CN221003870U

CN221003870U - Small flow valve and water heater

Info

Publication number: CN221003870U
Application number: CN202322495356.4U
Authority: CN
Inventors: 李丕田; 李龙; 辛森森
Original assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-24
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a small-sized flow valve and a water heater, wherein the small-sized flow valve comprises: the valve body is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, a first flow passage, a second flow passage and a bypass flow passage are formed in the valve body, the first flow passage is communicated with the first water inlet and the first water outlet, the second flow passage is communicated with the second water inlet and the second water outlet, and two ends of the bypass flow passage are respectively communicated with the first flow passage and the second flow passage; and the control part is arranged on the valve body and is used for controlling the water flow of the bypass flow passage. The small flow valve of the technical scheme can be well applied to a pipeline system of the water heater, so that the water heater has a bypass water mixing function, and the problems of constant temperature difference, high vaporization noise, low thermal efficiency and the like of the traditional water heater can be effectively solved.

Description

Small flow valve and water heater

Technical Field

The utility model relates to the technical field of flow control, in particular to a small flow valve and a water heater.

Background

The traditional water heater is mostly characterized in that a bypass pipe is connected between a cold water inlet pipe and a hot water outlet pipe of the heat exchanger, cold water in the cold water inlet pipe is conveyed into the hot water outlet pipe through the bypass pipe to be mixed with hot water in the hot water outlet pipe, and therefore the bypass water mixing function is achieved. The water heater with the bypass structure, especially the water heater with the heat exchanger without coil pipe, generally has the problems of constant temperature difference between start and stop, high vaporization noise, low thermal efficiency and the like.

At present, no small flow valve is available on the market, which can be well applied to a pipeline system of a water heater, so that the water heater has a bypass water mixing function, and the problems of constant temperature difference, high vaporization noise, low thermal efficiency and the like of starting and stopping can be effectively solved.

Disclosure of utility model

The utility model mainly aims to provide a small flow valve which is well suitable for a pipeline system of a water heater, so that the water heater has a bypass water mixing function, and the problems of constant temperature difference, high vaporization noise, low thermal efficiency and the like of the traditional water heater can be effectively solved.

In order to achieve the above object, the present utility model provides a small-sized flow valve for being disposed inside a water heater, the small-sized flow valve comprising:

The valve body is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, a first flow passage, a second flow passage and a bypass flow passage are formed in the valve body, the first flow passage is communicated with the first water inlet and the first water outlet, the second flow passage is communicated with the second water inlet and the second water outlet, and two ends of the bypass flow passage are respectively communicated with the first flow passage and the second flow passage; and

And the control part is arranged on the valve body and is used for controlling the water flow of the bypass flow passage.

In one embodiment, the valve body comprises:

The first flow channel is formed in the first pipe body, and the first water inlet and the first water outlet are respectively formed at two ends of the first pipe body;

The second pipe body is internally provided with the second flow channel, two ends of the second pipe body are respectively provided with the second water inlet and the second water outlet, and the second pipe body and the first pipe body extend in parallel and are arranged at intervals; and

The bypass pipe body is internally provided with the bypass flow channel, two ends of the bypass pipe body are respectively connected with the peripheral wall of the first pipe body and the peripheral wall of the second pipe body, and the control part is arranged on the bypass pipe body; the control component comprises a solenoid valve or a proportional valve.

In one embodiment, the first pipe body and the second pipe body extend along a first direction, the bypass pipe body extends along a second direction, two ends of the bypass pipe body are respectively connected to the middle part of the first pipe body and the middle part of the second pipe body, in the first direction, concave cavities are formed on two opposite sides of the valve body corresponding to the bypass pipe body, and the control part is at least partially accommodated in one of the concave cavities; wherein the first direction intersects the second direction.

In one embodiment, the peripheral wall of the bypass pipe body is provided with a mounting seat for mounting the control component, the mounting seat is provided with a central line extending along the first direction, the distance between the central line and the axis of the first pipe body is L1, and the distance between the central line and the axis of the second pipe body is L2, wherein L1 is larger than L2;

And/or, the distance between the axis of the first pipe body and the axis of the second pipe body is L3, wherein L3 is smaller than 100mm.

In one embodiment, the bypass flow passage comprises a first bypass section and a second bypass section which are separated from each other, the peripheral wall of the bypass pipe body is provided with a first water passing port and a second water passing port, the first bypass section is communicated with the first flow passage and the first water passing port, and the second bypass section is communicated with the second water passing port and the second flow passage; the control component comprises a driving component and a sealing piece, wherein the driving component is matched with the sealing piece so as to enable the first water passing port to be communicated with or separated from the second water passing port.

In one embodiment, the peripheral wall of the bypass pipe body is provided with a mounting seat for mounting the driving assembly, the mounting seat is provided with a sink groove for accommodating the sealing element, the bottom wall of the sink groove is provided with a first water passing port and a second water passing port, the driving assembly comprises a driving element and a push rod in driving connection with the driving element, the driving element seals the top opening of the sink groove, the push rod extends towards the sealing element and is used for driving the push rod to perform telescopic movement, when the push rod is in an extending state, the push rod abuts against the sealing element to seal the first water passing port and the second water passing port, and when the push rod is in a retracting state, a water passing flow passage for communicating the first water passing port with the second water passing port is defined between the sealing element and the bypass pipe body.

In one embodiment, an extension portion is disposed on a side, away from the bypass pipe body, of the first pipe body, the extension portion is provided with an outer port opposite to and communicated with the bypass flow passage, and the valve body further comprises a plugging plug detachably connected with the extension portion, and the plugging plug is used for opening or plugging the outer port.

In one embodiment, the valve body is provided with a connecting part, and the connecting part is used for being fixedly connected with a back plate of the water heater.

In one embodiment, the valve body and the connecting part are integrally formed, and the connecting part is fixedly connected with the back plate through a connecting piece;

And/or the valve body and the connecting part are plastic parts.

In one embodiment, the small flow valve further comprises a flow sensor arranged on the valve body, and the flow sensor is used for detecting the inflow of water into the first flow channel;

And/or the small flow valve further comprises a temperature sensor arranged on the valve body, and the temperature sensor is used for detecting the water inlet temperature of the first flow passage.

The utility model also proposes a water heater comprising:

The water inlet and the water outlet of the heat exchanger are positioned on the same side of the heat exchanger; and

The first water outlet of the small flow valve is communicated with the water inlet of the heat exchanger through the cold water inlet pipe, and the second water inlet of the small flow valve is communicated with the water outlet of the heat exchanger through the hot water outlet pipe.

