the circulation air blowing means for the defrost operation is stopped when the defrost operation is not required. In addition, it is possible to control the circulating air blowing means for defrost operation, and to keep the original heat exchange ventilation continuously, the power used for defrost operation can be minimized and the power consumption of the heat exchange device can be reduced. be able to.

(A) Embodiment 1 in the present invention, horizontal sectional view showing a heat exchange type ventilator during normal heat exchange air operation, (b) Embodiment 1 in the present invention, during normal heat exchange air operation Vertical sectional view showing a heat exchange type ventilator The horizontal sectional view and the vertical sectional view showing the heat exchange type ventilator during the heat exchange air operation at the time of the first defrost operation and the second freezing The horizontal sectional view and the vertical sectional view showing the heat exchange type ventilator during the second defrost operation and the heat exchange air operation during the first freezing (A) Schematic horizontal sectional view showing the second wind direction adjusting plate of Embodiment 10 in the present invention, (b) Schematic vertical sectional view showing the second wind direction adjusting plate of Embodiment 10 in the present invention, (c) Book Schematic exploded perspective view showing the second wind direction adjusting plate of Embodiment 10 in the invention (A) Horizontal sectional view showing a heat exchange type ventilator according to a thirteenth embodiment of the present invention, (b) Vertical sectional view showing a heat exchange type ventilator according to a thirteenth embodiment of the present invention. The horizontal sectional view and the vertical sectional view showing the heat exchange type ventilator of the fourteenth embodiment The horizontal sectional view and the vertical sectional view showing the heat exchange type ventilation apparatus of the fifteenth embodiment The horizontal sectional view and the vertical sectional view showing the heat exchange type ventilation apparatus of the sixteenth embodiment Schematic exploded perspective view showing a heat exchanger and a dish-like structure of Embodiment 17 in the present invention Schematic sectional view showing a conventional heat exchanger unit

The heat exchange ventilator according to claim 1 of the present invention includes an outdoor suction port for sucking outdoor air from the outside, an indoor suction port for sucking indoor air from the indoor, and an outdoor discharge port for discharging indoor air to the outdoor. An outdoor air flowing in the air supply passage is provided in the main body box having an indoor air supply port for supplying outdoor air into the room, and includes an air supply passage for passing outdoor air and an exhaust passage for letting indoor air flow. A plurality of heat exchangers for exchanging heat with the indoor air flowing through the exhaust flow path, sucking outdoor air, and supplying air into the room through the air supply flow path, and sucking indoor air An exhaust air blowing means for exhausting air outside the room through the exhaust flow path, and a circulation air blowing means for sucking indoor air and circulating the air through the exhaust flow path to the room, and the air supply air blowing means and the exhaust air blowing means, Any of the heat And a selection means for selecting the heat exchanger to be connected to the supply air blowing means, the exhaust air blowing means, and the circulation air blowing means. A selection comprising a supply air / exhaust prime mover for driving the supply / air supply means and the exhaust / air supply means and a circulation prime mover for driving the circulation blower means , and selecting a heat exchanger connected to the supply / air supply means A first wind direction adjusting plate, which is a means, and the first wind direction adjusting plate can select and switch a heat exchanger connected to the air supply / air blowing means, and the air supply / air blowing means is connected to all the heat exchangers. The circulation prime mover is configured to stop when the supply air blowing means is connected to all the heat exchangers , and the outdoor temperature becomes extremely low, causing condensation and freezing in the heat exchanger. When heat exchange becomes difficult, multiple heat Heat exchanger air operation and heat exchanger air operation and defrost operation are sequentially switched by a converter, so that the original heat exchange ventilation can be continued, and the heat exchanger and the defrost used for the heat exchanger air operation By making the air supply means combined with the heat exchanger used for operation in common, there is no need to arrange the air supply means for each heat exchanger and for each purpose, the air supply means can be reduced and the size can be reduced, Since the supply air exhaust means for driving the heat exchange air operation and the supply air exhaust motor for driving the exhaust air ventilation means and the circulation prime mover for driving the circulation air blow means for performing the defrost operation are separated, the heat exchange air When only driving | running | working, the said circulation ventilation means can be stopped and power consumption can be reduced.

  Moreover, it is the structure provided with the 1st wind direction adjustment board which is a selection means which selects the heat exchanger connected with an air supply ventilation means, and heat exchange air operation | movement is selected by selecting the heat exchanger which an air supply ventilation means ventilates. The defrosting operation of the heat exchanger can be switched, and the original heat exchange ventilation can be continued by avoiding the influence of freezing inside the heat exchanger.

  Further, the first air direction adjusting plate can select and switch the heat exchanger connected to the supply air blowing means, and the supply air blowing means can be connected to all the heat exchangers. Thus, it is possible to switch so that the supply air blowing means passes through at least one heat exchanger with a simple configuration, and switching between the heat exchange air operation and the defrost operation of the heat exchanger can be easily performed.

  The circulation prime mover is configured to stop when the supply air blowing means is connected to all the heat exchangers. When the heat exchange air operation is performed in all the heat exchangers, the circulation blowing means and the circulation which are not used are used. It is possible to stop the prime mover and reduce power consumption.

Further, the heat exchanger type ventilation system according to claim 2, the air supply blowing means draws air from the air supply channel, while arranged to supply air into the room, the air exhaust blowing means from the exhaust passage It is configured to be sucked in and exhausted to the outside of the room. With this arrangement, the supply air blowing means and the exhaust blowing means move the air with the negative pressure in the supply air flow path and the exhaust flow path, respectively, and the heat exchange By adjusting the wind inflow distribution of the heat exchanger, the pressure difference between the air passages of the heat exchanger can be reduced, so that the leakage of wind between the exhaust passage and the air supply passage can be reduced.

The heat exchanger type ventilation system according to claim 3 has a configuration air supply exhaust prime mover is disposed in the wind path formed by the air supply blowing means, the air supply into the room after heat exchange It can be warmed by the exhaust heat of the supply / exhaust prime mover, and the temperature of the air supplied to the room can be raised.

The heat exchanger type ventilation system according to claim 4 sucks air circulation blower means from the exhaust passage, a configuration arranged to exhaust the chamber, an exhaust passage which is driven by a circulation blower means Is set to a negative pressure to prevent high-humidity indoor air from flowing from the exhaust passage into the low-temperature air supply passage during operation of the circulating air blowing means, and condensation or freezing occurs in the air supply passage. This can be suppressed.

The heat exchanger type ventilation system according to claim 5 has a structure in which circulation motor is installed in the wind path formed by the circulation blower means, circulating engine air to supply air into the room after heat exchange It can be warmed by the exhaust heat, and the temperature of the air exhausted into the room can be raised.

The heat exchanger type ventilation system according to claim 6 is a small structure of volume than the impeller of the impeller of the circulation blower means supply air blowing means and exhaust blowing means, air circulating blower means is driven Since the road has no duct piping compared to the air passage driven by the air supply and exhaust air blowing means and the ventilation resistance is low, the static pressure required for air blowing is reduced, so the air blowing performance is reduced by reducing the volume of the impeller The heat exchange type ventilator can be downsized without damaging it. In addition, by reducing the volume of the impeller, the power required for driving can be reduced and the power consumption can be reduced.

The heat exchanger type ventilation system according to claim 7, the first wind direction adjusting plate, and an outdoor suction port is configured to include between the heat exchanger, the heat exchanger is connected to the circulating blower means By preventing the outside air from flowing in, it is possible to suppress the temperature of the heat exchanger from being lowered during the defrost operation by the circulating air blowing means, so that the efficiency of the defrost operation can be increased.

In addition, the heat exchange type ventilator according to claim 8 is configured to reduce the rotation speed of the supply / exhaust prime mover when the first wind direction adjusting plate switches the connection between the supply / air supply means and the heat exchanger. , Suppresses a decrease in the supply air temperature due to non-uniform flow of outdoor air into the plurality of heat exchangers during the switching of the first air direction adjusting plate, and suppresses a decrease in the heat exchange efficiency of the supply air it can.

Further, the heat exchanger type ventilation system of claim 9, a configuration in which a second airflow direction adjusting plate is a selection means for selecting a heat exchanger connected to the exhaust blower unit and the circulation blower means, a simple structure Thus, the heat exchanger to be ventilated by the exhaust air blowing means and the circulation air blowing means can be switched, and the heat exchange air operation and the defrost operation of the heat exchanger can be easily switched.

Further, in the heat exchange ventilator according to claim 10 , the second wind direction adjusting plate is configured such that the connection between the circulating air blowing means and all the heat exchangers can be cut off, and the heat is exchanged in all the heat exchangers. When the exchange air operation is performed, the indoor air can be prevented from leaking from the air passage formed by the circulation air blowing means to the air passage formed by the exhaust air blowing means.

The heat exchanger type ventilation system of claim 11 drives when circulation prime mover is circulation blowing means by the second wind direction adjusting plate connected to the heat exchanger, the circulating blown by the second wind direction adjusting plate When the means is not connected to the heat exchanger, it is configured to stop. When the heat exchange operation is performed in all the heat exchangers, the circulation fan means and the circulation prime mover that are not used are stopped to reduce power consumption. be able to.

Further, in the heat exchange type ventilator according to claim 12 , the second air direction adjusting plate is connected to the heat exchanger to which the exhaust air blowing unit is connected to the air supply air blowing unit in accordance with the switching of the first air direction adjusting plate. And the circulation air blowing means is configured to switch to connect to the heat exchanger to which the air supply air blowing means and the exhaust air blowing means are not connected, and by using a plurality of heat exchangers and an airflow direction adjusting plate, Switching between the heat exchanger that connects the air supply and exhaust air means and performs the heat exchange operation and the heat exchanger that connects the circulation air means and performs the defrost operation of the heat exchanger can be easily performed with a simple configuration. Therefore, the apparatus can be downsized and the heat exchange air operation can be continued reliably.

Moreover, the heat exchange type ventilator according to claim 13 immediately after the second wind direction adjusting plate connects the circulating air blowing means and the heat exchanger or immediately after switching the heat exchanger connected to the circulating air blowing means. The temperature of the wind blown into the room after defrosting is increased by increasing the defrost air volume when starting the defrost operation with the heat exchanger cooled by the outside air. Reduction can be reduced.

