Waterway proportional valve and water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a waterway proportional valve and a water heater. The waterway proportional valve comprises a valve body, an inner pipeline, a first control valve and a second control valve, the valve body comprises a valve cavity, a water inlet channel, a water outlet channel and a bypass channel, the valve cavity comprises a first cavity body and a third cavity body, the water inlet channel is communicated with the inlet end of the first cavity body, the outlet end of the first cavity body is communicated with the water outlet channel, and the third cavity body is communicated with the bypass channel; the inner pipeline is arranged on the valve body; the inner pipeline is provided with a second cavity, a water inlet, a first water outlet and a second water outlet, and the second cavity is communicated with the first cavity through the water inlet; the second cavity is communicated with the third cavity through the first water outlet and the second water outlet; the first control valve is arranged on the valve body and used for controlling opening and closing of the water inlet. The second control valve is arranged on the valve body and used for controlling opening and closing of the first water outlet. Different bypass water proportions can be selected, and the bypass water proportion at the outlet end of the water heater can be stable.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a water path proportional valve and a water heater. Background Art

[0002] In the prior art, water heaters can be divided into models without a bypass pipe and models with a bypass pipe. The models with a bypass pipe mix cold water at the hot water outlet end through the bypass pipe to ensure the constant temperature of the hot water outlet, and can effectively avoid the situation that the water outlet temperature is too high due to the secondary start and stop of the water heater. However, by using the method of rigidly adding cold water mixing at the hot water outlet end, when the water use environment (such as water temperature and water pressure) fluctuates, it will affect the constant temperature effect of the water outlet to a certain extent. Summary of the Utility Model

[0003] One of the technical problems to be solved by the utility model is to provide a water path proportional valve, which can select different bypass ratios to improve the constant temperature effect of the water outlet of the water heater.

[0004] Another technical problem to be solved by the utility model is to provide a water heater, which can select different bypass ratios to improve the constant temperature effect of the water outlet of the water heater.

[0005] The above first technical problem is solved by the following technical solutions:

[0006] The water path proportional valve includes:

[0007] A valve body, which includes a valve cavity, a water inlet channel, a water outlet channel and a bypass channel. The valve cavity includes a first cavity and a third cavity. The water inlet channel is communicated with the inlet end of the first cavity. The outlet end of the first cavity is communicated with the water outlet channel. The third cavity is communicated with the bypass channel;

[0008] An inner pipe, which is arranged in the valve body; the inner pipe is provided with a second cavity, and a water inlet, a first water outlet and a second water outlet communicated with the second cavity. The second cavity is communicated with the first cavity through the water inlet; the second cavity is communicated with the third cavity through the first water outlet and the second water outlet;

[0009] A first control valve, which is arranged on the valve body and used to control the opening and closing of the water inlet;

[0010] A second control valve, which is arranged on the valve body and used to control the opening and closing of the first water outlet.

[0011] Compared with the background art, the water path proportional valve of the utility model has the following beneficial effects:

[0012] When the waterway proportional valve is applied to a water heater, the bypass channel is connected to the bypass pipe, and the water inlet channel is connected to the water inlet pipe. Among them, the on-off of the bypass pipe can be controlled by the first control valve, and the second water outlet is in an open state all the time. When the bypass pipe is opened, the opening and closing of the first water outlet can be controlled by the second control valve, so as to realize the adjustment of various bypass ratios to adapt to different water use environments, with a fast response speed, thereby improving the constant temperature effect of the water outlet of the water heater.

[0013] In one embodiment, an inner partition is further provided in the valve cavity. The inner pipe is arranged in the valve cavity, penetrates through the inner partition and is fixedly connected to the inner partition. An outer cavity is formed between the outer side wall of the inner pipe and the inner side wall of the valve cavity. The inner partition divides the outer cavity into the first cavity and the third cavity.

[0014] In one embodiment, the inner pipe includes a water inlet pipe and a water outlet pipe. The water inlet pipe is located in the first cavity, and the water inlet is arranged on the water inlet pipe; the water outlet pipe is located in the third cavity, and the first water outlet and the second water outlet are arranged on the water outlet pipe.

