Cold and hot water valve and water supply system
By incorporating auxiliary pipes and filter screens in the hot and cold water valves, the problem of hot water flow being affected by impurity accumulation and cross-contamination is solved, enabling stable operation of the self-cleaning function and zero-cold-water mode.
Patent Information
- Application Number
- CN202423067022.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The hot water inlet filter of the existing hot and cold water valve accumulates impurities after long-term use, affecting the hot water flow. In zero cold water mode, impurities are adsorbed at the sealing gasket, causing water leakage problems.
Design a hot and cold water valve that connects a first channel and a second channel via an auxiliary pipe. The one-way valve only allows fluid to flow from the first channel to the second channel. The opening structure of the filter screen is set towards the second channel. Impurities are adsorbed on the outer surface of the filter screen in zero cold water mode and are discharged by the water flow when hot water is used, thus achieving a self-cleaning function.
This effectively prevents impurities from adsorbing onto the one-way valve, reduces water leakage caused by poor sealing, and ensures the realization of the zero-cold-water function.
Smart Images
Figure CN223469759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve technical field especially, relates to a cold and hot water valve and water supply system. BACKGROUND
[0002] Water supply system, such as water heater water supply system or wall-hanging stove water supply system etc., is usually used to provide water for user. Conventional water supply system usually includes hot water supply device, cold water pipe, hot water pipe, water mixing valve and the like structure;Among them, the water heated by hot water supply device is connected with water mixing valve through hot water pipe, to mix the hot water supplied by hot water supply device and the cold water supplied by cold water pipe into temperature suitable water by water mixing valve, and supply to water end (such as shower, faucet and the like water outlet structure), to supply user to use.
[0003] In related art, in order to make traditional water supply system have zero cold water function, cold and hot water valve is usually configured in water supply system, and this cold and hot water valve is usually arranged close to water end, and the cold and hot water valve is connected in cold water pipe and hot water pipe to form backwater waterway in water supply system, so that when zero cold water mode is opened, the cold water of water end is first backflowed to hot water supply device through the backwater waterway, and then supplied to water end after hot water supply device is heated, so that cold water at the initial stage of opening water end can be avoided.
[0004] In the existing technology, the filter screen arranged at the hot water inlet end of cold and hot water valve, in long-time filtration, impurities are accumulated, which can affect hot water flow;When zero cold water mode is opened, part of impurities passes through filter screen, and impurities are adsorbed at sealing gasket, which affects sealing and can cause water leakage.
[0005] Therefore, it is urgent to design a new cold and hot water valve to solve the above problems. UTILITY MODEL CONTENTS
[0006] The utility model discloses a cold and hot water valve and water supply system, solve the technical problem that in the prior art, when zero cold water mode is opened, impurities are adsorbed at sealing gasket at the hot water inlet end of cold and hot water valve, which affects sealing and can cause water leakage.
[0007] To achieve this purpose, the utility model adopts the following technical scheme:
[0008] The utility model provides a cold and hot water valve, including valve body, the valve body includes at least four end junction's inlet and outlet water connector, the end of inlet and outlet water connector open setting, form first inlet and outlet water port, second inlet and outlet water port, third inlet and outlet water port and fourth inlet and outlet water port on the valve body, the first inlet and outlet water port with the fourth inlet and outlet water port always communicate in the valve body forms first channel, the second inlet and outlet water port with the third inlet and outlet water port always communicate in the valve body forms second channel, the first channel with the second channel is provided with the auxiliary pipe and communicates, one -way valve is provided between the auxiliary pipe and the second channel, one -way valve only allows fluid to flow from the first channel to the second channel,
[0009] The cold and hot water valve further includes a filter screen cover penetrating the auxiliary pipe, one end of the filter screen cover is provided with an opening structure, and the end of the filter screen cover provided with the opening structure faces the second channel.
[0010] The cold and hot water valve is communicated with the first channel and the second channel by the auxiliary pipe, the one-way valve only allows fluid to flow from the first channel to the second channel, the filter screen cover penetrates the auxiliary pipe, and the end of the filter screen cover provided with the opening structure faces the second channel.
[0011] When the zero cold water mode, one-way valve opens, water flows from the first channel to the second channel, when passing through the filter screen cover in the auxiliary pipe, impurities are adsorbed on the outer surface of the filter screen cover; when using hot water, the one-way valve is closed, and the hot water flows in the first channel, and the impurities on the outer surface of the filter screen cover are discharged with the water flow under the impact of the water flow, so that the self-cleaning effect is achieved, thereby avoiding the problem that the impurities pass through the filter screen cover and are adsorbed on the one-way valve, and the problem of water leakage caused by poor sealing of the one-way valve due to impurities is greatly reduced.
