CN217218745U - Coffee drinking machine - Google Patents

Abstract

The utility model discloses a coffee drinking machine, wherein a water storage barrel is connected with a cold liner through a normal temperature water inlet pipe, the bottom of the cold liner is connected with the bottom of a hot liner through a cold water outlet pipe, the front end of the upper part of a machine body is provided with a capsule coffee extraction device, the cold water outlet pipe comprises a first water outlet pipe and a second water outlet pipe, a three-way joint is arranged between the first water outlet pipe and the second water outlet pipe, the three-way joint is connected with a normal temperature water outlet pipe, and the water outlet end of the normal temperature water outlet pipe is connected with the water inlet end of the capsule coffee extraction device; the capsule coffee extracting device has the advantages that the capsule coffee extracting device is arranged at the front end of the upper part of the machine body, so that the utility model can provide coffee, cold water and hot water; the warm water obtained by mixing the cold water and the hot water is injected into the capsule coffee extraction device, the water temperature of the inlet water is high, the water temperature of the outlet coffee is stable, the heating speed of the coffee brewing water is improved, and the taste of the coffee is ensured; but also can ensure the normal operation of the electromagnetic pump in the capsule coffee extraction device and prolong the service life of the components.

Description

Coffee drinking machine

Technical Field

The utility model relates to the technical field of water dispensers, in particular to a coffee water dispenser.

Background

At present, a household water dispenser only has the function of providing drinking water, the function is single, and hot water produced by the water dispenser is not fully utilized, so that the waste of the using function of drinking water is caused.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a coffee water dispenser which can provide coffee and cold and hot water.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a coffee water dispenser comprises a machine body, wherein a cold liner, a hot liner and a water storage barrel are sequentially arranged from top to bottom of the machine body, the water storage barrel is connected with the cold liner through a normal-temperature water inlet pipe, the bottom of the cold liner is connected with the bottom of the hot liner through a cold water outlet pipe, a capsule coffee extraction device is arranged at the front end of the upper portion of the machine body, the cold water outlet pipe comprises a first water outlet pipe and a second water outlet pipe, a tee joint is arranged between the first water outlet pipe and the second water outlet pipe, a normal-temperature water outlet pipe is connected to the tee joint, and the water outlet end of the normal-temperature water outlet pipe is connected with the water inlet end of the capsule coffee extraction device.

Further, the capsule coffee extraction device comprises a mounting frame, a compressing mechanism, a gland mechanism, a bayonet and a drawer box for placing coffee capsules, wherein the drawer box is movably mounted below the mounting frame, the compressing mechanism comprises a handle, a rotating part and a sliding block, the rotating part comprises a connecting rod and rotating arms symmetrically fixed at two ends of the connecting rod, the sliding block is fixed at the bottom of the inner wall of the rotating arm, two sides of the mounting frame are symmetrically provided with support arms protruding upwards, the rotating arms are mounted on the support arms in a rotating mode through rotating shafts, the gland mechanism comprises an upper cover and a lower cover component embedded in the upper cover, the bayonet is mounted at the center of the lower cover component, the bayonet is located above the drawer box, and two corners of the upper cover are provided with connecting arms extending forwards, the antetheca of support arm on be provided with bellied mounting panel forward, the upper cover pass through the linking arm with the mounting panel articulated, the both sides lateral wall of upper cover on the symmetry be provided with the opening orientation the guide rail of support arm, the slider embedding the guide rail in, during the use, press down the handle, the drive the rotor arm drive the slider be in the guide rail internal motion, make the upper cover area move the bayonet knife move down and puncture the drawer box in coffee capsule.

In the structure, the front end of the upper cover is rotatably arranged on the mounting plate, and the sliding block is driven by the rotating arm to move from the front end of the upper cover to the center to press the upper cover downwards, so that the coffee capsule is punctured downwards by the puncturing knife, a better sealing effect can be achieved compared with vertical pressing, and the puncturing is more stable; by adopting the lever principle, the pressing force is small, and the puncturing effect is good.

Further, the upper cover on the symmetry be provided with the confession the rotor arm reciprocating motion's slide, the slide be located correspond one side of guide rail, the upper surface of slide be less than the lower bottom surface of guide rail, the end of the upper surface of slide be provided with an upwards bellied lug. In the structure, the slide way plays a role in guiding the rotating arm, and the convex block is arranged to be beneficial to the rotating arm to compress the upper gland so that the coffee capsule can be better punctured by the puncturing knife.

