JP3568281B2 - washing machine - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a washing machine having an improved hot water supply structure.
[0002]
[Prior art]
For example, a general hot water supply structure for a large dishwasher for business use or the like is disclosed in detail in Japanese Patent Application Laid-Open No. 6-30873. In other words, this type of dishwasher has a washing tank in which a shallow water receiver is formed on one side to form a deep water reservoir, and hot water is supplied from an external water heater to the water reservoir of the washing tank together with the detergent. They are supplied and stored. The stored washing liquid is sprayed onto the dishes in the washing room by the washing pump to remove the dirt.At this time, the washing liquid that has been washed off from the dishes is received by the water receiving section of the washing tank and filtered by the filter, and is then filtered. It returns and is circulated again by the washing pump, and this is repeated to wash the dishes.
After washing the dishes as described above, a relatively high-temperature rinse water is previously stored in a hot water storage tank provided separately from the washing tank from a water heater outside the machine, and the rinse water in the washing room is rinsed with a rinse pump. The cleaning liquid is sprayed onto the tableware, and the cleaning liquid adhering to the tableware is drained off by this, and is drained from the water reservoir of the cleaning tank through, for example, an overflow pipe.
[0003]
In this type of dishwasher, the hot water storage tank is generally arranged separately from the main body, connected to a pipe, or arranged in a portion of the inside of the main body box adjacent to the cleaning tank. Met.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional washing machine, despite that hot water having a relatively high temperature is both stored, the washing tank and the hot water storage tank are separately provided and the heat radiation area is wide, so that the thermal efficiency is sufficiently high. There was a problem that it could not be raised.
The present invention has been devised in view of the above circumstances. An object of the present invention is to provide a washing machine capable of increasing thermal efficiency.
[0005]
[Means for Solving the Problems]
The invention of claim 1 isIn a washing machine having a washing tank in a main body box and performing a washing operation while storing hot water obtained by washing an object to be washed in the main body box in the washing tank, a hot water storage tank for storing hot water for use in the washing operationBut,In the washing tankIt is configured to be arranged in a form submerged in the water stored in this washing tankHowever, it has features.
According to a second aspect of the present invention, there is provided a washing machine that includes a washing tank in a main body box, and performs a washing operation while storing hot water that has washed an object to be washed in the main body box in the washing tank. A hot water storage tank for storing hot water is disposed in the cleaning tank, and a water receiving tank having a cistern structure for receiving water from a water source side is provided outside the cleaning tank, and the water receiving tank is provided with the hot water storage tank. The hot water storage tank is further provided with a steam vent pipe for discharging steam inside the hot water storage tank to the water receiving tank.
A third aspect of the present invention is characterized in that, in the second aspect, the water receiving tank is provided at a position higher than the hot water storage tank.
[0006]
[Action]
According to the first aspect of the present invention, since the hot water storage tank is disposed in the cleaning tank, the cleaning liquid in the cleaning tank and the hot water in the hot water storage tank have a close thermal relationship, and the temperature is lower from higher. The heat moves toward you. For example, if the temperature of the hot water in the hot water storage tank is higher than the temperature of the cleaning liquid, the heat is not dissipated into the air from the surface of the hot water storage tank but is used to warm the cleaning liquid. Conversely, if the temperature of the cleaning liquid is high, the heat passes through the wall surface of the hot water storage tank and is transmitted to the internal hot water, thereby preheating the hot water, so that the heat is effectively used.
According to the second aspect of the invention, the water from the tap water can be received by the water receiving tank having the cistern structure, so that the backflow of the water from the hot water storage tank to the water source can be reliably prevented. Also, if the hot water storage tank is provided with a cistern structure, the size of the hot water storage tank is increased, and accordingly, the washing machine is increased in size, and the effective bottom area in the cleaning tank is reduced, and the water level changes drastically. Although there is a possibility that the water receiving tank is provided separately from the washing tank in the second aspect of the present invention, the size of the washing machine is increased, and the water level change becomes excessively large, so that air is sucked from the suction port during the operation of the pump. Such a situation can be prevented.
In addition, the steam from the hot water storage tank flows through the steam drain pipe into the water receiving tank, which is effectively used to warm the water in the water receiving tank. The amount of emissions to the plant is small.
[0007]
Further, in the invention of claim 3, since the water receiving tank is located higher than the hot water storage tank, the water in the water receiving tank naturally flows into the hot water storage tank..
[0008]
【The invention's effect】
As described above, according to the washing machine of the present invention, the following effects can be obtained. According to the first aspect of the present invention, since the hot water storage tank is disposed in the cleaning tank, the cleaning liquid in the cleaning tank and the hot water in the hot water storage tank are in a thermally close relationship, thereby eliminating waste and increasing thermal efficiency. . According to the invention of claim 2, backflow of water from the hot water storage tank to the water source side can be reliably prevented, and there is no danger of air clogging during pump operation.In addition, the water in the water receiving tank can be preheated by the steam from the hot water storage tank, so that the thermal efficiency is further increased.According to the invention of claim 3, since the water in the water receiving tank naturally flows into the hot water storage tank, the water supply pump and the like can be omitted.You.