[0012] As a preferred scheme of the above-mentioned cold and hot water valve, the filter screen cover includes a screen cover body and a screen cover end portion connected thereto, the longitudinal section of the screen cover body is circular or polygonal, and the size of the screen cover end portion gradually decreases from one end connected to the screen cover body to the other end.
[0013] The structure of the above-mentioned filter screen cover is simple and convenient to manufacture.
[0014] As a preferred scheme of the above-mentioned cold and hot water valve, the filter screen cover is a conical structure, and the end of the conical structure with a larger diameter is provided with the opening structure.
[0015] The filter screen cover is a conical structure, so that the water flow is diverged from the conical point, effectively impacting the conical surface, and the cleaning effect on impurities is good.
[0016] As a preferred solution of the cold and hot water valve, the first water inlet and outlet and the second water inlet and outlet are arranged opposite along the axial direction of the auxiliary pipe, the auxiliary pipe is located between the first water inlet and outlet and the second water inlet and outlet, one end of the filter screen cover without the opening structure is a closed end, the cavity of the water inlet and outlet connector provided with the first water inlet is a first cavity, and the closed end extends into the first cavity.
[0017] The above arrangement makes the total water passing area of the filter screen cover greater than the water passing sectional area of the auxiliary pipe, and does not affect the water passing flow when impurities are adsorbed on the filter screen cover.
[0018] As a preferred solution of the cold and hot water valve, the water inlet and outlet connector provided with the first water inlet, the water inlet and outlet connector provided with the second water inlet and the auxiliary pipe are coaxially arranged.
[0019] The above arrangement makes the water inlet and outlet connector provided with the first water inlet, the water inlet and outlet connector provided with the second water inlet and the auxiliary pipe linearly arranged, so that the cold and hot water valve has a simple structure and is easy to manufacture.
[0020] As a preferred solution of the cold and hot water valve, the filter screen cover is fixed in the first cavity by the anti-falling fixing member.
[0021] The filter screen cover is fixed by the anti-falling fixing member, so that the filter screen cover is prevented from falling off due to the impact of water flow.
[0022] As a preferred solution of the cold and hot water valve, the anti-falling fixing member is provided with a fixing hole, the anti-falling fixing member is installed in the first cavity, and the anti-falling fixing member is sleeved on and pressed against the closed end of the filter screen cover through the fixing hole.
[0023] The anti-falling fixing member is sleeved on and pressed against the filter screen cover through the fixing hole, so that the filter screen cover can be pressed to prevent the filter screen cover from falling off, and the fixing of the filter screen cover is more convenient and fast.
[0024] As a preferred solution of the cold and hot water valve, a plurality of water flow holes are arranged in the circumferential direction of the fixing hole of the anti-falling fixing member.
[0025] The water flow holes are arranged to make the first channel in an open state and play a water passing role.
[0026] As a preferred solution of the cold and hot water valve, the total sectional area of the fixing hole and the water flow hole is greater than or equal to the minimum sectional area of the second water inlet and outlet.
[0027] The above arrangement can avoid the phenomenon of water flow being cut off in the first channel.
[0028] The utility model also provides a water supply system, including hot water pipe, cold water pipe, water end and hot water supply device, water end and hot water supply device between through hot water pipe and cold water pipe link to form water pipeline, also include the cold hot water valve like above, the cold hot water valve is connected in water pipeline, and can form the backwater circulation waterway for the circulation heating of water in the hot water pipe between water end and hot water supply device.
[0029] The water supply system greatly reduces the problem of water leakage caused by poor sealing of the one-way valve due to impurities through the self-cleaning function of the cold and hot water valve.
[0030] The utility model discloses the beneficial effect:
[0031] The cold and hot water valve provided by the utility model is connected with the first channel and the second channel through the auxiliary pipe, the one-way valve only allows fluid to flow from the first channel to the second channel, the filter screen cover is arranged in the auxiliary pipe, one end of the filter screen cover with the opening structure faces the second channel, and the other end extends to the first channel along the axial direction of the auxiliary pipe.
