Water quantity server and gas water heater

Abstract

The utility model provides a water quantity server and a gas water heater, and belongs to the technical field of water heating equipment. The water quantity server comprises a shell, a water valve assembly, a one-way valve and at least one water flow sensor, wherein the shell comprises a water inlet channel, a water outlet channel and a water return channel which are communicated with one another; the water valve assembly is arranged in the water outlet channel and is configured to control the water outlet amount of the water outlet channel; or the water valve assembly is arranged in the water inlet channel and is configured to control the water inlet amount of the water inlet channel; the one-way valve is mounted between the water return channel and the water inlet channel and is configured to allow water flow to flow into the water inlet channel from the water return channel; and the water flow sensor is arranged in the water inlet channel.

Description

Technical Field

[0001] The utility model relates to the technical field of water heating equipment, in particular to a water volume server and a gas water heater. Background Art

[0002] Compared with ordinary gas water heaters, which need to release a large amount of cold water before hot water can be produced, zero cold water water heaters have an additional return water circulation system, which can achieve instant heating as soon as it is turned on.

[0003] There are two main types of water heater return pipes: one is to design a separate return pipe (i.e. three-pipe zero cold water), and the other is to use the water inlet pipe as the return pipe for circulating heating (i.e. two-pipe zero cold water). As a true zero cold water technology, the three-pipe zero cold water has a separate return pipe on the water heater body to achieve independent return circulation.

[0004] The three-tube zero-cold water on the market currently avoids the impact of sudden changes in water volume on the constant temperature of the water heater by adding a water volume servo separately, and better achieves zero interference in water temperature. With a water volume servo, when the water pressure decreases, the servo will quickly expand the opening from the default state to increase the water volume; conversely, when the external water pressure increases, the servo will reduce the opening from the default state, so that the water temperature of the water heater quickly reaches the water temperature setting requirements. However, the existing water volume servo currently has multiple components dispersedly set, and there is a problem of large overall space occupation. Utility Model Content

[0005] The utility model aims to provide a water volume server, which reduces the space occupied by components and saves the comprehensive cost of components.

[0006] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0007] According to one aspect of the utility model, a water volume servo is provided, comprising a shell, a water valve assembly, a one-way valve and at least one water flow sensor, the shell comprising an inlet channel, an outlet channel and a return channel which are interconnected; the water valve assembly is arranged in the outlet channel and configured to control the water output of the outlet channel; or the water valve assembly is arranged in the inlet channel and configured to control the water input of the inlet channel; the one-way valve is installed between the return channel and the inlet channel, and the one-way valve is configured to allow water to flow from the return channel to the inlet channel; the water flow sensor is arranged in the inlet channel.

[0008] According to one embodiment of the utility model, the water valve assembly includes a valve stem and a first guide cylinder, an inner wall of the water outlet of the water outlet channel is provided with an annular step, the first guide cylinder is sealingly sleeved in the water outlet channel, the valve stem is sealingly sleeved in the first guide cylinder, and the valve stem can move axially between a first position and a second position, when the valve stem is in the first position, the distance between the first end of the valve stem and the annular step is the smallest, and when the valve stem is in the second position, the distance between the first end of the valve stem and the annular step is the largest.

[0009] According to an embodiment of the utility model, a second guide cylinder is further provided in the center of the water outlet of the water outlet channel, a columnar portion is axially extended from the first end of the valve stem, and the columnar portion can be axially movably sleeved in the second guide cylinder.

[0010] According to one embodiment of the utility model, the inner wall of the first guide cylinder is provided with an internal thread, the second end of the valve stem is provided with an external thread matching the internal thread, and the valve stem is rotatably provided on the first guide cylinder through the external thread and the internal thread.

[0011] According to an embodiment of the present utility model, the water valve assembly further comprises a driving device, which is connected to the second end of the valve stem and drives the valve stem to move axially.

[0012] According to an embodiment of the present utility model, there are two water flow sensors, and the two water flow sensors are axially spaced apart from each other.

[0013] According to an embodiment of the present utility model, the water return channel is located between two water flow sensors.

