CN221375942U - Water heater for purifying water - Google Patents

Abstract

The utility model belongs to the technical field of water supply, and particularly discloses a purified water heater which comprises a hot water device, a filtering device and a concentrated water filtering module, wherein the hot water device comprises a cold water pipe, a heating main body and a hot water pipe which are sequentially connected, the filtering device is provided with a filter element, a raw water inlet, a pure water outlet and a concentrated water outlet, the raw water inlet is communicated with the cold water pipe through a filtering water inlet pipe, the pure water outlet is connected with a drinking water end, and the concentrated water outlet is communicated with the hot water pipe through a drain pipe. The clean water heater disclosed by the utility model can save water resources, reduce the probability of scale generation of the heating main body, reduce the probability of blockage of the heating main body and improve the use reliability of the clean water heater.

Description

Water heater for purifying water

Technical Field

The utility model relates to the technical field of water supply, in particular to a water purifying and drinking water heater.

Background

The water purifying and drinking water heater is one integrated water heater for preparing hot water for bathing and water purifier for preparing drinking water to realize the integrated setting of water supply equipment and to reduce the occupied area of the water supply equipment.

The cold water inlet ends of the hot water device and the water purifying device are connected into the same cold water supply end. Because the water purifying device can simultaneously generate concentrated water containing more heavy metals when preparing pure water, in order to reduce the waste of water resources, the generated concentrated water in the existing purified water heater is discharged into a cold water pipe of the water heating device, and is supplied to a water end for bathroom after being heated by the hot water supplying device.

However, because the concentrated water contains more heavy metals, the concentrated water is discharged into the cold water pipe, and water resources can be saved, but the concentrated water is easy to generate sediment in the heating main body in the heating process, and scale is easy to be formed in the heat exchange main body after long-time use, so that the heating efficiency is affected, and even the heat exchange main body is blocked, so that the normal use of the water heater is affected.

Disclosure of utility model

The utility model aims to provide a clean water heater, which can effectively solve the problem that scale is easy to generate when the concentrated water is heated due to the fact that the concentrated water of the existing clean water heater is discharged into a cold water pipe in a water heating device, reduce the blockage probability of the water heating device and improve the use reliability of the clean water heater.

The first technical problem is solved by the following technical scheme:

The utility model provides a clean water heater, includes hot water system, hot water system is including cold water pipe, heating main part and the hot-water line that connects gradually, clean water heater still includes filter equipment, filter equipment has filter core, raw water inlet, pure water export and dense water export, the filter core is used for filtering follow the water that raw water inlet flowed in and produces pure water, raw water inlet with cold water pipe passes through filtering the inlet tube intercommunication, pure water export is connected with the drinking water end, dense water export with the hot-water line passes through the drain pipe intercommunication.

Compared with the background technology, the water purifying and drinking water heater has the following beneficial effects: through setting up hot water system and purifier for hot water system can be used for producing life hot water, and purifier can produce the drinking water of direct drinking, enriches the function of water heater of clean drinking, promotes the use experience of water heater of clean drinking; the concentrated water is directly discharged into the hot water pipe through the filtering device, the problem that scale is easy to generate caused by the fact that the discharged concentrated water is directly heated by the heating main body is avoided while the water resource waste is reduced, the probability of generating scale inside the heating main body is reduced, the probability that the heating main body is blocked is reduced, the heating efficiency of the heating main body is guaranteed, and the use safety and reliability of the water purifying and drinking water heater are improved.

In one embodiment, the purified water heater further comprises a concentrated water filtering module, wherein the concentrated water filtering module comprises a water tank and a filtering carbon rod arranged in the water tank, the water tank is provided with a tank water inlet and a tank water outlet, and the tank water inlet and the tank water outlet are connected in series and connected into the drain pipe.

In one embodiment, the drain pipe is provided with a filter pipe section positioned between the water outlet of the tank body and the hot water pipe, and a drain check valve is arranged on the filter pipe section and only allows water in the drain pipe to drain to the hot water pipe.

In one embodiment, a bypass pipe is connected between the filter pipe section and the filter water inlet pipe, and one end of the bypass pipe connected with the filter pipe section is located between the drain check valve and the water tank.