Furthermore, the lower cover component comprises a pressing block, a mounting ring and a sealing washer, the mounting ring is mounted at the bottom of the pressing block, the mounting ring and the bottom surface of the pressing block are matched to clamp the middle upper part of the sealing washer, the lower part of the sealing washer covers the mounting ring, the lower part of the sealing washer can be abutted against a coffee capsule, a base is embedded in the center of the pressing block, the base is provided with the bayonet, the bayonet comprises two symmetrically arranged blades, at least one ejection needle is arranged on the lower surface of the mounting ring, the ejection needle is located on the front side of the blades, the ejection needle is slightly lower than the blades, and the head of the ejection needle is arc-shaped. In the structure, the ejection needle is beneficial to separating the blade of the bayonet from the membrane of the coffee capsule, and can prevent the bayonet from pricking hands, thereby playing a role of safety protection.

Furthermore, the center of the drawer box is provided with a mounting cavity, the mounting cavity is movably provided with an extraction seat for placing coffee capsules, the mounting cavity is provided with a limiting ring protruding upwards, a water accumulation groove is formed between the limiting ring and the box wall of the drawer box, the limiting ring is lower than the box wall of the drawer box, the limiting ring is provided with a plurality of overflow ports at intervals in a surrounding mode, the overflow ports are communicated with the water accumulation groove and the mounting cavity, and a coffee outflow port is formed in the bottom of the mounting cavity. In the structure, too much water is fed, the water can be cached in the water accumulation tank, and hot air and accumulated water flow out through the coffee outflow port through the overflow port, so that the normal work of the coffee machine is ensured, and the service life is prolonged.

Furthermore, a water accumulation cavity which is sunken downwards is further arranged in the drawer box, the water accumulation cavity is located in front of the installation cavity, and the inner wall of the water accumulation cavity is lower than the front wall of the drawer box. In the structure, the water accumulation cavity is communicated with the water accumulation groove, when water inflow excessively flows into the water accumulation cavity, overflowing water in the water accumulation cavity can flow out along the coffee outlet through the water accumulation groove, the normal work of the outdoor unit is guaranteed, and the service life is prolonged.

Furthermore, the below symmetry of mounting bracket be provided with the installation spout of drawer box, the lower bottom surface of installation spout from inside to outside downward sloping be the V style of calligraphy. In this structure, the installation spout is the dovetail, and it is more even to compare in the horizontal plane atress, avoids the dislocation, guarantees the stationarity of drawer box, avoids the overflow, prolongs the life of drawer box.

Furthermore, the extraction bases are one or more. In the structure, only one pair of dies is needed to be opened for the drawer box, so that the universality of the drawer box is improved, and the production cost is reduced.

Furthermore, a plurality of limiting check rings are uniformly arranged at the bottom of the installation cavity in a surrounding mode at intervals, the limiting check rings and the bottom surface of the installation cavity are surrounded to form a clamping groove with an inward opening, a bayonet is arranged on the limiting check rings, the extraction seat comprises a bottom plate and a die sleeve with a cover, clamping blocks with positions and numbers corresponding to the bayonet are arranged at intervals on the outer ring of the bottom plate, the clamping blocks are embedded into the bayonet, and the bottom plate is rotated to be fixed in the clamping groove. In this structure, the fixture block embedding bayonet socket of bottom plate is rotatory the back bottom plate and is fixed in the draw-in groove, plays the effect of locking, and when changing or clearing up, rotating bottom plate can take out, and the convenience of taking is convenient for clear up.

Furthermore, an exhaust pipe is arranged at the top of the hot liner, and an air outlet of the exhaust pipe is connected with the top of the cold liner.

Further, the pipe diameter ratio of the first water outlet pipe to the second water outlet pipe is 10-12: 1. In the structure, the warm water flowing out of the first water outlet pipe is generally 12 ℃, the hot water flowing out of the second water outlet pipe is 90 ℃, the water temperature mixed to the electromagnetic pump according to the proportion is 20-22 ℃, the water heating time is shortened, the optimal taste of coffee is ensured, the service life of the electromagnetic pump is prolonged, the requirement on the electromagnetic pump is reduced, and the production cost can be reduced.

