JP6862489B2 - Drain pump unit for air conditioner - Google Patents

Description

The present disclosure relates to a drain pump unit for an air conditioner.

The drain pump unit for an air conditioner according to the present disclosure is used for draining drain water in a ceiling-embedded air conditioner in which an indoor heat exchanger and a drain pan are arranged on the outlet side of an indoor blower. As an example shown in FIG. 12, such a ceiling-embedded air conditioner 101 is attached to a suction duct 104 that sucks indoor air from a plurality of suction ports 103 attached to the ceiling 102 and to the ceiling 102. It is provided with an outlet duct 106 for blowing cold air from a plurality of outlets 105. Since the indoor blower 107 installed in the machine requires a high static pressure for duct blowing, a sirocco fan is generally used. A partition wall is provided between the outlet side and the suction side of the indoor blower 107, and the indoor heat exchanger 108 and the drain pan 109 are installed in a positive pressure region. A water pipe 111 for guiding the drain water collected in the drain pan 109 to the drain pump unit 110 is connected to the drain port of the drain pan 109.

The drain pump unit 110 is connected to a drain tank 113 provided with a water guide port 112 for connecting a water pipe 111, a drain pump 114 for discharging the drain water stored in the drain tank 113, and a discharge side of the drain pump 114. It is provided with a drainage pipe 115 or the like. Although the details of the drain tank 113 are not shown in FIG. 12, the drain tank 113 includes a water storage portion for storing drain water and an upper lid portion for closing the upper opening of the water storage portion, and the water guide port 112 is provided on the upper lid portion. ing. The drain pump unit 110 is provided with control parts such as a float switch for controlling the start and stop of the pump according to the water level of the drain water in the drain tank 113, but this is omitted in this figure.

When the drain water is guided into the drain tank 113 like the drain pump unit 110, there is a risk of water droplets scattering, and a method for preventing the water droplets from scattering has been conventionally devised. The method is described in Patent Document 1. In the method for preventing water droplets from splashing described in Patent Document 1, a drip-proof plate that catches the drain water at an angle is arranged directly under the drain port, and a notch is provided at the corner of the drain tank of the drip-proof plate for drainage. It is designed to flow gently along the inner wall of the tank.

Jikkai Sho 59-184016

However, in the ceiling-embedded air conditioner 101 shown in FIG. 12, the high static pressure of the indoor blower 107 acts on the drain pan 109, and a part of the blown air from the indoor blower 107 is inside the water pipe 111 together with the drain water. Was flowing into. For this reason, the drain water drained to the water inlet 112 of the drain pump unit 110 is affected by the dynamic pressure of the mixed air, and the momentum of the drain water inflow is increased. Therefore, the method for preventing water droplets from scattering described in Patent Document 1 is insufficient as a measure for avoiding the scattering of drain water in this case.

An object of the present disclosure is to provide a drain pump unit for an air conditioner that suppresses the scattering of drain water that vigorously falls into a drain tank due to air contamination.

The drain pump unit for an air conditioner according to the first aspect has a receiving portion for receiving the drain water conducted from the air conditioner, a drain tank for storing the drain water dropped from the receiving portion, and the drain tank. It has a drain pump device that drains the stored drain water, and the receiving portion expands the air from the air conditioner that flows in with the drain water and the water guide port that connects the water guide pipe that conducts the drain water. It is provided with an expansion chamber for causing the water to collide, a collision portion for colliding the drain water flowing from the water guide port, and a water drop port for dropping the drain water colliding with the collision portion into the drain tank. It is formed larger than the opening area of the water inlet.

According to such a configuration, the flow velocity of the drain water flowing into the receiving portion is weakened by the collision of the drain water at the collision portion, and the dynamic pressure of the air flowing into the receiving portion together with the drain water is the expansion of the air in the expansion chamber. Is weakened by. After the momentum is weakened, the flow velocity of the drain water flowing into the receiving portion and the wind speed of the air are gently dropped into the drain tank from the water outlet whose passage area is expanded.

According to the drain pump unit for an air conditioner according to the second aspect, the collision portion is a wall surface forming an outer wall of the receiving portion facing the water guide port, and the water falling port is an outer wall of the receiving portion. It is formed on a wall surface that does not face the water inlet.