In one embodiment, a bypass pipe is connected between the drain pipe and the filtering water inlet pipe, and one end of the bypass pipe connected with the drain pipe is located between the drain check valve and the water tank.

In one embodiment, the filtering water inlet pipe is provided with a filtering switch valve and a booster pump, the filtering switch valve is located between the bypass pipe and the filtering device, and the booster pump is located between the filtering switch valve and the filtering device.

In one embodiment, the filtering water inlet pipe is provided with a water inlet one-way valve, the water inlet one-way valve is located between the bypass pipe and the cold water pipe, and the water inlet one-way valve only allows water to flow from the water inlet end of the filtering water inlet pipe to the junction of the bypass pipe and the filtering water inlet pipe.

In one embodiment, the drain pipe is provided with a concentrated water pipe section positioned between the water inlet of the tank body and the concentrated water outlet, the concentrated water pipe section is detachably connected with the water inlet of the tank body, and a concentrated water switch valve is arranged on the concentrated water pipe section.

In one embodiment, a hot water temperature detector is arranged on the hot water pipe, and the hot water temperature detector is positioned downstream of the junction of the water draining pipe and the hot water pipe.

In one embodiment, the cold water pipe comprises a cold water main pipe and a heating water inlet pipe, the water outlet end of the cold water main pipe is connected with the heating water inlet pipe and the water inlet end of the filtering water inlet pipe, the water outlet pipe is communicated with the heating water inlet pipe, and the heating water inlet pipe is provided with a cold water inlet flowmeter.

In one embodiment, the water inlet of the tank body is arranged at the upper end of the water tank, and the water outlet of the tank body is arranged at the bottom of the water tank.

Drawings

Fig. 1 is a schematic structural diagram of a water purifier according to an embodiment of the present utility model.

Description of the reference numerals:

100. A water purifying device; 200. a water heating device; 210. a cold water pipe; 211. a cold water main pipe; 212. heating the water inlet pipe; 220. heating the body; 230. a hot water pipe; 240. a cold water inlet flowmeter; 250. a cold water temperature detector; 260. a hot water temperature detector; 270. a pumping assembly; 271. a blower; 272. a smoke exhaust pipe;

1. A filtering device; 2. filtering the water inlet pipe; 3. a pure water pipe; 4. a filter switch valve; 5. a booster pump; 6. a dense water filtering module; 61. a water tank; 62. a filter carbon rod; 7. a water inlet one-way valve; 8. a drain pipe; 81. a concentrated water pipe section; 82. a filter tube section; 9. a concentrated water switch valve; 10. a pure water one-way valve; 20. a drain check valve; 30. a bypass pipe; 40. a pressure switch; 50. and a drinking water end.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The embodiment provides a clean water heater, and it can be when supplying with living hot water such as bathroom water, realizes the supply to drinking water, and reduces the water waste, promotes the hot water quality of supplying water of articles for daily use, improves the use experience of clean water heater.

As shown in fig. 1, the purified water heater includes a water heating device 200, a water purifying device 100, and a controller, wherein the water heating device 200 is used for preparing domestic hot water such as bathroom water, the water purifying device 100 is used for filtering tap water to generate drinking water for direct drinking, and the controller is used for controlling the operation of the water heating device 200 and the water purifying device 100.

Specifically, the hot water apparatus 200 includes a cold water pipe 210, a heating body 220, and a hot water pipe 230 connected in sequence, the heating body 220 being for heating cold water entered from the cold water pipe 210 and allowing the heated water to flow out of the hot water pipe 230 to be supplied to a domestic water end; the water purifying apparatus 100 includes a filtering apparatus 1, the filtering apparatus 1 having a raw water inlet communicating with the cold water pipe 210 through the filtering water inlet pipe 2, a pure water outlet communicating with the drinking water end 50 for supplying filtered pure water to the drinking water end 50, and a concentrated water outlet communicating with the hot water pipe 230 through the water discharge pipe 8.

