JP5473785B2 - Heat exchange ventilator - Google Patents

Description

  The present invention is formed so that an exhaust passage from the indoor side to the outdoor side and an air supply passage from the outdoor side to the indoor side are exchanged, and a heat exchange element is provided at the intersection, and exhaust and The present invention relates to a heat exchange type ventilator that exchanges heat by supplying air.

  A technology for an air conditioner that has an indoor heat exchanger and a humidifying element on the downstream side of a blower fan and operates the blower fan for a set time for the purpose of drying the humidifier after the humidification heating operation is stopped has been disclosed. (For example, refer to Patent Document 1).

  In addition, a humidifier is placed in the ventilation path of the blower, and after the operation is stopped, the internal pressure of the air supply layer of the humidifier is increased by blowing air from the blower, and forced drainage is performed by applying pressure to the water retained in the humidifier conduit The technique about the humidifier made to do is disclosed (for example, refer to patent documents 2).

JP 2007-303744 A Japanese Patent Laid-Open No. 11-166752

  However, according to the above conventional technique, for example, as disclosed in Patent Document 1, the humidifier can be dried, but there is a problem that it does not have a function of assisting drainage of the humidified water.

  Further, according to the above conventional technique, as disclosed in Patent Document 2, for example, the water in the water guide body of the humidifier is drained, but even if the drainage of the humidified water is completed, the blower is operated unnecessary. There is a possibility that the blower stops and the drainage is not performed sufficiently even if the drainage is continued or the drainage of the humidified water is not completed.

  This invention is made in view of the above, Comprising: In the ventilator provided with the humidification means for attaching the additional value of moisture with respect to indoor air supply, it can raise the drainage property of humidification water at low cost. The purpose is to obtain a heat exchange type ventilation device.

  In order to solve the above-described problems and achieve the object, the present invention provides heat exchange means for exchanging heat between outside air and room air, and the outside air taken in via the heat exchange means from an outdoor air supply port. An air supply means for supplying air into the room from the indoor air supply port; an exhaust means for exhausting the indoor air taken in from the indoor air exhaust port through the heat exchange means to the outside from the outdoor air discharge port; A humidifying means that is disposed between the means and the indoor air supply port, and humidifies the air when supplying air into the room, a water supply means for supplying humidifying water to the humidifying means, and a humidifying means from the humidifying means. And a drainage means for draining water to a drain pipe, and performing a drainage backflow prevention operation for operating the air blowing means for a duration of the backflow prevention operation after the humidification operation by the humidification means is completed.

  ADVANTAGE OF THE INVENTION According to this invention, in the heat exchange type | formula ventilation apparatus provided with the humidification means, there exists an effect that it becomes possible to improve drainage at low cost.

FIG. 1 is a diagram illustrating a configuration of a heat exchange type ventilator according to first to eighth embodiments of the present invention. FIG. 2 is a flowchart showing an outline of the drainage backflow prevention operation. FIG. 3 is a sequence diagram illustrating heat exchange type ventilator control during drainage backflow prevention operation according to the first embodiment. FIG. 4 is another sequence diagram illustrating heat exchange type ventilator control during drainage backflow prevention operation according to the first embodiment. FIG. 5 is a flowchart illustrating a control method of the heat exchange type ventilator according to the second embodiment. FIG. 6 is a flowchart illustrating a control method of the heat exchange type ventilator according to the third embodiment. FIG. 7 is a flowchart illustrating a control method of the heat exchange type ventilator according to the fourth embodiment. FIG. 8 is a flowchart illustrating a control method of the heat exchange type ventilator according to the fifth embodiment. FIG. 9 is a flowchart illustrating a control method of the heat exchange type ventilator according to the sixth embodiment. FIG. 10 is a flowchart illustrating a control method of the heat exchange type ventilator according to the seventh embodiment. FIG. 11 is a flowchart illustrating a control method of the heat exchange type ventilator according to the eighth embodiment.

  Embodiments of a heat exchange type ventilator according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
An outline of the structure and control of the heat exchange type ventilator according to the present embodiment will be described below. FIG. 1 shows the configuration of a heat exchange type ventilator 16 according to a first embodiment of the present invention, together with other heat exchange type ventilators 14 and 15 connected via a collective water distribution pipe 13 (drain pipe). FIG. In FIG. 1, the whole mode including the other heat exchange type ventilators 14 and 15 connected to the collecting water pipe 13 to which the heat exchange type ventilator 16 is connected is shown.