According to such a configuration, since the collision portion uses the wall surface forming the outer wall of the receiving portion, the configuration of the collision portion and the configuration of the receiving portion can be simplified.
According to the drain pump unit for an air conditioner according to the third aspect, the water drop port is formed on the wall surface forming the outer wall of the receiving portion facing the water guide port while avoiding the position facing the water guide port. The collision portion is formed so as to face the water guide port on the wall surface forming the outer wall of the receiving portion facing the water guide port.

According to such a configuration, both the collision portion and the waterfall port are formed on one of the wall surfaces constituting the outer wall of the receiving portion, which faces the water guide port, so that the receiving portion can be miniaturized and the receiving portion can be miniaturized. It can be simplified.

According to the drain pump unit for an air conditioner according to the fourth aspect, the collision portion is composed of an opposing member provided in the receiving portion.
With such a configuration, restrictions on the positional relationship between the water inlet and the waterfall port are relaxed. The flow velocity of the drain water falling into the drain tank from the water falling port and the wind speed of the air can be adjusted by the configuration of the opposing member forming the collision portion.

According to the drain pump unit for an air conditioner according to the fifth aspect, the water drop port is composed of a plurality of drain water drop openings.
According to such a configuration, it is possible to improve the flexibility of setting the position of the waterfall port and the opening area of the waterfall port.

The schematic block diagram of the drain pump unit for an air conditioner which concerns on 1st Embodiment. External perspective view of the drain pump unit. It is a drawing which omitted the heat insulating material of the receiving part in the drain pump unit, and is the view of arrow A in FIG. BB sectional view in FIG. It is a figure of the receiving part which concerns on 2nd Embodiment, and is the figure corresponding to FIG. FIG. 5 is a sectional view taken along the line CC in FIG. The perspective view which shows the receiving part which concerns on 3rd Embodiment. The perspective view which shows the receiving part which concerns on 4th Embodiment. The cross-sectional view which shows the receiving part which concerns on 5th Embodiment. The cross-sectional view which shows the receiving part which concerns on 6th Embodiment. FIG. 10 is a sectional view taken along line DD in FIG. Schematic configuration diagram of an air conditioning system using a conventional drain pump unit for an air conditioner.

The drain pump unit for an air conditioner according to each embodiment will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to the examples described below, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. To.

The drain pump unit for an air conditioner of the present disclosure is used in an air conditioner system using a duct connection type ceiling-embedded air conditioner similar to the air conditioner system shown in FIG. 10 as a conventional example. Generally, as a duct connection type ceiling-embedded air conditioner, a so-called push-in type in which an indoor heat exchanger and a drain pan are provided on the outlet side of the indoor blower, and an indoor heat exchanger and a drain pan are provided on the suction side of the indoor blower. There are two types, the so-called suction type. The drain pump unit for an air conditioner of the present disclosure is the drain water of a so-called push-in type, duct connection type ceiling-embedded air conditioner among these two types of duct connection type ceiling-embedded air conditioners. It is used for processing.

In a so-called push-in type, duct connection type ceiling-embedded air conditioner, a high static pressure air pressure acts on the drain water stored in the drain pan. In addition, the air blown out from the indoor blower is converted into dynamic pressure and flows into the water pipe that conducts the drain water together with the drain water. For this reason, in the drain pump unit used for drain water treatment of a push-in type, duct connection type ceiling-embedded air conditioner, the flow velocity of the drain water to be conducted is high, and the air mixed with the drain water flows. It is necessary to be able to cope with the phenomenon that the wind speed is also fast.

(First Embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, the drain pump unit 1 of the present disclosure drains drain water from a push-in type, duct connection type, ceiling-embedded air conditioner. The drain pump unit 1 includes a receiving portion 10 for receiving drain water, a main body portion 20 for accommodating the drain tank 21, a pump unit 30 including a drain pump device 31 for discharging the drain water stored in the drain tank 21. It has an upper lid portion 40 that closes the upper portion of the main body portion 20. In the following description, when referring to the front-back, left-right, and up-down directions of the drain pump unit 1, the directions shown in FIG. 2 shall be referred to.

The receiving portion 10 is a portion that receives the drain water vigorously flowing in from the push-in type, duct connection type ceiling-embedded air conditioner. The function of the receiving unit 10 is to temporarily receive the inflowing drain water and drop the drain water into the drain tank 21 while suppressing the scattering of the drain water.

