Waterway system

Abstract

The utility model provides a waterway system. The waterway system comprises a raw water inlet, a water purification unit, a refrigeration unit, a purified water outlet and a control module, a water pressure detection switch electrically connected with the control module is arranged between the water purification unit and the refrigeration unit, the water pressure detection switch is used for detecting a water pressure signal of the water inlet end of the refrigeration unit, the refrigeration unit is externally connected with a pressure relief waterway, and the control module controls opening and closing of the pressure relief waterway and the raw water inlet based on the water pressure signal. In the application, the water pressure detection switch is arranged in the waterway system of the water purification equipment, the water pressure signal of the water inlet end of the refrigeration unit is detected through the water pressure detection switch, and the control module controls the opening and closing of the pressure relief waterway and the raw water inlet based on the water pressure signal, so that the purpose of releasing water pressure in the waterway system is achieved; and the phenomenon of pipeline expansion or water leakage caused by overlarge water pressure can be prevented.

Description

Technical Field

[0001] The present application relates to the technical field of water purifiers, and in particular to a waterway system. Background Art

[0002] In order to obtain cleaner drinking water, more and more families choose to use water purification equipment, such as water purifiers. Existing water purifiers are generally directly connected to a water supply system with water supply pressure. When users take water, if the water outlet is blocked or the pipeline is blocked, the water pressure in the waterway will be too high, and there is a risk of pipeline expansion or leakage.

[0003] Currently, water purifiers with pressure detection on the market are generally equipped with a hard protection switch. When the water pressure exceeds a certain value, the hard protection switch is forced to disconnect. However, after disconnection, manual pressure relief is required before the water supply system can resume working, which affects the working efficiency of the water purifier. Utility Model Content

[0004] The purpose of the embodiment of the present application is to provide a water system, by setting a water pressure detection switch in the water system of the water purification equipment, detecting the water pressure signal at the water inlet end of the refrigeration unit through the water pressure detection switch, and controlling the opening and closing of the pressure relief water circuit and the raw water inlet based on the water pressure signal by the control module, thereby achieving the purpose of releasing the water pressure in the water system, and preventing the occurrence of pipe expansion or water leakage due to excessive water pressure.

[0005] The present application provides a water circuit system, comprising: a raw water inlet, a water purification unit, a refrigeration unit, a purified water outlet and a control module; a water pressure detection switch electrically connected to the control module is provided between the water purification unit and the refrigeration unit, the water pressure detection switch is used to detect a water pressure signal at a water inlet end of the refrigeration unit, a pressure relief water circuit is externally connected to the refrigeration unit, and the control module controls the opening and closing of the pressure relief water circuit and the raw water inlet based on the water pressure signal.

[0006] In one embodiment, the pressure relief water circuit includes a regulating valve connected to the water inlet of the refrigeration unit, the regulating valve is connected to the purified water outlet of the water purification unit, and the pressure on the pressure relief water circuit is released through the waste water end of the water purification unit.

[0007] In one embodiment, a purified water outlet waterway is provided between the water purification unit and the refrigeration unit, and the control module controls the water supply direction of the regulating valve based on a water pressure signal to switch the pressure relief waterway and the purified water outlet waterway.

[0008] In one embodiment, the pressure relief water circuit includes a pressure relief device connected to the refrigeration unit, and the pressure relief device is connected to a drain port of the refrigeration unit through a pipeline.

[0009] In one embodiment, the water system also includes a heating unit, which is connected to the clean water outlet through a hot water valve. The pressure relief water circuit includes a two-way valve connected to the water inlet end of the refrigeration unit and the hot water valve, and the pressure on the pressure relief water circuit is released through the clean water outlet.

[0010] In one embodiment, a circulating heating water circuit is provided in the heating unit, a first one-way valve is provided between the circulating heating water circuit and the water purification unit, the hot water valve is provided at the water outlet end of the circulating heating water circuit, and the first one-way valve cooperates with the two-way valve and the hot water valve to form a pressure relief circuit.