  In the heat exchange ventilator 16, an air supply passage for supplying air from the outdoor air supply port 1 (OA side) through the heat exchange element 2 (heat exchange means) to the indoor air supply port 3 (SA side) ( The air supply fan 4 (air blowing means) and the humidifier 5 (humidification means) for applying moisture to the indoor air supply are respectively provided in OA → SA). In addition, an exhaust fan 8 (exhaust means) is provided in an exhaust passage (RA → EA) that exhausts air from the indoor exhaust port 6 (RA side) through the heat exchange element 2 to the outdoor exhaust port 7 (EA side). ing. The heat exchange element 2 is a heat exchange means for exchanging heat between the outside air and the room air.

  Further, in the vicinity of the connection portion of the heat exchange type ventilator 16 with the collective water distribution pipe 13, there is a water detection sensor 9 for detecting the backflow water from the drain pipe (collective water distribution pipe 13), and air is sent from the drain port toward the drain pipe. Thus, a backflow prevention blower fan 17 (backflow prevention blower means) for enhancing the drainage backflow prevention effect is provided. Further, an SA airflow damper 18 is further installed to enhance the drainage backflow prevention effect by sealing the indoor air supply port 3 during the drainage backflow prevention operation and increasing the pressure in the heat exchange ventilator 16.

  The water detection sensor 9 has a structure in which, for example, two electrodes to which a voltage is applied are in an insulated state, and water detection is performed by eliminating a potential difference between the electrodes when water comes into contact. A remote controller 12 is provided as an operation means for remotely operating the heat exchange type ventilation device 16. The communication method between the heat exchange type ventilation device 16 and the remote controller 12 may be wired communication or wireless communication, and is not limited.

  The heat exchange ventilator 16 includes a water supply means (not shown) for supplying humidification water to the air supply fan 4, the exhaust fan 8, and the humidifier 5 based on a command from the remote controller 12, and a humidifier. 5 is provided with a drain box (not shown) for draining humidified water from 5, a backflow prevention blower fan 17, and a control box 10 for transmitting a control signal to the SA air path damper 18.

  And in the control box 10, the situation of the detection of the backflow water from the drain pipe by the water detection sensor 9 (detection means), and the operation of the other heat exchange type ventilators 14 and 15 connected to the same collective water distribution pipe 13 Information collecting means 11 for obtaining the status is provided. The operation states of the other heat exchange type ventilators 14 and 15 collected by the information collecting unit 11 are held in a storage unit (not shown) provided in the control box 10.

  Next, an outline of the drainage backflow prevention operation will be described using the flowchart of FIG. First, in step S1, the heat exchange type ventilator 16 and the other heat exchange type ventilators 14 and 15 are in an operating state, and the respective fans are operated. In the case of the heat exchange type ventilation device 16, for example, the air supply fan 4 operates.

  Then, the pressure in the heat exchange ventilator 16 on the SA side in FIG. 1 increases due to the pressure loss of the air passage piping from the blower to the room where the air is supplied. The drain pipe (collecting water pipe 13) for draining the humidified water / drain water is connected to the heat exchange ventilator 16 on the SA side, so that the wind pressure is also applied to the drain pipe during operation of the blower. As shown in step S2, the pressure in the drain pipe (collecting water distribution pipe 13) rises.

  In step S3, it is determined whether or not there is a request for stopping the operation of the heat exchange ventilator 16, and if there is a request (YES), the process proceeds to step S4, and if there is no request (NO), the process proceeds to step S8. In step S4, it is determined whether or not all (both) other heat exchange type ventilators 14 and 15 have an operation stop request, and if both have an operation stop request (YES), the process proceeds to step S8. If not (NO), the process proceeds to step S5.

  In step S5, it is determined whether or not the heat exchange ventilator 16 has a drain backflow operation request. If there is a request (YES), the process proceeds to step S8. If there is no request (NO), the process proceeds to step S6. move on.

  In step S6, the heat exchange type ventilator 16 is stopped, and / or one of the other heat exchange type ventilators 14 and 15 is in operation. The pressure in the collective water distribution pipe 13 is positive. Therefore, as shown in step S7, a reverse flow of the waste water of the heat exchange type ventilator 16 occurs.

  In step S8, since the heat exchange type ventilator 16 is in operation or all of the heat exchange type ventilator 16 and the other heat exchange type ventilators 14 and 15 are stopped, the apparatus of the heat exchange type ventilator 16 is stopped. The inside is more positive than the inside of the collecting water distribution pipe 13, or there is no pressure difference, and the humidified water / drain water of the heat exchange type ventilator 16 is drained normally (step S9).