Furthermore, the capsule coffee extraction device also comprises an electromagnetic pump, a pressure release valve and a boiler which are arranged in the machine body, wherein a water inlet of the electromagnetic pump is connected with a water outlet end of the normal-temperature water outlet pipe, the electromagnetic pump is connected with the pressure release valve, the pressure release valve is respectively connected with the boiler and the cold liner, and the boiler boils water and then sends the boiled water into the gland mechanism.

Furthermore, a coffee tap, an upper wastewater receiving box, a cold water tap, a hot water tap and a lower wastewater receiving box are arranged on the front panel of the machine body from top to bottom, the coffee tap is connected with the water outlet end of the capsule coffee extraction device, the cold water tap and the hot water tap are arranged side by side, the cold water tap is connected with the water outlet end of the cold liner, the hot water tap is connected with the water outlet end of the hot water, a water leakage hole is formed in the bottom of the upper wastewater receiving box, a water leakage column is arranged on the water leakage hole, and the volume of the upper wastewater receiving box is smaller than that of the lower wastewater receiving box. In this structure, the water in the upper wastewater receiving box can be introduced into the lower wastewater receiving box by pressing the water leakage column.

Compared with the prior art, the utility model discloses a coffee water dispenser, because the upper portion front end of organism is provided with capsule coffee extraction device, it is thus visible the utility model discloses both can provide coffee and can provide cold water and hot water. The warm water obtained by mixing the cold water flowing out of the first water outlet pipe and the hot water flowing out of the second water outlet pipe is injected into the capsule coffee extraction device, the temperature of the inlet water is high, the temperature of the outlet coffee is stable, the heating speed of the coffee brewing water is improved, and the taste of the coffee is ensured; but also can ensure the normal operation of the electromagnetic pump in the capsule coffee extraction device and prolong the service life of the components.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a waterway diagram of the present invention;

FIG. 4 is a schematic structural view of the capsule coffee extracting apparatus of the present invention;

FIG. 5 is an exploded view of the capsule coffee extracting apparatus of the present invention;

FIG. 6 is a schematic view of the internal structure of the capsule coffee extracting apparatus of the present invention;

fig. 7 is a schematic view of the internal structure of the capping mechanism of the present invention;

fig. 8 is a schematic structural view of the drawer box of the present invention;

fig. 9 is a schematic structural view of the extraction cup with a cover of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows: as shown in fig. 1-6, a coffee water dispenser comprises a machine body 1, the machine body 1 is sequentially provided with a cold container 2, a hot container 3 and a water storage barrel 4 from top to bottom, the water storage barrel 4 is connected with the cold container 2 through a normal temperature water inlet pipe 5, the bottom of the cold container 2 is connected with the bottom of the hot container 3 through a cold water outlet pipe, the front end of the upper part of the machine body 1 is provided with a capsule coffee extraction device, the cold water outlet pipe comprises a first water outlet pipe 6 and a second water outlet pipe 7, a three-way joint 8 is arranged between the first water outlet pipe 6 and the second water outlet pipe 7, the three-way joint 8 is connected with a normal temperature water outlet pipe 9, and the water outlet end of the normal temperature water outlet pipe 9 is connected with the water inlet end of the capsule coffee extraction device. The capsule coffee extraction device comprises a mounting frame 10, a pressing mechanism, a gland mechanism, a bayonet 11 and a drawer box 12 for placing coffee capsules, wherein the drawer box 12 is movably mounted below the mounting frame 10, the pressing mechanism comprises a handle 13, a rotating part and a sliding block 14, the rotating part comprises a connecting rod 15 and rotating arms 16 symmetrically fixed at two ends of the connecting rod 15, the sliding block 14 is fixed at the bottom of the inner wall of the rotating arm 16, upward-protruding support arms 17 are symmetrically arranged at two sides of the mounting frame 10, the rotating arms 16 are rotatably mounted on the support arms 17 through rotating shafts 18, the gland mechanism comprises an upper cover 19 and a lower cover component embedded in the upper cover 19, the bayonet 11 is mounted at the center of the lower cover component, the bayonet 11 is positioned above the drawer box 12, forward-extending connecting arms 20 are arranged at two corners of the upper cover 19, a forward-protruding mounting plate 21 is arranged on the front wall of the support arms 17, the upper cover 19 is hinged with the mounting plate 21 through the connecting arms 20, the lateral walls of the two sides of the upper cover 19 are symmetrically provided with guide rails 22 with openings facing the support arms 17, the sliding block 14 is embedded into the guide rails 22, the upper cover 19 is symmetrically provided with slide ways 23 for the rotating arms 16 to reciprocate, the slide ways 23 are positioned on one side of the corresponding guide rails 22, the upper surfaces of the slide ways 23 are lower than the lower bottom surfaces of the guide rails 22, and the tail ends of the upper surfaces of the slide ways 23 are provided with a convex block 24 protruding upwards.