According to the purified water heater provided by the embodiment, the water heater 200 and the water purifying device 100 are arranged, so that the water heater 200 can be used for generating domestic hot water, the water purifying device 100 can generate drinking water for direct drinking, the functions of the purified water heater are enriched, and the use experience of the purified water heater is improved; the concentrated water generated by the filtering device 1 is directly discharged into the hot water pipe 230, so that the problem that scale is easy to generate due to the fact that the discharged concentrated water is directly heated by the heating main body 220 is avoided while the water resource waste is reduced, the probability of generating scale inside the heating main body 220 is reduced, the probability of blocking the heating main body 220 is reduced, the heating efficiency of the heating main body 220 is ensured, and the use safety and reliability of the water purifying and drinking water heater are improved.

In an embodiment, the purified water heater further comprises a concentrated water filtering module 6, the concentrated water filtering module 6 comprises a water tank 61 and a filter carbon rod 62 arranged in the water tank 61, the water tank 61 is provided with a tank water inlet and a tank water outlet, the filter carbon rod 62 is used for filtering heavy metals in water, and the tank water inlet and the tank water outlet are connected in series into the drain pipe 8.

Through inserting jar body water inlet and jar body delivery port in series in drain pipe 8, and be provided with filter carbon rod 62 in water pitcher 61 for from the dense water of dense water outlet discharge entering into water pitcher 61, and can filter by filter carbon rod 62 in the water pitcher 61, in order to reduce the heavy metal content in the water that flows out water pitcher 61, thereby make the water that enters into in hot-water line 230 be the water after being filtered by filter carbon rod 62, heavy metal content is less, promotes the water supply quality of hot water device 200 from this, promotes user's use experience.

In order to improve the drainage convenience of the water tank 61 and ensure the filtering effect of the water in the water tank 61, in an embodiment, the water inlet of the tank body is positioned at the upper end of the water tank 61, and the water outlet of the tank body is arranged at the bottom of the tank body, so that the distance between the water inlet of the tank body and the water outlet of the tank body can be increased, and the water flowing into the water inlet of the tank body can flow out to the water outlet of the tank body after being filtered by the filter carbon rod 62 sufficiently, thereby ensuring the filtering efficiency of the water; furthermore, the water outlet of the tank body is arranged at the bottom of the water tank 61, which is also beneficial to discharging the water in the water tank 61.

The filter carbon rod 62 is preferably arranged vertically, so that the filter carbon rod 62 can be flushed when water flows from the water inlet to the water outlet of the tank body, the contact area between the water flow and the filter carbon rod 62 is increased, and the filtering effect on the water is further ensured. The filter carbon rods 62 are preferably provided at least two at intervals to further increase the filtering effect.

The drain pipe 8 has a concentrated water pipe section 81 between the tank water inlet and the concentrated water outlet, and a filter pipe section 82 between the hot water pipe 230 and the tank water outlet. In one embodiment, the drain pipe 8 is preferably detachably connected to the water tank 61, so that the concentrate filtration module 6 can be detached from the drain pipe 8 as a whole, thereby improving the convenience of cleaning and replacement of the concentrate filtration module 6. Specifically, the concentrate line segment 81 and the filter line segment 82 are both detachably connected to the water tank 61.

The concentrated water pipe section 81 is also provided with a concentrated water switch valve 9, and the concentrated water switch valve 9 is used for controlling the on-off of the concentrated water pipe section 81. Through setting up dense water ooff valve 9, can realize the maintenance to the pipeline that water pitcher 61 is located better, there is the rivers from dense water pipe section 81 to water pitcher 61 when avoiding water pitcher 61 to overhaul, improves maintenance convenience and security.

In an embodiment, the concentrate switch valve 9 is a normally open switch valve, so as to ensure that the concentrate pipe section 81 is always in a conducting state when the water purifying and drinking water heater is in a normal use state, and concentrate in the filtering device 1 can be smoothly discharged into the water tank 61 through the concentrate pipe section 81. The concentrated water switch valve 9 is preferably an electromagnetic valve, and the concentrated water switch valve 9 is in communication connection with the controller, so that the automation of the opening and closing of the concentrated water switch valve 9 is improved, and the automation degree of the water heater is improved. In other embodiments, the concentrate switch valve 9 may be a mechanical valve, i.e. the user may manually control the on/off of the concentrate switch valve 9 according to needs, thereby reducing the cost of the concentrate switch valve 9.