[0011] In one embodiment, the circulating heating water circuit includes a water replenishment valve, a heat preservation tank, a water pump, a heating body and a second one-way valve which are sequentially connected to form a loop.

[0012] In one embodiment, the water purification unit includes an inlet valve, a booster pump and a filter element; the inlet valve is connected to the raw water inlet, the booster pump is connected to the inlet valve, the water inlet end of the filter element is connected to the booster pump, and the water outlet end of the filter element is connected to the refrigeration unit.

[0013] In one embodiment, the water outlet end of the filter element is also connected to a waste water valve, and the waste water valve is connected to the waste water end of the water purification unit.

[0014] In one embodiment, the refrigeration unit includes a refrigeration tank and a compressor, the pressure relief water circuit is connected to the refrigeration tank, the compressor is used to cool the refrigeration tank, and the refrigeration tank is connected to the clean water outlet through a water outlet valve.

[0015] Compared with the prior art, the technical solution provided by this application has the following advantages:

[0016] In the present application, a water pressure detection switch is set in the water system of the water purification equipment, and the water pressure signal at the water inlet end of the refrigeration unit is detected by the water pressure detection switch. The control module controls the opening and closing of the pressure relief water circuit and the raw water inlet based on the water pressure signal, thereby achieving the purpose of releasing the water pressure in the water system and preventing the occurrence of pipe expansion or water leakage due to excessive water pressure.

[0017] Secondly, three pressure relief water circuit structures are designed in this application, which can be applied to different water circuit systems in water purification equipment. When the pipeline is detected to be over-pressured, the control module can control the water pressure in the relief water circuit system to avoid expansion or leakage of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application are briefly introduced below.

[0019] Figure 1A schematic diagram of a water system provided in one embodiment of the present application;

[0020] Figure 2 A schematic diagram of a detection circuit of a water pressure detection switch provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a pressure relief waterway provided in the first embodiment of the present application;

[0022] Figure 4 A schematic diagram of a pressure relief waterway provided in the second embodiment of the present application;

[0023] Figure 5 A schematic diagram of a pressure relief water circuit provided in the third embodiment of the present application.

[0024] Reference numerals:

[0025] 1-water system; 10-raw water inlet; 20-water purification unit; 201-water inlet valve; 202-boosting pump; 203-filter element; 204-wastewater valve; 205-wastewater end; 30-refrigeration unit; 301-cold tank; 302-water outlet valve; 303-drain outlet; 40-clean water outlet; 50-water pressure detection switch; 60-pressure relief waterway; 601-regulating valve; 602-pressure relief device; 603-hot water valve; 604-two-way valve; 70-clean water outlet waterway; 80-heating unit; 90-circulating heating waterway; 901-first one-way valve; 902-water replenishment valve; 903-insulation tank; 904-water pump; 905-heating body; 906-second one-way valve. DETAILED DESCRIPTION

[0026] The terms “first”, “second”, “third”, etc. are only used for distinguishing descriptions and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the products of the present application are usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0029] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0030] The technical solution of the present application will be described below in conjunction with the accompanying drawings.

[0031] Please refer to Figure 1 The present application provides a water system 1, comprising: a raw water inlet 10, a water purification unit 20, a refrigeration unit 30, a purified water outlet 40 and a control module; a water pressure detection switch 50 electrically connected to the control module is provided between the water purification unit 20 and the refrigeration unit 30, the water pressure detection switch 50 is used to detect the water pressure signal at the water inlet end of the refrigeration unit 30, the refrigeration unit 30 is externally connected to a pressure relief water circuit 60, and the control module controls the opening and closing of the pressure relief water circuit 60 and the raw water inlet 10 based on the water pressure signal.

[0032] The water system 1 in the present application can be used in water purification equipment, such as a water purifier. Among them, the raw water inlet 10 is used to suck tap water from the water inlet tank into the water system 1 of the water purifier. The water purification unit 20 is used to filter and purify the tap water flowing in from the raw water inlet 10, and obtain pure water after filtering various impurities. The refrigeration unit 30 is used to cool the pure water filtered by the water purification unit 20 to obtain cold water with a lower temperature than the tap water. The purified water after cooling can be discharged through the purified water outlet 40 for user use.