[0032] In the zero cold water mode, the one-way valve is opened, water flows from the first channel to the second channel, and impurities are adsorbed on the outer surface of the filter screen cover when passing through the filter screen cover in the auxiliary pipe; when hot water is used, the one-way valve is closed, and hot water flows in the first channel; the impurities on the outer surface of the filter screen cover are discharged with the water flow under the impact of the water flow, so as to play a self-cleaning role, thereby avoiding that the impurities pass through the filter screen cover and are adsorbed on the one-way valve, and greatly reducing the problem of water leakage caused by poor sealing of the one-way valve due to impurities.
[0033] The water supply system provided by the utility model greatly reduces the problem of water leakage caused by poor sealing of the one-way valve due to impurities through the self-cleaning function of the cold and hot water valve, and can also realize the function of zero cold water. DRAWINGS
[0034] Figure 1 It is the structure schematic view of the cold and hot water valve provided by the utility model embodiment one;
[0035] Figure 2 It is the plan view of the cold and hot water valve provided by the utility model embodiment one;
[0036] Figure 3 It is Figure 2 The sectional view along A-A direction;
[0037] Figure 4 It is the sectional view of the cold and hot water valve provided by the utility model embodiment one and shows the internal structure;
[0038] Figure 5 is a structure schematic view of the filter net cover provided by the embodiment one of the utility model;
[0039] Figure 6 is a structure schematic view of the anti-off fixing part provided by the embodiment one of the utility model;
[0040] Figure 7 is a sectional view of another cold and hot water valve provided by the embodiment one of the utility model;
[0041] Figure 8 is a structure schematic view of the water supply system provided by the embodiment one of the utility model;
[0042] Figure 9 is a structure schematic view of the water supply system provided by the embodiment two of the utility model.
[0043] In the drawing:
[0044] 1, valve body;11, first joint;111, first water inlet and outlet;112, first cavity;12, second joint;121, second water inlet and outlet;13, third joint;131, third water inlet and outlet;14, fourth joint;141, fourth water inlet and outlet;15, mounting table;16, baffle;161, communication hole;
[0045] 2, auxiliary pipe;20, water passing gap;21, filter net cover;211, net cover main body;212, net cover end;210, opening structure;22, anti-off fixing part;221, fixing hole;222, water flowing hole;
[0046] 3, check valve;30, mounting groove;31, mounting seat;311, guide groove;312, hollow;32, valve core;321, guide rod;33, elastic piece;
[0047] 4, flow restrictor;a, first passage;B, second passage;
[0048] 100, hot water pipe;200, cold water pipe;300, water end;400, hot water supply device;500, backwater pipe. DETAILED DESCRIPTION
[0049] The utility model will be further explained in detail below in combination with the drawings and embodiments.It can be understood that the specific embodiments described here are only for explaining the utility model, and not for limiting the utility model.In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawings, and not all structures.
[0050] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0051] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0052] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0053] Example 1:
[0054] like Figure 8 As shown, this embodiment provides a water supply system, including a hot water pipe 100, a cold water pipe 200, a water end 300, a hot water supply device 400 and a mixing valve; wherein, the water heated by the hot water supply device 400 is connected to the mixing valve through the hot water pipe 100, so that the hot water supplied by the hot water supply device 400 and the cold water supplied by the cold water pipe 200 are mixed into water with a suitable temperature by the mixing valve, and the water is supplied to the water end 300 (such as a water outlet structure such as a shower head or a faucet) for user use.
[0055] In order to enable a traditional water supply system to have a zero cold water function, a hot and cold water valve is usually configured in the water supply system. This hot and cold water valve is usually set near the water end 300. The hot and cold water valve is connected to the cold water pipe 200 and the hot water pipe 100 to form a return water path in the water supply system. Therefore, when the zero cold water mode is turned on, the cold water from the water end 300 is first returned to the hot water supply device 400 through the return water path, and then supplied to the water end 300 after being heated by the hot water supply device 400. This can avoid the appearance of cold water in the initial stage of the water end 300 being turned on.
[0056] In the existing technology, the filter screen installed at the hot water inlet end of the hot and cold water valve will accumulate impurities during long-term filtration, which will affect the hot water flow rate; when the zero cold water mode is turned on, some impurities pass through the filter screen and are adsorbed on the sealing gasket of the one-way valve, affecting the seal and causing water cross-contamination.