[0009]
【Example】
Hereinafter, an embodiment in which the present invention is embodied as a large-scale dishwasher for business use will be described with reference to FIGS. 1 to 16.
<Configuration of Example>
First, the overall structure of the cleaning machine will be described with reference to FIGS. In the washing machine of the present embodiment, a washing tank 2 is arranged in the lower portion of the inside of the main body box 1, and a washing chamber 3 is located above the washing tank 2. A large opening 4 is formed on the front surface of the main body box 1 so as to be continuous with the cleaning chamber 3. A lower door 5 is provided at the lower edge of the opening 4 and rotates toward the front. It is opened and closed in cooperation with the upper door 6 which moves up and down along the side edge. The upper door 6 and the lower door 5 are connected to each other via a link mechanism (not shown), and when the user opens the handle 7 provided on the lower door 5 to the front, the upper door 6 interlocks therewith. When the lower door 5 is closed, the upper door 6 is lowered and fully closed by ascending. With the opening and closing of the doors 5, 6, the object A to be cleaned is placed on the rack 8 and is put in and out of the cleaning room 3.
[0010]
The cleaning tank 2 has a shallow rectangular dish-shaped liquid receiving portion 10 forming the bottom of the cleaning chamber 3, and a deep-bottomed water storage portion 11 formed on one side (right side in the figure) of the liquid receiving portion 10. Consists of Near the ceiling of the cleaning chamber 3 and near the liquid receiving section 10 of the cleaning tank 2, a cleaning nozzle 12 and a rinsing nozzle 13 are provided so as to be freely rotatable using the reaction force of the jet. When the cleaning object A is stored in the cleaning chamber 12, first, warm cleaning liquid is jetted from the upper and lower cleaning nozzles 12 into the cleaning chamber 3 to wash away the dirt attached to the cleaning object A. Subsequently, the upper and lower rinsing nozzles 13 The heated cleaning water is blown out from the cleaning tank to wash away the attached cleaning liquid, and the cleaning is performed. The dirt and the cleaning liquid are received by the liquid receiving section 10 of the cleaning tank 2 and the primary filter provided on the bottom surface on the right side thereof. The water flows into the water storage section 11 through 14.
[0011]
As shown in FIG. 5, a drain port body 15 is fixed to the bottom of the water storage section 11 of the cleaning tank 2 with a bolt 16. A guide tube 17 is fixed in the water storage portion 11 in a vertically extended state by a mounting frame 18, and an overflow pipe 19 is inserted therein and guided to be vertically movable. A drain valve 20 is fitted to the lower end of the overflow pipe 19, and is inserted into the drain port body 15 as shown in FIG. By pulling the drain valve 20 upward and pulling out the drain valve 20 from the drain port body 15, the drain port body 15 is opened to be in a drain state.
[0012]
The overflow pipe 19 has a double cylindrical shape composed of an inner cylinder 21 and an outer cylinder 22, as shown in detail in FIG. 13, and a handle 23 having a hook 23a at an upper end is fixed horizontally. Accordingly, the entire overflow pipe 19 can be pulled upward by gripping the handle 23. In order to maintain the overflow pipe 19 in a drained state in which the overflow pipe 19 is pulled up, an engagement hole 25 is formed in the mounting frame 24 of the primary filter 14 located at the upper edge of the opening of the cleaning tank 2 (see FIG. 12). A hook 23a provided on the handle 23 of the pipe 19 can be hooked.
[0013]
13 and 14, the upper end of the inner cylinder 21 is closed by an end plate 21a, and a total of four overflow holes 26 are formed in the peripheral wall near the upper end at equal angular intervals. When the water level in the second water storage section 11 exceeds the lower edge of the overflow hole 26, the water overflows through the overflow hole 26. As shown in detail in FIG. 14, an annular baffle plate 27 is fitted to the inner cylinder 21 above the overflow hole 26. In particular, in the present embodiment, the annular baffle plate 27 is set to have an inner diameter of the outer cylinder 22 of 48 mm, an outer diameter of the inner cylinder 21 of 28 mm, and an outer diameter of 40 mm.