The heat exchanger type ventilation system according to claim 14, in between the outlet of the exhaust air flow path of the outdoor outlet comprises condensation detecting means capable of detecting the state of condensation or freezing, the detection value of said condensation detecting means This reduces the rotational speed of the supply / exhaust prime mover and increases the rotational speed of the circulating prime mover.When condensation or freezing occurs in the heat exchanger, the heat exchange air operation is continued until the condensation or freezing is dried. Defrost efficiency can be increased by reducing the air volume and increasing the air volume during defrost operation.

The heat exchanger type ventilation system of claim 15, comprising a temperature detecting means for detecting the temperature of the air in chamber air inlet, the temperature temperature is in a predetermined air supplied from the indoor air supply opening When the air supply temperature is lower, the rotation speed of the supply / exhaust prime mover is decreased and the rotation speed of the circulation prime mover is increased.When the supply air temperature is too low, the supply / exhaust air volume is decreased to increase the heat exchange efficiency. The occurrence of condensation and freezing in the heat exchanger can be suppressed.

The heat exchange ventilator according to claim 16 is configured to include an air passage shielding means for preventing outdoor air from flowing into the air supply flow path, and when the ventilation operation is not performed, Freezing of the heat exchanger due to the entry of outside air can be suppressed.

The heat exchanger type ventilation system according to claim 17, during operation of the circulation motor is mixed with outdoor air sent into the room by the air supply blowing means, the indoor air sent into the room by the circulation blower means The temperature of the air supplied into the room can be raised by the air sucked from the room by the circulating air blowing means, and the temperature drop in the space near the indoor air supply port can be suppressed.

The heat exchange ventilator according to claim 18 , wherein the heat exchanger is configured such that the inlet of the exhaust passage opens vertically downward, and the outlet of the exhaust passage is vertically upward compared to the inlet. And when dew condensation water is generated in the exhaust flow channel, the dew condensation water in the heat exchanger is discharged from the exhaust flow channel to the inlet of the exhaust flow channel by gravity. It is possible to suppress the condensed water from flowing into the wind direction adjusting plate, the exhaust air blowing means or the circulation air blowing means.

The heat exchanger type ventilation system of claim 19, vertically downward in the inlet of the exhaust air flow path is a configuration in which dish-like structure is arranged, condensed water is generated in the exhaust passage In this case, the condensed water can be prevented from flowing out into the room, and the condensed water can be dried by the room air passing through the dish-like structure. Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
In the present invention, two sets of at least one heat exchanger are used. However, in the following embodiments, for convenience, any one of the heat exchangers described in claim 1 is used as the first heat exchanger 23. The other heat exchanger described in 1 is also described as the second heat exchanger 24 by one unit. The form using a plurality of heat exchangers will be described later.

  1-3 is a horizontal cross-sectional view of the heat exchange ventilator, and (b) is a vertical cross-sectional view of the heat exchange ventilator. In FIG. 1, the figure which performs heat exchange air operation using two heat exchangers is shown, and in FIG. 2 and FIG. 3, the figure which performs heat exchange air operation using one side of two heat exchangers is shown. .

  As shown in FIG. 1, the heat exchange ventilator is constituted by a main body box 5 having an outdoor suction port 1, an indoor suction port 2, an outdoor discharge port 3, an indoor air supply port 4, and a circulating air discharge port 22. . Air sucked from the outdoor suction port 1 is supplied from the indoor air supply port 4, and air sucked from the indoor suction port 2 is discharged from the outdoor discharge port 3 or the circulating air discharge port 22.

  The main body box 5 includes a first heat exchanger 23 and a second heat exchanger 24, and the first heat exchanger 23 has a first air supply passage 25 that allows outdoor air to flow and a first air that allows indoor air to flow. An exhaust passage 26 is provided, and the second heat exchanger 24 includes a second air supply passage 27 that ventilates outdoor air and a second exhaust passage 28 that ventilates indoor air.

  In addition, the air supply means 9, the exhaust air supply means 10, and the circulation air supply means 11 are provided as the air supply means. For example, a centrifugal fan or an axial flow fan is used as the air supply means. A supply / exhaust prime mover 12 and a circulation prime mover 13 are provided as prime movers for driving the blowing means, and a first wind direction adjusting plate 14 and a second wind direction adjusting plate 15 are provided as selection means for selecting a heat exchanger connected to the blowing means. It is a configuration.

  Further, the main body box 5 includes an air supply passage 29 for supplying outdoor air into the room by an air supply / air blowing means 9 fixed to the rotation shaft of the air supply / exhaust motor 12, and an air supply / exhaust motor 12. The exhaust air blowing means 10 fixed to the rotating shaft of the exhaust air blows out the indoor air through the exhaust air flow path 30 and the circulating air blowing means 11 fixed to the rotating shaft of the circulation motor 13 heats the indoor air. It is the structure provided with the circulation air flow path 31 which ventilates the exchanger and ventilates the circulation air flow circulated into the room from the circulation air discharge port 22.

  The first wind direction adjusting plate 14 connects either one or both of the first heat exchanger 23 and the second heat exchanger 24 to the outdoor suction port 1, and the second wind direction adjusting plate 15 is connected to the first heat exchanger 23. The second heat exchanger 24 is connected to at least one of the exhaust air blowing means 10 and the circulation air blowing means 11, respectively.

  When condensation or freezing does not occur in the exhaust flow path 30, a normal heat exchange air operation that is a heat exchange operation using the first heat exchanger 23 and the second heat exchanger 24 is performed, and the first exhaust flow path is performed. When dew condensation or freezing occurs in at least one of 26 or the second exhaust flow path 28, a defrost operation, which is an operation for drying the dew condensation or freezing of either exhaust flow path, is performed while continuing the heat exchange air operation. .

  At this time, for example, when the ventilation airflow is not changed in the normal heat exchange air operation and the defrost operation, the airflow combined with the airflow flowing through the first heat exchanger 23 and the second heat exchanger 24 in the normal heat exchange air operation. Since the flow rate of the same heat exchanger may differ between the normal heat exchange air operation and the heat exchange air operation during the defrost operation so that the air flow may flow through the heat exchanger that performs the heat exchange air operation during the defrost operation, the defrost operation The internal heat exchange air operation is distinguished from the normal heat exchange air operation, and is described as a heat exchange air operation during freezing hereinafter.

  When performing the defrost operation which dries the 1st heat exchanger 23, the heat exchange air operation at the time of freezing is performed with the 2nd heat exchanger 24, and this state is made into the 1st defrost operation. When performing the defrost operation which dries the 2nd heat exchanger 24, the heat exchange air operation at the time of freezing is performed with the 1st heat exchanger 23, and this state is made into the 2nd defrost operation.

  A normal heat exchange air operation in the heat exchange ventilator configured as described above will be described below with reference to FIG.

  The outdoor air is sucked from the outdoor suction port 1 into the main body box 5 according to the air supply path 29, passes through the first air supply passage 25 and the second air supply passage 27 connected by the first air direction adjusting plate 14, and is supplied. Air is supplied into the room through the air supply port 4 by the air blowing means 9.

  The indoor air is sucked into the main body box 5 from the indoor suction port 2 according to the exhaust flow path 30, and after passing through the first exhaust flow path 26 and the second exhaust flow path 28, is connected by the second wind direction adjusting plate 15. Then, the air is sent to the outdoor discharge port 3 by the exhaust air blowing means 10 and discharged outside the room.

  At this time, outdoor air passed through the first air supply passage 25 and the second air supply passage 27 by the air supply and blowing means 9 and the first exhaust passage 26 and the second exhaust passage 28 through the exhaust air blowing means 10. Each of the indoor air to be exchanged heats. Here, only the supply / exhaust prime mover 12 needs to be operated, and the circulation prime mover 13 need not be operated.

  If the heat exchange air operation described with reference to FIG. 1 is continued in a cold region where the outdoor temperature is extremely low, the air containing the indoor warm humidity is cooled by exchanging heat with the extremely low temperature outdoor air. Condensation is gradually condensed and frozen in the first exhaust passage 26 and the second exhaust passage 28. Condensation and freezing will narrow the air path and increase the heat resistance of the heat exchanger, and the heat transfer plate will have a water or ice layer on the surface of the heat exchanger to reduce the heat conductivity of the heat transfer plate. As a result, the heat exchange function declines and the original heat exchange operation cannot be continued.

  Therefore, the defrosting operation in the heat exchange type ventilator configured as described above will be described below with reference to FIGS.

As shown in FIG. 2, in the first defrost operation, indoor air is sucked into the main body box 5 from the indoor suction port 2 according to the circulating air flow path 31, and passes through the first exhaust flow path 26. After the condensation and freezing of 26 are melted and dried, they are connected to the circulating air blowing means 11 by the second air direction adjusting plate 15 and discharged from the circulating air discharge port 22 into the room by the circulating air blowing means 11.
At the same time, heat exchange air operation during freezing is performed in the second heat exchanger 24, the outdoor air inlet 1 is connected only to the second heat exchanger 24 by the first air direction adjusting plate 14, and ventilation is performed by the air supply / air blowing means 9. After the outdoor air is sucked from the outdoor suction port 1, it passes through the second air supply passage 27 and is supplied into the room from the indoor air supply port 4.

  The second air direction adjusting plate 15 connects the exhaust air blowing means 10 and the second heat exchanger 24, and the indoor air ventilated by the exhaust air blowing means 10 is sucked from the indoor air inlet 2 and then the second exhaust flow. After passing through the passage 28 and exchanging heat with outdoor air passing through the second air supply passage 27, the air is discharged from the outdoor discharge port 3.

  Promoting the dew condensation and freezing of the first exhaust passage 26 to be melted and dried by allowing only the indoor warm air to pass through the first heat exchanger 23 without passing the outdoor air through the first defrost operation. The effects of condensation and freezing in the first exhaust flow path 26 can be recovered in a short time. At the same time, in the second heat exchanger 24, since the heat exchange air operation during freezing is performed, the heat exchange air operation can be continued.