The filter tube section 82 is provided with a drain check valve 20, and the drain check valve 20 allows only water in the drain tube 8 to drain toward the hot water tube 230, thereby preventing water in the hot water tube 230 from flowing back into the water tank 61.

In an embodiment, the water purifying apparatus 100 further includes a bypass pipe 30, wherein the bypass pipe 30 is connected between the filter tube 82 and the filter water inlet pipe 2, that is, the water filtered by the filter carbon rod 62 in the water tank 61 flows to the hot water pipe 230 through the filter tube 82, and flows to the filter water inlet pipe 2 through the filter tube 82 and the bypass pipe 30, so as to flow to the filter apparatus 1 again for filtering. The end of the bypass pipe 30 connected to the filter tube section 82 is located between the drain check valve 20 and the water tank 61.

Above-mentioned setting for when purifier 100 is running, the water that the jar body delivery port flows out can flow to filter equipment 1 through filter tube section 82 and bypass pipe 30 and filter repeatedly, when purifier 100 and hot water system 200 use simultaneously, jar body delivery port exhaust water can be discharged to heating inlet tube 212 through filter tube section 82, be used for domestic water supply, thereby need not to set up the pipeline that is used for directly discharging the water of jar body delivery port to outside, effectively promote the reuse to the dense water, also avoid simultaneously that the water in the water pitcher 61 flows to filter equipment 1 all the time and is filtered the problem that filter carbon stick 62 life reduces that a lot of results in by the repeated filtration.

The filtering water inlet pipe 2 is provided with a filtering switch valve 4, the filtering switch valve 4 is connected with the controller in a communication way, and the filtering switch valve 4 is used for controlling the on-off of the filtering water inlet pipe 2, namely controlling whether the filtering device 1 filters or not. In an embodiment, the filter switching valve 4 is located between the junction of the bypass pipe 30 and the filter inlet pipe 2 and the filter device 1. This kind of setting, when filter on-off valve 4 is in the closed state, can be through supplying water to cold water pipe 210 for cold water passes through cold water header 211, filtration inlet tube 2, bypass pipe 30, water pitcher 61, dense water pipe section 81 and dense water export in proper order and gets into filter equipment 1 in order to back flush the filter core, avoids impurity to pile up and causes the jam to the filter core, promotes filter equipment 1's long-term performance.

In an embodiment, the filter inlet pipe 2 is provided with a water inlet check valve 7, the water inlet check valve 7 is located between the cold water pipe 210 and the bypass pipe 30, that is, the water inlet check valve 7 is located between the water inlet end of the filter inlet pipe 2 and the junction of the bypass pipe 30 and the filter inlet pipe 2, and the water inlet check valve 7 only allows water flowing from the cold water pipe 210 to flow to the junction of the filter inlet pipe 2 and the bypass pipe 30, so as to prevent water flowing out from the bypass pipe 30 from flowing into the cold water pipe 210 directly through the filter inlet pipe 2.

In order to improve the power effect of the filtering device 1, in an embodiment, the filter element of the filtering device 1 is a composite filter element, the filtering effect is better, the filtering efficiency is high, the filtering device 1 with the composite filter element is an existing mature product, and the structure of the filtering device 1 is not limited in this embodiment. In an embodiment thereof, the filter element of the filter device 1 may also be a reverse osmosis filter element.

In an embodiment, the filtering water inlet pipe 2 is further provided with a booster pump 5, the booster pump 5 is located at the downstream of the filtering switch valve 4, and the booster pump 5 is used for increasing the water inlet pressure of the filtering device 1, so as to improve the impact pressure on the filter element in the filtering device 1, and improve the filtering efficiency and the water inlet flow of the filtering device 1.

In one embodiment, the pure water outlet is connected to the drinking water end 50 through the pure water pipe 3, and the pure water pipe 3 is provided with a pure water check valve 10, and the pure water check valve 10 allows pure water to flow to the drinking water end 50. The setting of pure water check valve 10 can avoid out pure water refluence to filter equipment 1 in and cause the reverse scouring to the filter core, guarantees filter equipment 1 internal pressure's stability to guarantee filter equipment 1's filter effect and life.