[0033] When the user takes water, if the purified water outlet 40 is blocked or the pipeline is blocked, the water pressure in the water system 1 is too high, and the risk of pipeline expansion or water leakage is easy to occur. Therefore, by setting a water pressure detection switch 50 between the water purification unit 20 and the refrigeration unit 30, the water pressure signal at the water inlet end of the refrigeration unit 30 is detected by the water pressure detection switch 50. When the water pressure detection switch 50 detects that the water pressure signal at the purified water end of the refrigeration unit 30 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module. Based on the water pressure signal, the control module controls the pressure relief waterway 60 connected to the refrigeration unit 30 to open, and controls the raw water inlet 10 to open, so as to release the pressure of the pipeline in the water system 1, so as to prevent the expansion or water leakage of the pipeline caused by excessive water pressure.

[0034] Optional, see Figure 2The water pressure detection switch 50 can be used to detect the water pressure signal at the water inlet end of the refrigeration unit 30. Its working principle is to install a water pressure sensor in the water pressure detection switch 50. When the tap water at the water inlet end of the refrigeration unit 30 acts on the diaphragm of the water pressure sensor, the diaphragm produces a micro-displacement proportional to the water pressure, causing the resistance value of the water pressure sensor to change. The change in the resistance value of the water pressure sensor is used to judge the change in water pressure. When the water pressure exceeds the set range, the water pressure detection switch 50 is disconnected; when the water pressure is within the normal range, the water pressure detection switch 50 is closed, and the water pressure detection switch 50 can withstand high water pressure without damage or leakage. When the water purifier is working, the water pressure detection switch 50 detects the water pressure signal at the water inlet end of the refrigeration unit 30 in real time, and feeds back the detected water pressure signal to the control module. The control module controls the opening and closing of the pressure relief waterway 60 and the raw water inlet 10 based on the water pressure signal to determine whether the pressure relief action needs to be turned on.

[0035] Optional, see Figure 1 The water purification unit 20 includes an inlet valve 201, a booster pump 202 and a filter element 203; the inlet valve 201 is connected to the raw water inlet 10, the booster pump 202 is connected to the inlet valve 201, the water inlet end of the filter element 203 is connected to the booster pump 202, and the water outlet end of the filter element 203 is connected to the refrigeration unit 30.

[0036] In this embodiment, the filter element 203 can be one of an activated carbon filter element, a reverse osmosis filter element, a PP cotton filter element, a ceramic filter element, an ultrafiltration membrane filter element, etc. The filter element 203 can be a multi-stage filter, which is conducive to improving the filtering accuracy.

[0037] The water inlet valve 201 and the booster pump 202 are electrically connected to the control module, respectively, and the control module is used to control the opening and closing of the water inlet valve 201 and the booster pump 202. When the user needs to take low-temperature pure water, the control module controls the water inlet valve 201 to open, and controls the booster pump 202 to start, and the tap water at room temperature flows in through the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and the impurities in the tap water at room temperature are removed by the filtering effect of the filter element 203. The treated pure water at room temperature can flow to the refrigeration unit 30 for refrigeration treatment, and low-temperature pure water is obtained after treatment. At this time, the user can obtain low-temperature pure water with a lower temperature than tap water through the clean water outlet 40.

[0038] Since the wastewater formed after filtering by the filter element 203 needs to be discharged from the water purifier through the discharge channel. Furthermore, the water outlet end of the filter element 203 is also connected to the wastewater valve 204, and the wastewater valve 204 is connected to the wastewater end 205 of the water purification unit. The wastewater valve 204 can be electrically connected to the control module, and its opening and closing are controlled by the control module. When the user takes low-temperature pure water, the control module can control the wastewater valve 204 to be in a closed state. After filtering and refrigeration treatment to obtain low-temperature pure water, the wastewater valve 204 is controlled to open. At this time, the wastewater filtered by the filter element 203 can be discharged from the water purifier by the wastewater end 205 of the water purification unit. Exemplarily, the wastewater end 205 of the water purification unit can be connected to the outside world through a sewer.