In one embodiment, the small flow valve is disposed inside the water heater and adjacent to the heat exchanger.

The small-sized flow valve comprises a valve body and a control part arranged on the valve body. The valve body is provided with a first flow passage communicated with the first water inlet and the first water outlet, a second flow passage communicated with the second water inlet and the second water outlet, and a bypass flow passage communicated with the first flow passage and the second flow passage; the control part is used for controlling the water flow of the bypass flow passage. When the small flow valve is applied to the water heater, the valve body is connected to the cold water inlet pipe and the hot water outlet pipe of the heat exchanger in series, the first flow passage can be used as a water inlet flow passage communicated with the cold water inlet pipe, the second flow passage can be used as a water outlet flow passage communicated with the hot water outlet pipe, and cold water in the first flow passage can be conveyed to the second flow passage through the bypass flow passage, so that the small flow valve can be well applied to a pipeline system of the water heater, and the water heater has a bypass water mixing function. The control component is used for being electrically connected with a control system of the water heater, the control system sends corresponding control instructions to the control component according to the working state of the water heater, and then the water flow of the bypass flow channel can be controlled through the control component, so that the bypass water mixing quantity of the water heater can be adjusted according to actual working conditions, and the problems of constant temperature difference, high vaporization noise, low thermal efficiency and the like of the water heater can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a small-sized flow valve according to an embodiment of the present utility model;

FIG. 2 is a front view of the compact flow valve of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the small flow valve of FIG. 1;

FIG. 4 is an exploded view of the small-sized flow valve of FIG. 1;

FIG. 5 is a schematic view of an embodiment of a water heater according to the present utility model;

Fig. 6 is a schematic diagram of an assembled structure of the small-sized flow valve and the heat exchanger in fig. 5.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The present utility model proposes a small flow valve 100.

The small flow valve 100 may be used in a water heater 1000 or other water heating system requiring bypass mixing. Hereinafter, the application of the small flow valve 100 to the water heater 1000 will be mainly described as an example. The water heater 1000 is specifically illustrated as a gas water heater 1000 having a coiled-tube-less heat exchanger 200.

As shown in fig. 5 and 6, the water heater 1000 generally includes a heat exchanger 200, a burner 300, and a fan 400. The heat exchanger 200 includes a heat exchange tube, a heat exchange plate sleeved on the periphery of the heat exchange tube, a cold water inlet pipe 210 connected with the water inlet end of the heat exchange tube, and a hot water outlet pipe 220 connected with the water outlet end of the heat exchange tube. The burner 300 is provided below the heat exchanger 200. For the strong drum type gas water heater, the fan 400 is arranged below the burner 300; for the forced draft gas water heater, the blower 400 is disposed above the heat exchanger 200. When the water heater 1000 works, the fan 400 is started, the mixed gas of fuel gas and air enters the combustor 300 for combustion, cold water in an external water supply system can enter the heat exchange tube of the heat exchanger 200 through the cold water inlet tube 210, high-temperature flue gas generated by the combustor 300 flows upwards to exchange heat with the heat exchanger 200 so as to heat water in the heat exchange tube, and the heated hot water can be output to a user end through the hot water outlet tube 220 so as to provide hot water for the user.

In a conventional water heater, a bypass pipe is connected between a cold water inlet pipe and a hot water outlet pipe of the heat exchanger to realize a bypass water mixing function, and when the water heater works, part of cold water in the cold water inlet pipe enters the hot water outlet pipe through the bypass pipe, so that the cold water and the hot water are mixed. The water heater with the bypass structure has at least the following defects:

(1) When the water heater burns normally, the flow path inside the bypass pipe is always in conducting state, so that the highest temperature inside the heat exchange pipe is higher than the set temperature of the water heater, and the set temperature is the set temperature after cold water is mixed. In order to solve the problem of water cut-off and temperature rise, a larger bypass ratio is generally needed, if the set temperature of the water heater is 65 ℃, the actual temperature in the heat exchange tube can be up to 75 ℃, so that serious gasification noise is generated, the user experience is affected, and the service life of the heat exchanger is affected.

(2) If the bypass ratio is too large, serious vaporization noise is generated and the heat efficiency of the heat exchanger is lowered, the bypass ratio cannot be set too high in general. The coil-free heat exchanger is high in water-cooling temperature reduction of the coil, and the water-stopping temperature rise is high, and the water-stopping temperature rise can be reduced only by a large bypass ratio, so that the adverse effects of high vaporization noise and low heat efficiency are further caused.

(3) Because the bypass pipe is normally open and the bypass ratio is fixed, if the bypass ratio is large, the overshoot of start-stop is easy to occur in winter, and if the bypass ratio is small, the water outlet temperature is easy to be too high or condensate water risk is easy to occur in summer.

When the water heater stops working, heat on the finned tube can be quickly transferred to water stopped flowing, so that the water temperature is increased. When the water heater is restarted, a section of high-temperature water flows out, and a user can be scalded when serious. The water-stopping temperature drop/start-stop overshoot means that when the water heater is started again after stopping working, the actions such as cleaning before and ignition are needed, and at the moment, a section of cold water flows out of the heat exchanger before being heated to the set temperature. The start-stop constant temperature process means that a part of normal temperature hot water exists in a hot water pipeline of a user, a normal water temperature is experienced by a burner after restarting, then an upper overshoot (water-stop temperature rise) and a lower overshoot (water-stop temperature drop) are experienced, and finally the normal set temperature can be reached. The bypass ratio is the ratio of bypass flow to main line flow, bypass cold water flow + main line flow = total flow.

Based on this, the present utility model proposes a small flow valve 100, which is configured to be disposed inside a water heater 1000, where the small flow valve 100 can be well applied to a pipeline system of the water heater 1000, so that the water heater 1000 has a bypass water mixing function, and can effectively solve the problems of constant temperature difference between start and stop, high vaporization noise, low thermal efficiency, etc. existing in the conventional water heater.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the small-sized flow valve 100 includes a valve body 10 and a control part 20. The valve body 10 is provided with a first water inlet 101a, a first water outlet 101b, a second water inlet 102a and a second water outlet 102b, a first flow passage 111, a second flow passage 121 and a bypass flow passage 131 are formed in the valve body 10, the first flow passage 111 is communicated with the first water inlet 101a and the first water outlet 101b, the second flow passage 121 is communicated with the second water inlet 102a and the second water outlet 102b, and two ends of the bypass flow passage 131 are respectively communicated with the first flow passage 111 and the second flow passage 121; the control part 20 is provided on the valve body 10, and the control part 20 is used for controlling the water flow rate of the bypass flow passage 131.