[0014]
On the other hand, a cleaning pump 28 is attached to a lower part of the liquid receiving part 10 of the cleaning tank 2 so as to be located at a depth side of the water storage part 11 (see FIG. 2). The suction side of the cleaning pump 28 is connected to the side wall of the water reservoir 11 of the cleaning tank 2, and the discharge side extends to near the ceiling of the cleaning chamber 3 through the cleaning tank 2 and is connected to the cleaning nozzle 12. It is connected to a pipe 29. Then, in the water storage section 11 of the cleaning tank 2, a secondary filter 30 is accommodated so as to be able to be taken out upward corresponding to a suction port to the cleaning pump 28, and the cleaning liquid in the water storage section 11 is passed through the secondary filter 30. The suction is performed by the cleaning pump 28 and supplied to the cleaning nozzle 12 through the liquid supply pipe 29.
[0015]
Now, the structure for supplying hot water to the washing tank 2 will be described in detail. In this washing machine, a water receiving tank 40 for receiving water from a water heater, for example, an instantaneous water heater, and a water receiving tank 40 for receiving water from the water receiving tank 40 are provided. And a hot water storage tank 50 for heating.
The water receiving tank 40 is located above the cleaning pump 28, and is provided below the liquid receiving portion 10 of the cleaning tank 2 and at the corner of the main body box 1 as shown in FIG. The specific structure is shown in FIGS. 8 and 9, and includes a cistern structure in which an electromagnetic water supply valve 42 is attached to the outer wall of a rectangular tank body 41 and a float switch 43 is attached inside. Water is prevented from flowing backward from inside the tank body 41 to the water supply valve 42 side. A water supply pipe (not shown) from, for example, an instantaneous water heater is connected to the water supply valve 42, and a float switch 43 moves up and down according to the level of water stored in the tank body 41, and a switch (not shown) operates. When the water level falls below a predetermined level, the water supply valve 42 is opened to supply water, and when the water level reaches a predetermined level, the water supply valve 42 is closed to stop water supply. The water outlet 42a of the water supply valve 42 is provided near the uppermost portion of the tank body 41, and the float 43a of the float switch 43 is located at an intermediate height of the tank body 41. A large distance between 42a and the set water level in the tank body 41 can be ensured. An outflow pipe 44 from the tank body 41 is provided on a side wall near the bottom of the tank body 41, and is connected to the hot water storage tank 50 via a connection hose 45 (see FIG. 11) connected thereto. In addition, an overflow pipe 46 for preventing the inside of the tank main body 41 from exceeding a set water level is provided on a side wall portion of the tank main body 41, and a drain pipe 47 is provided on a bottom surface portion.
[0016]
Next, the hot water storage tank 50 is as shown in FIGS. 10 and 11, and also includes a rectangular tank main body 51. The tank main body 51 has a flange portion 52 on a side surface portion, and is a hermetic type that is inserted into the water storage portion 11 from an opening formed in a side wall portion of the water storage portion 11 of the cleaning tank 2 and is fixed by screwing at the flange portion 52. Thus, the water storage unit 11 is submerged in the water. A spiral heater 54 is attached to an end plate 53 that is attached to the flange portion 52 and closes the tank body 51 so that water in the tank body 51 can be heated. A water supply pipe 55 protrudes from an upper portion of the end plate 53, and a connection hose 45 of the water receiving tank 40 is inserted into the water supply pipe 55 so that water can be supplied from the water receiving tank 40. An outlet pipe 44 protrudes from the lower part of the housing, and the suction side of a rinse pump 56 is connected to the outlet pipe 44. The discharge side of the rinsing pump 56 is connected to the rinsing nozzle 13 described above. By operating the rinsing pump 56, hot water in the hot water storage tank 50 can be supplied from the rinsing nozzle 13 into the cleaning chamber 3. The water supply pipe 55 of the hot water storage tank 50 is provided at a position which is substantially at the same level as the outflow pipe 44 of the water receiving tank 40. A steam vent pipe 57 is projected from the top of the end plate 53, and a steam vent hose 58 connected to the steam vent pipe 57 is connected to a communication pipe 48 provided in the tank body 41 of the water receiving tank 40. Thus, the steam generated in the hot water storage tank 50 is sent into the water receiving tank 40 by connecting the inside of the hot water storage tank 50 with the inside of the water receiving tank 40. After the steam sent into the water receiving tank 40 is filled in the water receiving tank 40, the steam is discharged outside the machine through an overflow pipe 46 provided therein.
