A hot water circulation energy-saving device with a water flow reversing three-way valve and a single-inlet and double-outlet check valve

Abstract

The present invention relates to a water flow reversing three-way valve and a single-inlet, double-outlet check hot water circulation energy-saving device. The water flow reversing three-way valve (3) comprises a three-way housing (31), a water flow direction switching rod (32), a valve core top seat (36), an upper shell (341), a lower shell (342) and a valve core base (38); the valve core top seat (36) and the upper shell (341) are fixedly arranged on the upper side wall of the three-way housing (31), and the lower shell (342) and the valve core base (38) are fixedly arranged on the lower side wall of the three-way housing (31); the water flow direction switching rod (32) is inserted and moved in the three-way housing (31); the device comprises a hot water tank (1), a water flow reversing four-way valve and a water outlet mechanism (5); the water flow reversing four-way valve comprises a three-way valve (2) and a water flow reversing three-way valve (3). Compared with the prior art, the present invention can reduce the hot water storage in the pipeline without reducing the hot water outlet flow rate.

Description

Technical Field

[0001] The invention relates to the field of water heaters, and in particular to a hot water circulation energy-saving device with a water flow reversing three-way valve and a single-inlet and double-outlet check valve. Background Art

[0002] Water heaters include three types: electric water heaters, gas water heaters, and solar water heaters. Water heaters can be divided into three types according to their heating power: storage type (also known as volumetric or thermal storage type), instant type, and rapid heating type (also known as semi-storage type).

[0003] Although ordinary instant water heaters and dual-mode water heaters are similar in size, their internal structures are very different. Instant water heaters are only smaller in size and more powerful than storage water heaters, so they are indeed faster in heating speed than storage water heaters. However, they cannot achieve instant heating in spring and autumn, and need to be preheated, which means you need to wait. Dual-mode water heaters can use instant heating mode in spring, summer and autumn, and heat up as soon as they are turned on.

[0004] In a storage water heater, hot water from the hot water tank circulates back into the bottom of the tank. To ensure sufficient water flow at each outlet, conventional water heaters require relatively large pipes, which results in a large amount of water remaining in the pipes. This increases the time required to drain the hot water pipes before each start-up, resulting in significant water and energy waste. Furthermore, after each use, a large amount of hot water remains in the pipes, wasting heat energy. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a hot water circulation energy-saving device with a water flow reversing three-way valve and a single-inlet and double-outlet check valve, which can reduce the hot water storage in the pipeline without reducing the hot water outlet flow rate.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The purpose of this invention is to replace the single-outlet coarse main pipe of the water tank with a double-outlet fine main pipe, thereby reducing the water holding capacity in the main pipe without reducing the hot water flow rate, thereby reducing the waste of water resources and heat energy. The specific solution is as follows:

[0008] A water flow reversing three-way valve, comprising a three-way housing, a water flow direction switching rod, a valve core top seat, an upper housing, a lower housing and a valve core base;

[0009] The valve core top seat and the upper shell are fixedly arranged on the upper side wall of the three-way shell, and the lower shell and the valve core base are fixedly arranged on the lower side wall of the three-way shell;

[0010] The water flow direction switching rod is movably connected between the valve core top seat, the upper shell, the lower shell and the valve core base.

[0011] Furthermore, the upper outer diameter of the water flow direction switching rod matches the inner diameter of the valve core top seat and is larger than the inner diameter of the upper shell; the lower outer diameter of the water flow direction switching rod matches the inner diameter of the valve core base and is larger than the inner diameter of the lower shell.

[0012] Furthermore, the water flow direction switching rod is provided with an upper mushroom head at the top and a lower mushroom head at the bottom;

[0013] When the device discharges water, the lower mushroom head abuts against the lower shell; when the device circulates water, the upper mushroom head abuts against the upper shell.

[0014] This means that when the device discharges water, the water flows from port a to port b, which is the same direction as the flow in the tee. Even in a system with a small pipe diameter, the water flows in parallel, so the flow rate is not inferior to that of a system with a large pipe diameter. When the device circulates water, the water flows from port b to port c, which can quickly return the water that is about to be cooled in the outdoor environment to the hot water tank. Due to the use of small diameter pipes, the external liquid holding volume will also be less, and the heat compensation in the hot water tank will also be lower than that of a system with a large pipe diameter, which is very energy-saving.

[0015] Furthermore, a spring is provided between the lower mushroom head and the valve core base. The function of the spring is to ensure that the lower mushroom head abuts against the lower housing when the water pump has not yet started, so that the device can discharge water smoothly.

[0016] Furthermore, inner sealing rings are provided between the valve core top seat and the upper shell, and between the lower shell and the valve core base.

[0017] Furthermore, an outer sealing ring is provided between the upper shell and the side wall of the tee shell, and between the lower shell and the side wall of the tee shell.