The receiving portion 10 is attached to the upper surface of the left side portion of the upper lid portion 40. The receiving portion 10 includes an expansion chamber 11 that expands the air flowing in from the ceiling-embedded air conditioner together with the drain water and converts the dynamic pressure of the air into a static pressure. The receiving portion 10 includes an expansion chamber 11, a water guide port 13 connected to the water pipe 12, and a water drop port 14 for dropping the drain water flowing from the water guide port 13 into the drain tank 21. Further, the receiving portion 10 is provided with a collision portion 15 so that the drain water vigorously flowing in from the water guide port 13 does not flow into the drain tank 21 from the water drop port 14 as it is. The collision portion 15 collides the drain water flowing in from the water guide port 13 before flowing to the water drop port 14 to reduce the flow velocity.

In the receiving portion 10 of the first embodiment, the expansion chamber 11 is a container having a rectangular parallelepiped shape and forming a closed space portion having a predetermined volume inside. The volume of the closed space portion is set to a size having an expansion function that converts the dynamic pressure of the inflowing air into a predetermined static pressure. The water guide port 13 is formed at a substantially central portion on the left side surface of the expansion chamber 11. As shown in FIGS. 3 and 4, the water drop port 14 is formed on the lower surface of the expansion chamber 11. The waterfall port 14 is formed with three short tubular ones. The opening area of the three water falling ports 14 is set to be about three times larger in this embodiment so as to be larger than the opening area of the water guiding port 13. The collision portion 15 is a wall surface forming an outer wall of the expansion chamber 11 facing the water guide port 13. In the expansion chamber 11, a resin container serving as a skeleton is formed, and a heat insulating material is attached to the outer surface portion of the container.

The main body 20 is a rectangular parallelepiped in which the drain tank 21 is housed in the main body case 22 which is open at the top.
From the left, the drain tank 21 is composed of three parts, a drain water receiving part 23, a storage part 24, and a reserve storage part 25. The falling water receiving portion 23 is a portion that receives the drain water dropped from the receiving portion 10. The water drop receiving unit 23 is a portion where the drain water first flows into the drain tank 21, and has a guiding function to the storage unit 24. The storage unit 24 stores a certain amount of drain water and operates the drain pump device 31 without any trouble. As a result, the drain water generated by the ceiling-embedded air conditioner is discharged without any trouble. The reserve storage unit 25 is a portion that temporarily stores the overflowing drain water when the drain water overflows from the storage unit 24 for some reason.

The upper surface of the drain tank 21 is made of a hard resin plate, and the lower surface thereof is made of a heat insulating material. The drain tank 21 is formed to have external dimensions that are fitted and assembled in the main body case 22. The drain tank 21 has a tapered side surface so that it can be easily fitted into the main body case 22.

The main body case 22 has a steel plate case 22a as an inner surface, and a heat insulating material 22b is attached to the outer surface of the steel plate case 22a. On the left and right sides of the steel plate case 22a, mounting portions 22c for fixing the screw rod 26 for suspending the drain pump unit 1 itself are provided. The screw rod 26 is passed through a notch hole formed in the horizontal portion of the mounting portion 22c, and nuts 27 are tightened from above and below to be fixed to the horizontal portion.

The pump unit 30 includes a drain pump device 31.
The drain pump device 31 includes a pump motor 32 as a drive source and an impeller unit 33 driven by the pump motor 32. The pump motor 32 is mounted on a substrate 34 attached to the upper lid portion 40. The substrate 34 is a relatively thick and hard resin plate, and is fitted and attached to the central portion of the upper lid portion 40 so as to extend in the front-rear direction.

The drive shaft of the pump motor 32 extends below the substrate 34, and the impeller unit 33 is attached to the tip of the drive shaft.
The impeller unit 33 pumps up the drain water stored in the storage unit 24. The impeller unit 33 is installed at a position where it is immersed when a predetermined amount of drain water is stored in the storage unit 24. The impeller unit 33 has an impeller 33b mounted in the impeller casing 33a, and an opening (not shown) for sucking drain water is provided in the lower portion of the impeller casing 33a below the impeller 33b. The impeller casing 33a is formed in a disk shape, and a discharge port (not shown) is raised upward on the front upper surface and is connected to a discharge nozzle 33c (see FIG. 2) provided on the upper surface of the substrate 34. Has been done. As shown in FIG. 2, the discharge nozzle 33c is located in front of the motor cover 32a.

