JP5865213B2 - Drain pump unit, humidified total heat exchange ventilator with drain pump unit, and air conditioner with drain pump unit - Google Patents

Description

  The present invention relates to a drain pump unit for forcibly draining drain water, a humidified total heat exchange ventilator equipped with a drain pump unit, and an air conditioner.

  2. Description of the Related Art Conventionally, an air conditioner is provided with a drain pan that accumulates condensed water generated in a heat exchanger and humidified water generated from a humidifier as drain water. The drain water that has flowed into the drain pan is naturally discharged to the outside by a pipe gradient of a drain pipe that is normally connected, or is forced to be discharged to the outside by a built-in drain pump unit.

  Even in an air conditioner without a built-in drain pump or a humidified total heat exchange type ventilator, natural drainage is not possible due to the slope of the drain pipe in an installation location where the ceiling is not high and the slope of the drain pipe cannot be taken. In some cases, drain water that has flowed into the drain pan may be forcibly discharged. In such a case, a drain pump unit is provided separately from the air conditioner or the humidified total heat exchange type ventilator, and the drain water in the drain pan of the air conditioner or the humidified total heat exchange type ventilator is supplied by the drain pump unit. It discharges to the outside.

  This type of drain pan is subject to legal inspection under the Building Sanitation Law, and it is necessary to carry out regular cleaning and maintenance. However, since the drain pan is integrally provided inside the air conditioner or drain pump unit, the air conditioner or drain pump unit behind the ceiling must be disassembled for cleaning and maintenance. There is a problem that it takes time and cost for cleaning and maintenance.

  Drain pans are rarely cleaned and maintained on a regular basis because of the labor and cost of drain pan cleaning and maintenance. When draining with the drain pump unit forcibly, when the drain pan is not regularly cleaned and maintained, dirt or slime is generated on the drain pan, and dirt or slime such as dust is sucked into the drain pump. However, there is also a problem of causing a control error or water leakage due to drainage failure of drain water.

  Therefore, conventionally, as a method for easily cleaning and maintaining the drain pan, there is a technique that facilitates cleaning and maintenance of the drain pan by providing a drain mechanism of the drain pump unit and opening the drain pan (for example, Patent Documents). 1).

  Further, as a method for easily cleaning and maintaining the drain pan, a technique for making the drain pan drawable and housed and facilitating the cleaning and maintenance of the drain pan is disclosed (for example, see Patent Document 2).

Japanese Patent No. 3670820 Japanese Patent No. 3802531

  In the technique described in Patent Document 1 described above, there is a problem that it is impossible to install the drain pump unit when there is no ceiling pocket and there is no space for opening the drain pan. In addition, when drain water is drained by a drain pump, dead water is always generated in the drain pan. Therefore, when the drain pan is opened for cleaning and maintenance, water may be spilled on the ceiling surface.

  In the technique described in Patent Document 2, when there is no drain pump, the drain pan can be drawn out and stored. However, when draining with a drain pump, in order to ensure drainage, it is common to install a drain pump at a position several mm above the drain pan. In this case, the drain pump becomes an obstacle, There was a problem that the drain pan could not be pulled out and stored.

  The present invention has been made to solve the above-described problems, and is a drain pump unit that can easily perform cleaning and maintenance even when the ceiling pocket is low, and a humidified total heat equipped with the drain pump unit. An object is to provide an exchange type ventilation device and an air conditioner including a drain pump unit.

The drain pump unit according to the present invention includes a housing, a drain pan that is disposed in the housing and stores drain water from the outside, and is provided in the housing so as to be able to be taken in and out in the vertical direction, and the drain water stored in the drain pan. a unit having a drain pump to drain to the exterior suction is arranged above the drain pan in the casing, and a power control box having a control circuit which controls the operation of the drain pump, the unit, by cutting and raising a side formed by having the upper locking piece and the lower locking piece, the power control box or housing, support is provided with upper support piece and the lower supporting piece formed by cutting and raising the side, upper locking units the stop piece and the lower locking piece, when engaged are engaged with the upper support piece and the lower support piece of the power control box or housing of the support, in use the unit It held above the location, and the movable drain pan in the horizontal direction.

