A countertop water purifier and its water output control method, device and storage medium

Abstract

This invention discloses a method, device, countertop water purifier, and storage medium for controlling the water output of a countertop water purifier. The method includes: receiving a water output command from a user and controlling a switch module to open; controlling the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, as well as the opening degree after opening, in stages according to the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so as to maintain the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device; receiving a water shut-off command from a user and controlling the switch module to shut off, and delaying the opening and closing of the outlet flow rate regulation module to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal water outlet pipe. This solution, by balancing the pressure value in the outlet pipe behind the shut-off valve with the external environment after the water is turned off by pressing the button, prevents water from dripping out after the water is turned off by pressing the button, thus improving the user experience.

Description

Technical Field

[0001] This invention belongs to the technical field of countertop water purifiers, specifically relating to a method, device, countertop water purifier, and storage medium for controlling the water output of a countertop water purifier, and particularly to a method, device, countertop water purifier, and storage medium for controlling the pressure reduction of the water output pipeline of a countertop water purifier. Background Technology

[0002] As water quality deteriorates nationwide, drinking water quality has become an increasingly important concern. The market has seen a proliferation of water purifiers, including under-sink, countertop, and drop-in models, and models based on filter material such as reverse osmosis and ultrafiltration. These purifiers have improved the quality of drinking water. With rising demands for more convenient and intelligent countertop water purifiers, users have noticed a problem: even after turning off the water flow, water continues to drip, negatively impacting the user experience.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a method, device, countertop water purifier, and storage medium for controlling the water output of a countertop water purifier. This addresses the problem that after prolonged use, users often find that water continues to drip even after the water is turned off by pressing the button, negatively impacting the user experience. The invention achieves this by installing a bypass pressure-reducing branch in the outlet pipe downstream of the shut-off valve 1. A pressure-reducing device 4 is installed in this bypass pressure-reducing branch. By controlling the current pressure inside the pressure-reducing device 4, the pressure in the outlet pipe downstream of the shut-off valve 1 is balanced with the external pressure after the water is turned off. This prevents water droplets from forming water stains at the outlet of the countertop water purifier after the water is turned off, thus improving the user experience.

[0005] This invention provides a method for controlling the water output of a countertop water purifier. The countertop water purifier has a water output pipe, and a switch module is installed in the water output pipe. The switch module is used to control the opening or closing of the water output pipe. A portion of the water output pipe located behind the switch module is designated as the terminal water output pipe. A bypass pipe, designated as a bypass pressure-reducing branch, is installed at the terminal water output pipe. The bypass pressure-reducing branch is bypassed between the pipe where the inlet of the terminal water output pipe is located and the pipe where the outlet is located. Along the bypass pressure-reducing branch, in the direction from the switch module to the outlet of the terminal water output pipe, an inlet flow rate regulating module, a pressure-reducing device, and an outlet flow rate regulating module are sequentially installed. The method for controlling the water output of the countertop water purifier includes: when the countertop water purifier is powered on, if a signal is received... When a user issues a water outlet command, the switch module is activated; the actual pressure value inside the pressure reducing device is acquired; when the switch module is activated and water is flowing from the terminal outlet pipe, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after activation, are controlled in stages according to the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so that the actual pressure value inside the pressure reducing device is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device; if a user issues a water shut-off command, the switch module is deactivated; after the switch module is deactivated, the opening and closing of the outlet flow regulating module is controlled with a delay to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal outlet pipe.

[0006] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are controlled in stages according to the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so as to keep the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: when the switch module is turned on and water is flowing from the terminal outlet pipe, recording the actual pressure value inside the pressure reducing device obtained at the time the switch module is turned on as the pressure reducing device value. The initial internal pressure value is set; based on the initial internal pressure value and the target internal pressure value of the pressure reducing device, the current water and air storage mode inside the pressure reducing device is determined; the current water and air storage mode inside the pressure reducing device refers to the current ratio of water to air inside the pressure reducing device; based on the current water and air storage mode inside the pressure reducing device, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are controlled in the first stage to keep the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device.

[0007] In some embodiments, the current water and air storage mode inside the pressure-reducing device includes any of the following states: a water shortage mode where water is less than air in the current water-to-air ratio inside the pressure-reducing device; a standard mode where the water-to-air ratio is balanced in the current water-to-air ratio inside the pressure-reducing device; and an overflow mode where water is more than air in the current water-to-air ratio inside the pressure-reducing device. Determining the current water and air storage mode inside the pressure-reducing device based on the initial pressure value and the target pressure value inside the pressure-reducing device includes: if the initial pressure value inside the pressure-reducing device is less than the target pressure value inside the pressure-reducing device... The difference between the pressure value and the set pressure deviation value determines the current water and air storage mode inside the pressure reducing device as the water shortage mode; if the initial pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value, and less than the sum of the target pressure value and the set pressure deviation value, then the current water and air storage mode inside the pressure reducing device is determined as the standard mode; if the initial pressure value inside the pressure reducing device is greater than or equal to the sum of the target pressure value and the set pressure deviation value, then the current water and air storage mode inside the pressure reducing device is determined as the overflow mode.

[0008] In some embodiments, based on the current water and air storage mode inside the pressure reducing device, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as their opening degree after opening, are controlled in the first stage to maintain the actual pressure value inside the pressure reducing device within a set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: controlling the inlet flow regulating module to open and controlling the opening degree of the inlet flow regulating module to be the default initial opening degree of the inlet flow regulating module; simultaneously, controlling the outlet flow regulating module to open and controlling the opening degree of the outlet flow regulating module to be the default initial opening degree of the outlet flow regulating module; after a set maintenance time, based on the current water and air storage mode inside the pressure reducing device, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as their opening degree after opening, are controlled in a closed loop to maintain the actual pressure value inside the pressure reducing device within a set pressure deviation range of the target pressure value inside the pressure reducing device.

[0009] In some embodiments, the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, are controlled in a closed loop according to the current water and air storage mode inside the pressure reducing device, so as to maintain the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: if the current water and air storage mode inside the pressure reducing device is the water shortage mode, then controlling the opening degree of the inlet flow rate regulating module to increase at a first set rate, and controlling the outlet flow rate regulating module to close; then, the actual pressure value inside the pressure reducing device is recorded as the first current pressure value inside the pressure reducing device. After the first current pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, the opening degree of the inlet flow regulating module is controlled to maintain the current opening degree of the inlet flow regulating module, and the opening degree of the outlet flow regulating module is controlled to be the current opening degree of the inlet flow regulating module; if the current storage mode of water and air inside the pressure reducing device is the standard mode, and the initial pressure value inside the pressure reducing device is still greater than or equal to the target pressure value inside the pressure reducing device. If the difference between the pressure and the set pressure deviation value is less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, then the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, are finely adjusted and controlled. Specifically, the actual pressure value inside the pressure reducing device is recorded as the second current pressure value inside the pressure reducing device. Then, if the second current pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and is less than the target pressure value inside the pressure reducing device, the opening degree of the inlet flow rate regulating module is controlled to increase at a second set rate, and the outlet flow rate is controlled to... The opening degree of the flow regulation module is maintained at the current opening degree of the outlet flow regulation module; if the second current pressure value inside the pressure reducing device is greater than or equal to the target pressure value inside the pressure reducing device, and less than the sum of the target pressure value inside the pressure reducing device and the set pressure deviation value, the opening degree of the inlet flow regulation module is controlled to decrease at a second set rate, and the opening degree of the outlet flow regulation module is controlled to maintain the current opening degree of the outlet flow regulation module; if the current storage mode of water and air inside the pressure reducing device is the overflow mode, the opening degree of the outlet flow regulation module is controlled to increase at a first set rate, and the inlet flow regulation module is controlled to close.Then, the actual pressure value inside the pressure reducing device is recorded as the third current pressure value inside the pressure reducing device. If the third current pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, the opening degree of the outlet flow regulating module is controlled to maintain the current opening degree of the outlet flow regulating module, and the inlet flow regulating module is controlled to open, with the opening degree of the inlet flow regulating module being the current opening degree of the outlet flow regulating module.

[0010] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as their opening degree after opening, are controlled in stages according to the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so as to keep the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This further includes: after keeping the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device, controlling the countertop water purifier to enter the water exchange stage; after the countertop water purifier enters the water exchange stage for a set water exchange time, controlling the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as their opening degree after opening, is performed during the water exchange stage. Specifically, the inlet flow regulating module is first controlled to close, and after a set closing time, the outlet flow regulating module is then controlled to close, so as to reduce the actual pressure value inside the pressure reducing device in advance, making the actual pressure value inside the pressure reducing device less than the air pressure outside the outlet of the terminal outlet pipe.

[0011] In some embodiments, during the first stage of controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device, if the current storage mode of water and air inside the pressure reducing device is the standard mode, and the initial pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value, and less than the sum of the target pressure value and the set pressure deviation value, then the first process of finely adjusting and controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the opening degree after opening, and the second process of controlling the countertop water purifier to enter the water exchange stage can be executed in parallel; wherein, during the parallel execution of the first process and the second process, if the time for the countertop water purifier to enter the water exchange stage reaches the set water exchange time, then the second process is executed first.

[0012] In some embodiments, after controlling the switch module to turn off, the opening and closing of the water flow regulating module is delayed to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal water outlet pipe. This includes: after controlling the switch module to turn off, delaying for a set time, and then controlling the water flow regulating module to turn on; after the water flow regulating module turns on for a set time, controlling the water flow regulating module to turn off, to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal water outlet pipe; wherein, during the process of controlling the opening and closing of the inlet flow regulating module and the outlet flow regulating module, and the opening degree after opening, according to the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device in stages, if the water shut-off command is received, the water shut-off command is executed first; during the process of controlling the opening and closing of the water flow regulating module after controlling the switch module to turn off, if the water outlet command is received, the water outlet command is executed first.

[0013] In some embodiments, where the outlet pipe is vertically arranged, the pressure reducing device is located within a predetermined distance below the switch module in the vertical direction; the pressure reducing device has a accommodating cavity capable of accommodating water and / or air; wherein the top end of the accommodating cavity is connected to the pipe where the inlet flow regulating module is located; and the bottom end of the accommodating cavity is connected to the pipe where the outlet flow regulating module is located.

[0014] In conjunction with the above method, another aspect of the present invention provides a water outlet control device for a countertop water purifier, wherein the countertop water purifier has a water outlet pipeline, and a switch module is provided in the water outlet pipeline; the switch module is used to control the opening or closing of the water outlet pipeline; a portion of the water outlet pipeline located behind the switch module is denoted as the terminal water outlet pipeline; a bypass pipeline is provided at the terminal water outlet pipeline, denoted as the bypass pressure reducing branch; the bypass pressure reducing branch is bypassed between the pipeline where the inlet of the terminal water outlet pipeline is located and the pipeline where the outlet is located; along the direction from the switch module to the outlet of the terminal water outlet pipeline, an inlet flow regulating module, a pressure reducing device, and an outlet flow regulating module are sequentially provided on the bypass pressure reducing branch; the water outlet control device of the countertop water purifier includes: a control unit, used to, when the countertop water purifier is powered on, if it receives a water outlet command from the user... The control unit is configured to control the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, based on the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, when the switch module is open and water is flowing from the end outlet pipe, so as to maintain the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device; the control unit is also configured to control the switch module to close if a water-closing command is received from the user; the control unit is also configured to delay the opening and closing of the outlet flow rate regulating module after controlling the switch module to close, so as to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the end outlet pipe.

[0015] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the control unit performs phased control on / off of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after turning on, based on the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so as to maintain the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: when the switch module is turned on and water is flowing from the terminal outlet pipe, recording the actual pressure value inside the pressure reducing device obtained at the time the switch module is turned on as the target pressure value. The initial pressure value inside the pressure reducing device is determined; based on the initial pressure value and the target pressure value inside the pressure reducing device, the current water and air storage mode inside the pressure reducing device is determined; the current water and air storage mode inside the pressure reducing device refers to the current ratio of water to air inside the pressure reducing device; based on the current water and air storage mode inside the pressure reducing device, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are controlled in the first stage to keep the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device.

[0016] In some embodiments, the current water and air storage mode inside the pressure-reducing device includes any of the following states: a water shortage mode where water is less than air in the current water-to-air ratio inside the pressure-reducing device; a standard mode where the water-to-air ratio is balanced in the current water-to-air ratio inside the pressure-reducing device; and an overflow mode where water is more than air in the current water-to-air ratio inside the pressure-reducing device. The control unit determines the current water and air storage mode inside the pressure-reducing device based on the initial pressure value inside the pressure-reducing device and the target pressure value inside the pressure-reducing device, including: if the initial pressure value inside the pressure-reducing device is less than the target pressure value inside the pressure-reducing device... If the difference between the target pressure value and the set pressure deviation value is used to determine the current water and air storage mode inside the pressure reducing device, it is determined to be the water shortage mode. If the initial pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value, and less than the sum of the target pressure value and the set pressure deviation value, it is determined to be the standard mode. If the initial pressure value inside the pressure reducing device is greater than or equal to the sum of the target pressure value and the set pressure deviation value, it is determined to be the overflow mode.

[0017] In some embodiments, the control unit, based on the current water and air storage mode inside the pressure reducing device, performs a first-stage control on the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, to maintain the actual pressure value inside the pressure reducing device within a set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: controlling the inlet flow regulating module to open and controlling the opening degree of the inlet flow regulating module to be the default initial opening degree of the inlet flow regulating module; simultaneously, controlling the outlet flow regulating module to open and controlling the opening degree of the outlet flow regulating module to be the default initial opening degree of the outlet flow regulating module; after a set maintenance time, performing closed-loop control on the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, based on the current water and air storage mode inside the pressure reducing device, to maintain the actual pressure value inside the pressure reducing device within a set pressure deviation range of the target pressure value inside the pressure reducing device.

