JP2018194274A - Heat exchange ventilator - Google Patents

Abstract

A heat exchange ventilator that does not impair ventilation efficiency even during defrost operation. The air flow of the first ventilation path 1a and the second ventilation path 1b in the heat exchanger 1 during normal operation is changed during defrost operation without changing the blowing direction of the air supply / exhaust fan. Opening / closing sections 3 and 4 for partitioning the heat exchanger 1 from the outdoor space and the indoor space and adjusting the flow path are provided so as to be reversed. The outdoor opening / closing unit 3 connects the outside air inlet 21 and one end of the first ventilation path 1a (or the second ventilation path 1b), and also connects the exhaust port 22 and the second ventilation path 1b (or the first ventilation path 1b). One end of the ventilation path 1a) is connected, and the indoor opening / closing part 4 connects the other end of the air supply port 23 and the first ventilation path 1a (or the second ventilation path 1b) according to the flow of the airflow. In addition to being connected, the exhaust inlet 24 and the other end of the second ventilation path 1b (or the first ventilation path 1a) are connected. [Selection] Figure 3

Description

  The present invention relates to a heat exchange ventilator that performs heat exchange between supply air and exhaust.

  The conventional heat exchange type ventilator is provided with a ventilation box for the outdoor suction port, outdoor exhaust port, indoor suction port, and indoor air supply port in the main body box, and the outside air is sucked in from the outdoor suction port. Ventilation is performed by replacing indoor air with outdoor air by supplying air from the mouth to the room, sucking indoor exhaust air from the indoor air inlet, and discharging it from the outdoor air outlet.

  A heat exchanger and heat exchanger that circulates the air are installed inside the main body box of the heat exchange type ventilator. Inside the heat exchanger, the heat of the exhaust drawn from the room is transferred to the supply air drawn from the outside. The heat exchange is recovered.

  Then, the air supply passage through which the supply air is inserted and the exhaust passage through which the exhaust is inserted are each divided into a plurality of parts, and the heat exchange operation of the heat exchanger is performed by connecting the divided flow path to one of the ventilation openings. In addition, a technique for performing a defrost operation for removing condensation and icing in a heat exchanger is disclosed (for example, see Patent Document 1).

JP 2011-17470 A

  The conventional heat exchange type ventilator is provided with a mechanism that divides the partition and the flow path at the inlet of the flow path.When the temperature at which condensation or icing occurs, the normal heat exchange operation and the defrost operation are alternately performed. It was a repeating configuration. During the defrost operation, the heat exchange operation is performed in a part of the heat exchanger and the defrost operation is performed in the other part. Therefore, the heat exchange ventilation operation is not performed in a part of the heat exchanger, and the ventilation efficiency There was a problem that decreased.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a heat exchange ventilator that can perform a defrost operation without reducing ventilation efficiency.

  In the heat exchange ventilator according to the present invention, the first and second ventilation paths that connect the outdoor space and the indoor space are combined, one of which is an air supply path and the other is an exhaust path. A first operating state comprising a heat exchanger for exchanging heat with the second ventilation path, wherein the first ventilation path is the air supply path, and the second ventilation path is the exhaust path And a switching operation to a second operation state in which the second ventilation path is the air supply path and the first ventilation path is the exhaust path.

  According to the heat exchange ventilator of this invention, since the roles of the air supply path and the exhaust path of the first and second ventilation paths are reversed by switching between the first and second operating states, the two ventilation paths It becomes possible to perform defrost operation that removes condensation or icing that occurs in one ventilation path due to the difference in temperature and humidity, or suppresses the formation of condensation or icing without reducing ventilation efficiency.

It is a top view of the heat exchange ventilation apparatus of Embodiment 1 of the present invention. It is a perspective view of the heat exchanger of the heat exchange ventilation apparatus of FIG. It is a sectional side view in the AA line of FIG. 1, and a BB line, and is a figure which shows the control state of an opening-and-closing part in case a heat exchange ventilator is in a 1st operation state. It is a sectional side view in the AA line of FIG. 1, and a BB line, and is a figure which shows the control state of the opening-and-closing part in case a heat exchange ventilator is in a 2nd operation state. It is a top view which shows the internal structure of the heat exchange ventilation apparatus of FIG. It is a perspective view of the opening-and-closing part of the heat exchange ventilation apparatus of FIG. It is a principal part sectional side view in the CC line and DD line of FIG. 1, and is a figure which shows the control state of the opening-and-closing part in case a heat exchange ventilator is in a 1st, 2nd operation state. It is a figure which shows the flowchart which shows the operation | movement of Embodiment 1 of this invention. It is a top view of the heat exchange ventilation apparatus of Embodiment 2 of this invention. It is a principal part sectional side view in the EE line of FIG. 9, and the FF line, and is a figure which shows the control state of the opening-and-closing part in case a heat exchange ventilator is in a 1st, 2nd operation state.