[0015] In one embodiment, a communication groove is provided in the valve body. The water inlet channel is communicated with the first cavity through the communication groove, and the communication groove faces the water inlet pipe.

[0016] In one embodiment, the valve body protrudes with a first mounting portion. The first mounting portion is provided with a first mounting groove. The first mounting groove is communicated with the first cavity. The first mounting groove is coaxially arranged with the water inlet pipe, and the first control valve is installed in the first mounting groove.

[0017] In one embodiment, the valve body protrudes with a second mounting portion. The second mounting portion is provided with a second mounting groove. The second mounting groove is communicated with the third cavity. The second mounting groove is coaxially arranged with the water outlet pipe, and the second control valve is installed in the second mounting groove.

[0018] In one embodiment, the first control valve and the second control valve are installed at a preset angle.

[0019] In one embodiment, the opening area of the first water outlet is larger than that of the second water outlet.

[0020] In one embodiment, both the first control valve and the second control valve adopt pilot-operated solenoid valves.

[0021] The above second technical problem is solved by the following technical solution:

[0022] A water heater, including the above waterway proportional valve.

[0023] Compared with the background art, the water heater of the present utility model has the following beneficial effects:

[0024] The water heater includes the above-mentioned waterway proportional valve. In the waterway proportional valve, the bypass channel is connected to the bypass pipe, and the water inlet channel is connected to the water inlet pipe. Among them, the on-off of the bypass pipe can be controlled by the first control valve, and the second water outlet is in an always-open state. When the bypass pipe is opened, the opening and closing of the first water outlet can be controlled by the second control valve, so as to realize the adjustment of various bypass ratios to adapt to different water use environments, with a fast response speed, thereby improving the constant temperature effect of the water outlet of the water heater. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of the waterway proportional valve provided in the first embodiment of the present utility model;

[0026] Figure 2 It is an exploded structural diagram of the waterway proportional valve provided in the first embodiment of the present utility model;

[0027] Figure 3 It is an internal structural diagram of the waterway proportional valve provided in the first embodiment of the present utility model;

[0028] Figure 4 It is a schematic diagram of one perspective of the valve body of the waterway proportional valve provided in the first embodiment of the present utility model;

[0029] Figure 5 It is a schematic diagram of another perspective of the valve body of the waterway proportional valve provided in the first embodiment of the present utility model;

[0030] Figure 6 It is a cross-sectional view of the waterway proportional valve provided in the first embodiment of the present utility model along the plane determined by the axis of the water inlet channel and the axis of the bypass channel;

[0031] Figure 7 It is a cross-sectional view of a certain section of the waterway proportional valve provided in the first embodiment of the present utility model along the plane determined by the axis parallel to the axis of the first control valve installation position and the axis of the second control valve installation position;

[0032] Figure 8 It is a cross-sectional view of the waterway proportional valve provided in the first embodiment of the present utility model along the plane determined by the axis of the first control valve installation position and the axis of the second control valve installation position;

[0033] Figure 9 is Figure 8 a schematic diagram of the fluid flow path when the waterway proportional valve is in the second working state from a

[0034] Figure 10 is Figure 8Schematic diagram of the fluid flow path when the waterway proportional valve is in the third working state from a perspective.

[0035] Label description:

[0036] 1. Valve body; 11. Valve cavity; 111. First cavity; 112. Second cavity; 113. Third cavity; 114. Inner pipeline; 1141. Second water outlet; 1142. Water inlet; 1143. First water outlet; 1144. Water inlet pipeline; 1145. Water outlet pipeline; 115. Inner partition; 12. Water inlet channel; 121. Connecting groove; 13. Water outlet channel; 131. Second connecting hole; 14. Bypass channel; 141. Third connecting hole; 15. First mounting part; 151. First mounting groove; 16. Second mounting part; 161. Second mounting groove;

[0037] 2. First control valve;

[0038] 3. Second control valve;

[0039] 4. Water flow component; 41. Hall element;