  3 and 4 are sequence diagrams of heat exchange type ventilator control during drainage backflow prevention operation. FIG. 3 is a sequence diagram when the heat exchanging ventilator 16 is stopped simultaneously with the end of the humidifying operation by the humidifier 5, and Ta is a backflow preventing operation duration arbitrarily determined as a time for executing the drainage backflow preventing operation. It's time.

  In FIG. 3, when the heat exchanging ventilator 16 is stopped simultaneously with the end of the humidifying operation, the blower fan (air supply fan 4) is delayed for the backflow prevention operation duration Ta thereafter. Thereby, the pressure in the heat exchange ventilator 16 can be maintained at a pressure equal to or higher than the pressure in the collective water distribution pipe 13 (drainage pipe), and the drainage of the humidified water can be improved.

  FIG. 4 is a sequence diagram in the case where the air exchange operation of the heat exchanging ventilator 16 is performed even after the humidification operation is completed, and Ta is a backflow prevention operation predetermined based on various conditions as a time for executing the drainage backflow prevention operation. The duration, Tb is the air blowing operation time after the end of the humidifying operation, and Tc is the difference time between Ta and Tb. In FIG. 4, since the air exchange operation is performed even after the humidification operation is completed in the heat exchange type ventilator 16, the operation of the blower fan (air supply fan 4) is substituted for the drainage backflow prevention operation.

  Then, the fan operation time Tb after the humidification operation is counted, and when the fan operation time Tb does not reach the backflow prevention operation duration Ta determined as the time for executing the drainage backflow prevention operation, the difference time Tc (= Ta The operation of the air supply fan 4 is continued as the drainage backflow prevention operation only for -Tb). For example, the following equation is used as a calculation formula for the difference time Tc.

  Difference time Tc = backflow prevention operation duration Ta−air blowing operation time Tb

Backflow prevention operation duration Ta defined as drainage backflow prevention operation is
[1] The amount of water drained from the heat exchange ventilator 16 per unit time
[2] Thickness of drainage pipe (collective water distribution pipe 13)
[3] The pressure difference between the inside of the heat exchange type ventilator 16 and the drain pipe during drainage backflow prevention operation is used as a parameter, and for example, 1 hour is set as a standard. Further, the backflow prevention operation duration Ta may be arbitrarily changed by the user (user) using the remote controller 12.

Embodiment 2. FIG.
A control method of the heat exchange type ventilator according to the present embodiment will be described below. The configuration of the system including the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that of FIG. 1 of the first embodiment, and the state of drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  First, in step S10, the process starts from a state in which the blower (air supply fan 4) flag of the heat exchange type ventilation device 16 is “OFF”. In step S11, it is determined whether or not there is a fan operation request for the heat exchange type ventilator 16. If there is a request (YES), the process proceeds to step S12, and if there is no request (NO), the process proceeds to step S15. In step S15, the humidifier 5 is not operated because there is no blower operation request. Therefore, the humidified water is drained.

  On the other hand, if there is a fan operation request in step S11, the process proceeds to step S12 and the fan flag is turned on. In step S13, it is determined whether there is a humidifier operation request, and if there is a request (YES). If there is no request (NO), the process proceeds to step S15.

  When it progresses to step S14, humidification water is supplied to the humidifier 5, and humidification operation is started. Thereafter, when the humidifying operation is finished in step S40, the process proceeds to step S15 and the humidified water is drained as described above. After the humidified water is drained from the humidifier in step S15, the count time of the drainage backflow prevention operation is cleared in the next step S16, and the process proceeds to step S17.

  In step S17, it is determined whether or not “drainage backflow prevention operation time ≧ Ta (backflow prevention operation duration determined in advance as a time for continuing drainage backflow prevention operation)”, and “drainage backflow prevention operation time ≧ Ta If "" (YES), the process proceeds to step S21, and if "drainage backflow prevention operation time <Ta" (NO), the process proceeds to step S18.

  When the process proceeds to step S18, the blower flag is turned ON, the process proceeds to step S20, the blower (air supply fan 4) is operated, the drainage backflow prevention operation time is counted in step S22, and the process returns to step S17. Then, this loop is repeated until “drainage backflow prevention operation time ≧ Ta”.

  On the other hand, in step S17, “drainage backflow prevention operation time ≧ Ta” (YES), and when the process proceeds to step S21, the blower (air supply fan 4) is stopped and the blower flag “OFF” state in step S10 is returned. .