Embodiment 1 FIG.
The heat exchange ventilation apparatus 100 of Embodiment 1 of this invention is demonstrated.
FIG. 1 is a top view showing a schematic configuration of the heat exchange ventilator 100. The heat exchanger 1 that performs heat exchange between the two ventilation paths through which the air supply 10a (outside air, outdoor air) and the exhaust 10b (room air) are inserted is housed in the housing portion 2 inside the housing 20. Is arranged in. The housing 20 of the heat exchange ventilator 100 is used by being fixed to a vehicle, a house, or the like so as to connect the outdoor space and the indoor space. The heat exchange ventilator 100 is provided with an outside air inlet 21 (outdoor inlet) for sucking the supply air 10a and an outlet 22 (outdoor outlet) for discharging the indoor exhaust 10b to the outside on the outdoor side. In addition, an air supply port 23 (indoor air supply port) for supplying the air supply 10a to the room and an exhaust air intake port 24 (indoor intake port) for sucking the indoor exhaust gas 10b are provided.

An opening / closing part 3 (outdoor channel opening / closing part) for switching the direction of the airflow to be inserted into the heat exchanger 1, respectively, on the outdoor side and the indoor side wall part of the storage part 2 for storing the heat exchanger 1, An opening / closing part 4 (indoor side channel opening / closing part) is provided. The opening / closing parts 3 and 4 partition the heat exchanger 1 from the external space and the internal space.
A blower 9 that generates an airflow for supplying and exhausting air is provided inside the housing 20. The blowing direction of the blower 9 is constant, and the flow of airflow at the outside air inlet 21, the exhaust port 22, the air supply port 23, and the exhaust suction port 24 is constant.
In order to separate the supply air 10a and the exhaust 10b, partition portions 2a and 2b are provided in the storage portion 2, and the partition portions 20a and 20b are provided in the range from the vicinity of the ventilation opening of the housing 20 to the storage portion 2. Is provided.

  FIG. 2 is a perspective view showing a schematic configuration of the heat exchanger 1. As illustrated in FIG. 2, the heat exchanger 1 has a corrugated shape in which flat plate-like partition plates 41 are vertically arranged at predetermined intervals and a flow path is formed in a gap between adjacent partition plates 41 in one direction. In this configuration, the spacing plate 42 is arranged. And in this heat exchanger 1, the two flow paths in which the direction which consists of the 1st ventilation path 1a and the 2nd ventilation path 1b differs contact | connects through the partition plate 41, and heat exchange is possible. They are layered alternately. And the heat exchanger 1 is provided so that the direction of the flow path formed in the space | interval plate 42 may cross | intersect between the space plates 42 adjacent.

  In the heat exchanger 1 of FIG. 2, one end of the first ventilation path 1a is opened to the insertion portion 11, and the first ventilation path 1a extends diagonally downward to the left in FIG. The other end of 1 a is opened to the insertion part 13. Similarly, one end of the second ventilation path 1b of the heat exchanger 1 is opened to the insertion portion 12, and the second ventilation path 1b extends obliquely upward to the left in FIG. 2, and the second ventilation path 1b The other end is opened to the insertion part 14. In the example of FIG. 2, the first ventilation path 1a, which is a flow path from the upper right to the lower left of the figure, is an air supply path, the air supply 10a flows inside, and the second ventilation path 1b is an exhaust path. This shows that the exhaust 10b flows inside.

  The heat exchange ventilator 100 in which the heat exchanger 1 as shown in FIG. 2 is incorporated connects the outdoor space and the indoor space, and the first and second ventilation paths 1a have one air supply path and the other an exhaust path. 1b is combined, and heat exchange is performed between the first and second ventilation paths 1a and 1b. And the 1st ventilation path 1a is made into an air supply path by controlling the opening-and-closing state of the opening-and-closing parts 3 and 4 provided in the two wall surface parts which the storage part 2 which accommodates the heat exchanger 1 opposes, and the 1st Switching operation between a first operation state in which the second ventilation path 1b is an exhaust path and a second operation state in which the second ventilation path 1b is an air supply path and the first ventilation path 1a is an exhaust path The defrost can be performed by removing the condensation and icing formed in the flow path (ventilation path) of the heat exchanger 1 by reversing the air supply path and the exhaust path in a state where the air blowing direction by the blower 9 is constant. It is possible to drive. In this heat exchange ventilator 100, the ventilation efficiency is the same regardless of whether the first and second operating states are different. That is, the ventilation efficiency is not lowered even during the defrost operation, and the heat exchange efficiency can be maintained.