[0018] A hot water circulation energy-saving device with a single-inlet and double-outlet check valve including the water flow reversing three-way valve as described above, the device comprising a hot water tank, a water flow reversing four-way valve and at least one water outlet mechanism;

[0019] The water flow reversing four-way valve includes a directly connected three-way valve and a water flow reversing three-way valve;

[0020] The water outlet of the hot water tank is connected to a tee, and the tee and the water flow reversing three-way valve are also connected by an outlet pipe, and the water outlet mechanism is arranged on the outlet pipe;

[0021] The water flow reversing three-way valve is connected to the water inlet of the hot water tank through a circulating water pipe.

[0022] Furthermore, a water pump is provided on the circulating water pipe.

[0023] Furthermore, the water outlet mechanism is a faucet.

[0024] Furthermore, the water outlet of the three-way valve is directly connected to the water inlet of the water flow reversing three-way valve.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) In the present invention, the two three-way structures form a dual water outlet effect, and the linkage of the two check mechanisms in the water flow reversing three-way valve forms the switching of the water flow direction;

[0027] (2) In the present invention, by operating and stopping the water pump, the flow direction of the water channel is changed, which can reduce the water capacity in the pipeline and reduce the cold water discharge volume, thereby saving water resources and shortening the waiting time for emptying the cold water in the pipeline;

[0028] (3) In the present invention, since the water capacity is reduced, less heat energy is wasted in the pipeline each time the water is used up, thereby reducing heating energy consumption, electricity and gas, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An exploded view of the water flow reversing valve in the embodiment;

[0030] Figure 2 This is a cross-sectional view of the water flow reversing valve in the embodiment when discharging water;

[0031] Figure 3 Schematic diagram of water usage status of the hot water circulation energy-saving device in the embodiment;

[0032] Figure 4 A cross-sectional view of the water flow reversing valve in the embodiment during water circulation;

[0033] Figure 5 Schematic diagram of water circulation status of the hot water circulation energy-saving device in the embodiment;

[0034] Figure 6 This is a schematic diagram of a hot water circulation device in the prior art;

[0035] The numbers in the figure are as follows: hot water tank 1, tee 2, water outlet pipe 25, water flow reversing three-way valve 3, tee housing 31, water flow direction switching rod 32, upper mushroom head 321, lower mushroom head 322, outer sealing ring 33, upper shell 341, lower shell 342, inner sealing ring 35, valve core top seat 36, spring 37, valve core base 38, water pump 4, circulating water pipe 41, water outlet mechanism 5. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0037] Example

[0038] A single-inlet, double-outlet, non-return hot water circulation energy-saving device, such as Figure 1 , the device includes a hot water tank 1, a water flow reversing four-way valve and a water outlet mechanism 5;

[0039] The water flow reversing four-way valve includes a directly connected tee 2 and a water flow reversing three-way valve 3. On one hand, the water outlet of the tee 2 is directly connected to the water inlet of the water flow reversing three-way valve 3. On the other hand, the tee 2 and the water flow reversing three-way valve 3 are also connected by an outlet pipe 25. The water outlet of the hot water tank 1 is connected to the tee 2, and a water outlet mechanism 5 is installed on this outlet pipe 25. The water flow reversing three-way valve 3 is connected to the water inlet of the hot water tank 1 via a circulating water pipe 41. The circulating water pipe 41 is equipped with a water pump 4. The water outlet mechanism 5 is a faucet.

[0040] The water flow reversing three-way valve 3 includes a three-way housing 31, a water flow direction switching rod 32, a valve core top seat 36, an upper shell 341, a lower shell 342 and a valve core base 38;

[0041] The water flow direction switching lever 32 has an upper mushroom head 321 at its top and a lower mushroom head 322 at its bottom. When the device is discharging water, the lower mushroom head 322 abuts against the lower housing 342; when the device is circulating water, the upper mushroom head 321 abuts against the upper housing 341. The upper outer diameter of the water flow direction switching lever 32 matches the inner diameter of the valve core seat 36 and is larger than the inner diameter of the upper housing 341. The lower outer diameter of the water flow direction switching lever 32 matches the inner diameter of the valve core seat 38 and is larger than the inner diameter of the lower housing 342.

[0042] The valve core top seat 36 and the upper shell 341 are fixed on the upper side wall of the three-way shell 31, and the lower shell 342 and the valve core base 38 are fixed on the lower side wall of the three-way shell 31; the water flow direction switching rod 32 is movably connected between the valve core top seat 36, the upper shell 341, the lower shell 342 and the valve core base 38.

[0043] A spring 37 is provided between the lower mushroom head 322 and the valve core base 38. An inner sealing ring 35 is provided between the valve core top seat 36 and the upper housing 341, and between the lower housing 342 and the valve core base 38. An outer sealing ring 33 is provided between the upper housing 341 and the side wall of the three-way housing 31, and between the lower housing 342 and the side wall of the three-way housing 31.

[0044] Working principle: When water needs to be discharged, the water pump 4 is turned off and the faucet is opened. At this time, due to the presence of the spring 37, the lower mushroom head 322 is always in contact with the lower shell 342, and the direction of water flow from port a / b to port c is blocked. The water flow is forced to flow from port a to port b, which means that the faucet will receive two streams of water in the same direction, doubling the flow rate.