[0040] 5. Fixed retaining ring;

[0041] 7. Check valve. Detailed implementation manner

[0042] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0044] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0045] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] Embodiment 1

[0047] This embodiment provides a waterway proportional valve, which is applied to a water heater, enabling the water heater to have a secondary mixing function, reducing the temperature rise when the water heater is turned on for the second time, and improving the comfort of user use. The waterway proportional valve has a fast response speed, can quickly adjust the bypass water ratio, and can reduce the impact on the outlet water temperature of the water heater when adjusting the bypass water ratio. Even if the water pressure entering the waterway proportional valve changes, its bypass water ratio remains a fixed value. At the same time, users can select a larger or smaller bypass water ratio according to actual needs.

[0048] Optionally, the water heater is a gas water heater. That is, the waterway proportional valve is applied to a gas water heater.

[0049] Specifically, referring to Figures 1-5 , in this embodiment, the waterway proportional valve includes a valve body 1, an inner pipe 114, a first control valve 2, and a second control valve 3.

[0050] Referring to Figure 3 , the valve body 1 includes a valve cavity 11, a water inlet channel 12, a water outlet channel 13, and a bypass channel 14. The valve cavity 11 includes a first cavity 111 and a third cavity 113. The water inlet channel 12 is communicated with the inlet end of the first cavity 111. The outlet end of the first cavity 111 is communicated with the water outlet channel 13. The third cavity 113 is communicated with the bypass channel 14.

[0051] Referring to Figure 3 , Figures 6-9 , the inner pipe 114 is arranged in the valve body 1; the inner pipe 114 is provided with a second cavity 112, as well as a water inlet 1142, a first water outlet 1143, and a second water outlet 1141 communicated with the second cavity 112. The second cavity 112 is communicated with the first cavity 111 through the water inlet 1142; the second cavity 112 is communicated with the third cavity 113 through the first water outlet 1143 and the second water outlet 1141.

[0052] The first control valve 2 is arranged on the valve body 1 and is used to control the opening and closing of the water inlet 1142.

[0053] The second control valve 3 is arranged on the valve body 1 and is used to control the opening and closing of the first water outlet 1143.

[0054] When the waterway proportional valve provided in this embodiment is applied to a water heater, cold water is delivered to the heat exchanger of the water heater through the water inlet channel 12, the first cavity 111, and the water outlet channel 13, and bypass water is introduced into the water outlet pipe of the water heater through the bypass channel 14. When the outlet water temperature of the water heater is relatively high, the bypass water delivered by the bypass channel 14 can reduce the outlet water temperature of the water heater.

[0055] This waterway proportional valve has three working modes. Users can choose whether to flow out bypass water according to actual needs; when bypass water is needed, users can choose two different bypass water ratios, and can ensure that each bypass water ratio always remains constant, ensuring the constant temperature effect of the outlet water of the water heater.

[0056] When no bypass water flow is required, the waterway proportional valve is controlled to be in the first working state. Specifically: the first control valve 2 is used to control the water inlet 1142 to be closed, and the second control valve 3 is used to control the first water outlet 1143 to be closed. At this time, the external water flow enters the first cavity 111 from the water inlet channel 12 and then flows out through the water outlet channel 13. Since the water inlet 1142 is closed at this time, the first cavity 111 and the second cavity 112 are cut off; and since the first cavity 111 and the second cavity 112 are cut off and closed at this time, the first cavity 111 and the third cavity 113 are cut off, so the water flow will not enter the second cavity 112 and the third cavity 113 at all, and the water output of the bypass channel 14 is zero.

[0057] When the user wants to select a relatively small bypass water ratio, the waterway proportional valve is controlled to be in the second working state. Specifically: the first control valve 2 is used to control the water inlet 1142 to be opened, and the second control valve 3 is used to control the first water outlet 1143 to be closed. At this time, the external water flow enters the first cavity 111 from the water inlet channel 12, and a part of the water flow in the first cavity 111 flows out through the water outlet channel 13; another part of the water flow enters the second cavity 112 from the water inlet 1142, and then the water flow in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the water in the third cavity 113 flows out through the bypass channel 14.