Next, switching of the operation state of the heat exchange ventilator 100 will be described in more detail with reference to FIGS.
FIG. 3 is a view showing the flow of the airflow when the heat exchanging ventilator 100 is in the first operation state, and FIG. 3A is a side sectional view taken along line AA of FIG. FIG. 3 is a side cross-sectional view passing through the suction port 21 and the air supply port 23. As shown in FIG. 3A, an air supply fan 8 a that is rotated by the fan motor 7 is provided in the housing 20. The supply air 10 a taken in from the outside air inlet 21 is taken into the storage part 2 from the opening / closing region 3 a of the opening / closing part 3, led to the insertion part 11 of the heat exchanger 1, and opened to the insertion part 11. It is introduced into the heat exchanger 1 from the end of the first ventilation path 1a. For example, when the room is warm and the outside is cold in winter, the cold air supply 10a introduced into the first ventilation path 1a is introduced into the second ventilation path 1b (not shown) inside the heat exchanger 1. Heat exchange (heat recovery) that is warmed by warm exhaust is performed. Then, the air supply 10 a adjusted in temperature by heat exchange is discharged from the insertion portion 13 in which the other end of the first ventilation path 1 a is opened, and is passed through the opening / closing region 4 a of the opening / closing portion 4 from the air supply opening 23 to the room. To be supplied.

  In the example of FIG. 3, the upper and lower apexes serving as the boundary portions between the insertion portions 11 and 14 and 12 and 13 of the heat exchanger 1 are in contact with the inner wall of the storage portion 2 to separate the outdoor and indoor spaces. However, it goes without saying that the introduction space for the air supply 10a and the exhaust gas 10b can be separated by providing partition walls extending from the top to the upper and lower wall surfaces of the storage unit 2.

  And exhaust_gas | exhaustion as shown in FIG.3 (b) is performed simultaneously with the above air supply. FIG. 3B is a side sectional view taken along line BB in FIG. 1, that is, a side sectional view passing through the exhaust suction port 24 and the exhaust port 22. As shown in FIG. 3B, an exhaust fan 8 b that is rotated by the fan motor 7 is provided in the housing 20. The indoor exhaust air 10 b taken in from the exhaust air inlet 24 is taken into the storage part 2 from the opening / closing region 4 d of the opening / closing part 4, led to the insertion part 14 of the heat exchanger 1, and opened to the insertion part 14. It is introduced into the heat exchanger 1 from the other end of the second ventilation path 1b. Inside the heat exchanger 1, heat exchange is performed in which the warm exhaust air 10b introduced into the second ventilation path 1b warms the cold outside air introduced into the first ventilation path 1a (not shown). The exhaust 10b is discharged from the insertion portion 12 where one end of the second ventilation path 1b is opened, and is discharged from the exhaust port 22 to the outside through the opening / closing region 3d of the opening / closing portion 3.

When the supply air 10a is at a higher temperature than the exhaust 10b, such as in summer, the high temperature supply air 10a taken from the outside is conversely converted to the low temperature exhaust 10b exhausted from the room. Then, heat exchange is performed in the heat exchanger 1 so as to cool.
In either case, the outside air is not directly introduced into the room, but the air is supplied after performing heat exchange so as to approach the temperature of the conditioned room. It becomes possible to ventilate while.

When the heat exchange ventilator 100 is used in winter, that is, under a situation where cold air flows into the air supply passage through which the air supply 10a is inserted and warm air flows into the exhaust passage through which the exhaust 10b is inserted, Due to the temperature and humidity in the room, condensation and icing are likely to occur in the exhaust passage.
Therefore, in order to remove condensation / freezing or to suppress the formation of condensation / freezing, the open / close states of the open / close regions 3a to 3d and 4a to 4d dividing the open / close portions 3 and 4 into the first and second Control is performed so that the air flow in the second ventilation paths 1a and 1b is reversed, and switching to the defrost operation is performed in which dry outside air is inserted into the ventilation path on the side where condensation or icing has occurred.