  As shown in FIG. 3, in the second defrost operation, the indoor air is sucked into the main body box 5 from the indoor suction port 2 according to the circulating air flow path 31 and passes through the second exhaust flow path 28, so that the second exhaust flow After the condensation and freezing of the passage 28 are melted and dried, the second air direction adjusting plate 15 connects to the circulating air blowing means 11, and the circulating air blowing means 11 discharges the indoor air from the circulating air discharge port 22.

  At the same time, heat exchange air operation during freezing is performed in the first heat exchanger 23, the outdoor air inlet 1 is connected only to the first heat exchanger 23 by the first air direction adjusting plate 14, and is ventilated by the air supply / air blowing means 9. After the outdoor air is sucked from the outdoor suction port 1, it passes through the first air supply passage 25 and is supplied into the room from the indoor air supply port 4.

  The second air direction adjusting plate 15 connects the exhaust air blowing means 10 and the first heat exchanger 23, and the indoor air ventilated by the exhaust air blowing means 10 is sucked from the indoor air inlet 2 and then the first exhaust air. After passing through the flow path 26 and exchanging heat with outdoor air passing through the first air supply flow path 25, the heat is discharged from the outdoor discharge port 3.

  Promoting the dew condensation and freezing of the second exhaust passage 28 to be melted and dried by allowing only the indoor warm air to pass through the second heat exchanger 24 without passing the outdoor air through the second defrost operation. Thus, the influence of condensation or freezing in the second exhaust flow path 28 can be recovered in a short time. At the same time, in the first heat exchanger 23, since the heat exchange air operation at the time of freezing is performed, the heat exchange air operation can be continued.

  By alternately performing the first defrost operation and the second defrost operation, the influence of condensation or freezing generated in the first exhaust passage 26 and the second exhaust passage 28 is recovered, and the outdoor temperature becomes extremely low. The original heat exchange air operation can be continued even in a cold region.

  Further, by using the first air direction adjusting plate 14 and the second air direction adjusting plate 15 in combination, the heat exchange air operation is performed for the two heat exchangers of the first heat exchanger 23 and the second heat exchanger 24. By providing one set of the air supply / air blowing means 9 and the exhaust air blowing means 10 necessary for the defrosting operation and the circulation air blowing means 11 necessary for the defrost operation, the function of continuing the original heat exchange air operation in a cold region can be achieved. Therefore, compared with the structure provided with two or more conventional heat exchange air structures, it can reduce an air blower and can reduce the whole apparatus in size.

  Further, the supply / exhaust prime mover 12 that drives the supply / air blowing means 9 and the exhaust blower means 10 necessary for the heat exchange air operation and the circulation prime mover 13 that drives the circulation blower means 11 necessary for the defrost operation are different. Therefore, in the normal heat exchange air operation, the circulation prime mover 13 can be stopped to reduce power consumption.

  Further, when two heat exchangers are used as described above, the heat exchange efficiency and ventilation resistance of the paired heat exchangers are made uniform so that the heat to be paired in the air path configuration and the motor speed control described below are matched. Since the exchangers can be treated as equivalent, the configuration or control is simplified, which is more preferable.

  In addition, the heat exchanger molded as one heat exchanger is divided into two parts in terms of roles, and a separate air supply passage and exhaust passage are provided for each part, so that one part is the first part. Even if the heat exchanger 23 and the other part are used as the second heat exchanger 24, the same effect can be obtained.

  In the present embodiment, the first heat exchanger 23 and the second heat exchanger 24 are each described as one unit. However, when there are a plurality of first heat exchangers 23, for example, a plurality of air supply channels and The same effect can be obtained by connecting the exhaust passages to the same blowing means.

(Embodiment 2)
In the following, in the air supply path 29, the outdoor suction port 1 is upstream, the indoor air supply port 4 is downstream, and in the exhaust flow path 30, the indoor suction port 2 is upstream and the outdoor discharge port 3 is downstream.

  As shown in FIG. 1, the air supply / air blowing means 9 is installed on the downstream side of the first heat exchanger 23 and the second heat exchanger 24 and upstream of the indoor air supply port 4. 9 sucks air from one or both of the first air supply passage 25 and the second air supply passage 27 and supplies the air from the indoor air supply port 4 into the room.

  Further, the exhaust air blowing means 10 is installed on the downstream side of the second air direction adjusting plate 15 and on the upstream side of the outdoor discharge port 3, so that the exhaust air blowing means 10 has the first exhaust flow path 26 and the second exhaust flow path 28. The air is sucked from one or both of them, and discharged from the outdoor discharge port 3 to the outside.

  By installing the air supply / air blowing means 9 and the exhaust air blowing means 10 in such a configuration, the air supply / air blowing means 9 sucks air from one or both of the first air supply passage 25 and the second air supply passage 27. Therefore, the air supply flow path connected to the air supply / air blowing means 9 can be set to a negative pressure.

  In addition, since the exhaust air blowing means 10 sucks air from one or both of the first exhaust flow path 26 and the second exhaust flow path 28, the exhaust flow path connected to the exhaust air blowing means 10 is set to a negative pressure. Can do.

  The heat exchanger that is ventilated by the air supply / air blowing means 9 and the exhaust air blowing means 10 is common, and by this configuration, both the air supply flow path and the exhaust flow path included in the heat exchanger can be made negative pressure. The flow distribution of the wind in the vessel is uniform, the pressure difference between the air supply flow path and the exhaust flow path can be reduced, and air leakage between the air supply flow path and the exhaust flow path can be suppressed.

  Further, although the air volume passing through the air supply path 29 and the air volume passing through the exhaust flow path 30 were not specified, since the same air supply / exhaust prime mover 12 is used, for example, when a centrifugal blower is used or an axial flow When a blower is used, the air flow can be adjusted to be equal by using the same impeller, and the pressure difference between the air supply flow path and the exhaust flow path can be further reduced.

(Embodiment 3)
As shown in FIG. 1, the supply / exhaust prime mover 12 is installed in an air supply path 29, which is an air path formed by the supply / air blowing means 9.

  Specifically, for example, a centrifugal blower is used as the air supply / air blowing means 9 and the exhaust air blowing means 10, and a biaxial motor on both sides is used as the air supply / exhaust motor 12, and the wall surface separating the air supply path 29 and the exhaust flow path 30 is used. A motor is installed on the air supply path 29 side. One of the rotating shafts of the motor is extended, the air supply / air blowing means 9 is installed near the center of the air supply passage 29, and the other rotation shaft is exhausted through the wall surface separating the air supply passage 29 and the exhaust flow passage 30. The structure which extends to the flow path 30 and installs the exhaust air blowing means 10 near the center of the exhaust flow path 30 is raised.

  By installing the air supply / exhaust prime mover 12 in such a configuration, the air supply path 29 after heat exchange in the heat exchanger can be warmed by the exhaust heat of the air supply / exhaust prime mover 12, and as a result, The temperature of the air that has passed through the heat exchanger can be further increased, and air can be supplied into the room from the indoor air supply port 4.

  The motor is embedded in the wall surface separating the air supply path 29 and the exhaust flow path 30, one of the rotating shafts is extended to the air supply path 29, and the air supply / air blowing means 9 is installed. You may install the exhaust ventilation means 10 by extending the other axis | shaft.

  In this case, the wall that separates the motor and the exhaust flow path 30 is insulated, and the wall that separates the motor and the air supply path 29 is made of a material that is not easily rusted and has high thermal conductivity, such as aluminum or copper, or the motor and the exhaust flow path. Compared to the wall separating 30, the wall separating the motor and the air supply path 29 is made thinner, or a part of the wall separating the motor and the air supply path 29 is removed to expose a part of the motor surface to the air supply path 29. With this configuration, the same effect can be obtained.

(Embodiment 4)
In the following, in the circulating air flow path 31, the indoor suction port 2 is the upstream, and the circulating air discharge port 22 is the downstream. As shown in FIG. 2 or FIG. 3, the circulating air blowing means 11 is installed on the downstream side of the second air direction adjusting plate 15 and on the upstream side of the circulating air discharge port 22, so that the circulating air blowing means 11 is in the first exhaust flow. Air is sucked from the passage 26 or the second exhaust passage 28 and discharged from the circulating air outlet 22 into the room.

  By installing the circulation blower means 11 in such a configuration, the circulation blower means 11 sucks air from the first exhaust flow path 26 or the second exhaust flow path 28, so that the exhaust connected to the circulation blower means 11. The flow path can be negative.

  The supply air flow path of the heat exchanger connected to the circulation blower means 11 is not connected to the blower means, so no pressure is applied, and air leakage occurs between the supply air flow path and the exhaust flow path of the heat exchanger. In this case, the leaked air flows from the air supply passage to the exhaust passage.

  When condensation or freezing occurs due to leaked air, condensation or freezing occurs in the exhaust flow path that is the destination of the leakage, so it is melted and dried by the warm indoor air sucked into the exhaust flow path by the circulating air blowing means 11. Can do. Therefore, even when air leakage occurs between the air supply passage and the exhaust passage of the heat exchanger, the defrosting operation can be continued.

(Embodiment 5)
As shown in FIG. 2, the circulation prime mover 13 is installed in a circulation air flow path 31 that is in an air passage formed by the circulation blower unit 11.

  Specifically, for example, a centrifugal blower is used as the circulation blower means 11, a single-axis motor is used as the circulation prime mover 13, a motor is installed on the wall surface of the circulation air flow path 31, and the rotation shaft is extended therefrom. The structure which installs the circulation ventilation means 11 near the center of the circulation airflow path 31 is mention | raise | lifted.

  By installing the circulation prime mover 13 with such a configuration, the circulation air flow path 31 after the heat exchange is performed in the heat exchanger can be warmed by the exhaust heat of the circulation prime mover 13, and as a result, the heat exchange The temperature of the indoor air that has passed through the container can be further raised and discharged from the circulating air outlet 22 into the room.

  It should be noted that a centrifugal blower is used as the circulation blower 11, a single-axis motor is used as the circulation prime mover 13, a motor is embedded inside the wall surface of the circulation air flow path 31, and the shaft is extended to the circulation air flow path 31. Then, the circulating air blowing means 11 may be installed.

