CN216519738U - Three-way valve and gas water heater - Google Patents

Abstract

The utility model belongs to the technical field of gas water heaters, and particularly discloses a three-way valve and a gas water heater. The three-way valve comprises a valve body, a mandrel and a driving piece. The valve body is internally provided with a valve cavity, a main water inlet and a bypass water outlet which can be communicated with the valve cavity are arranged along the circumferential direction of the valve body, and one end of the valve body is provided with a main water outlet which can be communicated with the valve cavity. The mandrel penetrates through the valve cavity. The spindle is provided with a main valve core matched with the main water inlet and a bypass valve core matched with the bypass water outlet along the axial direction of the spindle. The driving piece drives the mandrel to move in the valve cavity along the closing direction or the opening direction. When the mandrel moves along the closing direction and the bypass valve core blocks the bypass water outlet, the gap between the main valve core and the main water outlet is gradually reduced. When the mandrel moves along the opening direction and the main valve core completely opens the main water outlet, the gap between the bypass valve core and the bypass water outlet is gradually increased. The gas water heater adopts the three-way valve, can keep the temperature of outlet water stable, and improve the temperature of exhaust gas, avoid producing the comdenstion water.

Description

Three-way valve and gas water heater

Technical Field

The utility model belongs to the technical field of gas water heaters, and particularly relates to a three-way valve and a gas water heater.

Background

During the use process of the gas water heater, the water flow of the main water pipeline and the bypass water pipeline needs to be adjusted in real time according to the size of the heat load of the water heater and the requirements of users.

On the premise of different heat loads and different water outlet temperatures of the gas water heater, the temperature of the straight pipe in the heat exchanger is increased by adjusting the flow of the bypass water pipeline, so that the temperature rise and the generation amount of condensed water in the gas water heater after water cut are reduced. Meanwhile, when the flow of the main water pipeline of the gas water heater is overlarge, even if the gas water heater uses the maximum heating power, the temperature of the outlet water cannot reach the set temperature of a user, and at the moment, the flow of the main water pipeline is reduced to improve the temperature of the outlet water, so that the temperature of the outlet water set by the user is reached.

At present, the flow regulation of a bypass water pipeline and a main water pipeline needs to be independently regulated by using water proportional valves respectively, the structure is complex, a large installation space is needed, and the cost is high. Some three-way valves can only control the bypass water line and the main water line to have opposite open and close states, and the adjustment requirement is difficult to meet.

SUMMERY OF THE UTILITY MODEL

One of the technical problems to be solved by the present invention is to provide a three-way valve, which effectively simplifies the structure of the three-way valve, saves the installation space, and maintains a stable outlet water temperature.

The second technical problem to be solved by the utility model is to provide a gas water heater, which effectively simplifies the structure of a three-way valve, saves the installation space and keeps stable outlet water temperature.

The first technical problem is solved by the following technical scheme:

a three-way valve comprising:

the water-saving valve comprises a valve body, a water inlet, a water outlet, a main water outlet and a bypass water outlet, wherein the valve body is internally provided with a valve cavity, the valve body is provided with a main water inlet and a bypass water outlet which can be communicated with the valve cavity along the circumferential direction of the valve body, and one end of the valve body is provided with a main water outlet which can be communicated with the valve cavity;

the mandrel is arranged in the valve cavity in a penetrating manner; the spindle is provided with a main valve core matched with the main water inlet and a bypass valve core matched with the bypass water outlet along the axial direction of the spindle; and

a driver configured to drive the mandrel to move in a closing direction or an opening direction within the valve cavity;

when the mandrel moves along the closing direction and the bypass valve core blocks the bypass water outlet, the gap between the main valve core and the main water outlet is gradually reduced; when the core shaft moves along the opening direction and the main valve core completely opens the main water outlet, the gap between the bypass valve core and the bypass water outlet is gradually increased.

Compared with the background art, the three-way valve has the beneficial effects that:

when the water pressure is too high, the mandrel moves along the closing direction, so that the bypass valve core blocks the bypass water outlet, the gap between the main valve core and the main water outlet is gradually reduced, namely the opening degree of the main water outlet is reduced, the flow of the main water outlet is reduced, the water outlet temperature is increased under the same heating power, and the stability of the water outlet temperature is favorably kept. When the heat load is smaller, the mandrel moves along the opening direction, the opening degree of the main water outlet is completely opened, the gap between the bypass valve core and the bypass water outlet is gradually increased, namely the opening degree of the bypass water outlet is increased, the flow of the bypass water outlet is increased, and the flow of the main water outlet is reduced, so that the water temperature in the heat exchanger in the gas water heater is increased, the smoke exhaust temperature is increased, and the generation of condensed water is avoided. Meanwhile, the water temperature rise in the hot air water heater after water supply is stopped can be reduced, and the stability of the outlet water temperature is kept.