[0058] That is to say, in the second working state, while the water flow maintains the path of the first working state, another part of the water flow in the first cavity 111 enters the second cavity 112 from the water inlet 1142, and then the water flow in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the water in the third cavity 113 flows out through the bypass channel 14.

[0059] When the user wants to select a relatively large bypass water ratio, the water path proportional valve is controlled to be in the third working state. Specifically: the first control valve 2 is made to control the opening of the water inlet 1142, and the second control valve 3 is made to control the opening of the first water outlet 1143. At this time, the external water flow enters the first cavity 111 from the water inlet passage 12, and a part of the water flow in the first cavity 111 flows out through the water outlet passage 13; another part of the water flow enters the second cavity 112 from the water inlet 1142; a part of the water in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and another part of the water flows from the first water outlet 1143 to the third cavity 113, and the water flowing into the third cavity 113 then flows out through the bypass passage 14. Since in the third working state, the water in the second cavity 112 can flow into the third cavity 113 from both the second water outlet 1141 and the first water outlet 1143 at the same time, the water flow rate flowing into the bypass passage 14 is increased, so that the ratio of the bypass water becomes larger.

[0060] That is to say, in the third working state, while the water flow maintains the path of the second working state, another part of the water in the second cavity 112 flows from the first water outlet 1143 to the third cavity 113, thereby increasing the bypass water ratio.

[0061] Specifically, when designing the water path proportional valve, the flow area of the second water outlet 1141 is designed, and the flow area of the first water outlet 1143 is designed. The control of the bypass water ratio in the second and third working states is achieved.

[0062] It can be understood that when designing the water path proportional valve, after the flow area of the second water outlet 1141 is designed, in the second working state, the bypass water ratio is a fixed value, so as to ensure that the bypass water ratio is always stable and ensure the constant temperature effect of the water outlet of the water heater. After the flow areas of the second water outlet 1141 and the first water outlet 1143 are designed, in the third working state, the bypass water ratio is a fixed value, so as to ensure that the bypass water ratio is always stable and ensure the constant temperature effect of the water outlet of the water heater.

[0063] Optionally, in this embodiment, in the second working state, the bypass water ratio is 20%. In the third working state, the bypass water ratio is 30%. Of course, in other embodiments, in the second working state, the bypass water ratio can also be set to other values; of course, in other embodiments, in the third working state, the bypass water ratio can also be set to other values.

[0064] In one embodiment, both the first control valve 2 and the second control valve 3 are pilot-operated solenoid valves. With this arrangement, it is possible to ensure that the water path proportional valve has a relatively fast response. If the response of the water path proportional valve is slow, during the response time of the water path proportional valve, it cannot introduce bypass water into the outlet pipe of the water heater, which will cause the outlet water temperature of the water heater to remain relatively high in a short period of time during secondary start and stop, affecting the user experience.

[0065] The action time of the pilot-operated solenoid valve is short, and it can switch to the corresponding bypass water ratio within a time less than 0.1 s after receiving the action signal, thereby achieving a fast response of the water path proportional valve.

[0066] Specifically, the pilot-operated solenoid valve mainly includes an electromagnetic component and a valve body part. The electromagnetic component includes a fixed iron core, a moving iron core, and a coil, and the valve body part is connected to the moving iron core. When the coil is energized or de-energized, the moving iron core moves under the action of electromagnetic force to control the opening or closing of the valve body. The solenoid valve has advantages such as high reliability, fast response, convenient operation, energy conservation and environmental protection, and long service life.

[0067] In one embodiment, referring to Figure 1 and Figure 2 , a water flow component 4 is arranged in the water inlet passage 12, and the water flow component 4 is used to monitor the magnitude of the fluid flow rate flowing through the water inlet passage 12.

[0068] Specifically, the water flow component 4 includes a valve body main body and a Hall element 41 arranged on the valve body main body. The monitoring principle of the water flow component 4 for the fluid flow rate belongs to the prior art and will not be introduced in detail here.