  In this case, the wall separating the motor and the circulating air flow path 31 is made of a material having high heat conductivity such as aluminum or copper, or the wall separating the motor and the air supply path 29 is made thin, or the wall is The same effect can be obtained by removing a part of the motor surface and exposing a part of the motor surface to the air supply path 29.

(Embodiment 6)
As shown in FIG. 1, the impeller of the circulating air blowing means 11 is configured to have a smaller volume than the impellers of the air supply and air blowing means 9 and the exhaust air blowing means 10.

  Specifically, for example, a centrifugal blower is used as the air supply / air blowing means 9, the exhaust air blowing means 10, and the circulation air blowing means 11, and at least one of the outer diameter of the impeller or the thickness of the impeller of the circulation air blowing means 11 is supplied as the air supply / air blowing means. 9 and the exhaust air blowing means 10 are smaller than the impeller, and the casing of the circulation air blowing means 11 is reduced.

  Since the circulating air flow path 31 driven by the circulating air blowing means 11 has no duct piping compared to the air supply air flow path 29 and the exhaust air flow path 30 driven by the air supply air blowing means 9 and the exhaust air blowing means 10, the ventilation resistance is low. By adopting this configuration, the volume of the circulating air blowing means 11 can be reduced, the heat exchange type ventilator can be downsized without impairing the performance, and the power required for driving the circulating air blowing means 11 can also be reduced. Therefore, power consumption can be reduced.

(Embodiment 7)
As shown in FIGS. 1 to 3, the first air direction adjusting plate 14 is connected to the first heat exchanger 23 and the second downstream of the outdoor suction port 1 as a selection means for selecting a heat exchanger to be connected to the blower means. Provided upstream of the heat exchanger 24. The first air direction adjustment plate 14 connects the outdoor suction port 1 and either one or both of the first heat exchanger 23 and the second heat exchanger 24 to form the air supply path 29, and the first heat exchange. The supply air blowing means 9 is configured to be able to ventilate either one or both of the heat exchanger 23 and the second heat exchanger 24.

  Specifically, for example, a combination of a plate-like damper and a motor that rotates the damper is used as the first wind direction adjusting plate 14 as shown in FIGS. The air supply path 29 between the outdoor suction port 1 and the first air direction adjusting plate 14 is a single path, and the air supply path 29 on the downstream side of the first air direction adjusting plate 14 is connected to the first heat exchanger 23. The airflow path 29 and the airflow path 29 connected to the second heat exchanger 24 are configured as two independent paths.

  In the place where the air supply path 29 connected to the first heat exchanger 23 and the air supply path 29 connected to the second heat exchanger 24 are branched, a single plate-shaped damper rotates, so that the first heat exchanger 23 A position a that connects the connected air supply path 29 and shields the air supply path 29 connected to the second heat exchanger 24 and a supply air path 29 connected to the first heat exchanger 23 are shielded, and the second heat exchanger 24. All positions c connecting the air supply path 29 connected to the first heat exchanger 23 and the position b connecting the air supply path 29 connected to the second heat exchanger 24 are connected. It is set as the structure which can do.

  With this configuration, as shown in FIG. 3, when the first wind direction adjusting plate 14 takes the position a, the second defrost operation is performed. The outdoor air inlet 1 is connected to the first heat exchanger 23 by the first air direction adjusting plate 14, and the outdoor air is sucked from the outdoor air inlet 1 and then passes through the first air supply passage 25 to supply air. Air is supplied into the room through the air supply port 4 by the air blowing means 9. At the same time, the outdoor air inlet 1 is disconnected from the second heat exchanger 24 by the first air direction adjusting plate 14.

  In addition, the first heat exchanger 23 is connected to the exhaust air blowing means 10 by the second air direction adjusting plate 15, and the indoor air is sucked from the indoor suction port 2 and then passes through the first exhaust flow path 26. After exchanging heat with outdoor air passing through the first air supply passage 25, the air is discharged from the outdoor discharge port 3 by the exhaust air blowing means 10.

  The indoor air ventilated by the circulating air blowing means 11 is sucked into the main body box 5 from the indoor suction port 2 and melts and dries out condensation and freezing of the second exhaust passage 28 when passing through the second exhaust passage 28. Then, the air is guided to the circulating air blowing means 11 by the second air direction adjusting plate 15 and discharged from the circulating air discharge port 22 into the room by the circulating air blowing means 11.

  Further, as shown in FIG. 2, when the first wind direction adjusting plate 14 takes the position b, the first defrost operation is performed. The outdoor air inlet 1 is connected to the second heat exchanger 24 by the first air direction adjusting plate 14, and the outdoor air is sucked in from the outdoor air inlet 1 and then passes through the second air supply passage 27 to be supplied. Air is supplied into the room through the air supply port 4 by the air blowing means 9. At the same time, the outdoor air inlet 1 is disconnected from the first heat exchanger 23 by the first air direction adjusting plate 14.

  In addition, the second heat exchanger 24 is connected to the exhaust air blowing means 10 by the second air direction adjusting plate 15, and the indoor air passes through the second exhaust passage 28 after being sucked from the indoor suction port 2, After exchanging heat with outdoor air passing through the two air supply passages 27, the air is discharged from the outdoor outlet 3 by the exhaust air blowing means 10.

  The indoor air ventilated by the circulating air blowing means 11 is sucked into the main body box 5 from the indoor suction port 2 according to the circulating air flow path 31 and passes through the first exhaust flow path 26 to cause condensation in the first exhaust flow path 26. The freeze is thawed and dried, guided to the circulating air blowing means 11 by the second air direction adjusting plate 15, and discharged from the circulating air discharge port 22 into the room by the circulating air blowing means 11.

  Further, as shown in FIG. 1, when the first air direction adjusting plate 14 takes the position c, the normal heat exchange air operation is performed, and the outdoor air follows the air supply path 29 from the outdoor suction port 1 to the main body box. 5, is guided to the first air supply passage 25 and the second air supply passage 27 by the first air direction adjusting plate 14, and is supplied into the room from the indoor air supply port 4 by the air supply air blowing means 9.

  The indoor air is sucked into the main body box 5 from the indoor suction port 2 along the exhaust flow path 30, passes through the first exhaust flow path 26 and the second exhaust flow path 28, and then is exhausted by the second air direction adjusting plate 15. 10 and discharged from the outdoor discharge port 3 to the outside by the exhaust air blowing means 10.

  At this time, outdoor air passed through the first air supply passage 25 and the second air supply passage 27 by the air supply and blowing means 9 and the first exhaust passage 26 and the second exhaust passage 28 through the exhaust air blowing means 10. The indoor air that is used performs heat exchange.

  By providing the first wind direction adjusting plate 14 with such a configuration, the air supply path 29 can be switched by a simple configuration combining, for example, one plate-like damper and one motor that rotates the damper, thereby It is possible to easily switch between normal heat exchange air operation and defrost operation.

(Embodiment 8)
In contrast to the first embodiment shown in FIG. 1, the circulation prime mover 13 is configured to stop when the supply air blowing means 9 is connected to all the heat exchangers.

  Specifically, for example, when the first wind direction adjusting plate 14 takes the position c in the seventh embodiment, the circulation prime mover 13 is stopped.

  When the supply air blowing means 9 is connected to all the heat exchangers, the normal heat exchange air operation is performed, and the circulation blowing means 11 loses the necessity to operate. Since the circulation prime mover 13 that drives the circulation blower 11 is independent of the supply air exhaust prime mover 12 that drives the supply air blower 9 and the exhaust blower 10, only the circulation prime mover 13 can be stopped, and the power consumption of the entire apparatus Can be reduced.

(Embodiment 9)
In contrast to the first embodiment shown in FIG. 1, when the first air direction adjusting plate 14 connects the air supply / air blowing means 9 to the first heat exchanger 23 or the second heat exchanger 24, the rotation of the air supply / exhaust prime mover 12. The number is reduced to a predetermined time, for example, 10 seconds required for changing the damper, to a predetermined number of rotations, for example, 2/3 of the number of rotations during normal heat exchange operation.

  More specifically, for example, with respect to the seventh embodiment, the first wind direction adjusting plate 14 is switched from the position a to the position b or the position c or from the position b to the position a or the position c. In this case, or when the position c is switched to the position a or the position b, the rotational speed of the air supply / exhaust prime mover 12 is reduced to a predetermined rotational speed for a predetermined time. The air volume of the driven air is reduced.

  Air supply to the room due to the switching of the first wind direction adjusting plate 14 in a state of operating in a cold winter area without reducing the rotational speed of the air supply / exhaust prime mover 12 in a standard outdoor temperature environment in winter. The time during which the temperature drop is greatly observed is measured in advance, and the time during which the rotation speed of the supply / exhaust prime mover 12 is reduced so that the time during which the supply air temperature is greatly reduced can be minimized, and the rotation speed when the supply temperature decreases. Can be set in advance by experiment, calculation, or the like.

  With this configuration, the air flow rate in the air supply path 29 is reduced by reducing the rotational speed of the supply / exhaust prime mover 12, and the heat transfer plate area of the heat exchanger in contact with the unit volume of air per unit time is increased. Thus, the heat exchange efficiency of the heat exchanger alone in the first heat exchanger 23 and the second heat exchanger 24 can be increased.

  In addition, since air flows unevenly into the first heat exchanger 23 and the second heat exchanger 24 during the switching of the first air direction adjusting plate 14, the heat transfer area of the heat exchanger cannot be effectively used, The influence of the lowering of the air temperature can also be reduced. Due to the above effects, it is possible to suppress the temperature drop of the supplied air, which occurs due to the switching of the first wind direction adjusting plate 14.

(Embodiment 10)
As shown in FIGS. 1 to 3, the second wind direction adjusting plate 15 is disposed downstream of the first heat exchanger 23 and the second heat exchanger 24 as a selection means for selecting a heat exchanger connected to the air blowing means. And provided on the upstream side of the exhaust air blowing means 10 and the circulation air blowing means 11.