In one embodiment, the bypass valve core comprises a bypass valve core main body, and when the main valve core adjusts the opening degree of the main water outlet, the bypass valve core main body blocks the bypass water outlet; one end of the bypass valve core main body is provided with a first adjusting surface, and a gap between the first adjusting surface and the bypass water outlet is gradually enlarged along the opening direction.

In one embodiment, the first adjustment surface is arranged inclined inwardly in the closing direction.

In one embodiment, the main valve element has a second adjusting surface, the main water outlet is correspondingly provided with a matching surface, and a gap between the second adjusting surface and the matching surface is gradually reduced along the closing direction.

In one embodiment, the second adjustment surface is arranged inclined inwardly in the closing direction.

In one embodiment, the three-way valve further comprises:

the fixed seat is arranged in the valve cavity; the fixing seat comprises a first shaft and a second shaft which are connected, a threaded hole is formed in the first shaft, a through hole is formed in the second shaft, and the threaded hole and the through hole are coaxially arranged; one end of the mandrel sequentially penetrates through the through hole and the threaded hole and then is connected with the driving piece; the mandrel is in threaded connection with the threaded hole.

In one embodiment, a sealing member is arranged between the first shaft and the inner wall of the valve cavity and between the through hole and the mandrel.

In one embodiment, the valve cavity comprises a first cavity and a second cavity which form a step structure, wherein the inner diameter of the first cavity is larger than that of the second cavity; the first shaft is clamped in the first cavity, and the second shaft extends towards the second cavity.

In one embodiment, a guide shaft section extends from the end of the spindle close to the main water outlet, a guide hole is correspondingly formed in the main water outlet, and the guide shaft section is slidably arranged in the guide hole in a penetrating manner.

The second technical problem is solved by the following technical solutions:

a gas water heater comprises the three-way valve.

Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:

this gas heater is through adopting foretell three-way valve, and when water pressure was too big, the dabber removed along closed direction for bypass case shutoff bypass water outlet, and the clearance of main valve core and main water outlet diminishes gradually, and the aperture of main delivery port diminishes promptly, makes the flow of main water outlet diminish, has increased leaving water temperature under the same heating power, is favorable to leaving water temperature to keep stable. When the heat load is smaller, the mandrel moves along the opening direction, the opening degree of the main water outlet is completely opened, the gap between the bypass valve core and the bypass water outlet is gradually increased, namely the opening degree of the bypass water outlet is increased, the flow of the bypass water outlet is increased, and the flow of the main water outlet is reduced, so that the water temperature in the heat exchanger in the gas water heater is increased, the smoke exhaust temperature is increased, and the generation of condensed water is avoided. Meanwhile, the water temperature rise in the hot air water heater after water supply is stopped can be reduced, and the stability of the outlet water temperature is kept.

Drawings

FIG. 1 is a schematic diagram of a three-way valve with the mandrel moving in a closing direction;

FIG. 2 is a schematic structural view of a three-way valve with the mandrel moving in an opening direction;

FIG. 3 is a schematic view of an assembly structure of the valve body and the fixing plate;

FIG. 4 is a schematic structural view of the mandrel;

fig. 5 is a partial enlarged view of a portion a in fig. 4.

Description of reference numerals:

1. a valve body; 11. a valve cavity; 111. a first chamber; 112. a second chamber; 12. a total water inlet; 13. a bypass water outlet; 14. a main water outlet; 141. a mating surface; 142. a guide hole;

2. a mandrel; 21. a main valve element; 211. a second conditioning surface; 22. a bypass spool; 221. a bypass spool body; 222. a first adjusting surface; 23. a guide shaft section; 24. a sealing groove;

3. a drive member;

4. a fixed seat; 41. a first shaft; 42. a second shaft;

5. a fixing plate; 6. a seal member; 7. and (4) bolts.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present embodiment discloses a hot gas water heater having a heat exchanger, a main water line and a bypass water line. An external water source can respectively enter the main water pipeline and the bypass water pipeline through the main water pipeline, and water in the main water pipeline is heated by the heat exchanger and then mixed with water in the bypass water pipeline to flow out.