According to the present invention, when the unit is locked to the power supply control box or the housing, the unit is held above the position in use and the drain pan can move in the horizontal direction. Dirt due to dust or the like and slime can be easily cleaned. Therefore, the drain pump is not clogged by dirt or slime in the drain pan, and the problem of water leakage due to poor drainage of drain water can be solved.
Further, it is easy to periodically clean the drain pan behind the ceiling and maintain the drain pump, and the working time can be shortened. In addition, since the drain pump unit can be cleaned and maintained from one direction, it can be expected to reduce the maintenance space behind the ceiling.

It is a perspective view which shows the inside of the humidification total heat exchange type | formula ventilation apparatus which concerns on embodiment of this invention. It is a perspective view which shows the state which attached the drain pump unit to the humidification total heat exchange type ventilator of FIG. It is a perspective view which shows the state before attaching a drain pump unit to the humidification total heat exchange type ventilator of FIG. It is a perspective view which decomposes | disassembles and shows the drain pump unit which concerns on embodiment of this invention. It is a perspective view which decomposes | disassembles and shows the drain pump sensor unit of FIG. It is front sectional drawing of the drain pump unit which removes and shows the maintenance cover which concerns on embodiment of this invention. It is a front view which removes and shows the maintenance cover of the drain pump unit concerning an embodiment of the invention. It is a perspective view which removes and shows both the maintenance cover and drain pump sensor unit of a drain pump unit concerning an embodiment of the invention. It is a front view which shows the state which moved the drain pump sensor unit which concerns on embodiment of this invention to the arrow A direction, and was hooked on the maintenance hook. It is a perspective view which shows the state which hooked the drain pump sensor unit which concerns on embodiment of this invention on the maintenance hook, and the state which moved the drain pan to the arrow B direction.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a drain pump unit and a humidified total heat exchange ventilator equipped with the drain pump unit of the present invention will be described.
FIG. 1 is a perspective view showing the inside of a humidified total heat exchange ventilator according to an embodiment of the present invention, and FIG. 2 shows a state in which a drain pump unit is attached to the humidified total heat exchange ventilator. FIG. 3 is a perspective view showing a state before the drain pump unit is attached to the humidifying total heat exchange type ventilator of FIG. In the figure, reference numeral OA indicates outdoor air, reference numeral SA indicates supply air, reference numeral RA indicates return air, and reference numeral EA indicates exhaust air.

  As shown in FIGS. 1 to 3, the humidified total heat exchange type ventilator 1 includes a casing formed in a rectangular parallelepiped shape by sheet metal, and has a cylindrical shape on one side surface in the longitudinal direction of the casing. A formed outside air inlet 8 and an exhaust outlet 11 are provided, and a cylindrical air supply outlet 9 and an indoor air inlet 10 are provided on the other side surface. The humidified total heat exchange type ventilator 1 is installed in a space behind the ceiling and is concealed by a ceiling material.

  An air supply air passage 12 for supplying the outside air OA to the room as the air supply SA and an exhaust air passage 13 for discharging the indoor return air RA to the outside as the exhaust air EA are provided inside the casing. On the air supply path 12, the air supply fan 2, the direct expansion coil 5 for heating / cooling the air from the air supply fan 2, and the humidifier 6 for humidifying the air that has passed through the direct expansion coil 5 are provided. Is arranged. An exhaust fan 3 is disposed on the exhaust air passage 13. Further, in the supply air passage 12 and the exhaust air passage 13, a heat exchange element 4 that performs heat exchange between the outside air and room air is installed between the supply air blower 2 and the exhaust air blower 3.

  The supply air passage 12 includes a pre-heat exchange supply air passage 12 a provided between the outside air inlet 8 and the heat exchange element 4, a heat exchange supply air passage 12 b provided in the heat exchange element 4, and the heat exchange element 4. A post-heat exchange air supply air passage 12c provided between the air supply outlet 9 and the air supply outlet 9 is provided. The exhaust air passage 13 includes a pre-heat exchange exhaust air passage 13 a provided between the indoor air inlet 10 and the heat exchange element 4, a heat exchange exhaust air passage 13 b provided in the heat exchange element 4, and the heat exchange element 4. And an exhaust air passage 13 c after heat exchange provided between the exhaust air outlet 11 and the exhaust air outlet 11.

  The heat exchange element 4 has a perforated flat plate heat exchange air flow path 12b formed by bonding corrugated paper (corrugated sheet) on the flat paper, and similarly corrugated paper (corrugated sheet) on the flat paper. A plurality of formed flat plate-shaped heat exchange exhaust air passages 13b are stacked so that the direction of the supply air passage 12 and the direction of the exhaust air passage 13 are orthogonal to each other. Heat exchange is performed between the supply air SA that passes through the exhaust gas 13 and the exhaust gas EA.