  The second air direction adjusting plate 15 connects the exhaust air blowing means 10 to either one or both of the first heat exchanger 23 and the second heat exchanger 24 to form the exhaust flow path 30, and the first heat exchange It is set as the structure which the exhaust ventilation means 10 can ventilate to either one or both of the heat exchanger 23 and the 2nd heat exchanger 24.

  At the same time, the second wind direction adjusting plate 15 connects the circulating air blowing means 11 to the heat exchanger not connected to the exhaust air blowing means 10, and the exhaust air blowing means 10 connects to the first heat exchanger 23 and the second heat exchanger 24. In this case, the second air direction adjusting plate 15 can block the connection between the circulating air blowing means 11 and the first heat exchanger 23 and the second heat exchanger 24.

  Specifically, for example, FIG. 4A shows a horizontal schematic cross-sectional view in the vicinity of the second wind direction adjusting plate 15 of the heat exchange type ventilator. The exhaust flow path 30 or the circulation air flow path 31 between the first heat exchanger 23 and the second air direction adjustment plate 15 and the exhaust flow path 30 or the circulation between the second heat exchanger 24 and the second air direction adjustment plate 15. The air flow path 31 is configured to be adjacent in the horizontal direction.

  FIG. 4B shows a schematic vertical sectional view in the vicinity of the second wind direction adjusting plate 15 of the heat exchange type ventilator. The exhaust flow path 30 between the second air direction adjusting plate 15 and the exhaust air blowing means 10 and the circulating air flow path 31 between the second air direction adjusting plate 15 and the circulating air blowing means 11 are adjacent to each other in the vertical direction.

  FIG. 4C is a schematic exploded perspective view depicting the vicinity of the second air direction adjusting plate 15 of the heat exchange type ventilator from the heat exchanger side. First heat exchanger 23-opening 34 connecting exhaust air blowing means 10, first heat exchanger 23-opening 35 connecting circulating air blowing means 11, second heat exchanger 24-opening 36 connecting exhaust air blowing means 10 , The second heat exchanger 24-a combination of a rice-shaped partition with two openings 37 connecting the circulating air blowing means 11, two plate-shaped dampers, and two motors for driving the dampers The second wind direction adjusting plate 15 is configured.

  Among the openings of the second wind direction adjusting plate 15, the opening 34 and the opening 35 are juxtaposed vertically in the vertical direction with respect to the partition located in the center when viewed in the horizontal direction on the heat exchanger side, and the opening 36 on the other side. The openings 37 are juxtaposed vertically in the vertical direction.

  Further, the opening 34 and the opening 36 are juxtaposed in the upper part in the vertical direction and the opening 35 and the opening 37 are juxtaposed in the lower part in the vertical direction with respect to the partition in the center as viewed in the vertical direction on the air blowing means side.

  The partition in the center as viewed in the vertical direction on the air blower side is the rotational axis of the two motors, and two plate-shaped dampers that can block either one of the upper and lower openings with respect to the rotational axis When the dampers are juxtaposed in the horizontal direction and the damper rotates, one damper opens and shields the openings 34 and 35, and the other damper opens and shields the openings 36 and 37.

  With the configuration shown in FIG. 4, the plate-like damper can rotate by passing through the upstream side of the second wind direction adjusting plate 15 in the exhaust flow path 30, and when the damper is shielded, the damper plate is the exhaust air blowing means. 10 or the circulating air blowing means 11 receives a negative pressure and is pressed against the opening of the second air direction adjusting plate 15, so that air can be prevented from leaking from the gap between the damper plate and the opening of the second air direction adjusting plate 15.

  The second air direction adjusting plate 15 connects the first heat exchanger 23 to the exhaust air blowing means 10, positions d connecting the second heat exchanger 24 to the circulation air blowing means 11, and circulation air blowing through the first heat exchanger 23. All the positions e where the second heat exchanger 24 is connected to the exhaust air blowing means 10 and the positions f where both the first heat exchanger 23 and the second heat exchanger 24 are connected to the exhaust air blowing means 10 are connected to the means 11. It can be taken.

  With this configuration, as shown in FIG. 3, when the second wind direction adjusting plate 15 takes the position d, the second defrost operation is performed, and the outdoor air inlet 1 is connected to the first heat exchanger 23 by the first wind direction adjusting plate 14. After the outdoor air is sucked in from the outdoor suction port 1, the outdoor air passes through the first air supply passage 25 and is supplied into the room from the indoor air supply port 4 by the air supply / air blowing means 9. At the same time, the outdoor air inlet 1 is disconnected from the second heat exchanger 24 by the first air direction adjusting plate 14.

  Further, the second air direction adjusting plate 15 connects the exhaust air blowing means 10 and the first heat exchanger 23, and the indoor air is sucked from the indoor suction port 2 and then passes through the first exhaust flow path 26. After exchanging heat with outdoor air passing through the first air supply passage 25, the air is discharged from the outdoor discharge port 3 by the exhaust air blowing means 10.

  The indoor air ventilated by the circulating air blowing means 11 is sucked into the main body box 5 from the indoor suction port 2 and melts and dries out condensation and freezing of the second exhaust passage 28 when passing through the second exhaust passage 28. Then, the air is guided to the circulating air blowing means 11 by the second air direction adjusting plate 15 and discharged from the circulating air discharge port 22 into the room.

  Further, as shown in FIG. 2, when the second wind direction adjusting plate 15 takes the position e, the first defrosting operation is performed, and the outdoor air inlet 1 is moved to the second heat exchanger 24 by the first wind direction adjusting plate 14. After being connected and being sucked in from the outdoor suction port 1, the outdoor air passes through the second air supply flow path 27 and is supplied into the room from the indoor air supply port 4 by the supply air blowing means 9. At the same time, the outdoor air inlet 1 is disconnected from the first heat exchanger 23 by the first air direction adjusting plate 14.

  Further, the second air direction adjusting plate 15 connects the exhaust air blowing means 10 and the second heat exchanger 24, and the indoor air passes through the second exhaust passage 28 after being sucked from the indoor suction port 2, After exchanging heat with outdoor air passing through the two air supply passages 27, the air is discharged from the outdoor outlet 3 by the exhaust air blowing means 10.

  The indoor air ventilated by the circulating air blowing means 11 is sucked into the main body box 5 from the indoor suction port 2 according to the circulating air flow path 31 and passes through the first exhaust flow path 26 to cause condensation in the first exhaust flow path 26. Freezing is thawed and dried, guided to the circulating air blowing means 11 by the second air direction adjusting plate 15, and discharged from the circulating air discharge port 22 into the room.

  Further, as shown in FIG. 1, when the second air direction adjusting plate 15 takes the position f, the normal heat exchange air operation is performed, and the outdoor air follows the air supply path 29 from the outdoor suction port 1 to the main body box. 5, is led to the first air supply passage 25 and the second air supply passage 27 by the first air direction adjusting plate 14, and is supplied into the room from the indoor air supply port 4 by the air supply air blowing means 9.

  The indoor air is sucked into the main body box 5 from the indoor suction port 2 according to the exhaust flow path 30, passes through the first exhaust flow path 26 and the second exhaust flow path 28, and then is exhausted by the second wind direction adjusting plate 15. It is guided to the means 10, sent to the outdoor discharge port 3 by the exhaust air blowing means 10, and discharged outside the room.

  At this time, outdoor air passed through the first air supply passage 25 and the second air supply passage 27 by the air supply and blowing means 9 and the first exhaust passage 26 and the second exhaust passage 28 through the exhaust air blowing means 10. The indoor air that is used performs heat exchange.

  By providing the second wind direction adjusting plate 15 with such a configuration, the first heat exchanger 23, the second heat exchanger 24, and the exhaust air blowing means can be obtained by a simple configuration in which two dampers and two motors are combined. 10 and the circulation blower 11 can be switched, whereby the normal heat exchange air operation and the defrost operation can be easily switched.

  In addition, the second air direction adjusting plate 15 performs the heat exchange air operation in the first heat exchanger 23 and the second heat exchanger 24 by cutting off the connection between the circulating air blowing means 11 and all the heat exchangers. When it is, it can suppress that indoor air leaks from the air path formed by the circulation ventilation means 11 to the air path formed by the exhaust ventilation means 10.

  In addition, with respect to the rice-shaped partition, the partition in the center when viewed in the horizontal direction is used as the rotation shaft of the motor, and the plate-shaped partition that can block either one of the left and right openings with respect to the rotation shaft A configuration is also possible in which one damper is arranged vertically on the upper side, and one plate-like damper that can block either one of the left or right openings or both openings is arranged on the lower vertical side.

  A configuration in which the four openings of the second wind direction adjusting plate 15 are individually closed using a damper or the like is also possible.

(Embodiment 11)
In contrast to the first embodiment shown in FIG. 1, the circulating prime mover 13 is driven when the circulating air blowing means 11 is connected to the first heat exchanger 23 or the second heat exchanger 24, and the exhaust air blowing means 10 is the first. When connecting with the heat exchanger 23 and the 2nd heat exchanger 24, it is set as the structure which stops.

  Specifically, for example, the circulation prime mover 13 is driven when the second wind direction adjusting plate 15 takes the position d or the position e in the tenth embodiment, and the circulation prime mover 13 is stopped when the position f is taken.

  When the circulating air blowing means 11 is connected to the first heat exchanger 23 or the second heat exchanger 24, the first defrosting operation or the second defrosting operation is performed. However, when the exhaust air blowing means 10 is connected to all the heat exchangers, a normal heat exchange air operation is performed, and the circulation air blowing means 11 loses the necessity to operate.

  The circulation prime mover 13 that drives the circulation blower means 11 is independent of the supply air exhaust prime mover 12 that drives the supply air blower means 9 and the exhaust blower means 10, and the circulation prime mover 13 is changed according to the necessity of the circulation blower means 11. By operating or stopping, the power consumption of the entire apparatus can be reduced.

(Embodiment 12)
In contrast to the first embodiment shown in FIG. 1, immediately after the second air direction adjusting plate 15 connects the circulating air blowing means 11 to the first heat exchanger 23 or the second heat exchanger 24, the rotational speed of the circulating prime mover 13 is set. A predetermined time, for example, 10 seconds required for damper switching, is increased to a predetermined number of revolutions, for example, 11/10 of the number of revolutions during normal heat exchange operation.