[0057] In order to solve the above problems, Figures 1-4 As shown, this embodiment provides a hot and cold water valve, comprising a valve body 1. The valve body 1 includes at least four water inlet and outlet joints with intersecting ends, the ends of which are open. A first water inlet and outlet 111, a second water inlet and outlet 121, a third water inlet and outlet 131, and a fourth water inlet and outlet 141 are formed on the valve body 1. The first water inlet and outlet 111 and the fourth water inlet and outlet 141 are always connected to form a first channel a within the valve body 1, and the second water inlet and outlet 121 and the third water inlet and outlet 131 are always connected to form a second channel b within the valve body 1. When used in a water supply system, the first water inlet and outlet 111 is the hot water outlet, the fourth water inlet and outlet 141 is the hot water inlet, the second water inlet and outlet 121 is the cold water inlet, and the third water inlet and outlet 131 is the cold water outlet. An auxiliary pipe 2 is provided between the first channel a and the second channel b to connect them. A one-way valve 3 is provided between the auxiliary pipe 2 and the second channel b. The one-way valve 3 only allows fluid to flow from the first channel a to the second channel b. The hot and cold water valve also includes a filter mesh sleeve 21 that is inserted into the auxiliary pipe 2. An opening structure 210 is provided at one end of the filter mesh sleeve 21. The end of the filter mesh sleeve 21 with the opening structure 210 is arranged toward the second channel b, and the other end of the filter mesh sleeve 21 extends toward the first channel a. In this embodiment, the filter mesh sleeve 21 extends along the axial direction of the auxiliary pipe 2.
[0058] The hot and cold water valve connects the first channel a and the second channel b by setting an auxiliary pipe 2. The one-way valve 3 only allows the fluid to flow from the first channel a to the second channel b. The filter mesh sleeve 21 is passed through the auxiliary pipe 2. One end of the filter mesh sleeve 21 with the opening structure 210 is set toward the second channel b, and the other end extends along the axial direction of the auxiliary pipe 2 toward the first channel a.
[0059] When the cold water mode is used, the one-way valve 3 is opened, and water flows from the first channel a to the second channel b. When the hot water mode is used, the one-way valve 3 is closed, and hot water flows in the first channel a. The impurities on the outer surface of the filter mesh sleeve 21 are washed away by the water flow, thereby avoiding the problem of water leakage caused by the poor sealing of the one-way valve 3 due to the impurities.
[0060] In this embodiment, as shown in Figures 3-5 , the filter mesh sleeve 21 has a conical structure, and the larger-diameter end of the conical structure is provided with an open structure 210. The filter mesh sleeve 21 has a conical structure, so that the water flow is dispersed from the conical point and effectively impacts the conical surface, thereby achieving good cleaning effect on the impurities.
[0061] In other embodiments, as shown in Figure 7 , the filter mesh sleeve 21 includes a mesh sleeve body 211 and a mesh sleeve end portion 212 connected to each other. The longitudinal section of the mesh sleeve body 211 is circular or polygonal, and the size of the mesh sleeve end portion 212 gradually decreases from the end connected to the mesh sleeve body 211 to the other end. The above-mentioned filter mesh sleeve 21 has a simple structure and is easy to manufacture.
[0062] In this embodiment, the first water inlet and outlet 111 and the second water inlet and outlet 121 are arranged opposite to each other along the axial direction of the auxiliary pipe 2, and the auxiliary pipe 2 is located between the first water inlet and outlet 111 and the second water inlet and outlet 121. One end of the filter mesh sleeve 21, which is not provided with the open structure 210, is a closed end, and the cavity of the water inlet and outlet joint provided with the first water inlet and outlet 111 is a first cavity 112 (see Figure 3 and Figure 4 ). The closed end extends into the first cavity 112. The above-mentioned arrangement makes the total water passage area of the filter mesh sleeve 21 greater than the water passage cross-sectional area of the auxiliary pipe 2, so that the water passage flow rate in the cold water mode is not affected when the impurities are adsorbed on the filter mesh sleeve 21. It should be noted that the closed end is only not provided with the open structure 210, and does not affect the water passage and filtering effect of the filter mesh sleeve 21.
[0063] As shown in Figure 4 , the filter mesh sleeve 21 is fixed in the first cavity 112 by a anti-dropping fixing member 22. The filter mesh sleeve 21 is fixed by the anti-dropping fixing member 22 to prevent the filter mesh sleeve 21 from falling off due to the impact of the water flow.
