Water heater constant temperature adjusting device capable of controlling temperature at rear end

Abstract

The utility model belongs to the technical field of valves, in particular to a water heater constant temperature adjusting device capable of controlling temperature at the rear end, which comprises a valve body and a controller, the valve body is provided with a hot water inlet communicated with a water outlet pipe of a water heater, a cold water inlet communicated with a cold water pipe and a water outlet, and the valve body is provided with a temperature sensor used for measuring the water temperature of the water outlet. An adjusting valve element driven by a power device to adjust the size of the hot water inlet and the size of the cold water inlet is arranged in the valve body, and the controller receives water temperature signals of the temperature sensor and controls the power device. According to the utility model, the water outlet temperature can be quickly and accurately adjusted in time, so that an accurate constant-temperature effect is achieved, and the phenomena of water cut-off temperature rise and sudden cold and hot of the outlet water are effectively avoided.

Description

Technical field:

[0001] The utility model belongs to the technical field of valves, in particular to a thermostatic regulating device for a water heater with rear-end temperature control. Background technology:

[0002] Current thermostats for water heaters on the market are controlled at the water inlet. This front-end temperature control method automatically regulates the amount of gas entering the combustion chamber based on the amount of cold water flowing in, achieving a constant temperature. However, this front-end temperature control approach has a drawback: if the water heater's back end experiences a water outage and temperature increase, or if water pressure fluctuations in the pipeline cause the water to fluctuate, the front-end temperature control method cannot quickly and efficiently adjust the back-end water outlet temperature. Consequently, the back-end water outlet still experiences this temperature increase and fluctuating phenomenon. Summary of the invention:

[0003] The purpose of the utility model is to provide a thermostatic regulating device for a water heater with rear-end temperature control, which can quickly and accurately adjust the outlet water temperature in a timely manner to achieve a precise constant temperature effect, and effectively avoid the phenomenon of water stoppage, temperature rise and fluctuating temperatures at the outlet water.

[0004] The utility model is achieved in this way:

[0005] A thermostatic regulating device for a water heater with rear-end temperature control comprises a valve body and a controller, wherein the valve body is provided with a hot water inlet connected to the water outlet pipe of the water heater, a cold water inlet connected to the cold water pipe, and a water outlet, the valve body is provided with a temperature sensor for measuring the water temperature at the water outlet, the valve body is provided with a regulating valve core driven by a power device to adjust the size of the hot water inlet and the cold water inlet, the controller receives the water temperature signal from the temperature sensor and controls the power device.

[0006] In the above-mentioned thermostatic adjustment device for a water heater with rear-end temperature control, the water outlet is arranged on the side of the hot water inlet away from the cold water inlet, and the regulating valve core is driven by a power device to slide in the valve body. The regulating valve core is hollow and has openings at both ends. One end of the regulating valve core adjusts the size of the hot water inlet and the other end adjusts the size of the cold water inlet.

[0007] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the cross-sectional areas of the hot water inlet and the cold water inlet are the same.

[0008] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, when the other end of the regulating valve core is in a critical state of opening the cold water inlet, one end of the regulating valve core blocks a portion of the hot water inlet.

[0009] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the valve body is a hollow cylinder, and the regulating valve core is a hollow cylinder adapted to the inner cavity of the valve body.

[0010] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, a connecting plate for connecting to a moving rod of a power device is provided in the regulating valve core. The connecting plate divides the regulating valve core into two left and right chambers. A through hole is provided on the connecting plate to connect the left and right chambers of the regulating valve core.

[0011] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the movable rod is arranged in the middle of the connecting plate, and a plurality of through holes are provided and are evenly distributed around the circumference of the connecting plate.

[0012] In the above-mentioned thermostatic adjustment device for a water heater with rear-end temperature control, the power device includes a rotating motor, and a plurality of convex teeth are provided at the end of the moving rod away from the connecting plate. The rotating shaft of the rotating motor is provided with an inner hole adapted to the moving rod, and the inner hole is provided with grooves whose number and position are adapted to the convex teeth. The rotating shaft of the rotating motor drives the moving rod to rotate through the convex teeth and the grooves. A fixing seat is fixedly installed in the valve body, and the moving rod is inserted into the fixing seat. The moving rod is provided with an external thread, and the fixing seat is provided with an internal thread adapted to the external thread.

