Constant-temperature water mixing valve of open type water heater

Abstract

The utility model discloses a constant-temperature water mixing valve of an open type water heater. The constant-temperature water mixing valve comprises a valve body (1), a temperature adjusting knob (2), a constant-temperature valve core (3), a shunt valve core (4) and a telescopic push rod (5), wherein the valve body (1) is provided with four water ports; a traditional three-way water way is innovatively improved into a four-way structure comprising a cold water inlet end (12), a cold water outlet end (13), a hot water inlet end (14) and a mixed water outlet end (15), wherein the hot water inlet end is directly communicated with the mixed water outlet end. The water dividing valve element (4) divides inlet water into an external water path communicated with the water heater and an internal water path directly communicated with the mixed water opening, and the flow proportion of the two paths is dynamically adjusted through displacement of the valve element. The constant-temperature valve element (3) automatically drives the shunt valve element (4) to move according to water temperature changes to achieve temperature adjustment, and meanwhile manual intervention can be achieved through the rotary knob (2) and the telescopic push rod (5). The constant-temperature water mixing valve solves the problem that a traditional constant-temperature water mixing valve cannot meet the constant-temperature requirement of an open type water heater.

Description

An open-type thermostatic mixing valve for water heaters Technical Field

[0001] This utility model relates to the field of thermostatic mixing valve technology, specifically an open thermostatic mixing valve suitable for open water heaters. It is particularly an improvement on existing closed thermostatic mixing valves, achieving optimization of the water circuit system and improvement of the thermostatic adjustment module. Background Technology

[0002] Existing thermostatic mixing valves are mostly closed structures, and their water circuit design is usually three-way, which cannot meet the needs of open-type water heaters. Therefore, this patent proposes an innovative solution. Summary of the Invention

[0003] The purpose of this utility model is to provide an open-type thermostatic mixing valve. By improving the water circuit system and the thermostatic control module, it solves the problems in the prior art. The main innovations are as follows:

[0004] An open-type thermostatic mixing valve for a water heater includes a valve body, a temperature control knob, a telescopic push rod disposed within the valve body, a water distribution valve core, and a thermostatic valve core.

[0005] The valve body improves the traditional closed thermostatic mixing valve from 3 water circuits to 4 circuits, namely cold water inlet, cold water outlet, hot water inlet and mixed water outlet. The hot water inlet and the mixed water outlet are connected to ensure that the outlet of the open water heater is not blocked.

[0006] In the aforementioned thermostatic mixing valve, the cold water outlet is connected to the cold water inlet of the water heater, and the hot water outlet of the water heater is connected to the hot water inlet. When cold water flows out of the cold water outlet, the corresponding hot water from the water heater will flow in from the hot water inlet, thus achieving hot water linkage.

[0007] The water distribution valve core improves upon the traditional closed thermostatic mixing valve's dual-inlet control valve core for hot and cold water by transforming it into an open water distribution valve core with one inlet and two outlets. One outlet is connected to the external water circuit of the water heater, while the other is directly connected to the internal water circuit of the mixing outlet. The flow ratio of the two outlets is dynamically adjusted by the displacement of the valve core. This design not only simplifies the structure but also allows it to stably cope with different water pressure environments.

[0008] In the aforementioned thermostatic mixing valve, when the water temperature of the open-type water heater rises, the thermostatic valve core expands due to heat, pushing the water distribution valve core towards the hot water inlet, thereby reducing the inflow of hot water and achieving automatic water temperature regulation.

[0009] In the aforementioned thermostatic mixing valve, when the water temperature of the open-type water heater decreases, the thermostatic valve core will contract upon cooling, pushing the water distribution valve core to move in the opposite direction to the hot water inlet, thereby increasing the inflow of hot water and achieving automatic water temperature regulation.

[0010] In the aforementioned thermostatic mixing valve, the forward and backward movement of the water distribution valve core can also be changed by manually adjusting the telescopic push rod with a knob, thereby achieving manual adjustment of the water temperature. Attached Figure Description

[0011] Figure 1 is an exploded view of the open-type thermostatic mixing valve for water heaters according to this utility model.

[0012] Figure 2 is a front view of the open-type thermostatic mixing valve for water heaters according to this utility model.

[0013] Figure 3 is a cross-sectional view of the valve body of the open-type thermostatic mixing valve for water heaters of this utility model.

[0014] Figure 4 is a structural diagram of the water distribution valve core of the open-type thermostatic mixing valve for water heaters according to this utility model.