[0069] Furthermore, in order to ensure the installation stability of the water flow component 4 in the water inlet passage 12, the water path proportional valve further includes a fixed retaining ring 5, and the fixed retaining ring 5 is installed in the water inlet passage 12 and abuts against the water flow component 4 to ensure the installation stability of the water flow component 4.

[0070] In one embodiment, referring to Figure 2 and Figure 7 , a check valve 7 is arranged in the bypass passage 14. The check valve 7 can prevent the water flow outside the water path proportional valve from flowing into the valve cavity 11 through the bypass passage 14, avoiding affecting the normal operation of the water path proportional valve.

[0071] Furthermore, in one embodiment, the opening area of the first water outlet 1143 is larger than the opening area of the second water outlet 1141.

[0072] With this arrangement, it can fully ensure that in the third working state, the bypass water ratio is greater than the bypass water ratio in the second working state.

[0073] A second communication hole 131 is provided on the valve body 1 between the outlet end of the first cavity 111 and the water outlet passage 13. A third communication hole 141 is provided on the valve body 1 between the third cavity 113 and the bypass passage 14.

[0074] In one embodiment, the sum of the flow areas of the first water outlet 1143 and the second water outlet 1141 is smaller than the flow area of the third communication hole 141. With such a setting, on the one hand, it can ensure that when the water path proportional valve is in the third working state, the water flow flowing out from the first water outlet 1143 and the second water outlet 1141 in the second cavity 112 can fully flow out from the third communication hole 141, ensuring the stability of the bypass water ratio when the water path proportional valve is in the third working state. On the other hand, it can also ensure that when the bypass water ratio valve is in the second working state, the water flow flowing out from the second water outlet 1141 in the second cavity 112 can fully flow out from the third communication hole 141, ensuring the stability of the bypass water ratio when the water path proportional valve is in the second working state.

[0075] See Figure 4 , in one embodiment, the valve body 1 protrudes with a first mounting portion 15. The first mounting portion 15 is provided with a first mounting groove 151. The first mounting groove 151 communicates with the first cavity 111. The first mounting groove 151 is coaxially arranged with the water inlet pipe 1144. The first control valve 2 is installed in the first mounting groove 151.

[0076] The provision of the first mounting portion 15 and the first mounting groove 151 can ensure the stable installation of the first control valve 2.

[0077] See Figure 4 , in one embodiment, the valve body 1 protrudes with a second mounting portion 16. The second mounting portion 16 is provided with a second mounting groove 161. The second mounting groove 161 communicates with the third cavity 113. The second mounting groove 161 is coaxially arranged with the water outlet pipe 1145. The second control valve 3 is installed in the second mounting groove 161.

[0078] The provision of the second mounting portion 16 and the second mounting groove 161 can ensure the stable installation of the second control valve 3.

[0079] Further, in one embodiment, the first control valve 2 and the second control valve 3 are installed at a preset angle.

[0080] Optionally, the preset angle is 90°, that is, the first control valve 2 and the second control valve 3 are installed at a right angle to ensure the smooth installation of the water path proportional valve on the water heater. Of course, in other embodiments, the preset angle can also be set to other values as needed.

[0081] Further, in one embodiment, see Figures 4-8, an inner partition 115 is further provided in the valve cavity 11. The water inlet pipe 1144 and the water outlet pipe 1145 are arranged at an angle and communicate with each other. The inner pipe 114 is arranged in the valve cavity 11, passes through the inner partition 115, and is fixedly connected to the inner partition 115. An outer cavity is formed by surrounding between the outer side wall of the inner pipe 114 and the inner side wall of the valve cavity 11. The inner partition 115 divides the outer cavity into a first cavity 111 and a third cavity 113.

[0082] Further, in one embodiment, refer to Figures 7-9 , the inner pipe 114 includes a water inlet pipe 1144 and a water outlet pipe 1145. The water inlet pipe 1144 and the water outlet pipe 1145 are arranged at an angle and communicate with each other. The water inlet pipe 1144 is located in the first cavity 111, and the water inlet 1142 is arranged on the water inlet pipe 1144; the water outlet pipe 1145 is located in the third cavity 113, and the first water outlet 1143 and the second water outlet 1141 are arranged on the water outlet pipe 1145.