In this embodiment, as shown in fig. 7, the lower cover assembly includes a pressing block 25, a mounting ring 26 and a sealing gasket 27, the mounting ring 26 is mounted at the bottom of the pressing block 25, the mounting ring 26 cooperates with the bottom surface of the pressing block 25 to clamp the middle upper portion of the sealing gasket 27, the lower portion of the sealing gasket 27 covers the mounting ring 26, the lower portion of the sealing gasket 27 can abut against the coffee capsule, a base 28 is embedded in the center of the pressing block 25, a bayonet 11 is disposed on the base 28, the bayonet 11 includes two symmetrically disposed blades 111, at least one ejection pin 29 is disposed on the lower surface of the mounting ring 26, the ejection pin 29 is located at the front side of the blade 111, the ejection pin 29 is slightly lower than the blade 111, and the head of the ejection pin 29 is arc-shaped. In this configuration, the ejection pin 29 facilitates the separation of the blade 111 of the bayonet 11 from the membrane of the coffee capsule, and also prevents the bayonet 11 from pricking the hand, serving as a safety guard.

In the second embodiment, the other structures are the same as those in the first embodiment, and the difference is that: as shown in fig. 8, a mounting cavity 30 is provided in the center of the drawer box 12, the mounting cavity 30 is movably provided with an extraction seat 31 for placing coffee capsules, a limiting ring 32 protruding upwards is provided on the mounting cavity 30, a water collecting groove 33 is provided between the limiting ring 32 and the box wall of the drawer box 12, the limiting ring 32 is lower than the box wall of the drawer box 12, a plurality of overflow openings 34 are provided on the limiting ring 32 at intervals in a surrounding manner, the overflow openings 34 communicate the water collecting groove 33 with the mounting cavity 30, and a coffee outflow opening 35 is provided at the bottom of the mounting cavity 30. In the structure, too much water is fed in and can be buffered in the water accumulation tank 33, and hot air and accumulated water flow out through the overflow port 34 and the coffee outflow port 35, so that the normal operation of the coffee maker is ensured, and the service life is prolonged. A water accumulating cavity 36 which is concave downwards is further arranged in the drawer box 12, the water accumulating cavity 36 is located in front of the installation cavity 30, and the inner wall of the water accumulating cavity 36 is lower than the front wall of the drawer box 12. In the structure, the water accumulation cavity 36 is communicated with the water accumulation groove 33, when the inflow water excessively flows into the water accumulation cavity 36, the overflow water in the water accumulation cavity 36 can flow out along the coffee outlet through the water accumulation groove 33, so that the normal work of the outdoor unit is ensured, and the service life is prolonged.

In the third embodiment, the other structures are the same as those of the second embodiment, and the differences are as follows: the mounting chutes 37 of the drawer box 12 are symmetrically arranged below the mounting frame 10, and the lower bottom surfaces of the mounting chutes 37 are in a V shape inclining downwards from inside to outside. In this structure, the mounting chute 37 is dovetail-shaped, and is more uniformly stressed compared with a horizontal plane, thereby avoiding dislocation, ensuring the stability of the drawer box 12, avoiding overflow, and prolonging the service life of the drawer box 12.