[0018] In some embodiments, the control unit performs closed-loop control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the opening degree after opening, according to the current water and air storage mode inside the pressure reducing device, so as to maintain the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This includes: if the current water and air storage mode inside the pressure reducing device is the water shortage mode, controlling the opening degree of the inlet flow rate regulating module to increase at a first set rate, and controlling the outlet flow rate regulating module to close; then, recording the actual pressure value inside the pressure reducing device as the first pressure value inside the pressure reducing device. If the initial pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value, and less than the sum of the target pressure value and the set pressure deviation value, then the opening degree of the inlet flow regulating module is maintained at its current opening degree, and the outlet flow regulating module is opened, with its opening degree being the current opening degree of the inlet flow regulating module. If the current water and air storage mode inside the pressure reducing device is the standard mode, and the initial pressure value inside the pressure reducing device is still greater than or equal to the target pressure value inside the pressure reducing device... If the difference between the pressure value and the set pressure deviation value is less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, then the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are finely adjusted and controlled. Specifically, the actual pressure value inside the pressure reducing device is recorded as the second current pressure value inside the pressure reducing device. Then, if the second current pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and is less than the target pressure value inside the pressure reducing device, the opening degree of the inlet flow regulating module is controlled to increase at a second set rate, and the outlet flow regulating module is controlled to... The opening degree of the water flow regulating module is maintained at the current opening degree of the outlet water flow regulating module; if the second current pressure value inside the pressure reducing device is greater than or equal to the target pressure value inside the pressure reducing device, and less than the sum of the target pressure value inside the pressure reducing device and the set pressure deviation value, the opening degree of the inlet water flow regulating module is controlled to decrease at a second set rate, and the opening degree of the outlet water flow regulating module is controlled to maintain the current opening degree of the outlet water flow regulating module; if the current storage mode of water and air inside the pressure reducing device is the overflow mode, the opening degree of the outlet water flow regulating module is controlled to increase at a first set rate, and the inlet water flow regulating module is controlled to close.Then, the actual pressure value inside the pressure reducing device is recorded as the third current pressure value inside the pressure reducing device. If the third current pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, the opening degree of the outlet flow regulating module is controlled to maintain the current opening degree of the outlet flow regulating module, and the inlet flow regulating module is controlled to open, with the opening degree of the inlet flow regulating module being the current opening degree of the outlet flow regulating module.

[0019] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the control unit performs phased control on the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, based on the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, so as to keep the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device. This further includes: after keeping the actual pressure value inside the pressure reducing device within the set pressure deviation range of the target pressure value inside the pressure reducing device, controlling the countertop water purifier to enter the water exchange stage; after the countertop water purifier enters the water exchange stage for a set water exchange time, controlling the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, to perform water exchange stage control. Specifically, this involves first controlling the inlet flow regulating module to close, setting a closing time, and then controlling the outlet flow regulating module to close, so as to reduce the actual pressure value inside the pressure reducing device in advance, making the actual pressure value inside the pressure reducing device less than the air pressure outside the outlet of the terminal outlet pipe.

[0020] In some embodiments, the control unit is further configured to, in the first stage of controlling the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, according to the current storage mode of water and air inside the pressure reducing device, if the current storage mode of water and air inside the pressure reducing device is the standard mode, and the initial pressure value inside the pressure reducing device is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device, then the first process of finely adjusting and controlling the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, can be executed in parallel with the second process of controlling the countertop water purifier to enter the water exchange stage; wherein, the control unit is further configured to, during the parallel execution of the first process and the second process, prioritize executing the second process if the time for the countertop water purifier to enter the water exchange stage reaches the set water exchange time.

[0021] In some embodiments, the control unit, after controlling the switch module to turn off, delays the opening and closing of the water flow regulating module to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal water outlet pipe. This includes: after controlling the switch module to turn off, delaying for a set time before controlling the water flow regulating module to turn on; and after the water flow regulating module has turned on for a set time, controlling the water flow regulating module to turn off, to ensure that the actual pressure value inside the pressure reducing device is less than the air pressure outside the outlet of the terminal water outlet pipe. Furthermore, the control unit is also configured to, during the process of performing phased control of the opening and closing of the inlet flow regulating module and the outlet flow regulating module, and the opening degree after opening, based on the actual pressure value inside the pressure reducing device and the target pressure value inside the pressure reducing device, prioritize executing the water-closing command if it receives the water-closing command. The control unit is also configured to, during the process of delaying the opening and closing of the outlet flow regulating module after controlling the switch module to turn off, prioritize executing the water-discharging command if it receives the water-discharging command.

[0022] In some embodiments, when the outlet pipe is vertically arranged, the pressure reducing device is located within a set distance below the switch module in the vertical direction; the pressure reducing device has a receiving cavity that can contain water and / or air; wherein, the top end of the receiving cavity is connected to the pipe where the inlet flow regulating module is located; and the bottom end of the receiving cavity is connected to the pipe where the outlet flow regulating module is located.

[0023] In conjunction with the above-mentioned device, the present invention further provides a countertop water purifier, including: the water outlet control device of the countertop water purifier described above.

[0024] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the water output control method of the countertop water purifier described above.

[0025] Therefore, the solution of the present invention, for the water outlet pipeline of the countertop water purifier, sets a bypass pressure reducing branch at the rear end of the outlet pipeline of the shut-off valve 1 in the water outlet pipeline of the countertop water purifier. In the bypass pressure reducing branch, from the inlet to the outlet, an inlet throttling valve 2, a pressure reducing device 4, and an outlet throttling valve 3 are sequentially arranged. When the countertop water purifier is powered on and the user presses the button to dispense water, after the shut-off valve 1 is opened, the opening and closing of the inlet throttling valve 2 and the outlet throttling valve 3, and their opening degree after opening, are controlled in stages according to the current pressure inside the pressure reducing device 4. This ensures that the current storage mode of water and air inside the pressure reducing device 4 is maintained in the standard mode, that is, the current pressure inside the pressure reducing device 4 is maintained within the set pressure difference range of the target pressure value inside the pressure reducing device 4. Furthermore, when the user presses the button to turn off the water, the shut-off valve 1... After being closed, the delayed-control outlet throttle valve 3 opens to allow some of the water adsorbed at the outlet pipe behind the shut-off valve 1 to enter the pressure reducing device 4, thus achieving internal and external pressure balance within the pressure reducing device 4. The outlet throttle valve 3 is opened for a certain period of time before being closed again, so that the pressure value in the outlet pipe behind the shut-off valve 1 reaches equilibrium with the outside, preventing water droplets from falling out after the button is pressed to turn off the water. Thus, by setting a bypass pressure reducing branch in the outlet pipe behind the shut-off valve 1 of the countertop water purifier, and setting a pressure reducing device 4 in this bypass pressure reducing branch, the pressure value in the outlet pipe behind the shut-off valve 1 reaches equilibrium with the outside after the button is pressed to turn off the water, thereby preventing water droplets from falling from the outlet of the countertop water purifier after the button is pressed to turn off the water and forming water stains, which is beneficial to improving the user experience.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0028] Figure 1 This is a schematic flowchart of an embodiment of the water outlet control method for a countertop water purifier of the present invention;

[0029] Figure 2This is a schematic flowchart of an embodiment of the method of the present invention, which controls the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, in stages according to the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4.

[0030] Figure 3 This is a flowchart illustrating an embodiment of the method of the present invention, which controls the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, according to the current storage mode of water and air inside the pressure reducing device 4.

[0031] Figure 4 This is a schematic flowchart of an embodiment of the control process during the water exchange stage in the method of the present invention;

[0032] Figure 5 This is a flowchart illustrating an embodiment of the delayed control of the opening and closing of the outlet flow rate adjustment module in the method of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of an embodiment of the water outlet control device of the tabletop water purifier of the present invention;

[0034] Figure 7 This is a schematic flowchart of an embodiment of a pressure reduction control device for the outlet pipe of a tabletop water purifier according to the present invention.

[0035] Figure 8 This is a schematic flowchart of an embodiment of a pressure reduction control method for the outlet pipe of a countertop water purifier according to the present invention.

[0036] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0037] 1-Stop valve; 2-Inlet throttle valve; 3-Outlet throttle valve; 4-Pressure reducing device; 5-Pressure sensor; 102-Acquisition unit; 104-Control unit. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0039] Considering that users of countertop water purifiers often find that even after pressing the shut-off button after filling the container with water, water continues to drip, sometimes a few drops at a time. This creates a small puddle on the countertop, requiring frequent wiping and causing inconvenience and negatively impacting the user experience. If a system could be designed so that no water drips after pressing the shut-off button, the user experience would be significantly improved. Therefore, the present invention proposes a water outlet control method for a countertop water purifier, specifically a pressure reduction control method for the water outlet pipe of a countertop water purifier. By adding a pressure reducing device 4 to the water outlet pipe of the countertop water purifier, when the user turns off the water by pressing the water-off button after filling the pipe, the control program of the countertop water purifier is linked to activate the pressure reducing device 4, making the air pressure inside the water outlet pipe of the countertop water purifier lower than the air pressure outside the water outlet of the countertop water purifier. This creates a negative pressure inside the water outlet pipe of the countertop water purifier, ultimately adsorbing the water inside the water outlet pipe and preventing water droplets from continuing to drip out. This avoids water droplets continuing to drip after the user turns off the water by pressing the water-off button, which would affect the user experience and thus improve the user experience.

[0040] According to an embodiment of the present invention, a method for controlling the water output of a countertop water purifier is provided, such as... Figure 1 The diagram shows a flowchart of an embodiment of the method of the present invention. The countertop water purifier has a water outlet pipe, in which a switch module, such as a shut-off valve 1, is installed. The switch module controls the opening or closing of the water outlet pipe. When the switch module is open, water from the countertop water purifier is allowed to be output from the water outlet pipe; when the switch module is closed, water from the countertop water purifier is prohibited from being output from the water outlet pipe. The portion of the water outlet pipe located behind the switch module is designated as the terminal water outlet pipe. This terminal water outlet pipe is the opposite of the portion of the water outlet pipe located behind the switch module. The water outlet pipeline also includes a portion of the water outlet pipeline located at the front end of the switch module; at the end of the water outlet pipeline, a bypass pipeline is provided, referred to as the bypass pressure reducing branch; the bypass pressure reducing branch is bypassed between the pipeline where the inlet of the end water outlet pipeline is located and the pipeline where the outlet is located; on the bypass pressure reducing branch, along the direction from the switch module to the outlet of the end water outlet pipeline, an inlet flow regulating module, a pressure reducing device 4 and an outlet flow regulating module are sequentially provided, such as an inlet throttle valve 2 and an outlet flow regulating module 3.

[0041] Specifically, Figure 7 This is a schematic flowchart illustrating an embodiment of a pressure reduction control method for the outlet pipe of a countertop water purifier according to the present invention. Figure 7The countertop water purifier shown has an outlet pipe, and a shut-off valve 1 is installed on the outlet pipe. Figure 7 The pressure reduction control method for the outlet pipe of the tabletop water purifier shown includes: bypassing a pressure-reducing branch on the outlet pipe of the tabletop water purifier, denoted as the bypass pressure-reducing branch; the bypass pressure-reducing branch is bypassed between the pipe where the inlet of the terminal outlet pipe is located and the pipe where the outlet is located. This bypass pressure-reducing branch is located on the outlet side of the shut-off valve 1 on the outlet pipe of the tabletop water purifier; and, when the outlet pipe of the tabletop water purifier is vertically arranged, the height of the bypass pressure-reducing branch on the outlet pipe of the tabletop water purifier is lower than the height of the shut-off valve 1 on the outlet pipe of the tabletop water purifier, from top to bottom. On this bypass pressure-reducing branch, along the direction from inlet to outlet, an inlet throttle valve 2, a pressure-reducing device 4, and an outlet throttle valve 3 are sequentially arranged. That is, an inlet throttle valve 2 is installed at the inlet of the bypass pressure-reducing branch, an outlet throttle valve 3 is installed at the outlet of the bypass pressure-reducing branch, and a pressure-reducing device 4 is installed in the pipeline between the inlet and outlet of the bypass pressure-reducing branch. Figure 7 In the example shown, the shut-off valve 1, installed near the outlet of the countertop water purifier's outlet pipe, is used to control the water flow and shut-off of the countertop water purifier's outlet pipe. The pressure in the pipe between the pressure reducing device 4 and the outlet of the countertop water purifier's outlet pipe is regulated by the inlet throttle valve 2 and the outlet throttle valve 3 under the control of the countertop water purifier's control program, so that the water and air inside the pressure reducing device 4 form a pressure within a certain range.

[0042] In the case where the water outlet pipe is vertically installed, the pressure reducing device 4 is located within a predetermined distance below the switch module in the vertical direction; the connection point between the pipe where the inlet flow regulating module is located and the end water outlet pipe has a first predetermined distance from the switch module; the connection point between the pipe where the inlet flow regulating module is located and the end water outlet pipe has a second predetermined distance from the outlet of the end water outlet pipe, and the second predetermined distance is greater than the first predetermined distance.

[0043] exist Figure 7In the example shown, the pressure reducing device 4 can be cylindrical. This cylindrical pressure reducing device 4 is bypassed and positioned at the outlet of the countertop water purifier's outlet pipe, slightly below the shut-off valve 1. The specific position of the bypass pressure reducing branch below the shut-off valve 1 can be determined based on the spatial layout of the countertop water purifier's outlet pipe. For example, taking the countertop water purifier model RJY-T16-1X611B as an example, the bypass pressure reducing branch is positioned 2cm to 5cm below the shut-off valve 1. This precisely and reliably prevents water droplets from forming water stains when the user operates a switch button (such as the water outlet button on the countertop water purifier's touchscreen) to turn off the water. Because the pressure reducing device 4 is located slightly below the shut-off valve 1, the shut-off valve 1 can be used to control the opening and closing of the water outlet pipe of the water purifier and the inlet of the pressure reducing device 4; that is, by placing the pressure reducing device 4 slightly below the shut-off valve 1, two water circuits can be controlled through the shut-off valve 1: one water circuit is... Figure 7 The vertically arranged water outlet pipe shown is connected to the inlet water pipe of the bypass pressure-reducing branch where the pressure-reducing device 4 is located. In this invention, a pressure-reducing device 4 is installed in the water outlet pipe of the countertop water purifier. The pressure-reducing device 4 is connected to the end of the water outlet pipe of the countertop water purifier. The pressure-reducing device 4 controls the switch via a regulating valve. When the user turns off the water (i.e., the user turns off the water after filling the pipe), the control program of the countertop water purifier controls the regulating valve (i.e., the water outlet throttle valve 3) of the pressure-reducing device 4 to open, making the air pressure inside the water outlet pipe of the countertop water purifier lower than the air pressure outside the water outlet of the countertop water purifier. This creates a negative pressure inside the water outlet pipe of the countertop water purifier, ultimately adsorbing the water in the water outlet pipe of the countertop water purifier and preventing it from dripping out.

[0044] The pressure reducing device 4 has a accommodating cavity that can hold water and / or air; wherein, the top end of the accommodating cavity is connected to the pipeline where the inlet flow rate regulating module is located; and the bottom end of the accommodating cavity is connected to the pipeline where the outlet flow rate regulating module is located.