  More specifically, for example, with respect to the tenth embodiment, when the second wind direction adjusting plate 15 is switched from the position d to the position e, or from the position e to the position d, or from the position f. When the position is switched to the position d or the position e, the rotational speed of the circulating prime mover 13 is increased to a predetermined rotational speed for a predetermined time to increase the air volume of the air driven by the circulating air blowing means 11.

  The temperature of the air circulated into the room due to the switching of the second wind direction adjusting plate 15 in a state where the engine is operated without increasing the rotational speed of the circulating prime mover 13 in a standard outdoor temperature environment in winter in a cold region. The time during which the decrease is seen is measured in advance, and the time and the number of rotations for increasing the number of rotations of the circulating prime mover 13 so that the time during which the temperature of the circulating air is greatly decreased can be minimized are tested and calculated in advance. Can be set.

  The air passing through the heat exchanger surface per unit time with respect to the heat transferred from the heat exchanger surface to the air per unit time is increased by increasing the rotational speed of the circulation prime mover 13 to increase the air volume of the circulating air flow path 31. By increasing the amount of air, the temperature drop of the entire air can be reduced.

  Therefore, with this configuration, immediately after the switching of the second air direction adjusting plate 15, the air circulated indoors to the first heat exchanger 23 or the second heat exchanger 24 that has been cooled by the cold outdoor air during the heat exchange operation. It is possible to reduce the temperature drop of the air circulated into the room when it flows.

  Note that the same effect can be obtained by increasing the rotational speed of the circulating prime mover 13 immediately before and during the switching of the second wind direction adjusting plate 15. In this case, however, more power is required for switching, for example, more torque is required for the motor that drives the damper plate.

  Further, when the first wind direction adjusting plate 14 and the second wind direction adjusting plate 15 are switched at the same time, the wind flows through the two heat exchangers at the same time, so that the amount of air passing through the heat exchanger is temporarily reduced. At this time, since the degree of decrease in the amount of air flowing through the exhaust passage is smaller than the degree of decrease in the amount of air flowing through the air supply passage, air flow may be lost and air may leak from the cooled air supply passage to the exhaust passage. Therefore, there is a problem that condensation tends to occur in the exhaust passage.

  Therefore, in this case, the same effect as that of the above-described Embodiment 12 can be obtained by adopting a configuration in which the rotational speed of the supply / exhaust prime mover 12 is increased in accordance with the circulation prime mover 13 to balance the air volume.

(Embodiment 13)
As shown in FIG. 5, the first heat exchanger 23 and the second heat exchanger 24 are arranged between the outlet of the exhaust passage of the first heat exchanger 23 and the second heat exchanger 24 and the outdoor outlet 3. A first dew condensation detection unit 32 and a second dew condensation detection unit 33 that can detect the state of dew condensation or freezing are provided.

  When dew condensation or freezing is detected by the detection value of the first dew condensation detection means 32 or the second dew condensation detection means 33, the rotation speed of the supply / exhaust prime mover 12 is equivalent to, for example, 90% of normal heat exchange air operation The rotational speed of the circulating prime mover 13 is increased to, for example, a rotational speed equivalent to 110% during normal heat exchange air operation.

  As the first dew condensation detection unit 32 and the second dew condensation detection unit 33, a temperature detection unit, a humidity detection unit, a pressure detection unit, and a water droplet detection unit using a resistance value between electrodes are used alone or in combination. Hereinafter, in the present specification, regarding the detection means used as the first dew condensation detection means 32 and the second dew condensation detection means 33, (dew condensation) is added after the detection means name.

  More specifically, for example, a temperature detection unit is used as the first dew condensation detection unit 32 and the second dew condensation detection unit 33, and the first dew detection unit 32 and the second dew detection unit 33 are arranged in the exhaust flow path 30 between the first heat exchanger 23 and the second wind direction adjusting plate 15. 1 temperature detection means (condensation) is installed, and the second temperature detection means (condensation) is installed in the exhaust flow path 30 between the second heat exchanger 24 and the second wind direction adjusting plate 15.

  In cold regions where the outdoor temperature is extremely low, for example, −0 ° C. to −25 ° C., if the normal heat exchange air operation is continued, the indoor air that is warm and rich in humidity is converted into the outdoor air and the heat at a very low temperature. By exchanging, the condensation gradually freezes in one or both of the first exhaust passage 26 and the second exhaust passage 28 and freezes.

  By condensation and freezing in one or both of the first exhaust flow path 26 and the second exhaust flow path 28, the influence of dew condensation and freezing, for example, a decrease in the air flow, appeared in the normal heat exchange air operation. At the time, the first defrost operation and the second defrost operation are alternately switched, and the switching is continued until the first exhaust passage 26 and the second exhaust passage 28 are not affected by condensation or freezing.

  Here, when condensation or freezing occurs in the first exhaust passage 26 or the second exhaust passage 28, the set temperature of the air in the circulation air flow path 31 when the condensation or freezing drying is completed by the defrost operation, For example, 15 ° C. to 25 ° C. is obtained in advance through experiments, calculations, and the like.

  Despite the continued defrost operation, the first temperature detection means (condensation) or the second temperature detection means (condensation) causes at least one of the first exhaust flow path 26 and the second exhaust flow path 28 to be detected. When the temperature lower than the set temperature of the air in the circulating air flow path 31 when the drying due to the influence of condensation or freezing is completed, for example, about 5 ° C. lower than the set temperature is continuously detected for a predetermined time, the supply / exhaust prime mover 12 It is set as the structure which decreases the rotation speed of this and raises the rotation speed of the circulation motor | power_engine 13. The predetermined time will be described later together with detection means for switching between normal heat exchange air operation and defrost operation.

  Alternatively, as the first dew condensation detection means 32 and the second dew condensation detection means 33, temperature detection means and humidity detection means are used, and the first flow path 30 between the first heat exchanger 23 and the second wind direction adjustment plate 15 is firstly connected. Temperature / humidity detection means (condensation) is installed, and second temperature / humidity detection means (condensation) is installed in the exhaust flow path 30 between the second heat exchanger 24 and the second wind direction adjusting plate 15.

  The temperature and humidity of the air in the circulation air flow path 31 when the defrosting operation is completed due to condensation or freezing in the first exhaust passage 26 or the second exhaust passage 28, for example, 15 ° C. to 30 ° C. to 45 ° C. in advance. Set by experiment, calculation, etc.

  Although the defrost operation is continued, at least one of the first exhaust passage 26 and the second exhaust passage 28 is detected by the first temperature / humidity detection means (condensation) or the second temperature / humidity detection means (condensation). On the other hand, the temperature and humidity at which the absolute humidity is higher than the set temperature and humidity of the air in the circulating air flow path 31 when the condensation and freezing drying is completed, for example, an absolute humidity of about 110% of the absolute humidity under the set temperature and humidity conditions If the temperature / humidity range is 15 ° C. and 30%, it is preset between 1 ° C. 94% and 10 ° C. 50%. If the temperature and humidity are continuously detected for a predetermined time, the rotation speed of the supply / exhaust prime mover 12 And the rotational speed of the circulating prime mover 13 is increased.

  The predetermined time will be described later together with means for switching between normal heat exchange air operation and defrost operation.

  Alternatively, the pressure detection means is used as the dew condensation detection means 16, the first pressure detection means (condensation) is installed in the exhaust flow path 30 between the first heat exchanger 23 and the second wind direction adjusting plate 15, and the second heat A second pressure detection means (condensation) is installed in the exhaust flow path 30 between the exchanger 24 and the second air direction adjusting plate 15.

  When dew condensation or freezing occurs in the first exhaust flow path 26 or the second exhaust flow path 28, the air blowing resistance in the heat exchanger increases. Therefore, the static pressure of the circulating air flow path 31 when dew condensation or freezing occurs. Alternatively, the total pressure, for example, 70 Pa is set in advance by experiment, calculation, etc. at static pressure.

  During the defrost operation, the first pressure detection means (condensation) or the second pressure detection means (condensation) causes the influence of condensation or freezing in at least one of the first exhaust flow path 26 and the second exhaust flow path 28. When the static pressure or the total pressure of the circulating air flow path 31 is continuously detected for a predetermined time, the rotational speed of the supply / exhaust prime mover 12 is decreased and the rotational speed of the circulation prime mover 13 is increased.

  The predetermined time will be described later together with means for switching between normal heat exchange air operation and defrost operation.

  Alternatively, as the dew condensation detection means 16, a water drop detection means using a resistance value between the electrodes is used, the first water drop detection means (condensation) is installed in the vicinity of the outlet of the first exhaust flow path 26, and the second exhaust flow path. The second water droplet detection means (condensation) is installed in the vicinity of the 28 outlets.

  The resistance value between the electrodes decreases when the water droplets touch the electrodes. For example, the resistance between the electrodes having a resistance of 10 MΩ at DC 100 V decreases to 5 kΩ due to conduction by moisture, so the first exhaust flow path 26 or the second exhaust flow It can be detected that condensation or freezing has occurred on the road 28.

  During the defrost operation, the first water droplet detection means (condensation) or the second water droplet detection means (condensation) causes the condensation or freezing to occur in at least one of the first exhaust passage 26 and the second exhaust passage 28 for a predetermined time. For example, if the detection continues for 5 minutes, the rotation speed of the supply / exhaust prime mover 12 is decreased and the rotation speed of the circulation prime mover 13 is increased.

  The predetermined time will be described later together with means for switching between normal heat exchange air operation and defrost operation.

  One of the first dew condensation detection means 32 and the second dew condensation detection means 33 is a means for detecting the influence of dew condensation on the normal heat exchange air operation for switching between the normal heat exchange air operation and the defrost operation. Or both.

  Here, by using one of the first dew condensation detection means 32 and the second dew condensation detection means 33, the dew condensation detection means that is not used before the start of the defrost operation can be stopped, and the power consumption is reduced. be able to.

  Further, by using both the first dew condensation detection means 32 and the second dew condensation detection means 33, dew condensation may occur in the heat exchanger depending on the case where the wind flows unevenly into the first heat exchanger and the second heat exchanger. Condensation can be accurately detected even if it occurs unevenly between the two.