  As described above, the drainage of the humidified water is improved by performing the drainage backflow prevention operation after the humidification operation is completed. That is, even when other ventilators connected to the same collective water pipe are in operation, the exhaust port side of the ventilator is set to a positive pressure with respect to the collective piping by operating the blower of the ventilator. Therefore, it becomes possible to improve the drainage of humidified water.

  Moreover, by using the blower of the heat exchange type ventilator as the drainage promoting means for the humidified water, drainage performance can be improved at low cost without requiring new drainage equipment and drainage techniques. In addition, when the air blowing operation is performed after the humidification operation is completed, energy saving can be efficiently achieved by substituting the operation for the drainage backflow prevention operation. If the air blowing operation time after the humidification operation does not reach the backflow prevention operation time set as the drainage backflow prevention operation, drainage backflow prevention operation can be performed for the difference time, and it is possible to promote drainage without excess and deficiency. Drainage and energy saving can be achieved.

  Further, in the above embodiment, the user may be able to arbitrarily set the airflow of the air supply fan 4 during the drainage backflow prevention operation time and the drainage backflow prevention operation using the remote controller 12 or the like. Thereby, convenience and reliable drainage can be achieved.

Embodiment 3 FIG.
The configuration of the system including the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that in FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 6, steps S10 to S16 and S40 are the same as those in the second embodiment. In this embodiment, in step S17, it is determined whether or not “drainage backflow prevention operation time ≧ Ta (backflow prevention operation duration determined in advance as the duration of drainage backflow prevention operation)”. If “prevention operation time ≧ Ta” (YES), the process proceeds to step S23, and if “drainage backflow prevention operation time <Ta” (NO), the process proceeds to step S18. Thereafter, the blower flag is set to “ON” in step S18, and the process proceeds to step S20 to operate the air supply fan 4. After step S22, the process returns to step S17 as in the second embodiment.

  When it progresses to step S23, it is discriminate | determined whether the water detection sensor 9 of FIG. 1 with which the drainage system was equipped detected the humidified water backflow water from a drainage pipe (collection water distribution pipe 13), and when it detects ( YES), the process proceeds to step S18, and the blower flag is set to “ON”. That is, the drainage backflow prevention operation time has elapsed for the backflow prevention operation duration Ta or more, but it is determined that the drainage backflow prevention operation is still insufficient, and the air supply fan 4 is continuously operated with the blower flag set to “ON”. Since the process proceeds to step S23, the loop of steps S18, S20, S22, S17, and S23 is repeated until the water detection sensor 9 no longer detects the humidified water.

  In step S23, when the water detection sensor 9 does not detect the humidified water backflow water (NO), the process proceeds to step S19. Step S19 stops the air supply fan 4 in step S21 when the humidified water backflow water is not detected in step S23 and the blower flag is “OFF”. Even if the humidified water backflow water is not detected in step S23, if the blower flag is “ON”, the process proceeds to step S41 and the air supply fan 4 is operated.

  After step S41, the blower flag is set to “OFF” only when a blower stop request is received in step S42. After step S42, the process proceeds to step S19, where it is determined whether the blower flag is "ON" or "OFF". If the blower flag is "OFF", the supply fan 4 is stopped in step S21. After step S21, the process returns to step S10 as in the second embodiment.

  In addition, the air volume of the air supply fan 4 may be increased during the drainage backflow prevention operation by detecting the backflow of humidified water from the drain pipe. As described above, by using the detection result of the water detection sensor provided in the drainage system for the control of the drainage backflow prevention operation, the presence or absence of the humidified water backflow from the drain pipe can be added to the judgment of the drainage backflow prevention operation control. It becomes possible. As a result, it is possible to achieve reliable, efficient and energy-saving drainage without excess or deficiency.

  Further, instead of or in combination with the air supply fan 4 during the drainage backflow prevention operation, the backflow prevention blower fan 17 may be used, based on the amount of water detected by the water detection sensor 9 and / or the water detection time. The air flow of the air supply fan 4 and the backflow prevention blower fan 17 during the drainage backflow prevention operation time and the drainage backflow prevention operation may be adjusted. Further, even when the air supply fan 4 is in the weak air blowing operation, the water detection sensor 9 may perform a strong operation if it detects backflow water from the drain pipe.

