CN204612195U - siphon descaling type solar water heater - Google Patents

Abstract

The utility model discloses a siphon descaling type solar water heater, which comprises a water tank, a water supply pipe, a plurality of heat collecting pipes, a shower/water supply valve, and a siphon descaling type descaling mechanism. The scale removal mechanism includes a number of scale suction pipes, scale collection pipes, scale discharge pipes, and scale discharge/recoil valves. The dirt collection pipe is fixed across the upper part of the water tank and is provided with a number of interfaces connecting several dirt suction pipes. One end of the dirt collection pipe is closed, and the other end extends out of the water tank to connect to the dirt discharge pipe and finally to the scale discharge/recoil valve. The scale discharge/recoil valve is a three-position three-way valve, its I port is connected to the scale discharge pipe, its II port is connected to the atmosphere, and its III port is connected to the tap water pipe. One end of each dirt suction pipe is inserted into one of the heat collecting pipes and is close to the bottom of the corresponding heat collecting pipe, while the other end is connected to one of the interfaces of the dirt collecting pipe. The inlet of the suction pipe is higher than the outlet of the descaling/recoil valve.

Description

Siphon descaling solar water heater

technical field

The utility model relates to a water heater, in particular to a siphon descaling solar water heater.

Background technique

With its energy saving, environmental protection, convenience, and cheap features, solar water heaters have become the first choice for bathing in millions of households, but the scale problem has plagued users.

After the solar water heater is used for a period of time, various substances will be deposited on the bottom of the heat collecting tube and the inner wall of the water tank. They are mainly composed of calcium and magnesium compounds, silt, rust sediment, bacteria and algae, etc., which are generally referred to as scale. The scale problem is particularly prominent in areas where groundwater is used as the water source or where the water hardness is high.

When the scale is born, it is generally a porridge-like suspension. If it accumulates for a long time, it will gradually form a brittle scale; in the heat collecting tube due to the high temperature, the scale will gradually harden; Near the interface with the air, due to the high temperature baking, the scale will become hard and adhere to the inner wall of the heat collecting tube, which is extremely difficult to remove.

After the scale is generated, first, the heat transfer efficiency is reduced, resulting in a decline in the heat collection effect; second, the effective volume of the water heater is occupied, so that the water storage capacity becomes less and less; third, the heat collection tube may burst due to local overheating of the glass tube, which affects the use , Increase the cost of use; Fourth, the long-term high temperature of the sediment produces many harmful substances, which affects the health of users. Therefore, it must be descaled frequently.

Over the years, the technical circles have been exploring descaling methods for solar water heaters, including chemical methods, mechanical methods, magnetization methods, ion exchange methods, sacrificial anode methods, and so on. These methods have their own advantages and disadvantages: or the system is complicated, or the cost is high, or the maintenance is troublesome, or the descaling effect is limited, or the environment is polluted. At present, the most adopted method is dismantling and descaling, that is, manual dismantling of heat collecting tubes and water tanks, and mechanical removal of scale. This method is more thorough in cleaning, but the operation is complicated, the labor cost is high, and it may damage the glass heat collecting tube and the seal of the water tank. It should not be done frequently, which will lead to the long-term existence and accumulation of scale in the water heater.

The ideal solar water heater descaling method should be simple in structure, cheap, easy to operate, easy to overhaul, save energy and water, have no environmental pollution, and do not need to dismantle equipment. Its effect should be able to frequently and effectively remove scale, prevent its accumulation, agglomeration and hardening; or at least be able to significantly reduce the rate of scale accumulation and prolong the period of dismantling and descaling.

The following are two existing patented technologies for automatic descaling of solar water heaters.

The announcement number of "Automatic descaling device for solar collector tubes" is CN02230170, the announcement date is 20030305, and the IPC classification number is F28G9/00. As shown in Figure 1, the structural points of the automatic descaling device for solar collector tubes are as follows: a water pipe 3 connected to the water inlet pipe 5 is arranged in the heat preservation inner barrel 4, the other end of the water pipe 3 is closed, and the water pipe 3 is connected to the other end Stretch into the water flow pipe 2 at the bottom of the heat collecting pipe 1. Because the utility model is installed, when adding water, under the current effect of larger pressure, the water turns over the fouling from the bottom of the heat collecting tube 1 to the insulation bucket 4 li. When using hot water, fouling flows out with water in the insulation bucket 4.

The shortcoming of this patent technical scheme is:

1. Due to the long time difference between filling cold water and using hot water, when hot water is used, most of the scale that has been turned inward from the heat collecting tube 1 to the heat preservation bucket 4 has been re-settled into the In the heat collecting pipe 1 and the bottom of the heat preservation barrel 4, the scale that can be discharged with hot water is very limited;

2. Scale removal at the same time when hot water is used, which means that the scale may be discharged through the shower head, which may cause serious nozzle hole blockage;

3. Since the scale concentration in the water of the thermal insulation tank 4 is low, the water consumption required for scale removal is relatively large.

The announcement number of "An Automatic Descaling Vacuum Tube Solar Water Heater" is CN200946936, the publication date is 20070912, and the IPC classification number is F24J2/46. As shown in Figure 2, the automatic descaling vacuum tube solar water heater includes a water storage tank 1 equipped with an inlet and outlet pipe 8 and an overflow pipe 9, a heat collecting pipe 2, a connected scale discharge pipe 3 and a scale discharge leather pipe 4, and the inner and outer pipes are vacuumed. The upper end of the heat collecting pipe 2 is connected with the water storage tank 1, and the lower end is connected with the connecting port of the connecting pipe 5 to connect the scale discharge pipe 3; Dirt pipe 3 left ends are closed, and the right end is plugged in 4 one ends of dirt-leaking leather pipe. Scale discharge valve 7 is housed on the dirt discharge leather pipe 4.