[0039] Optional, see Figure 1 The refrigeration unit 30 includes a cold container 301 and a compressor (not shown in the figure), the pressure relief water circuit 60 is connected to the cold container 301, the compressor is used to cool the cold container 301, and the cold container 301 is connected to the clean water outlet 40 through the water outlet valve 302.

[0040] In this embodiment, the refrigeration principle of the compressor is to use the compressor to suck in low-temperature, low-pressure refrigerant, and then compress it into high-temperature and high-pressure refrigerant to increase its temperature, and then transfer the high-temperature and high-pressure refrigerant to the cold tank 301, and discharge the heat in the cold tank 301 by cooling to achieve the purpose of cooling. The water outlet valve 302 can be electrically connected to the control module, and the opening and closing of the water outlet valve 302 can be controlled by the control module; the compressor can be electrically connected to the control module, and the start of the compressor can be controlled by the control module.

[0041] When the user needs to take low-temperature purified water, tap water at room temperature flows in through the raw water inlet 10, the control module controls the water inlet valve 201 to open, and controls the booster pump 202 to start, and at the same time, controls the waste water valve 204 to close and the water outlet valve 302 to close; the normal temperature tap water flows through the water inlet valve 201, the booster pump 202, and the filter element 203, and flows into the cold tank 301 after being filtered by the filter element 203, and the control module controls the compressor to start, and the cold tank 301 is cooled by the compressor refrigeration system, so as to cool the purified water in the cold tank 301, and the temperature of the purified water in the cold tank 301 can be reduced to 5°C at the lowest. Then the control module controls the water outlet valve 302 to open, and the low-temperature purified water after the cooling treatment flows out through the purified water outlet 40 for the user to use.

[0042] Optionally, the purified water outlet 40 may be a water faucet, and the filtered low-temperature purified water may flow directly out of the water faucet.

[0043] Optionally, the control module may be an MCU (Microcontroller Unit; MCU) or a single chip microcomputer of the water system 1 .

[0044] Please refer to Figure 3, which is a schematic diagram of the pressure relief water circuit 60 provided in the first embodiment of the present application. The pressure relief water circuit 60 includes a regulating valve 601 connected to the water inlet end of the refrigeration unit 30, and the regulating valve 601 is connected to the clean water outlet end of the water purification unit 20, and the pressure on the pressure relief water circuit 60 is released through the waste water end 205 of the water purification unit.

[0045] In this embodiment, the regulating valve 601 is optionally a two-way water inlet valve, and the two ends of the regulating valve 601 are respectively connected to the water inlet of the refrigeration unit 30 and the purified water outlet of the water purification unit 20, and the regulating valve 601 is electrically connected to the control module. The water pressure detection switch 50 can be arranged between the regulating valve 601 and the refrigeration tank 301.

[0046] As mentioned above, when the user takes low-temperature pure water, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, controls the regulating valve 601 to open, controls the wastewater valve 204 and the water outlet valve 302 to be closed. At this time, tap water at room temperature flows in through the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and removes impurities in the tap water at room temperature through the filtering effect of the filter element 203. The treated pure water at room temperature flows to the cold tank 301 through the regulating valve 601, and the water pressure in the cold tank 301 continues to increase. When the water pressure detection switch 50 detects that the water pressure signal in the water inlet end pipeline of the cold tank 301 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the water inlet valve 201 to close, the booster pump 202 to stop discharging water, and the regulating valve 601 to close. At this time, the water pressure in the pipeline will be kept suppressed and maintained unchanged. Based on the water pressure signal, the control module controls the regulating valve 601 and the wastewater valve 204 to open. Since there is a pressure difference between the wastewater end 205 of the water purification unit and the water inlet end of the cold tank 301, the low-temperature pure water will pass through the regulating valve 601, the water outlet end of the filter element 203, and the wastewater valve 204, and finally be discharged from the wastewater end 205 of the water purification unit until the water pressure in the pressure relief water circuit 60 reaches equilibrium. The water pressure detection switch 50 detects that the water pressure signal returns to normal, and feeds back the normal water pressure signal to the control module. The control module controls the regulating valve 601 and the wastewater valve 204 to close, and the pressure relief is completed. At this time, the pressure relief water circuit 60 returns to normal.