Specifically, the valve body 10 is constructed in a flow path structure and serves as a structural support for the installation of the control member 20, and the valve body 10 may be made of a metal member or a high-temperature-resistant plastic member. Wherein, the valve body 10 is internally provided with a first flow passage 111, a second flow passage 121 and a bypass flow passage 131, and two ends of the bypass flow passage 131 are respectively communicated with the first flow passage 111 and the second flow passage 121. When applied to a pipeline system of the water heater 1000, one of the first flow channel 111 and the second flow channel 121 can be used as a water inlet flow channel, the other one is used as a water outlet flow channel, and the bypass flow channel 131 is used for conveying water in the water inlet flow channel into the water outlet flow channel to realize bypass water mixing; the small-sized flow valve 100 can be suitably used for a pipe system of the water heater 1000, so that the water heater 1000 has a bypass water mixing function. The control member 20 is mounted on the valve body 10 at a position corresponding to the bypass flow passage 131, and the control member 20 can control the flow rate of the water flowing through the bypass flow passage 131. It should be noted that, the control unit 20 controls the water flow rate of the bypass flow channel 131, and it should be understood that the control unit 20 controls the water flow rate passing through the bypass flow channel 131 to generate a certain change, where the water flow rate change may be a change between no flow rate and a flow rate, or a change between a large flow rate and a small flow rate in the case of a flow rate. Wherein the control component 20 includes, but is not limited to, employing solenoid valves, proportional valves, and the like.

The cold water inlet pipe and the hot water outlet pipe of the traditional water heater are respectively arranged at two sides of the width direction of the water heater, the distance between the cold water inlet pipe and the hot water outlet pipe is larger, a long bypass pipe is usually required to be connected, the cold water inlet pipe and the hot water outlet pipe are not good to be connected with a small flow valve for installation in actual production, the cost is high, and the tightness is difficult to guarantee. Referring to fig. 5 and 6, in the present embodiment, the cold water inlet pipe 210 and the hot water outlet pipe 220 of the water heater 1000 with the small flow valve 100 may be located on the same side of the water heater 1000, and the distance between the two is relatively short, so that the installation of the small flow valve 100 is suitable, a longer bypass pipe can be omitted, the cost can be reduced, and the sealing performance can be ensured. The first flow channel 111 is connected in series with the flow channel in the cold water inlet pipe 210, and the second flow channel 121 is connected in series with the flow channel in the hot water outlet pipe 220, at this time, the first flow channel 111 is a water inlet flow channel, and the second flow channel 121 is a water outlet flow channel. Cold water enters the first flow channel 111 through the first water inlet 101a, is output to the heat exchange tube of the heat exchanger 200 through the first water outlet 101b, and hot water in the heat exchange tube enters the second flow channel 121 through the second water inlet 102a, and is output through the second water outlet 102 b. The control part 20 of the small-sized flow valve 100 can be electrically connected with a control system of the water heater 1000 in a wired or wireless manner, and the control system sends out corresponding control instructions to the control part 20 according to the working state of the water heater 1000, so that the water flow of the bypass flow channel 131 can be controlled through the control part 20.

The following describes in detail the specific control process of the small flow valve 100 when the water heater 1000 is in operation, in conjunction with fig. 5 and 6.

When the water heater 1000 works normally, the control part 20 controls the bypass flow passage 131 to be closed, and the highest temperature in the heat exchange tube of the heat exchanger 200 is the set temperature of the water heater 1000 at the moment, so that the risk of gasification noise can be greatly reduced, the thermal efficiency of the heat exchanger 200 can not be influenced, and the service life of the heat exchanger 200 can be prolonged.

After the water heater 1000 is shut down, the control part 20 controls the bypass flow passage 131 to be opened, and the bypass flow passage 131 can be closed within a few seconds after being started according to actual working conditions. At this time, part of cold water in the first flow channel 111 is delivered into the second flow channel 121 through the bypass flow channel 131, and the cold water is mixed with the high temperature water in the second flow channel 121, so that the water cut-off temperature rise can be effectively reduced; since part of the cold water is branched from the bypass flow passage 131, the water flow rate of the first flow passage 111 toward the first water outlet 101b is reduced, and thus the under-start overshoot can be reduced.

In addition, whether the bypass is opened in normal combustion can be judged according to the actual working condition, for example: when the temperature difference of water entering and exiting in winter is large and the water needs to be heated to the set temperature rapidly, the control part 20 controls the bypass flow channel 131 to be closed, so that the heating speed is increased, the heating to the set temperature is ensured, and the bypass time can be reduced when water is stopped and restarted, so that the undershoot is reduced; when the low-temperature bath is needed in summer, the control part 20 controls the bypass flow passage 131 to be opened, so that the lowest temperature rise of the water heater 1000 can be reduced, the water temperature is prevented from being excessively hot during bath, the water temperature in the heat exchange tube can be increased, the flue gas temperature is increased, and the risk of condensed water is avoided.

The small-sized flow valve 100 of the present utility model includes a valve body 10 and a control member 20 provided to the valve body 10. The valve body 10 is constructed with a first flow passage 111 communicating the first water inlet 101a and the first water outlet 101b, a second flow passage 121 communicating the second water inlet 102a and the second water outlet 102b, and a bypass flow passage 131 communicating the first flow passage 111 and the second flow passage 121; the control unit 20 controls the flow rate of the water flowing through the bypass flow passage 131. When the small-sized flow valve 100 is applied to the water heater 1000, the valve body 10 is connected in series to the cold water inlet pipe 210 and the hot water outlet pipe 220 of the heat exchanger 200, the first flow passage 111 can serve as a water inlet flow passage communicated with the cold water inlet pipe 210, the second flow passage 121 can serve as a water outlet flow passage communicated with the hot water outlet pipe 220, and cold water in the first flow passage 111 can be conveyed to the second flow passage 121 through the bypass flow passage 131, so that the small-sized flow valve 100 can be well applied to a pipeline system of the water heater 1000, and the water heater 1000 has a bypass water mixing function. The control component 20 is used for being electrically connected with a control system of the water heater 1000, the control system sends out corresponding control instructions to the control component 20 according to the working state of the water heater 1000, and then the water flow of the bypass flow channel 131 can be controlled through the control component 20, so that the bypass water mixing quantity of the water heater 1000 can be adjusted according to actual working conditions, and the problems of constant temperature difference, high vaporization noise, low thermal efficiency and the like existing in the traditional water heater 1000 can be effectively improved.