The shortcoming of this patent technical scheme is:

1. The glass heat collector tube 2 that runs through both ends is more difficult and expensive to manufacture than the conventional blind tube glass heat collector tube 2;

2. Both ends of the heat collecting tube 2 need to be water-sealed, which increases the technical difficulty and increases the risk of water leakage;

3. When the scale is first formed, it is generally a porridge-like suspension, which is easy to be discharged from the 3rd channel of the scale release pipe. However, if it accumulates for a long time, the scale will gradually agglomerate, block the scale discharge pipe downward, and cause partial or entire scale discharge circuit to fail.

Utility model content

The utility model provides a siphon descaling type solar water heater for avoiding the disadvantages of the above-mentioned prior art, which can automatically remove the scale in the heat collecting tube and the water tank during normal use, so as to solve the problem of conventional solar water heaters. dirt problem.

The utility model is realized through the following technical solutions: a siphon descaling type solar water heater, which includes a water tank (6), an upper water pipe (8), a return water pipe (15), several heat collecting pipes (7), a shower/water supply Valve (10), siphon descaling type descaling mechanism; heat collecting pipe (7) is installed in the bottom of water tank (6) and communicates with water tank (6); ), and the other end stretches into the water tank (6); the shower/water supply valve (10) is a three-terminal combination valve, and its three ports are respectively connected to the tap water pipe (11), the water supply pipe (8) and shower head;

The siphon descaling type solar water heater includes a siphon descaling type descaling mechanism, and the descaling mechanism includes several scale suction pipes (1), scale collection pipes (2), scale discharge pipes (4), scale discharge/reverse Punch valve (5);

The dirt collection pipe (2) is fixed across the upper part of the water tank (6). The dirt collection pipe (2) is provided with several interfaces for connecting several dirt suction pipes (1). One end of the dirt collection pipe (2) is closed, and the dirt collection pipe (2) The other end of the pipe (2) protrudes from the water tank (6) and connects to the descaling pipe (4), and connects to the descaling/recoil valve (5) through the descaling pipe (4);

The scale discharge/recoil valve (5) is a three-position three-way valve, its I port is connected to the scale discharge pipe (4), its II port is connected to the atmosphere, and its III port is connected to the tap water pipe (11);

One end of each dirt suction pipe (1) is inserted into one of the heat collecting pipes (7) and is close to the bottom of the corresponding heat collecting pipe (7), while the other end is connected to one of the interfaces of the dirt collecting pipe (2);

Among them, when the handle of the scale discharge/recoil valve (5) is at the "0" position, it is used as a closed position, and the three ports of the scale discharge/recoil valve (5) are not connected to each other; when the handle is at the "1" position, it is used as a scale discharge When the handle is at the "2" position, it is used as the recoil position, and the ports I-III are connected to supply recoil water to the scale discharge pipe (4); The inlet of the pipe (1) is higher than the outlet of the scaling/backflush valve (5) so that there is a water level difference with the outlet of the scaling/backflush valve (5).

As a further improvement of the above solution, the descaling mechanism also includes a descaling pipe (8-1); the descaling pipe (8-1) is a Y-shaped blind pipe installed on the lower side of the water tank (6) One end of the descaling pipe (8-1) is connected to the water inlet and the upper water pipe (8), while the other two ends are closed, and a certain number of spray nozzles are arranged on the lower side of the pipe wall of the descaling pipe (8-1). Water holes (8-2).

Preferably, the descaling pipe (8-1) is a symmetrically arranged Y-shaped dead pipe.

As a further improvement of the above scheme, the descaling mechanism also includes a combination control valve (3), a three-way scale discharge pipe (4-1); the three-way scale discharge pipe (4-1) is connected to the scale collection pipe (2) On the pipeline extending outside the water tank (6), the scale discharge pipe tee (4-1) is also connected to the combination control valve (3) and the scale discharge pipe (4); the combination control valve (3) includes the siphon control valve (3- 1), floating ball (3-2), transmission mechanism (3-3), floating core check valve (3-4); main structure of siphon control valve (3-1), transmission mechanism (3-3), The floating core check valve (3-4) is all located on the top wall outside of the water tank (6); the float (3-2) is installed inside the water tank (6) for detecting the height of the water level of the water tank, and the water level of the water tank is passed through the transmission mechanism (3-4). -3) Control the opening and closing of the siphon control valve (3-1) by the floating ball (3-2); the inlet of the combined control valve (3) is connected to the tee (4-1) of the discharge pipe, 3) The outlet is open to the atmosphere.

Preferably, the combination control valve (3) also includes a protective cover (3-5); the protective cover (3-5) is arranged on the top wall outside the water tank (6), and the siphon control valve (3-1), the transmission mechanism The main structure of (3-3) and the floating core check valve (3-4) are installed in the protective cover (3-5).

Preferably, the transmission mechanism (3-3) includes a bracket (3-3-1), an elastic member (3-3-2), a guide rod (3-3-3), and the guide rod (3-3-3) One end stretches into the water tank (6) through the top wall of the water tank (6) and is fixed with the floating ball (3-2), and the other end of the guide rod (3-3-3) is limited on the bracket (3-3) by setting a limiter. -3-1) on one end, the other end of the support (3-3-1) is rotated and fixed on the top wall outside of the water tank (6), and the middle part of the support (3-3-1) passes through the elastic member (3-3 -2) be fixed on the top wall outside of water tank (6).