[0045] exist Figure 7 In the example shown, the cylindrical pressure-reducing device 4 has a sealed cylindrical cavity; an inlet pipe is connected to the top of the cylindrical cavity, which connects to the pipeline where the inlet throttle valve 2 is located; an outlet pipe is connected to the bottom of the cylindrical cavity, which connects to the pipeline where the outlet throttle valve 3 is located; the cylindrical cavity, as well as the inlet and outlet pipes of the cylindrical cavity, are located in the bypass pipeline of the outlet pipeline below the shut-off valve 1 of the tabletop water purifier. Alternatively, the structure of the cylindrical pressure-reducing device 4 can be similar to that of a drip in an IV tubing.

[0046] In the solution of this invention, the control process of the pressure reducing device 4 includes: when the user operates the switch button of the countertop water purifier (such as the water outlet button on the touch screen of the countertop water purifier) ​​to dispense water, the control program of the countertop water purifier first determines the current state inside the pressure reducing device 4 based on the pressure sensor 5 inside the pressure reducing device 4, controls the control valve (such as the shut-off valve 1) of the water outlet pipeline of the countertop water purifier to open, and then controls the valves of the pressure reducing device 4 (i.e., the inlet throttling valve 2 at the front end of the bypass pressure reducing branch where the pressure reducing device 4 is located, and the outlet throttling valve 3 at the rear end of the bypass pressure reducing branch where the pressure reducing device 4 is located) to open, so that the water in the pressure reducing device 4 keeps circulating; when the user operates the switch button When turning off the water (such as the water outlet button on the touch screen of a countertop water purifier), the control program of the countertop water purifier first controls the valve of the pressure reducing device 4 (i.e., the inlet throttle valve at the front end of the bypass pressure reducing branch where the pressure reducing device 4 is located, and the outlet throttle valve 3 at the rear end of the bypass pressure reducing branch where the pressure reducing device 4 is located) to close, and then controls the control valve of the water outlet pipe of the countertop water purifier (such as the shut-off valve 1) to close, so that the air pressure in the pressure reducing device 4 is lower than the air pressure outside the countertop water purifier. At the same time, the pressure reducing device 4 is connected to the water outlet of the water outlet pipe of the countertop water purifier, thereby forming an adsorption force inside the water outlet pipe of the countertop water purifier, so that the water in the water outlet of the water outlet pipe of the countertop water purifier will not drip out.

[0047] like Figure 1 As shown, the water output control method of the countertop water purifier of the present invention includes steps S110 to S150.

[0048] In step S110, when the countertop water purifier is powered on, if a water dispensing command is received from the user, the water dispensing command is executed. Specifically, the switch module is first turned on to allow water to flow from the terminal water outlet pipe. The water dispensing command is a command used to make the countertop water purifier dispense water, and may specifically be a button-activated water dispensing command.

[0049] In step S120, the actual pressure value inside the pressure-reducing device 4 is obtained. Specifically, in Figure 7 In the example shown, the specific pressure value corresponding to the pressure range formed by the water and air inside the pressure reducing device 4 is detected by the pressure sensor 5 built into the pressure reducing device 4.

[0050] In step S130, when the switch module is turned on and water is flowing from the terminal outlet pipe, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are controlled in stages according to the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, so as to keep the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. Specifically, the pressure reducing device 4 has a built-in pressure sensor 5, and the pressure value P0 detected when the shut-off valve 1 opens upon receiving the user's button water outlet command is taken as the initial value of the pressure value inside the pressure reducing device 4, and the target pressure value of the pressure value inside the pressure reducing device 4 is set to P. 目标 The target pressure value P 目标 The size of the pressure reducing device 4 can be determined based on its structure. It only needs to be able to generate negative pressure inside the pressure reducing device 4 when the user presses the button to turn off the water, so as to absorb the water droplets at the outlet of the water pipe of the tabletop water purifier.

[0051] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, are controlled in stages according to the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, so as to keep the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. For the specific process, please refer to the following exemplary description.

[0052] The following is combined Figure 2 The illustrated flowchart shows an embodiment of the method of the present invention, which performs phased control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module based on the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, and the opening degree after opening. The flowchart further illustrates the specific process of performing phased control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module based on the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, including steps S210 to S230.

[0053] In step S210, when the switch module is turned on and water is flowing from the end outlet pipe, the actual pressure value inside the pressure reducing device 4 obtained at the moment the switch module is turned on is recorded as the initial pressure value inside the pressure reducing device 4.

[0054] Step S220: When the switch module is turned on and water is flowing from the end outlet pipe, determine the current storage mode of water and air inside the pressure reducing device 4 based on the initial pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4; the current storage mode of water and air inside the pressure reducing device 4 refers to the current ratio of water and air inside the pressure reducing device 4.

[0055] Step S230: Based on the current water and air storage mode inside the pressure reducing device 4, the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are controlled in the first stage to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. The first stage of control is equivalent to the control stage A of the throttle valve.

[0056] Specifically, Figure 8 This is a schematic flowchart illustrating an embodiment of a pressure reduction control method for the outlet pipe of a countertop water purifier according to the present invention. Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, comprising:

[0057] Step 1: With the countertop water purifier powered on, determine if the user's button-operated water dispensing command has been received. If yes, proceed to Step 2 to open the shut-off valve 1 and obtain the internal pressure value of the pressure reducing device 4; otherwise, continue waiting in Step 1. The countertop water purifier has a button, which can be a touch button. If the user clicks or touches this touch button when the countertop water purifier is not dispensing water, it is considered that the countertop water purifier has received the user's button-operated water dispensing command.

[0058] Step 2: If a user's button water dispensing command is received, the shut-off valve 1 is opened, and the detection value of the pressure sensor 5 is obtained to obtain the pressure value inside the pressure reducing device 4. Then, step 3 is executed to determine the current storage mode of water and air inside the pressure reducing device 4 based on the pressure value inside the pressure reducing device 4.

[0059] In some embodiments, the current water and air storage mode inside the pressure reducing device 4 includes any of the following states: a water shortage mode in which water is less than air in the current water and air ratio inside the pressure reducing device 4; a standard mode in which the water and air ratio inside the pressure reducing device 4 is balanced; and an overflow mode in which water is more than air in the current water and air ratio inside the pressure reducing device 4.

[0060] In step S220, when the switch module is turned on and water is flowing from the terminal outlet pipe, the current storage mode of water and air inside the pressure reducing device 4 is determined based on the initial pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, including any of the following determination scenarios:

[0061] The first determination scenario: If the initial pressure value inside the pressure reducing device 4 is less than the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then the current storage mode of water and air inside the pressure reducing device 4 is determined to be the water shortage mode.

[0062] The second determination scenario: If the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then the current storage mode of water and air inside the pressure reducing device 4 is determined to be the standard mode.

[0063] The third determination scenario: If the initial pressure value inside the pressure reducing device 4 is greater than or equal to the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then the current storage mode of water and air inside the pressure reducing device 4 is determined to be the overflow mode.

[0064] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0065] Step 3: Determine the current water and air storage mode inside the pressure reducing device 4 based on the internal pressure value. Then, execute Step 4 to control the water output stage of the countertop water purifier based on the current water and air storage mode inside the pressure reducing device 4. Step 3, determining the current water and air storage mode inside the pressure reducing device 4 based on the internal pressure value, specifically includes any one of steps 31, 32, and 33.

[0066] Step 31: When the detected initial pressure value P0 inside the pressure reducing device 4 is less than the set target pressure value P inside the pressure reducing device 4... 目标 - If a pressure value X is set, the current storage mode of water and air inside the pressure reducing device 4 is determined to be that the pressure reducing device 4 is in a water shortage mode.

[0067] Step 32: When the detected target pressure value P - set pressure value X ≤ detected initial pressure value P0 inside pressure reducing device 4 < set target pressure value P inside pressure reducing device 4 目标 + Set pressure value X, then determine the current storage mode of water and air inside pressure reducing device 4 as standard mode.

[0068] Step 33: When the detected initial pressure value P0 inside the pressure reducing device 4 is greater than or equal to the set target pressure value P inside the pressure reducing device 4. 目标 If a pressure value X is set, the current storage mode of water and air inside the pressure reducing device 4 is determined to be that the pressure reducing device 4 is in overflow mode. Here, the set pressure value X is the deviation threshold of the standard mode pressure value.

[0069] Step 4: Upon receiving a user's button command to dispense water from the countertop water purifier, the control program of the countertop water purifier enters the water dispensing stage. The control program first controls the shut-off valve 1 to open. With shut-off valve 1 open and water flowing from the countertop water purifier's outlet pipe, the water dispensing stage is controlled according to the current water and air storage mode inside the pressure reducing device 4. Specifically, the control of the inlet throttle valve 2 and the outlet throttle valve 3 is executed based on the current water and air storage mode inside the pressure reducing device 4. This specifically involves executing the throttle valve control stage A. Afterwards, Step 5 can be executed to control the water exchange stage.

[0070] In some embodiments, step S230 involves controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. For details, please refer to the following exemplary description.

[0071] The following is combined Figure 3 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention, which controls the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module according to the current storage mode of water and air inside the pressure reducing device 4, and the opening degree after opening. It further illustrates the specific process of controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module according to the current storage mode of water and air inside the pressure reducing device 4, and the opening degree after opening in the first stage, including steps S310 to S320.

[0072] Step S310: Control the inlet flow rate adjustment module to turn on, and control the opening degree of the inlet flow rate adjustment module to the default initial opening degree of the inlet flow rate adjustment module; at the same time, control the outlet flow rate adjustment module to turn on, and control the opening degree of the outlet flow rate adjustment module to the default initial opening degree of the outlet flow rate adjustment module.

[0073] Step S320: After setting the maintenance time, based on the current water and air storage mode inside the pressure reducing device 4, closed-loop control is performed on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, so that the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. The set maintenance time is, for example, time t0.

[0074] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes: in step 4, the process of executing the control of the throttle valve in stage A includes:

[0075] Step 41: Open the inlet throttle valve 2 to the opening degree P. 进 At the same time, open the outlet throttle valve 3 to the opening degree P. 出 Among them, the opening degree P 进 and opening degree P 出 The default initial opening is recommended to be half of the maximum opening of the corresponding valve. When the inlet throttle valve 2 and the outlet throttle valve 3 are both opened to their respective default initial openings and maintained for a time t0, step 42 is executed, that is, the closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 is entered. In other words, the closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 is performed according to the current storage mode of water and air inside the pressure reducing device 4.

[0076] Step 42: Perform closed-loop control on the inlet throttle valve 2 and the outlet throttle valve 3 according to the current storage mode of water and air inside the pressure reducing device 4. Specifically, this may include any one of steps 421, 422 and 423.

[0077] In some embodiments, step S320 involves closed-loop control of the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, including any of the following closed-loop control scenarios:

[0078] The first closed-loop control scenario: If the current water and air storage mode inside the pressure reducing device 4 is the water shortage mode, then the opening degree of the inlet flow rate regulating module is increased at a first set rate, and the outlet flow rate regulating module is closed. Then, the actual pressure value inside the pressure reducing device 4 is recorded as the first current pressure value inside the pressure reducing device 4. After satisfying the condition that the first current pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, the opening degree of the inlet flow rate regulating module is maintained at the current opening degree, and the outlet flow rate regulating module is opened, with its opening degree being the current opening degree of the inlet flow rate regulating module. Wherein, the first set rate is, for example, a rate in mP / s. The first current pressure value is, for example, a current pressure value P1.

[0079] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 421, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current water and air storage mode inside the pressure reducing device 4, if the current water and air storage mode inside the pressure reducing device 4 is that the pressure reducing device 4 is in a water shortage mode, then: the control program of the countertop water purifier controls the opening of the inlet throttle valve 2 to increase at a rate of mP / s and controls the outlet throttle valve 3 to close. The rate mP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a value range of 10P / s to 60P / s is recommended. Furthermore, after adjusting the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the pressure sensor 5 detects that the current pressure value P1 inside the pressure reducing device 4 satisfies: P 目标 -X≤P1<P 目标 +X controls the inlet throttle valve 2 to maintain its current opening, and controls the outlet throttle valve 3 to quickly open to the same opening as the inlet throttle valve 2, so that the current pressure value P1 inside the pressure reducing device 4 is maintained at P. 目标 -X≤P1<P 目标 +X.

[0080] The second closed-loop control scenario: If the current storage mode of water and air inside the pressure reducing device 4 is the standard mode, and the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value, and less than the sum of the target pressure value and the set pressure deviation value, then the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, are finely adjusted and controlled. Specifically, the actual pressure value inside the pressure reducing device 4 is recorded as the second current pressure value inside the pressure reducing device 4. Then, if the second current pressure value inside the pressure reducing device 4 is greater than or equal to the initial pressure value, the initial pressure value inside the pressure reducing device 4 is recorded as the second current pressure value inside the pressure reducing device 4. If the difference between the target pressure value inside pressure reducing device 4 and the set pressure deviation value is less than the target pressure value inside pressure reducing device 4, the opening of the inlet flow regulating module is increased at a second set rate, and the opening of the outlet flow regulating module is maintained at its current opening. If the second current pressure value inside pressure reducing device 4 is greater than or equal to the target pressure value inside pressure reducing device 4, and less than the sum of the target pressure value inside pressure reducing device 4 and the set pressure deviation value, the opening of the inlet flow regulating module is decreased at a second set rate, and the opening of the outlet flow regulating module is maintained at its current opening. Wherein, the second set rate is, for example, a rate nP / s. The second current pressure value is, for example, a current pressure value P2.

[0081] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 422, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current storage mode of water and air inside the pressure reducing device 4, if the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in standard mode, and the initial pressure value P0 detected by the pressure sensor 5 inside the pressure reducing device 4 satisfies P... 目标 -X≤P0<P 目标 +X, then the control program of the tabletop water purifier will finely adjust the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3.

[0082] In the process of fine-tuning the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the detected current pressure value P2 inside the pressure reducing device 4 satisfies P... 目标 -X≤P2<P 目标 The control program of the tabletop water purifier controls the opening of the inlet throttle valve 2 to increase at a rate of nP / s, while the opening of the outlet throttle valve 3 remains at the current opening.

[0083] During the process of fine-tuning the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the detected current pressure value P2 inside the pressure reducing device 4 meets P 目标 ≤P2<P 目标 +X indicates that the control program of the countertop water purifier controls the opening of the inlet throttle valve 2 to decrease at a rate of nP / s, and controls the opening of the outlet throttle valve 3 to maintain the current opening. The rate nP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a value range of 1P / s to 5P / s is recommended.