  FIG. 4 is a diagram showing the flow of airflow when the heat exchange ventilator 100 transitions from the first operating state shown in FIG. 3 to the second operating state, and FIG. FIG. 4B is a side sectional view taken along line A-A in FIG. In this second operating state, as shown in FIG. 4A, the supply air 10 a introduced into the storage unit 2 through the open / close region 3 c of the open / close unit 3 is inserted into the insertion units 12 to 14 of the heat exchanger 1. By passing through the second ventilation path 1b leading to (in the opposite direction to FIG. 3), heat exchange and ventilation are performed, and at the same time, condensation and icing in the flow path are removed, and the opening and closing part 4 is opened and closed. It is supplied indoors through the region 4c. As shown in FIG. 4B, the exhaust 10 b introduced into the heat exchanger 1 through the opening / closing region 4 b of the opening / closing part 4 is the first ventilation that extends from the insertion parts 13 to 11 of the heat exchanger 1. It passes through the path 1a in the opposite direction and is discharged to the outside through the opening / closing region 3b of the opening / closing part 3.

  Here, FIG. 5 is a top view showing an internal configuration of the heat exchange ventilator 100. A blower 9 including an air supply fan 8a and an exhaust fan 8b is disposed between the casing 20 and the opening / closing unit 3 provided on the wall surface on the outdoor side of the storage unit 2, and the air supply fan 8a is disposed. In order to separate the space connected to the outside air inlet 21 and the space connected to the exhaust port 22 where the exhaust fan 8b is disposed, a partition wall portion 20a is provided. Similarly, the space where the indoor side opening / closing part 4 is connected to the air supply port 23 and the exhaust suction port 24 is separated by the partition wall 20b.

  Moreover, in order to isolate | separate the insertion parts 11 and 12 (one end of the 1st ventilation path 1a, one end of the 2nd ventilation path 1b) connected with the outdoor space side inside the storage part 2 which accommodates the heat exchanger 1. In addition, a partition wall portion 2a extending from the boundary between the insertion portions 11 and 12 of the heat exchanger 1 to the partition wall portion (opening / closing portion 3) of the storage portion 2 is provided, and similarly, the insertion portions 13 and 14 connected to the indoor space. In order to separate (the other end of the first ventilation path 1a and the other end of the second ventilation path 1b), the opposing wall surface (from the boundary between the insertion parts 13 and 14 of the heat exchanger 1) ( A partition wall 2b extending to the opening / closing part 4) is provided, and the flow paths of the air supply 10a and the exhaust 10b are separated.

  Next, the configuration of the opening / closing sections 3 and 4 will be described with reference to FIG. 6 illustrating an enlarged perspective view of the opening / closing section 3. The opening / closing part 3 has a configuration in which an opening 31a is provided in the upper stage where the opening / closing areas 3a, 3b are located, and an opening 31b is provided in the lower stage where the opening / closing areas 3c, 3d are located. A region (opening / closing region) that is not connected to the first ventilation path 1a and the second ventilation path 1b is closed by the movable plate member 33 and is connected to the first ventilation path 1a and the second ventilation path 1b. This is a flow path switching mechanism that opens a region to form a flow path. Then, as the first and second operating states are switched, the movable plate member 33 is slid and the open / close states of the four open / close regions 3a, 3b, 3c, and 3d are reversed. FIG. 6 shows a state in which the movable plate member 33 is moving on the guide groove 32 serving as a rail. As shown in FIG. 6, the 2 × 2 open / close regions 3a to 3d are alternately opened and closed.

As shown in FIG. 6, the opening / closing part 3 is opened in the base 30 serving as a base, and the openings 31a and 31b connected to the first ventilation path 1a and the second ventilation path 1b of the heat exchanger 1, and these openings 31a. , 31b, a guide groove 32, transmission shafts 34a and 34b for transmitting rotational force, a gear 35 fixed to these shafts, and a movable plate member 33 having a helical rack portion 33a with which the gear 35 meshes. And reversing mechanisms 36a and 36b for reversing the rotation of the transmission shaft 34a and transmitting it to the transmission shaft 34b. Either one of the transmission shafts 34a and 34b is connected to a servo motor (not shown) or the like that gives rotational power, and the other is fitted to a bearing (not shown). The opening / closing part 3 constitutes a slide mechanism and is attached to a wall surface part facing the air supply / exhaust port of the storage part 2.
Note that the opening / closing part 3 and the opening / closing part 4 having the same configuration are used, for example, by being fixed to an edge of a region serving as a ventilation channel that is opened in advance in the wall surface of the storage part 2.

  Here, FIG. 7 is a diagram illustrating control states of the four open / close regions 3a to 3d and 4a to 4d of the open / close sections 3 and 4 when the heat exchange ventilator 100 is in the first operation state. 7 (a) is a cross-sectional side view of the main part taken along the line CC of FIG. 1, and FIG. 7 (b) is a cross-sectional side view of the main part taken along the line DD of FIG.