Still preferably, the elastic member (3-3-2) is a spring.

As a further improvement of the above scheme, the lowest point of the upper opening of the heat collecting tube (7) is equal to or slightly lower than the lowest point of the inner wall of the water tank (6).

As a further improvement of the above scheme, the dirt suction pipe (1) is covered with some support rings (1-1) along the way in the heat collection pipe (7), so that the dirt suction pipe (1) does not touch the side wall of the heat collection pipe (7).

Compared with the prior art, the utility model siphon descaling type solar water heater has beneficial effects reflected in:

1. The main structure and main components are fully compatible with conventional solar water heaters, and the operation methods are basically the same;

2. The descaling operation is completely controlled by the user and can be carried out at any time;

3. Driven by gravity and hydrodynamic force, the scale in the water tank and in the heat collecting tubes will concentrate to the bottom of the heat collecting tubes, and after being concentrated, it will be sucked out by the scale removal system, which can achieve the overall descaling effect of the solar water heater, basically no need to disassemble Descaling;

4. The scale discharge system sucks out highly concentrated scale suspension, which can achieve the effect of discharging more scale with less water consumption;

5. The recoil function basically solves the problem that the dirt suction pipeline and return water pipeline are blocked by scale blocks;

6. The structure is simple, the cost is low, the adjustment is easy, and maintenance-free operation can be realized;

7. With tap water as the power source, it does not need electricity, magnetism, chemical and other energy and consumables, and has no chemical pollution, electromagnetic pollution and electricity safety issues.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing solar water heater.

Fig. 2 is a structural schematic diagram of another existing solar water heater.

Fig. 3 is a schematic structural view of the siphon descaling solar water heater provided by Embodiment 1 of the present utility model.

Fig. 4 is a partial side view of the siphon descaling solar water heater in Fig. 3 .

Fig. 5 is a sectional view along the section line I-I in Fig. 3, which is also a layout diagram of the descaling pipe in the water tank

Fig. 6 is a sectional view along the section line II-II in Fig. 3, which is also a layout diagram of the dirt suction pipe, the scale removal pipe, the dirt collection pipe, and the heat collection pipe in the water tank

Fig. 7 is a schematic structural diagram of the combined control valve in Fig. 3 .

Fig. 8 is a schematic diagram of the location of the external pipe and handle of the scaling/recoil valve in Fig. 3 .

Fig. 9 is a schematic diagram of the installation of the support ring in the heat collecting tube in Fig. 3 .

Figure 10 is a schematic structural view of the siphon descaling solar water heater provided by Embodiment 2 of the present invention.

Description of main symbols

1——Sucking tube 1-1——Support ring

2——Scale collection pipe 3——Combined control valve

3-1——Siphon control valve 3-2——Floating ball

3-3——Transmission Mechanism 3-3-1——Bracket

3-3-2——elastic part 3-3-3——guide rod

3-4——floating core check valve 3-5——protective cover

4——Scale discharge pipe 4-1——Scale discharge pipe tee

5——Scaling/recoil valve 6——Water tank

7——Heat collector tube 8——Up water pipe

8-1——Scale removal pipe 8-2——Spray hole

10——Shower/fill valve 10-1——Shower handle

10-2——Water supply handle 11——Tap water pipe

12——exhaust pipe 13——bathroom

14——Overflow container 15——Return pipe

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with implementation examples. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The main feature of the siphon descaling solar water heater of the utility model is that it adopts the inverted U-shaped tube siphon descaling method, which can automatically remove the scale in the heat collecting pipe and the water tank during normal use, and does not need to dismantle the main body of the water heater for mechanical or chemical descaling. Descale. The working principle of the utility model is to use the siphon effect of the inverted U-shaped tube to suck out the scale deposited on the bottom of the vacuum heat collecting tube and discharge it into the overflow water container in the bathing room. The physical structure of the utility model is to add scale suction pipes, scale collection pipes, scale discharge pipes, combined control valves, scale discharge/recoil valves and scale removal pipes on the basis of conventional solar water heaters; It is realized by the combination of four sub-functions of scaling, descaling, control and recoil.

The beneficial effects of the utility model siphon descaling solar water heater are mainly reflected in: 1. The main structure is fully compatible with conventional solar water heaters, and the operation method is basically the same; 2. The descaling operation is completely controlled by the user and can be carried out at any time; 3. 1. The scale discharge system sucks out highly concentrated scale suspension, which can achieve the effect of discharging more scale with less water consumption; 4. Simple structure, low cost, easy adjustment, basically no need to disassemble and descale, and can be used Realize maintenance-free operation; 5. With tap water as the power source, it does not need other energy and consumables such as electricity, magnetism, and chemistry, and has no chemical pollution, electromagnetic pollution, and electricity safety issues.

Please refer to Fig. 3 and Fig. 4 together. The siphon descaling type solar water heater provided by Embodiment 1 of the present utility model includes a water tank 6, an upper water pipe 8, several heat collecting pipes 7, a shower/water supply valve 10, a siphon descaling type descaling dirt body. The scale removal mechanism includes a number of scale suction pipes 1, scale collection pipe 2, scale discharge pipe 4, scale discharge pipe tee 4-1, combined control valve 3, scale discharge/recoil valve 5, and scale removal pipe 8-1. The top of the water tank 6 can be provided with an exhaust pipe 12 .