[0083] Optionally, the water inlet pipe 1144 and the water outlet pipe 1145 are arranged at a right angle.

[0084] Further, in one embodiment, refer to Figure 6 , a communication groove 121 is provided in the valve body 1. The water inlet passage 12 communicates with the first cavity 111 through the communication groove 121, and the communication groove 121 faces the water inlet pipe 1144.

[0085] The communication groove 121 faces the water inlet pipe 1144. With such a setting, the outer wall of the water inlet pipe 1144 can divide and buffer the water flow passing through the communication groove 121, making the water flow entering the first cavity 111 more uniform and without generating eddy currents, fully ensuring the smooth water outlet of the water outlet passage 13 and the stability of the bypass water ratio.

[0086] Exemplarily, in this embodiment, the working process of the water path proportional valve is as follows:

[0087] Specifically, refer to Figure 6 , when the water path proportional valve is in the first working state, both the first control valve 2 and the second control valve 3 are in the closed state. The valve body of the first control valve 2 blocks the water inlet 1142, the water inlet 1142 is in the closed state, and the first cavity 111 and the second cavity 112 are in the truncated state; the valve body of the second control valve 3 blocks the first water outlet 1143. The external water flow enters the first cavity 111 from the water inlet passage 12 through the communication groove 121, and then flows to the water outlet passage 13 through the second communication hole 131. The flow rate of the bypass passage 14 is zero.

[0088] Specifically, refer to Figure 9, when the waterway proportional valve is in the second working state, the first control valve 2 is in the open state, the valve body of the first control valve 2 leaves the water inlet 1142, and the water inlet 1142 is in the open state, so that the first cavity 111 communicates with the second cavity 112 through the water inlet 1142; the second control valve 3 is in the closed state, and the valve body of the second control valve 3 blocks the first water outlet 1143. At this time, a part of the water flowing into the first cavity 111 flows out through the water outlet channel 13, and the other part enters the second cavity 112 from the water inlet 1142. The water in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the water in the third cavity 113 can flow out through the bypass channel 14.

[0089] Specifically, refer to Figure 10 , when the waterway proportional valve is in the third working state, both the first control valve 2 and the second control valve 3 are in the open state. The valve body of the first control valve 2 is away from the water inlet 1142 to make the water inlet 1142 in the open state, and the valve body of the second control valve 3 is away from the first water outlet 1143 to make the first water outlet 1143 in the open state. At this time, a part of the water flowing into the first cavity 111 flows out through the water outlet channel 13, and the other part enters the second cavity 112 from the water inlet 1142; a part of the water in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the other part flows from the first water outlet 1143 to the third cavity 113. The water in the third cavity 113 can flow out through the bypass channel 14.

[0090] It can be understood that the bypass water ratio in the third working state is higher than that in the second working state.

[0091] Embodiment 2

[0092] This embodiment provides a water heater, which includes the waterway proportional valve of Embodiment 2.

[0093] Optionally, in this embodiment, the water heater is a gas water heater. Of course, in other embodiments, the water heater can also be an electric water heater.

[0094] Specifically, in this embodiment, the water heater includes a heat exchanger. The waterway proportional valve is installed on the heat exchanger, and cold water is supplied to the heat exchanger of the water heater through the water inlet channel 12, the first cavity 111 and the water outlet channel 13, and bypass water is introduced into the water outlet pipe of the water heater through the bypass channel 14. When the outlet water temperature of the water heater is relatively high, the bypass water conveyed by the bypass channel 14 can reduce the outlet water temperature of the water heater.

