CN211852889U

CN211852889U - Thermostatic valve and independent thermostatic control system

Info

Publication number: CN211852889U
Application number: CN201922125120.5U
Authority: CN
Inventors: 艾穗江; 蒲俊程; 邓海燕; 徐扬
Original assignee: Guangdong Macro Gas Appliance Co Ltd
Current assignee: Guangdong Macro Gas Appliance Co Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-11-03
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a thermostatic valve, include: the valve comprises a valve body, a valve core arranged on the valve body and a stepping motor for driving the valve core; the valve body comprises a cold water channel, a hot water channel, a cold water branch for communicating the cold water channel and the hot water channel, and a mixed water channel for the cold water branch and the hot water channel to merge, and the valve core is arranged on the cold water branch; its characterized in that still be equipped with the operator on the valve body, be equipped with on the mixed water passageway and be used for detecting the first temperature sensor of the leaving water temperature of mixed water passageway, the operator including control treater and with the operating panel that control treater connects, first temperature sensor with control treater connects, operating panel is last to be equipped with leaving water temperature and to set up the button, control treater is according to the signal of first temperature sensor and operating panel feedback, control step motor's drive valve core. The utility model also provides an independent constant temperature control system.

Description

Thermostatic valve and independent thermostatic control system

Technical Field

The utility model relates to a water heater technical field especially relates to a thermostatic valve and independent thermostatic control system.

Background

The existing thermostatic control system is arranged in the whole machine of the water heating equipment, for example, a patent with the patent number of CN110030726A and the name of invention patent of a thermostatic valve for an electric water heater, discloses a thermostatic valve for the electric water heater, which comprises a valve body, an upper shell and a computer board, motor and pendulum piece, the output shaft and the pendulum piece of motor are connected, in inlet tube and the outlet pipe were arranged respectively in to the both ends of pendulum piece, electric water heater includes the body, the thermostatic valve sets up on the body, still be equipped with electrical system on the body, the inlet end of body even has the inlet tube, the outlet end even has the outlet pipe, even there is a communicating pipe between inlet tube and the outlet pipe, be equipped with the temperature sensing probe on the outlet pipe, the delivery water temperature information that the temperature sensing probe gathered is carried to electrical system, the thermostatic valve includes the valve body, the epitheca, the computer board, motor and pendulum piece, the output shaft and the pendulum piece of motor are connected, inlet tube and outlet pipe are arranged respectively in. The thermostatic valve can only be matched with the current machine type or the same type machine type, cannot be used independently, and has a narrow application range.

Disclosure of Invention

To the problem that exists among the prior art, the utility model aims to provide a single use is with, but the independent control goes out the thermostatic valve of water temperature.

Another object of the present invention is to provide an independent thermostatic control system using the above thermostatic valve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a thermostatic valve comprising: the valve comprises a valve body, a valve core arranged on the valve body and a stepping motor for driving the valve core; the valve body comprises a cold water channel, a hot water channel, a cold water branch for communicating the cold water channel and the hot water channel, and a mixed water channel for the cold water branch and the hot water channel to merge, and the valve core is arranged on the cold water branch; the water mixing valve is characterized in that an operator is further arranged on the valve body, a first temperature sensor used for detecting the water outlet temperature of the water mixing channel is arranged on the water mixing channel, the operator comprises a control processor and an operation panel connected with the control processor, the first temperature sensor is connected with the control processor, a water outlet temperature setting button is arranged on the operation panel, and the control processor controls the valve core according to signals fed back by the first temperature sensor and the operation panel and drives the stepping motor.

As a further explanation of the above scheme, a second temperature sensor and a water flow sensor connected to the control processor are provided on the cold water passage.

As a further explanation of the above solution, a third temperature sensor connected to the control processor and used for detecting the temperature of the hot water is provided on the hot water passage.

As a further explanation of the above scheme, the first temperature sensor, the second temperature sensor, the third temperature sensor, and the water flow sensor are connected to the control processor through signal lines or connected through a wireless communication module.

As a further explanation of the above scheme, a display module for displaying the water temperature is provided on the operation panel.

As a further explanation of the above scheme, a power supply for supplying power to the operator and the stepping motor is provided on the valve body, and the power supply is an external power line or a built-in storage battery.

An independent temperature control system comprises a thermostatic valve and a water heater, and is characterized in that the thermostatic valve is the thermostatic valve as described in any one of the above items, a hot water channel of the thermostatic valve is connected with a water outlet pipe of the water heater, and a cold water channel of the thermostatic valve is connected with a water inlet pipe of the water heater.