[0014] According to an embodiment of the utility model, the water inlet channel is perpendicular to the water outlet channel, and the water inlet channel and the water return channel are both H-shaped.

[0015] According to an embodiment of the utility model, a temperature sensor is further included, and the temperature sensor is arranged in the water inlet channel.

[0016] The utility model also discloses a gas water heater, comprising a water heater body and the above-mentioned water volume server, the water heater body comprising a controller, a water inlet pipe, a water outlet pipe and an operation display, the water outlet of the water outlet channel is connected to the water inlet pipe, the water inlet of the return water channel is connected to the water outlet pipe, the water flow sensor and the operation display are electrically connected to the controller respectively.

[0017] An embodiment of the present invention has the following advantages or beneficial effects:

[0018] A water volume server of the utility model comprises a shell, a water valve assembly, a one-way valve and at least one water flow sensor, wherein the shell comprises an inlet channel, an outlet channel and a return channel which are interconnected; the water valve assembly is arranged in the outlet channel and configured to control the water outlet of the outlet channel; or the water valve assembly is arranged in the inlet channel and configured to control the water inlet of the inlet channel; the one-way valve is installed between the return channel and the inlet channel, and the one-way valve is configured to allow water to flow from the return channel to the inlet channel; the water flow sensor is arranged in the inlet channel. The water volume server of the utility model embodiment integrates the return structure with the inlet and outlet water structures by arranging the water valve assembly in the shell, thereby reducing the space occupied by components and saving the comprehensive cost of components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0020] Figure 1 is a perspective view of a water volume servo according to an exemplary embodiment.

[0021] Figure 2 is a cross-sectional view of a water volume servo according to an exemplary embodiment.

[0022] Figure 3 is another cross-sectional view of a water servo according to an exemplary embodiment.

[0023] Figure 4 FIG. 1 is a schematic diagram showing the connection between a water quantity servo and a gas water heater according to an exemplary embodiment.

[0024] The reference numerals are described as follows:

[0025] 1. Shell; 11. Water inlet channel; 12. Water outlet channel; 121. Annular step; 122. Second guide cylinder; 13. Return water channel; 14. Connecting seat; 2. Water valve assembly; 21. Valve stem; 211. Columnar portion; 22. First guide cylinder; 23. Driving device; 3. One-way valve; 4. Water flow sensor; 41. Water flow rotor; 5. Temperature sensor; 6. Controller; 7. Water inlet pipe; 8. Water outlet pipe; 9. Operation display. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0027] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0028] like Figure 1-4 As shown, a water volume servo according to an embodiment of the utility model comprises a housing 1 , a water valve assembly 2 , a one-way valve 3 and at least one water flow sensor 4 .

[0029] The housing 1 includes an inlet channel 11, an outlet channel 12 and a return channel 13 which are interconnected. Figure 2 As shown, the water valve assembly 2 is disposed in the water outlet channel 12 and is configured to control the water outlet amount of the water outlet channel 12 .

[0030] like Figure 1 , 3 As shown, the one-way valve 3 is installed between the return channel 13 and the inlet channel 11 . The one-way valve 3 is configured to allow water to flow from the return channel 13 to the inlet channel 11 , while the water in the inlet channel 11 cannot flow into the return channel 13 .

[0031] The water flow sensor 4 is disposed in the water inlet channel 11 to detect the water flow rate and water flow condition of the water inlet channel 11 .

[0032] The water flow sensor 4 is located in the water inlet channel 11 and is provided with a water flow rotor 41 . When water flows, the water flow rotor 41 rotates, and the water flow sensor 4 generates an electrical signal through the rotation of the water flow rotor 41 .

[0033] The water volume servo of the embodiment of the utility model realizes the integration of the water return structure and the water inlet and outlet structure by arranging the water valve assembly 2 in the housing 1, thereby reducing the space occupied by components and saving the comprehensive cost of components.