A first float switch 35 and a second float switch 36 are provided in the peripheral portion of the impeller unit 33 below the substrate 34.
The first float switch 35 is turned on when the water level in the storage portion 24 of the drain tank 21 exceeds a predetermined lower limit water level, and is turned off when the water level is below the lower limit water level. The second float switch 36 is turned on when the water level in the storage unit 24 exceeds a predetermined upper limit water level, and is turned off when the water level is below the upper limit water level. By the ON-OFF operation of the first float switch 35 and the second float switch 36, the drain pump device 31 is controlled to be ON-OFF while preventing the hunting operation of the drain pump device 31.

The pump motor 32 mounted on the upper surface of the substrate 34 is covered with a motor cover 32a. Slit holes 32b are formed on the left and right side surfaces and the back surface of the upper portion of the motor cover 32a to allow the flow of cooling air.

Behind the motor cover 32a on the upper surface of the substrate 34, a substrate or the like on which electronic components for controlling the pump motor 32 are mounted is attached. These boards and the like are covered with a component cover 37.

The upper lid portion 40 has a top surface covering the upper surface of the main body portion 20 and a hanging wall formed on the peripheral edge of the top surface, and is formed so as to cover the upper surface of the main body portion 20. Like the main body 20, the upper lid 40 has an inner wall 41 made of a steel plate, and the outer surface is covered with a heat insulating material 42 using this as a base material. The receiving portion 10 is placed on the left side of the upper lid portion 40. On the left side of the upper lid portion 40, three hole portions 43 are formed so as to project the three water drop ports 14 of the receiving portion 10 into the drain tank 21. A mounting portion having an opening 44 is formed in the central portion of the upper lid portion 40 so that the substrate 34 of the pump portion 30 is mounted in a fitting manner as described above. A viewing window 45 is formed on the right side of the upper lid portion 40 so that the inside of the preliminary storage portion 25 can be visually recognized.

Next, the operation of the first embodiment will be described.
A water pipe 12 is connected to the drain pump unit 1 of the first embodiment so as to receive and store drain water from a push-in type, duct-connected type ceiling-embedded air conditioner. When a push-in type, duct connection type ceiling-embedded air conditioner is operated, the drain water generated in the air conditioner is sent by the water pipe 12. The drain water that is sent is sent out under the high static pressure of the air blown from the indoor blower, and a part of the air blown from the indoor blower is mixed. Therefore, the drain water flowing in from the headrace 13 is in a state of being mixed with air having a large dynamic pressure, and flows vigorously into the receiving portion 10.

The drain water that has flowed into the receiving portion 10 from the water guide port collides with the colliding portion 15 and its momentum is weakened. The dynamic pressure of the inflowing air mixed with the drain water is converted into static pressure in the expansion chamber 11 of the receiving portion 10, and the wind speed is reduced. As a result, the drain water mixed with air is in a state where the flow velocity is weakened, and the water drops from the water drop port 14 to the water drop receiving portion 23 of the drain tank 21, and the water splashes when it falls to the water drop receiving portion 23. Is suppressed.

The drain water that has fallen is stored in the storage section 24 because the drop water receiving section 23 and the storage section 24 are integrally formed. Then, when the water surface in the storage unit 24 exceeds the predetermined upper limit water level of the second float switch 36 and the first float switch 35 and the second float switch 36 are turned on, the drain pump device 31 is driven. , Drain water is discharged from the discharge nozzle 33c. After that, the drain pump device 31 is ON-OFF controlled so as not to chatter by the ON-OFF operation of the first float switch 35 and the second float switch 36, and the drain water is discharged. When the storage unit 24 reaches an abnormal water level, a switch (not shown) for detecting the abnormality is activated to stop the operation of the air conditioner. Further, when the drain water overflows from the storage unit 24 for some reason, the drain water overflowing from the storage unit 24 is configured to be temporarily stored in the reserve storage unit 25.

Since the drain pump unit 1 according to the first embodiment is configured as described above, the following effects can be obtained.
(1-1) The flow velocity of the drain water flowing into the receiving portion 10 is weakened by the collision of the drain water at the collision portion 15. Further, the dynamic pressure of the air introduced into the receiving portion 10 together with the drain water is weakened by the expansion of the air in the expansion chamber 11. After the momentum is weakened, the flow velocity of the drain water and the wind speed of the air introduced into the receiving portion 10 are gently dropped into the drain tank 21 from the water falling port 14 whose passage area is expanded. As a result, the scattering of water droplets when the drain water falls into the drain tank 21 is suppressed.

