阅读说明：本技术 用于集中式换热系统的控制方法和控制装置 (Control method and control device for centralized heat exchange system ) 是由 罗曙光 李红梅 李邺 于 2021-08-26 设计创作，主要内容包括：本申请公开了一种用于集中式换热系统的控制方法和控制装置。换热系统包括换热器、调节阀和总管阀门,换热器连接调节阀,调节阀连接总管阀门,控制方法包括：获取换热器出水口处的水温,根据水温与预设温度,得到调节阀的目标开度,若调节阀的目标开度在预设范围内,调节调节阀；若调节阀的目标开度超出预设范围,调节总管阀门。通过检测调节阀需要调节的目标开度,并根据目标开度所处的范围选择调节调节阀或总管阀门,防止调节阀的开度超出线性调节区,提高了调节精度和调节效果。(The application discloses a control method and a control device for a centralized heat exchange system. The heat exchange system comprises a heat exchanger, a regulating valve and a main pipe valve, the heat exchanger is connected with the regulating valve, the regulating valve is connected with the main pipe valve, and the control method comprises the following steps: acquiring the water temperature at a water outlet of the heat exchanger, acquiring the target opening degree of the regulating valve according to the water temperature and the preset temperature, and regulating the regulating valve if the target opening degree of the regulating valve is within a preset range; and if the target opening of the regulating valve exceeds the preset range, regulating the main pipe valve. By detecting the target opening degree of the regulating valve to be regulated and selecting and regulating the regulating valve or the main pipe valve according to the range of the target opening degree, the opening degree of the regulating valve is prevented from exceeding a linear regulating area, and the regulating precision and the regulating effect are improved.)

1. The control method for the centralized heat exchange system is characterized in that the heat exchange system comprises a heat exchanger, a regulating valve and a main valve, the heat exchanger is connected with the regulating valve, the regulating valve is connected with the main valve, and the control method comprises the following steps:

acquiring the water temperature at a water outlet of the heat exchanger;

obtaining a target opening degree of the regulating valve according to the water temperature and a preset temperature;

if the target opening degree of the regulating valve is within a preset range, regulating the regulating valve;

and if the target opening degree of the regulating valve exceeds a preset range, regulating the main pipe valve.

2. The control method for the centralized heat exchange system according to claim 1, wherein the step of obtaining the target opening degree of the regulating valve according to the water temperature and the preset temperature comprises:

and if the water temperature is higher than the preset temperature, increasing the current opening of the regulating valve to obtain the target opening.

3. The control method for the centralized heat exchange system according to claim 2, wherein the step of obtaining the target opening degree of the regulating valve according to the water temperature and the preset temperature further comprises:

and if the water temperature is lower than the preset temperature, reducing the current opening of the regulating valve to obtain the target opening.

4. The method as claimed in claim 1, wherein the step of adjusting the manifold valve if the target opening of the adjusting valve is out of a preset range comprises:

and if the target opening degree is smaller than a first threshold value, reducing the opening degree of the main pipe valve.

5. The method as claimed in claim 4, wherein the step of adjusting the manifold valve if the target opening of the adjusting valve is out of a preset range further comprises:

and if the target opening degree is larger than a second threshold value, increasing the opening degree of the main pipe valve.

6. A controlling means for centralized heat exchange system, characterized in that, heat exchange system includes heat exchanger, governing valve and main pipe valve, the heat exchanger is connected the governing valve, the governing valve is connected the main pipe valve, controlling means includes:

the temperature sensor is arranged at a water outlet of the heat exchanger and is used for acquiring the water temperature at the water outlet of the heat exchanger;

the controller is connected with the temperature sensor, and the controller is used for obtaining the target opening of the adjusting valve according to the water temperature and the preset temperature, adjusting the adjusting valve if the target opening of the adjusting valve is within a preset range, and adjusting the main pipe valve if the target opening of the adjusting valve exceeds the preset range.

7. The control device for the centralized heat exchange system as set forth in claim 6, wherein the controller increases the current opening degree of the regulating valve to obtain the target opening degree when the water temperature is higher than the preset temperature.