[0017]
In addition, steam vent ducts 60 are provided at two places on the left and right sides of the ceiling of the cleaning room 3 as shown in FIGS. This is configured as a vertically split two-piece type of a rectangular vent box main body 61 opened up and down and a water shielding cover 63, and a filter 62 is attached to the upper opening of the vent box main body 61. A pair of mounting tongue pieces 63a and 63b are formed at two opposing positions on the upper edge of the water-impervious cover 63 so as to extend in one direction along the longitudinal direction, and these are formed at the lower edge of the ventilation box main body 61. 61a, 61b. A downwardly extending piece 61c is formed downward at the lower edge of the ventilation box main body 61. The hanging piece 61c and the side wall 63a of the impermeable cover 63 are overlapped with each other, and both are detachably attached with screws 64. The screw 64 is provided at a position where it can be removed from the inside of the cleaning chamber 3, and the water-impermeable cover 63 can be removed inside the cleaning chamber 3 by removing the screw 64. As shown in FIG. 15, the water-impervious cover 63 has a water-impervious inclined wall 63 d that is inclined from the lower end of the side wall 63 c farther from the side wall of the cleaning chamber 3 so as to approach the side wall of the cleaning chamber 3. It is formed so that a narrow ventilation gap g is left between its tip and the inner peripheral surface of the cleaning chamber 3, and a narrow ventilation slit s is also formed between the other side wall 64e. I have.
[0018]
The steam vent duct 60 penetrates through the insertion opening 1b formed in the ceiling wall 1a of the main body box 1 and the insertion opening 65a of the ceiling lid 65 attached to the lower surface of the ceiling wall 1a, from above the main body box 1. The screw 64 is inserted in the cleaning chamber 3.
As shown in FIG. 15, the central part of the ceiling lid 65 is fixed to the ceiling wall 1 a, and the left and right sides of the cleaning chamber 3 are inclined downward and inclined so that both ends are on the left and right sides of the main body box 1. It is fixed to the wall 1c. As a result, the ceiling portion of the main body box 1 is reinforced, and the left and right sides of the ceiling portion of the cleaning chamber 3 are inclined downward, so that the cleaning liquid and the rinsing water injected in the cleaning chamber 3 can smoothly move to the ceiling. Water spills out of the section, reducing water retention.
In FIG. 3, reference numeral 100 denotes a control box containing control circuits for various electric components, and reference numeral 101 denotes an operation box.
<Operation of Embodiment>
In the above configuration, when the power supply switch is turned on and the cleaning operation is started in a state where the water supply hose of the instantaneous water heater is connected to the water supply valve 42 of the water reception tank 40, first, the water supply process is started, and the water supply process is started. Tap water is supplied until the water supply valve 42 of the tank 40 opens and the inside of the tank main body 41 of the water receiving tank 40 reaches the set water level. Here, the water receiving tank 40 and the hot water storage tank 50 are communicated with each other by a connecting hose 45, and the inside of the hot water storage tank 50 passes through the steam vent pipe 57, the inside of the water receiving tank 40, and its overflow pipe 46 in order to open air. Therefore, the tap water supplied from the water supply valve 42 to the water receiving tank 40 also flows into the hot water storage tank 50 to fill it.
[0019]
When such a water supply process is completed, the rinsing pump 56 is operated for a predetermined time to supply tap water in the hot water storage tank 50 from the rinsing nozzle 13 into the cleaning chamber 3, which flows into the cleaning tank 2 and is stored in the water storage unit 11. Is done. If the water in the hot water storage tank 50 is discharged, the water level in the water receiving tank 40 will decrease in conjunction therewith, so that the float switch 43 of the water receiving tank 40 operates and the water supply valve 42 opens, Tap water is added so that the set water level is always maintained. The tap water flowing into the cleaning tank 2 is mixed with a detergent to become cleaning water.
Next, the washing pump 28 is operated to execute the washing process, thereby washing the dishes. That is, the cleaning liquid in the water storage section 11 of the cleaning tank 2 is sucked by the cleaning pump 28 and is jetted to the tableware from the cleaning nozzles 12 located above and below the cleaning chamber 3. At this time, while the solids washed out of the tableware are collected by the primary filter 14 on the upper surface of the washing tank 2, the cleaning liquid is circulated and is sprayed on the tableware. During the execution of the cleaning process, the heater 54 of the hot water storage tank 50 is energized, and the water in the hot water storage tank 50 is heated until the hot water temperature reaches a set temperature of, for example, about 80 degrees. At this time, the air in the hot water storage tank 50 expands greatly, but this air escapes to the water receiving tank 40 side through the steam vent pipe 57, so that there is no excessive pressure increase in the hot water storage tank 50. Further, since the hot air and steam generated in the hot water storage tank 50 once flow into the water receiving tank 40 through the steam release pipe 57 as described above, the low-temperature water in the water receiving tank 40 is preheated.
