RU2672479C1 - Pump device for household appliances - Google Patents

Abstract

FIELD: motors and pumps.SUBSTANCE: pumping device (103) for household appliance (100), comprising drive (105) with first impeller (107) for operating pumping device (103) in a first operating mode in a first feeding direction for evacuating the fluid from household appliance (100) and with second impeller (109) for operation of pump (103) in the second operating mode in the second direction of supply for the purpose of pumping fluid inside appliance (100), and between drive (105) and first impeller (107) provides first clutch (119) freewheel, and between drive (105) and second impeller (109) there is second clutch (121) of free travel, arranged in such a way that, depending on the first or second operating mode, only first impeller (107) or only second impeller (109) is driven.EFFECT: pumping device for a household appliance was proposed.13 cl, 2 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a pump for a household appliance, in particular, to a washing machine or dishwasher for laundry or utensils.

State of the art

Household appliances, in particular washing machines and dishwashers, for reasons of efficiency and in order to increase the cleaning effect, are equipped with a water circulation system, and washing liquid or process water is repeatedly introduced into the washing or washing process. At the same time, the cleaning efficiency is significantly increased due to the multiple removal of mud particles. However, installing an additional pump for this additional process in any case means additional costs.

Patent application DE 1460948 A1 discloses a washing machine pump unit for selectively supplying a pumped liquid by changing the direction of rotation of a pump shaft. Two pump wheels are located on the pump shaft, at least one of which has axial blades, each impeller being surrounded by its own pump casing with two nozzles, the design being made in such a way that in each direction of rotation the fluid is transported by only one pump wheel.

Disclosure of the invention

An object of the present invention is to provide an economical pump for a household appliance.

According to the invention, the problem is solved by a pumping device, the pumping device comprising a drive with a first impeller for operating the pumping device in a first operating mode in a first supply direction for pumping liquid from a household appliance and with a second impeller for operating the pumping device in a second working mode in the second direction of supply in order to pump fluid inside the household appliance, and between the drive and the first impeller, a first clutch is provided travel-stand, and between the actuator and the second impeller, a second freewheel arranged so that depending on the first or second operating mode drive only the first impeller and the second impeller only. This gives a technical advantage, for example, in that a single drive allows two different operations, namely pumping and pumping. In addition, in this embodiment, it is possible to carry out simple control of the hydraulic system in order to perform pumping and pumping by simply changing the direction of rotation of the drive. Due to this, it is possible to obtain a very compact design of the pump inside the household appliance, since there is no need for a separate pump for each operating mode.

The impeller in the sense of this description contains, in particular, an impeller surrounded by a housing in the form of a ring or tube.

In one embodiment, the first impeller and the second impeller are of the same design.

In a further embodiment, a coupling or connection is provided between the first impeller and the drive, independent of the coupling acting in two opposite directions of rotation, in particular the electromagnetic coupling acting in two opposite directions of rotation. This gives a technical advantage, which consists, in particular, in the simplicity of the mechanical structure and the creation of a simple and reliable connection or connection between the first impeller and the drive.

In a further embodiment, a coupling or connection is provided between the second impeller and the drive, independent of the coupling acting in two opposite directions of rotation, in particular the electromagnetic coupling acting in two opposite directions of rotation. This provides a technical advantage, for example, in the simplicity of the mechanical structure and in the creation of a simple and reliable connection or connection between the second impeller and the drive.

To increase the compactness of the pumping device, the first impeller and the second impeller are connected to the drive by a common drive axis. This makes it possible to significantly simplify and reduce the cost of the connection between the drive and the drive axle, since the drive is not equipped with a second drive axle. In addition, this design reduces the cost of installing the pumping device during manufacture.

To facilitate the achievement of the necessary compactness of the pumping device, taking into account the provision of two separately operating operating modes, the first impeller and the second impeller are located on opposite sides of the drive.

To increase the efficiency of the pumping device and the functioning of the operating mode of pumping the washing solution from the household appliance into the sewer network, the pumping device contains a first pressure chamber related to the first impeller. As a result, the rotation of the first impeller inside the first pressure chamber creates a flow of washing solution directed from the first pressure chamber to the sewer network.

To increase the efficiency of the pumping device and the operation of the operating mode of pumping the washing solution inside the household appliance, the pumping device contains a second pressure chamber related to the second impeller. As a result, the rotation of the second impeller inside the second pressure chamber creates a washing solution stream directed from the second pressure chamber. For example, the washing solution can then be returned to the cleaning process in a household appliance.