[0034] In actual use, the water inlet channel 11 is connected to the tap water pipe, the water outlet channel 12 is connected to the water inlet pipe 7 of the gas water heater, the water outlet pipe 8 is externally connected to the hot water pipe, and the water inlet of the return water channel 13 is connected to the hot water pipe through the water pipe to realize the circulation pipeline.

[0035] The circulating water pump of the gas water heater circulates and heats the water in the water inlet channel 11, the water outlet channel 12, the heat exchanger, the water outlet pipe 8 and the return water channel 13 to achieve zero cold water output.

[0036] When the water flow sensor 4 detects that the water pressure is reduced, the water valve assembly 2 is driven to increase the water flow rate of the water outlet channel 12 .

[0037] On the contrary, when the water flow sensor 4 detects an increase in water pressure, it drives the water valve assembly 2 to reduce the water flow rate of the water outlet channel 12, so that the water temperature of the water heater quickly reaches the water temperature setting requirement.

[0038] Of course, the water valve assembly 2 is not limited to being installed in the water outlet channel 12. For example, the water valve assembly 2 can also be set in the water inlet channel 11 and configured to control the water inlet amount of the water inlet channel 11. Technicians in this field can select the installation position of the water valve assembly 2 according to actual needs.

[0039] like Figure 2 As shown, in a preferred embodiment of the present utility model, the water valve assembly 2 includes a valve stem 21 and a first guide cylinder 22 .

[0040] An annular step 121 is provided on the inner wall of the water outlet of the water outlet channel 12 , and the first guide cylinder 22 is sealedly sleeved in the water outlet channel 12 .

[0041] The valve stem 21 is sealed and sleeved in the first guide cylinder 22, and the valve stem 21 can move axially between a first position and a second position. When the valve stem 21 is in the first position, the distance between the first end of the valve stem 21 and the annular step 121 is the smallest, and the water flow passing through is also the smallest.

[0042] When the valve stem 21 is in the second position, the distance between the first end of the valve stem 21 and the annular step 121 is the largest, and the water flow rate passing therethrough is also the largest.

[0043] That is, the more the valve stem 21 moves toward the first position, the smaller the water flow; the more the valve stem 21 moves toward the second position, the larger the water flow, thereby achieving the goal of regulating the water flow.

[0044] When the water flow sensor 4 detects that the water pressure is reduced, the valve stem 21 is driven to move toward the second position to increase the water flow rate of the water outlet channel 12 .

[0045] On the contrary, when the water flow sensor 4 detects that the water pressure increases, the valve stem 21 is driven to move toward the first position to reduce the water flow rate of the water outlet channel 12 .

[0046] A second annular step is also provided in the water outlet channel 12 , and when one end surface of the first guide cylinder 22 abuts against the second annular step, the first guide cylinder 22 is installed in place.

[0047] In a preferred embodiment of the present invention, an annular protrusion is provided at the first end of the valve stem 21, and the diameter of the annular protrusion is equal to the caliber of the annular step 121. When the distance between the annular protrusion and the annular step 121 is closer, the water flow rate is smaller, and vice versa.

[0048] In a preferred embodiment of the utility model, the water valve assembly 2 also includes a sealing ring, an annular groove is formed on the outer ring surface of the first guide cylinder 22, the inner wall of the sealing ring is sealingly abutted against the groove wall of the annular groove, and the outer wall of the sealing ring is sealingly abutted against the inner wall of the water outlet channel 12.

[0049] like Figure 2 As shown, in a preferred embodiment of the utility model, a second guide cylinder 122 is further provided in the center of the water outlet of the water outlet channel 12, and a columnar portion 211 is axially extended from the first end of the valve stem 21. The columnar portion 211 can be axially movably sleeved in the second guide cylinder 122, so as to straighten the first end and the second end of the valve stem 21 and improve the operating stability of the water volume servo.

[0050] In a preferred embodiment of the present invention, a plurality of support arms are fixedly connected to the outer wall of the second guide cylinder 122 at annular intervals, and the support arms are fixedly connected to the inner wall of the water outlet channel 12 .