Please combine Figure 5 and Figure 6, dirt suction pipe 1 - the material can be a heat-resistant, anti-aging hose, one end is inserted into the heat collecting pipe 7 close to the bottom, and the other end is connected to the interface of the dirt collecting pipe 2, and along the way in the heat collecting pipe 7 Put some supporting rings 1-1 (as shown in Figure 9), so that the dirt suction pipe does not touch the wall.

Scale collection pipe 2——The material can be a stainless, heat-resistant, anti-aging hard blind pipe. When installed, it traverses the upper part of the water tank 6. One end is closed, and the other end extends out of the water tank to connect the scale discharge pipe tee 4- 1. There are several ports connected to the suction pipe 1 on the pipe.

Scale discharge pipe 4—has the three functions of "scale discharge/return water/recoil", the material can be the same as the return water pipe of conventional solar water heaters, the upper end is connected to the scale discharge pipe tee 4-1, and the lower end is connected to the bath Scale/recoil valve 5 between 13.

Scale discharge pipe tee 4-1—the three interfaces are respectively connected with the scale discharge pipe 4, the scale collection pipe 2, and the combined control valve 3.

Please combine with Fig. 7, combined control valve 3 - the main body is installed on the top of the outside of the water tank 6, mainly consists of siphon control valve 3-1, floating ball 3-2, transmission mechanism 3-3, floating core check valve 3-4, The protective cover 3-5 consists of five parts.

The installation relationship of each part of the combined control valve 3 is:

(1) The main body of the control valve is located above the outside of the water tank 6 and installed in the protective cover 3-5;

(2) The floating ball 3-2 is installed inside the water tank 6 to detect the water level of the water tank 6;

(3) The conduction mechanism 3-3 is mainly composed of a bracket 3-3-1, an elastic member 3-3-2, and a guide rod 3-3-3; through the conduction mechanism 3-3, the floating ball 3-2 can realize the siphon control valve 3 -1 open and close control;

(4) The outlet of the siphon control valve 3-1 is open to the atmosphere;

(5) The inlet of the floating core check valve 3-4 is connected to the scale discharge pipe tee 4-1.

One end of the guide rod 3-3-3 extends into the water tank 6 through the top wall of the water tank 6 and is fixed with the floating ball 3-2, and the other end of the guide rod 3-3-3 is limited to the bracket 3- On one end of 3-1, the other end of support 3-3-1 is rotated and fixed on the top wall outside of water tank 6, and the middle part of support 3-3-1 is fixed on the top wall of water tank 6 by elastic member 3-3-2 on the outside. The elastic member 3-3-2 is preferably a spring, and may also be a rubber strip or the like.

The functions realized by combined control valve 3 are:

(1) During the rising stage of the water level of the water tank 6, when the water level reaches a height slightly lower than that of the dirt collecting pipe 2, the siphon control valve 3-1 is closed to form a siphon condition;

(2) During the water level drop stage of the water tank 6, when the water level drops below the set value of the height of the dirt collection pipe 2, the siphon control valve 3-1 is opened, the air enters the dirt collection pipe 2, and the siphon condition is destroyed;

(3) By adjusting the parameters of the transmission mechanism 3-3, the opening and closing water level value of the siphon control valve 3-1 can be set;

(4) During recoil, the tap water goes up to the floating core check valve 3-4 through the scale discharge pipe tee 4-1 of the scale discharge pipe 4, the floating core in the floating core check valve 3-4 floats up, and the floating core check valve 3-4 is closed, so that the recoil water pressure can not flush open the siphon control valve 3-1 to leak.

Please refer to FIG. 8 , the scale discharge/recoil valve 5—the three-position three-way valve is installed in the bathroom 13 , its I end is connected to the scale discharge pipe 4 , its II end is connected to the atmosphere, and its III end is connected to the tap water pipe 11 . When the handle is at the "0" position (closed position), the three ports are not connected to each other; when the handle is at the "1" position of the scale discharge position, the I-II ends are connected, and the sewage in the scale discharge pipe 4 is discharged; the handle is at the "2" position In recoil position, I-III ends are connected to supply recoil water to the scale discharge pipeline.

Heat collecting tube 7——can be the same as the glass vacuum heat collecting tube of conventional solar water heaters, and its installation points are: the lowest point of the heat collecting tube 7 upper opening is equal to or slightly lower than the lowest point of the water tank 6 inner wall, and the water energy at the bottom of the water tank 6 Smoothly flow into the heat collecting tube 7 degrees.

Upper water pipe 8—material can be the same as the upper water pipe of conventional solar water heaters, and the function can also be the same; its lower end is connected with the outlet of shower/water inlet valve 10, and its upper end is connected with scale removal pipe 8-1.

The descaling pipe 8-1 is a hard Y-shaped dead pipe installed symmetrically on the middle and lower side of the water tank 6. Its water inlet is connected with the upper water pipe 8, and the other two ends are closed. A certain number of spray holes 8-2 are arranged on the lower side of the pipe wall of the descaling pipe 8-1. During running water, tap water is sprayed to the cylinder wall of water tank 6 middle and lower parts through spray hole 8-2, drives the scale on the water tank 6 side walls to water tank 6 bottoms to concentrate.

Shower/water supply valve 10—can be identical with the shower/water supply valve of conventional water heater, be a three-terminal combined valve, have shower handle 10-1 and water supply handle 10-2, be installed in the bathroom 13. The three ports are respectively connected to the running water pipe 11, the upper water pipe 8 and the shower head. Functions such as adding cold water, releasing hot water, and adjusting the temperature and volume of shower water can be realized.