  In this case, the first condensation detection means 32 or the second condensation detection means 33 is set so that the condensation can be detected from the environment of the exhaust flow path 30 in the same manner as the method of detecting the condensation from the environment of the circulating air flow path 31.

  When dew condensation or freezing is detected, the normal heat exchange air operation is switched to the defrost operation, and a predetermined time obtained as a time in which all condensation or freezing in the exhaust passage can be dried in advance by experiment or calculation For example, the first defrost operation and the second defrost operation are switched every 10 minutes.

  When the first dew condensation detection means 32 or the second dew condensation detection means 33 continues to detect dew condensation or freezing during the first defrost operation or the second defrost operation, the rotation speed of the supply / exhaust prime mover 12 decreases. The rotational speed of the circulating prime mover 13 is increased.

  When the defrosting operation cannot complete the condensation or freezing drying of the first exhaust passage 26 or the second exhaust passage 28, the rotational speed of the supply / exhaust prime mover 12 is lowered, and the supply / air blowing means 9 And the air volume which the exhaust ventilation means 10 drives is reduced.

  As a result, the amount of water passing through the exhaust passage per unit time is also reduced, and the amount of condensation or freezing newly generated in the exhaust passage during the heat exchange air operation during freezing can be reduced.

  Further, by increasing the number of rotations of the circulating prime mover 13 and increasing the amount of air driven by the circulating air blowing means 11, the amount of water that can be evaporated into the air per unit time also increases, and drying is performed during the defrost operation. The amount of condensation or freezing that can be increased can be increased, and the exhaust flow path can be completely dried earlier.

  Alternatively, the first dew condensation detection means 32 or the second dew condensation detection means 33 circulates as means for detecting the influence of dew condensation on the normal heat exchange air operation for switching between the normal heat exchange air operation and the defrost operation. Similar to the method of detecting dew condensation from the environment of the air flow path 31, the setting is made so that dew condensation can be detected from the environment of the exhaust flow path 30.

  When the first condensation detection means 32 or the second condensation detection means 33 detects condensation or freezing, if the first condensation detection means 32 detects that the heat exchange air operation is normal, it switches to the first defrost operation. Instead, when it is detected by the second dew condensation detection means 33, the operation is switched to the second defrost operation.

  The first defrosting operation or the second defrosting operation ends when the first dew condensation detection unit 32 or the second dew condensation detection unit 33 that first detects dew condensation no longer detects dew condensation.

  After that, when the first defrost operation is being performed, the detection value of the second dew condensation detection means 33, and when the second defrost operation is being performed, the detection value of the first dew condensation detection means 32 is detecting condensation. The second defrost operation or the first defrost operation is started, and the normal heat exchange air operation is performed when the first dew condensation detection means 32 and the second dew condensation detection means 33 no longer detect dew condensation. .

  When heat exchange air operation during freezing is continued after condensation has been detected in advance, there may be significant obstacles to the operation due to accumulated condensation, such as when the exhaust passage is blocked by condensation and sufficient ventilation airflow cannot be obtained. The time until occurrence, for example, 1 hour is calculated by experiment or calculation, and the defrost operation duration is set based on that time, for example, the defrost operation is performed for 1/12 of the time.

  When the defrost operation is started and dew condensation is detected even after the defrost operation duration time has elapsed, the rotation speed of the supply / exhaust prime mover 12 decreases and the rotation speed of the circulation prime mover 13 increases.

  In addition, as a detection means for switching between normal heat exchange air operation and defrost operation, an outside air temperature detection means 38 may be provided in the vicinity of the outdoor inlet 1 as shown in FIG.

  When the outside air temperature falls below a predetermined temperature in advance, specifically when it falls below, for example, −10 ° C., it is determined that condensation or freezing has occurred in the heat exchanger, and the defrost operation is started. When the temperature exceeds the predetermined temperature, the defrost operation is terminated, and the normal heat exchange air operation and the defrost operation can be switched.

  In this case, if the heat exchange air operation during freezing is continued after condensation has been detected in advance, the accumulated condensation will cause a significant obstacle to the operation, for example, the exhaust passage will be blocked by condensation, and sufficient ventilation air volume will not be obtained. A time until a case occurs, for example, 1 hour is calculated by experiment or calculation, and the defrost operation duration time is set based on the time, for example, the defrost operation is performed for 1/12 of the time. .

  When the defrost operation is started and dew condensation is detected even after the defrost operation duration time has elapsed, the rotation speed of the supply / exhaust prime mover 12 decreases and the rotation speed of the circulation prime mover 13 increases.

  In the case where a temperature detection unit, a humidity detection unit, and a pressure detection unit are used as the first dew condensation detection unit 32 and the second dew condensation detection unit 33, the same type of dew condensation detection unit is provided on the upstream side of the heat exchanger. Condensation detection means on the upstream side and downstream side of the heat exchanger 23 and the second heat exchanger 24 may be combined into a first condensation detection means 32 and a second condensation detection means 33, respectively.

  In this case, the detection value of the dew condensation detection means can be controlled not only by the absolute value but also by the difference between the detection values of the dew condensation detection means upstream and downstream of the heat exchanger.

(Embodiment 14)
As shown in FIG. 6, a temperature detection means 17 for detecting the temperature of the air is provided in the vicinity of the indoor air supply port 4, and when the temperature of the air supplied from the indoor air supply port 4 falls below a predetermined temperature, The rotational speed of the air exhaust motor 12 is reduced to a predetermined value, for example, to a rotational speed equivalent to 90% during normal heat exchange air operation, and the rotational speed of the circulation motor 13 is reduced to a predetermined value, for example, normal heat. It is set as the structure which raises to the rotation speed equivalent to 110% at the time of exchange air driving | operation.

  More specifically, for example, a temperature at which the temperature of the air supplied from the indoor air supply port 4 is too low and feels uncomfortable, for example, 0 ° C. where freezing occurs is set as the predetermined temperature.

  When the temperature detection means 17 detects that the temperature of the air supplied from the indoor air supply port 4 is equal to or lower than the predetermined temperature, the supply air / exhaust prime mover 12 is in a certain ratio, for example, 1% of each. The temperature detecting means increases the rotational speed of the circulation prime mover 13 and increases the rotational speed of the circulating prime mover 13 until the temperature of the air supplied from the indoor air supply port 4 becomes equal to or higher than a predetermined temperature, for example, every minute. 17 is configured to repeatedly detect and control the rotational speed.

  With this configuration, the rotational speed of the air supply / exhaust prime mover 12 decreases, so that the air volume driven by the air supply / air blowing means 9 and the exhaust air blowing means 10 decreases. Therefore, the heat transfer plate area of the heat exchanger that is in contact with the unit volume of air per unit time increases, so the heat exchange efficiency of the heat exchanger alone increases, increasing the temperature of the supplied air Can be made.

  Further, the number of rotations of the circulation prime mover 13 is increased, the amount of air driven by the circulation blower unit 11 is increased, and the speed of drying the condensation and freezing of the exhaust passage is increased, so that the air flowing through the circulation air flow path 31 during the defrost operation Therefore, a part of the exhaust flow path 30 common to the circulating air flow path 31 including the heat exchanger can be further warmed. With these effects, the temperature of the air supplied to the room can be suppressed to such an extent that it does not become uncomfortable.

  In addition, through experiments or calculations in advance, the rotation speed of the supply / exhaust prime mover 12 and the circulation prime mover 13 and the air supplied from the indoor intake port 4 in a standard outdoor temperature environment in a cold region in winter, for example, −25 ° C. Further, a temperature at which the temperature of the air supplied from the indoor air supply port 4 is too low and feels uncomfortable, for example, 0 ° C. where freezing occurs is set as a predetermined temperature.

  When the temperature detection means 17 detects that the temperature of the air supplied from the indoor air supply port 4 has become equal to or lower than a predetermined temperature, the supply air / exhaust prime mover set from the relationship between the rotational speed and the air temperature. 12 or a predetermined number of rotations of the circulation prime mover 13, the rotation number of the supply / exhaust prime mover 12 is decreased, for example, reduced to about 90% of the normal number of rotations, and the rotation number of the circulation prime mover 13 is increased, for example, The same effect can be obtained with a configuration in which it is increased to about 110%.

(Embodiment 15)
As shown in FIG. 7, for example, a damper 18 is provided as a wind path shielding means for preventing outdoor air from flowing into the air supply flow path 6.

  Specifically, for example, when the damper 18 is installed in the outdoor suction port 1 and air flows through the air supply path 29, the damper 18 is opened by the wind pressure of the air, and no air flows through the air supply path 29. In this case, the damper 18 blocks the air supply path 29 by the action of a spring or gravity.

  With this configuration, when the heat exchange type ventilator is stopped, outdoor air enters from the outdoor suction port 1 and cools the first air direction adjusting plate 14 and the heat exchanger, whereby the first due to the frozen water droplets. It is possible to suppress the malfunction of the airflow direction adjusting plate 14, the clogging of the air supply passage and the exhaust passage of the heat exchanger, and the malfunction of the power generating portion of the first airflow direction adjusting plate 14 due to cooling.

  In addition, although the 1st wind direction adjustment board 14 is equipped with the mechanism which interrupts | blocks the connection with the outdoor suction inlet 1 and all the heat exchangers, although the malfunction of the 1st wind direction adjustment board 14 cannot be suppressed, a heat exchanger Occurrence of clogging of the air supply flow path and the exhaust flow path can be suppressed, and the effect as partial air path shielding means can be exhibited.

  In this case, the heat insulation of the operating portion of the first wind direction adjusting plate 14 is increased, and for example, a motor is used as the power generating portion of the first wind direction adjusting plate 14, and the grease used for the motor is kept lubricated to −35 ° C. It becomes a more suitable structure by changing to a thing and introducing the heater which preheats the axis | shaft of an action | operation part.

(Embodiment 16)
As shown in FIG. 8, when the circulating prime mover 13 is operated, the outdoor air sent into the room by the supply air blowing means 9 and the indoor air sent into the room by the circulation blowing means 11 are mixed and supplied. To do.