[0084] The third closed-loop control scenario: If the current storage mode of water and air inside the pressure reducing device 4 is the overflow mode, then the opening degree of the outlet flow rate regulating module is increased at a first set rate, and the inlet flow rate regulating module is closed. Then, the actual pressure value inside the pressure reducing device 4 is recorded as the third current pressure value inside the pressure reducing device 4. After the third current pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, the opening degree of the outlet flow rate regulating module is maintained at its current opening degree, and the inlet flow rate regulating module is opened, with its opening degree being the current opening degree of the outlet flow rate regulating module. Wherein, the first set rate is, for example, a rate in mP / s. The third current pressure value is, for example, a current pressure value P3.

[0085] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 423, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current water and air storage mode inside the pressure reducing device 4, if the current water and air storage mode inside the pressure reducing device 4 is that the pressure reducing device 4 is in overflow mode, then: the control program of the countertop water purifier controls the opening of the outlet throttle valve 3 to increase at a rate of mP / s, and controls the inlet throttle valve 2 to close. The rate mP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a value range of 10P / s to 60P / s is recommended. Furthermore, after adjusting the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the pressure sensor 5 detects the current pressure value P3 inside the pressure reducing device 4 that satisfies P... 目标 -X≤P3<P 目标 +X controls the outlet throttle valve 3 to maintain its current opening, and controls the inlet throttle valve 2 to quickly open to the same opening as the outlet throttle valve 3, so that the current pressure value P3 inside the pressure reducing device 4 is maintained at P. 目标 -X≤P3<P 目标 +X.

[0086] In some embodiments, step S130, when the switch module is turned on and water is flowing from the terminal outlet pipe, involves staged control of the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, based on the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, so as to keep the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. It also includes a water exchange stage control process.

[0087] The following is combined Figure 4 The schematic diagram shows an embodiment of the control process of the water exchange stage in the method of the present invention. The specific process of the control process of the water exchange stage is further explained, including steps S410 to S420.

[0088] Step S410: After performing a first-stage control on the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device 4, or during the first-stage control process of performing a first-stage control on the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, so that the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, that is, after the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, the countertop water purifier is controlled to enter the water exchange stage, that is, the countertop water purifier is controlled to execute the preset control logic of the water exchange stage, and the time for the countertop water purifier to enter the water exchange stage is timed.

[0089] Step S420: After the countertop water purifier enters the water exchange stage and the set water exchange time is met, the opening and closing of the inlet flow regulation module and the outlet flow regulation module, as well as the opening degree after opening, are controlled for the water exchange stage. Specifically, the inlet flow regulation module is first controlled to close, and after a set closing time, the outlet flow regulation module is then controlled to close, in order to reduce the actual pressure value inside the pressure reducing device 4 in advance, so that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe. The water exchange time is set as time T0. The closing time is set as time T1.

[0090] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0091] Step 5: Execute the water exchange phase control. Specifically, to ensure that the water stored inside the pressure reducing device 4 always flows out fresh water, the control program of the countertop water purifier must execute the water exchange phase control. In Step 5, when it is determined that the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in standard mode, the control program of the countertop water purifier enters the water exchange phase and starts timing. When the timing time meets time T0, step 6 is executed to execute the throttle valve control phase B.

[0092] Step 6: Control the inlet throttle valve 2 to close for time T1, then control the outlet throttle valve 3 to close. After that, execute step 7 to determine whether the user's button to turn off the water has been received.

[0093] In step 6, because water still flows out at the outlet throttle valve 3 the instant the inlet throttle valve 2 closes, this increases the air volume inside the pressure reducing device 4, thereby reducing the current pressure inside the pressure reducing device 4 to be lower than the external air pressure. Then, the outlet throttle valve 3 is closed to maintain the current pressure inside the pressure reducing device 4 being lower than the external air pressure. The time T0 can be selected based on the storage space of the pressure reducing device 4, as well as the opening degrees of the inlet throttle valve 2 and the outlet throttle valve 3; a value range of 0–10 seconds is recommended. The time T1 can also be selected based on the storage space of the pressure reducing device 4, as well as the opening degrees of the inlet throttle valve 2 and the outlet throttle valve 3; a value range of 0–3 seconds is recommended.

[0094] In some embodiments, in step S230, during the first stage of controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device 4, if the current storage mode of water and air inside the pressure reducing device 4 is the standard mode, and the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then the first process of finely adjusting and controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the opening degree after opening, in step S230, and the second process of controlling the countertop water purifier to enter the water exchange stage can be executed in parallel.

[0095] In the process of executing the first process and the second process in parallel, if the time required for the countertop water purifier to enter the water exchange stage reaches the set water exchange time, then the second process is executed first.

[0096] Specifically, such as Figure 8As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: during actual control, when the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in the standard mode, the opening degree of the inlet throttle valve 2 and the opening degree of the outlet throttle valve 3 are controlled to enter a fine adjustment control process. This process can be parallel to the control of the throttle valve control stage B during the water replacement stage. However, if the timing time at the start of the water replacement stage meets time T0, the control of the throttle valve control stage B during the water replacement stage is executed first.

[0097] In step S140, when the switch module is turned on and water is flowing from the terminal outlet pipe, after controlling the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, in stages according to the actual pressure value inside the pressure reducing device 4, or during the process of controlling the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, in stages according to the actual pressure value inside the pressure reducing device 4, if a water shut-off command is received from the user, the water shut-off command is executed. Specifically, the switch module is first controlled to shut off to prevent water from flowing from the terminal outlet pipe.

[0098] In step S150, after the switch module is turned off, the opening and closing of the water flow regulating module is delayed to ensure that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe, so that no water drips from the outlet of the terminal water outlet pipe after the switch module is turned off. The water shut-off command is used to stop the water from flowing out of the countertop water purifier, specifically it can be a button water shut-off command.

[0099] The present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier. This method involves adding a pressure reducing device 4 to the outlet pipe of the countertop water purifier. A pressure sensor 5 installed inside the pressure reducing device 4 detects the internal pressure, determines the presence and quantity of water within the device, and establishes the current water and air storage mode. The control program of the countertop water purifier then controls the opening and closing sequence of the valves (i.e., the shut-off valve 1, the inlet throttle valve at the front end of the bypass pressure reducing branch containing the pressure reducing device 4, and the outlet throttle valve 3 at the rear end of the bypass pressure reducing branch containing the pressure reducing device 4), thereby creating a pressure difference between the inside of the pressure reducing device 4 (i.e., the pipe containing the pressure reducing device 4) and the outside environment (i.e., the area outside the pipe containing the pressure reducing device 4). Furthermore, when the user turns off the water by pressing the water-off button after filling the tubing, the control program of the countertop water purifier activates the pressure reducing device 4, which in turn opens the outlet throttle valve 3. This connects the tubing containing the pressure reducing device 4 to the outside of the tubing, creating a negative pressure inside the outlet tubing. This negative pressure traps water droplets inside the tubing, preventing them from dripping out. The pressure difference created by this negative pressure prevents water from continuing to drip after the user has finished filling the tubing and turned off the water, thus improving the user experience.

[0100] In some embodiments, after the switch module is turned off in step S150, the opening and closing of the water flow regulating module is delayed to ensure that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the end water pipe. For details of the process, please refer to the following exemplary description.

[0101] The following is combined Figure 5 The flowchart shown is a schematic diagram of an embodiment of the delayed control of the opening and closing of the outlet flow rate regulation module in the method of the present invention. It further illustrates the specific process of delayed control of the opening and closing of the outlet flow rate regulation module in step S150, including steps S510 to S520.

[0102] Step S510: After the switch module is turned off, a set delay time is set before the water flow rate adjustment module is turned on. The set delay time is, for example, time T2.

[0103] Step S520: After the water flow rate regulating module has been turned on for a set time, the water flow rate regulating module is turned off to ensure that the actual pressure inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe. The set time is as shown in time T3.

[0104] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0105] Step 7: Determine if the user's button-to-turn-off command has been received: If yes, proceed to Step 8 to execute the pressure reduction control phase; otherwise, continue waiting in Step 7. The countertop water purifier has a button, which can be a touch button. When the countertop water purifier is dispensing water, if the user clicks or touches this touch button, it is considered that the countertop water purifier has received the user's button-to-turn-off command.

[0106] In step 8, when the user presses the button to turn off the water after filling the container, the countertop water purifier's control program enters the pressure reduction control phase: Upon receiving a water-off command (such as a button-to-turn-off instruction), the countertop water purifier's control program immediately closes the shut-off valve 1, and then, after a delay of T2, quickly opens the outlet throttling valve 3. Because some water still flows out of the outlet pipe behind the shut-off valve 1 at the moment of closing, creating a certain vacuum zone, opening the outlet throttling valve 3, where the current pressure inside the pressure reducing device 4 is lower than the external air pressure, will draw some water from the outlet pipe behind the shut-off valve 1 into the pressure reducing device 4, thus achieving pressure balance within and outside the pressure reducing device 4. The outlet throttling valve 3 is opened for T3 seconds before closing, allowing the pressure in the outlet pipe behind the shut-off valve 1 to reach equilibrium with the external pressure, ensuring that no water drips out after the button is pressed to turn off the water. The time T2 can be selected based on the storage space of the pressure reducing device 4, as well as the opening degrees of the inlet throttling valve 2 and the outlet throttling valve 3; a range of 0 to 3 seconds is recommended. The time T3 can also be selected based on the storage space of the pressure reducing device 4, as well as the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3. It is recommended to take a value range of 0 to 3 seconds.

[0107] Specifically, during the phased control of the opening and closing of the inlet flow regulation module and the outlet flow regulation module, and the degree of opening after opening, based on the actual pressure value and the target pressure value inside the pressure reducing device 4, if the water shut-off command is received, the water shut-off command is executed first. Similarly, during the delayed control of the opening and closing of the outlet flow regulation module after the switch module is turned off, if the outlet flow regulation command is received, the outlet flow regulation command is executed first.

[0108] It should be noted that in the control of each stage in steps 1 to 8 above, the button to dispense water and the button to turn off water have the highest priority. For example, after the button dispenses water, the water exchange control is executed. If the button to turn off water is pressed at this time, the button to turn off water should be executed immediately. When the button is pressed to dispense water again, the control program of the countertop water purifier will re-execute the pressure detection stage, the water exchange stage, and other subsequent logic.

[0109] The solution of this invention, through the pressure reducing device 4 and its control method installed in the water outlet pipe of the countertop water purifier, can achieve precise control of the water droplets at the outlet of the countertop water purifier. This allows the water droplets at the outlet to be quickly locked after the water is turned off by pressing the button, preventing them from dripping out and forming large water stains. Thus, it avoids water droplets falling from the outlet of the countertop water purifier and forming water stains when the user presses the switch button (such as the water outlet button on the touch screen of the countertop water purifier) ​​to turn off the water, ensuring that the countertop water purifier is dry and clean, reducing the user's frequent wiping work, and making it more convenient, faster, cleaner, more hygienic, and safer for the user.

[0110] The technical solution of this embodiment involves setting a bypass pressure-reducing branch at the rear end of the outlet pipe of the countertop water purifier, specifically for the outlet pipe of the countertop water purifier. Within this bypass pressure-reducing branch, from the inlet to the outlet, an inlet throttle valve 2, a pressure-reducing device 4, and an outlet throttle valve 3 are sequentially installed. When the countertop water purifier is powered on and the user presses the button to dispense water, after the control valve 1 opens, the opening and closing of the inlet throttle valve 2 and the outlet throttle valve 3, as well as their opening degree, are controlled in stages based on the current pressure inside the pressure-reducing device 4. This ensures that the current water and air storage mode inside the pressure-reducing device 4 remains in the standard mode, i.e., that the current pressure inside the pressure-reducing device 4 remains within the set pressure difference range of the target pressure value inside the pressure-reducing device 4. Furthermore, when the user presses the button to turn off the water, the control valve... After the valve 1 is closed, the delayed-release control outlet throttle valve 3 opens to allow some of the water adsorbed at the outlet pipe at the rear end of the shut-off valve 1 to enter the pressure reducing device 4, thus achieving internal and external pressure balance within the pressure reducing device 4. The outlet throttle valve 3 is closed after being open for a certain period of time, so that the pressure value in the outlet pipe at the rear end of the shut-off valve 1 reaches equilibrium with the outside, preventing water droplets from falling out after the water is turned off by pressing the button. Thus, by setting a bypass pressure reducing branch in the outlet pipe at the rear end of the shut-off valve 1 in the outlet pipe of the countertop water purifier, and setting a pressure reducing device 4 in the bypass pressure reducing branch, the pressure value in the outlet pipe at the rear end of the shut-off valve 1 reaches equilibrium with the outside after the water is turned off by pressing the button, thereby preventing water droplets from falling out of the outlet pipe of the countertop water purifier after the water is turned off by pressing the button and forming water stains, which is beneficial to improving the user experience.

[0111] According to embodiments of the present invention, a water outlet control device for a countertop water purifier, corresponding to the water outlet control method for a countertop water purifier, is also provided. See also Figure 6The diagram shows a structural schematic of an embodiment of the device of the present invention. The countertop water purifier has a water outlet pipe, in which a switch module, such as a shut-off valve 1, is installed. The switch module controls the opening or closing of the water outlet pipe. When the switch module is open, water from the countertop water purifier is allowed to be output from the water outlet pipe; when the switch module is closed, water from the countertop water purifier is prohibited from being output from the water outlet pipe. The portion of the water outlet pipe located behind the switch module is designated as the terminal water outlet pipe. This terminal water outlet pipe is the opposite of the portion of the water outlet pipe located behind the switch module. The water outlet pipeline also includes a portion of the water outlet pipeline located at the front end of the switch module; at the end of the water outlet pipeline, a bypass pipeline is provided, referred to as the bypass pressure reducing branch; the bypass pressure reducing branch is bypassed between the pipeline where the inlet of the end water outlet pipeline is located and the pipeline where the outlet is located; on the bypass pressure reducing branch, along the direction from the switch module to the outlet of the end water outlet pipeline, an inlet flow regulating module, a pressure reducing device 4 and an outlet flow regulating module are sequentially provided, such as an inlet throttle valve 2 and an outlet flow regulating module 3.