The description of the operation process of the siphon descaling solar water heater is as follows.

1. Water supply——put the handle of scale discharge/recoil valve 5 at position "1" (scale discharge position), turn on the water supply handle 10-2 of the shower/water supply valve 10, and tap water enters the scale removal through the water supply pipe 8 The pipe 8-1 sprays out from the water spray hole 8-2, and the water level of the water tank 6 gradually increases; when the water level reaches a height slightly lower than the dirt collection pipe 2, the floating ball 3-2 floats up, and the siphon control valve 3-1 is closed ; When the water level continues to increase to above the height of the scale collection pipe 2, under the action of water pressure, the water at the bottom of the heat collection pipe 7 enters the scale suction pipe 1 through the lower port of the scale suction pipe 1, goes up into the scale collection pipe 2, and then passes through the scale discharge pipe 4 and the descaling/backflush valve 5 drain to the overflow water container 14 of the bathroom 13. The operator observes the outlet of the scale removal/recoil valve 5 in the bathroom 13, and after the overflow backwater occurs, the operator closes the water supply handle 10-2, and the water supply operation is terminated.

2. Scaling——After the outlet of the scaling/recoil valve 5 overflows and returns water, due to the formation of the water column in the scaling pipe 4 and the siphon control valve 3-1 being in a closed state, the scale suction pipe 1 and the scale collecting pipe 2. The scale discharge pipe 4 forms an inverted U-shaped siphon pipeline, and the negative pressure generated sucks the porridge-like scale deposited at the bottom of the heat collection pipe 7 into the scale suction pipe 1, goes up to the scale collection pipe 2, and passes through the scale discharge pipe 4 and the discharge pipe. The scale/backflush valve 5 drains to the overflow water container 14 of the bathroom 13.

3. Manual termination of descaling—the operator observes the overflow return water discharged from the descaling/recoil valve 5 to the overflow water container 14, and after the water flow becomes clear, set the handle of the descaling/recoil valve 5 to "0" position (closed position), the outlet of the return pipe is shut off, and the scaling stops.

4. Automatic termination of descaling——During the descaling process, the water level of the water tank 6 continues to drop. When the water level of the water tank drops below the set value of the height of the scale collection pipe 2, the floating ball 3-2 descends, and the siphon control valve 3-1 is opened. Atmosphere enters the dirt collecting pipe 2, the negative pressure disappears, the siphon condition is destroyed, and the scaling is automatically terminated.

5. Bathing spray——open the shower handle 10-1 of the shower/water supply valve 10, and the hot water in the water tank 6 passes through the water spray hole 8-2→scale removal pipe 8-1→water supply pipe 8→shower/water supply The valve 10 is sprayed from the shower head, and the shower handle 10-1 is operated to adjust the water temperature and water volume. During the spraying process, the water level of the water tank 6 continues to drop, and when the water level of the water tank 6 is lower than the height of the descaling pipe 8-1, the spraying is terminated.

6. Recoil and anti-blocking——put the handle of scale removal/recoil valve 5 to the "2" position (recoil position), the I-III ends of the scale discharge/recoil valve 5 are connected, and the tap water is drained through tap water pipe 11→ Scale/recoil valve→scaling discharge pipe 4→scaling collection pipe 2→scaling suction pipe 1→heat collection pipe 7, realizes backflushing and unclogging of the fouling on the return pipe and the bottom port of the suction pipe 1. Now the floating core in the floating core check valve 3-4 floats up, and the floating core check valve 3-4 is closed, so that the recoil water can not be washed away and leaked through the siphon control valve 3-1. In actual operation, the handle of the descaling/recoil valve 5 can be switched back and forth between the "1" and "2" positions, so that the descaling and recoiling can be carried out alternately.

7. Forced descaling—manually lift and fix the floating ball 3-2 of the combined control valve, so that the siphon control valve 3-1 is forced to close, and the descaling/recoil valve is placed in the "recoil" position to make the scale suction Pipe 1, scale collection pipe 2, and scale discharge pipe 4 are filled with water, and then the scale discharge/recoil valve 5 is placed in the "scale discharge" position. At this time, the siphon scale discharge starts to work and is not affected by the water level of the water tank 6. Manually stop descaling at any water level (put the descaling/recoil valve in the "closed" position), or until the siphon drains all the accumulated water in the water tank 6 and heat collecting pipe 7.

To sum up, the above-mentioned siphon descaling solar water heater uses the siphon effect of the inverted U-shaped tube to suck out the scale deposited on the bottom of the vacuum heat collecting tube 7 and discharge it to the overflow water container in the bath room. The siphon descaling type solar water heater of the utility model is composed of four sub-functions of descaling, descaling, control and recoil in a descaling manner.

1. Scale removal function - drive the scale in the water heater to the bottom of the heat collecting tube 7.

The upper end of the upper water pipe 8 is connected to the descaling pipe 8-1. When the water heater is supplemented with cold water, the tap water is sprayed to the middle and lower wall of the water tank 6 through the spray hole 8-2 of the descaling pipe to drive the scale on the wall of the water tank 6 to the water tank. 6 moves at the bottom, and finally concentrates on the bottom of the heat collecting tube 7 under the action of gravity; the lowest point of the upper opening of the heat collecting tube 7 is equal to the lowest point of the inner wall of the water tank 6, or slightly lower than the lowest point of the inner wall of the water tank 6, and the bottom of the water tank 6 The water can smoothly flow into the heat collecting tube 7 for a degree; thus, the flow direction of the scale is formed—the scale in the water tank 6 is driven by gravity and hydrodynamic force, and finally concentrates at the bottom of the heat collecting tube 7 and concentrates into a porridge-like suspension.