[0051] like Figure 2 As shown, in a preferred embodiment of the utility model, the inner wall of the first guide cylinder 22 is provided with an internal thread, the second end of the valve stem 21 is provided with an external thread matching the internal thread, and the valve stem 21 is rotatably provided on the first guide cylinder 22 through the external thread and the internal thread.

[0052] When the water flow sensor 4 detects that the water pressure is reduced, the valve stem 21 is rotated to move the valve stem 21 toward the second position to increase the water flow rate of the water outlet channel 12 .

[0053] On the contrary, when the water flow sensor 4 detects that the water pressure increases, the valve stem 21 is rotated in the opposite direction to move the valve stem 21 toward the first position to reduce the water flow rate of the water outlet channel 12 .

[0054] like Figure 1-3 As shown, in a preferred embodiment of the utility model, the water valve assembly 2 also includes a driving device 23, which is connected to the second end of the valve stem 21 and drives the valve stem 21 to move axially. The driving device 23 is a reduction motor, and the rotating shaft of the reduction motor is fixedly connected to the second end of the valve stem 21. The rotating shaft of the reduction motor rotates with the valve stem 21 to drive the valve stem 21 to move axially.

[0055] Of course, the driving device 23 is not limited to being a reduction motor. For example, the driving device 23 can also be an electric telescopic device. The telescopic rod of the electric telescopic device is fixedly connected to the second end of the valve stem 21 to drive the valve stem 21 to move axially. Technical personnel in this field can select the driving mode of the driving device 23 according to actual needs.

[0056] like Figure 1-3 As shown, in a preferred embodiment of the present utility model, there are two water flow sensors 4, and the two water flow sensors 4 are axially spaced apart.

[0057] The two water flow sensors 4 realize dual water flow sensing. By setting the water volume servo of the dual water flow sensing device to detect the water inlet signal, the water heater switch water can be quickly and accurately identified to better achieve a constant temperature effect.

[0058] Dual water flow sensors can combine to measure the tap water flow and circulating water flow to avoid misjudgment of the water heater main program and cause adverse malfunctions.

[0059] like Figure 1 , 3 As shown, in a preferred embodiment of the present utility model, the return water channel 13 is located between the two water flow sensors 4 .

[0060] like Figure 1 As shown, in a preferred embodiment of the present utility model, the water inlet channel 11 is perpendicular to the water outlet channel 12, and the water inlet channel 11 and the water return channel 13 are both H-shaped.

[0061] like Figure 1 , 2 As shown, in a preferred embodiment of the utility model, a temperature sensor 5 is also included. The temperature sensor 5 is arranged in the water inlet channel 11 and is located between the two water flow sensors 4. The return water channel 13 is located between the two water flow sensors 4 to detect the temperature of the return water entering the water inlet channel 11.

[0062] like Figure 4 As shown, the utility model also provides a gas water heater, comprising a water heater body and the above-mentioned water volume server.

[0063] The water heater body includes a water pump, a heat exchanger, a heating device, a controller 6, a water inlet pipe 7, a water outlet pipe 8 and an operation display 9.

[0064] The water outlet of the water outlet channel 12 is connected to the water inlet pipe 7, and the water outlet pipe 8 is externally connected to the hot water pipe. One or more water use points are arranged on the hot water pipe. The water use points have a water valve, and the water valve connects the hot water pipe and the tap water pipe. The water inlet of the return water channel 13 is connected to the hot water pipe through the water pipe. The water flow sensor 4 and the operation display 9 are electrically connected to the controller 6 respectively.

[0065] The heat exchanger is arranged above the heating device, and the water inlet pipe 7 and the water outlet pipe 8 are connected to the water inlet and the water outlet of the heat exchanger respectively.

[0066] The heating device, the driving device 23, the water flow sensor 4, the temperature sensor 5, the water pump and the operation display 9 are electrically connected to the controller 6 respectively.

[0067] The operation display 9 is provided with a zero cold water button and a waterfall bath button.