[0047] For further information, please refer to Figure 3 A purified water outlet waterway 70 is provided between the water purification unit 20 and the refrigeration unit 30 . The control module controls the water supply direction of the regulating valve 601 based on the water pressure signal to switch the pressure relief waterway 60 and the purified water outlet waterway 70 .

[0048] In this embodiment, the outlet pipe from the outlet end of the water purification unit 20 to the refrigeration unit 30 is a purified water outlet waterway 70, and the purified water outlet waterway 70 can be connected to the purified water outlet 40. When the user takes low-temperature purified water, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, and tap water at room temperature flows in through the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and removes impurities through the filtration of the filter element 203 to obtain purified water at room temperature, which flows into the cold tank 301. The water pressure detection switch 50 detects that the water pressure signal in the pipeline at the water inlet end of the cold tank 301 does not exceed the set range, and the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the regulating valve 601 to switch to the purified water outlet waterway 70. The flow direction of the purified water at room temperature is from the cold tank 301 to the regulating valve 601, and then passes through the purified water outlet waterway 70 and is discharged from the purified water outlet 40.

[0049] When the water pressure detection switch 50 detects that the water pressure signal in the pipeline at the water inlet end of the cold tank 301 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the regulating valve 601 to switch to the pressure relief water circuit 60. At the same time, the control module controls the water inlet valve 201 to close, the booster pump 202 to stop discharging water, and the regulating valve 601 to close. The water pressure in the pipeline will be kept suppressed and maintained unchanged. Based on the water pressure signal, the control module controls the regulating valve 601 and the wastewater valve 204 to open. There is a pressure difference between the water pressure of the wastewater end 205 of the water purification unit and the water inlet end pipeline of the cold tank 301, so that the low-temperature pure water passes through the regulating valve 601, the water outlet end of the filter element 203, and the wastewater valve 204, and is discharged from the wastewater end 205 of the water purification unit until the water pressure in the pressure relief water circuit 60 reaches equilibrium. The water pressure detection switch 50 detects that the water pressure signal has returned to normal, and feeds back the normal water pressure signal to the control module. The control module controls the regulating valve 601 and the wastewater valve 204 to close, and the pressure relief is completed. At this time, the pressure relief waterway 60 returns to normal. In this embodiment, the pressure relief principle after the control module controls the regulating valve 601 to switch to the pressure relief waterway 60 based on the water pressure signal is the same as the principle of the aforementioned pressure relief waterway 60. Therefore, based on the water pressure signal at the water inlet end of the refrigeration unit 30, the control module can control the water supply direction of the regulating valve 601 to achieve the switching of the two waterway modes.

[0050] Please refer to Figure 4 , which is a schematic diagram of a pressure relief water circuit 60 provided in the second embodiment of the present application. The pressure relief water circuit 60 includes a pressure relief device 602 connected to the refrigeration unit 30, and the pressure relief device 602 is connected to the drain port 303 of the refrigeration unit 30 through a pipeline.

[0051] In this embodiment, the pressure relief device 602 is electrically connected to the control module, and the water pressure detection switch 50 is arranged between the regulating valve 601 and the cold container 301. Optionally, the pressure relief device 602 can be in the form of a water pump or a drain valve.