[0064] Specifically, as shown in Figure 6As shown, the anti-falling fixing member 22 is provided with a fixing hole 221, and the anti-falling fixing member 22 is installed in the first cavity 112 and abuts against the closed end of the filter screen cover 21 through the fixing hole 221. The anti-falling fixing member 22 abuts against the filter screen cover 21 through the fixing hole 221, and can press the filter screen cover 21 to prevent the filter screen cover 21 from falling off, thereby conveniently and quickly fixing the filter screen cover 21.
[0065] Further, the anti-falling fixing member 22 is provided with a plurality of water flow holes 222 in the circumferential direction of the fixing hole 221. The water flow holes 222 are provided to keep the first channel a in an open state and play a role of water flow.
[0066] In this embodiment, the total cross-sectional area of the fixing hole 221 and the water flow hole 222 is greater than or equal to the minimum cross-sectional area of the second water inlet / outlet 121. The above-mentioned arrangement can avoid the phenomenon of water flow being cut off when the water flows in the first channel a.
[0067] As shown in Figure 3 and Figure 4 The one-way valve 3 includes a mounting seat 31, a valve core 32 and an elastic member 33. The mounting seat 31 is arranged in the valve body 1 and connected to the end of the second joint 12 close to the second water inlet / outlet 121. The mounting seat 31 is provided with a hollow 312 to enable the fluid to enter the second joint 12 through the hollow 312.
[0068] Optionally, the mounting seat 31 is provided with a guide groove 311 at the end close to the auxiliary pipe 2, the valve core 32 is slidingly arranged in the guide groove 311, and the elastic member 33 is clamped between the valve core 32 and the mounting seat 31 to apply an elastic force to the valve core 32, so that the valve core 32 abuts against the right end surface of the auxiliary pipe 2 to achieve the plugging of the auxiliary pipe 2. Specifically, the elastic member 33 can be a spring.
[0069] In order to facilitate the installation of the elastic member 33, the valve core 32 includes a guide rod 321, the elastic member 33 is sleeved outside the guide rod 321, and the guide rod 321 is slidingly arranged in the guide groove 311. The end of the valve core 32 close to the mounting seat 31 is provided with a mounting groove 30, and the elastic member 33 is limited in the mounting groove 30 to make the installation of the elastic member 33 stable and avoid the inclination of the elastic member 33 to affect the reliability of the one-way valve 3.
[0070] Although the one-way valve 3 is arranged between the auxiliary pipe 2 and the second water inlet / outlet 121, and the fluid is limited to flow only from the first channel a to the second channel b through the one-way valve 3, the fluid in the second channel b cannot flow to the first channel a. However, when the fluid in the second channel b flows too fast, the pressure on the one-way valve 3 is reduced, the one-way valve 3 is opened by negative pressure, and the one-way valve 3 is disabled.
[0071] To solve the above problems, a flow restrictor 4 is arranged in the second channel b in the embodiment to reduce the flow rate in the second channel b, so that the fluid in the second channel b keeps a larger pressure on the one-way valve 3, thereby protecting the one-way valve 3 from being sucked open by negative pressure.
[0072] Optionally, as shown in Figure 2 The one-way valve 3 is arranged at the second water inlet / outlet port 121 and occupies the internal space of the second joint 12, so the flow restrictor 4 is arranged at the third water inlet / outlet port 131, and the installation space is sufficient and convenient. The flow restrictor 4 can adopt a flow restrictor ring or other flow restrictor commonly used in the prior art, and the specific flow restricting form is not limited here.
[0073] In the embodiment, the first water inlet / outlet port 111, the fourth water inlet / outlet port 141 and the second water inlet / outlet port 121 are communicated through the auxiliary pipe 2, and the one-way valve 3 only needs to block the auxiliary pipe 2. The valve core 32 of the one-way valve 3 can directly block the one-way valve 3, so the valve body structure of the one-way valve 3 can be omitted. At the same time, the one-way valve 3 does not need to be sealingly connected with the inner wall of the valve body 1, and the sealing ring and other sealing structures can be omitted. Therefore, the structure of the one-way valve 3 can be greatly simplified, which is conducive to reducing the overall size of the hot and cold water valve; at the same time, it is conducive to reducing the leakage points and improving the anti-water mixing performance of the hot and cold water valve.