[0045] When the water flow stops, the water pump 4 is turned on and the faucet is closed. At this time, the suction force of the water pump 4 overcomes the elastic force of the spring 37, so that the water flow direction from port a to port b / c is blocked, and the water flow is forced to flow from port b to port c, quickly and specifically pumping the water back to the hot water tank 1 for heat compensation.

[0046] This means that when the device is discharging water, Figure 2-3 , water flows from port a to port b, which is the same as the flow direction in tee 2. Even in a system with a small diameter, the flow rate is not inferior to that of a system with a large diameter because the water flows in parallel. When the device is circulating water, Figure 4-5 The water flows from port b to port c, which can quickly return the water that is about to be cooled in the outdoor environment to the hot water tank 1. Due to the use of small diameter pipes, the external liquid holding volume will also be less, and the heat compensated in the hot water tank 1 will also be lower than that of the large diameter pipe system, which is very energy-saving.

[0047] In this embodiment, the inner diameter of the water outlet pipe 25 is 12 mm and the length is 50 m. It is not difficult to calculate that the water capacity in the water outlet pipe 25 is approximately 5.62 L.

[0048] Comparative Example

[0049] A hot water circulation device, such as Figure 6 , the device includes a hot water tank 1 ', and a water outlet mechanism 5';

[0050] The water outlet and the water inlet of the hot water tank 1' are connected through a water pipe, and a water outlet mechanism 5' is arranged on the water pipe; a water pump 4' is arranged on the water pipe, and the water outlet mechanism 5' is a faucet.

[0051] In this comparative example, the inner diameter of the water pipe is 16 mm and the length is 50 m. It is not difficult to calculate that the water capacity in the water pipe is approximately 10.05 L.

[0052] It is not difficult to see that in the embodiment, due to the two-way water outlet, the flow rate is doubled, and the flow rate of the water outlet mechanism 5 is increased by 11.8% compared with the water outlet mechanism 5 '. Since the liquid holding volume in the water pipe of the embodiment is small, the time for emptying the cold water is shortened by 44%. This means that compared with the prior art, the present invention changes the single water outlet coarse main pipe diameter of the water tank into a double water outlet fine main pipe diameter. Without reducing the hot water supply flow rate, the water capacity in the main pipe is reduced, thereby reducing the waste of water resources and heat energy during cold water emptying and circulation.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A single-inlet, double-outlet, non-return hot water circulation energy-saving device, characterized in that: The device comprises a hot water tank (1), a water flow reversing four-way valve, and at least one water outlet mechanism (5); The water flow reversing four-way valve comprises a directly connected three-way valve (2) and a water flow reversing three-way valve (3); The water outlet of the hot water tank (1) is connected to the tee (2), and the tee (2) and the water flow reversing three-way valve (3) are also connected by a water outlet pipe (25), and the water outlet mechanism (5) is arranged on the water outlet pipe (25); The water flow reversing three-way valve (3) is connected to the water inlet of the hot water tank (1) via a circulating water pipe (41); The circulating water pipe (41) is provided with a water pump (4); The water outlet of the three-way valve (2) is directly connected to the water inlet of the water flow reversing three-way valve (3); The water flow reversing three-way valve (3) comprises a three-way housing (31), a water flow direction switching rod (32), a valve core top seat (36), an upper housing (341), a lower housing (342) and a valve core base (38); The valve core top seat (36) and the upper shell (341) are fixedly arranged on the upper side wall of the three-way shell (31), and the lower shell (342) and the valve core base (38) are fixedly arranged on the lower side wall of the three-way shell (31); The water flow direction switching rod (32) is sequentially inserted and movably connected between the valve core top seat (36), the upper shell (341), the lower shell (342) and the valve core base (38); The outer diameter of the upper portion of the water flow direction switching rod (32) matches the inner diameter of the valve core top seat (36) and is larger than the inner diameter of the upper shell (341); the outer diameter of the lower portion of the water flow direction switching rod (32) matches the inner diameter of the valve core base (38) and is larger than the inner diameter of the lower shell (342); The water flow direction switching rod (32) is provided with an upper mushroom head (321) at the top and a lower mushroom head (322) at the bottom; When the water flow reversing three-way valve is discharging water, the lower mushroom head (322) abuts against the lower shell (342); when the water flow reversing three-way valve is circulating water, the upper mushroom head (321) abuts against the upper shell (341); A spring (37) is provided between the lower mushroom head (322) and the valve core base (38).

2. A single-inlet, double-outlet, non-return hot water circulation energy-saving device according to claim 1, characterized in that: An inner sealing ring (35) is provided between the valve core top seat (36) and the upper shell (341), and between the lower shell (342) and the valve core base (38).

3. The single-inlet, double-outlet, non-return hot water circulation energy-saving device according to claim 1, characterized in that: An outer sealing ring (33) is provided between the upper shell (341) and the side wall of the three-way shell (31), and between the lower shell (342) and the side wall of the three-way shell (31).

4. The single-inlet, double-outlet, non-return hot water circulation energy-saving device according to claim 1, characterized in that: The water outlet mechanism (5) is a faucet.

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