Referring to fig. 1 to 3, in one embodiment, the valve body 10 includes a first pipe body 11, a second pipe body 12, and a bypass pipe body 13. The first flow channel 111 is formed inside the first pipe body 11, and the first water inlet 101a and the first water outlet 101b are respectively provided at two ends of the first pipe body 11; the second flow passage 121 is formed inside the second pipe body 12, two ends of the second pipe body 12 are respectively provided with the second water inlet 102a and the second water outlet 102b, and the second pipe body 12 and the first pipe body 11 extend in parallel and are arranged at intervals; the bypass pipe body 13 is internally provided with the bypass flow passage 131, two ends of the bypass pipe body 13 are respectively connected with the peripheral wall of the first pipe body 11 and the peripheral wall of the second pipe body 12, the control component 20 is arranged in the bypass pipe body 13, and the control component comprises an electromagnetic valve or a proportional valve.

In this embodiment, the first tube 11 and the second tube 12 extend in parallel and are spaced apart, where parallel extends means that the axis of the first tube 11 is parallel or substantially parallel to the axis of the second tube 12. The bypass pipe body 13 is connected between the first pipe body 11 and the second pipe body 12, and the axis of the bypass pipe body 13 may be perpendicular to or obliquely intersected with the axis of the first pipe body 11 (or the second pipe body 12), so that the valve body 10 generally exhibits an "H" type valve or an "N" type valve structure. In this way, the valve body 10 has a regular overall structure, and is suitable for being connected with the cold water inlet pipe 210 and the hot water outlet pipe 220 of the heat exchanger 200, which is beneficial to reducing the overall volume of the water heater 1000. The control member 20 is provided on the peripheral wall of the bypass pipe body 13 so as to control the bypass flow passage 131. Wherein the control member 20 comprises a solenoid valve or a proportional valve. For example, the control part 20 can control the on-off of the bypass flow channel 131 by adopting an electromagnetic valve, so that the bypass flow channel 131 can be switched between two gears with bypass flow and without bypass flow, the adjustment is simple and convenient, and the response speed is high. For another example, the control part 20 may be a proportional valve, and the proportional valve is configured with a stepper motor to achieve continuous stepless adjustment, so that the adjustment accuracy is higher. Optionally, the control part 20 is only one of a solenoid valve or a proportional valve, so that the number of control parts 20 can be simplified on the premise of ensuring the bypass flow regulating function, so that the overall structure of the small flow valve 100 is more simplified, the volume is smaller, and the cost is reduced.

In order to reduce the difficulty in manufacturing the valve body 10, as shown in fig. 1, 3 and 4, in one embodiment, the valve body 10 includes a first valve body 10a and a second valve body 10b that are detachably connected. The first valve body 10a includes a first pipe body 11 and a bypass pipe body 13, so that the first valve body 10a integrally presents a T-shaped valve structure, one end of the bypass pipe body 13, which is far away from the first pipe body 11, is provided with a bypass port 101c, the second valve body 10b includes a second pipe body 12, a peripheral wall of the second pipe body 12 is provided with a water through port 122, and one end of the bypass pipe body 13, which is provided with the bypass port 101c, is detachably connected with a part of the second pipe body 12, which is provided with the water through port 122. In this way, when the valve body 10 is manufactured, the first valve body 10a and the second valve body 10b can be formed separately, and then the first valve body 10a and the second valve body 10b can be assembled, so that compared with the integrated valve body structure, the first valve body 10a and the second valve body 10b have simple structures, are convenient for processing and forming, can reduce the manufacturing difficulty of the small-sized flow valve 10, and are suitable for mass production and manufacture. And the first valve body 10a and the second valve body 10b are detachably connected, when the first valve body 10a and the second valve body 10b are detached, the first valve body 10a can be used as a flow regulating valve with the control part 20, and the second valve body 10b can be used as a three-way valve, so that the small flow valve 100 can be suitable for more application scenes. Alternatively, the area of the water passage 122 is larger than the area of the bypass port 101 c. When the water in the bypass flow channel 131 is prevented from being output by the bypass port 101c, the area of the water through hole 122 is too small to generate excessive resistance to the water flow, so that the water in the bypass flow channel 131 is favorably and rapidly conveyed into the second flow channel 121.

In order to facilitate the assembly of the first valve body 10a and the second valve body 10b, as shown in fig. 4, in an embodiment, the second valve body 10b further includes a plug tube 17 disposed on a peripheral wall of the second pipe body 12, the plug tube 17 is disposed around the periphery of the water through hole 122 and extends toward the first pipe body 11, and an end of the bypass pipe body 13 provided with the bypass port 101c is detachably and hermetically inserted into the plug tube 17. Specifically, during assembly, the end of the bypass pipe body 13 provided with the bypass port 101c is inserted into the insert barrel 17, and the bypass pipe body 13 and the insert barrel 17 can be in sealing fit and fixed connection in an interference fit, colloid seal, fastener locking or other manners.

In order to ensure sealing reliability between the bypass pipe body 13 and the insertion tube 17, in an embodiment, the first valve body 10a further includes a sealing ring 16 sleeved on the outer periphery of the bypass pipe body 13, a sealing groove 134 for accommodating the sealing ring 16 is provided on the outer peripheral wall of the bypass pipe body 13, and the sealing ring 16 is in sealing fit with the inner peripheral wall of the insertion tube 17. When the bypass pipe body 13 and the plug cylinder 17 are plugged in place, the sealing ring 16 is extruded and deformed to form reliable sealing connection with the inner peripheral wall of the plug cylinder 17, so that the risk of water leakage is reduced. The sealing groove 134 can limit the movement of the sealing ring 16 along the axial direction of the bypass pipe body 13, so as to prevent the sealing ring 16 from moving along the axial direction of the bypass pipe body 13 and failing to play a sealing role in the plugging process of the bypass pipe body 13.