2. Scale removal function—Use the siphon effect of the inverted U-shaped tube to discharge the scale at the bottom of the heat collecting tube 7 to the outside of the water heater.

When the handle of the descaling/backflushing valve 5 in the bathroom is placed at the "1" position (scaling position), and the siphon control valve 3-1 in the combined control valve 3 is closed, the scale suction pipe 1, the scale collection pipe 2, The three of the scale discharge pipe 4 form an inverted U-shaped pipeline. After the inside of the inverted U-shaped pipe is filled with water, there is a water level difference (generally 3 -15 meters), a negative pressure (0.3-1.5 atmospheric pressure) is generated in the dirt collection pipe 2, forming a siphon effect, sucking the porridge-like scale deposited at the bottom of the heat collection pipe 7 into the suction pipe 1, and then ascending to the dirt collection pipe 2, It is discharged to the overflow water container 14 of the bathroom 13 through the scale discharge pipe 4 and the scale discharge/recoil valve 5 .

3. Control function - manual control or automatic control of the start and stop of the descaling function.

⑴Start the descaling——When filling the water, put the handle of the descaling/recoil valve 5 at the "1" position (the descaling position). The valve 3-1 is closed; the water level of the water tank 6 continues to rise until it reaches a height higher than the scale collection pipe 2, and then passes through the dirt suction pipe 1 → the scale collection pipe 2 → the scale discharge pipe 4 → the scale discharge/recoil valve 5 → the bathroom ( 13) The overflow water container 14 realizes backwater overflow. At this time, the scale suction pipe 1, the scale collection pipe 2, and the scale discharge pipe 4 are filled with water to form an inverted U-shaped siphon pipeline. The negative pressure sucks the porridge-like scale deposited at the bottom of the heat collection pipe into the scale suction pipe 1, and goes up to the scale collection pipe. 2. Discharge to the overflow water container 14 through the return pipe.

⑵Stop descaling——There are two control modes: manual and automatic.

A. Manually stop descaling—the operator observes the overflow water container 14 in the bathroom 13, and closes the shower/water supply valve 10 after the backwater overflow of the descaling/recoil valve 5 occurs. Due to the siphon effect, the system continues to discharge scale. After manually observing the discharge of scale, set the handle of scale discharge/recoil valve 5 to "0", the outlet of the return pipe is closed, and the scale discharge stops.

B. Automatically stop descaling - the operator closes the shower/water supply valve 10 after observing the overflow of the descaling/recoil valve 5 . Due to the siphon effect, the system continues to discharge scale, and the water level of the water tank 6 continues to decline. When the water level drops below the set value of the height of the dirt collection pipe 2, the siphon control valve 3-1 opens, the dirt collection pipe 2 is connected to the atmosphere, the negative pressure in the inverted U-shaped pipe disappears, the siphon condition is destroyed, and the scale discharge stops automatically .

(3) Forced descaling—manually lift and fix the floating ball 3-2 to force the siphon control valve 3-1 to close, set the descaling/recoil valve 5 to the "recoil" position, and inject the recoil water into the descaling pipe 4. In the scale collection pipe 2 and the scale suction pipe 1, after the inverted U-shaped pipe is filled with water, set the scale discharge/recoil valve 5 to the "scale discharge" position. At this time, the siphon scale discharge starts to work and is not affected by The control of water tank 6 water levels can manually stop descaling (the descaling/recoil valve is placed in " close " position) when any water level, or until the siphon all drains the accumulated water in the water tank 6 and the heat collecting pipe 7. This function can be used when the water heater is cleaned or repaired.

4. Recoil function—Use the pressure of tap water to recoil the scale discharge pipeline to solve the problem of scale blockage.

Generally, the scale deposited on the bottom of the heat collecting tube 7 is in the form of porridge, which is easily sucked out by the scale suction pipe 1, but the possibility of forming larger scale blocks is not ruled out. In order to prevent the port of the dirt suction pipe and the return water pipeline from being blocked by scale blocks, the utility model is provided with a recoil anti-blocking function. The specific operation is: put the handle of the scale removal/recoil valve 5 at the "2" position (recoil position), tap water through the water pipe 11 → scale discharge pipe 4 → scale collection pipe 2 → scale suction pipe 1 → heat collection pipe 7, Realize the backwashing and unclogging of the scale blocks at the return pipe and the suction pipe port.

In other embodiments, such as embodiment 2, please refer to Figure 10; the combined control valve 3 can be omitted and not provided, the dirt collection pipe 2 is fixed across the upper part of the water tank 6, and there are several dirt suction pipes connected to the dirt collection pipe 2 1, one end of the dirt collection pipe 2 is closed, the other end of the dirt collection pipe 2 protrudes from the water tank 6 and is connected to the discharge pipe 4, and the other end of the discharge pipe 4 is connected to the discharge/recoil valve 5.

One end of each dirt suction pipe 1 is inserted into one of the heat collection pipes 7 and is close to the bottom of the corresponding heat collection pipe 7 , while the other end is connected to one of the interfaces of the dirt collection pipe 2 .