[0095] When bypass water is not required and the water path proportional valve is controlled to be in the first working state, both the first control valve 2 and the second control valve 3 are in the closed state. The valve body of the first control valve 2 blocks the water inlet 1142, the water inlet 1142 is in the closed state, and the first cavity 111 and the second cavity 112 are in the cut-off state; the valve body of the second control valve 3 blocks the first water outlet 1143. The external water flow enters the first cavity 111 from the water inlet passage 12 via the communication groove 121, and then flows to the water outlet passage 13 via the second communication hole 131. The flow rate of the bypass passage 14 is zero.

[0096] Specifically, when a smaller proportion of bypass water is required and the water path proportional valve is controlled to be in the second working state, the first control valve 2 is in the open state, the valve body of the first control valve 2 leaves the water inlet 1142, and the water inlet 1142 is in the open state, so that the first cavity 111 communicates with the second cavity 112 through the water inlet 1142; the second control valve 3 is in the closed state, and the valve body of the second control valve 3 blocks the first water outlet 1143. At this time, a part of the water flow entering the first cavity 111 flows out from the water outlet passage 13, and the other part enters the second cavity 112 from the water inlet 1142, and the water flow in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the water flow in the third cavity 113 can flow out from the bypass passage 14.

[0097] Specifically, when a larger proportion of bypass water is required and the water path proportional valve is in the third working state, both the first control valve 2 and the second control valve 3 are in the open state. The valve body of the first control valve 2 is far away from the water inlet 1142 to make the water inlet 1142 in the open state, and the valve body of the second control valve 3 is far away from the first water outlet 1143 to make the first water outlet 1143 in the open state. At this time, a part of the water flow entering the first cavity 111 flows out from the water outlet passage 13, and the other part enters the second cavity 112 from the water inlet 1142; a part of the water in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the other part flows from the first water outlet 1143 to the third cavity 113, and the water flow in the third cavity 113 can flow out from the bypass passage 14.

[0098] Embodiment III

[0099] This embodiment provides a control method for a water path proportional valve, which is used to control the water path proportional valve in Embodiment I.

[0100] Specifically, in this embodiment, the control method of the water path proportional valve is used to control the water path proportional valve in Embodiment I, and can control the water path proportional valve to be in the first working state, the second working state or the third working state.

[0101] In the first working state, control the first control valve 2 to close the water inlet 1142, and control the second control valve 3 to close the first water outlet 1143;

[0102] In the second working state, control the first control valve 2 to open the water inlet 1142, and control the second control valve 3 to close the first water outlet 1143;

[0103] In the third working state, control the first control valve 2 to open the water inlet 1142, and control the second control valve 3 to open the first water outlet 1143.

[0104] When bypass water is not needed and the water path proportional valve is controlled to be in the first working state, both the first control valve 2 and the second control valve 3 are in the closed state. The valve body of the first control valve 2 blocks the water inlet 1142, the water inlet 1142 is in the closed state, and the first cavity 111 and the second cavity 112 are in the cut-off state; the valve body of the second control valve 3 blocks the first water outlet 1143. The external water flow enters the first cavity 111 from the water inlet channel 12 via the communication groove 121, and then flows to the water outlet channel 13 via the second communication hole 131. The flow rate of the bypass channel 14 is zero.

[0105] Specifically, when a smaller bypass water ratio is required and the water path proportional valve is controlled to be in the second working state, the first control valve 2 is in the open state, the valve body of the first control valve 2 leaves the water inlet 1142, the water inlet 1142 is in the open state, so that the first cavity 111 is communicated with the second cavity 112 through the water inlet 1142; the second control valve 3 is in the closed state, the valve body of the second control valve 3 blocks the first water outlet 1143. At this time, a part of the water flow entering the first cavity 111 flows out from the water outlet channel 13, and the other part enters the second cavity 112 from the water inlet 1142, and the water flow in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the water flow in the third cavity 113 can flow out from the bypass channel 14.