[0013] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the fixing seat is fixed to the valve body via a pressing plate, the pressing plate is fixed to the valve body via screws, and the rotating motor is fixedly mounted on the pressing plate.

[0014] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, an O-ring sleeved on the fixing seat is provided between the fixing seat and the valve body.

[0015] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the power device may also be: the power device is a linear motor, and the linear motor drives the moving rod to move.

[0016] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the power device may also be: the power device is an electric push rod, and the telescopic rod of the electric push rod drives the moving rod to move.

[0017] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, a retaining spring and a limiting step are provided on the movable rod, the connecting plate is limited between the retaining spring and the limiting step, and a spring is provided in the valve body to move the connecting plate toward the retaining spring or the limiting step.

[0018] In the above-mentioned thermostatic adjustment device for a water heater with rear-end temperature control, the inner end of the movable rod extends into the valve body to connect the connecting plate, and the outer end extends out of the valve body. An annular boss is provided in the valve body, and the spring is a compression spring. One end of the compression spring contacts the annular boss, and the other end contacts the regulating valve core, and the elastic force of the compression spring causes the regulating valve core to move toward the outer end of the movable rod.

[0019] In the above-mentioned thermostatic regulating device for a water heater with rear-end temperature control, the valve body is provided with a hot water interface for connecting to the water outlet pipe of the water heater, a cold water interface for connecting to the cold water pipe, and a water outlet interface. The hot water interface is connected to the hot water inlet, the cold water interface is connected to the cold water inlet, and the water outlet interface is connected to the water outlet.

[0020] The outstanding advantages of the utility model compared with the prior art are:

[0021] 1. The utility model is installed on the outlet pipe of the water heater. By adding cold water to the water outlet of the water heater and mixing it, the outlet water temperature can be adjusted quickly and timely to meet the user's body temperature. At the same time, the temperature sensor detects the water temperature at the water outlet of the valve body, and the power device drives the regulating valve core to adjust the size of the hot water inlet and the cold water inlet, which can achieve precise constant temperature regulation. Therefore, when the water supply at the rear end of the water heater stops and the temperature rises, or when the pressure of the tap water in the pipeline fluctuates, causing the water to fluctuate between hot and cold, the utility model can quickly and accurately adjust the outlet water temperature in time to achieve a precise constant temperature effect, effectively avoiding the phenomenon of water supply stopping and heating, as well as the phenomenon of fluctuating between hot and cold.

[0022] 2. The regulating valve core of the utility model adjusts the size of the hot water inlet at one end and the cold water inlet at the other end. The sizes of the hot water inlet and the cold water inlet are adjusted in a linked manner through the regulating valve core, which is convenient for adjustment, has few parts and is low in cost.

[0023] 3. The cross-sectional areas of the hot water inlet and the cold water inlet of the present invention are the same, so that the outlet flow rate remains unchanged during the process of adjusting the water temperature of the outlet of the present invention;

[0024] 4. When the other end of the regulating valve core of the present invention is in a critical state of opening the cold water inlet, one end of the regulating valve core blocks a portion of the hot water inlet, so that when the present invention does not need to adjust the water temperature, the water flow rate can be adjusted according to the user's water consumption. Description of the drawings:

[0025] Figure 1 This is a three-dimensional Figure 1 ;

[0026] Figure 2 This is a three-dimensional Figure 2 ;

[0027] Figure 3 This is a cross-sectional view of the utility model without a rotating motor and with the hot water inlet at its maximum value;

[0028] Figure 4 This is a cross-sectional view of the utility model without a rotating motor and with the cold water inlet in a critical state;

[0029] Figure 5This is a cross-sectional view of the utility model without a rotating motor and with the cold water inlet in an open state;

[0030] Figure 6 It is a three-dimensional diagram of the regulating valve core of the present utility model.

[0031] Figure markings: 1. valve body; 2. hot water inlet; 3. cold water inlet; 4. water outlet; 5. temperature sensor; 6. regulating valve core; 7. moving rod; 8. connecting plate; 9. through hole; 10. rotating motor; 11. fixing seat; 12. external thread; 13. internal thread; 14. annular boss; 15. compression spring; 16. hot water interface; 17. cold water interface; 18. water outlet interface. Specific implementation method:

[0032] The present invention is further described below with reference to specific embodiments. Figure 1 —6:

[0033] A thermostatic regulating device for a water heater with rear-end temperature control comprises a valve body 1 and a controller. The valve body 1 is provided with a hot water inlet 2 connected to the water outlet pipe of the water heater, a cold water inlet 3 connected to the cold water pipe, and a water outlet 4. The valve body 1 is provided with a temperature sensor 5 for measuring the water temperature of the water outlet 4. The valve body 1 is provided with a regulating valve core 6 driven by a power device to adjust the size of the hot water inlet 2 and the cold water inlet 3. The controller receives the water temperature signal from the temperature sensor 5 and controls the power device.