[0020]
Then, when the cleaning process is performed for a predetermined time, the process proceeds to the rinsing process, and the rinsing pump 56 is operated for a predetermined time instead of the cleaning pump 28. Then, the high-temperature hot water stored in the hot water storage tank 50 is sprayed from the rinsing nozzle 13 to the dishes in the washing room 3, and the dishes are rinsed. At this time, the temperature inside the cleaning chamber 3 rises rapidly, so that the air inside expands. However, the expanded part is released to the outside air through the steam vent duct 60 at the ceiling of the cleaning chamber 3. No excessive pressure rise occurs in the chamber. Further, although it communicates with the outside air through the steam vent duct 60, a water-permeable cover 63 is provided on the lower edge of the ventilation box main body 61, and a narrow ventilation gap g is formed between the ventilation chamber main body 61 and the side wall of the cleaning chamber 3. And a narrow ventilation slit s is formed in the lower edge portion (see FIG. 15). Therefore, even if the water sprayed from the rinsing nozzle 13 hits the tableware and bounces upward, as shown by the broken line in the figure, the bounced water is blocked by the other side wall of the water-blocking cover 63 and Is prevented from entering the inside. Further, even if a part of the injected water passes through the ventilation slit s depending on its direction, it will collide with the other side wall, and this will rise inside the water-impervious cover 63, and the steam vent duct 60 It can be reliably prevented from jumping out of the machine.
[0021]
In this rinsing step, new warm water is additionally supplied to the cleaning chamber 3. Accordingly, the water level in the water storage section 11 of the cleaning tank 2 rises, flows into an overflow hole 26 formed in the inner cylinder 21 of the overflow pipe 19 in the cleaning tank 2, and the drain port body 15 at the bottom of the cleaning tank 2 from the inner cylinder 21. To be discharged outside the aircraft.
When the above-described rinsing process is completed, the washing is completed, and the dishes are naturally dried by the residual heat of the hot water. To clean the washing machine after washing the dishes, the primary filter 14 of the washing tank 2 is removed, the handle 23 of the overflow pipe 19 is gripped by hand, and the drain valve 20 is opened to drain the inside of the washing tank 2. . Since it takes a certain amount of time to complete the drainage, the hook 23a of the handle 23 is hooked on the engagement hole 25 provided in the filter mounting frame 24, and the overflow pipe 19 is maintained in a drained state with the overflow pipe 19 pulled up. In the meantime, the filters 14, 30 and the inner wall of the cleaning tank 2 may be cleaned. After cleaning, the hook 23a of the handle 23 is removed from the engagement hole 25, the overflow pipe 19 is returned to the original drain stop position, and the filters 14 and 30 are attached.
[0022]
<Effects of the embodiment>
The advantages specific to the present embodiment as compared with the conventional configuration are as follows.
(1) Improvement of heat utilization efficiency
When the cleaning liquid is circulated in the cleaning process, the heater 54 of the hot water storage tank 50 is energized to heat the water in the hot water storage tank 50 for the next rinsing process, and high-temperature hot water is generated. At this time, it is unavoidable that heat escapes from the wall surface of the tank body 51 of the hot water storage tank 50. However, since the hot water storage tank 50 is provided so as to be immersed in the cleaning liquid in the cleaning tank 2, the heat is dissipated from the wall surface of the tank main body 51. The heat thus obtained is eventually used to heat and maintain the cleaning liquid. This means that the washing process uses lukewarm water and the rinsing process uses hot water, which is suitable for the actual situation of this type of washing machine, and means that effective heat utilization is performed and heat consumption is reduced.
[0023]
Moreover, in the present embodiment, in particular, since the steam generated in the hot water storage tank 50 is caused to flow into the water receiving tank 40 through the steam releasing hose 58, the low-temperature water in the water receiving tank 40 can be preheated. The heat utilization efficiency can also be improved from the aspect.
In addition, it is conceivable that the steam in the hot water storage tank 50 is drained not in the water receiving tank 40 but in the cleaning tank 2. In this case, the dirty cleaning liquid in the cleaning tank 2 is removed from the steam drain pipe provided in the cleaning tank 2. May flow back into the hot-water storage tank 50 and contaminate the fresh water to be used in the rinsing process, which is not preferable.
(2) Preventing backflow of water to the water source
The pressure in the hot water storage tank 50 rises particularly when the water is heated, and if the water supply pipe from the water supply is simply connected directly to the hot water storage tank 50, the water may flow backward to the water source side through the water supply pipe. Can be However, in the present embodiment, the water from the tap water is once received by the water receiving tank 40 having the cistern structure, and is sent from the water receiving tank 40 to the hot water storage tank 50. The backflow of water can be reliably prevented.
[0024]
It is not inconceivable that the cistern structure is provided in the hot water storage tank 50 and the water receiving tank 40 is omitted depending on conditions such as the size of the washing tank. However, if the hot water storage tank is provided with a cistern structure, it is essential to secure a certain distance or more between the outlet of the water supply pipe from the water supply and the highest water level from the viewpoint of reliable backflow prevention, Hot water storage tanks cannot avoid being large. Then, not only does it become necessary to increase the output of the heater 54, but also in the washing machine having the washing tank 2 of the present embodiment, much of the internal volume of the water storage section 11 of the washing tank 2 is increased by the hot water tank 50. As a result, the space in which the cleaning liquid is actually stored is reduced. This means that in this type of washing machine in which the washing liquid in the water storage section 11 is sprayed while being suctioned by the washing pump 28, when the washing operation is started and the washing liquid adheres to tableware and the like and foams, the water is stored. Since the liquid level in the part 11 is rapidly lowered, it means that the air is sucked in from the suction port of the cleaning pump 28 and the cleaning pump 28 is liable to cause a so-called air biting phenomenon in which the cleaning pump 28 malfunctions.