[0074] In the embodiment, the hot and cold water valve is generally cross-shaped, taking Figure 3 the perspective view as an example, the first joint 11 is located on the left side, the second joint 12 is located on the right side, the third joint 13 is located on the upper side, and the fourth joint 14 is located on the lower side. One end of the four water inlet / outlet joints is arranged to intersect each other so that part of the internal flow channel is communicated, and the other side of the four water inlet / outlet joints is arranged to be far away from each other, which is convenient for connecting different pipe sections and does not interfere with each other.
[0075] In the embodiment, as shown in Figure 8 The first water inlet / outlet port 111 is a hot water outlet port, the fourth water inlet / outlet port 141 is a hot water inlet port, the second water inlet / outlet port 121 is a cold water inlet port, and the third water inlet / outlet port 131 is a cold water outlet port. The hot and cold water valve is installed near the water end 300. The first water inlet / outlet port 111 is connected with the water end 300, the fourth water inlet / outlet port 141 is connected with the hot water supply device 400 through the hot water pipe 100; the second water inlet / outlet port 121 is connected with the cold water pipe 200, and the third water inlet / outlet port 131 is connected with the water end 300.
[0076] In order to obtain hot water with a desired temperature at the water using end 300, a mixing valve is connected between the hot water pipe 100 and the cold water pipe 200 and the cold hot water valve and the water using end 300 (not shown in the figure), and the hot water supplied by the hot water supply device 400 and the cold water supplied by the cold water pipe 200 are mixed into water with a suitable temperature by the mixing valve, and are supplied to the water using end 300 for use by the user. In the embodiment, the hot water supply device 400 is a wall-hanging stove, and in other embodiments, the hot water supply device 400 can be other heating devices with a water heating function, which are not specifically limited here.
[0077] For the water in the hot water pipe 100 between the water using end 300 and the hot water supply device 400, the hot water will become cold due to long-time non-use of hot water by the water using end 300, at which time the one-way valve 3 needs to be opened, and the water in the hot water pipe 100 between the cold hot water valve and the hot water supply device 400 is returned to the hot water supply device 400 through the third inlet and outlet port 131 by the circulating pump in the hot water supply device 400 to be reheated, which is a zero cold water mode. Since the cold hot water valve is arranged close to the water using end 300, the water in the hot water pipe 100 between the cold hot water valve and the water using end 300 can be ignored.
[0078] Specifically, in the zero cold water mode, the one-way valve 3 is opened, the first channel a and the second channel b are connected by the auxiliary pipe 2, the cold hot water valve, the hot water pipe 100, the cold water pipe 200, and the hot water supply device 400 form a backwater circulation waterway, the water in the hot water pipe 100 between the cold hot water valve and the hot water supply device 400 flows to the second channel b through the first channel a, and is supplied to the water using end 300 after being heated by the hot water supply device 400.
[0079] The water inlet and outlet connector provided with the first inlet and outlet port 111 (i.e., the first connector 11), the water inlet and outlet connector provided with the second inlet and outlet port 121 (i.e., the second connector 12), and the auxiliary pipe 2 are coaxially arranged to connect the linearly arranged pipes.
[0080] The water inlet and outlet connector provided with the third inlet and outlet port 131 (i.e., the third connector 13) and the water inlet and outlet connector provided with the fourth inlet and outlet port 141 (i.e., the fourth connector 14) are coaxially or non-coaxially arranged. As shown in Figure 3 The third connector 13 and the fourth connector 14 are non-coaxially arranged, and in other embodiments, the third connector 13 and the fourth connector 14 can be coaxial. The relative positions between the third connector 13 and the fourth connector 14 can be reasonably designed according to the design and arrangement of the pipes.
[0081] When the third joint 13 and the fourth joint 14 are coaxially arranged, the third joint 13 and the fourth joint 14 occupy a smaller space in the left-right direction, which can reduce the length of the first joint 11 and the second joint 12, and is more conducive to the miniaturization design of the hot and cold water valve. Furthermore, the mixed flow path of cold water and hot water is smaller, which is conducive to quickly completing the mixing.
[0082] When the third joint 13 and the fourth joint 14 are non-coaxially arranged, the third joint 13 can be closer to the second water inlet and outlet 121, and the fourth joint 14 can be closer to the first water inlet and outlet 111, which is conducive to shortening the first channel a and the second channel b, and improving the response speed of hot water and cold water.