In order to further improve the assembly reliability and the disassembly convenience between the bypass pipe body 13 and the plug cylinder 17, as shown in fig. 4, in an embodiment, a peripheral wall of the plug cylinder 17 is provided with an insertion hole 171 into which a plug pin is inserted, and an outer peripheral wall of the bypass pipe body 13 is provided with a clamping groove 135 for being in clamping fit with the plug pin, and the plug pin locks and fixes the plug cylinder 17 and the bypass pipe body 13. When assembling, after the bypass pipe body 13 and the plug cylinder 17 are plugged in place, the plug pin is inserted into the plug cylinder 17 from the plug hole 171, and the plug pin is matched with the clamping groove 135 on the bypass pipe body 13 in a clamping manner, so that the bypass pipe body 13 and the plug cylinder 17 can be locked and fixed, and the assembling reliability and the sealing reliability between the bypass pipe body 13 and the plug cylinder 17 are improved. When the first valve body 10a and the second valve body 10b need to be disassembled, the plug pin is pulled out from the jack 171, and a certain pulling force is applied, so that the bypass pipe body 13 and the plug cylinder 17 can be separated, and the convenience of disassembly and assembly can be improved. Alternatively, the plug adopts a U-shaped plug with two pins, and the peripheral wall of the plug barrel 17 is provided with insertion holes 171 for inserting the two pins of the plug, and each insertion hole 171 penetrates through opposite sides of the plug barrel 17 along the radial direction of the plug barrel 17. Other interface parts (such as the first water inlet 101a, the first water outlet 101b, the second water inlet 102a, the second water outlet 102b, and the outer port 101 d) of the valve body 10 can also be assembled with the pipeline by adopting a structure of matching a bolt and a jack, and the detailed description thereof will be omitted herein.

As shown in fig. 2, in one embodiment, the first pipe body 11 and the second pipe body 12 are both arranged to extend along a first direction, the bypass pipe body 13 is arranged to extend along a second direction, two ends of the bypass pipe body 13 are respectively connected to a middle part of the first pipe body 11 and a middle part of the second pipe body 12, and a mounting seat 14 for mounting the control component 20 is arranged on one side of the bypass pipe body 13 in the first direction; wherein the first direction intersects the second direction.

In this embodiment, referring to fig. 5 and 6, when the small-sized flow valve 100 is applied to the water heater 1000, since the cold water inlet pipe 210 and the hot water outlet pipe 220 of the water heater 1000 are generally disposed along the height direction of the water heater 1000, the first direction is the height direction of the water heater 1000, so that the first pipe 11 and the second pipe 12 are vertical pipes extending along the height direction of the water heater 1000, so that the first pipe 11 and the second pipe 12 are connected in series with the cold water inlet pipe 210 and the hot water outlet pipe 220, respectively, and the installation suitability of the small-sized flow valve 100 and the heat exchanger 200 is improved. The second direction may be a thickness direction (e.g., a front-rear direction) of the water heater 1000 or a width direction (e.g., a left-right direction) of the water heater 1000, and the first direction and the second direction may be perpendicular to each other or have a certain inclination angle. Because the bypass pipe body 13 has a shorter length, the second direction is optionally the thickness direction of the water heater 1000, which is beneficial to fully utilizing the space in the thickness direction of the water heater 1000 so as to reduce the width dimension of the water heater 1000.

The bypass pipe body 13 has both ends connected to the middle of the first pipe body 11 and the middle of the second pipe body 12, respectively, such that the valve body 10 generally exhibits an "H" type valve structure. Because both ends of the first pipe body 11 and both ends of the second pipe body 12 extend out of one end distance along the first direction compared with the bypass pipe body 13, so that in the first direction, concave cavities are formed on the two opposite sides of the valve body 10 corresponding to the bypass pipe body 13 respectively, and the control part 20 is at least partially accommodated in one of the concave cavities, so that the concave space formed by the valve body 10 can be fully utilized to accommodate the control part 20, and the whole volume of the small flow valve 100 is reduced. For example, in the present embodiment, the valve body 10 is formed with cavities corresponding to the upper and lower sides of the bypass pipe body 13, respectively, and the control member 20 may be mounted on the upper side of the bypass pipe so as to be at least partially accommodated in the cavities on the upper side. Of course, in some embodiments, the control member 20 may also be mounted to the lower side, the front side, or the rear side of the bypass pipe body 13.

As shown in fig. 2, in one embodiment, the peripheral wall of the bypass pipe body 13 is provided with a mounting seat 14 for mounting the control component 20, the mounting seat 14 has a center line extending along the first direction, a distance between the center line and the axis of the first pipe body 11 is L1, and a distance between the center line and the axis of the second pipe body 12 is L2, wherein L1 is greater than L2.

In the present embodiment, the mounting base 14 is provided on the peripheral wall of the bypass pipe body 13, so that the control member 20 can be easily mounted. Optionally, the mounting seat 14 and the bypass pipe body 13 are integrally formed, so that the assembly process can be simplified, and the structural strength can be improved. For example, as shown in fig. 4, in the present embodiment, the mounting seat 14 is generally a square boss structure protruding from the peripheral wall of the bypass pipe body 13, four corners of the mounting seat 14 may be provided with assembly holes for the fasteners to pass through, and a sink 141 for accommodating a part of the structure of the control component 20 is provided in the middle of the mounting seat 14, where an axis of the sink 141 is a center line of the mounting seat 14. The distance between the center line of the mounting seat 14 and the axis of the first pipe body 11 is smaller than the distance between the center line of the mounting seat 14 and the axis of the second pipe body 12, so that the distance between the control part 20 and the first pipe body 11 is smaller and the distance between the control part and the second pipe body 12 is longer. In practical application, the first pipe body 11 can be a cold water pipe through which cold water flows, and the second pipe body 12 can be a hot water pipe of a hot water supply channel, so that the control part 20 can be far away from the hot water pipe (namely, the second pipe body 12), damage to the control part 20 caused by heat radiated by the hot water pipe is avoided, and meanwhile, the control part 20 is arranged closer to the cold water pipe (namely, the first pipe body 11), so that heat dissipation to the control part 20 is facilitated, and the service life of the control part 20 is prolonged.