As a further explanation of the above scheme, the water heater is a water heater, and a temperature sensor connected with the operator is arranged in the middle or at the top of an inner container of the water heater.

As a further explanation of the above scheme, the water heater is a gas water heater, a solar water heater or an air energy water heater.

The utility model has the advantages that:

the valve core can be used independently, is not required to be matched with a specific machine type and is suitable for use, the application range is wide, almost all places needing to realize constant temperature and mixed water can be applied, the valve core is arranged on a cold water channel, the service life of the valve core is prolonged, and the influence of high temperature on the valve core and a stepping motor is avoided.

And secondly, the stepping motor is controlled by adopting a mode of combining pre-adjustment and fine adjustment, so that the outlet water temperature of the valve body can stably, accurately and quickly reach the set temperature.

Drawings

Fig. 1 is a schematic view of the overall structure of the thermostatic valve provided by the present invention.

Fig. 2 is a schematic view of an internal structure of a thermostatic valve according to a first embodiment of the present invention.

Fig. 3 is a schematic view illustrating a control method of a thermostatic valve according to a first embodiment of the present invention.

Fig. 4 is a schematic view showing a control logic diagram of a thermostatic valve according to a first embodiment of the present invention.

Fig. 5 is a schematic view of an internal structure of a thermostatic valve according to a second embodiment of the present invention.

Fig. 6 is a schematic view illustrating the installation of the thermostatic valve and the water heater provided by the present invention.

Description of reference numerals:

1: power supply, 2: outer shell, 3: operator, 4: valve body, 5: a valve core, 6: stepping motor, 7: first temperature sensor, 8: second temperature sensor, 9: water flow sensor, 10: third temperature sensor, 100: thermostatic valve, 200: a water heater.

4-1: cold water passage, 4-2: hot water channel, 4-3: cold water branch, 4-4: a mixed water passage.

Detailed Description

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.

The following description will be further made in conjunction with the accompanying drawings of the specification, so that the technical solution and the advantages of the present invention are clearer and clearer. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.

Example one

As shown in fig. 1 to 4, a thermostatic valve includes: the valve comprises a valve body 4, a valve core 5 arranged in the valve body 4 and a stepping motor 6 for driving the valve core 5 to act; the valve body 4 comprises a cold water channel 4-1, a hot water channel 4-2, a cold water branch 4-3 for communicating the cold water channel and the hot water channel, and a mixed water channel 4-4 for the cold water branch 4-3 and the hot water channel 4-2 to merge, and the valve core 5 is arranged on the cold water branch 4-3; the device is characterized in that a first temperature sensor 7 used for detecting the outlet water temperature of the mixed water channel is arranged on the mixed water channel 4-4, a second temperature sensor 8 used for detecting the cold water temperature and a water flow sensor 9 used for detecting the total cold water flow are arranged on the cold water channel 4-1, a third temperature sensor 10 used for detecting the hot water temperature is arranged on the hot water channel 4-2, the operator 3 comprises a control processor and an operation panel connected with the control processor, the first temperature sensor 7, the second temperature sensor 8, the third sensor 10 and the water flow sensor 9 are respectively connected with the control processor, the control processor receives the signal feedback of the first temperature sensor, the second temperature sensor, the third temperature sensor and the water flow sensor and receives the set temperature set by a user through the operation panel And driving the stepping motor to control the flow of cold water flowing through the valve core.

The control of the stepping motor 6 comprises two steps of pre-adjustment and fine adjustment, wherein the valve core is adjusted to a step value that the water outlet temperature of the valve body is close to the set temperature through the pre-adjustment, and then the water outlet temperature of the valve body is adjusted to be equal to the step value of the set temperature through the fine adjustment.

Preferably, the pre-adjustment is adjusted in a sampling manner. Under different total cold water flow, cold water temperature and hot water temperature, recording the outlet water temperature of the mixed water channel corresponding to different positions of the valve core, and collecting the valve core position corresponding to each parameter, namely the step value. And the control processor receives feedback signals of the water flow sensor, the first temperature sensor, the second temperature sensor, the third temperature sensor and the set temperature, and controls the stepping motor to drive the valve core to reach step values corresponding to all parameters according to sampling data.

The fine adjustment mode is a temperature difference grade control mode or a PID control mode.

The temperature division grade is controlled to be less than or equal to 2 ℃ in the range of Tm-Tc, and the action precision of the stepping motor is 50 steps; if the temperature is less than 2 ℃ and less than Tm-Tc and less than or equal to 3 ℃, the action precision of the stepping motor is 100 steps; if the temperature is less than 3 ℃ and less than Tm-Tc and less than or equal to 6 ℃, the action precision of the stepping motor is 200 steps; if Tm-Tc is more than 6 ℃, the action precision of the stepping motor is 300 steps.