[0112] Specifically, Figure 7 This is a schematic flowchart illustrating an embodiment of a pressure-reducing control device for the outlet pipe of a countertop water purifier according to the present invention. Figure 7 The countertop water purifier shown has an outlet pipe, and a shut-off valve 1 is installed on the outlet pipe. Figure 7 The pressure-reducing control device for the outlet pipe of the tabletop water purifier shown includes: a pressure-reducing branch bypassing the outlet pipe of the tabletop water purifier, denoted as the bypass pressure-reducing branch; the bypass pressure-reducing branch bypasses the inlet pipe and the outlet pipe of the terminal outlet pipe. This bypass pressure-reducing branch is located on the outlet side of the shut-off valve 1 on the outlet pipe of the tabletop water purifier; and, when the outlet pipe of the tabletop water purifier is vertically installed, the height of the bypass pressure-reducing branch on the outlet pipe of the tabletop water purifier is lower than the height of the shut-off valve 1 on the outlet pipe of the tabletop water purifier. Along the direction from inlet to outlet, an inlet throttle valve 2, a pressure-reducing device 4, and an outlet throttle valve 3 are sequentially installed on the bypass pressure-reducing branch. That is, an inlet throttle valve 2 is installed at the inlet of the bypass pressure-reducing branch, an outlet throttle valve 3 is installed at the outlet of the bypass pressure-reducing branch, and a pressure-reducing device 4 is installed in the pipeline between the inlet and outlet of the bypass pressure-reducing branch. Figure 7In the example shown, the shut-off valve 1, installed near the outlet of the countertop water purifier's outlet pipe, is used to control the water flow and shut-off of the countertop water purifier's outlet pipe. The pressure in the pipe between the pressure reducing device 4 and the outlet of the countertop water purifier's outlet pipe is regulated by the inlet throttle valve 2 and the outlet throttle valve 3 under the control of the countertop water purifier's control program, so that the water and air inside the pressure reducing device 4 form a pressure within a certain range.

[0113] When the water outlet pipe is vertically installed, the pressure reducing device 4 is located within a set distance below the switch module in the vertical direction; the connection between the pipe where the inlet flow regulating module is located and the end water outlet pipe is at a first set distance from the switch module; the connection between the pipe where the outlet flow regulating module is located and the end water outlet pipe is at a second set distance from the outlet of the end water outlet pipe, and the second set distance is greater than the first set distance.

[0114] exist Figure 7 In the example shown, the pressure reducing device 4 can be cylindrical. This cylindrical pressure reducing device 4 is bypassed and positioned at the outlet of the countertop water purifier's outlet pipe, slightly below the shut-off valve 1. The specific position of the bypass pressure reducing branch below the shut-off valve 1 can be determined based on the spatial layout of the countertop water purifier's outlet pipe. For example, taking the countertop water purifier model RJY-T16-1X611B as an example, the bypass pressure reducing branch is positioned 2cm to 5cm below the shut-off valve 1. This precisely and reliably prevents water droplets from forming water stains when the user operates a switch button (such as the water outlet button on the countertop water purifier's touchscreen) to turn off the water. Because the pressure reducing device 4 is located slightly below the shut-off valve 1, the shut-off valve 1 can be used to control the opening and closing of the water outlet pipe of the water purifier and the inlet of the pressure reducing device 4; that is, by placing the pressure reducing device 4 slightly below the shut-off valve 1, two water circuits can be controlled through the shut-off valve 1: one water circuit is... Figure 7 The vertically arranged water outlet pipe shown is connected to the inlet water pipe of the bypass pressure-reducing branch where the pressure-reducing device 4 is located. In this invention, a pressure-reducing device 4 is installed in the water outlet pipe of the countertop water purifier. The pressure-reducing device 4 is connected to the end of the water outlet pipe of the countertop water purifier. The pressure-reducing device 4 controls the switch via a regulating valve. When the user turns off the water (i.e., the user turns off the water after filling the pipe), the control program of the countertop water purifier controls the regulating valve (i.e., the water outlet throttle valve 3) of the pressure-reducing device 4 to open, making the air pressure inside the water outlet pipe of the countertop water purifier lower than the air pressure outside the water outlet of the countertop water purifier. This creates a negative pressure inside the water outlet pipe of the countertop water purifier, ultimately adsorbing the water in the water outlet pipe of the countertop water purifier and preventing it from dripping out.

[0115] The pressure reducing device 4 has a accommodating cavity that can hold water and / or air; wherein, the top end of the accommodating cavity is connected to the pipeline where the inlet flow rate regulating module is located; and the bottom end of the accommodating cavity is connected to the pipeline where the outlet flow rate regulating module is located.

[0116] exist Figure 7 In the example shown, the cylindrical pressure-reducing device 4 has a sealed cylindrical cavity; an inlet pipe is connected to the top of the cylindrical cavity, which connects to the pipeline where the inlet throttle valve 2 is located; an outlet pipe is connected to the bottom of the cylindrical cavity, which connects to the pipeline where the outlet throttle valve 3 is located; the cylindrical cavity, as well as the inlet and outlet pipes of the cylindrical cavity, are located in the bypass pipeline of the outlet pipeline below the shut-off valve 1 of the tabletop water purifier. Alternatively, the structure of the cylindrical pressure-reducing device 4 can be similar to that of a drip in an IV tubing.

[0117] In the solution of this invention, the control process of the pressure reducing device 4 includes: when the user operates the switch button of the countertop water purifier (such as the water outlet button on the touch screen of the countertop water purifier) ​​to dispense water, the control program of the countertop water purifier first determines the current state inside the pressure reducing device 4 based on the pressure sensor 5 inside the pressure reducing device 4, controls the control valve (such as the shut-off valve 1) of the water outlet pipeline of the countertop water purifier to open, and then controls the valves of the pressure reducing device 4 (i.e., the inlet throttling valve 2 at the front end of the bypass pressure reducing branch where the pressure reducing device 4 is located, and the outlet throttling valve 3 at the rear end of the bypass pressure reducing branch where the pressure reducing device 4 is located) to open, so that the water in the pressure reducing device 4 keeps circulating; when the user operates the switch button When turning off the water (such as the water outlet button on the touch screen of a countertop water purifier), the control program of the countertop water purifier first controls the valve of the pressure reducing device 4 (i.e., the inlet throttle valve at the front end of the bypass pressure reducing branch where the pressure reducing device 4 is located, and the outlet throttle valve 3 at the rear end of the bypass pressure reducing branch where the pressure reducing device 4 is located) to close, and then controls the control valve of the water outlet pipe of the countertop water purifier (such as the shut-off valve 1) to close, so that the air pressure in the pressure reducing device 4 is lower than the air pressure outside the countertop water purifier. At the same time, the pressure reducing device 4 is connected to the water outlet of the water outlet pipe of the countertop water purifier, thereby forming an adsorption force inside the water outlet pipe of the countertop water purifier, so that the water in the water outlet of the water outlet pipe of the countertop water purifier will not drip out.

[0118] like Figure 6 As shown, the water outlet control device of the countertop water purifier according to the present invention includes: an acquisition unit 102 and a control unit 104, wherein the acquisition unit 102 is a pressure sensor 5, and the control unit 104 is a controller of the countertop water purifier.

[0119] The control unit 104, when the countertop water purifier is powered on, executes a water dispensing command received from the user. Specifically, it first controls the switch module to turn on, allowing water to flow from the terminal water outlet pipe. The water dispensing command is a command to make the countertop water purifier dispense water, and may specifically be a button-activated water dispensing command. The specific functions and processing of the control unit 104 are described in step S110.

[0120] Acquisition unit 102 is used to acquire the actual pressure value inside the pressure reducing device 4; specifically, in Figure 7 In the example shown, the specific pressure value corresponding to the pressure range formed by the water and air inside the pressure reducing device 4 is detected by the pressure sensor 5 built into the pressure reducing device 4. The specific functions and processing of this acquisition unit 102 are described in step S120.

[0121] The control unit 104 is further configured to, when the switch module is turned on and water is flowing from the terminal outlet pipe, control the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, in stages according to the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. The specific functions and processing of the control unit 104 are further described in step S130. Specifically, the pressure reducing device 4 has a built-in pressure sensor 5, and the pressure value P0 detected when the shut-off valve 1 opens upon receiving the user's button water outlet command is taken as the initial value of the pressure value inside the pressure reducing device 4, and the target pressure value of the pressure value inside the pressure reducing device 4 is set to P. 目标 The target pressure value P 目标 The size of the pressure reducing device 4 can be determined based on its structure. It only needs to be able to generate negative pressure inside the pressure reducing device 4 when the user presses the button to turn off the water, so as to absorb the water droplets at the outlet of the water pipe of the tabletop water purifier.

[0122] In some embodiments, when the switch module is turned on and water is flowing from the terminal outlet pipe, the control unit 104, based on the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, performs phased control on the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, so that the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, including:

[0123] The control unit 104 is further configured to, when the switch module is turned on and water is flowing from the terminal outlet pipe, record the actual pressure value inside the pressure reducing device 4 obtained at the moment the switch module is turned on as the initial pressure value inside the pressure reducing device 4. The specific functions and processing of this control unit 104 are further described in step S210.

[0124] The control unit 104 is further configured to, when the switch module is turned on and water is flowing from the terminal outlet pipe, determine the current water and air storage mode inside the pressure reducing device 4 based on the initial pressure value and the target pressure value inside the pressure reducing device 4; the current water and air storage mode inside the pressure reducing device 4 refers to the current ratio of water to air inside the pressure reducing device 4. The specific functions and processing of this control unit 104 are further described in step S220.

[0125] The control unit 104 is further configured to perform a first-stage control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, based on the current water and air storage mode inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. The first-stage control is equivalent to the control of the throttle valve in stage A. The specific functions and processing of this control unit 104 are further described in step S230.

[0126] Specifically, Figure 8 This is a schematic flowchart illustrating an embodiment of a pressure reduction control method for the outlet pipe of a countertop water purifier according to the present invention. Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, comprising:

[0127] Step 1: With the countertop water purifier powered on, determine if the user's button-operated water dispensing command has been received. If yes, proceed to Step 2 to open the shut-off valve 1 and obtain the internal pressure value of the pressure reducing device 4; otherwise, continue waiting in Step 1. The countertop water purifier has a button, which can be a touch button. If the user clicks or touches this touch button when the countertop water purifier is not dispensing water, it is considered that the countertop water purifier has received the user's button-operated water dispensing command.

[0128] Step 2: If a user's button water dispensing command is received, the shut-off valve 1 is opened, and the detection value of the pressure sensor 5 is obtained to obtain the pressure value inside the pressure reducing device 4. Then, step 3 is executed to determine the current storage mode of water and air inside the pressure reducing device 4 based on the pressure value inside the pressure reducing device 4.

[0129] In some embodiments, the current water and air storage mode inside the pressure reducing device 4 includes any of the following states: a water shortage mode in which water is less than air in the current water and air ratio inside the pressure reducing device 4; a standard mode in which the water and air ratio inside the pressure reducing device 4 is balanced; and an overflow mode in which water is more than air in the current water and air ratio inside the pressure reducing device 4.

[0130] When the switch module is turned on and water is flowing from the terminal water outlet pipe, the control unit 104 determines the current water and air storage mode inside the pressure reducing device 4 based on the initial pressure value and the target pressure value inside the pressure reducing device 4, including any of the following determination scenarios:

[0131] The first determination scenario: The control unit 104 is further configured to determine the current storage mode of water and air inside the pressure reducing device 4 as the water shortage mode if the initial pressure value inside the pressure reducing device 4 is less than the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4.

[0132] The second determination scenario: The control unit 104 is further configured to determine the current storage mode of water and air inside the pressure reducing device 4 as the standard mode if the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4.

[0133] The third determination scenario: The control unit 104 is further configured to determine the current storage mode of water and air inside the pressure reducing device 4 as the overflow mode if the initial pressure value inside the pressure reducing device 4 is greater than or equal to the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4.

[0134] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0135] Step 3: Determine the current water and air storage mode inside the pressure reducing device 4 based on the internal pressure value. Then, execute Step 4 to control the water output stage of the countertop water purifier based on the current water and air storage mode inside the pressure reducing device 4. Step 3, determining the current water and air storage mode inside the pressure reducing device 4 based on the internal pressure value, specifically includes any one of steps 31, 32, and 33.

[0136] Step 31: When the detected initial pressure value P0 inside the pressure reducing device 4 is less than the set target pressure value P inside the pressure reducing device 4... 目标 - If a pressure value X is set, the current storage mode of water and air inside the pressure reducing device 4 is determined to be that the pressure reducing device 4 is in a water shortage mode.

[0137] Step 32: When the detected target pressure value P - set pressure value X ≤ detected initial pressure value P0 inside pressure reducing device 4 < set target pressure value P inside pressure reducing device 4 目标 + Set pressure value X, then determine the current storage mode of water and air inside pressure reducing device 4 as standard mode.

[0138] Step 33: When the detected initial pressure value P0 inside the pressure reducing device 4 is greater than or equal to the set target pressure value P inside the pressure reducing device 4. 目标 If a pressure value X is set, the current storage mode of water and air inside the pressure reducing device 4 is determined to be that the pressure reducing device 4 is in overflow mode. Here, the set pressure value X is the deviation threshold of the standard mode pressure value.

[0139] Step 4: Upon receiving a user's button command to dispense water from the countertop water purifier, the control program of the countertop water purifier enters the water dispensing stage. The control program first controls the shut-off valve 1 to open. With shut-off valve 1 open and water flowing from the countertop water purifier's outlet pipe, the water dispensing stage is controlled according to the current water and air storage mode inside the pressure reducing device 4. Specifically, the control of the inlet throttle valve 2 and the outlet throttle valve 3 is executed based on the current water and air storage mode inside the pressure reducing device 4. This specifically involves executing the throttle valve control stage A. Afterwards, Step 5 can be executed to control the water exchange stage.

[0140] In some embodiments, the control unit 104, based on the current water and air storage mode inside the pressure reducing device 4, performs a first-stage control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, including:

[0141] The control unit 104 is further configured to control the inlet flow rate regulation module to open, and to control the opening degree of the inlet flow rate regulation module to be the default initial opening degree of the inlet flow rate regulation module; simultaneously, it controls the outlet flow rate regulation module to open, and to control the opening degree of the outlet flow rate regulation module to be the default initial opening degree of the outlet flow rate regulation module. The specific functions and processing of this control unit 104 are further described in step S310.