In order to minimize the dependence of the household appliance or pumping device on interference or defects, as well as the maintenance costs of the household appliance, the first pressure chamber and the second pressure chamber are connected by separate connections configured to transmit a fluid to a fluid reservoir, in particular , a tank for the washing solution of the household appliance. This allows you to implement a design in which, for example, in case of contamination or clogging of the pumping device, both connections will not necessarily be blocked with the possibility of fluid transfer or the operation of both pressure chambers will be disrupted. Therefore, both operating modes will not be blocked at the same time, and the possibility of limited operation of the household appliance will remain. In addition, each fluid transfer connection and each impeller can be cleaned or maintained regardless of the current operating mode.

Preferably, the pump device comprises a common suction chamber for the first pressure chamber and the second pressure chamber. Thus, one connection pipe between the pumping device and the fluid reservoir of the appliance is sufficient. Through this connecting pipe, when the pump device is operating, fluid is sucked from the fluid reservoir into the suction chamber of the pump device. It does not matter which of the two impellers is involved.

Preferably, inside the pump device, a first fluid transfer connection leading from the suction chamber to the first pressure chamber is formed and a second fluid transfer connection leading from the suction chamber to the second pressure chamber. Thus, there is no need for separate connecting pipes between the suction chamber and the first / second pressure chamber. This greatly simplifies the assembly process.

In particular, the first fluid transfer connection is in the form of an inlet pipe. Advantageously, the suction chamber is located in the axial direction immediately in front of the first pressure chamber. The flow from the suction chamber to the first pressure chamber is determined by the cross section of the inlet pipe. Advantageously, the suction chamber is separated from the first pressure chamber by only one wall in which an opening is made. This hole is preferably made in the form of an inlet pipe. In particular, the inlet pipe enters the suction chamber.

In particular, the second connection with the possibility of fluid transfer is made in the form of a channel in the housing of the pumping device. Preferably, this second fluid transfer connection extends axially through the entire pumping device from the suction chamber to the second pressure chamber. Preferably, the output of the second connection with the possibility of transferring fluid is located centrally relative to the impeller of the second pressure chamber.

Advantageously, a common filter is located in the suction chamber for a first connection with the possibility of transferring fluid to the first pressure chamber and a second connection with the possibility of transferring fluid with the second pressure chamber. Thus, a single filter is sufficient for both connections with the possibility of fluid transfer. Such a filter may, for example, have different passage openings for the first and second connections with the possibility of fluid transfer.

To further facilitate maintenance and cleaning of the pumping device, the filter is replaceable. In this case, the replaceable filter can be made in the form of a lime filter, a nap filter, a trap of foreign particles, or any other filter.

To improve serviceability, in particular for users of a household appliance, the filter is placed in a place accessible to the user. In other words, the characteristics of the filter allow the user to easily remove it from the household appliance, for example, via a plug or screw connection, and replace a clogged or damaged filter with a new filter. Preferably, the filter can be replaced manually without using a special tool. For example, access to the filter for the user can be realized using a cover accessible from the outside.

In a particularly preferred embodiment, the pumping device is configured to operate in a third operating mode, the first pressure chamber being connected to the second pressure chamber with the possibility of transferring fluid. This can be realized, for example, using an additional valve, made in the form of a simple three-way valve. This allows you to clean the first pressure chamber and the second pressure chamber by operating the pumping device and the first impeller or second impeller with additional functional testing. This is especially advantageous if the compact design of the pumping device does not allow the user or the specialist engaged in the repair, maintenance or cleaning of the pumping device or household appliance to easily access the first and second pressure chamber. In particular, in embodiments in which access to one of the pressure chambers is greatly simplified compared to access to another pressure chamber, operation in the third operating mode is particularly advantageous.

In particular, in cooperation with freewheels located in the pump device, respectively, between the drive and the first impeller, as well as the drive and the second impeller, the first impeller is operable in the first direction of rotation, and the second impeller is in a second direction of rotation opposite the first direction of rotation. This allows you to implement control of the hydraulic system of the pumping device, characterized by a very high degree of independence and simplicity. By simply selecting the direction of rotation of the drive, it is possible to pump out or pump fluid in a domestic appliance.

To implement the drive with particular ease, efficiency and the use of existing technologies, the drive contains a brushless DC motor.

In a separate embodiment, the pumping device comprises a shutter for cleaning or maintenance. This flap can serve as an alternative or as an addition to the aforementioned cover for the maintenance or monitoring of a household appliance. In this case, the shutter could be made in such a way that it allows you to replace the first impeller and / or second impeller.

In a further separate embodiment, the pumping device is adapted to drive a second impeller by mechanically moving the first impeller. This allows, for example, in addition to the aforementioned damper, to realize the function of a pumping device, which ensures complete and perfect cleaning of the pump, the first pressure chamber, the second pressure chamber, the first impeller and the second impeller. For example, such a function can be realized by mechanically connecting the first and second impeller with the transfer of force from the first impeller to the second impeller or vice versa. Thus, it is possible to temporarily suspend the operation of the first and second overrunning clutches in order to perform cleaning of the pumping device. After cleaning, it will be possible to again break the mechanical connection and restore the initial state of the pumping device.