The PID control is as follows: the optimal action precision can be flexibly selected for adjustment according to different current environmental conditions, for example, when the temperature difference between Tm and Tc is 4 ℃, if the static temperature difference grade control mode is adopted, the stepping motor at least needs to sequentially go through the actions of three temperature intervals to achieve the adjustment of the target temperature, the PID control mode is adopted, the step precision can be intelligently optimized in advance, the stepping motor can achieve the adjustment of the target temperature only needs to be adjusted once to twice, and the adjustment time is short.

First temperature sensor 7 second temperature sensor 8 third temperature sensor 10 flow sensor 9 with control processor passes through the signal line connection or connects through wireless communication module, like modes such as bluetooth, wifi, power line carrier.

Further preferably, a display module for displaying the temperature of the water is provided on the operation panel. The thermostatic valve further comprises a shell 2, the valve body 4 is arranged in the shell 2, and the operation panel is arranged on the surface of the shell 2.

The valve body 4 is provided with a power supply 1 for supplying power to the operator 3 and the stepping motor 6, and the power supply 1 is an external power line or a built-in storage battery. The power supply 1 meets the power supply requirements of the operator 3 and the stepping motor 6, the operator is supplied with 5V direct current, and the stepping motor is supplied with 24V direct current.

Compared with the prior art, the thermostatic valve that this embodiment provided has following characteristics: 1) but the exclusive use need not supporting specific model and is suitable for, and application scope is wide, can use almost all places that need realize constant temperature and muddy water, and the case is established and has increased the life of case at the cold water passageway, avoids high temperature to case and step motor's influence. 2) The stepping motor is controlled by adopting a mode of combining pre-adjustment and fine adjustment, so that the outlet water temperature of the valve body can stably, accurately and quickly reach the set temperature.

Example two

As shown in fig. 5, a thermostatic valve comprises a valve body 4, a valve core 5 arranged in the valve body 4, and a stepping motor 6 for driving the valve core 5, wherein the valve body 4 comprises a cold water passage 4-1, a hot water passage 4-2, a cold water branch 4-3 for communicating the cold water passage 4-1 with the hot water passage 4-1, and a mixed water passage 4-4 for the cold water branch 4-3 and the hot water passage 4-2 to merge into, the valve core 5 is arranged on the cold water branch 4-1, and is characterized in that an operator 3 is arranged on the valve body, the operator 3 comprises a control processor and an operation panel connected with the control processor, a first temperature sensor 7 for detecting the temperature of the outlet water of the valve body is arranged on the mixed water passage 4-4, and the first temperature sensor 7 is connected with the control processor, the operation panel is provided with a water outlet temperature setting key, and the control processor controls the valve core to be driven by the stepping motor 6 according to signals fed back by the first temperature sensor 7 and the operation panel.

The control processor controls the stepping motor in a manner of temperature difference grade control or PID control.

The control mode of the temperature difference grades is as follows: when the Tm-Tc is less than or equal to 2 ℃, the action precision of the stepping motor is 50 steps; if the temperature is less than 2 ℃ and less than Tm-Tc and less than or equal to 3 ℃, the action precision of the stepping motor is 100 steps; if the temperature is less than 3 ℃ and less than Tm-Tc and less than or equal to 6 ℃, the action precision of the stepping motor is 200 steps; if Tm-Tc is more than 6 ℃, the action precision of the stepping motor is 300 steps.

The PID control mode is as follows: the optimal action precision can be flexibly selected for adjustment according to different current environmental conditions, for example, when the temperature difference between Tm and Tc is 4 ℃, if the static temperature difference grade control mode is adopted, the stepping motor at least needs to sequentially go through the actions of three temperature intervals to achieve the adjustment of the target temperature, the PID control method is adopted, the step precision can be intelligently optimized in advance, the stepping motor can achieve the adjustment of the set temperature only needs to be adjusted once to twice, and the adjustment time is short.

Compared with the first embodiment, the control program of the thermostatic valve provided by the embodiment is simple, the cost is low, the application range is wide, but the adjustment is relatively slow; the control method in the first embodiment is pre-adjustment and fine adjustment, and the control method of the stepping motor in this embodiment only includes fine adjustment.

EXAMPLE III

As shown in fig. 6, an independent temperature control system includes a thermostatic valve 100 and a water heater 200, and is characterized in that the thermostatic valve 100 is a thermostatic valve according to the first embodiment or the second embodiment, a hot water channel of the thermostatic valve 100 is connected to an outlet pipe of the water heater 200, and a cold water channel of the thermostatic valve 100 is connected to an inlet pipe of the water heater 200.