[0142] The control unit 104 is further configured to, after a set maintenance time, perform closed-loop control on the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, as well as the opening degree after opening, based on the current water and air storage mode inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. The set maintenance time is, for example, time t0. The specific functions and processing of the control unit 104 are further described in step S320.

[0143] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes: in step 4, the process of executing the control of the throttle valve in stage A includes:

[0144] Step 41: Open the inlet throttle valve 2 to the opening degree P. 进 At the same time, open the outlet throttle valve 3 to the opening degree P. 出 Among them, the opening degree P 进 and opening degree P 出 The default initial opening is recommended to be half of the maximum opening of the corresponding valve. When the inlet throttle valve 2 and the outlet throttle valve 3 are both opened to their respective default initial openings and maintained for a time t0, step 42 is executed, that is, the closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 is entered. In other words, the closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 is performed according to the current storage mode of water and air inside the pressure reducing device 4.

[0145] Step 42: Perform closed-loop control on the inlet throttle valve 2 and the outlet throttle valve 3 according to the current storage mode of water and air inside the pressure reducing device 4. Specifically, this may include any one of steps 421, 422 and 423.

[0146] In some embodiments, the control unit 104 performs closed-loop control on the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, as well as the opening degree after opening, based on the current storage mode of water and air inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, including any of the following closed-loop control scenarios:

[0147] The first closed-loop control scenario: Specifically, the control unit 104 is further configured to, if the current storage mode of water and air inside the pressure reducing device 4 is the water shortage mode, control the opening of the inlet flow rate regulating module to increase at a first set rate, and control the outlet flow rate regulating module to close; then, record the actual pressure value inside the pressure reducing device 4 as the first current pressure value inside the pressure reducing device 4; after satisfying that the first current pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, control the opening of the inlet flow rate regulating module to maintain the current opening of the inlet flow rate regulating module, and control the outlet flow rate regulating module to open, and make the opening of the outlet flow rate regulating module the current opening of the inlet flow rate regulating module. Wherein, the first set rate is, for example, a rate mP / s. The first current pressure value is, for example, a current pressure value P1.

[0148] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 421, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current water and air storage mode inside the pressure reducing device 4, if the current water and air storage mode inside the pressure reducing device 4 is that the pressure reducing device 4 is in a water shortage mode, then: the control program of the countertop water purifier controls the opening of the inlet throttle valve 2 to increase at a rate of mP / s and controls the outlet throttle valve 3 to close. The rate mP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a value range of 10P / s to 60P / s is recommended. Furthermore, after adjusting the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the pressure sensor 5 detects that the current pressure value P1 inside the pressure reducing device 4 satisfies: P 目标 -X≤P1<P 目标 +X controls the inlet throttle valve 2 to maintain its current opening, and controls the outlet throttle valve 3 to quickly open to the same opening as the inlet throttle valve 2, so that the current pressure value P1 inside the pressure reducing device 4 is maintained at P. 目标 -X≤P1<P 目标 +X.

[0149] The second closed-loop control scenario: The control unit 104 is further configured to, if the current storage mode of water and air inside the pressure reducing device 4 is the standard mode, and the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then finely adjust and control the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening. Specifically, the actual pressure value inside the pressure reducing device 4 is recorded as the second current pressure value inside the pressure reducing device 4. Then, if the second current pressure value inside the pressure reducing device 4 is greater than... If the current pressure value inside the pressure reducing device 4 is equal to or less than the difference between the target pressure value and the set pressure deviation value, the opening of the inlet flow regulating module is increased at a second set rate, and the opening of the outlet flow regulating module is maintained at its current opening. If the current pressure value inside the pressure reducing device 4 is greater than or equal to the target pressure value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value, the opening of the inlet flow regulating module is decreased at a second set rate, and the opening of the outlet flow regulating module is maintained at its current opening. Wherein, the second set rate is, for example, a rate nP / s. The second current pressure value is, for example, a current pressure value P2.

[0150] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 422, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current storage mode of water and air inside the pressure reducing device 4, if the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in standard mode, and the initial pressure value P0 detected by the pressure sensor 5 inside the pressure reducing device 4 satisfies P... 目标 -X≤P0<P 目标 +X, then the control program of the tabletop water purifier will finely adjust the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3.

[0151] In the process of fine-tuning the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the detected current pressure value P2 inside the pressure reducing device 4 satisfies P... 目标 -X≤P2<P 目标 The control program of the tabletop water purifier controls the opening of the inlet throttle valve 2 to increase at a rate of nP / s, while the opening of the outlet throttle valve 3 remains at the current opening.

[0152] During the process of fine-tuning the opening of the inlet throttle valve 2 and the outlet throttle valve 3, when the detected current pressure value P2 inside the pressure reducing device 4 meets P 目标 ≤P2<P 目标 +X indicates that the control program of the countertop water purifier controls the opening of the inlet throttle valve 2 to decrease at a rate of nP / s, and controls the opening of the outlet throttle valve 3 to maintain the current opening. The rate nP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a value range of 1P / s to 5P / s is recommended.

[0153] The third closed-loop control scenario: Specifically, the control unit 104 is further configured to, if the current storage mode of water and air inside the pressure reducing device 4 is the overflow mode, control the opening of the outlet flow rate regulating module to increase at a first set rate, and control the inlet flow rate regulating module to close; then, record the actual pressure value inside the pressure reducing device 4 as the third current pressure value inside the pressure reducing device 4; after satisfying that the third current pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, control the opening of the outlet flow rate regulating module to maintain the current opening of the outlet flow rate regulating module, and control the inlet flow rate regulating module to open, and make the opening of the inlet flow rate regulating module the current opening of the outlet flow rate regulating module. Wherein, the first set rate is, for example, a rate mP / s. The third current pressure value is, for example, a current pressure value P3.

[0154] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: step 423, when performing closed-loop control of the inlet throttle valve 2 and the outlet throttle valve 3 according to the current water and air storage mode inside the pressure reducing device 4, if the current water and air storage mode inside the pressure reducing device 4 is that the pressure reducing device 4 is in overflow mode, then: the control program of the countertop water purifier controls the opening of the outlet throttle valve 3 to increase at a rate of mP / s, and controls the inlet throttle valve 2 to close. The rate mP / s can be selected according to the diameter of the bypass pressure reducing pipe, and a suggested range is 10P / s to 60P / s.

[0155] Furthermore, after adjusting the opening degrees of the inlet throttle valve 2 and the outlet throttle valve 3, when the pressure sensor 5 detects the current pressure value P3 inside the pressure reducing device 4, which satisfies P... 目标 -X≤P3<P 目标+X controls the outlet throttle valve 3 to maintain its current opening, and controls the inlet throttle valve 2 to quickly open to the same opening as the outlet throttle valve 3, so that the current pressure value P3 inside the pressure reducing device 4 is maintained at P. 目标 -X≤P3<P 目标 +X.

[0156] In some embodiments, the control unit 104, when the switch module is turned on and water is flowing from the terminal outlet pipe, performs staged control on the opening and closing of the inlet flow regulating module and the outlet flow regulating module, as well as the opening degree after opening, based on the actual pressure value inside the pressure reducing device 4 and the target pressure value inside the pressure reducing device 4, so as to maintain the actual pressure value inside the pressure reducing device 4 within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, and further includes:

[0157] The control unit 104 is further configured to, after performing a first-stage control on the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, based on the current water and air storage mode inside the pressure reducing device 4, or during the first-stage control of the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, ensure that the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4. That is, after ensuring that the actual pressure value inside the pressure reducing device 4 is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device 4, control the countertop water purifier to enter the water exchange stage, that is, control the countertop water purifier to execute the preset water exchange stage control logic, and time the time for the countertop water purifier to enter the water exchange stage. The specific functions and processing of this control unit 104 are also described in step S410.

[0158] The control unit 104 is further configured to control the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, as well as the opening degree after they are opened, after the time for the countertop water purifier to enter the water exchange stage meets the set water exchange time. Specifically, it first controls the inlet flow rate regulation module to close, sets a closing time, and then controls the outlet flow rate regulation module to close, thereby reducing the actual pressure value inside the pressure reducing device 4 in advance, so that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe. The water exchange time is set as time T0. The closing time is set as time T1. The specific functions and processing of this control unit 104 are also described in step S420.

[0159] Specifically, such as Figure 8As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0160] Step 5: Execute the water exchange phase control. Specifically, to ensure that the water stored inside the pressure reducing device 4 always flows out fresh water, the control program of the countertop water purifier must execute the water exchange phase control. In Step 5, when it is determined that the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in standard mode, the control program of the countertop water purifier enters the water exchange phase and starts timing. When the timing time meets time T0, step 6 is executed to execute the throttle valve control phase B.

[0161] Step 6: Control the inlet throttle valve 2 to close for time T1, then control the outlet throttle valve 3 to close. After that, execute step 7 to determine whether the user's button to turn off the water has been received.

[0162] In step 6, because there is still water flow at the outlet throttle valve 3 at the moment the inlet throttle valve 2 is closed, this will increase the air volume inside the pressure reducing device 4, thereby reducing the current pressure inside the pressure reducing device 4 so that the current pressure inside the pressure reducing device 4 is less than the external air pressure. Then the outlet throttle valve 3 is closed to keep the current pressure inside the pressure reducing device 4 less than the external air pressure.

[0163] The time T0 can be selected based on the storage space of the pressure reducing device 4, as well as the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3, with a recommended value range of 0 to 10 seconds. The time T1 can be selected based on the storage space of the pressure reducing device 4, as well as the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3, with a recommended value range of 0 to 3 seconds.

[0164] In some embodiments, the control unit 104 is further configured to, in the first stage of controlling the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, according to the current storage mode of water and air inside the pressure reducing device 4, if the current storage mode of water and air inside the pressure reducing device 4 is the standard mode, and the initial pressure value inside the pressure reducing device 4 is greater than or equal to the difference between the target pressure value and the set pressure deviation value inside the pressure reducing device 4, and less than the sum of the target pressure value and the set pressure deviation value inside the pressure reducing device 4, then the first process of finely adjusting and controlling the opening and closing of the inlet flow rate regulation module and the outlet flow rate regulation module, and the opening degree after opening, can be executed in parallel with the second process of controlling the countertop water purifier to enter the water exchange stage.

[0165] The control unit 104 is further configured to prioritize the execution of the second process when the set water exchange time is reached during the parallel execution of the first process and the second process.

[0166] Specifically, such as Figure 8 As shown, the present invention proposes a pressure reduction control method for the outlet pipe of a countertop water purifier, which further includes: during actual control, when the current storage mode of water and air inside the pressure reducing device 4 is that the pressure reducing device 4 is in the standard mode, the opening degree of the inlet throttle valve 2 and the opening degree of the outlet throttle valve 3 are controlled to enter a fine adjustment control process. This process can be parallel to the control of the throttle valve control stage B during the water replacement stage. However, if the timing time at the start of the water replacement stage meets time T0, the control of the throttle valve control stage B during the water replacement stage is executed first.

[0167] The control unit 104 is further configured to, when the switch module is turned on and water is flowing from the terminal outlet pipe, after performing phased control on and off of the inlet flow regulating module and the outlet flow regulating module, and their opening degree after opening, based on the actual pressure value inside the pressure reducing device 4, or during the phased control of the inlet flow regulating module and the outlet flow regulating module, and their opening degree after opening, if a water shut-off command is received from the user, execute the water shut-off command. Specifically, it first controls the switch module to turn off to prevent water from flowing from the terminal outlet pipe. The specific functions and processing of this control unit 104 are further described in step S140.

[0168] The control unit 104 is also used to delay the opening and closing of the water flow regulation module after the control switch module is turned off, to ensure that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe, so that no water drips from the outlet of the terminal water outlet pipe after the switch module is turned off. The water shut-off command is a command to stop the water from flowing out of the countertop water purifier, specifically a button water shut-off command. For the specific functions and processing of the control unit 104, please refer to step S150.

[0169] The present invention proposes a pressure-reducing control device for the outlet pipe of a countertop water purifier. This device adds a pressure-reducing device 4 to the outlet pipe of the countertop water purifier. A pressure sensor 5 installed inside the pressure-reducing device 4 detects the internal pressure, determines the presence and quantity of water within the device, and establishes the current water and air storage mode. The countertop water purifier's control program then controls the opening and closing sequence of the valves (i.e., the shut-off valve 1, the inlet throttle valve at the front end of the bypass pressure-reducing branch containing the pressure-reducing device 4, and the outlet throttle valve 3 at the rear end of the bypass pressure-reducing branch containing the pressure-reducing device 4), thereby creating a pressure difference between the inside of the pressure-reducing device 4 (i.e., the pipe containing the pressure-reducing device 4) and the outside environment (i.e., the area outside the pipe containing the pressure-reducing device 4). Furthermore, when the user turns off the water by pressing the water-off button after filling the tubing, the control program of the countertop water purifier activates the pressure reducing device 4, which in turn opens the outlet throttle valve 3. This connects the tubing containing the pressure reducing device 4 to the outside of the tubing, creating a negative pressure inside the outlet tubing. This negative pressure traps water droplets inside the tubing, preventing them from dripping out. The pressure difference created by this negative pressure prevents water from continuing to drip after the user has finished filling the tubing and turned off the water, thus improving the user experience.

[0170] In some embodiments, after controlling the switch module to turn off, the control unit 104 delays the opening and closing of the water flow regulating module to ensure that the actual pressure value inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water pipe, including:

[0171] The control unit 104 is further configured to, after controlling the switch module to turn off, delay for a set time before controlling the water flow regulation module to turn on; the set delay time is, for example, time T2. The specific functions and processing of the control unit 104 are further described in step S510.

[0172] The control unit 104 is further configured to control the water flow regulation module to close after the water flow regulation module has been turned on for a set time, so as to ensure that the actual pressure inside the pressure reducing device 4 is less than the air pressure outside the outlet of the terminal water outlet pipe; the set time is, for example, time T3. The specific functions and processing of the control unit 104 are further described in step S520.

[0173] Specifically, such as Figure 8 As shown, the present invention proposes a method for pressure reduction control of the outlet pipe of a countertop water purifier, which further includes:

[0174] Step 7: Determine if the user's button-to-turn-off command has been received: If yes, proceed to Step 8 to execute the pressure reduction control phase; otherwise, continue waiting in Step 7. The countertop water purifier has a button, which can be a touch button. When the countertop water purifier is dispensing water, if the user clicks or touches this touch button, it is considered that the countertop water purifier has received the user's button-to-turn-off command.