[0034] The working principle of this utility model is as follows: Figure 1-6 As shown, the hot water from the water heater enters the valve body 1 through the water heater outlet pipe and the hot water inlet 2, and the cold water from the cold water pipe enters the valve body 1 through the cold water inlet 3. After mixing in the valve body 1, the water flows out through the outlet 4. The temperature sensor 5 detects the water temperature at the outlet 4 and transmits the water temperature signal to the controller. The controller controls the power device, thereby driving the regulating valve core 6 to adjust the size of the hot water inlet 2 and the cold water inlet 3. When the temperature sensor 5 detects that the water temperature at the outlet 4 is too high, the power device drives the regulating valve core 6 to reduce the hot water inlet 2 and increase the cold water inlet 3, thereby reducing the amount of hot water and increasing the amount of cold water; when the temperature sensor 5 detects that the water temperature at the outlet 4 is too low, the power device drives the regulating valve core 6 to increase the hot water inlet 2 and reduce the cold water inlet 3, thereby increasing the amount of hot water and decreasing the amount of cold water.

[0035] The utility model is installed on the outlet pipe of the water heater. By adding cold water to the water outlet of the water heater and mixing it, the outlet water temperature can be adjusted quickly and timely to meet the user's physical sense. At the same time, the temperature sensor 5 detects the water temperature at the water outlet 4 of the valve body 1, and the power device drives the regulating valve core 6 to adjust the size of the hot water inlet 2 and the cold water inlet 3, so as to achieve precise constant temperature regulation. Therefore, when the water supply at the rear end of the water heater stops and the temperature rises, or when the pressure of the tap water in the pipeline fluctuates, causing the water to fluctuate between hot and cold, the utility model can quickly and accurately adjust the outlet water temperature in time to achieve a precise constant temperature effect, effectively avoiding the phenomenon of water supply stopping and heating and fluctuating between hot and cold.

[0036] The regulating structure of the regulating valve core 6: Figure 1-6 As shown, the water outlet 4 is located on the side of the hot water inlet 2 away from the cold water inlet 3. The regulating valve core 6 is driven by a power device to slide within the valve body 1. The regulating valve core 6 is hollow and open at both ends. One end of the regulating valve core 6 adjusts the size of the hot water inlet 2, and the other end adjusts the size of the cold water inlet 3. After cold water from the cold water pipe enters the valve body 1 through the cold water inlet 3, it flows to the hot water side through the regulating valve core 6 and mixes with the hot water entering from the hot water inlet 2 before flowing out through the water outlet 4. This utility model uses a single regulating valve core 6 to adjust the size of the hot water inlet 2 and the cold water inlet 3, making adjustment easy, requiring fewer parts, and low cost.

[0037] In order to keep the flow rate of the water outlet 4 unchanged during the process of adjusting the water temperature of the water outlet 4 in the present invention, Figure 2 As shown, the cross-sectional areas of the hot water inlet 2 and the cold water inlet 3 are the same. In this embodiment, the hot water inlet 2 and the cold water inlet 3 are both long strips, and the length of the hot water inlet 2 is greater than that of the cold water inlet 3. Figure 5 As shown, when the regulating valve core 6 moves to the left, the reduced water inlet area of ​​the hot water inlet 2 is equal to the increased water inlet area of ​​the cold water inlet 3, that is, the reduced water inlet volume of the hot water inlet 2 is equal to the increased water inlet volume of the cold water inlet 3, and the total water inlet volume remains unchanged; when the regulating valve core 6 moves to the right, the increased water inlet area of ​​the hot water inlet 2 is equal to the reduced water inlet area of ​​the cold water inlet 3, that is, the increased water inlet volume of the hot water inlet 2 is equal to the reduced water inlet volume of the cold water inlet 3, and the total water inlet volume remains unchanged.