This problem is solved by the subject of the invention with the features disclosed in the independent claim. Advantageous embodiments of the invention are presented in the drawings, in the description and in the dependent claims.

Brief Description of the Drawings

The figures depict:

Figure 1: schematic illustration of a household appliance with a pumping device.

Figure 2: schematic representation of a pumping device.

The implementation of the invention

The figure 1 schematically shows a household appliance 100, for example, in the form of a washing machine with a pumping device 103. In the upper part of the household appliance 100 is a tank 101 for a fluid, for example, in the form of a tank for washing solution, configured to receive a fluid, for example detergent or washing solution and items to be cleaned. A pump device 103 located directly below the fluid container 101 is configured to pump fluid or detergent from the fluid tank 101 into the sewer network 104. In addition, the pump device 103 is configured to pump fluid or detergent from the tank 101 for the fluid inside the home appliance 100. In other words, the home appliance 100 is configured to pump washing liquid removed from the fluid tank 101 back to it as needed bone 101 for the fluid, re-supplying fluid to the cleaning process.

Figure 2 schematically shows a pumping device 103. The pumping device 103 includes a drive 105, made, for example, in the form of a brushless DC motor. The drive 105 receives energy from a power source 108. In addition, the drive 105 is connected to the first impeller 107 and the second impeller 109. In this case, the first impeller 107 and the second impeller 109 have a common drive shaft 106, and between the drive 105 and each impeller, that is, between the drive 105 and the first the impeller 107 and between the drive 105 and the second impeller 109, respectively, on the common drive shaft 106 is a first freewheel 119 and a second freewheel 121. The first freewheel clutch 119 and the second freewheel clutch 121, respectively assigned to the first impeller 107 and the second impeller 109, are configured so that the rotation of the common drive shaft 106 by the actuator 105 in the first direction of rotation drives only the first impeller 107 moreover, the second impeller 109 should not be driven by a freewheel connected to it 121. When the drive 105 operates in a second direction of rotation opposite the first direction of rotation, and the common drive shaft 106 connected to the drive 105 rotates in the corresponding second direction of rotation, the drive 105 drives only the second impeller 109. Due to the fact that the first impeller 107 by means of the first freewheel clutch 119 is seated on a common drive shaft 106, it does not rotate when rotated in the second direction. Therefore, depending on the direction of rotation with which the drive 105 drives the common drive shaft 106, in each case, only one of the two impellers, that is, the first impeller 107, will rotate when the common drive shaft 106 rotates in the first direction or the second impeller 109 when the common drive shaft 106 rotates in the opposite or second direction.

In order to be able to drive the first impeller 107 and the second impeller 109 separately, and also to use the pump device 103 depending on the direction of rotation for the first and second supply directions, the pump device 103 comprises a first pressure chamber 113 associated with the first impeller 107, and a second pressure chamber 115 associated with the second impeller 109. To use the pump device 103 in the first supply direction, for example, to pump fluid or detergent from the tank 101 for By teaching the medium of the household appliance 100 to the sewer network 104, liquid is supplied to the first pressure chamber 113 through the first fluid connection 125 and the suction chamber 124 of the pump device 103. The first pressure chamber 113 is connected to the first impeller 107, or the first impeller 107 located in the first pressure chamber 113. The rotation of the first impeller 107 forms a washing fluid stream directed from the first pressure chamber 113 into the sewer network 104. Similarly, for using the pump device 103 in the second direction of supply, that is, pumping fluid or detergent from the fluid container 101 to the household appliance 100 and thereby supplying the used detergent liquid back to the cleaning process in the household appliance 100, a second connection 126 is made with the possibility of transferring fluid from the chamber 124 suction of the pump device 103 to the second pressure chamber 115 of the pump device 103. Since the second impeller 109 is located inside the second pressure chamber 115, the rotation of the second impeller 109 forms a flow of washing liquid in the second supply direction from the second pressure chamber 115. For example, washing liquid can be fed back to the cleaning process in the household appliance 100. Thus, by simply controlling the rotation direction of the actuator 105, the operation of the pump device 103 or the supply direction of the pump device 103 can be controlled.

In the suction chamber 124, there may be a common filter for the first connection 125 with the possibility of transferring fluid to the first pressure chamber 113 and the second connection 126 with the possibility of transferring fluid to the second pressure chamber 115. Thus, for both connections with the possibility of transferring fluid, one filter. This filter may contain, for example, various passage openings for the first and second connections with the possibility of fluid transfer.

In order to further increase the convenience of maintenance and cleaning of the pump device 103, the filter is replaceable. In this case, the replaceable filter can be made in the form of a lime filter, a nap filter, a trap of foreign particles, or any other filter.