8. The control device for the centralized heat exchange system as set forth in claim 7, wherein the controller decreases the current opening degree of the regulating valve to obtain the target opening degree when the water temperature is less than the preset temperature.

9. The control apparatus for a centralized heat exchange system of claim 6, wherein the controller decreases the opening of the manifold valve when the target opening is less than a first threshold.

10. The control apparatus for a centralized heat exchange system of claim 9, wherein the controller increases the opening of the manifold valve when the target opening is greater than a second threshold.

Technical Field

The application relates to the technical field of heat exchange control, in particular to a control method and a control device for a centralized heat exchange system.

Background

The heat exchange station is a device connected with the user side in the centralized cooling/heating system and used for distributing, controlling and metering the cooling and heating quantities. In order to ensure the safe operation of the system, heat exchange equipment (such as a plate heat exchanger) is generally adopted for energy conversion, a pipe network of the heat exchanger connected with a cold and hot station is a primary side pipe network, and a pipe network connected with a user side is a secondary side pipe network. In the use process, the flow and the temperature of the secondary side of the heat exchanger can be changed due to the change of user load. In the adjusting method in the related art, the opening of the valve can be automatically adjusted according to the set temperature, but the adjusting method has the problems of low adjusting precision and poor adjusting effect.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the control method for the centralized heat exchange system can select different adjusting modes according to the detected temperature and the target opening information, so that the adjusting valve is always in a linear adjusting interval, and the adjusting precision and the adjusting effect are improved.

According to the control method for the centralized heat exchange system, the heat exchange system comprises a heat exchanger, a regulating valve and a main pipe valve, the heat exchanger is connected with the regulating valve, the regulating valve is connected with the main pipe valve, and the control method comprises the following steps: acquiring the water temperature at a water outlet of the heat exchanger; obtaining a target opening degree of the regulating valve according to the water temperature and a preset temperature; if the target opening degree of the regulating valve is within a preset range, regulating the regulating valve; and if the target opening degree of the regulating valve exceeds a preset range, regulating the main pipe valve.

The control method for the centralized heat exchange system according to the embodiment of the application has at least the following beneficial effects: by detecting the target opening degree of the regulating valve to be regulated and selecting and regulating the regulating valve or the main pipe valve according to the range of the target opening degree, the opening degree of the regulating valve is prevented from exceeding a linear regulating area, and the regulating precision and the regulating effect are improved.

According to some embodiments of the application, the step of obtaining the target opening degree of the regulating valve according to the water temperature and the preset temperature comprises: and if the water temperature is higher than the preset temperature, increasing the current opening of the regulating valve to obtain the target opening.

According to some embodiments of the present application, the step of obtaining the target opening degree of the regulating valve according to the water temperature and the preset temperature further includes: and if the water temperature is lower than the preset temperature, reducing the current opening of the regulating valve to obtain the target opening.

According to some embodiments of the present application, the adjusting the main pipe valve if the target opening degree of the adjusting valve exceeds a preset range includes: and if the target opening degree is smaller than a first threshold value, reducing the opening degree of the main pipe valve.

According to some embodiments of the present application, the step of adjusting the main pipe valve if the target opening degree of the adjusting valve exceeds a preset range further includes: and if the target opening degree is larger than a second threshold value, increasing the opening degree of the main pipe valve.

According to the controlling means for centralized heat exchange system of the second aspect embodiment of this application, heat exchange system includes heat exchanger, governing valve and main pipe valve, the heat exchanger is connected the governing valve, the governing valve is connected the main pipe valve, controlling means includes: the temperature sensor is arranged at a water outlet of the heat exchanger and is used for acquiring the water temperature at the water outlet of the heat exchanger; the controller is connected with the temperature sensor, and the controller is used for obtaining the target opening of the adjusting valve according to the water temperature and the preset temperature, adjusting the adjusting valve if the target opening of the adjusting valve is within a preset range, and adjusting the main pipe valve if the target opening of the adjusting valve exceeds the preset range.