(1-2) Since the collision portion 15 has a configuration using a wall surface forming the outer wall of the receiving portion 10, the configuration of the collision portion 15 and the configuration of the receiving portion 10 can be simplified.
(1-3) Since the waterfall port 14 is composed of a plurality of drain water waterfall openings, the position of the waterfall port 14 and the opening area of the waterfall port 14 are compared with the case where one waterfall port 14 is used. It is possible to improve the flexibility regarding the setting of.

(Second Embodiment)
Next, the drain pump unit 1 according to the second embodiment will be described with reference to FIGS. 5 and 6. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be simplified.

The drain pump unit 1 according to the second embodiment is a modification of the configuration of the receiving portion 10 in the first embodiment.
As shown in FIGS. 5 and 6, the drain pump unit 1 according to the second embodiment has one waterfall port 14 provided in the receiving portion 10, and the opening area thereof is larger than the opening area of the water guiding port 13. It is a thing. In this case, one waterfall port 14 is formed on the lower surface of the expansion chamber 11 as in the case of the first embodiment. As a result, the collision portion 15 is a wall portion forming the outer wall of the expansion chamber 11 facing the water guide port 13, and the drain water and air vigorously flowing from the water guide port 13 do not flow into the drain tank 21 as they are from the water drop port 14. I am trying to do it.

The drain pump unit 1 according to the second embodiment may have the same effects as the drain pump units 1 (1-1) and (1-2) according to the first embodiment, and may have the following effects. it can.

(2-1) Since the number of the waterfall port 14 is one, the configuration of the waterfall port 14 and, by extension, the configuration of the receiving portion 10 can be simplified.
(Third Embodiment)
Next, the drain pump unit 1 according to the third embodiment will be described with reference to FIG. 7. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be simplified.

The drain pump unit 1 according to the third embodiment is a modification of the configuration of the receiving portion 10 in the first embodiment.
As shown in FIG. 7, in the drain pump unit 1 according to the third embodiment, the water drop port 14 is avoided from the position facing the water guide port 13 on the wall surface forming the outer wall of the receiving portion 10 facing the water guide port 13. Two are formed. Further, in the drain pump unit 1 according to the third embodiment, the collision portion 15 is formed on the wall surface forming the outer wall of the receiving portion 10 facing the water guiding port 13 so as to face the water guiding port 13. In the case of such a configuration, it is not necessary to make the directions of the wall surface forming the water inlet 13 and the wall surface forming the water falling port 14 different, so that the expansion chamber 11 has a header shape to simplify the configuration.

The drain pump unit 1 according to the third embodiment has the same effects as the drain pump units 1 (1-1), (1-2), and (1-3) according to the first embodiment. The following effects can be achieved.

(3-1) Since both the collision portion 15 and the waterfall port 14 are formed on the wall surface constituting the outer wall of the receiving portion 10 facing the water guiding port 13, the receiving portion 10 should be miniaturized and simplified. Can be done.

(Fourth Embodiment)
Next, the drain pump unit 1 according to the fourth embodiment will be described with reference to FIG. The same parts as those in the second embodiment are designated by the same reference numerals, and the description thereof will be simplified.

The drain pump unit 1 according to the fourth embodiment is a modification of the configuration of the receiving portion 10 in the second embodiment.
As shown in FIG. 8, the drain pump unit 1 according to the fourth embodiment is obtained by changing the shape of the expansion chamber 11 and the shape of the waterfall port 14. The expansion chamber 11 has a substantially fan shape having a constant thickness, and a water guide port 13 is provided on the side surface of the fan shape. Then, as in the second embodiment, the collision portion 15 is a wall surface forming a fan-shaped outer wall portion facing the water guide port 13. Unlike the second embodiment, the waterfall port 14 has a quadrangular opening.

The drain pump unit 1 according to the fourth embodiment has the same effects as the drain pump units 1 (1-1), (1-2), and (2-1) according to the second embodiment. The following effects can be achieved.

(4-1) The shapes of the expansion chamber 11 and the waterfall port 14 are not the same as those of the first to third embodiments, but may have various shapes.
(Fifth Embodiment)
Next, the drain pump unit 1 according to the fifth embodiment will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be simplified.