Embodiment 4 FIG.
The configuration of the system comprising the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that in FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 7, steps S10 to S16 and S40 are the same as those in the second embodiment. In this embodiment, in step S24, for example, the information collecting means 11 monitors whether or not the other heat exchange type ventilators 14 and 15 connected to the same collective water distribution pipe 13 are in operation. On the other hand, if it is in operation (YES), the process proceeds to step S17, and the drainage backflow prevention operation is performed until the backflow prevention operation duration Ta.

  On the other hand, if both the heat exchange type ventilators 14 and 15 are stopped (NO) in step S24, the process proceeds to step S19. The operation states of other devices collected by the information collecting means 11 are always held in a storage means (not shown) provided in the control box 10 and can be used for the determination in step S24. That is, in the present embodiment, the information collecting means 11 and the storage means constitute monitoring means for monitoring the operating state of the other heat exchange type ventilators 14 and 15.

  In step S17, it is determined whether or not “drainage backflow prevention operation time ≧ Ta (a backflow prevention operation duration predetermined as a time for continuing drainage backflow prevention operation)”, and “drainage backflow prevention operation time ≧ Ta”. If (YES), the process proceeds to step S19, and if “drainage backflow prevention operation time <Ta” (NO), the process proceeds to step S18. Steps S18 to S22 and S41 and S42 are the same as in the third embodiment.

  Further, when the number of operating ventilators connected to the same collective water distribution pipe 13 is large, the air volume of the air supply fan 4 may be increased. That is, the drainage backflow prevention operation time and the air flow rate of the air supply fan 4 may be adjusted according to the operating conditions of other ventilation devices connected to the same collective water distribution pipe 13.

  Further, the backflow prevention blower fan 17 may be used instead of or in combination with the air supply fan 4 at the time of the drainage backflow prevention operation, and the operation state of other heat exchange type ventilators connected to the same collective water distribution pipe 13 On the basis of the above, the air flow of the air supply fan 4 and the backflow prevention blower fan 17 during the drain backflow prevention operation time and the drain backflow prevention operation may be adjusted.

  As described above, in the heat exchange type ventilator of the present embodiment, the operation state of other heat exchange type ventilators connected to the same collecting water pipe 13 is reflected in the drain backflow prevention operation control. Specifically, the presence / absence of drainage backflow prevention operation, the time, the air flow rate of the air supply fan, and the like are changed according to the operation status of other ventilation devices connected to the same collective drainage pipe. As a result, reliable and efficient drainage can be realized without excess and deficiency, and energy saving can be achieved.

Embodiment 5 FIG.
The configuration of the system comprising the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as in FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 8, steps S10 to S15 are the same as those in the second embodiment. In the present embodiment, when humidifying water is supplied to the humidifier 5 in step S14 and the humidifying operation is started, the humidifying operation time is counted in step S25. Thereafter, the humidifying operation is ended (step S40), and the process proceeds to step S15.

  After the humidified water is drained in step S15, it is determined in step S26 whether or not “humidifying operation time ≧ Td (short-term humidifying time)”. If it determines with "humidification operation time> = Td" (YES) in step S26, it will progress to step S16 and will clear drainage backflow prevention operation time. If it is determined in step S26 that “humidifying operation time <Td” (NO), the process proceeds to step S19. The short-term humidification time Td is a predetermined time, and may be changed by the user using the remote controller 12.

  Steps S17 to S22 and S41 and S42 are the same as in the fourth embodiment. In the present embodiment, after step S21, the humidifying operation time is further cleared in step S27, and the process returns to step S10. Also in the present embodiment, the backflow prevention blower fan 17 may be operated instead of or in combination with the supply fan 4 during the drainage backflow prevention operation.

  As described above, in the present embodiment, when the humidification operation time is shorter than the predetermined short-term humidification time Td, the drain backflow prevention operation is not performed and the afterrun by the air supply fan 4 is omitted. . Thereby, energy saving property can be improved. Moreover, you may make it change the time of a waste_water | drain backflow prevention driving | operation, the air volume of the air supply fan 4, etc. according to the length of humidification driving | operation time.

Embodiment 6 FIG.
The configuration of the system composed of the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that of FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 9, steps S10 to S14 are the same as those in the second embodiment. In the present embodiment, after the humidification operation is requested in step S13 and the humidification water is supplied in step S14 and the humidification operation is started, it is determined in step S28 whether or not the timer operation is requested in the humidification operation. . The timer operation is to perform the humidification operation for a time determined in advance by the user.

  In step S28, if timer operation is requested (YES), the process proceeds to step S29, and if timer operation is not requested (NO), the process proceeds to step S40. In step S40, the process proceeds to step S15 when the humidification operation is not requested by the timer operation and the humidification operation is terminated by a user instruction or the like.