[0038] In order to adjust the water flow rate according to the user's water consumption when the utility model does not need to adjust the water temperature, Figure 4 As shown, when the other end of the regulating valve core 6 is in a critical state of opening the cold water inlet 3, one end of the regulating valve core 6 blocks a portion of the hot water inlet 2. When the regulating valve core 6 continues to move to the right, the cold water inlet 3 remains in a closed state, the water inlet area of ​​the hot water inlet 2 gradually increases, and the water flow rate of the water outlet 4 continues to increase until Figure 3In this embodiment, when one end of the regulating valve core 6 blocks half of the hot water inlet 2, the other end of the regulating valve core 6 is in a critical state of opening the cold water inlet 3.

[0039] Figure 4 The water inlet area S of the hot water inlet 2 is equal to Figure 5 The sum of the water inlet area S1 of the hot water inlet 2 and the water inlet area S2 of the cold water inlet 3, that is, S=S1+S2.

[0040] Shapes of the valve body 1 and the regulating valve core 6: the valve body 1 is a hollow cylinder, and the regulating valve core 6 is a hollow cylinder adapted to the inner cavity of the valve body 1 .

[0041] The connection structure between the regulating valve core 6 and the power unit: The regulating valve core 6 is equipped with a connecting plate 8 for connecting to the moving rod 7 of the power unit. The connecting plate 8 divides the regulating valve core 6 into two left and right chambers. The connecting plate 8 is provided with a through hole 9 that connects the left and right chambers of the regulating valve core 6. Cold water flowing in from the cold water inlet 3 flows through the through hole 9 to the hot water side and mixes with the hot water flowing in from the hot water inlet 2.

[0042] In order to achieve a better cold water passing effect, the moving rod 7 is arranged in the middle of the connecting plate 8 , and a plurality of through holes 9 are provided and evenly distributed around the circumference of the connecting plate 8 .

[0043] The power device structure includes a rotating motor 10. The end of the movable rod 7 away from the connecting plate 8 is provided with a plurality of protruding teeth. The rotating shaft of the rotating motor 10 is provided with an inner hole that matches the movable rod 7, and the inner hole is provided with grooves whose number and position match the protruding teeth. The rotating shaft of the rotating motor 10 drives the movable rod 7 to rotate via the protruding teeth and grooves. A fixed seat 11 is fixedly installed in the valve body 1. The movable rod 7 is inserted into the fixed seat 11. The movable rod 7 is provided with an external thread 12, and the fixed seat 11 is provided with an internal thread 13 that matches the external thread 12. The rotation of the rotating shaft of the rotating motor 10 drives the movable rod 7 to rotate. Because the movable rod 7 is threadedly connected to the fixed seat 11 via the external thread 12 and the internal thread 13, the movable rod 7 moves axially during rotation, driving the regulating valve core 6 to move. As the movable rod 7 rotates, it moves axially relative to the inner hole of the rotating shaft of the rotating motor 10.

[0044] Preferably, the rotary motor 10 is a servo motor.

[0045] The installation structure of the fixing seat 11 and the rotating motor 10: the fixing seat 11 is fixed to the valve body 1 through a pressure plate, the pressure plate is fixed to the valve body 1 through screws, and the rotating motor 10 is fixedly installed on the pressure plate.

[0046] In order to prevent liquid leakage between the fixing seat 11 and the valve body 1 , an O-ring sleeved on the fixing seat 11 is provided between the fixing seat 11 and the valve body 1 .

[0047] The specific installation structure of the connecting plate 8 and the moving rod 7: the moving rod 7 is provided with a retaining spring and a limiting step, the connecting plate 8 is limited between the retaining spring and the limiting step, and the valve body 1 is provided with a spring whose elastic force moves the connecting plate 8 toward the side of the retaining spring or the limiting step, so that there is no relative axial movement between the connecting plate 8 and the moving rod 7, so that the movement of the moving rod 7 driven by the power device can be fully reflected in the movement of the connecting plate 8.

[0048] In this embodiment, the function of the spring is to eliminate the loss of input pulses caused by the gap between parts when the servo motor rotates forward and then reverses when the servo motor drives the moving rod 7 to rotate.

[0049] The spring installation structure: The inner end of the movable rod 7 extends into the valve body 1 to connect to the connecting plate 8, and the outer end extends out of the valve body 1. The valve body 1 is provided with an annular boss 14. The spring is a compression spring 15. One end of the compression spring 15 contacts the annular boss 14, and the other end contacts the regulating valve core 6. The elastic force of the compression spring 15 causes the regulating valve core 6 to move toward the outer end of the movable rod 7. In this embodiment, the retaining spring is provided on the side of the limiting step close to the inner end of the movable rod 7. The elastic force of the compression spring 15 moves the connecting plate 8 toward the limiting step.