The drain pump unit 1 according to the fifth embodiment is a modification of the configuration of the receiving portion 10 in the first embodiment.
As shown in FIG. 9, in the drain pump unit 1 according to the fifth embodiment, the expansion chamber 11 has a rectangular parallelepiped shape, and the water guide port 13 and the water drop port 14 are provided on an outer wall facing each other. In this case, the water inlet 13 is the upper surface and the water fall port 14 is the lower surface. An facing member 16 is provided so as to divide the expansion chamber 11 into two between the facing outer walls.

The facing member 16 may be any as long as it can adjust the passage resistance of the drain water mixed with air and can appropriately disperse the inflowing drain water. Such a constituent member is, for example, a plate material in which a large number of holes 16a are formed. The plate material may be made of steel plate or resin. The shape of the hole 16a may be an appropriate shape such as a round hole, a triangular hole, a diamond-shaped hole, a star-shaped hole, a linear slit hole, or a corrugated slit hole. The size, arrangement state, and number of the holes 16a are such that the passage resistance of the air flowing into the drain water is set to a predetermined level, and the drain water flowing into the expansion chamber 11 can be appropriately dispersed. However, it is not limited to a specific one.

With this configuration, the opposing member 16 forms a collision portion 15 that collides with the drain water to be conducted. This weakens the flow velocity of the drain water. Further, with respect to the air flowing in together with the drain water, the chamber in front of the facing member 16 becomes the first expansion chamber 11a, and the chamber on the rear side becomes the second expansion chamber 11b. As a result, the dynamic pressure of the air introduced from the headrace 13, that is, the wind speed can be weakened.

The drain pump unit 1 according to the fifth embodiment has the same effect as (1-1) and (1-3) of the drain pump unit 1 according to the first embodiment, and can also exert the following effects. ..

(5-1) By providing the facing member 16, the design restrictions on the water guide port 13 and the water drop port 14 are relaxed.
(5-2) By adjusting the passage resistance level of the drain water mixed with the air of the opposing member 16, it becomes easy to adjust the momentum of the drain water flowing into the drain tank 21.

(Sixth Embodiment)
Next, the drain pump unit 1 according to the sixth embodiment will be described with reference to FIGS. 10 and 11. The same parts as those in the fifth embodiment are designated by the same reference numerals, and the description thereof will be simplified.

The drain pump unit 1 according to the sixth embodiment is a modification of the facing member 16 in the fifth embodiment.
As shown in FIGS. 10 and 11, the drain pump unit 1 according to the sixth embodiment is obtained by reducing the size of the facing member 16 in the fifth embodiment. The facing member 16 in the sixth embodiment is a rectangular plate member located at the center of the cross section of the expansion chamber 11 facing the water guide port 13. The facing member 16 is fixed in the expansion chamber 11 by an appropriate means, and has a size such that a gap is provided between the outer circumference of the facing member 16 and the outer wall of the expansion chamber 11. The facing member 16 may be the same as in the case of the fifth embodiment.

With this configuration, the opposing member 16 forms a collision portion 15 that collides with the drain water to be conducted. This weakens the flow velocity of the drain water. Further, the expansion chamber 11 for the air flowing in together with the drain water is different from the fifth embodiment, and functions as one expansion chamber as in the case of the first to fourth embodiments, and the water guide port 13 The dynamic pressure of the air introduced from, that is, the wind speed can be weakened.

The drain pump unit 1 according to the sixth embodiment is the same as the drain pump unit 1 according to the fifth embodiment, according to the first embodiment (1-1) and (1-3), and the fifth embodiment. The same effects as in (5-1) and (5-2) can be obtained.

(Change example)
The description of each of the above embodiments is an example of the drain pump unit 1 according to the present disclosure, and is not intended to limit the embodiment. The drain pump unit 1 according to the present disclosure may take, for example, a form in which the modification examples of the above-described embodiments shown below and at least two modification examples that do not contradict each other are combined. In the following modification examples, the parts common to each of the above embodiments are designated by the same reference numerals as those of the above embodiments, and the description thereof will be omitted.

-In each embodiment, the number of waterfall ports 14 and the opening area of each waterfall port 14 can be arbitrarily set on the condition that the opening area of the waterfall port 14 is large at a predetermined ratio with respect to the opening area of the water guide port 13. Can be changed.