  Specifically, for example, the circulating air flow path 31 on the downstream side of the circulating air blowing means 11 is joined to the air flow path 29 on the downstream side of the air supply blowing means 9 and on the upstream side of the indoor air supply port 4 to Then, the air is supplied into the room through the indoor air supply port 4 after mixing.

  The temperature of the air circulating through the circulation air flow path 31 and circulating into the room is higher than the air supplied through the supply air path 29 into the room, and the supplied air and the circulating air are mixed. Thus, the temperature of the air supplied into the room can be raised, and the temperature drop in the space near the indoor air inlet 4 can be suppressed.

  In particular, when the configuration of the fourteenth embodiment is adopted, the air volume of the air supplied to the room through the air supply path 29 is reduced, and the air volume of the air that is circulated into the room through the circulating air path 31 is increased. For this reason, the temperature of the air supplied to the room rises more suitably.

  The same effect can be obtained even in a configuration in which the circulating air discharge port 22 is installed in the vicinity of the indoor air supply port 4 and the discharged air is immediately mixed in the room.

(Embodiment 17)
The heat exchanger is configured such that the inlet 19 of the exhaust passage opens vertically downward, and the outlet 20 of the exhaust passage is positioned vertically upward compared to the inlet 19 of the exhaust passage. A dish-like structure 21 having a concave shape in the vertically upward direction is arranged in the vertically downward direction of the inflow port 19.

  Specifically, for example, a box-shaped heat exchanger 8 having a configuration in which L-shaped air supply flow paths 6 and L-shaped exhaust flow paths 7 are alternately overlapped is used. FIG. 9 shows a cross-sectional view in which the direction is vertically downward.

  With this configuration, when the dew condensation generated by the heat exchange air operation at the normal time or the heat exchange air operation at the time of freezing or the water droplets generated by freezing during the defrost operation flows out, the outlet 20 of the exhaust passage. Is provided vertically above the inlet 19 of the exhaust passage, so that water droplets can flow out to the inlet 19 of the exhaust passage by gravity.

  Furthermore, by directing the inlet 19 of the exhaust flow path vertically downward, water droplets flowing from inside the heat exchanger flow out of the heat exchanger without collecting at the inlet 19 of the exhaust flow path. Here, by providing a dish-like structure 21 in which the vertically upward direction is concave in the vertically downward direction of the inlet 19 of the exhaust flow path, water droplets flowing out from the heat exchanger are separated into the concave parts of the dish-like structure 21. Can be stored.

  This dish-like structure 21 is located in a portion of the air supply path 29 where warm air in the room before heat exchange with outdoor air moves, and water droplets can be dried by warm air in the room.

  In the thirteenth embodiment, when the water droplet detection means using the resistance value between the electrodes is used as the first dew condensation detection means 32 and the second dew condensation detection means 33, in addition to the installation locations exemplified in the thirteenth embodiment. In addition, a configuration in which the air inlet 19 of the exhaust passage or the concave portion of the dish-like structure 21 is installed is also exemplified.

  With this configuration, dew condensation can be detected from water droplets that have flowed and collected from within the heat exchanger. In addition, when installing in the concave portion of the dish-like structure 21, it is detected that a predetermined amount of water droplets has accumulated in the concave portion by changing the vertical installation height with respect to the bottom of the concave portion. By reducing the rotational speed of the air exhaust prime mover 12 and increasing the rotational speed of the circulation prime mover 13, condensation can be dried more reliably.

  The heat exchange type ventilator according to the present invention can continuously perform the original heat exchange ventilation even when the outdoor temperature is extremely low, and is useful as a ventilator for heat exchange ventilation in cold regions in winter. .

DESCRIPTION OF SYMBOLS 1 Outdoor suction port 2 Indoor suction port 3 Outdoor discharge port 4 Indoor air supply port 5 Main body box 6 Air supply flow path 7 Exhaust flow path 8 Heat exchanger 9 Air supply air blow means 10 Exhaust air blow means 11 Circulation air blow means 11 Supply air exhaust prime mover DESCRIPTION OF SYMBOLS 13 Circulation motor 14 1st wind direction adjustment board 15 2nd wind direction adjustment board 16 Condensation detection means 17 Temperature detection means 18 Damper 19 Exhaust flow path inlet 20 Exhaust flow path outlet 21 Dish-shaped structure 22 Circulating air discharge port 23 1st heat exchanger 24 2nd heat exchanger 25 1st air supply flow path 26 1st exhaust flow path 27 2nd air supply flow path 28 2nd exhaust flow path 29 Supply air flow path 30 Exhaust flow path 31 Circulating air flow path 32 1st DESCRIPTION OF SYMBOLS 1 Condensation detection means 33 2nd condensation detection means 34 1st heat exchanger-opening which connects exhaust air blowing means 35 1st heat exchanger-opening which connects circulation air blowing means 36 2nd heat exchanger-exhaust air blowing means Continued opening 37 second heat exchanger - opening connecting the circulating blower means 38 outside air temperature detecting means

Claims (19)

An outdoor suction port for sucking outdoor air from the outside, an indoor suction port for sucking indoor air from the room, an outdoor discharge port for exhausting indoor air to the outside, and an indoor air supply port for supplying outdoor air to the room The main body box is provided with a plurality of heat exchangers for exchanging heat between the outdoor air flowing through the air supply passage for passing outdoor air and the indoor air flowing through the exhaust flow passage for passing indoor air, and sucks the outdoor air, Air supply and blowing means for supplying air into the room through the air supply flow path, exhaust air blowing means for sucking in indoor air and exhausting the air through the exhaust flow path, and indoor air are sucked into the room through the exhaust flow path. A circulation blower that circulates air to the supply air blower and the exhaust blower and connects any one of the heat exchangers, connects the circulation blower and another heat exchanger, and supplies the air Blower and front An exhaust air blowing means, a selection means for selecting the heat exchanger to be connected to the circulation air blowing means, and a supply air exhaust motor for driving the air supply air blowing means and the exhaust air blowing means, and the circulation air blowing means And a first wind direction adjusting plate that is a selection means for selecting a heat exchanger to be connected to the supply air blowing means, and the first wind direction adjustment plate is connected to the supply air blowing means. to switch between and select the heat exchanger, the air supply blowing means can be connected to all of the heat exchanger, the circulation motor is stopped when the air supply blowing means is connected to all of the heat exchanger heat exchange type ventilator you wherein a. The air supply / air blowing means is arranged so as to suck air from the air supply flow path and supply air into the room, and the exhaust air blowing means is arranged so as to suck air from the exhaust flow path and exhaust it outside the room. The heat exchange ventilator according to claim 1. The heat exchange type ventilator according to claim 2, wherein the supply / exhaust prime mover is installed in an air passage formed by supply / air blowing means. The heat exchange ventilator according to claim 1, wherein the circulating air blowing means is arranged so as to suck air from the exhaust passage and exhaust the air into the room. The heat exchanging ventilator according to claim 4, wherein the circulation prime mover is installed in an air passage formed by a circulation air blowing means. The supply air blowing means, the exhaust ventilation means, and the circulation ventilation means are each provided with an impeller, and the impeller of the circulation ventilation means is configured to have a smaller volume than the impeller of the supply air blowing means and the exhaust ventilation means. 2. The heat exchange type ventilator according to 1. The heat exchange ventilator according to any one of claims 1 to 6 , wherein the first wind direction adjusting plate is provided between the outdoor suction port and the heat exchanger. The heat according to any one of claims 1 to 7 , wherein the first air direction adjusting plate is configured to reduce the rotation speed of the supply / exhaust prime mover when the connection between the supply / air supply means and the heat exchanger is switched. Exchangeable ventilator. The heat exchange type ventilator according to claim 1 , further comprising a second wind direction adjusting plate which is a selection means for selecting a heat exchanger connected to the exhaust air blowing means and the circulation air blowing means. The heat exchange type ventilator according to any one of claims 1 to 9 , wherein the second wind direction adjusting plate can block connection between the circulating air blowing means and all the heat exchangers. The circulation motor is driven by the second wind direction adjusting plate when the circulating air blowing means is connected to the heat exchanger, and is stopped by the second wind direction adjusting plate when the circulating air blowing means is not connected to the heat exchanger. The heat exchange type ventilator according to claim 10 . In accordance with the switching of the first air direction adjusting plate, the second air direction adjusting plate is connected to the heat exchanger to which the exhaust air blowing means is connected, and the circulation air blowing means is connected to the first and exhaust air blowing means. heat exchange type ventilator according to any one of claims 1 to 11, wherein the switch to be connected to the heat exchanger is not connected. Immediately after the second wind direction adjusting plate connects the circulating air blowing means and the heat exchanger, or immediately after switching the heat exchanger connected to the circulating air blowing means, the rotational speed of the circulating prime mover is increased. The heat exchange type ventilator according to claim 10 . Condensation detection means that can detect condensation and freezing conditions are provided between the outlet of the exhaust passage and the outdoor outlet, and the rotation speed of the circulation prime mover is reduced by reducing the rotational speed of the supply / exhaust prime mover according to the detection value of the condensation detection means. heat exchange type ventilator according to any one of claims 1 to 13, characterized in that to increase the number. A temperature detection means for detecting the temperature of the air at the indoor air supply port, and when the temperature of the air supplied from the indoor air supply port falls below a predetermined temperature, the rotational speed of the supply air / exhaust motor is reduced, The heat exchange type ventilator according to any one of claims 1 to 14 , wherein the number of rotations is increased. The heat exchange type ventilator according to any one of claims 1 to 15, further comprising an air passage shielding means for preventing outdoor air from flowing into the air supply passage. 16. The structure according to claim 1 or 15 , wherein during operation of the circulation prime mover, the outdoor air sent into the room by the supply air blowing means and the indoor air sent into the room by the circulation blowing means are mixed and discharged. Heat exchange ventilator. The heat exchanger, the orientation inlet of the exhaust passage to the vertically downward direction, claim outlet of the exhaust flow path, characterized in that a structure located vertically upward than in the inlet 1-17 The heat exchange ventilator according to any one of the above. The heat exchange type ventilator according to claim 18 , wherein a dish-like structure is arranged vertically downward of the inlet of the exhaust passage.

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