[0015] Figure 5 is an internal cross-sectional view of the open-type thermostatic mixing valve for water heaters of this utility model.

[0016] Figure 6 is an external transparent view of the open-type thermostatic mixing valve for water heaters according to this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the scope of protection of the present invention.

[0018] As shown in Figure 1, the thermostatic mixing valve of this utility model includes:

[0019] The valve body (1) is provided with a cold water inlet (12), a cold water outlet (13), a hot water inlet (14) and a mixed water outlet (15), wherein the hot water inlet (14) and the mixed water outlet (15) are connected through an internal flow channel;

[0020] Temperature control knob (2) is located outside the valve body (1);

[0021] Thermostatic valve core (3), with built-in temperature sensing element (not shown in the figure);

[0022] The water distribution valve core (4) divides the internal water path of the valve body into an external water path and an internal water path. The external water path is connected to the cold water outlet (13), and the internal water path is connected to the mixed water outlet (15).

[0023] Telescopic push rod (5) connects temperature control knob (2) and water distribution valve core (4).

[0024] In practice, the cold water inlet (12) of the valve body (1) is connected to the external water supply network, the cold water outlet (13) is connected to the cold water inlet of the open water heater through a pipe, and the hot water outlet of the open water heater is connected to the hot water inlet (14) of the valve body (1).

[0025] During implementation, the work process includes:

[0026] Initial state: After external cold water enters through the cold water inlet (12), the water distribution valve core (4) divides it into:

[0027] First branch: via external waterway → cold water outlet (13) → open water heater heating → hot water inlet (14);

[0028] Second branch: flows directly to the mixed water outlet (15) via the internal water passage;

[0029] The two fluids achieve temperature mixing at the outlet of the mixed water (15).

[0030] Automatic temperature control stage:

[0031] When the hot water temperature rises, the thermostatic valve core (3) expands thermally and pushes the water distribution valve core (4) closer to the hot water inlet (14) to reduce the proportion of hot water flow.

[0032] When the hot water temperature is detected to be lower, the thermostatic valve core (3) shrinks and drives the water distribution valve core (4) away from the hot water inlet (14) to increase the proportion of hot water flow.

[0033] Manual temperature adjustment stage:

[0034] When the temperature control knob (2) is rotated counterclockwise, the telescopic push rod (5) retracts, driving the water distribution valve core (4) away from the hot water inlet (14) to increase the hot water output;

[0035] When the temperature control knob (2) is rotated clockwise, the telescopic push rod (5) extends, pushing the water distribution valve core (4) closer to the hot water inlet (14) to reduce the hot water output.

Claims

1. An open-type thermostatic mixing valve for a water heater, characterized in that, include: The valve body (1) is provided with independent cold water inlet (12), cold water outlet (13), hot water inlet (14) and mixed water outlet (15), wherein the hot water inlet (14) and the mixed water outlet (15) are connected through an internal flow channel; the thermostatic valve core (3) has a built-in temperature sensing element and is linked with the water distribution valve core (4); the water distribution valve core (4) is set inside the valve body (1) and divides the water inlet into an external water path that connects to the cold water outlet (13) and an internal water path that connects to the mixed water outlet (15); the telescopic push rod (5) is connected to the water distribution valve core (4); the temperature adjustment knob (2) is externally connected to the valve body (1) and drives the telescopic push rod (5).

2. The thermostatic mixing valve according to claim 1, characterized in that: The cold water outlet (13) is configured to connect to the cold water inlet of the open-type water heater, and the hot water inlet (14) is configured to connect to the hot water outlet of the open-type water heater.

3. The thermostatic mixing valve according to claim 1, characterized in that: The water distribution valve core (4) adjusts the flow distribution ratio between the external water circuit and the internal water circuit through axial displacement.

4. The thermostatic mixing valve according to claim 1, characterized in that: The thermostatic valve core (3) drives the water distribution valve core (4) to move through the thermal expansion and contraction effect. Specifically, when the water temperature rises, the water distribution valve core (4) is pushed to move towards the hot water inlet (14) to reduce the hot water flow; when the water temperature drops, the water distribution valve core (4) is driven to move away from the hot water inlet (14) to increase the hot water flow.

5. The thermostatic mixing valve according to claim 1, characterized in that: The temperature control knob (2) forcibly changes the axial position of the water distribution valve core (4) through the extension / retraction movement of the telescopic push rod (5).

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