-As for the opening shape of the water falling port 14, various shapes can be taken provided that the opening area of the water falling port 14 is larger than the opening area of the water guiding port 13 at a predetermined ratio. For example, in the first embodiment, the shape of each waterfall port 14 may be changed to a quadrangle, an ellipse, an oval, a triangle, or the like.

-The shape of the expansion chamber 11 of the receiving portion 10 may also take various forms provided that the collision portion 15 is formed. For example, in the first embodiment and the second embodiment, the shape of the rectangular parallelepiped of the expansion chamber may have different proportions. Further, in the fifth embodiment and the sixth embodiment, instead of a rectangular parallelepiped, a spherical shape, a rugby ball shape, a cylindrical shape, or the like may be used.

-In each embodiment, the drain tank 21 is provided with a reserve storage unit 25, but this is not essential.
-In each embodiment, the drain tank 21 has a shape that allows the water fall receiving portion 23 and the storage portion 24 to be distinguished from each other, but such distinction is not essential and may be an integral shape. ..

-In each embodiment, the skeleton of the expansion chamber 11, the upper surface of the drain tank 21, and the substrate 34 on which the pump motor 32 is mounted are each formed of a hard resin plate member. However, these may be formed by a steel plate member.

Although the embodiments of the present disclosure have been described above, it will be understood that various modifications of the forms and details are possible without departing from the purpose and scope of the present disclosure described in the claims. ..

1 Drain pump unit 10 Receiving part 11 Expansion chamber 11a First expansion chamber 11b Second expansion chamber 12 Water guide pipe 13 Water inlet 14 Water fall port 15 Collision part 16 Opposing member 16a Hole 20 Main body 21 Drain tank 22 Main body case 22a Steel plate case 22b Insulation material 22c Mounting part 23 Falling water receiving part 24 Storage part 25 Spare storage part 26 Screw rod 27 Nut 30 Pump part 31 Drain pump device 32 Pump motor 32a Motor cover 32b Slit hole 33 Impeller unit 33a Impeller casing 33b Impeller 33c Discharge nozzle 34 Board 35 1st float switch 36 2nd float switch 37 Parts cover 40 Top lid 41 Inner wall 42 Insulation 43 Hole 44 Opening 45 Peeping window 101 Ceiling-embedded air conditioner 102 Ceiling 103 Suction port 104 Suction duct 105 Air outlet 106 Blow-out duct 107 Indoor blower 108 Indoor heat exchanger 109 Drain pan 110 Drain pump unit 111 Water guide pipe 112 Water guide 113 Drain tank 114 Drain pump 115 Drain pipe

Claims (5)

A receiving part (10) in which the indoor heat exchanger receives the drain water conducted from the air conditioner provided on the outlet side of the indoor blower, and
A drain tank (21) for storing drain water dropped from the receiving portion (10), and a drain tank (21).
Wherein an air conditioner for a drain pump units that have a the drain pump device (31) for draining drain water stored in the drain tank (21),
The receiving portion (10) includes a water guide port (13) for connecting a water guide pipe (12) for guiding drain water, and an expansion chamber (11) for expanding the air from the air conditioner that flows into the drain water. A collision portion (15) for colliding the drain water flowing in from the water guide port (13) and a water drop port (14) for causing the drain water colliding with the collision portion to fall into the drain tank (21).
The water drop port (14) is provided on the lower surface of the expansion chamber (11).
A drain pump unit for an air conditioner having an opening area of the water falling port (14) larger than the opening area of the water guiding port (13). The collision portion (15) is a wall surface forming an outer wall of the receiving portion (10) facing the water guide port (13).
The air conditioner drain pump according to claim 1, wherein the water drop port (14) is formed on a wall surface of the wall surface constituting the outer wall of the receiving portion (10) and which does not face the water guide port (13). unit. The water drop port (14) is formed on the wall surface forming the outer wall of the receiving portion (10) facing the water guide port (13), avoiding a position facing the water guide port (13).
The first aspect of claim 1, wherein the collision portion (15) is formed on a wall surface forming an outer wall of the receiving portion (10) facing the water guide port (13) so as to face the water guide port (13). Drain pump unit for air conditioners. The drain pump unit for an air conditioner according to claim 1, wherein the collision portion (15) is composed of an opposing member (16) provided in the receiving portion (10). The drain pump unit for an air conditioner according to any one of claims 1 to 4, wherein the water drop port (14) is composed of a plurality of openings for drain water fall.

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