As shown in fig. 2, in one embodiment, the distance between the axis of the first pipe body 11 and the axis of the second pipe body 12 is L3, where L3 is less than 100mm. In this way, the influence of the length and the fitting deformation of the bypass pipe body 13 on the bypass ratio and the bypass response speed can be reduced. Specifically, the distance between the first pipe body 11 and the second pipe body 12 is shorter, so that the length of the bypass pipe body 13 is shortened, and the length of the bypass flow passage 131 can be shortened, so that cold water in the first flow passage 111 can be quickly conveyed into the second flow passage 121 through the shorter bypass flow passage 131 to be mixed with hot water in the second flow passage 121, and therefore a quicker bypass response speed and a more accurate bypass ratio can be ensured. And the length of the bypass pipe body 13 is shortened, so that the structural stability of the whole valve is improved, and adverse effects on the bypass ratio and the bypass response speed caused by deformation of the bypass pipe body 13 after long-time use are avoided. Wherein L3 can be designed to be 90mm, 80mm, 70mm and the like according to requirements.

To further improve the installation adaptability of the small-sized flow valve 100 and the heat exchanger 200, as shown in fig. 3, the first water inlet 101a and the second water inlet 102a are diagonally arranged, and the first water outlet 101b and the second water outlet 102b are diagonally arranged. Taking the vertical placement of the small-sized flow valve 100 as an example, the lower end of the first pipe body 11 is provided with a first water inlet 101a, the upper end of the first pipe body 11 is provided with a first water outlet 101b, the upper end of the second pipe body 12 is provided with a second water inlet 102a, and the lower end of the second pipe body 12 is provided with a second water outlet 102b. In this way, the water flow direction in the first flow channel 111 is kept consistent with the water flow direction in the cold water inlet pipe 210 of the heat exchanger 200, and the water flow direction in the second flow channel 121 is kept consistent with the water flow direction in the hot water outlet pipe 220 of the heat exchanger 200, so that the small-sized flow valve 100 can be assembled in the pipeline system of the heat exchanger 200 without changing the pipeline trend of the heat exchanger 200.

In one embodiment, the first pipe body 11 has an inner diameter larger than the bypass pipe body 13, and the bypass ratio is not smaller than 42%.

Specifically, when the small-sized flow valve 100 is applied to the water heater 1000, the first pipe body 11 is connected to the cold water inlet pipe 210 of the heat exchanger 200, and the second pipe body 12 is connected to the hot water outlet pipe 220 of the heat exchanger 200. The inner diameter size of the first pipe body 11 is larger than the inner diameter size of the bypass pipe body 13, so that most of cold water in the first pipe body 11 can be conveyed into the heat exchanger 200, and a small part of water can be distributed into the bypass pipe body 13, thereby avoiding direct vaporization caused by too little water quantity conveyed into the heat exchanger 200, influencing the efficiency of hot water preparation, and avoiding too large temperature reduction amplitude of hot water in the second pipe body 12 caused by too much water quantity conveyed into the second pipe body 12 in the bypass pipe body 13. And by designing the inner diameter of the first pipe body 11 and the inner diameter of the bypass pipe body 13 to ensure that the bypass ratio is not less than 42%, that is, that the water flowing from the first flow passage 111 to the bypass flow passage 131 is greater than or equal to 42%, a good bypass water mixing effect can be ensured. In addition, in order to avoid that the bypass water amount is too large to generate larger impact and cooling amplitude to the hot water in the second pipe body 12, the inner diameter size of the second pipe body 12 is larger than the inner diameter size of the bypass pipe body 13.

As shown in fig. 3, in one embodiment, the bypass flow passage 131 includes a first bypass section 1311 and a second bypass section 1312 that are separated from each other, a first water passing port 132 and a second water passing port 133 are provided on a peripheral wall of the bypass pipe body 13, the first bypass section 1311 communicates with the first flow passage 111 and the first water passing port 132, and the second bypass section 1312 communicates with the second water passing port 133 and the second flow passage 121; the control part 20 comprises a driving assembly 21 and a sealing member 22, wherein the driving assembly 21 is matched with the sealing member 22 so as to enable the first water passing port 132 to be communicated with or separated from the second water passing port 133.

In the present embodiment, a partition is provided in the bypass pipe body 13, the partition divides the bypass flow passage 131 into a first bypass section 1311 and a second bypass section 1312, and a first water passing port 132 and a second water passing port 133 are provided on opposite sides of the peripheral wall of the bypass pipe body 13 corresponding to the partition. When the bypass flow passage 131 needs to be closed, the driving end of the driving assembly 21 abuts against the sealing member 22, and at this time, the driving assembly 21 cooperates with the sealing member 22 to seal the first water passing port 132 and the second water passing port 133, so that the sealing performance is ensured, and water in the first flow passage 111 cannot be continuously conveyed forward into the second bypass section 1312 after entering the first bypass section 1311. When the bypass flow passage 131 needs to be opened, the driving assembly 21 may drive the sealing member 22 away from the peripheral wall of the bypass pipe body 13 so as to conduct the first water passing port 132 with the second water passing port 133, or may also drive the driving end of the driving assembly 21 away from the sealing member 22 so as to enable the sealing member 22 to generate a certain displacement or deformation under the water flow pressure so as to conduct the first water passing port 132 with the second water passing port 133, at this time, the first bypass section 1311 is communicated with the second bypass section 1312, thereby realizing the bypass water mixing function.

In one embodiment, the peripheral wall of the bypass pipe body 13 is provided with a mounting seat 14 for mounting the driving assembly 21, the mounting seat 14 is provided with a sink 141 for accommodating the sealing element 22, the bottom wall of the sink 141 is provided with the first water passing port 132 and the second water passing port 133, the driving assembly 21 comprises a driving element 211 and a push rod 212 in driving connection with the driving element 211, the driving element 211 seals the top opening of the sink 141, the push rod 212 extends towards the sealing element 22, the driving element 211 is used for driving the push rod 212 to perform telescopic movement, when the push rod 212 is in an extending state, the push rod 212 abuts against the sealing element 22 to seal the first water passing port 132 and the second water passing port 133, and when the push rod 212 is in a retracting state, a flow passage for communicating the first water passing port 132 with the second water passing port 133 is defined between the sealing element 22 and the bypass pipe body 13.