In addition, the pump device 103 includes a shutter 123 for cleaning or servicing the pump device 103. Such a shutter 123 can be attached to the housing of the pump device 103, for example, by thread or other simple connection. Such a shutter 123 allows improved access to the first impeller 109 for cleaning or maintenance. It is also possible to install an additional damper on the pump device 103, providing access to the second impeller 109 inside the second pressure chamber 115.

Alternatively, separate and independent connections may be provided for transferring fluid between the fluid container 101, the first pressure chamber 113 and the second pressure chamber 115. In this case, the household appliance 100 is particularly insensitive to interference that may be caused by clogging. . In the event of contamination or clogging of the pump device 103, both connections will not necessarily become clogged with the possibility of fluid transfer and, therefore, the operation of both pressure chambers will not necessarily be disrupted. Therefore, both operating modes will not be violated, and limited operation of the household appliance 100 will remain possible. Moreover, both the fluid transfer connection for the first pressure chamber 113 and the fluid transfer connection for the second pressure chamber 115 have a replaceable filter. These filters are located in places accessible to users of the household appliance. In other words, the characteristics of the filters allow the user to easily remove them from the household appliance 100, for example, by means of a plug or screw connection, and replace clogged or damaged filters with new filters. Filters can be replaced manually without using a special tool. For example, access to filters for a user can be realized using an externally accessible lid.

All the features disclosed in connection with individual embodiments and shown in the figures can be combined in various ways within the framework of the present invention, which makes it possible to simultaneously realize their advantages.

LIST OF REFERENCE NUMBERS

100 household appliance

101 fluid tank

103 pumping device

104 sewer network

105 drive

106 drive shaft

107 first impeller

108 power source

109 second impeller

113 first pressure chamber

115 second pressure chamber

119 first freewheel

121 second freewheel

123 damper

124 suction chamber

125 first fluid transfer connection

126 second fluid transfer connection

Claims (13)

1. A pump device (103) for a household appliance (100), comprising a drive (105) with a first impeller (107) for operating a pump device (103) in a first operating mode in a first supply direction in order to pump fluid from a household appliance ( 100) and with a second impeller (109) for operating the pump device (103) in a second operating mode in a second supply direction for pumping fluid inside the appliance (100), between the drive (105) and the first impeller (107) the first clutch (119) of the free ho yes, and between the drive (105) and the second impeller (109) a second freewheel (121) is provided so that, depending on the first or second operating mode, only the first impeller (107) or only the second impeller is driven wheels (109), wherein the pump device (103) comprises a first pressure chamber (113) related to the first impeller (107) and a second pressure chamber (115) related to the second impeller (107), characterized in that the pump device (103) comprises a common suction chamber (124) for the first pressure chamber (113) and the second pressure chamber (115). 2. A pump device (103) according to claim 1, characterized in that the first impeller (107) and the second impeller (109) are connected to the drive (105) by a common drive shaft (106). 3. The pump device (103) according to one of the preceding paragraphs, characterized in that the first impeller (107) and the second impeller (109) are located on opposite sides of the drive (105). 4. A pump device (103) according to one of the preceding claims, characterized in that a first connection (125) is formed inside the pump device (103) with the possibility of transferring a fluid leading from the suction chamber (124) to the first pressure chamber (113), and a second fluid transfer connection (126) leading from the suction chamber (124) to the second pressure chamber (115). 5. A pump device (103) according to claim 4, characterized in that in the suction chamber (124) there is a common filter for the first connection (125) with the possibility of transferring fluid with the first pressure chamber (113) and the second connection (126) with the ability to transfer fluid with a second pressure chamber (115). 6. The pump device (103) according to claim 5, characterized in that the filter is replaceable. 7. The pump device (103) according to claim 6, characterized in that the filter is installed in a place accessible to the user. 8. A pump device (103) according to one of the preceding paragraphs, characterized in that the pump device (103) is configured to operate in a third operating mode, the first pressure chamber (113) being connected to the second pressure chamber (115) with the possibility of fluid transfer Wednesday. 9. A pump device (103) according to one of the preceding paragraphs, characterized in that the first impeller (107) is operable in the first direction of rotation, and the second impeller (109) in the second direction of rotation opposite to the first direction of rotation. 10. The pump device (103) according to one of the preceding paragraphs, characterized in that the drive (105) contains a brushless DC motor. 11. The pump device (103) according to one of the preceding paragraphs, characterized in that the pump device (103) comprises a shutter (123) for cleaning or maintenance. 12. The pump device (103) according to one of the preceding paragraphs, characterized in that the pump device (103) is configured to drive a second impeller (109) by mechanical movement of the first impeller (107). 13. A household appliance (100) with a pumping device (103) according to one of the preceding paragraphs.

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