[0025]
In this regard, according to the configuration in which the water receiving tank 40 is provided separately from the hot water storage tank 50 as in the present embodiment, the capacity of the hot water storage tank 50 can be reduced, so that the heater output can be reduced, and the fluctuation in the level of the cleaning liquid can be reduced. The air entrapment phenomenon of the cleaning pump 28 can be reliably prevented by keeping it small.
(3) Improvement of space utilization efficiency in the main body box 1
In a configuration in which a tank for storing hot water is arranged in the main body box as in the washing machine of the present embodiment, there is an advantage that the installation space of the entire system is smaller than that in a case where it is provided outside the machine.
In this type of configuration, a large-sized cleaning tank must be provided in the main body box. Therefore, it is necessary to incorporate a tank for storing hot water in a remaining space outside the cleaning tank. However, the tank requires a certain amount of capacity to secure the amount of hot water stored, and it is easy to increase the size.Moreover, the remaining space outside the washing tank further includes a washing pump and its related piping, a rinsing pump and its Other large equipment such as associated piping, control boxes and operation boxes must also be located. For this reason, in the tank built-in type, there is a problem that a dead space is easily generated, the space use efficiency cannot be sufficiently increased, and the main body box itself becomes large.
[0026]
On the other hand, in the present embodiment, the tank for storing hot water is divided into two tanks, the water receiving tank 40 and the hot water storage tank 50. Each tank 40, 50 can be miniaturized. As a result, it is possible to increase the space utilization efficiency and reduce the size of the main body box 1 itself without generating dead space in the main body box 1 as much as possible.
In addition, in tanks that receive water directly from water heaters such as instantaneous water heaters and water taps, water outlets should be provided at a position that is higher than the overflow water level by a predetermined dimension to reliably prevent backflow of water to the water supply side. Is required by regulations, and therefore, the upper space in the tank for receiving tap water must be wasted space. For this reason, if water is received in one large tank, the wasted space will be increased and the space utilization efficiency will be reduced.
[0027]
In this regard, according to the present embodiment, since the tank for receiving water from the water supply device is a relatively small water receiving tank 40, it is necessary to secure a predetermined height between the overflow water level and the water discharge port. Even if there is, the volume of the wasted space generated thereby is also reduced, and the space utilization efficiency can be improved as compared with a configuration in which one large tank receives water.
(4) Saving water and detergent for cleaning process
In a circulating configuration in which the cleaning liquid stored in the cleaning tank is suctioned by the cleaning pump and injected into the dishes, and then returned to the cleaning tank by the filter, the size of the cleaning tank is considerable because the filter filtration area is sufficient. There is a situation that becomes larger. For this reason, the amount of water of the cleaning liquid stored here is large, and the amount of detergent is also large.
[0028]
In this regard, in this embodiment, the hot water storage tank is divided into a water receiving tank 40 and a hot water storage tank 50, and the hot water storage tank 50 is disposed in the water storage section 11 of the cleaning tank 2. For this reason, the effective volume in the water storage section 11 of the cleaning tank 2 is reduced, and the size of the cleaning tank 2 itself is increased to ensure a sufficient filtration area of the filters 14 and 30 while the amount of water of the cleaning liquid stored therein is maintained. And the required amount of detergent can be correspondingly saved.
(5) Reduction of water leakage during the cleaning process
Since the drain valve 20 of the cleaning tank 2 is closed during the cleaning process, the cleaning liquid is sprayed from the cleaning nozzle 12 and circulated to the upper end of the overflow pipe 19 in the water reservoir 11 while being stored. In this state, if the water level of the cleaning liquid falls below the overflow hole 26 of the overflow pipe 19, no water leakage should occur.
[0029]
However, in actuality, in the conventional cleaning machine, water leakage through the overflow pipe continued during the cleaning step of circulating the cleaning liquid. The cause was as follows. That is, in the cleaning process, the cleaning liquid is sprayed from the cleaning nozzle, flows into the liquid receiving section of the cleaning tank, and flows down from the primary tank through the primary filter to the liquid storage section. For this reason, the cleaning liquid also flows down to the upper end of the overflow pipe, flows along the peripheral wall of the overflow pipe, and flows out of the overflow hole. Conventionally, the amount of water leakage is about 1 liter per minute. For example, 6 liters of cleaning liquid is lost during a cleaning process of 6 minutes, which is not only uneconomical but also causes a decrease in cleaning capacity. there were.