Further, the pure water pipe 3 is also provided with a pressure switch 40, the pressure switch 40 is positioned between the pure water one-way valve 10 and the drinking water end 50, and the pressure switch 40 is in communication connection with the controller. The pressure switch 40 is used to detect the pressure on the pure water pipe 3, so as to determine whether the drinking water end 50 is opened. Since the water pressure of the pure water pipe 3 is reduced when the drinking water end 50 is opened, when the pressure switch 40 detects that the pressure value is lower than the preset starting pressure value, it is determined that the drinking water end 50 has water consumption, and the controller can control the water purifying device 100 to start to operate; when the user closes the potable water end 50, the water pressure in the pure water pipe 3 increases, and when the pressure switch 40 detects that the water pressure in the pure water pipe 3 is greater than a preset closing pressure, the controller controls the water purifying apparatus 100 to be turned off.

In one embodiment, the water heating device 200 is a gas water heater. The heating body 220 includes a combustion assembly including a burner, a gas pipe for supplying gas to the burner, and a gas valve provided on the gas pipe for controlling a supply amount of the gas, and a heat exchanging device; the heat exchange device is arranged above the burner, the water inlet end of the heat exchange device is connected with the cold water pipe 210, the water outlet end of the heat exchange device is connected with the hot water pipe 230, and after cold water enters the heat exchange device from the cold water pipe 210, the heat exchange device exchanges heat with high-temperature flue gas generated by combustion of fuel gas, so that water flowing through the heat exchange device is heated, and the heated water flows out of the hot water pipe 230. The water heating apparatus 200 further comprises a pumping and exhausting assembly 270, wherein the pumping and exhausting assembly 270 comprises a fan 271 and a smoke exhaust pipe 272, and the fan 271 is used for enabling smoke generated by combustion to flow upwards through the heat exchange device and then be exhausted from the smoke exhaust pipe 272.

The cold water pipe 210 comprises a cold water main 211 and a heating water inlet pipe 212, wherein the water outlet end of the cold water main 211 is respectively communicated with the heating water inlet pipe 212 and the filtering water inlet pipe 2, and the water outlet end of the heating water inlet pipe 212 is connected with the heating main body 220. The heating water inlet pipe 212 is preferably provided with a cold water inlet flowmeter 240, the cold water inlet flowmeter 240 is in communication connection with the controller, and the cold water inlet flowmeter 240 is used for detecting the flow entering the heating main body 220, so that whether the heating main body 220 needs to be started or not can be judged according to the flow of the water inlet of the heating main body 220, and frequent starting of the heating main body 220 when small-flow water is used at the domestic water end is avoided.

When the gas water heater is started, when the water flow detected by the cold water inlet flow meter 240 reaches the preset starting water flow, and when a water flow signal is received, the fan 271 starts to operate after the gas water heater is pre-checked, a gas valve of the gas water heater is opened to work, the gas water heater adjusts the heat load and the wind speed according to the set water temperature, and the optimal air and gas mixing is matched.

It should be noted that the gas water heater may be a conventional non-condensing gas water heater, that is, only includes a main heat exchanger through the heat exchange device, or may be a condensing gas water heater, that is, the gas water heater may include at least a main heat exchanger and a condensing heat exchanger, the flue gas flows through the main heat exchanger and the condensing heat exchanger in sequence, and the water flowing through the cold water pipe 210 flows to the hot water pipe 230 after sequentially passing through the condensing heat exchanger and the main heat exchanger. The specific structure of the gas water heater can be set with reference to the prior art, which is not the focus of the present utility model and will not be described herein.

In other embodiments, the water heating device 200 is an electric water heater, i.e. the heating body 220 is an electric heating liner. In yet another embodiment, the water heating apparatus 200 is a gas wall-mounted boiler.

To better control the operation of the water heater, in one embodiment, the cold water manifold 211 is provided with a cold water temperature sensor 250, and the cold water temperature sensor 250 is communicatively connected to the controller, and the cold water temperature sensor 250 is configured to detect the temperature of the cold water entering the cold water manifold 211, so that the controller can regulate the operation of the water heater 200 according to the temperature of the cold water entering the water heater and the target heating temperature of the water heater 200.