The factory setting of the thermostatic valve 100 is that the valve core 5 is in a completely closed state, so as to ensure that the water heater cannot be shunted when being filled with water, and the water heater is completely filled with water.

Preferably, the water heater 200 is an electric water heater, and a temperature sensor connected with the operator is arranged in the middle or at the top of the inner container of the electric water heater. The temperature sensor is used for detecting the water outlet temperature of the electric water heater, and the temperature sensor can also be arranged on a water outlet pipe of the electric water heater.

Preferably, the water heater 200 is a gas water heater, a solar water heater, or an air energy water heater.

Further preferably, the valve core is in a closed state in 3-9 seconds from the beginning of water consumption, and the control processor controls the stepping motor to drive the valve core in 3-9 seconds after water consumption. Because of the particularity of the water storage water heater, the water temperature rises gradually in the heating process, the volume of hot water expands, the water outlet valve is not opened at the moment, the hot water can expand to enter the water inlet pipe of the water heater, if the valve is opened for water, hot water mixing hot water can be generated inevitably, and the mixed water is too high in temperature, so that scalding accidents occur. Therefore, the hot water can be discharged from the section of the water inlet pipe without mixing the hot water. The existing program is set, the valve core does not act 6 seconds after the water is boiled, and the purpose is to discharge the hot water at the section so as to read the real inlet water temperature and realize the pre-regulation. However, according to the test, the real water inlet temperature time detected by the probe from water supply to water inlet temperature under different water inlet flow rates is different, so that the '6 seconds' can be changed into a changeable numerical value. For example, when the water flow is 3L/min, the water flow can be set to be 9 seconds, when the water flow is 6L/min, the water flow can be set to be 6 seconds, when the water flow is 9L/min, the water flow can be set to be 3 seconds, and the like, different waiting times are set according to different water flows, and the constant temperature effect which is stable, accurate and quick is achieved.

Compared with the prior art, the independent constant temperature system provided by the embodiment has all the beneficial effects of the first embodiment and the second embodiment. The specific structure of the water heater can be various structures which are known now or can be realized in the future, and the detailed description is omitted here.

It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to fall within the scope of the invention, which is defined by the claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.

Claims

1. A thermostatic valve comprising: the valve comprises a valve body, a valve core arranged on the valve body and a stepping motor for driving the valve core; the valve body comprises a cold water channel, a hot water channel, a cold water branch for communicating the cold water channel and the hot water channel, and a mixed water channel for the cold water branch and the hot water channel to merge, and the valve core is arranged on the cold water branch; the water mixing valve is characterized in that an operator is further arranged on the valve body, a first temperature sensor used for detecting the water outlet temperature of the water mixing channel is arranged on the water mixing channel, the operator comprises a control processor and an operation panel connected with the control processor, the first temperature sensor is connected with the control processor, a water outlet temperature setting button is arranged on the operation panel, and the control processor controls the valve core according to signals fed back by the first temperature sensor and the operation panel and drives the stepping motor.

2. A thermostatic valve according to claim 1 wherein a second temperature sensor and a water flow sensor are provided in said cold water passageway in connection with said control processor.

3. A thermostatic valve according to claim 2 wherein a third temperature sensor connected to the control processor for sensing the temperature of the hot water is provided in the hot water passage.

4. A thermostatic valve according to claim 3, wherein said first temperature sensor, said second temperature sensor, said third temperature sensor, said water flow sensor are connected to said control processor by signal lines or by wireless communication means.

5. A thermostatic valve according to claim 1, characterised in that a display module for displaying the temperature of the water is provided on the operating panel.

6. The thermostatic valve according to claim 1, wherein a power supply for supplying power to the operator and the stepping motor is provided on the valve body, and the power supply is an external power supply line or a built-in storage battery.

7. An independent thermostatic control system, comprising a thermostatic valve and a water heater, characterized in that the thermostatic valve is as claimed in any one of claims 1-6, the hot water channel of the thermostatic valve is connected with the water outlet pipe of the water heater, and the cold water channel of the thermostatic valve is connected with the water inlet pipe of the water heater.

8. The independent constant temperature control system according to claim 7, wherein the water heater is an electric water heater, and a temperature sensor connected with the operator is arranged in the middle or at the top of an inner container of the electric water heater.

9. An independent thermostatic control system according to claim 7, wherein the water heater is a gas water heater, a solar water heater or an air energy water heater.