[0083] Further, when the water inlet and outlet joint provided with the third water inlet and outlet 131 is non-coaxially arranged with the water inlet and outlet joint provided with the fourth water inlet and outlet 141, the projections of the two in the direction perpendicular to the axis (horizontal direction) are completely staggered or partially overlapped, and the axis of the third joint 13 and the fourth joint 14 is staggered by a distance H. Generally, the distance H≤5mm, but the distance H can be greater than 5mm according to needs, which is not limited here. That is, compared with the scheme in the prior art that the projection of the third joint 13 and the fourth joint 14 in the left-right direction must be partially overlapped, the design position of the third joint 13 and the fourth joint 14 in the left-right direction has greater flexibility.
[0084] From the process of partially overlapping to completely staggering the third joint 13 and the fourth joint 14, the overlapping area of the third joint 13 and the fourth joint 14 gradually decreases, and the mixed flow path of cold water and hot water in the first channel a and the second channel b gradually increases, thereby facilitating more uniform mixing of cold and hot water. Therefore, the relative position between the third joint 13 and the fourth joint 14 should be reasonably designed by comprehensively considering the required connection of the pipeline, the actual demand of cold and hot water mixing, etc.
[0085] Optionally, as shown in Figure 4 A baffle 16 is arranged inside the third joint 13, and the baffle 16 is provided with a communication hole 161, and the third joint 13 and the second joint 12 are communicated through the communication hole 161. Preferably, the baffle 16 is arranged at one end of the third joint 13 where the second joint 12 converges. Preferably, the baffle 16 and the valve body 1 are arranged in an integrated structure, which is convenient to process and has better structural strength.
[0086] Optionally, as shown in Figure 3As shown, in order to facilitate the connection of the auxiliary pipe 2, the inner wall of the valve body 1 is provided with a mounting table 15, and the end of the auxiliary pipe 2 facing the first water inlet / outlet port 111 is connected to the mounting table 15. The auxiliary pipe 2 and the inner wall of the valve body 1 are provided with a water passing gap 20 to communicate the second water inlet / outlet port 121 and the third water inlet / outlet port 131 through the water passing gap 20. By providing the mounting table 15, the auxiliary pipe 2 can be more conveniently connected to the side surface of the mounting table 15, thereby achieving coaxial installation with the first joint 11 and the second joint 12. At the same time, the mounting table 15 also functions to isolate the first joint 11 and the second joint 12, so that the first joint 11 and the second joint 12 can only be communicated through the auxiliary pipe 2. Preferably, the mounting table 15, the baffle 16 and the valve body 1 are provided in an integrated structure.
[0087] Specifically, the mounting table 15 is arranged at the intersection of the first joint 11, the second joint 12 and the fourth joint 14, and the auxiliary pipe 2 is arranged on the right side surface of the mounting table 15, so that the auxiliary pipe 2 extends into the second joint 12 to cooperate with the one-way valve 3 in the second joint 12. Part of the structure of the auxiliary pipe 2 is connected to the baffle 16, and the baffle 16, the mounting table 15, the auxiliary pipe 2 and the third joint 13 enclose the above-mentioned communication hole 161. When the third joint 13 needs to be staggered with the fourth joint 14 by a large distance, the length of the auxiliary pipe 2 can be appropriately increased, so that the third joint 13 is moved to the right to the required position. As long as there is a relative normal part between the inside of the third joint 13 and the auxiliary pipe 2, the above-mentioned communication hole 161 can be formed, thereby realizing the communication of the third joint 13 and the second joint 12. Therefore, through the arrangement of the auxiliary pipe 2, the position design range of the third joint 13 is also increased, so that the cold and hot water valve can be designed into more structure types, thereby improving the application range of the cold and hot water valve.
[0088] Embodiment two:
[0089] The embodiment provides a water supply system, and the position of the cold and hot water valve in the water supply system is different from that in the cold and hot water valve in the embodiment one, and the formed backwater circulating waterway is also different.
[0090] As shown in the drawings, Figure 9 The water supply system comprises a hot water pipe 100, a cold water pipe 200, a water using end 300 and a hot water supply device 400. The water using end 300 and the hot water supply device 400 are connected through the hot water pipe 100 and the cold water pipe 200 to form a water using pipeline. The water supply system further comprises a cold and hot water valve and a backwater pipe 500, and the cold and hot water valve is arranged close to the hot water supply device 400.