[0175] In step 8, when the user presses the button to turn off the water after filling the container, the countertop water purifier's control program enters the pressure reduction control phase: Upon receiving a water-off command (such as a button-to-turn-off instruction), the countertop water purifier's control program immediately closes the shut-off valve 1, and then, after a delay of T2, quickly opens the outlet throttling valve 3. Because some water still flows out of the outlet pipe behind the shut-off valve 1 at the moment of closing, creating a certain vacuum zone, opening the outlet throttling valve 3, where the current pressure inside the pressure reducing device 4 is lower than the external air pressure, will draw some water from the outlet pipe behind the shut-off valve 1 into the pressure reducing device 4, thus achieving pressure balance within and outside the pressure reducing device 4. The outlet throttling valve 3 is opened for T3 seconds before closing, allowing the pressure in the outlet pipe behind the shut-off valve 1 to reach equilibrium with the external pressure, ensuring that no water drips out after the button is pressed to turn off the water. The time T2 can be selected based on the storage space of the pressure reducing device 4, as well as the opening degrees of the inlet throttling valve 2 and the outlet throttling valve 3; a range of 0 to 3 seconds is recommended. The time T3 can also be selected based on the storage space of the pressure reducing device 4, as well as the opening degree of the inlet throttle valve 2 and the outlet throttle valve 3. It is recommended to take a value range of 0 to 3 seconds.

[0176] The control unit 104 is further configured to, during the process of controlling the opening and closing of the inlet flow rate regulating module and the outlet flow rate regulating module, and the degree of opening after opening, in stages according to the actual pressure value and the target pressure value inside the pressure reducing device 4, prioritize executing the water shut-off command if it receives the command. The control unit 104 is also configured to, after controlling the switch module to shut off, delay the opening and closing of the outlet flow rate regulating module, and prioritize executing the outlet flow command if it receives the command.

[0177] It should be noted that in the control of each stage in steps 1 to 8 above, the button to dispense water and the button to turn off water have the highest priority. For example, after the button dispenses water, the water exchange control is executed. If the button to turn off water is pressed at this time, the button to turn off water should be executed immediately. When the button is pressed to dispense water again, the control program of the countertop water purifier will re-execute the pressure detection stage, the water exchange stage, and other subsequent logic.

[0178] The solution of this invention, through the pressure reducing device 4 and its control method installed in the water outlet pipe of the countertop water purifier, can achieve precise control of the water droplets at the outlet of the countertop water purifier. This allows the water droplets at the outlet to be quickly locked after the water is turned off by pressing the button, preventing them from dripping out and forming large water stains. Thus, it avoids water droplets falling from the outlet of the countertop water purifier and forming water stains when the user presses the switch button (such as the water outlet button on the touch screen of the countertop water purifier) ​​to turn off the water, ensuring that the countertop water purifier is dry and clean, reducing the user's frequent wiping work, and making it more convenient, faster, cleaner, more hygienic, and safer for the user.

[0179] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0180] By adopting the technical solution of this invention, a bypass pressure-reducing branch is set at the outlet pipe of the countertop water purifier after the shut-off valve 1. In the bypass pressure-reducing branch, from the inlet to the outlet, an inlet throttling valve 2, a pressure-reducing device 4, and an outlet throttling valve 3 are sequentially arranged. When the countertop water purifier is powered on and the user presses the button to dispense water, after the shut-off valve 1 opens, the opening and closing of the inlet throttling valve 2 and the outlet throttling valve 3, as well as their opening degree, are controlled in stages according to the current pressure inside the pressure-reducing device 4. This ensures that the current water and air storage mode inside the pressure-reducing device 4 is maintained in the standard mode. That is, the current pressure inside the pressure reducing device 4 is maintained within the set pressure difference range of the target pressure value inside the pressure reducing device 4; then, when the user presses the button to turn off the water, after the control shut-off valve 1 is closed, the outlet throttle valve 3 is opened after a delay to allow some of the water adsorbed at the outlet pipe at the rear end of the shut-off valve 1 to enter the pressure reducing device 4 to form an internal and external pressure balance of the pressure reducing device 4. The outlet throttle valve 3 is closed after being opened for a certain period of time, so that the pressure value in the outlet pipe at the rear end of the shut-off valve 1 is balanced with the outside, so that no water drips out after the button is pressed to turn off the water, making it more convenient, faster, cleaner, more hygienic, and safer for the user.

[0181] According to an embodiment of the present invention, a countertop water purifier corresponding to a water outlet control device for a countertop water purifier is also provided. This countertop water purifier may include the water outlet control device described above for a countertop water purifier.

[0182] Since the processing and functions implemented by the countertop water purifier in this embodiment are basically the same as those of the aforementioned device embodiments, principles and examples, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0183] By adopting the technical solution of this invention, a bypass pressure-reducing branch is set at the rear end of the outlet pipe of the countertop water purifier. In this bypass pressure-reducing branch, from the inlet to the outlet, an inlet throttling valve 2, a pressure-reducing device 4, and an outlet throttling valve 3 are sequentially arranged. When the countertop water purifier is powered on and the user presses the button to dispense water, after the control shut-off valve 1 opens, the opening and closing of the control inlet throttling valve 2 and the outlet throttling valve 3, as well as their opening degree, are controlled in stages according to the current pressure inside the pressure-reducing device 4. This ensures that the current water and air storage mode inside the pressure-reducing device 4 is maintained in the standard mode, i.e., The pressure inside the pressure reducing device 4 is maintained within the set pressure difference range of the target pressure value inside the pressure reducing device 4. Furthermore, when the user presses the button to turn off the water, after the control shut-off valve 1 closes, the outlet throttle valve 3 is opened after a delay to allow some of the water adsorbed at the outlet pipe at the rear end of the shut-off valve 1 to enter the pressure reducing device 4, thereby forming an internal and external pressure balance in the pressure reducing device 4. The outlet throttle valve 3 is opened for a certain period of time and then closed, so that the pressure value in the outlet pipe at the rear end of the shut-off valve 1 reaches a balance with the outside, so that no water drips out after the button is pressed to turn off the water, ensuring that the countertop water purifier is dry and clean, and also reducing the user's frequent wiping work.

[0184] According to an embodiment of the present invention, a storage medium corresponding to a water outlet control method for a countertop water purifier is also provided. The storage medium includes a stored program, wherein, when the program is executed, the device where the storage medium is located controls the execution of the water outlet control method for the countertop water purifier described above.

[0185] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0186] By adopting the technical solution of this invention, a bypass pressure-reducing branch is set at the rear end of the outlet pipe of the countertop water purifier. In the bypass pressure-reducing branch, from the inlet to the outlet, an inlet throttling valve 2, a pressure-reducing device 4, and an outlet throttling valve 3 are sequentially arranged. When the countertop water purifier is powered on and the user presses the button to dispense water, after the control shut-off valve 1 opens, the opening and closing of the control inlet throttling valve 2 and the outlet throttling valve 3, as well as their opening degree, are controlled in stages according to the current pressure inside the pressure-reducing device 4. This maintains the current water and air storage mode inside the pressure-reducing device 4. In standard mode, the current pressure inside the pressure reducing device 4 is maintained within the set pressure difference range of the target pressure value inside the pressure reducing device 4. Then, when the user presses the button to turn off the water, after the control shut-off valve 1 is closed, the outlet throttle valve 3 is opened after a delay to allow some of the water adsorbed at the outlet pipe at the rear end of the shut-off valve 1 to enter the pressure reducing device 4 to form an internal and external pressure balance in the pressure reducing device 4. The outlet throttle valve 3 is closed after being open for a certain period of time, so that the pressure value in the outlet pipe at the rear end of the shut-off valve 1 is balanced with the outside, so that no water drips out after the button is pressed to turn off the water, thus improving the user experience.

[0187] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0188] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A water outlet control method of a table water purifier, characterized by, The table type water purifier has a water outlet pipeline, and a switch module is arranged in the water outlet pipeline; the switch module is used for controlling opening or closing of the water outlet pipeline; a part of the water outlet pipeline located at a rear end of the switch module is recorded as a terminal water outlet pipeline; a bypass pipeline, recorded as a bypass pressure reduction branch, is arranged at the terminal water outlet pipeline; the bypass pressure reduction branch is bypassed and arranged between a pipeline where a water inlet of the terminal water outlet pipeline is located and a pipeline where a water outlet is located; an inlet flow rate adjusting module, a pressure reduction device (4) and an outlet flow rate adjusting module are sequentially arranged on the bypass pressure reduction branch in a direction from the switch module to the water outlet of the terminal water outlet pipeline; The pressure reduction device (4) has a containing cavity, and water and / or air are contained in the containing cavity; The water outlet control method of the table type water purifier comprises the following steps: In a case where the table type water purifier is powered on, if a water outlet instruction issued by a user is received, the switch module is controlled to be opened; An actual pressure value inside the pressure reduction device (4) is acquired; In a case where the switch module is opened and the terminal water outlet pipeline is used for water outlet, the opening and closing of the inlet flow rate adjusting module and the outlet flow rate adjusting module and the opening degree after being opened are controlled in stages according to the actual pressure value inside the pressure reduction device (4) and a target pressure value inside the pressure reduction device (4), so that the actual pressure value inside the pressure reduction device (4) is maintained within a set pressure deviation range of the target pressure value inside the pressure reduction device (4); If a water closing instruction issued by the user is received, the switch module is controlled to be closed; After the switch module is controlled to be closed, the opening and closing of the outlet flow rate adjusting module is controlled in a time-delay manner, so as to ensure that the actual pressure value inside the pressure reduction device (4) is smaller than an air pressure outside the water outlet of the terminal water outlet pipeline.

2. The water outlet control method of the table-type water purifier according to claim 1, characterized in that, In a case where the switch module is opened and the terminal water outlet pipeline is used for water outlet, the opening and closing of the inlet flow rate adjusting module and the outlet flow rate adjusting module and the opening degree after being opened are controlled in stages according to the actual pressure value inside the pressure reduction device (4) and a target pressure value inside the pressure reduction device (4), so that the actual pressure value inside the pressure reduction device (4) is maintained within a set pressure deviation range of the target pressure value inside the pressure reduction device (4), comprising: In a case where the switch module is opened and the terminal water outlet pipeline is used for water outlet, an actual pressure value inside the pressure reduction device (4) acquired at a time when the switch module is opened is recorded as an initial pressure value inside the pressure reduction device (4); According to the initial pressure value inside the pressure reduction device (4) and the target pressure value inside the pressure reduction device (4), a current storage mode of water and air inside the pressure reduction device (4) is determined; the current storage mode of water and air inside the pressure reduction device (4) refers to a current proportion condition of water and air inside the pressure reduction device (4). According to the current storage mode of water and air inside the pressure reducing device (4), the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening are controlled in the first stage to maintain the actual pressure value inside the pressure reducing device (4) within the set pressure deviation range of the target pressure value inside the pressure reducing device (4).

3. The water outlet control method of the table-type water purifier according to claim 2, characterized in that, The current storage mode of water and air inside the pressure reducing device (4) includes any of the following states: a water shortage mode in which water is less than air in the current proportion of water and air inside the pressure reducing device (4); a standard mode in which the proportion of water and air is balanced in the current proportion of water and air inside the pressure reducing device (4); and a water overflow mode in which water is more than air in the current proportion of water and air inside the pressure reducing device (4). According to the initial pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), the current storage mode of water and air inside the pressure reducing device (4) is determined, including: If the initial pressure value inside the pressure reducing device (4) is less than the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air inside the pressure reducing device (4) is the water shortage mode; If the initial pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value and less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air inside the pressure reducing device (4) is the standard mode; If the initial pressure value inside the pressure reducing device (4) is greater than or equal to the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air inside the pressure reducing device (4) is the water overflow mode.

4. The water outlet control method of the table-type water purifier according to claim 3, characterized in that, According to the current storage mode of water and air inside the pressure reducing device (4), the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening are controlled in the first stage to maintain the actual pressure value inside the pressure reducing device (4) within the set pressure deviation range of the target pressure value inside the pressure reducing device (4), including: The water inlet flow adjusting module is controlled to be opened, and the opening degree of the water inlet flow adjusting module is controlled to be the default initial opening degree of the water inlet flow adjusting module; at the same time, the water outlet flow adjusting module is controlled to be opened, and the opening degree of the water outlet flow adjusting module is controlled to be the default initial opening degree of the water outlet flow adjusting module; After the opening degree of the water inlet flow adjusting module is the default initial opening degree of the water inlet flow adjusting module, the opening degree of the water outlet flow adjusting module is the default initial opening degree of the water outlet flow adjusting module, and a set maintaining time is maintained, the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening are closed-loop controlled according to the current storage mode of water and air inside the pressure reducing device (4) so as to maintain the actual pressure value inside the pressure reducing device (4) within a set pressure deviation range of the target pressure value inside the pressure reducing device (4).

5. The water outlet control method of the table-type water purifier according to claim 4, wherein The closed-loop control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening according to the current storage mode of water and air inside the pressure reducing device (4) so as to maintain the actual pressure value inside the pressure reducing device (4) within a set pressure deviation range of the target pressure value inside the pressure reducing device (4) includes: If the current storage mode of water and air inside the pressure reducing device (4) is the water shortage mode, the opening degree of the water inlet flow adjusting module is controlled to be opened at a first set rate, and the water outlet flow adjusting module is controlled to be closed; then, the actual pressure value inside the pressure reducing device (4) is recorded as a first current pressure value inside the pressure reducing device (4), and after the first current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and a set pressure deviation value and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water inlet flow adjusting module is controlled to maintain the current opening degree of the water inlet flow adjusting module, and the water outlet flow adjusting module is controlled to be opened and the opening degree of the water outlet flow adjusting module is the current opening degree of the water inlet flow adjusting module; If the current storage mode of water and air inside the pressure reducing device (4) is the standard mode, and the initial pressure value inside the pressure reducing device (4) still satisfies the condition that it is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, then the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module, and the opening degree after opening are finely adjusted and controlled. Specifically, the actual pressure value inside the pressure reducing device (4) is recorded as the second current pressure value inside the pressure reducing device (4). Then, if the second current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the target pressure value inside the pressure reducing device (4), the opening degree of the water inlet flow adjusting module is controlled to open at a second set rate, and the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module. If the second current pressure value inside the pressure reducing device (4) is greater than or equal to the target pressure value inside the pressure reducing device (4), and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water inlet flow adjusting module is controlled to close at a second set rate, and the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module. If the current storage mode of water and air inside the pressure reducing device (4) is the overflow mode, the opening degree of the water outlet flow adjusting module is controlled to open at a first set rate, and the water inlet flow adjusting module is controlled to close. Then, the actual pressure value inside the pressure reducing device (4) is recorded as the third current pressure value inside the pressure reducing device (4). After the third current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module, and the water inlet flow adjusting module is opened with the opening degree being the current opening degree of the water outlet flow adjusting module.