As shown in FIG. 7A, in the first operating state, for example, the movable plate member 33 that covers the opening 31a on the upper side of the opening / closing part 3 by half is positioned on the opening / closing area 3b. The area is closed, the open / close area 3a connected to one end of the first ventilation path 1a (the insertion section 11 of the heat exchanger 1) is opened, and the lower opening 31b of the open / close section 3 is halved. The movable plate member 33 that only closes is positioned on the open / close region 3c, closes the same region, and opens / closes the open / close region 3d connected to one end (the insertion portion 12) of the second ventilation path 1b.
Along with this, the opening / closing part 4 opens the opening / closing area 4a (one side of the lower opening 41b) connected to the other end (insertion part 13) of the first ventilation path 1a on the base 40. The open / close region 4d (one side of the upper opening 41a) connected to the other end (insertion portion 14) of the second ventilation path 1b is opened, and the other open / close regions 4b and 4d are closed with the movable plate member 43 and closed. State.
The movable plate member 33 is configured to move in the horizontal direction (row direction) with the switching of the flow path.

As shown in FIG. 7B, in the second operating state, the open / close regions 3a to 3d and 4a to 4d of the open / close sections 3 and 4 are opened / closed opposite to the first operating state. It becomes a state, the direction of the ventilation of the 1st ventilation path 1a and the 2nd ventilation path 1b can be made reverse, and the role of an air supply path and an exhaust path can be reversed.
The configuration of the transmission shafts 34a, 34b, the guide groove 32, etc. constituting the slide mechanism of the opening / closing part 3 shown in FIG. 6 may be provided either on the inner side or the outer side of the wall part of the storage part 2, and the partition part 2a , 20a so as not to interfere. The opening / closing part 4 is also arranged in the same manner.

Here, as shown in FIG. 7, the openings 31 a and 31 b of the opening and closing unit 3 are arranged in the upper and lower stages, the left row and the exhaust port where the opening and closing regions 3 a and 3 c to which the outside air inlet 21 is connected are arranged. It is also possible to provide in the right row where the open / close regions 3b and 3d to which 22 is connected are arranged, and the movable plate member 33 is configured to move in the vertical direction (row direction) corresponding to the arrangement. .
In addition, the flow path closing method is not limited to the slide type, but can also be a blind type (a system in which the opening is closed by changing the angle of a plurality of arranged plate members). It is also possible to apply a road switching method.

  The heat exchanger 1 is a total heat exchange type that exchanges the latent heat and sensible heat of the air flow in the first ventilation path 1a and the air flow in the second ventilation path 1b, or of the first ventilation path 1a. A sensible heat type that exchanges heat only between the sensible heat of the air flow and the air flow of the second ventilation path 1b can be used. Moreover, in order to prevent the deformation | transformation by condensation and icing, the raw material of the heat exchanger 1 may use a water-resistant raw material as a member which supports the ventilation path (air path) of the heat exchanger 1. FIG.

Next, the operation of the heat exchange ventilator 100 will be described using the flowchart of FIG. As described above, the heat exchange ventilator 100 has a function of switching alternately between the first operation state and the second operation state. Here, the operation control for removing condensation and icing in the heat exchanger 1 by switching between the first and second operation states as described above will be described.
Since dew condensation and icing that occur inside the heat exchanger 1 occur when the temperature difference between the outdoor and indoors becomes large, whether or not the defrost operation of the heat exchange ventilator 100 is necessary is determined in the controller 51 by the thermohygrometer 28, The determination is made based on the indoor temperature and humidity detected at 29, and the outdoor temperature and humidity.

First, the controller 51 determines the operating status of an indoor air conditioner (air conditioner) (step S101). When the air conditioner is ON and operating (Yes in Step S101), the operating state is read as to whether the current opening / closing unit 3 or 4 is in the first operating state or the second operating state. (Step S102).
Next, the outdoor and indoor temperatures and humidity are measured from the outputs of the thermohygrometers 28 and 29 (step S103). The dew point temperature T1 (outdoor dew point temperature) of the air flowing through the air supply path is calculated from the outdoor temperature and humidity (step S104).