  The humidifying total heat exchange type ventilator 1 has a humidifying part drain pan 7 that receives water discharged from the humidifier 6 and condensed water generated when cooled by the direct expansion coil 5. A drain outlet 14 for draining the water accumulated in the water is provided.

  As a drainage of the water accumulated in the humidifying part drain pan 7, there is a method in which the PVC pipe is connected to the drain outlet 14 in a state where the pipe is inclined downward, and drained by utilizing the natural gradient of the PVC pipe. Uses a drain pump unit 15 that forcibly drains the drain water accumulated in the humidifying part drain pan 7.

  As shown in FIG. 2, the drain pump unit 15 is attached to a connection fitting 16 attached to a side surface of the casing near the air supply / exhaust port 9, and is connected to the drain drain port 14 via a dedicated drain hose 17. ing. As shown in FIG. 3, the drain pump unit 15 is attached to the side of the housing with a connection fitting 16 fixed with screws, the drain pump unit 15 is attached to the connection fitting 16 with screws, etc. The outlet 14 and the drain pump unit 15 are connected by a drain hose 17. The drain water accumulated in the humidifying part drain pan 7 of the humidifying total heat exchange type ventilator 1 flows into the drain pump unit 15 through the drain hose 17.

FIG. 4 is an exploded perspective view showing the drain pump unit according to the embodiment of the present invention.
The drain pump unit 15 is attachable to and detachable from the unit housing 18, a box-shaped drain pan 19 having an opening at the top, a drain pump / sensor unit 20, a power supply control box 21, a maintenance cover 22, and the power supply control box 21. And a box cover 23 attached to the box. In the power supply control box 21, a substrate on which various components constituting the power supply circuit and the control circuit are mounted is accommodated. The drain pump / sensor unit 20 has an upper surface plate 26 attached to the top thereof. The upper surface plate 26 accommodates the drain pump / sensor unit 20 in the unit housing 18 so that it can be taken in and out in the vertical direction.

FIG. 5 is an exploded perspective view of the drain pump / sensor unit of FIG.
The drain pump / sensor unit 20 includes a drain pump 28, a drain pump fixing plate 24 having a drain pump 28 attached to the lower surface thereof in a detachable manner, two drain pump / sensor fixing plates 25, and the upper surface plate 26. The maintenance piece 27, the float switch 29, and the water detection sensor 30 are included.

  The drain pump fixing plate 24 is sandwiched between two drain pump / sensor fixing plates 25 and fixed with screws. The float switch 29 and the water detection sensor 30 are respectively attached to support plates 29a and 30a formed in an L shape, and can be attached to and detached from one drain pump / sensor fixing plate 25 via the support plates 29a and 30a. Is attached. With this configuration, the drain pump / sensor unit 20 can be disassembled when maintenance of the drain pump 28, the float switch 29, and the water detection sensor 30 is required.

FIG. 6 is a front sectional view of the drain pump unit with the maintenance cover removed.
The length of the drain pump / sensor unit 20 in the vertical direction is set so that the suction port of the drain pump 28 is located several mm above the bottom surface of the drain pan 19. Although the suction port of the drain pump 28 may be installed at a distance from the drain pan 19, a large amount of drainage is accumulated in the drain pan 19, and the risk of water leakage increases. Therefore, the suction port of the drain pump 28 is connected to the drain pan 19. It is common to install several millimeters away from the bottom surface of.

  The drain water collected in the humidifying part drain pan 7 of the humidified total heat exchange type ventilator 1 flows into the drain pan 19 of the drain pump unit 15 through the drain hose and is stored. When the water level accumulated in the drain pan 19 increases to some extent, the float of the float switch 29 floats, the switch is turned on, and the drain pump 28 is operated. When the drain pump 28 operates, the water accumulated in the drain pan 19 is pumped up, passes through the drain pump hose 31 connected to the drain pump 28, and is drained from the unit drain port 32 attached to the unit housing 18. Further, when the water level of the drain water accumulated in the drain pan 19 rises due to some abnormality, the water detection sensor 30 detects it and inputs it to the control circuit as an error signal.

  The drain pan 19, the drain pump 28, the float switch 29, and the water detection sensor 30 require regular maintenance and cleaning. In particular, the drain pump 28 may be clogged due to dirt on the drain pan 19 or the cause of slime. When the drain pump 28 is clogged, a drain water drainage failure occurs, so that the drain pan 19 must be regularly cleaned.