In order to keep the outlet water temperature stable, avoid the condensate water generated on the fins of the heat exchanger and reduce the water cut-off temperature rise, two water proportional valves are needed to respectively adjust the flow of the bypass water pipeline and the main water pipeline, so that the adjusting valve and the matched control element are more, the structure is complex, a larger installation space is needed, and the cost is higher.

To solve the above problem, as shown in fig. 1 and 2, the present embodiment further discloses a three-way valve, which is used in the gas water heater to control the water flow into the main water pipeline and the bypass pipeline simultaneously through one three-way valve.

Specifically, the three-way valve includes a valve body 1, a spindle 2, and a driver 3. The valve body 1 is internally provided with a valve cavity 11, the valve body 1 is provided with a main water inlet 12 and a bypass water outlet 13 which can be communicated with the valve cavity 11 along the circumferential direction of the valve body, and one end of the valve body 1 is provided with a main water outlet 14 which can be communicated with the valve cavity 11. The mandrel 2 is arranged in the valve cavity 11 in a penetrating mode. The spindle 2 is provided with a main valve cartridge 21 cooperating with the main water inlet 12 and a bypass valve cartridge 22 cooperating with the bypass water outlet 13 in its axial direction. The driver 3 drives the mandrel 2 in a closing direction or an opening direction within the valve chamber 11.

When the spindle 2 is moved in the closing direction, the bypass valve element 22 first blocks the bypass water outlet 13, and the gap between the main valve element 21 and the main water outlet 14 gradually decreases. When the stem 2 moves in the opening direction, the main valve element 21 fully opens the main water outlet 14, and then the clearance between the bypass valve element 22 and the bypass water outlet 13 gradually increases.

As shown in fig. 1, when the water pressure is too high, the spindle 2 moves in the closing direction, so that the bypass valve core 22 blocks the bypass water outlet 13, the gap between the main valve core 21 and the main water outlet 14 gradually decreases, that is, the opening degree of the main water outlet 14 decreases, so that the flow rate of the main water outlet 14 decreases, the outlet water temperature is increased under the same heating power, and the outlet water temperature is kept stable.

As shown in fig. 2, when the heat load is small, the mandrel 2 moves in the opening direction, the opening degree of the main water outlet 14 is fully opened, the gap between the bypass valve core 22 and the bypass water outlet 13 gradually increases, that is, the opening degree of the bypass water outlet 13 increases, the flow rate of the bypass water outlet 13 is increased, and the flow rate of the main water outlet 14 is reduced, so that the temperature of water in the heat exchanger in the gas water heater is increased, the temperature of exhaust smoke is increased, and the generation of condensed water is avoided. Meanwhile, the water temperature rise in the gas water heater after water supply is stopped can be reduced, and the stable water outlet temperature can be kept.

As shown in fig. 3, the valve body 1 of the present embodiment has a substantially cylindrical structure with both ends open in the axial direction, and one end in the axial direction of the valve body 1 is a main water pipe having a main water outlet 14 therein that can communicate with the valve chamber 11. The valve body 1 is circumferentially provided with a main water pipeline and a bypass pipeline, and the main water pipeline and the bypass pipeline are respectively provided with a main water inlet 12 and a bypass water outlet 13.

It should be noted that the main water line and the bypass water line are distributed in a staggered manner along the axial direction of the valve body 1, so that the main water inlet 12 and the bypass water outlet 13 are arranged in a staggered manner along the axial direction of the valve body 1. The interference between the main water pipeline and the bypass pipeline can be avoided through the staggered distribution mode, and the pipeline arrangement of the valve body 1 is facilitated.

As shown in fig. 3 and 4, the main valve element 21 has a second adjusting surface 211, the main water outlet 14 has a mating surface 141, and a gap between the second adjusting surface 211 and the mating surface 141 is gradually reduced along the closing direction. Specifically, the first regulation surface 222 is disposed obliquely inward in the closing direction.

As shown in fig. 5, the upper end of the main valve element 21 is formed as a conical surface of a conical circular truncated cone, and the second adjustment surface 211 is a conical surface of a conical circular truncated cone. The mating surface 141 of the main water outlet 14 can mate with the second regulation surface 211. When the mandrel 2 moves in the closing direction, the gap between the second regulation surface 211 and the mating surface 141 gradually becomes smaller, so that the opening degree of the main water outlet 14 becomes smaller and the flow rate of the main water line decreases. When the mandrel 2 moves in the opening direction, the gap between the second regulation surface 211 and the mating surface 141 gradually becomes larger, so that the opening degree of the main water outlet 14 becomes larger and the flow rate of the main water line increases.