  Next, the calculated T1 is compared with the temperature of the air flowing through the exhaust passage for heat exchange in the heat exchanger 1 (room temperature) (step S105). When the dew point temperature T1 is higher than the room temperature, Then, since dew condensation or icing occurs in the exhaust passage, it is determined that the defrost operation is necessary (Yes in step S105), and the control unit 51 issues an operation state switching command. At this time, the open / close state of the open / close units 3 and 4 is confirmed (step S108), and the open / close state of the open / close units 3 and 4 shifts from the first operation state to the second operation state (step S109), or second The operation state is shifted to the first operation state (step S110). And again, the control part 51 memorize | stores the opening-and-closing state of the opening-and-closing parts 3 and 4 (step S111).

If the dew point temperature T1 is lower than the room temperature in step S105 (No in step S105), the dew point temperature T2 (room dew point temperature) is calculated from the room temperature and humidity (step S106). The dew point temperature T2 is compared with the outdoor temperature (step S107). If the dew point temperature T2 is higher than the outdoor temperature (Yes in step S107), it is determined that condensation or icing occurs in one of the ventilation paths, and control is performed. The operation state switching command is issued from the unit 51, and the process proceeds to switching of the open / close state of the open / close units 3 and 4, that is, switching of the flow path (step S108).
When dew point temperature T2 is lower than the outdoor temperature (No in step S107), the process returns to step S103.

  Here, in the flow path switching (transition) in the heat exchange ventilator 100, if the operation state stored in the control unit 51 is the first operation state, the process proceeds to the second operation state. If it is in the operating state, it shifts to the first operating state. Specifically, when the operating state is changed, the servomotor connected to the transmission shaft 34a or the transmission shaft 34b is rotated to move. The expression plate member 33 (43) is slid to open and close the open / close states of the open / close regions 3a to 3d (4a to 4d). In steps S109 and S110 described above, the rotation direction of the servo motor is reversed.

After the operation state is changed, it is determined whether or not the operation of the air conditioner is OFF. If the operation of the air conditioner is continued with ON (No in step S112), the timer counts (step S113). After waiting for an arbitrary time (for example, 120 seconds) (step S114), the process returns to the beginning of the flowchart again (Yes in step S114). Then, the operation is continued while maintaining the exercise state stored in step S111 until the next defrost operation.
Note that if the determination in step S112 is Yes and the operation is stopped because the air conditioner is OFF, the flow ends.

  In the control of the defrost operation as shown in FIG. 8, in the heat exchange ventilation operation after the defrost operation, it is exemplified that the operation state is not changed until the next defrost operation is started. It is also possible to control the operation so that one ventilation path is used as an exhaust path and the other ventilation path is used as an air supply path only during defrost operation, mainly using one ventilation path as an air supply path and the other ventilation path as an exhaust path. Is possible.

  In steps S103 and S106 for calculating the dew point temperatures T1 and T2, the calculation is performed with 1 atm. Further, the control unit 51 stores information mapping the relationship between the airflow command value to the motor and the pressure in the heat exchanger 1, and based on this information, the pressure is estimated from the airflow command value from the air conditioner to the motor, and the dew point is determined. The temperatures T1 and T2 may be calculated.

  Here, the standby time by the timer (steps S113 and S114) is set to 120 seconds this time. This is the time set in consideration of the balance between the growth of dew condensation and ice in the heat exchanger 1 in the operation state after the operation state is changed and the defrost of the ventilation path in which condensation has occurred is possible. It has become. Since the speed of dew condensation / freezing grows faster as the difference between the dew point temperature T1 and the room temperature or the difference between the dew point temperature T2 and the outdoor temperature increases, for example, the standby time is the difference between the dew point temperature T1 and the room temperature or the dew point temperature. You may control so that it may become short when the difference of T2 and outdoor temperature is large.

  Further, in the operation control example of the heat exchanging ventilator 100 in FIG. 8, the operation determination of the air conditioner that performs indoor temperature adjustment is performed in steps S101 and S112, but the indoor temperature adjustment does not depend on the air conditioner. These steps can be omitted in the case of using another heating / cooling apparatus.

As described above, the first and second ventilation paths 1a and 1b of the heat exchanger 1 are provided with the opening / closing sections 3 and 4 that can switch from the supply path to the exhaust path and from the exhaust path to the supply path. In the heat exchange ventilator 100, the flow path is switched by the open / close sections 3 and 4 in order to remove the condensation and icing formed in one ventilation path of the heat exchanger 1 from the indoor and outdoor temperature and humidity. It becomes possible to perform defrost operation.
Needless to say, it is possible to suppress the occurrence of condensation or icing by controlling the flow path to be switched at the timing when condensation or icing occurs in one ventilation path of the heat exchanger 1.