The fourth embodiment is the same as the third embodiment in other structures, and the difference is that: as shown in fig. 9, the extraction seat 31 is one or more, including uncovered extraction seat, the area lid extract seat and coffee powder extraction seat, different extraction seats 31 are used for the different capsules of adaptation, and the seat 31 is extracted to many styles more than the same installation cavity 30 adaptation of this application, and drawer box 12 only need open a pair mould, has improved drawer box 12's commonality, reduction in production cost. The bottom of the installation cavity 30 is uniformly provided with a plurality of limiting check rings 38 at intervals in a surrounding manner, the limiting check rings 38 and the bottom surface of the installation cavity 30 are surrounded to form a clamping groove 39 with an inward opening, a bayonet 40 is arranged on the limiting check rings 38, one of the extraction bases 31 comprises a bottom plate 41 and a die sleeve 42 with a cover, clamping blocks 43 with positions and numbers corresponding to the bayonet 40 are arranged on the outer ring of the bottom plate 41 at intervals, the clamping blocks 43 are embedded into the bayonet 40, and the bottom plate 41 is rotated to be fixed in the clamping groove 39. In this structure, the fixture block 43 of the bottom plate 41 is embedded into the bayonet 40, and the bottom plate 41 is fixed in the fixture groove 39 after rotation, so that the locking effect is achieved, and when the rotary bottom plate 41 is replaced or cleaned, the rotary bottom plate 41 can be taken out, is convenient to take and is convenient to clean.

In the fifth embodiment, the other structures are the same as those in the fourth embodiment, and the difference is that: the top of the hot liner 3 is provided with an exhaust pipe 44, and the air outlet of the exhaust pipe 44 is connected with the top of the cold liner 2. The pipe diameter ratio of the first water outlet pipe 6 to the second water outlet pipe 7 is 10-12: 1. In the structure, the warm water flowing out of the first water outlet pipe 6 is generally 12 ℃, the hot water flowing out of the second water outlet pipe 7 is 90 ℃, the water temperature mixed to the electromagnetic pump 45 according to the proportion is 20-22 ℃, the water heating time is shortened, the optimal taste of coffee is ensured, the service life of the electromagnetic pump 45 is prolonged, the requirement on the electromagnetic pump 45 is reduced, and the production cost can be reduced.

In this embodiment, the capsule coffee extracting apparatus further includes an electromagnetic pump 45, a pressure release valve 46 and a boiler 47 which are arranged in the machine body 1, a water inlet of the electromagnetic pump 45 is connected with a water outlet end of the normal temperature water outlet pipe 9, the electromagnetic pump 45 is connected with the pressure release valve 46, the pressure release valve 46 is respectively connected with the boiler 47 and the cold bladder 2, and the boiler 47 boils water and then sends the water into the capping mechanism.

In this embodiment, a coffee tap 48, an upper waste water receiving box 49, a cold water tap 50, a hot water tap 51 and a lower waste water receiving box 52 are arranged on the front panel of the machine body 1 from top to bottom, the coffee tap 48 is connected with the water outlet end of the capsule coffee extraction device, the cold water tap 50 and the hot water tap 51 are arranged side by side, the cold water tap 50 is connected with the water outlet end of the cold bladder 2, the hot water tap 51 is connected with the water outlet end of the hot bladder 3, the bottom of the upper waste water receiving box 49 is provided with a water leakage hole, a water leakage column 53 is arranged on the water leakage hole, and the volume of the upper waste water receiving box 49 is smaller than that of the lower waste water receiving box 52. In this configuration, pressing leak column 53 directs water from upper waste receptacle 49 into lower waste receptacle 52.

Claims (9)

1. A coffee water dispenser comprises a dispenser body, wherein a cold liner, a hot liner and a water storage barrel are sequentially arranged from top to bottom of the dispenser body, the water storage barrel is connected with the cold liner through a normal-temperature water inlet pipe, the bottom of the cold liner is connected with the bottom of the hot liner through a cold water outlet pipe, the coffee water dispenser is characterized in that a capsule coffee extraction device is arranged at the front end of the upper portion of the dispenser body, the cold water outlet pipe comprises a first water outlet pipe and a second water outlet pipe, a three-way joint is arranged between the first water outlet pipe and the second water outlet pipe, a normal-temperature water outlet pipe is connected onto the three-way joint, and the water outlet end of the normal-temperature water outlet pipe is connected with the water inlet end of the capsule coffee extraction device.