Next, maintenance of the drain pan 19 and the drain pump 28 of the drain pump unit 15, the float switch 29, and the water detection sensor 30 will be described with reference to FIGS.
FIG. 7 is a front view of the drain pump unit according to the embodiment of the present invention with the maintenance cover removed, and FIG. 8 shows both the drain pump unit maintenance cover and the drain pump / sensor unit according to the embodiment of the present invention. FIG. 9 is a front view showing a state where the drain pump / sensor unit according to the embodiment of the present invention is moved in the direction of arrow A and hooked on the maintenance hook, and FIG. 10 is a perspective view showing the embodiment of the present invention. It is a perspective view which shows the state which hooked the drain pump sensor unit which concerns on a maintenance hook, and the state which moved the drain pan to the arrow B direction.

When performing maintenance and cleaning of the drain pan 19, the drain pump 28, the float switch 29, and the water detection sensor 30, the maintenance cover 22 is removed.
When maintenance of the drain pan 19 is performed, a part of the drain pump / sensor unit 20, that is, the drain pump 28, the float switch 29, and the water detection sensor 30 are stored in the drain pan 19. Then, the inside of the drain pan 19 cannot be cleaned well (see FIG. 7). Although the inside of the drain pan 19 cannot be cleaned in this state, it becomes a very difficult operation because it is a work behind the ceiling, and it is difficult to say that it is possible to reliably clean. The slime cannot be removed reliably, causing the drain pump 28 to be clogged.

  In order to facilitate cleaning of the drain pan 19 in a state where a part of the drain pump / sensor unit 20 is housed in the drain pan 19, it is necessary to move the drain pump / sensor unit 20 from the inside of the drain pan 19. It becomes.

  Thus, in the drain pump unit 15 of the present embodiment, the drain pan 19 is supported on the side surface of the power source control box 21 attached to the unit housing 18 on the side of the drain pump / sensor unit 20 so that the drain pan 19 can be easily cleaned. A body 33 is provided. As shown in FIGS. 7 and 8, the support 33 is formed in a box shape that is open on one side, and is provided with an upper support piece 33 a and a lower support piece 33 b that are formed in an L shape by cutting and raising.

  As shown in FIGS. 5 and 6, the maintenance piece 27 constituting the drain pump / sensor unit 20 is engaged with an upper stage locking piece 27a and a lower stage supporting piece 33b which are engaged with and locked with the upper stage supporting piece 33a. A pair of lower locking pieces 27b that are locked together are provided. The upper locking piece 27 a and the lower locking piece 27 b are formed by cutting and raising the maintenance piece 27.

  In the present embodiment, as shown in FIG. 9, the drain pump / sensor unit 20 is lifted upward (in the direction of arrow A), and the upper locking piece 27a and the lower locking piece 27b of the maintenance piece 27 are controlled by power supply control. The upper support piece 33 a and the lower support piece 33 b provided on the support 33 of the box 21 are engaged and locked, respectively, and the drain pump / sensor unit 20 is hooked on the power supply control box 21. By this hooking, the drain pump / sensor unit 20 is positioned above the drain pan 19, so that the drain pan 19 can be pulled out from the drain pump unit 15 (arrow B direction) or stored (arrow C direction). Although the drain pump / sensor unit 20 is hooked on the power control box 21, this is an example and is not limited.

As described above, according to the embodiment, when cleaning the drain pan 19 behind the ceiling, the maintenance cover 22 of the drain pump unit 15 is opened, the drain pump / sensor unit 20 is lifted upward, and the power control box 21 is opened. Therefore, the drain pan 19 can be easily cleaned and the cleaning time can be shortened.
In addition, since the drain pump unit 15 can be cleaned and maintained from one direction (arrows B and C), the maintenance space on the back of the ceiling can be expected to be reduced.
Further, when the drain pump / sensor unit 20 is hooked on the power control box 21, the drain pump / sensor unit 20 is positioned above the drain pan 19, so that the maintenance of the drain pump 28, the float switch 29, and the water detection sensor 30 is easy. It becomes.