[0068] When the preheating function is started by operating the zero cold water function key on the operating display 9, the circulating water flow of the water heater is greater than the programmed startup water flow, and the controller 6 maintains the operation of the water pump to preheat the water in the pipeline; when the measured tap water flow is greater than the startup water flow, the controller 6 outputs a pump-off instruction to the water pump, thereby realizing the action of quickly shutting down the water pump by turning on the hot water during the preheating process.

[0069] After the boost function is turned on by operating the waterfall bath function key on the display 9, the tap water flow rate calculated by the dual water flow sensing device combination is greater than the program startup water flow rate, and the water pump is started for boosting. In the boost operation state, when the tap water flow rate calculated by the dual water flow sensing device combination is less than the shutdown water flow rate, the controller 6 outputs a pump shutdown instruction to the water pump, and then realizes the action of quickly shutting down the water pump by turning off the hot water during the boost process.

[0070] In the embodiments of the present invention, the term "multiple" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0071] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0072] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water volume server, characterized in that: include: A housing (1), the housing (1) comprising a water inlet channel (11), a water outlet channel (12) and a water return channel (13) which are interconnected; a water valve assembly (2) disposed in the water outlet channel (12) and configured to control the water outlet amount of the water outlet channel (12); or the water valve assembly (2) disposed in the water inlet channel (11) and configured to control the water inlet amount of the water inlet channel (11); a one-way valve (3), installed between the return channel (13) and the water inlet channel (11), the one-way valve (3) being configured to allow water to flow from the return channel (13) into the water inlet channel (11); At least one water flow sensor (4) is arranged in the water inlet channel (11).

2. The water volume servo according to claim 1, characterized in that: The water valve assembly (2) comprises a valve stem (21) and a first guide cylinder (22); an inner wall of a water outlet of the water outlet channel (12) is provided with an annular step (121); the first guide cylinder (22) is sealingly sleeved in the water outlet channel (12); the valve stem (21) is sealingly sleeved in the first guide cylinder (22); and the valve stem (21) can axially move between a first position and a second position; when the valve stem (21) is in the first position, the distance between the first end of the valve stem (21) and the annular step (121) is the smallest; when the valve stem (21) is in the second position, the distance between the first end of the valve stem (21) and the annular step (121) is the largest.

3. The water volume servo according to claim 2, characterized in that: A second guide cylinder (122) is also provided at the center of the water outlet of the water outlet channel (12), and a columnar portion (211) is axially extended from the first end of the valve stem (21), and the columnar portion (211) can be axially movably sleeved in the second guide cylinder (122).

4. The water volume servo according to claim 2, characterized in that: The inner wall of the first guide cylinder (22) is provided with an internal thread, and the second end of the valve stem (21) is provided with an external thread matching the internal thread. The valve stem (21) is rotatably arranged on the first guide cylinder (22) through the external thread and the internal thread.

5. The water volume servo according to claim 2, characterized in that: The water valve assembly (2) further comprises a driving device (23), wherein the driving device (23) is connected to the second end of the valve stem (21) and drives the valve stem (21) to move axially.

6. The water volume servo according to claim 1, characterized in that: There are two water flow sensors (4), and the two water flow sensors (4) are arranged axially at intervals.

7. The water volume servo according to claim 6, characterized in that: The water return channel (13) is located between the two water flow sensors (4).

8. The water volume servo according to claim 1, characterized in that: The water inlet channel (11) is perpendicular to the water outlet channel (12), and the water inlet channel (11) and the water return channel (13) are both H-shaped.

9. The water volume servo according to claim 1, characterized in that: It also comprises a temperature sensor (5), wherein the temperature sensor (5) is arranged in the water inlet channel (11).

10. A gas water heater, characterized in that: It comprises a water heater body and a water volume server as described in any one of claims 1 to 9, wherein the water heater body comprises a controller (6), a water inlet pipe (7), a water outlet pipe (8) and an operation display (9), the water outlet of the water outlet channel (12) is connected to the water inlet pipe (7), the water inlet of the return water channel (13) is connected to the water outlet pipe (8), and the water flow sensor (4) and the operation display (9) are respectively electrically connected to the controller (6).

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