[0030]
On the other hand, in the present embodiment, since the annular baffle plate 27 is fitted over the overflow hole 26 in the inner cylinder 21 of the overflow pipe 19, the cleaning liquid temporarily drops from above the overflow pipe 19. Even if the cleaning liquid flows down along the peripheral wall of the inner cylinder 21, the cleaning liquid is blocked by the annular baffle plate 27 and does not flow into the overflow hole 26. Note that the annular baffle plate 27 may be configured to protrude in a shade shape from the peripheral wall of the inner cylinder 21. However, as in the present embodiment, the overflow pipe 19 is a double cylindrical shape of the inner cylinder 21 and the outer cylinder 22. In this case, if the outer diameter of the annular baffle plate 27 is increased, the size of the gap between the annular baffle 27 and the inner peripheral wall of the outer cylinder 22 becomes too small, and there is a possibility that solids and the like that have flowed down from tableware may be clogged. is there. Incidentally, in the present embodiment in which the inner diameter of the outer cylinder 22 is set to 48 mm, the outer diameter of the inner cylinder 21 is set to 28 mm, and the outer diameter of the annular baffle plate 27 is set to 40 mm, water leakage occurs without clogging of solid matter. The amount could be suppressed to about 100 cc / min, and when the outer diameter of the annular baffle 27 was set to 35 mm, the amount of water leakage could be suppressed to 120 cc / min.
[0031]
(6) Function to prevent forgetting to set overflow pipe 19
In the configuration in which the overflow pipe 19 is provided with the drain valve 20 as in this embodiment, at the time of drainage, the overflow pipe 19 is extracted and drained, and various places are cleaned. However, conventionally, no consideration has been given to the treatment of the overflow pipe at the time of drainage, so it is difficult to place the overflow pipe, etc. there were. If the setting of the overflow pipe is forgotten, the drainage state is left, so that all the supplied hot water is discharged.
[0032]
In view of this, in the present embodiment, an engagement hole 25 is formed in the filter mounting frame 24 for the primary filter 14, and the handle 23 of the overflow pipe 19 can be hooked here. As a result, at the time of drainage, the hook portion 23a of the handle 23 can be hooked on the engagement hole 25 and the overflow pipe 19 can be maintained in the drained state, and there is no trouble in the treatment. Moreover, if the primary filter 14 is mounted on the filter mounting frame 24 after forgetting to reset the overflow pipe 19 after the filters 14 and 30 have been cleaned, the handle 23 of the overflow pipe 19 will hinder the resetting. Since it is impossible, it is possible to notice that the overflow pipe 19 is in a drained state, and it is possible to reliably prevent forgetting to reset the overflow pipe 19.
[0033]
(7) Improvement of maintainability of steam vent duct 60
Conventionally, in this type of washing machine, a steam vent duct is inserted from above into the ceiling of the main body box to communicate the inside and outside of the main body box in order to discharge the steam filling the cleaning tank. .
For this reason, to remove the steam vent duct for maintenance work, the duct must be pulled up from the ceiling of the main box, so there must be sufficient space between the main box and the ceiling of the room. There was a problem of becoming.
In this regard, in the present embodiment, the steam vent duct 60 is configured as an upper and lower two-part type comprising a vent box main body 61 and a water-blocking cover 63 detachably attached to the lower part thereof, and a screw 64 connecting the two is provided in a cleaning chamber. 3 so that it could be removed from the inside. As a result, if the screw 64 is removed from the inside of the cleaning chamber 3 and the lower half water-impervious cover 63 is removed inside the cleaning chamber 3, the steam vent duct 60 is disassembled and only the upper half ventilation box main body 61 is replaced with the main body box. It will remain on one side. Therefore, it can be removed from the main body box 1 by pulling it up only by about half the height of the steam vent duct 60. Even if the gap between the main body box 1 and the ceiling of the room is narrow, it is easy Maintenance work can be performed.
[0034]
In order to achieve this effect, a cleaning operation is performed by spraying a cleaning liquid onto an object to be cleaned stored in a cleaning chamber in the main body box, and a steam vent duct for communicating the cleaning chamber with the outside of the main body box is provided in the main body box. In the cleaning machine detachably mounted on the cleaning chamber, the steam vent duct may be configured to be splittable along the mounting direction and connected by a fixture that can be removed from the cleaning chamber. With this, during maintenance of the steam vent duct, insert the hand into the washing chamber and remove the fixture to remove the part of the steam vent duct inside the washing chamber, and then remove the remaining part of the steam vent duct from the outside of the main body box Therefore, even when the gap between the main body box and the chamber wall is small, the entire steam vent duct can be easily removed.