  In the embodiment, the drain pump / sensor unit 20 is hooked on the power supply control box 21, but instead, the drain pump / sensor unit 20 faces the maintenance cover 22 in the unit housing 18. You may make it catch on the side to do. In this case, a support body 33 having an upper support piece 33 a and a lower support piece 33 b is provided on the side surface of the unit housing 18, and of the pair of drain pump / sensor fixing plates 25 constituting the drain pump / sensor unit 20, A pair of latches engaged with and locked to the upper support piece 33a and the upper support piece 33a on the drain pump / sensor fixing plate 25 on the side facing the support 33. A lower locking piece 27b is provided.

Even in this configuration, when the drain pan 19 is cleaned behind the ceiling, the maintenance cover 22 of the drain pump unit 15 is opened, the drain pump / sensor unit 20 is lifted upward, and the drain pump / sensor fixing plate 25. Therefore, the drain pan 19 can be easily cleaned and the cleaning time can be shortened.
Moreover, since the drain pump unit 15 can be cleaned and maintained from one direction, a reduction in maintenance space behind the ceiling can be expected.
Further, when the drain pump / sensor unit 20 is hooked on the drain pump / sensor fixing plate 25, the drain pump / sensor unit 20 is positioned above the drain pan 19, so that the drain pump 28, the float switch 29, and the water detection sensor 30 Maintenance becomes easy.

  In the embodiment, the use of the drain pump unit 15 in the humidified total heat exchange type ventilator is described as an example, but the same effect can be obtained even if the drain pump unit 15 is applied to an indoor unit of an air conditioner. Play.

  DESCRIPTION OF SYMBOLS 1 Humidification total heat exchange type ventilator, 2 Supply blower, 3 Exhaust blower, 4 Heat exchange element, 5 Direct expansion coil, 6 Humidifier, 7 Humidifier drain pan, 8 Outside air suction port, 9 Supply air discharge port DESCRIPTION OF SYMBOLS 10 Indoor air inlet, 11 Exhaust outlet, 12 Supply air path, 12a Supply air path before heat exchange, 12b Heat exchange air supply path, 12c Supply air path after heat exchange, 13 Exhaust air path, 13a Exhaust before heat exchange Air passage, 13b Heat exchange exhaust air passage, 13c Exhaust air passage after heat exchange, 14 Drain drain port, 15 Drain pump unit, 16 Connection fitting, 17 Drain hose, 18 Unit housing, 19 Drain pan, 20 Drain pump / sensor unit , 21 Power control box, 22 Maintenance cover, 23 Box cover, 24 Drain pump fixing plate, 25 Drain pump / sensor Fixed plate, 26 Top plate, 27 Maintenance piece, 27a Upper locking piece, 27b Lower locking piece, 28 Drain pump, 29 Float switch, 29a Support plate, 30 Water detection sensor, 30a Support plate, 31 Drain pump hose, 32 Unit drain port, 33 support, 33a upper support piece, 33b lower support piece.

Claims (4)

A housing,
A drain pan disposed in the housing and storing drain water from the outside;
A unit having a drain pump that is provided so as to be able to be taken in and out in the vertical direction in the housing, and that sucks drain water stored in the drain pan and drains it to the outside.
A power control box disposed in the casing above the drain pan and having a control circuit for controlling the operation of the drain pump;
The unit has an upper locking piece and a lower locking piece formed by cutting and raising the side surface,
The power supply control box or the housing is provided with a support body having an upper support piece and a lower support piece formed by cutting and raising the side surface,
When the upper stage locking piece and the lower stage locking piece of the unit are engaged with and locked to the power supply control box or the upper stage support piece and the lower stage support piece of the support of the housing, the unit is drain pump units held above the position of use, characterized in that to allow moving the drain pan in the horizontal direction.   2. The drain pump unit according to claim 1, wherein when the unit is locked to the power supply control box or the housing, the drain pump of the unit is positioned above the drain pan. 3. An air supply fan for sucking outside air and supplying the air into the room;
An exhaust fan for sucking indoor air and exhausting it outside,
A heat exchange element for exchanging heat between the outside air sucked by the air supply fan and the indoor air sucked by the exhaust fan;
A ventilation drain pan for storing internal drain water;
Total heat exchange type ventilator with humidification, characterized in that it includes a drain pump unit according to claim 1 or 2 Symbol placement for draining drain water stored in the ventilation drain pan to the outside. Outdoor unit,
An indoor unit connected to the outdoor unit via a refrigerant pipe;
An air conditioner characterized by comprising a drain pump unit according to claim 1 or 2 Symbol placement discharging the drainage of the indoor unit to the outside.

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