  In step S29, it is determined whether or not “remaining time of humidification operation ≧ Te (humidification margin time)”. If “remaining time of humidification operation ≧ Te” (YES), the process proceeds to step S25 and the humidification operation time. And returns to step S29. If “remaining time of humidification operation <Te” (NO), the process proceeds to step S15 (humidified water drainage).

  The humidifying margin time Te is requested by the timer operation with the humidified water remaining in the humidifier 5 even when the humidifier 5 is not supplied any more when the timer operation is required. The time until the time is a predetermined time estimated as a time during which humidification can be continued.

  Accordingly, when the process proceeds from step S29 to step S15, the water supply to the humidifier 5 is stopped and the humidified water is drained before the timer operation ends. Thereafter, the humidification operation is continued until the “remaining time of the humidification operation” becomes zero, that is, until the timer operation end time. After the humidification operation is completed, the process proceeds to step S16 to clear the drainage backflow prevention operation time. On the other hand, when it progresses to step S15 from step S11, S13, S40, since humidification operation is not carried out from the beginning, or since humidification operation is complete | finished and the humidifier 5 has already stopped, humidification water is stopped by step S15. The humidifier 5 remains stopped after draining.

  The “remaining time of the humidifying operation” in step S29 is a remaining time obtained by subtracting the time of actually performing the humidifying operation from the scheduled execution time of the humidifying operation determined by the user, and the predetermined time Te is The user may be able to change with the remote controller 12. In the present embodiment, after step S25 (humidification operation time counting), the loop returning to step S29 is repeated until “remaining humidification operation time <Te” (NO).

  Steps S16 to S22, S27, S41, and S42 are the same as in the fifth embodiment. Also in the present embodiment, the backflow prevention blower fan 17 may be operated instead of or in combination with the supply fan 4 during the drainage backflow prevention operation.

  As described above, according to this embodiment, when the humidifying operation is performed by the timer operation, the water supply to the humidifying element (humidifier 5) is stopped and the draining operation is performed before the timer operation ends. At this time, since there is humidified water remaining in the humidifying element, the amount of humidification by the humidifier 5 does not decrease. Therefore, it is not necessary to perform the residual value operation (after-run) as the drainage backflow prevention operation, or the backflow prevention operation duration can be shortened. Therefore, it is possible to improve energy saving.

Embodiment 7 FIG.
The configuration of the system including the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that in FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 10, if the blower flag of the heat exchange type ventilator 16 is “OFF” in step S10, it is determined in step S11 whether or not there is an operation request for the blower (supply fan 4). . If there is a request (YES), the process proceeds to step S12, and if there is no request (NO), the process proceeds to step S30.

  In step S30, the backflow prevention blower fan 17 is operated, and the process proceeds to step S15. In step S11, there is an operation request for the blower (air supply fan 4) (YES), the process proceeds to step S12, and if there is no operation request to the humidifier 5 in the subsequent step S13, the process also proceeds to step S30. Moreover, when there exists a humidification operation request | requirement by step S13 and it progresses to step S14 and S40 and the driving | operation of the humidifier 5 is complete | finished, it progresses to step S30.

  After the humidified water is drained from the humidifier in step S15, the count time of the drainage backflow prevention operation is cleared in the next step S16, and the process proceeds to step S17. In step S17, it is determined whether or not “drainage backflow prevention operation time ≧ Ta (backflow prevention operation duration predetermined as drainage backflow prevention operation)”. If “drainage backflow prevention operation time ≧ Ta” (YES), Then, the process proceeds to step S32, the backflow prevention blower fan 17 is stopped, and the process proceeds to step S19.

  If “drainage backflow prevention operation time <Ta” (NO) in step S17, the process proceeds to step S31. In step S31, the drainage backflow prevention operation time is counted, the process returns to step S17, and the drainage backflow prevention operation is continued until “drainage backflow prevention operation time ≧ Ta” (YES). 17 is used together.

  In addition, when it comes to step S17 with the blower flag = “OFF”, the drainage backflow prevention operation is performed only by the backflow prevention blower fan 17. Further, when the supply fan 4 is requested to stop during the drain backflow prevention operation, the supply fan 4 may be stopped and only the backflow prevention blower fan 17 may be operated to perform the drain backflow prevention operation.

  In step S32, the backflow prevention blower fan 17 is stopped, and in step S19, whether the blower flag is “ON” or “OFF” is determined. If the blower flag is “ON”, the air supply fan 4 is continuously operated (step S20). If it is “OFF”, the air supply fan 4 is stopped (step S21), and the process returns to step S10.