[0050] In order to facilitate the connection of the water heater outlet pipe, cold water pipe, and water supply pipe, the valve body 1 is provided with a hot water interface 16 for connecting the water heater outlet pipe, a cold water interface 17 for connecting the cold water pipe, and a water outlet interface 18. The hot water interface 16 is connected to the hot water inlet 2, the cold water interface 17 is connected to the cold water inlet 3, the water outlet interface 18 is connected to the water outlet 4, and the water supply pipe is connected to the water outlet interface 18.

[0051] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermostatic regulating device for a water heater with rear-end temperature control, characterized in that: The invention comprises a valve body (1) and a controller. The valve body (1) is provided with a hot water inlet (2) connected to a water outlet pipe of a water heater, a cold water inlet (3) connected to a cold water pipe, and a water outlet (4). The valve body (1) is provided with a temperature sensor (5) for measuring the water temperature at the water outlet (4). The valve body (1) is provided with a regulating valve core (6) driven by a power device to adjust the size of the hot water inlet (2) and the cold water inlet (3). The controller receives a water temperature signal from the temperature sensor (5) and controls the power device.

2. A thermostatic regulating device for a water heater with rear-end temperature control according to claim 1, characterized in that: The water outlet (4) is arranged on a side of the hot water inlet (2) away from the cold water inlet (3); the regulating valve core (6) is driven by a power device to slide in the valve body (1); the regulating valve core (6) is hollow and has openings at both ends; one end of the regulating valve core (6) regulates the size of the hot water inlet (2) and the other end regulates the size of the cold water inlet (3).

3. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 2, characterized in that: The cross-sectional areas of the hot water inlet (2) and the cold water inlet (3) are the same.

4. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 2, characterized in that: When the other end of the regulating valve core (6) is in a critical state of being about to open the cold water inlet (3), one end of the regulating valve core (6) blocks a portion of the hot water inlet (2).

5. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 2, characterized in that: A connecting plate (8) for connecting to a moving rod (7) of a power device is provided in the regulating valve core (6). The connecting plate (8) divides the regulating valve core (6) into two left and right chambers. A through hole (9) is provided on the connecting plate (8) for connecting the left and right chambers of the regulating valve core (6).

6. A thermostatic regulating device for a water heater with rear-end temperature control according to claim 5, characterized in that: The power device includes a rotating motor (10), and the end of the moving rod (7) away from the connecting plate (8) is provided with a plurality of convex teeth. The rotating shaft of the rotating motor (10) is provided with an inner hole that is compatible with the moving rod (7), and the inner hole is provided with grooves whose number and position are compatible with the convex teeth. The rotating shaft of the rotating motor (10) drives the moving rod (7) to rotate through the convex teeth and the grooves. A fixing seat (11) is fixedly installed in the valve body (1), and the moving rod (7) is inserted into the fixing seat (11). The moving rod (7) is provided with an external thread (12), and the fixing seat (11) is provided with an internal thread (13) that is compatible with the external thread (12).

7. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 5, characterized in that: The movable rod (7) is provided with a retaining spring and a limiting step, the connecting plate (8) is limited between the retaining spring and the limiting step, and the valve body (1) is provided with a spring for moving the connecting plate (8) toward the retaining spring or the limiting step.

8. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 7, characterized in that: The inner end of the movable rod (7) extends into the valve body (1) to connect the connecting plate (8), and the outer end extends out of the valve body (1). An annular boss (14) is provided in the valve body (1). The spring is a compression spring (15). One end of the compression spring (15) contacts the annular boss (14) and the other end contacts the regulating valve core (6). The elastic force of the compression spring (15) causes the regulating valve core (6) to move toward the outer end of the movable rod (7).

9. The thermostatic regulating device for a water heater with rear-end temperature control according to claim 1, characterized in that: The valve body (1) is provided with a hot water interface (16) for connecting to a water outlet pipe of a water heater, a cold water interface (17) for connecting to a cold water pipe, and a water outlet interface (18); the hot water interface (16) is connected to a hot water inlet (2), the cold water interface (17) is connected to a cold water inlet (3), and the water outlet interface (18) is connected to a water outlet (4).

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