[0091] The first inlet and outlet water port 111 of the cold and hot water valve is blocked, the second inlet and outlet water port 121 is connected with the cold water pipe 200, the third inlet and outlet water port 131 is connected with the hot water supply device 400, and the fourth inlet and outlet water port 141 is connected with one end of the water end 300 of the hot water pipe 100 through the backwater pipe 500. The hot water pipe 100, the hot water supply device 400, the cold and hot water valve and the backwater pipe 500 form a backwater circulation water path.
[0092] In the zero cold water mode, the one-way valve 3 is opened, the first channel a and the second channel b are connected through the auxiliary pipe 2, the water in the hot water pipe 100 between the cold and hot water valve and the hot water supply device 400 flows to the second channel b through the first channel a, and is supplied to the water end 300 after being heated by the hot water supply device 400.
[0093] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation to the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the embodiments cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A hot and cold water valve, characterized in that The valve body (1) includes at least four end-to-end water inlet and outlet joints, the ends of which are open to form a first water inlet and outlet port (111), a second water inlet and outlet port (121), a third water inlet and outlet port (131), and a fourth water inlet and outlet port (141) on the valve body (1), the first water inlet and outlet port (111) and the fourth water inlet and outlet port (141) are always in communication in the valve body (1) to form a first channel (a), the second water inlet and outlet port (121) and the third water inlet and outlet port (131) are always in communication in the valve body (1) to form a second channel (b), an auxiliary pipe (2) is provided between the first channel (a) and the second channel (b) for communication, a one-way valve (3) is provided between the auxiliary pipe (2) and the second channel (b), the one-way valve (3) only allows fluid to flow from the first channel (a) to the second channel (b); The cold and hot water valve further comprises a filter screen cover (21) provided in the auxiliary pipe (2), one end of the filter screen cover (21) is provided with an opening structure (210), and the end of the filter screen cover (21) provided with the opening structure (210) is arranged towards the second channel (b), and the other end of the filter screen cover (21) extends towards the first channel (a).
2. The hot and cold water valve according to claim 1, wherein The filter screen cover (21) comprises a screen cover body (211) and a screen cover end (212) connected thereto, the longitudinal section of the screen cover body (211) is circular or polygonal, and the size of the screen cover end (212) gradually decreases from one end connected to the screen cover body (211) to the other end.
3. The hot and cold water valve according to claim 1, wherein The filter screen cover (21) is a conical structure, and the end with a larger diameter of the conical structure is provided with the opening structure (210).
4. The hot and cold water valve according to claim 1, wherein The first water inlet and outlet port (111) and the second water inlet and outlet port (121) are arranged opposite along the axial direction of the auxiliary pipe (2), the auxiliary pipe (2) is located between the first water inlet and outlet port (111) and the second water inlet and outlet port (121), the end of the filter screen cover (21) without the opening structure (210) is a closed end, the cavity of the water inlet and outlet joint provided with the first water inlet and outlet port (111) is a first cavity (112), and the closed end extends into the first cavity (112).
5. The hot and cold water valve according to claim 4, wherein The water inlet and outlet joint provided with the first water inlet and outlet port (111), the water inlet and outlet joint provided with the second water inlet and outlet port (121), and the auxiliary pipe (2) are coaxially arranged.
6. The hot and cold water valve according to claim 4, wherein The filter screen cover (21) is fixed in the first cavity (112) by a anti-dropping fixing member (22).
7. The hot and cold water valve according to claim 6, wherein The anti-dropping fixing member (22) is provided with a fixing hole (221), the anti-dropping fixing member (22) is installed in the first cavity (112), and the anti-dropping fixing member (22) is sleeved and pressed against the closed end of the filter screen cover (21) through the fixing hole (221).
8. The hot and cold water valve according to claim 7, wherein A plurality of water flow holes (222) are arranged in the circumferential direction of the fixing hole (221) of the anti-dropping fixing member (22).
9. The hot and cold water valve according to claim 8, wherein The total cross-sectional area of the fixing hole (221) and the water flow hole (222) is greater than or equal to the minimum cross-sectional area of the second water inlet and outlet (121).
10. A water supply system characterised by The invention comprises a hot water pipe (100), a cold water pipe (200), a water end (300) and a hot water supply device (400), wherein the water end (300) and the hot water supply device (400) are connected to each other via the hot water pipe (100) and the cold water pipe (200) to form a water pipe, and further comprises a hot and cold water valve according to any one of claims 1 to 9, wherein the hot and cold water valve is connected to the water pipe and can form a return water circulation water circuit for circulating and heating water in the hot water pipe (100) between the water end (300) and the hot water supply device (400).