The I port of the scale discharge/recoil valve 5 is connected to the scale discharge pipe 4, the II port is connected to the atmosphere, and the III port is connected to the tap water pipe 11.

Among them, when the handle of the scale discharge/recoil valve 5 is at the "0" position, it is used as the closed position, and the three ports of the scale discharge/recoil valve 5 are not connected to each other; when the handle is at the "1" position, it is used as the scale discharge position, and I— The Ⅱ ports are connected, and the sewage in the dirt collection pipe 2 is discharged; when the handle is at the "2" position, it is used as the recoil position, and the Ⅰ-Ⅲ ports are connected, and the backwash water is supplied to the scale discharge pipeline.

The inlet of the dirt suction pipe 1 is higher than the outlet of the dirt discharge/backflush valve 5 so that there is a water level difference between the outlet of the dirt discharge/backflush valve 5 .

The descaling pipe 8-1 is a Y-shaped blind pipe installed in the middle and lower side of the water tank 6 and arranged symmetrically. One end of the descaling pipe 8-1 is connected to the water inlet and the upper water pipe 8, while the other two ends are The head is closed, and a certain number of spray holes 8-2 are arranged on the pipe wall lower side of the scale removal pipe 8-1.

In order to have the function of returning water, a return pipe 15 is provided; one end of the return pipe 15 is connected to the overflow water container 14 of the bathing room 13 as the return end, and the other end extends into the water tank 6 and is at the highest point in the water tank 6, and passes through The tee is connected to the atmosphere.

Comparing Example 1 with Example 2, it can be seen that the siphon descaling type solar water heater of Embodiment 1 adopts a two-pipe scheme, that is, there are two outdoor pipelines between the bathroom 13 and the water tank 6; the siphon descaling type solar water heater of Embodiment 2 The water heater adopts a three-pipe scheme, that is, there are three outdoor pipelines between the bathroom 13 and the water tank 6 . The three-pipe scheme omits the combined control valve 3, and adds a return pipe 15. The function of the return pipe 15 is only the return water overflow, and the scale discharge pipe 4 has both scale discharge and recoil functions; in the two-pipe scheme, Scale collecting pipe 2 extends out of water tank 6 and also has a water return pipe in fact, but it shares the pipeline with scale discharge pipe 4, and scale discharge pipe 4 has three functions of "scale discharge/backwater/recoil" concurrently. In the three-pipe scheme, the dirt-collecting pipe 2 can be installed on any level in the water tank 6, rather than having to be installed at the highest overflow port in the water tank 6 like the two-pipe scheme. The structure and installation arrangement of other components are exactly the same as the three-pipe scheme and the two-pipe scheme.

The realization of the descaling function of the three-pipe scheme - use the inverted U-shaped siphon pipeline composed of the scale suction pipe 1, the scale collection pipe 2 and the scale discharge pipe 4 to discharge the scale at the bottom of the heat collecting pipe 7 to the outside of the water heater:

Scale suction pipe 1, scale collection pipe 2, and scale discharge pipe 4 form an inverted U-shaped pipeline. Under normal circumstances, this inverted U-shaped pipe is always full of water. When the handle of the descaling/recoil valve 5 in the bathroom is placed at the "1" position (scaling position), there is a water level difference between the inlet of the dirt suction pipe 1 and the outlet of the descaling/recoil valve 5 in the bathroom (generally 3-15 meters), a negative pressure (0.3-1.5 atmospheres) is generated in the dirt collection pipe 2, forming a siphon effect, sucking the porridge-like scale deposited at the bottom of the heat collection pipe 7 into the dirt suction pipe 1, and ascending to the dirt collection pipe 2 , discharge to the overflow water container 14 of the bathroom 13 through the scale discharge pipe 4 and the scale discharge/recoil valve 5. When stopping the descaling, put the handle of the descaling/recoil valve 5 at the "0" position (closed position), the outlet of the return pipe is shut off, and the descaling stops.

If there is a temporary lack of water in the inverted U-shaped pipe, you can set the scale discharge/recoil valve 5 to the "recoil" position, fill water into the inverted U-shaped pipe, and then set the scale discharge/recoil valve 5 to "" after the water is full. Descaling" bit starts descaling.

Due to the cancellation of the combined control valve 3, the inverted U-shaped siphon pipeline always exists and is not controlled by the water level of the water tank 6, and the scaling can be manually started or stopped at any water level (set the scaling/recoil valve 5 to "discharging "dirt" position or "closed" position), or until the siphon completely empties the accumulated water in the water tank 6 and the heat collecting pipe 7.

Other functions and operation methods of the three-pipe scheme are the same as those of the two-pipe scheme, and will not be repeated here.

Compared with the two-pipe scheme, the advantage of the three-pipe scheme is that the combined control valve 3 is eliminated, which reduces the cost and improves the reliability. The disadvantage is that there are three outdoor pipelines between the bathroom 13 and the water tank 6, which increases In addition, the installation difficulty and cost are lacked, and the water level protection function is lacking. If the descaling operation is wrong, the water in the water tank 6 and the heat collecting pipe 7 may be completely drained, which will cause the heat collecting pipe 7 to overheat and burst. The descaling operation of the three-pipe scheme can be carried out at any time and is fully controlled by humans; the descaling operation of the two-pipe scheme can only be carried out when the water tank 6 is at a high water level, and can be performed automatically once each time the water tank 6 is filled with water.

The above content is a detailed description of the utility model in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For those skilled in the technical field to which the utility model belongs, on the premise of not departing from the concept of the utility model, some simple replacements and changes can also be made, which should be regarded as belonging to the utility model and determined by the submitted claims protection scope of utility models.