  Thus, according to the heat exchange ventilator 100 according to the first embodiment of the present invention, the air supply of the two ventilation paths in the heat exchanger 1 can be performed without changing the blowing direction of the air supply fan 8a and the exhaust fan 8b.・ It is possible to reverse the direction of the air flow in the flow path so that the role of exhaust is reversed, and the air volume does not change even during defrost operation, and heat exchange efficiency and ventilation efficiency can be maintained. It becomes possible.

Embodiment 2. FIG.
Next, the heat exchange ventilator 100 according to Embodiment 2 of the present invention will be described with reference to FIGS. 9 and 10.
As shown in FIG. 1, the heat exchange ventilator 100 according to the first embodiment described above has the indoor air supply port 23 disposed at a position facing the outside air intake port 21 through which the air supply 10a is introduced, and the exhaust 10b. The indoor exhaust suction port 24 is disposed at a position opposite to the exhaust port 22 for exhausting air.
However, as shown in the top view of the heat exchanging ventilator 100 according to the second embodiment in FIG. 9, the indoor exhaust suction port 24 is disposed at a position facing the outside air suction port 21 and faces the exhaust port 22. It is also possible to adopt a configuration in which the indoor air supply port 23 is disposed at the position where the air supply is performed.

FIG. 10 is a side cross-sectional view showing the main part of the heat exchange ventilator 100 taken along the lines EE and FF of FIG. 9, and FIG. 10 (a) shows the opening and closing part 3 in the first operating state, FIG. 10 (b) shows the open / close state of each part of the open / close parts 3 and 4 in the second operation state.
As shown in FIG. 10A, when the heat exchange ventilator 100 according to the second embodiment is in the first operation state, outside air is taken in from the open / close region 3a of the open / close unit 3, and the open / close region of the open / close unit 4 The supply air 10a is supplied to the indoor side from 4b, the indoor exhaust 10b is taken in from the open / close region 4c, and the exhaust 10b is discharged from the open / close region 3d.
Further, as shown in FIG. 10 (b), when the heat exchange ventilator 100 according to the second embodiment is in the second operation state, the supply air 10a is taken in from the open / close region 3c of the open / close unit 3, and the open / close unit The supply air 10a conditioned by heat exchange is supplied from the open / close region 4d to the indoor side, the indoor exhaust 10b is taken in from the open / close region 4a, and the exhaust 10b after heat exchange is discharged from the open / close region 3b.

  As described above, when the indoor / outdoor air supply / exhaust ports are arranged so as to cross with respect to the heat exchange ventilator 100, one side (left side) of each opening 31a, 31b, 41a, 41b of the opening / closing part 3, 4 Or the air introduced into the heat exchanger 1 side from the right side) diffuses widely in the internal space of the storage unit 2 until it reaches the suction port (insertion unit 11 to 14) of the heat exchanger 1, and from the insertion unit 11 The air can be uniformly sent to the fine flow paths provided in a large number, and the heat exchange efficiency can be further improved.

  The heat exchanging ventilator 100 of this configuration can be mounted on a moving body such as a vehicle, and can also be applied to a building such as a house.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

DESCRIPTION OF SYMBOLS 1 Heat exchanger, 1a 1st ventilation path, 1b 2nd ventilation path 2 Storage part, 2a, 2b, 20a, 20b Partition part 3, 4 Opening / closing part, 3a, 3b, 3c, 3d, 4a, 4b, 4c 4d Open / close area 7 Fan motor, 8a Air supply fan, 8b Exhaust fan 9 Blower, 10a Air supply, 10b Exhaust 11, 12, 13, 14 Insertion part, 20 Housing 21 Outside air inlet, 22 Air outlet, 23 Air supply 24, exhaust outlet 28, 29 thermohygrometer, 30, 40 base 31a, 31b, 41a, 41b opening, 32 guide groove 33, 43 movable plate member, 33a helical rack 34a, 34b transmission shaft, 35 gear 36a, 36b Reverse rotation mechanism 41 Partition plate, 42 Spacing plate, 51 Control unit, 100 Heat exchange ventilator