[0052] As mentioned above, when the user takes low-temperature pure water, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, controls the regulating valve 601 to open, controls the wastewater valve 204, the water outlet valve 302 and the pressure relief device 602 to be closed. At this time, tap water at room temperature flows in through the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and removes impurities in the tap water at room temperature through the filtering effect of the filter element 203. The treated pure water at room temperature flows to the cold tank 301 through the regulating valve 601, and the water pressure in the cold tank 301 continues to increase. When the water pressure detection switch 50 detects that the water pressure signal in the water inlet end pipeline of the cold tank 301 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the water inlet valve 201 to close, the booster pump 202 to stop discharging water, and the regulating valve 601 to close. At this time, the water pressure in the pipeline will be kept suppressed and maintained unchanged. Based on the water pressure signal, the control module controls the pressure relief device 602 to open. There is a pressure difference between the water pressure in the water inlet end pipeline of the cold tank 301 and the water outlet 303 of the refrigeration unit 30. The low-temperature pure water is discharged from the water outlet 303 of the refrigeration unit 30 through the pressure relief device 602 until the water pressure in the pressure relief waterway 60 reaches a balance. The water pressure detection switch 50 detects that the water pressure signal has returned to normal, and feeds back the normal water pressure signal to the control module. The control module controls the pressure relief device 602 to close, and the pressure relief is completed. At this time, the pressure relief waterway 60 returns to normal. Therefore, in this embodiment, when the water pressure in the water inlet end pipeline of the cold tank 301 is detected to be too high by the water pressure detection switch 50, the control module controls the pressure relief device 602 to open based on the water pressure signal, and the water in the cold tank 301 is discharged from the water outlet 303 of the refrigeration unit 30, thereby releasing the water pressure in the pipeline to prevent the cold tank 301 from expanding or being damaged due to excessive pressure in the cold tank 301.

[0053] In addition to low-temperature purified water, the water purifier can also produce room-temperature water, which is the same temperature as tap water. Figure 5 , which is a schematic diagram of a pressure relief waterway 60 provided in the third embodiment of the present application. The waterway system 1 further includes a heating unit 80 , which is connected to the clean water outlet 40 via a hot water valve 603 .

[0054] In this embodiment, the hot water valve 603 is electrically connected to the control module. When the user takes pure water at room temperature, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, controls the hot water valve 603 to open, and controls the regulating valve 601 and the waste water valve 204 to close. At this time, tap water at room temperature flows in through the raw water inlet 10, and after being filtered by the water inlet valve 201, the booster pump 202, and the filter element 203, it can flow out from the clean water outlet 40 through the hot water valve 603. The water at room temperature taken by the user from the clean water outlet 40 is pure water obtained after various impurities are filtered out by the filter element 203.

[0055] Furthermore, the pressure relief water circuit 60 includes a two-way valve 604 and a hot water valve 603 connected to the water inlet of the refrigeration unit 30 , and the pressure on the pressure relief water circuit 60 is released through the clean water outlet 40 .

[0056] In this embodiment, the two-way valve 604 is electrically connected to the control module, and the water pressure detection switch 50 is arranged between the two-way valve 604 and the cold tank 301. As mentioned above, when the user takes pure water at room temperature, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, controls the two-way valve 604 to open, controls the waste water valve 204, the water outlet valve 302, the pressure relief device 602 and the hot water valve 603 to be closed. At this time, tap water at room temperature flows in from the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and removes impurities in the tap water at room temperature through the filtering effect of the filter element 203. The treated pure water at room temperature flows to the cold tank 301 through the two-way valve 604, and the water pressure in the cold tank 301 continues to increase. When the water pressure detection switch 50 detects that the water pressure signal in the water inlet end pipeline of the cold tank 301 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the water inlet valve 201 to close, the booster pump 202 to stop discharging water, and the two-way valve 604 to close. At this time, the water pressure in the pipeline will be kept pressed and maintained unchanged. Based on the water pressure signal, the control module controls the two-way valve 604 and the hot water valve 603 to open. There is a pressure difference between the water pressure in the water inlet end pipeline of the cold tank 301 and the clean water outlet 40. After the low-temperature pure water passes through the hot water valve 603, it is discharged from the clean water outlet 40 until the water pressure in the pressure relief waterway 60 reaches balance. The water pressure detection switch 50 detects that the water pressure signal returns to normal, and feeds back the normal water pressure signal to the control module. The control module controls the two-way valve 604 and the hot water valve 603 to close, and the pressure relief is completed. The pressure relief waterway 60 returns to normal, and the water taken by the user is filtered and treated normal temperature pure water.