In this embodiment, the driving member 211 is fixed on the mounting seat 14 and seals the top opening of the sink 141, so that the sealing member 22 is located in the airtight cavity defined by the driving member 211 and the bypass pipe 13, and damage to the driving member 211 caused by leakage of water in the bypass pipe 13 can be avoided. When the bypass flow passage 131 needs to be closed, the push rod 212 abuts against the sealing member 22 to block the first water passing port 132 and the second water passing port 133, and at this time, the push rod 212 generates a certain pressure on the sealing member 22, so that the sealing member 22 can be prevented from being displaced under the action of water pressure to lose the sealing function. The sealing member 22 may specifically be a flexible diaphragm, when the bypass flow passage 131 needs to be opened, the push rod 212 is retracted to be separated from the sealing member 22, and the sealing member 22 moves towards a side far away from the bypass flow passage 131 or is partially deformed under the action of water flow pressure in the bypass flow passage 131, so that a water flow passage communicating the first water passing port 132 with the second water passing port 133 is formed between the sealing member 22 and the bypass pipe body 13. In this embodiment, the control unit 20 may use an electromagnetic valve, and accordingly, the driving unit 211 may be an electromagnetic coil of the electromagnetic valve, the push rod 212 is an iron core disposed in the electromagnetic coil, and when the electromagnetic coil is energized, the iron core is driven to move. Of course, in other embodiments, other mechanical structures may be used for driving the push rod 212 to perform the telescopic motion of the driving member 211.

Referring to fig. 3 and 4, in one embodiment, an outer extension 112 is disposed on a side of the first pipe body 11 away from the bypass pipe body 13, the outer extension 112 is provided with an outer port 101d opposite to and communicating with the bypass flow channel 131, and the valve body 10 further includes a plug 15 detachably connected to the outer extension 112, where the plug 15 is used for opening or sealing the outer port 101d.

In the present embodiment, the extension 112 has a hollow cylindrical structure extending from the peripheral wall of the first pipe body 11 toward a side away from the bypass pipe body 13, and the inner cavity of the extension 112 forms the outer port 101d. In manufacturing the valve body 10, a drilling tool may be inserted into the valve body 10 through the outer port 101d to facilitate the machining of the bypass flow passage 131 inside the valve body 10. When the small-sized flow valve 100 is used normally, the outer port 101d is closed by the closing plug 15, so that the water in the valve body 10 can be prevented from leaking from the outer port 101d. In addition, the outer port 101d can also be used as another pipe connecting port of the valve body 10, and when communication with other pipelines is needed, the plugging plug 15 can be taken out from the outer port 101d so as to expand the number of the pipe connecting ports of the valve body 10.

In order to ensure sealing reliability between the plug 15 and the extension 112, the outer peripheral wall of the plug 15 is optionally provided with a seal ring 16, and when the plug 15 plugs the outer port 101d, the seal ring 16 is deformed to be in sealing engagement with the inner peripheral surface of the extension 112.

In one embodiment, the valve body 10 is provided with a connection portion for connection and fixation with a back plate of the water heater 1000. Specifically, after the water heater 1000 is installed on the wall, the back plate of the water heater is close to the wall, and the valve body 10 is fixedly connected with the back plate through the connecting part, so that the installation of the small flow valve 100 is more stable and reliable, the shaking of the small flow valve 100 in the working process of the water heater 1000 is avoided, and the working reliability of the small flow valve 100 is ensured.

Further, the valve body 10 and the connecting portion are integrally formed, and the connecting portion is fixedly connected with the back plate through a connecting piece. Wherein, valve body 10 and connecting portion integrated into one piece set up for the structural strength of connecting portion is higher, and the manufacturing of being convenient for. The connecting part is connected and fixed with the backboard through connecting pieces (such as screws, bolts and the like), the assembly is simple and convenient, and the connection is stable and reliable. Optionally, the valve body 10 and the connecting portion are plastic parts, so that the valve body 10 and the connecting portion can be integrally injection molded, and the manufacturing process is simple.

On the basis of the above embodiments, in some embodiments, the small-sized flow valve 100 further includes a flow sensor provided on the valve body 10, and the flow sensor is used for detecting the inflow of water into the first flow channel 111; and/or, the small-sized flow valve 100 further includes a temperature sensor provided to the valve body 10, and the temperature sensor is used for detecting the inlet water temperature of the first flow channel 111.

In this embodiment, the valve body 10 of the small-sized flow valve 100 can be used as an installation carrier of a flow sensor and/or a temperature sensor, so that the small-sized flow valve 100 has higher integration level and more diversified functions, and no flow sensor and/or temperature sensor need to be additionally installed on the cold water inlet pipe 210 of the water heater 1000, which is beneficial to reducing the number of assembled parts, improving the assembly efficiency, reducing the cost, and reducing the risk of water leakage caused by the assembly of the parts. When the small-sized flow valve 100 is applied to the water heater 1000, the installation position of the small-sized flow valve 100 can be arranged closer to the water inlet end of the cold water inlet pipe 210 (namely, the installation position of the original flow sensor and/or temperature sensor is replaced), so that the small-sized flow valve 100 is far away from a heat radiation area formed by the burner 300, the electronic elements integrated on the small-sized flow valve 100 are prevented from being damaged due to heat radiation, and the service life of the small-sized flow valve 100 can be prolonged.

For example, the water inlet end of the first pipe body 11 (i.e., the end provided with the first water inlet 101 a) may be provided with an extension pipe body in which a rotor is provided and a hall element is provided at the peripheral wall of the extension pipe body, so that the extension pipe body, the rotor and the hall element are combined together to form a flow sensor. When water flows through, the rotor is driven to rotate, and then the rotating speed of the rotor is detected through the Hall element, so that the flowing water flow is calculated. Of course, the form of the flow sensor is not limited thereto, and other forms of flow sensor may be employed. In addition, the peripheral wall of the extension pipe body is also provided with a temperature sensor, and a probe of the temperature sensor extends into the extension pipe body to detect the temperature of water inflow. Among them, the temperature sensor includes, but is not limited to, a thermocouple temperature sensor, a thermistor temperature sensor, and the like.

Referring to fig. 5 and 6, the present utility model further provides a water heater 1000, wherein the water heater 1000 includes a heat exchanger 200 and a small flow valve 100, and a water inlet and a water outlet of the heat exchanger 200 are both located at the same side of the heat exchanger 200; the first water outlet 101b of the small-sized flow valve 100 is communicated with the water inlet of the heat exchanger 200 through a cold water inlet pipe 210, and the second water inlet (102 a) of the small-sized flow valve 100 is communicated with the water outlet of the heat exchanger 200 through a hot water outlet pipe 220. The specific structure of the small-sized flow valve 100 refers to the above embodiments, and since the water heater 1000 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. The water heater 1000 includes, but is not limited to, a strong drum type water heater 1000 with a fan 400 disposed below, or a strong pump type water heater 1000 with a fan 400 disposed above.