As shown in fig. 3 and 4, the bypass valve core 22 includes a main body of the bypass valve core 22, one end of the main body of the bypass valve core 22 is provided with a first adjusting surface 222, and a gap between the first adjusting surface 222 and the bypass water outlet 13 is gradually increased in the opening direction.

The second regulation surface 211 of the present embodiment is provided obliquely inward in the closing direction. The upper end of the bypass valve core main body 221 is also formed into a conical frustum, and the first adjusting surface 222 is a conical surface of the conical frustum. When the main valve element 21 adjusts the opening degree of the main water outlet 14, the bypass valve element main body 221 blocks the bypass water outlet 13, so that water in the valve body 1 is prevented from entering a bypass pipeline when the water pressure is too high. The main valve core 21 moves in the closing direction, so that the opening degree of the main water outlet 14 is reduced, the flow of the main water pipeline is reduced, the heating power is matched, and the outlet water temperature is kept constant.

As shown in fig. 3 and 4, a guiding shaft section 23 extends from an end of the mandrel 2 close to the main water outlet 14, a guiding hole 142 is correspondingly formed in the main water outlet 14, and the guiding shaft section 23 is slidably inserted into the guiding hole 142. The guide shaft section 23 improves the stability of the movement process of the mandrel 2, can avoid the mandrel 2 from shifting or shaking, and is favorable for improving the flow regulation precision and accuracy of the three-way valve.

It should be noted that, during the process of moving the mandrel 2 in the closing direction and the opening direction, the guide shaft section 23 is always in contact with the guide hole 142, so as to further improve the stability of the mandrel 2.

As shown in fig. 1 and 2, the three-way valve further includes a fixing seat 4, and the fixing seat 4 is disposed in the valve cavity 11. The fixing seat 4 comprises a first shaft 41 and a second shaft 42 which are connected, a threaded hole is formed in the first shaft 41, a through hole is formed in the second shaft 42, and the threaded hole and the through hole are coaxially arranged. One end of the mandrel 2 sequentially passes through the through hole and the threaded hole and then is connected with the driving piece 3. The mandrel 2 is in threaded connection with the threaded hole.

The driving part 3 of the embodiment is a stepping motor, and has the characteristics of high control precision and stable operation. The flow of the main water outlet 14 and the bypass water outlet 13 can be controlled simultaneously by one stepping motor, so that the cost is saved. Of course, the driving member 3 may be another type of motor, and only needs to drive the spindle 2 to rotate.

For example, the first shaft 41 of the fixed seat 4 and the mandrel 2 may be connected by a screw, or may be driven by a worm gear. When the driving member 3 rotates the spindle 2 in the forward or reverse direction, the spindle 2 moves in the closing or opening direction, thereby adjusting the flow rates of the main water outlet 14 and the bypass water outlet 13.

As shown in fig. 1 to 3, the valve chamber 11 includes a first chamber 111 and a second chamber 112 forming a stepped structure, and an inner diameter of the first chamber 111 is larger than an inner diameter of the second chamber 112. The first shaft 41 is engaged in the first cavity 111, and the second shaft 42 extends toward the second cavity 112. The ladder face that first chamber 111 and second chamber 112 formed has formed axial spacingly to first axle 41 for first axle 41 can the joint installation with first chamber 111 in, realized the stable installation of fixing base 4.

Further, the three-way valve further comprises a fixing plate 5, and the fixing plate 5 is covered on the opening end of the first cavity 111 and is fixedly connected with the valve body 1 through a bolt 7. The fixed plate 5 and the stepped surface in the valve cavity 11 jointly realize the axial positioning of the first shaft 41, and the stability of the fixed seat 4 is improved.

Specifically, the fixing plate 5 is provided with a through hole, and the through hole is coaxially arranged with the threaded hole in a penetrating manner, so that the core shaft 2 sequentially penetrates through the through hole, the threaded hole and the through hole and then penetrates out of the valve body 1, and is in transmission connection with the driving piece 3.

In addition, the driving member 3 is fixedly mounted on the fixing plate 5 by fasteners such as screws, so that the mechanism of the three-way valve is more compact, and the mounting space of the three-way valve is further reduced.

It is noted that seals 6 are provided between the first shaft 41 and the inner wall of the valve chamber 11 and between the through hole and the spindle 2. Improved valve body 1's sealed water-proof effects through sealing member 6, avoided taking place to leak between fixing base 4 and dabber 2 and fixing base 4 and the valve body 1, avoided water to get into driving piece 3 simultaneously in, improved the sealing performance of three-way valve, be favorable to protecting driving piece 3.