[0035]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are possible, and these are also included in the technical scope of the present invention.
(B) In the above embodiment, the annular baffle plate 27 is provided on the inner cylinder 21 of the overflow pipe 19; however, the present invention is not limited to this. For example, a mesh plate 66 is provided on the upper end opening of the outer cylinder 22 as shown in FIG. May be adopted. Even in this configuration, even if the cleaning liquid flows down from above the overflow pipe 19, the momentum is weakened by the mesh plate 66. Therefore, it is possible to prevent the cleaning liquid from flowing down from the upper end of the inner cylinder 21 and leaking from the overflow hole 26 as much as possible. it can.
[0036]
Also, as shown in FIG. 18, even in a configuration in which a cap-shaped shielding plate 67 having a falling wall 67a at the outer peripheral portion is attached to the upper end of the outer cylinder 22, the leakage of the cleaning liquid can be effectively prevented, and In this case, a pipe having a simple structure with an open top can be used without providing the overflow hole 26 in the peripheral wall of the inner cylinder 21 (not shown).
Further, the overflow pipe does not necessarily have to be a double cylindrical shape, and may of course be a simple cylindrical shape.
(B) In the above embodiment, the water is supplied from the water receiving tank 40 to the hot water storage tank 50 by natural inflow. However, both tanks may be connected via a pump. In that case, the water receiving tank can be arranged at a lower position than the hot water storage tank, so that the degree of freedom in the arrangement of each tank is increased and the space utilization rate in the main body box can be further increased. Become.
[0037]
In addition, the present invention is not limited to the embodiment described above with reference to the drawings and drawings, and can be variously modified and implemented without departing from the gist. The embodiment shown in FIG. 19 is also possible in this type of washing machine.
This is a configuration in which the water storage section 11 of the cleaning tank 2 has a significantly smaller bottom area as compared with those of the above-described embodiments, and the hot water storage tank 50 is disposed near the outside of the water storage section 11. In this way, the water storage portion 11 can be made sufficiently deep, so that a decrease in the liquid level during the cleaning operation can be prevented, whereby it is ensured that the air is sucked into the cleaning pump and the air biting phenomenon occurs. This has the advantage that it can be prevented.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a washing machine according to a first embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view showing the internal structure.
FIG. 3 is a partially exploded perspective view of a main body box.
FIG. 4 is a plan view of a main body box.
FIG. 5 is a longitudinal sectional view taken along line vv in FIG. 4;
FIG. 6 is a partially cutaway front view showing the internal structure of the main body box.
FIG. 7 is a partially cutaway side view showing the internal structure of the main body box.
FIG. 8 is an exploded perspective view of a water receiving tank.
FIG. 9 is a side view of a water receiving tank.
FIG. 10 is a partially broken front view of the hot water storage tank.
FIG. 11 is a perspective view showing a connection relationship between a water receiving tank and a hot water storage tank.
FIG. 12 is a vertical cross-sectional view of the inside of the cleaning tank in a drained state
FIG. 13 is a cross-sectional view of the overflow pipe with a part cut away.
FIG. 14 is a partially enlarged sectional view of an overflow pipe.
FIG. 15 is a sectional view of a ceiling of a cleaning room.
FIG. 16 is an exploded perspective view showing a steam vent duct in the cleaning chamber.
FIG. 17 is a sectional view showing a modification of the overflow pipe.
FIG. 18 is a sectional view showing a modification of the overflow pipe.
FIG. 19 is a schematic front view showing the internal structure according to another embodiment of the cleaning machine.
[Explanation of symbols]
2 ... Cleaning tank 3 ... Cleaning room 14 ... Primary filter 15 ... Drain port 19 ... Overflow pipe 20 ... Drain valve 26 ... Overflow hole 28 ... Cleaning pump 40 ... Water receiving tank 50 ... Hot water storage tank 54 ... Heater 60 ... Steam release duct

Claims (3)

Includes a cleaning tank in the body box in the cleaning machine for cleaning operation while pooled water washing the object to be cleaned in the body box in the cleaning tank, the hot water storage tank for storing hot water for providing the cleaning operation , washer, characterized in that it is arranged in a form submerged reserved in the cleaning tank Oite to the cleaning tank. A washing machine that includes a washing tank in the main body box and performs a washing operation while storing hot water that has washed the object to be washed in the main body box in the washing tank.
A hot water storage tank for storing hot water for use in the cleaning operation is arranged in the cleaning tank,
And a water receiving tank having a cistern structure for receiving water from the water source side is provided outside the washing tank , and the water receiving tank is communicated with the hot water storage tank ,
Further, the washing machine is provided with a steam vent pipe for discharging steam inside the hot water storage tank to the water receiving tank . The washing machine according to claim 2, wherein the water receiving tank is provided at a position higher than the hot water storage tank.

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