  As described above, the drainage backflow prevention effect can be enhanced by operating the backflow prevention blower fan 17, which is a dedicated small fan installed at the drain outlet during the drainage backflow prevention operation, and blowing air toward the drain pipe. Moreover, energy saving can be achieved efficiently by using the backflow prevention blower fan 17 without using the air supply fan 4 for indoor air supply as the backflow prevention operation of the waste water.

  In addition, if sufficient airflow prevention effect cannot be obtained only by the air flow of the backflow prevention blower fan 17, the drainage backflow prevention operation by the air supply fan 4 for indoor air supply may be used together. Also in this case, even if the operating time and the air volume of the air supply fan 4 are reduced, a sufficient drainage backflow prevention effect can be obtained, so that energy saving can be achieved. Further, also in the above embodiment, the air volume of the air supply fan 4 or the backflow prevention blower fan 17 during the drainage backflow prevention operation may be arbitrarily set by the user using the remote controller 12 or the like.

Embodiment 8 FIG.
The configuration of the system comprising the heat exchange type ventilator 16 and the external heat exchange type ventilators 14 and 15 is the same as that of FIG. 1 of the first embodiment, and the state of the drain backflow prevention operation control is shown in the flowchart of FIG. It explains using.

  In the flowchart of FIG. 11, steps S10 to S12 are the same as those in the second embodiment. If the process proceeds to step S12, in step S33, the damper (SA air path damper 18) installed in the indoor air supply port is set to “OPEN”, and the process proceeds to step S13.

  On the other hand, if there is no operation request for (supply fan 4) in step S11, the process proceeds to step S34, the SA air path damper 18 is closed (CLOSE), and the process proceeds to step S15. Steps S13 to S22 and S40 are the same as those in the second embodiment, but steps S35 and S36 are added between steps S17 and S18. In step S35, it is determined whether or not the blower operation request from the user is at that time.

  If there is a blower operation request in step S11, the SA air path damper 18 remains “OPEN” even after the humidification operation in step S40 is completed. This is to confirm again whether there is a blower operation request. If there is no blower operation request from the user at this time, the process proceeds to step S36 and the SA air path damper 18 is set to “CLOSE”. Thereby, the pressure in the heat exchange ventilator 16 can be raised and the drainage backflow prevention effect can be improved.

  As described above, in this embodiment, the pressure in the heat exchange type ventilator 16 is increased by closing the SA air path damper 18 installed in the indoor air supply port 3 during the drain backflow prevention operation. The backflow prevention effect can be improved. Further, since the sufficient drainage backflow prevention effect can be obtained even if the operation time and the air volume of the air supply fan 4 for indoor air supply are reduced, it is possible to improve energy saving. Furthermore, also in this embodiment, during the drainage backflow prevention operation, the backflow prevention blower fan 17 may be operated instead of or in combination with the air supply fan 4, and the SA air path damper 18 is closed. The drainage backflow prevention effect can be improved.

  When the drain pipe for discharging humidified water / drain water of the external treatment unit is a collective pipe, when the operation of the heat exchange ventilator is stopped, other units connected to the same collective pipe ( For example, drainage may not be performed depending on the operation status of the heat exchange ventilator. For example, if another ventilator is in operation, the drainage pipe has a positive pressure rather than the suspended ventilator, and the pressure difference prevents drainage from the heat exchange ventilator. There was a case where the water that had flowed back.

  In the above embodiment, drainage backflow prevention operation is performed when the heat exchange type ventilator is stopped, and the drainage is improved by keeping the pressure in the ventilator at or above the pressure in the drainage pipe. Specifically, in order to improve drainage, drain backflow prevention operation (after-run) is performed when the heat exchange ventilator is stopped.

  In addition, the operation status of the heat exchange ventilator and other heat exchange ventilators connected to the same collective drainage pipe, and detection of backflow water from the drain pipe by the backflow detection sensor installed in the drainage system (drainage port) Information such as quantity is used as a variable for blower fan control. That is, the blower is controlled based on the information, for example, the auxiliary operation for draining the humidified water only when the other unit (ventilator) is in operation or only when the backflow water detection sensor detects water. Perform drainage backflow prevention operation.