The sealing element 6 of the present embodiment is a sealing ring, and as shown in fig. 4, a sealing groove 24 is formed on the mandrel 2, and the sealing ring is sleeved in the sealing groove 24. Two seal grooves 24 arranged at intervals are formed in the mandrel 2, so that double sealing is realized, and the waterproof sealing effect between the mandrel 2 and the fixed seat 4 is enhanced.

Similarly, a sealing groove 24 is formed in the periphery of the first shaft 41, and a sealing ring is sleeved in the sealing groove 24 to realize waterproof sealing between the fixing seat 4 and the valve body 1. It is understood that the number of the sealing members 6 between the fixing seat 4 and the mandrel 2 and between the fixing seat 4 and the valve body 1 may be one, two or more than three, and is not limited in particular.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The detailed description of the embodiments above only expresses several embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A three-way valve, comprising:

the water-saving valve comprises a valve body (1), wherein a valve cavity (11) is formed in the valve body (1), a main water inlet (12) and a bypass water outlet (13) which can be communicated with the valve cavity (11) are formed in the valve body (1) along the circumferential direction of the valve body (1), and a main water outlet (14) which can be communicated with the valve cavity (11) is formed in one end of the valve body (1);

the mandrel (2) is arranged in the valve cavity (11) in a penetrating mode, and a main valve core (21) matched with the main water inlet (12) and a bypass valve core (22) matched with the bypass water outlet (13) are arranged on the mandrel (2) along the axial direction of the mandrel; and

a driver (3), the driver (3) being configured to drive the spindle (2) to move in a closing direction or an opening direction within the valve cavity (11);

when the mandrel (2) moves along the closing direction and the bypass valve core (22) blocks the bypass water outlet (13), the clearance between the main valve core (21) and the main water outlet (14) is gradually reduced; when the spindle (2) moves along the opening direction and the main valve core (21) completely opens the main water outlet (14), the gap between the bypass valve core (22) and the bypass water outlet (13) is gradually increased.

2. A three-way valve according to claim 1, characterized in that the bypass spool (22) comprises a bypass spool body (221), the bypass spool body (221) blocking the bypass water outlet (13) when the main spool (21) adjusts the opening degree of the main water outlet (14); one end of the bypass valve core main body (221) is provided with a first adjusting surface (222), and a gap between the first adjusting surface (222) and the bypass water outlet (13) is gradually enlarged along the opening direction.

3. A three-way valve according to claim 2, characterized in that the first adjusting surface (222) is arranged obliquely inwards in the closing direction.

4. A three-way valve according to claim 1, characterized in that the main valve element (21) has a second adjusting surface (211), and the main water outlet (14) has a mating surface (141) correspondingly arranged thereon, and the gap between the second adjusting surface (211) and the mating surface (141) is gradually reduced in the closing direction.

5. A three-way valve according to claim 4, characterized in that the second regulation surface (211) is arranged obliquely inwards in the closing direction.

6. A three-way valve according to claim 1, characterized in that it further comprises:

the fixed seat (4) is arranged in the valve cavity (11); the fixing seat (4) comprises a first shaft (41) and a second shaft (42) which are connected, a threaded hole is formed in the first shaft (41), a through hole is formed in the second shaft (42), and the threaded hole and the through hole are coaxially arranged; one end of the mandrel (2) sequentially penetrates through the through hole and the threaded hole and then is connected with the driving piece (3); the mandrel (2) is in threaded connection with the threaded hole.

7. A three-way valve according to claim 6, characterized in that seals (6) are arranged between the first shaft (41) and the inner wall of the valve chamber (11) and between the through hole and the spindle (2).

8. A three-way valve according to claim 6, characterized in that the valve chamber (11) comprises a first chamber (111) and a second chamber (112) forming a stepped structure, the inner diameter of the first chamber (111) being larger than the inner diameter of the second chamber (112); the first shaft (41) is clamped in the first cavity (111), and the second shaft (42) extends towards the second cavity (112).

9. A three-way valve according to any one of claims 1-8, characterized in that the end of the mandrel (2) close to the main water outlet (14) is extended with a guide shaft section (23), a guide hole (142) is correspondingly arranged in the main water outlet (14), and the guide shaft section (23) is slidably arranged in the guide hole (142).

10. A gas water heater comprising a three-way valve according to any one of claims 1 to 9.

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