[0057] In addition to being able to produce low-temperature purified water and room-temperature purified water, the water purifier can also produce hot water that is hotter than tap water. Figure 5 A circulating heating water circuit 90 is provided in the heating unit 80 , a first one-way valve 901 is provided between the circulating heating water circuit 90 and the water purification unit 20 , and a hot water valve 603 is provided at the water outlet end of the circulating heating water circuit 90 .

[0058] In this embodiment, the circulating heating water circuit 90 is used to heat the filtered pure water to obtain hot water. The circulating heating water circuit 90 includes a water replenishment valve 902, a heat preservation tank 903, a water pump 904, a heating body 905 and a second one-way valve 906 which are sequentially connected to form a loop. Among them, the first one-way valve 901, the water replenishment valve 902, the heat preservation tank 903, the water pump 904, the heating body 905 and the second one-way valve 906 are all electrically connected to the control module.

[0059] When the user takes hot water, the control module controls the water inlet valve 201 to open, controls the booster pump 202 to start, controls the first one-way valve 901 to open, and controls the two-way valve 604, the wastewater valve 204, and the hot water valve 603 to close. At this time, tap water at room temperature flows in from the raw water inlet 10, flows to the filter element 203 through the water inlet valve 201, and the impurities in the tap water at room temperature are removed by the filtering effect of the filter element 203. The treated pure water at room temperature flows to the water replenishment valve 902 through the first one-way valve 901 and flows into the insulation tank 903 for insulation. The control module controls the water pump 904 to start, and the pure water in the insulation tank 903 is pumped into the heating body 905 for heating treatment. The heated hot water flows to the second one-way valve 906, and the hot water valve 603 is controlled to open. At this time, the hot water flows from the hot water valve 603 to the clean water outlet 40 and is discharged through the clean water outlet 40. The control module can change the speed, lift parameters and flow rate of the water pump 904 by adjusting the pulse width modulation (PWM) of the water pump 904, thereby controlling the outflow of hot water at different temperatures. Optionally, the temperature range of the hot water can be 100°C.

[0060] Furthermore, the first one-way valve 901 cooperates with the two-way valve 604 and the hot water valve 603 to form a pressure relief circuit. The pressure relief circuit in this embodiment can be implemented as follows: the control module controls the water inlet valve 201 to open, controls the boost pump 202 to start, controls the two-way valve 604 to open, controls the first one-way valve 901, the hot water valve 603 to close, and the waste water valve 204 to close, and controls the circulating heating water circuit 90 to be in a disconnected state. At this time, tap water at room temperature flows in from the raw water inlet 10, passes through the water inlet valve 201 and flows to the filter element 203. Impurities in the tap water at room temperature are removed through the filtering effect of the filter element 203, and the treated pure water at room temperature flows into the cold tank 301 through the two-way valve 604, and the water pressure in the cold tank 301 continues to increase. When the water pressure detection switch 50 detects that the water pressure signal in the water inlet end pipeline of the cold tank 301 exceeds the set range, the water pressure detection switch 50 feeds back the water pressure signal to the control module, and the control module controls the water inlet valve 201 to close, the booster pump 202 to stop discharging water, and the two-way valve 604 to close. At this time, the water pressure in the pipeline will be kept pressed and maintained unchanged. Based on the water pressure signal, the control module controls the two-way valve 604, the first one-way valve 901, and the hot water valve 603 to open. There is a pressure difference between the water pressure in the water inlet end pipeline of the cold tank 301 and the clean water outlet 40. After the low-temperature pure water passes through the hot water valve 603, it is discharged from the clean water outlet 40 until the water pressure in the pressure relief waterway 60 reaches balance. The water pressure detection switch 50 detects that the water pressure signal returns to normal, and feeds back the normal water pressure signal to the control module. The control module controls the first one-way valve 901, the two-way valve 604, and the hot water valve 603 to close, and the pressure relief is completed. The pressure relief circuit returns to normal, and the water taken by the user is filtered and treated. Normal temperature pure water.