Claims (9)

1. a kind of siphon descaling formula solar water heater, it comprises water tank (6), upper water pipe (8), water return pipe (15), some heat collecting pipes (7), shower/water feeding valve (10); heat collecting pipe (7 ) is installed at the bottom of the water tank (6) and communicates with the water tank (6); one end of the upper water pipe (8) communicates with the outlet of the shower/water supply valve (10), while the other end stretches into the water tank (6); the shower/ The water supply valve (10) is a three-terminal combination valve, and its three ports are respectively connected to the tap water pipe (11), the water supply pipe (8) and the shower head; It is characterized by: The siphon descaling type solar water heater also includes a siphon descaling type descaling mechanism, and the descaling mechanism includes several scale suction pipes (1), scale collection pipes (2), scale discharge pipes (4), scale discharge/ recoil valve (5); The dirt collection pipe (2) is fixed across the upper part of the water tank (6). The dirt collection pipe (2) is provided with several interfaces for connecting several dirt suction pipes (1). One end of the dirt collection pipe (2) is closed, and the dirt collection pipe (2) The other end of the pipe (2) protrudes from the water tank (6) and connects to the descaling pipe (4), and connects to the descaling/recoil valve (5) through the descaling pipe (4); The scale discharge/recoil valve (5) is a three-position three-way valve, its I port is connected to the scale discharge pipe (4), its II port is connected to the atmosphere, and its III port is connected to the tap water pipe (11); One end of each dirt suction pipe (1) is inserted into one of the heat collecting pipes (7) and is close to the bottom of the corresponding heat collecting pipe (7), while the other end is connected to one of the interfaces of the dirt collecting pipe (2); Among them, when the handle of the scale discharge/recoil valve (5) is at the "0" position, it is used as a closed position, and the three ports of the scale discharge/recoil valve (5) are not connected to each other; when the handle is at the "1" position, it is used as a scale discharge When the handle is at the "2" position, it is used as the recoil position, and the ports I-III are connected to supply recoil water to the scale discharge pipe (4); The inlet of the pipe (1) is higher than the outlet of the scaling/backflush valve (5) so that there is a water level difference with the outlet of the scaling/backflush valve (5). 2. The siphon descaling solar water heater according to claim 1, characterized in that: the descaling mechanism also includes a descaling pipe (8-1); the descaling pipe (8-1) is installed in the water tank ( 6) The middle and lower side of the interior is a Y-shaped blind pipe. One end of the scale removal pipe (8-1) is connected to the water inlet and the upper water pipe (8), while the other two ends are closed. The scale removal pipe (8-1) -1) A certain number of spray holes (8-2) are arranged on the lower side of the pipe wall. 3. The siphon descaling solar water heater according to claim 2, characterized in that: the descaling pipe (8-1) is a symmetrically arranged Y-shaped dead pipe. 4. The siphon descaling solar water heater according to claim 2, characterized in that: the descaling mechanism also includes a combination control valve (3), a three-way scale discharge pipe (4-1); (4-1) is connected to the pipeline where the scale collection pipe (2) extends outside the water tank (6), and the scale discharge pipe tee (4-1) is also connected to the combination control valve (3) and the scale discharge pipe (4); The combined control valve (3) includes a siphon control valve (3-1), a floating ball (3-2), a transmission mechanism (3-3), a floating core check valve (3-4); the siphon control valve (3-1 ), the main structure of the transmission mechanism (3-3), and the floating core check valve (3-4) are all located on the top wall outside of the water tank (6); the floating ball (3-2) is installed in the water tank (6), It is used to detect the water level of the water tank, and realize the control of the opening and closing of the siphon control valve (3-1) by the floating ball (3-2) through the transmission mechanism (3-3); the inlet of the combined control valve (3) is connected to the scale discharge Pipe tee (4-1), the outlet of combined control valve (3) leads to atmosphere. 5. The siphon descaling solar water heater according to claim 4, characterized in that: the combination control valve (3) also includes a protective cover (3-5); the protective cover (3-5) is arranged on the water tank (6) On the outside of the top wall, the main structure of the siphon control valve (3-1), the transmission mechanism (3-3), and the floating core check valve (3-4) are installed in the protective cover (3-5). 6. The siphon descaling solar water heater according to claim 4, characterized in that: the conduction mechanism (3-3) includes a bracket (3-3-1), an elastic member (3-3-2), a guide rod ( 3-3-3), one end of the guide rod (3-3-3) stretches into the water tank (6) through the top wall of the water tank (6) and is fixed with the float (3-2), and the guide rod (3-3 The other end of -3) is limited on one end of the support (3-3-1) by setting the limiter, and the other end of the support (3-3-1) is rotated and fixed on the top wall outside of the water tank (6), The middle part of support (3-3-1) is fixed on the top wall outside of water tank (6) by elastic member (3-3-2). 7. The siphon descaling solar water heater according to claim 6, characterized in that the elastic member (3-3-2) is a spring. 8. The siphon descaling solar water heater according to claim 1, characterized in that: the lowest point of the upper opening of the heat collecting pipe (7) is equal to or slightly lower than the lowest point of the inner wall of the water tank (6). 9. The siphon descaling solar water heater according to claim 1, characterized in that: the scale suction pipe (1) is covered with several support rings (1-1) along the way in the heat collecting pipe (7), so that the scale suction pipe ( 1) Do not touch the side wall of the heat collecting tube (7).