2. The coffee drinking machine of claim 1, characterized in that the capsule coffee extraction device comprises a mounting rack, a hold-down mechanism, a capping mechanism, a bayonet and a drawer box for placing coffee capsules, the drawer box is movably mounted below the mounting rack, the hold-down mechanism comprises a handle, a rotating part and a slider, the rotating part comprises a connecting rod and rotating arms symmetrically fixed at two ends of the connecting rod, the slider is fixed at the bottom of the inner wall of the rotating arm, upwardly protruding support arms are symmetrically arranged at two sides of the mounting rack, the rotating arms are rotatably mounted on the support arms through rotating shafts, the capping mechanism comprises an upper cover and a lower cover component embedded in the upper cover, the bayonet is mounted at the center of the lower cover component, and the bayonet is located above the drawer box, two angles of upper cover on be provided with the linking arm that extends forward, the antetheca of support arm on be provided with bellied mounting panel forward, the upper cover pass through the linking arm with the mounting panel articulated, the both sides lateral wall of upper cover on the symmetry be provided with the opening orientation the guide rail of support arm, the slider embedding the guide rail in, during the use, press down the handle, the drive the rotor arm drive the slider be in the guide rail internal motion, make the upper cover area move the bayonet knife move down puncture the coffee capsule in the drawer box.

3. The coffee water dispenser of claim 2, characterized in that the lower cover assembly comprises a pressing block, a mounting ring and a sealing washer, the mounting ring is mounted at the bottom of the pressing block, the mounting ring and the bottom surface of the pressing block are matched to clamp the middle upper part of the sealing washer, the lower part of the sealing washer covers the mounting ring, the lower part of the sealing washer can abut against a coffee capsule, a base is embedded in the center of the pressing block, the base is provided with the bayonet, the bayonet comprises two symmetrically arranged blades, at least one ejection needle is arranged on the lower surface of the mounting ring, the ejection needle is positioned at the front side of the blades, the ejection needle is slightly lower than the blades, and the head of the ejection needle is arc-shaped.

4. The coffee water dispenser as claimed in claim 2, wherein the drawer box has a mounting cavity at the center, the mounting cavity is movably provided with an extraction seat for placing coffee capsules, the mounting cavity is provided with a limiting ring protruding upwards, a water collecting tank is arranged between the limiting ring and the box wall of the drawer box, the limiting ring is lower than the box wall of the drawer box, the limiting ring is provided with a plurality of overflow ports at intervals, the overflow ports are communicated with the water collecting tank and the mounting cavity, and a coffee outflow port is arranged at the bottom of the mounting cavity.

5. The coffee water dispenser of claim 4, characterized in that a water accumulation cavity which is concave downwards is further arranged in the drawer box, the water accumulation cavity is positioned in front of the mounting cavity, and the inner wall of the water accumulation cavity is lower than the front wall of the drawer box.

6. The coffee water dispenser of claim 1 is characterized in that the top of the hot liner is provided with an exhaust pipe, and the air outlet of the exhaust pipe is connected with the top of the cold liner.

7. The coffee water dispenser of claim 1, wherein the pipe diameter ratio of the first water outlet pipe to the second water outlet pipe is 10-12: 1.

8. The coffee water dispenser of claim 2, characterized in that the capsule coffee extraction device further comprises an electromagnetic pump, a pressure release valve and a boiler arranged in the machine body, wherein a water inlet of the electromagnetic pump is connected with a water outlet end of the normal temperature water outlet pipe, the electromagnetic pump is connected with the pressure release valve, the pressure release valve is respectively connected with the boiler and the cold bladder, and the boiler boils water and sends the boiled water into the pressure cover mechanism.

9. The coffee drinking machine of claim 1, wherein the front panel of the machine body is provided with a coffee tap, an upper waste water receiving box, a cold water tap, a hot water tap and a lower waste water receiving box from top to bottom, the coffee tap is connected with the water outlet end of the capsule coffee extraction device, the cold water tap and the hot water tap are arranged side by side, the cold water tap is connected with the water outlet end of the cold bladder, the hot water tap is connected with the water outlet end of the hot water, the bottom of the upper waste water receiving box is provided with water leakage holes, the water leakage holes are provided with water leakage columns, and the volume of the upper waste water receiving box is smaller than that of the lower waste water receiving box.

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