Further, the hot water pipe 230 is further provided with a hot water temperature detector 260, and the hot water temperature detector 260 is in communication connection with the controller, and the hot water temperature detector 260 is used for detecting the temperature of water flowing out of the heating main body 220, so as to determine whether the outlet water of the hot water device 200 reaches the target water temperature, and enable the controller to regulate and control the operation of the heating main body 220 according to the detected value of the hot water temperature detector 260 and the target water temperature value.

The communication position between the water discharge pipe 8 and the hot water pipe 230 is located between the heating main body 220 and the hot water temperature detector 260, so that the water temperature detected by the hot water temperature detector 260 is the mixed water temperature, the water outlet temperature of the hot water pipe 230 is effectively ensured to meet the target water temperature, and the use reliability of the water heating device 200 is improved.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a clean water heater, includes hot water system (200), hot water system (200) are including cold water pipe (210), heating main part (220) and hot-water line (230) that connect gradually, its characterized in that, clean water system still includes filter equipment (1), filter equipment (1) have filter core, raw water inlet, pure water export and dense water export, the filter core is used for filtering follow raw water inlet inflow water and produces pure water, raw water inlet with cold water pipe (210) are through filtering inlet tube (2) intercommunication, pure water export is connected with drinking water end (50), dense water export with hot-water line (230) are through drain pipe (8) intercommunication.

2. The water purifier according to claim 1, further comprising a concentrate filtration module (6), the concentrate filtration module (6) comprising a water tank (61) and a filter carbon rod (62) arranged in the water tank (61), the water tank (61) having a tank water inlet and a tank water outlet, the tank water inlet and the tank water outlet being connected in series into the drain pipe (8).

3. A water purifier according to claim 2, wherein the drain pipe (8) has a filter section (82) between the tank outlet and the hot water pipe (230), the filter section (82) being provided with a drain check valve (20), the drain check valve (20) allowing only water in the drain pipe (8) to drain to the hot water pipe (230).

4. A water purification heater according to claim 3, characterized in that a bypass pipe (30) is connected between the filter pipe section (82) and the filter inlet pipe (2), the end of the bypass pipe (30) connected to the filter pipe section (82) being located between the drain check valve (20) and the water tank (61).

5. The water purifier according to claim 4, wherein the filter inlet pipe (2) is provided with a filter switch valve (4) and a booster pump (5), the filter switch valve (4) being located between the bypass pipe (30) and the filter device (1), the booster pump (5) being located between the filter switch valve (4) and the filter device (1).

6. The water purifier according to claim 4, characterized in that the filter inlet pipe (2) is provided with a water inlet one-way valve (7), the water inlet one-way valve (7) being located between the bypass pipe (30) and the cold water pipe (210), the water inlet one-way valve (7) allowing only water flow from the water inlet end of the filter inlet pipe (2) to the junction of the bypass pipe (30) and the filter inlet pipe (2).

7. Purified water heater according to claim 2, characterized in that the drain pipe (8) has a concentrate pipe section (81) between the tank water inlet and the concentrate outlet, the concentrate pipe section (81) being detachably connected to the tank water inlet, the concentrate pipe section (81) being provided with a concentrate on-off valve (9).

8. The water purifier according to any one of claims 1-7, wherein a hot water temperature detector (260) is provided on the hot water pipe (230), the hot water temperature detector (260) being located downstream of the junction of the water drain pipe (8) and the hot water pipe (230).

9. The water purifier according to any one of claims 1-7, wherein the cold water pipe (210) comprises a cold water main pipe (211) and a heating water inlet pipe (212), the water outlet end of the cold water main pipe (211) is connected with the water inlet ends of the heating water inlet pipe (212) and the filtering water inlet pipe (2), the water outlet pipe (8) is communicated with the heating water inlet pipe (212), and a cold water inlet flowmeter (240) is arranged on the heating water inlet pipe (212).

10. The water purifier according to any one of claims 2-7, wherein the tank water inlet is arranged at the upper end of the water tank (61) and the tank water outlet is arranged at the bottom of the water tank (61).