  When another ventilator connected to the same collective pipe is operating, the pressure in the collective pipe is also increased by the wind pressure, but the air exchange fan operating state of the heat exchange ventilator supplies air from the apparatus Due to the pressure loss of the air duct piping leading to the room, the pressure in the apparatus can be kept higher than the pressure in the collecting pipe. Thus, by operating the blower fan during drainage of the device, the pressure in the device can be maintained at or above the drainage pipe, and drainage performance can be improved.

  In the above embodiment, by controlling the pressure difference so that the pressure in the apparatus (inside the machine) is maintained at or higher than the pressure in the drain pipe by delaying the operation of the blower fan (after-run) for the duration of the backflow prevention operation after completion of the humidification operation, Improve drainage. When the air blowing operation is performed after the humidification operation, the time is measured as a substitute for the drainage backflow prevention operation. However, if the airflow operation time does not reach the backflow prevention operation duration defined as the time for maintaining the drainage backflow prevention operation, the drainage backflow prevention operation is performed for the difference time. Thereby, the drainage efficiency of humidified water can be improved.

  Furthermore, if the humidifying operation time is short, the function to prevent the drainage backflow prevention operation is performed, and if the humidifying operation is performed by the timer operation, the function to perform the drainage operation by stopping the water supply to the humidifying element before the timer operation ends, A function that blows air using a dedicated small fan during backflow prevention operation, and a function that improves the drainage backflow prevention effect by closing the damper installed at the indoor air supply port during drainage backflow prevention operation. Further prepare.

  As described above, according to the present embodiment, since the existing blower is used as the drainage promoting means for the humidified water, the drainage performance can be improved at low cost without requiring new drainage equipment and drainage techniques. Moreover, the stable drainage property which is not influenced by the driving | running state of the other unit (for example, heat exchange type ventilator) joined to the same collective piping is acquired. Further, when the air blowing operation is performed after the humidifying operation is completed, when the humidifying operation time is short, or when the equipment connected to the same collective pipe is not operated, the drain operation can be omitted, and energy saving can be achieved.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. When an effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention. Furthermore, the constituent elements over different embodiments may be appropriately combined.

  As described above, the heat exchange type ventilator according to the present invention is useful for increasing the drainage performance of the humidifier at low cost, and in particular, a humidifier for adding an added value of moisture to indoor air supply. Suitable for heat exchange type ventilator with

DESCRIPTION OF SYMBOLS 1 Outdoor side air supply port 2 Heat exchange element 3 Indoor side air supply port 4 Air supply fan 5 Humidifier 6 Indoor side exhaust port 7 Outdoor side exhaust port 8 Exhaust fan 9 Water detection sensor 10 Control box 11 Information collection means 12 Remote control 13 Collective water distribution pipes 14, 15 Other heat exchange ventilators 16 Heat exchange ventilators S1 to S23 Steps

Claims (6)

Heat exchange means for exchanging heat between the outside air and the indoor air;
A blowing means for supplying the outside air taken in through the heat exchange means from the outdoor air supply opening to the room from the indoor air supply opening;
Exhaust means for exhausting the indoor air taken from the indoor side exhaust port through the heat exchanging means to the outside from the outdoor side exhaust port;
Humidification means that is disposed between the air blowing means and the indoor air supply port and humidifies the air supply to the room;
Water supply means for supplying humidifying water to the humidifying means;
Drainage means for draining the water for humidification from the humidification means to a drain pipe ;
Comprising monitoring means for monitoring the operating state of another heat exchange type ventilator connected to the drain pipe ;
A heat exchange type ventilator that performs a drainage backflow prevention operation for operating the air blowing means based on the operating state for a duration of a backflow prevention operation after the humidifying operation by the humidifying means is completed. Further comprising a backflow prevention blowing means for blowing air to the drain pipe,
The heat exchange type ventilator according to claim 1, wherein the backflow preventing air blowing unit is operated after the humidification operation. It further comprises detection means for detecting the backflow of the drainage from the drainage pipe,
The heat exchange ventilator according to claim 1 or 2, wherein the drainage backflow prevention operation is performed only while the detection means detects the backflow of drainage. 3. The heat exchange type ventilator according to claim 1, wherein when the time during which the humidification operation is performed is shorter than the short-term humidification time, the drainage backflow prevention operation is not performed. The drainage by the drainage means is performed at a time before a humidification allowance time from a scheduled end time of the humidification operation when the humidification operation is set to be executed for a predetermined time. Or the heat exchange type ventilator of 2. A damper capable of opening and closing the indoor air supply port;
The heat exchange ventilator according to claim 1 or 2, wherein the indoor air supply port is closed during the drainage backflow prevention operation.

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