[0106] Specifically, when a larger bypass water ratio is required and the water path proportional valve is in the third working state, both the first control valve 2 and the second control valve 3 are in the open state. The valve body of the first control valve 2 is far away from the water inlet 1142 to make the water inlet 1142 in the open state, and the valve body of the second control valve 3 is far away from the first water outlet 1143 to make the first water outlet 1143 in the open state. At this time, a part of the water flow entering the first cavity 111 flows out from the water outlet channel 13, and the other part enters the second cavity 112 from the water inlet 1142; a part of the water in the second cavity 112 flows from the second water outlet 1141 to the third cavity 113, and the other part flows from the first water outlet 1143 to the third cavity 113, and the water flow in the third cavity 113 can flow out from the bypass channel 14.

[0107] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as within the scope described in this specification.

[0108] The specific content of the above specific embodiments only expresses several embodiments of the present utility model, and its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. Waterway proportional valve, characterized in that Comprising: A valve body (1), the valve body (1) comprising a valve cavity (11), a water inlet channel (12), a water outlet channel (13) and a bypass channel (14), the valve cavity (11) comprising a first cavity (111) and a third cavity (113), the water inlet channel (12) communicating with the inlet end of the first cavity (111), the outlet end of the first cavity (111) communicating with the water outlet channel (13), and the third cavity (113) communicating with the bypass channel (14); An inner pipe (114), disposed in the valve body (1); the inner pipe (114) is provided with a second cavity (112), as well as a water inlet (1142), a first water outlet (1143) and a second water outlet (1141) communicating with the second cavity (112), the second cavity (112) communicating with the first cavity (111) through the water inlet (1142); the second cavity (112) communicating with the third cavity (113) through the first water outlet (1143) and the second water outlet (1141); A first control valve (2), disposed in the valve body (1), for controlling the opening and closing of the water inlet (1142); A second control valve (3), disposed in the valve body (1), for controlling the opening and closing of the first water outlet (1143).

2. The waterway proportional valve according to claim 1, wherein An inner partition (115) is further disposed in the valve cavity (11), the inner pipe (114) is disposed in the valve cavity (11), the inner pipe (114) passes through the inner partition (115) and is fixedly connected to the inner partition (115), an outer cavity is formed by enclosing between the outer side wall of the inner pipe (114) and the inner side wall of the valve cavity (11), and the inner partition (115) divides the outer cavity into the first cavity (111) and the third cavity (113).

3. The waterway proportional valve according to claim 2, characterized in that, The inner pipe (114) comprises a water inlet pipe (1144) and a water outlet pipe (1145), the water inlet pipe (1144) is located in the first cavity (111), and the water inlet (1142) is disposed on the water inlet pipe (1144); the water outlet pipe (1145) is located in the third cavity (113), and the first water outlet (1143) and the second water outlet (1141) are disposed on the water outlet pipe (1145).

4. The waterway proportional valve according to claim 3, characterized in that, A communication groove (121) is provided in the valve body (1), the water inlet channel (12) communicates with the first cavity (111) through the communication groove (121), and the communication groove (121) faces the water inlet pipe (1144).

5. The waterway proportional valve according to claim 3, characterized in that The valve body (1) protrudes with a first mounting portion (15), the first mounting portion (15) is provided with a first mounting groove (151), the first mounting groove (151) communicates with the first cavity (111), the first mounting groove (151) is coaxially arranged with the water inlet pipe (1144), and the first control valve (2) is mounted in the first mounting groove (151).

6. The waterway proportional valve according to claim 3, characterized in that The valve body (1) is convexly provided with a second mounting portion (16), the second mounting portion (16) is provided with a second mounting groove (161), the second mounting groove (161) communicates with the third cavity (113), the second mounting groove (161) is coaxially arranged with the water outlet pipe (1145), and the second control valve (3) is installed in the second mounting groove (161).

7. The waterway proportional valve according to claim 3, characterized in that The first control valve (2) and the second control valve (3) are installed at a preset angle.

8. The waterway proportional valve according to claim 1, wherein The opening area of the first water outlet (1143) is larger than the opening area of the second water outlet (1141).

9. The waterway proportional valve according to any one of claims 1-8, characterized in that, Both the first control valve (2) and the second control valve (3) adopt pilot-operated solenoid valves.

10. Water heater, characterized in that, It includes a water path proportional valve according to any one of claims 1-9.

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