In the heat exchange ventilator according to the present invention, the first and second ventilation paths that connect the outdoor space and the indoor space are combined, one of which is an air supply path and the other is an exhaust path. A first operating state comprising a heat exchanger for exchanging heat with the second ventilation path, wherein the first ventilation path is the air supply path, and the second ventilation path is the exhaust path When, the second ventilation path and the air supply path, the first ventilation path in the row cormorants heat exchange ventilator switching operation of the second operating state to the exhaust passage, the heat exchanger and The heat exchanger is provided on one wall surface portion of the storage portion that surrounds the internal space leading to the first and second ventilation paths, and the first and second ventilation paths are connected to each other through the different internal spaces. Adjusting the connection between one end, the outside air intake port that draws in air supply from the outside, and the exhaust port that exhausts air outside Provided on the other wall surface portion of the storage portion on the indoor space side, and through the different internal spaces, the other ends of the first and second ventilation paths, and the room The flow of the indoor side channel opening / closing unit for adjusting the connection state with the air supply port for supplying air supply, the exhaust inlet for sucking the exhaust from the room, the flow of the outdoor channel opening / closing unit and the indoor side channel opening / closing unit A control unit that controls the open / close state of the road based on indoor and outdoor temperature and humidity, and the outdoor channel opening / closing unit and the indoor channel opening / closing unit are the first and second operating states of the control unit. In response to the switching command, the outside air inlet and the air supply are arranged so that the directions of the air flow in the first ventilation path and the second ventilation path are reversed and outside the wall portion facing each other. mouth, that the exhaust port and the exhaust inlet port is controlled so that the arrangement and cross Patent It is an.

Claims (8)

The first and second ventilation paths connecting the outdoor space and the indoor space are combined, and heat is generated between the first ventilation path and the second ventilation path, one of which is an air supply path and the other is an exhaust path. With a heat exchanger to be exchanged,
The first operating state in which the first ventilation path is the air supply path and the second ventilation path is the exhaust path, the second ventilation path is the air supply path, and the first ventilation path is A heat exchange ventilator that performs a switching operation with a second operation state in which the path is the exhaust path. Provided on one wall surface portion of the storage portion surrounding the heat exchanger, one end of the first and second ventilation paths, an outside air intake port for sucking air from the outside, and an exhaust port for discharging the exhaust to the outside Outdoor channel opening and closing part to adjust the connection state of
Provided on the other wall surface portion of the storage portion on the indoor space side, the other ends of the first and second ventilation paths, an air supply port for supplying air to the room, and an exhaust for sucking the exhaust from the room An indoor channel opening / closing part that adjusts the connection state with the suction port,
A control unit for controlling the channel open / close state of the outdoor channel open / close unit and the indoor channel open / close unit based on indoor and outdoor temperature and humidity;
The outdoor flow path opening / closing section and the indoor flow path opening / closing section are connected to the first ventilation path and the second ventilation path in accordance with a switching command for the first and second operation states in the control section. The heat exchange ventilator according to claim 1, wherein the airflow direction is controlled so as to be reversed. In the first operating state,
The outdoor channel opening / closing part connects the outside air inlet to one end of the first ventilation path, and connects the exhaust port to one end of the second ventilation path,
The indoor channel opening / closing part connects the air supply port to the other end of the first ventilation path, and connects the exhaust suction port to the other end of the second ventilation path.
In the second operating state,
The outdoor channel opening / closing part connects the outside air inlet to one end of the second ventilation path, and connects the exhaust port to one end of the first ventilation path,
The indoor channel opening / closing part connects the air supply port to the other end of the second ventilation path and connects the exhaust suction port to the other end of the first ventilation path. The heat exchange ventilator according to claim 2.   The outdoor flow path opening / closing section and the indoor flow path opening / closing section close a region not connected to the first and second ventilation paths with a movable plate member, and the first and second ventilation paths. 4. The heat according to claim 2, wherein the movable plate member is moved in accordance with switching between the first and second operating states. Exchange ventilation device.   The controller stores the temperature and humidity obtained indoors and outdoors, calculates the dew point temperature from the outdoor temperature and humidity, and when the dew point temperature exceeds the indoor temperature, the airflow in the first and second ventilation paths The heat exchange ventilator according to any one of claims 2 to 4, wherein a command for switching the operation state is issued so that the direction of the is reversed.   The controller stores the temperature and humidity obtained indoors and outdoors, calculates the outdoor dew point temperature from the outdoor temperature and humidity, and if the outdoor dew point temperature does not exceed the indoor temperature, the indoor dew point is calculated from the indoor temperature and humidity. The temperature is calculated, and when the indoor dew point temperature exceeds the outdoor temperature, an operation state switching command is issued so that the direction of the airflow in the first and second ventilation paths is reversed. The heat exchange ventilator according to any one of 4.   The heat exchange ventilator according to any one of claims 1 to 6, wherein the heat exchanger is water-resistant and formed of a total heat exchange type or sensible heat exchange type material.   The heat exchange ventilator according to any one of claims 1 to 7, wherein the heat exchange ventilator is mounted on a vehicle.

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