[0061] In the above three embodiments, the water pressure detection switch 50 is arranged at the water inlet end of the refrigeration unit 30, that is, at the water inlet end of the cold container 301. In other embodiments, the water pressure detection switch 50 can also be arranged at other locations where water production or water intake may cause high pressure in the pipeline. In addition, the water pressure detection switch 50 can also be replaced by a high-pressure switch, or any electronic component suitable for the pressure control system of water household appliances.

[0062] In summary, in the present application, a water pressure detection switch 50 is set in the water system 1 of the water purification equipment, and the water pressure signal at the water inlet end of the refrigeration unit 30 is detected by the water pressure detection switch 50. The control module controls the opening and closing of the pressure relief water circuit 60 and the raw water inlet 10 based on the water pressure signal, thereby achieving the purpose of releasing the water pressure in the water system 1, and preventing the occurrence of pipeline expansion or water leakage due to excessive water pressure.

[0063] Three pressure relief water circuit 60 structures are designed in the present application, which can be applicable to different water circuit systems 1 in water purification equipment. When the pipeline is detected to be over-pressured, the control module can control the water pressure in the relief water circuit system 1 to avoid expansion or leakage of the pipeline.

[0064] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waterway system, comprising: Raw water inlet, water purification unit, refrigeration unit, clean water outlet and control module; characterized in that a water pressure detection switch electrically connected to the control module is provided between the water purification unit and the refrigeration unit, the water pressure detection switch is used to detect the water pressure signal at the water inlet end of the refrigeration unit, the refrigeration unit is externally connected to a pressure relief water circuit, and the control module controls the opening and closing of the pressure relief water circuit and the raw water inlet based on the water pressure signal.

2. The waterway system according to claim 1, characterized in that: The pressure relief water circuit includes a regulating valve connected to the water inlet end of the refrigeration unit, and the regulating valve is connected to the purified water outlet end of the water purification unit, and the pressure on the pressure relief water circuit is released through the waste water end of the water purification unit.

3. The waterway system according to claim 2, characterized in that: A purified water outlet waterway is provided between the water purification unit and the refrigeration unit. The control module controls the water supply direction of the regulating valve based on a water pressure signal to switch the pressure relief waterway and the purified water outlet waterway.

4. The waterway system according to claim 1, characterized in that: The pressure relief water circuit includes a pressure relief device connected to the refrigeration unit, and the pressure relief device is connected to a drain port of the refrigeration unit through a pipeline.

5. The waterway system according to claim 1, characterized in that: The water system also includes a heating unit, which is connected to the clean water outlet through a hot water valve. The pressure relief water circuit includes a two-way valve connected to the water inlet end of the refrigeration unit and the hot water valve, and the pressure on the pressure relief water circuit is released through the clean water outlet.

6. The waterway system according to claim 5, characterized in that: A circulating heating water circuit is provided in the heating unit, a first one-way valve is provided between the circulating heating water circuit and the water purification unit, the hot water valve is provided at the water outlet end of the circulating heating water circuit, and the first one-way valve cooperates with the two-way valve and the hot water valve to form a pressure relief circuit.

7. The waterway system according to claim 6, characterized in that: The circulating heating water circuit comprises a water replenishment valve, a heat preservation tank, a water pump, a heating body and a second one-way valve which are sequentially connected to form a loop.

8. The waterway system according to claim 1, characterized in that: The water purification unit includes an inlet valve, a booster pump and a filter element; the inlet valve is connected to the raw water inlet, the booster pump is connected to the inlet valve, the water inlet end of the filter element is connected to the booster pump, and the water outlet end of the filter element is connected to the refrigeration unit.

9. The waterway system according to claim 8, characterized in that: The water outlet end of the filter element is also connected to a waste water valve, and the waste water valve is connected to the waste water end of the water purification unit.

10. The waterway system according to claim 1, characterized in that: The refrigeration unit comprises a refrigeration tank and a compressor, the pressure relief water circuit is connected to the refrigeration tank, the compressor is used to cool the refrigeration tank, and the refrigeration tank is connected to the clean water outlet through a water outlet valve.

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