6. The water outlet control method of the table-type water purifier according to claim 5, wherein In the case that the switch module is open and the end water outlet pipeline is discharging water, according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module, and the opening degree after opening are controlled in stages to maintain the actual pressure value inside the pressure reducing device (4) within the set pressure deviation range of the target pressure value inside the pressure reducing device (4). After maintaining the actual pressure value inside the pressure reducing device (4) within the set pressure deviation range of the target pressure value inside the pressure reducing device (4), the table water purifier is controlled to enter a water changing stage; After the time when the table water purifier enters the water changing stage meets the set water changing time, the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened are controlled in the water changing stage, specifically: the water inlet flow adjusting module is first controlled to be closed, and then the water outlet flow adjusting module is controlled to be closed after the set closing time, so as to reduce the actual pressure value inside the pressure reducing device (4) in advance, and make the actual pressure value inside the pressure reducing device (4) less than the air pressure outside the water outlet of the terminal water outlet pipe.

7. The water outlet control method of the table-type water purifier according to claim 6, characterized in that, Wherein, In the first stage control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened according to the current storage mode of water and air inside the pressure reducing device (4), if the current storage mode of water and air inside the pressure reducing device (4) is the standard mode, and still meets the condition that the initial pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, a first process of fine adjustment control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened is performed; Wherein, in the process of parallel execution of the first process and the second process, if the time when the table water purifier enters the water changing stage meets the set water changing time, the second process is preferentially executed.

8. The water outlet control method of a table-type water purifier according to any one of claims 1 to 7, characterized in that, After the switch module is controlled to be turned off, the opening and closing of the water outlet flow adjusting module is controlled with time delay, so as to ensure that the actual pressure value inside the pressure reducing device (4) is less than the air pressure outside the water outlet of the terminal water outlet pipe, including: After the switch module is controlled to be turned off, the water outlet flow adjusting module is controlled to be opened after a time delay of a set time delay time; After the water outlet flow adjusting module is opened for a set opening time, the water outlet flow adjusting module is controlled to be closed, so as to ensure that the actual pressure value inside the pressure reducing device (4) is less than the air pressure outside the water outlet of the terminal water outlet pipe; Wherein, in the process of stage control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), if the water closing instruction is received, the water closing instruction is preferentially executed; In the process of time delay control of the opening and closing of the water outlet flow adjusting module after the switch module is controlled to be turned off, if the water outlet instruction is received, the water outlet instruction is preferentially executed.

9. The water outlet control method of a table-type water purifier according to any one of claims 1 to 7, characterized in that, Wherein, In the case that the water outlet pipeline is vertically arranged, the pressure reducing device (4) is located below the switch module within a certain distance range in the vertical direction; The top end of the accommodating cavity is connected to the pipeline where the water inlet flow regulating module is located; and the bottom end of the accommodating cavity is connected to the pipeline where the water outlet flow regulating module is located.

10. A water outlet control device for a table water purifier, characterized by comprising: The table water purifier has a water outlet pipeline, and a switch module is arranged in the water outlet pipeline; the switch module is used for controlling opening or closing of the water outlet pipeline; a part of the water outlet pipeline located at the rear end of the switch module in the water outlet pipeline is recorded as a terminal water outlet pipeline; a bypass pipeline, recorded as a bypass pressure reducing branch, is arranged at the terminal water outlet pipeline; the bypass pressure reducing branch is bypassed and arranged between the pipeline where the water inlet of the terminal water outlet pipeline is located and the pipeline where the water outlet is located; an water inlet flow regulating module, a pressure reducing device (4) and a water outlet flow regulating module are sequentially arranged on the bypass pressure reducing branch in the direction from the switch module to the water outlet of the terminal water outlet pipeline; The pressure reducing device (4) has an accommodating cavity, and water and / or air are accommodated in the accommodating cavity; The water outlet control device of the table water purifier comprises: A control unit is used for, in the case that the table water purifier is powered on, controlling the switch module to be opened if a water outlet instruction issued by a user is received; An acquisition unit is used for acquiring an actual pressure value inside the pressure reducing device (4); The control unit is further used for, in the case that the switch module is opened and the terminal water outlet pipeline is used for water outlet, controlling the opening and closing of the water inlet flow regulating module and the water outlet flow regulating module and the opening degree after being opened in stages according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), so that the actual pressure value inside the pressure reducing device (4) is maintained within a set pressure deviation range of the target pressure value inside the pressure reducing device (4). The control unit is further used for, if a water closing instruction issued by a user is received, controlling the switch module to be closed; The control unit is further used for, after controlling the switch module to be closed, controlling the opening and closing of the water outlet flow regulating module in a time-delay manner, so as to ensure that the actual pressure value inside the pressure reducing device (4) is smaller than the air pressure outside the water outlet of the terminal water outlet pipeline.

11. The water outlet control device of a table type water purifier according to claim 10, wherein The control unit, in the case that the switch module is opened and the terminal water outlet pipeline is used for water outlet, controls the opening and closing of the water inlet flow regulating module and the water outlet flow regulating module and the opening degree after being opened in stages according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), so that the actual pressure value inside the pressure reducing device (4) is maintained within a set pressure deviation range of the target pressure value inside the pressure reducing device (4), which comprises: In the case that the switch module is opened and the terminal water outlet pipeline is used for water outlet, the actual pressure value inside the pressure reducing device (4) acquired at the moment when the switch module is opened is recorded as an initial pressure value inside the pressure reducing device (4). Determine the current storage mode of water and air in the pressure reducing device (4) according to the initial pressure value in the pressure reducing device (4) and the target pressure value in the pressure reducing device (4); the current storage mode of water and air in the pressure reducing device (4) refers to the current proportion of water and air in the pressure reducing device (4); According to the current storage mode of water and air in the pressure reducing device (4), the control unit controls the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening in the first stage, so that the actual pressure value in the pressure reducing device (4) is maintained within the set pressure deviation range of the target pressure value in the pressure reducing device (4).

12. The water outlet control device of the table type water purifier according to claim 11, wherein, The current storage mode of water and air in the pressure reducing device (4) includes any one of the following states: the water shortage mode in which water is less than air in the current proportion of water and air in the pressure reducing device (4), the standard mode in which the proportion of water and air is balanced in the current proportion of water and air in the pressure reducing device (4), and the overflow mode in which water is more than air in the current proportion of water and air in the pressure reducing device (4); The control unit determines the current storage mode of water and air in the pressure reducing device (4) according to the initial pressure value in the pressure reducing device (4) and the target pressure value in the pressure reducing device (4), which includes: If the initial pressure value in the pressure reducing device (4) is less than the difference between the target pressure value in the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air in the pressure reducing device (4) is the water shortage mode; If the initial pressure value in the pressure reducing device (4) is greater than or equal to the difference between the target pressure value in the pressure reducing device (4) and the set pressure deviation value and less than the sum of the target pressure value in the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air in the pressure reducing device (4) is the standard mode; If the initial pressure value in the pressure reducing device (4) is greater than or equal to the sum of the target pressure value in the pressure reducing device (4) and the set pressure deviation value, it is determined that the current storage mode of water and air in the pressure reducing device (4) is the overflow mode.

13. The water outlet control device of a table type water purifier according to claim 12, wherein, The control unit controls the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening in the first stage according to the current storage mode of water and air in the pressure reducing device (4), so that the actual pressure value in the pressure reducing device (4) is maintained within the set pressure deviation range of the target pressure value in the pressure reducing device (4), which includes: Control the water inlet flow adjusting module to open, and control the opening degree of the water inlet flow adjusting module to be the default initial opening degree of the water inlet flow adjusting module; at the same time, control the water outlet flow adjusting module to open, and control the opening degree of the water outlet flow adjusting module to be the default initial opening degree of the water outlet flow adjusting module; After the opening degree of the water inlet flow adjusting module is the default initial opening degree of the water inlet flow adjusting module, the opening degree of the water outlet flow adjusting module is the default initial opening degree of the water outlet flow adjusting module, and a set maintaining time is maintained, the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening are closed-loop controlled according to the current storage mode of water and air inside the pressure reducing device (4) so as to maintain the actual pressure value inside the pressure reducing device (4) within a set pressure deviation range of the target pressure value inside the pressure reducing device (4).

14. The water outlet control device of the table type water purifier according to claim 13, wherein, The control unit, according to the current storage mode of water and air inside the pressure reducing device (4), controls the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after opening so as to maintain the actual pressure value inside the pressure reducing device (4) within a set pressure deviation range of the target pressure value inside the pressure reducing device (4), comprising: If the current storage mode of water and air inside the pressure reducing device (4) is the water shortage mode, the opening degree of the water inlet flow adjusting module is controlled to be opened at a first set rate, and the water outlet flow adjusting module is controlled to be closed; then, the actual pressure value inside the pressure reducing device (4) is recorded as a first current pressure value inside the pressure reducing device (4), and after the first current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and a set pressure deviation value and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water inlet flow adjusting module is controlled to maintain the current opening degree of the water inlet flow adjusting module, and the water outlet flow adjusting module is controlled to be opened and the opening degree of the water outlet flow adjusting module is the current opening degree of the water inlet flow adjusting module; If the current storage mode of water and air inside the pressure reducing device (4) is the standard mode, and the initial pressure value inside the pressure reducing device (4) still satisfies the condition that it is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, then the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module, and the opening degree after opening are finely adjusted and controlled. Specifically, the actual pressure value inside the pressure reducing device (4) is recorded as the second current pressure value inside the pressure reducing device (4). Then, if the second current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the target pressure value inside the pressure reducing device (4), the opening degree of the water inlet flow adjusting module is controlled to open at a second set rate, and the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module. If the second current pressure value inside the pressure reducing device (4) is greater than or equal to the target pressure value inside the pressure reducing device (4), and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water inlet flow adjusting module is controlled to close at a second set rate, and the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module. If the current storage mode of water and air inside the pressure reducing device (4) is the overflow mode, the opening degree of the water outlet flow adjusting module is controlled to open at a first set rate, and the water inlet flow adjusting module is controlled to close. Then, the actual pressure value inside the pressure reducing device (4) is recorded as the third current pressure value inside the pressure reducing device (4). After the third current pressure value inside the pressure reducing device (4) is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and is less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the opening degree of the water outlet flow adjusting module is maintained at the current opening degree of the water outlet flow adjusting module, and the water inlet flow adjusting module is opened with the opening degree of the water inlet flow adjusting module being the current opening degree of the water outlet flow adjusting module.

15. The water outlet control device of the table type water purifier according to claim 14, wherein, The control unit controls the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module, and the opening degree after opening in stages, so that the actual pressure value inside the pressure reducing device (4) is maintained within the set pressure deviation range of the target pressure value inside the pressure reducing device (4), according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4) when the switch module is open and the end water outlet pipeline is discharging water. After maintaining the actual pressure value inside the pressure reducing device (4) within the set pressure deviation range of the target pressure value inside the pressure reducing device (4), the table water purifier is controlled to enter a water changing stage; After the time when the table water purifier enters the water changing stage meets the set water changing time, the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened are controlled in the water changing stage, specifically: the water inlet flow adjusting module is first controlled to be closed, and then the water outlet flow adjusting module is controlled to be closed after the set closing time, so as to reduce the actual pressure value inside the pressure reducing device (4) in advance, and make the actual pressure value inside the pressure reducing device (4) less than the air pressure outside the water outlet of the terminal water outlet pipe.

16. The water outlet control device of the table type water purifier according to claim 15, wherein Wherein, In the first stage control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened according to the current storage mode of water and air inside the pressure reducing device (4), if the current storage mode of water and air inside the pressure reducing device (4) is the standard mode, and the initial pressure value inside the pressure reducing device (4) still meets the condition that it is greater than or equal to the difference between the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, and less than the sum of the target pressure value inside the pressure reducing device (4) and the set pressure deviation value, the first process of fine adjustment control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened is performed, and the first process and the second process of water changing stage control of the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened can be executed in parallel; In the process of executing the first process and the second process in parallel, if the time when the table water purifier enters the water changing stage meets the set water changing time, the second process is preferentially executed.

17. The water outlet control device of a table type water purifier according to any one of claims 10 to 16, wherein After the control unit controls the switch module to be off, the opening and closing of the water outlet flow adjusting module is controlled with a time delay, so as to ensure that the actual pressure value inside the pressure reducing device (4) is less than the air pressure outside the water outlet of the terminal water outlet pipe, including: After the control unit controls the switch module to be off, the water outlet flow adjusting module is controlled to be opened after a delay time is set; After the water outlet flow adjusting module is opened for a set opening time, the water outlet flow adjusting module is controlled to be closed, so as to ensure that the actual pressure value inside the pressure reducing device (4) is less than the air pressure outside the water outlet of the terminal water outlet pipe; In the process of controlling the opening and closing of the water inlet flow adjusting module and the water outlet flow adjusting module and the opening degree after being opened in stages according to the actual pressure value inside the pressure reducing device (4) and the target pressure value inside the pressure reducing device (4), if the water closing instruction is received, the water closing instruction is preferentially executed. The control unit is further configured to, after controlling the switch module to be turned off, if the water outlet instruction is received during the process of controlling the water outlet flow adjusting module to be turned on and off, preferentially execute the water outlet instruction.

18. The water outlet control device of a table type water purifier according to any one of claims 10 to 16, wherein In the case that the water outlet pipeline is vertically arranged, the pressure reducing device (4) is located within a distance range below the switch module in the vertical direction. The top end of the accommodating cavity is connected to a pipeline in which the water inlet flow adjusting module is arranged, and the bottom end of the accommodating cavity is connected to a pipeline in which the water outlet flow adjusting module is arranged.

19. A bench top water purifier characterized by, The water outlet control device of the table type water purifier according to any one of claims 10 to 18. The storage medium comprises a stored program, wherein the program controls a device in which the storage medium is located to execute the water outlet control method of the table type water purifier according to any one of claims 1 to 8 when the program is executed.

20. A storage medium, characterized by The storage medium comprises a stored program, wherein the program controls a device in which the storage medium is located to execute the water outlet control method of the table type water purifier according to any one of claims 1 to 8 when the program is executed.

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