Specifically, the water heater 1000 includes a small flow valve 100, a heat exchanger 200, a burner 300, and a fan 400. Wherein, the burner 300 is disposed below the heat exchanger 200, and the fan 400 is disposed below the burner 300. The intelligent bypass function of accuracy can be realized through small-size flow valve 100 in order to control bypass mixed water temperature to need not to twine the coil pipe at the combustion chamber box outside of water heater 1000, so heat exchanger 200 adopts no coil pipe heat exchanger can, so be favorable to further reducing the volume of water heater 1000, need not to set up the coil pipe simultaneously and also can reduce the point of leaking, reduce water resistance pressure. The heat exchanger 200 may include a heat exchange tube, a heat exchange plate sleeved on the periphery of the heat exchange tube, a cold water inlet tube 210 connected to a water inlet end (i.e. a water inlet) of the heat exchange tube, and a hot water outlet tube 220 connected to a water outlet end (i.e. a water outlet) of the heat exchange tube, where the water inlet and the water outlet of the heat exchanger 200 are located on the same side, and correspondingly, the cold water inlet tube 210 and the hot water outlet tube 220 are also located on the same side of the heat exchanger 200. The valve body 10 of the small-sized flow valve 100 is connected in series with the cold water inlet pipe 210 and the hot water outlet pipe 220, specifically, the first pipe body 11 of the valve body 10 may be connected in series with the cold water inlet pipe 210, and the second pipe body 12 of the valve body 10 may be connected in series with the hot water outlet pipe 220. The control part 20 of the small-sized flow valve 100 may be electrically connected to a control system of the water heater 1000 in a wired or wireless manner, and the control system may issue a corresponding control command to the control part 20 according to the operation state of the water heater 1000, so that the flow rate of the water passing through the bypass flow channel 131 may be controlled by the control part 20.

The water heater 1000 of the present utility model is integrated with the small flow valve 100 in the above embodiment, and the control system of the water heater 1000 sends corresponding control instructions to the control component 20 according to the working state of the water heater 1000, so that the control component 20 can control the water flow of the bypass flow channel 131, so that the bypass water mixing amount of the water heater 1000 can be adjusted according to the actual working condition, and the problems of constant temperature difference between start and stop, high vaporization noise, low thermal efficiency, etc. existing in the conventional water heater 1000 can be effectively improved. And the cold water inlet pipe 210 and the hot water outlet pipe 220 of the water heater 1000 can be positioned on the same side of the water heater 1000, the distance between the two is relatively short, the installation of the small flow valve 100 is suitable, the water inlet function, the water outlet function and the bypass water mixing function can be realized by installing one flow passage valve, other bypass pipes are not required to be additionally installed, the cost can be reduced, and the sealing performance is ensured.

In one embodiment, the small flow valve 100 is disposed inside the water heater 1000 and adjacent to the heat exchanger 200. In this manner, the small-sized flow valve 100 is enabled to more precisely control the accuracy of the upstream and bypass water flows, thereby more precisely controlling the temperature rise.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A small-sized flow valve for being disposed inside a water heater, the small-sized flow valve comprising:

2. The small flow valve as defined in claim 1, wherein the valve body comprises:

3. The small-sized traffic valve according to claim 2, wherein the first pipe body and the second pipe body are both extended in a first direction, the bypass pipe body is extended in a second direction, both ends of the bypass pipe body are respectively connected to the middle part of the first pipe body and the middle part of the second pipe body, and in the first direction, cavities are formed on the opposite sides of the valve body corresponding to the bypass pipe body, and the control part is at least partially accommodated in one of the cavities; wherein the first direction intersects the second direction.

4. A compact flow valve according to claim 3, characterized in that the peripheral wall of the bypass pipe body is provided with a mounting seat for the control member, the mounting seat having a centre line extending in the first direction, the distance between the centre line and the axis of the first pipe body being L1, the distance between the centre line and the axis of the second pipe body being L2, wherein L1 is greater than L2;

5. The compact flow valve as recited in claim 2, characterised in that said bypass flow passage comprises a first bypass section and a second bypass section spaced apart from each other, said bypass body having a peripheral wall provided with a first water passing port and a second water passing port, said first bypass section communicating with said first flow passage and said first water passing port, said second bypass section communicating with said second water passing port and said second flow passage; the control component comprises a driving component and a sealing piece, wherein the driving component is matched with the sealing piece so as to enable the first water passing port to be communicated with or separated from the second water passing port.

6. The small-sized traffic valve according to claim 5, wherein the peripheral wall of the bypass pipe body is provided with a mounting seat for mounting the driving assembly, the mounting seat is provided with a sink for accommodating the sealing element, the bottom wall of the sink is provided with the first water passing port and the second water passing port, the driving assembly comprises a driving element and a push rod in driving connection with the driving element, the driving element seals the top opening of the sink, the push rod extends towards the sealing element and is arranged for driving the push rod to perform telescopic movement, when the push rod is in an extending state, the push rod abuts against the sealing element to seal the first water passing port and the second water passing port, and when the push rod is in a retracting state, a water passing flow passage for communicating the first water passing port with the second water passing port is defined between the sealing element and the bypass pipe body.

7. The compact flow valve as recited in claim 2, characterised in that an extension is provided on a side of said first tubular body remote from said bypass conduit, said extension being provided with an outer port opposite and communicating with said bypass conduit, said valve body further comprising a plug removably connected to said extension, said plug being adapted to open or close said outer port.

8. A compact flow valve as claimed in claim 1, wherein the valve body is provided with a connection portion for connection and securement with a back plate of a water heater.

9. The small-sized traffic valve according to claim 8, wherein the valve body is integrally formed with the connection portion, and the connection portion is fixedly connected with the back plate through a connection member;

And/or the valve body and the connecting part are plastic parts.

10. A compact flow valve as claimed in any one of claims 1 to 9, further comprising a flow sensor provided to said valve body for sensing the flow of inlet water to said first flow passage;

11. A water heater, comprising:

A small flow valve according to any one of claims 1 to 10, wherein a first water outlet of the small flow valve is in communication with a water inlet of the heat exchanger via a cold water inlet pipe, and a second water inlet of the small flow valve is in communication with a water outlet of the heat exchanger via a hot water outlet pipe.

12. The water heater as recited in claim 11 wherein said small flow valve is disposed within said water heater and adjacent said heat exchanger.