According to some embodiments of the application, the controller increases the current opening degree of the regulating valve when the water temperature is greater than the preset temperature, to obtain the target opening degree.

According to some embodiments of the application, the controller reduces the current opening degree of the regulating valve when the water temperature is less than the preset temperature, to obtain the target opening degree.

According to some embodiments of the application, the controller decreases the opening degree of the manifold valve when the target opening degree is less than a first threshold value.

According to some embodiments of the application, the controller increases the opening degree of the manifold valve when the target opening degree is greater than a second threshold value.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a flow chart of a control method according to an embodiment of the present application;

FIG. 2 is a schematic view of a heat exchange system according to an embodiment of the present application;

FIG. 3 is a flow chart of a control method according to another embodiment of the present application;

FIG. 4 is a flowchart of a control method according to another embodiment of the present application;

FIG. 5 is a flowchart of a control method according to another embodiment of the present application;

fig. 6 is a flowchart of a control method according to another embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In some embodiments, the present application provides a control method for a centralized heat exchange system, where the heat exchange system includes a heat exchanger, a regulating valve, and a main valve, the heat exchanger is connected to the regulating valve, and the regulating valve is connected to the main valve. Referring to fig. 1, the control method includes:

s110, acquiring the water temperature at a water outlet of the heat exchanger;

s120, obtaining a target opening degree of the regulating valve according to the water temperature and the preset temperature;

s130, if the target opening of the regulating valve is within a preset range, regulating the regulating valve;

and S140, if the target opening of the regulating valve exceeds a preset range, regulating the main pipe valve.

A specific example, refer to fig. 2, which is a schematic diagram of a heat exchange system according to an embodiment of the present application. The cold and hot station is connected with a plurality of heat exchangers through a primary side pipe network, and the cold and hot station completes heat exchange with the heat exchangers through a water supply pipeline and a water return pipeline. DT in the figure_zA main pipe valve, one end of which is connected with a water return port of the cold and hot station, DT in the figure₁To DT_nThe water temperature of the water outlet of the heat exchanger can be changed by adjusting the opening degree of the main pipe valve and the adjusting valve to complete the function of controlling the flow of the corresponding heat exchanger. It can be understood that the main valve and the regulating valve of the present application are both disposed in the water return pipeline of the primary side pipe network, and in some other embodiments, the main valve and the regulating valve may also be disposed in the water supply pipeline of the primary side pipe network, and may also achieve the effect of regulating the flow of the heat exchanger.

The control method of the application is executed by a controller. The water outlets of the heat exchangers 1 to n are correspondingly provided with temperature sensors T1 to Tn to acquire the water temperature at the water outlets of the corresponding heat exchangers, and the mode of acquiring the water temperature by the temperature sensors can be that the sensors are arranged in the pipelines to directly measure the obtained water temperature data, or can be that the water temperature data are indirectly acquired by detecting the water temperature data from the outside of the pipelines, and the water temperature data can be set as required.

Different heat exchangers correspond different users, and the temperature is predetermine through the change to the user to the temperature of corresponding regulation heat exchanger delivery port department, thereby adjust indoor temperature. The controller compares the currently detected water temperature with the preset temperature of the user to obtain the target opening degree of the regulating valve, and when the opening degree of the regulating valve is the same as the target opening degree, the water temperature at the water outlet of the heat exchanger is the same as the preset temperature so as to meet the temperature regulating requirement of the user.

Because the pipe diameter of heat exchange station is great, and consider the cost problem, the flow control of heat exchange station still adopts the butterfly valve that regulating performance is relatively poor at present mostly, in order to guarantee the regulating performance and the regulation precision of butterfly valve to furthest, the aperture of governing valve should be located linear adjustment interval, for example, set up the linear adjustment interval of governing valve and be 20 to 80, when the aperture of governing valve was in this within range, the aperture of governing valve was the linear relation with the flow that flows through the governing valve. Therefore, when the calculated target opening degree is within the linear regulation interval of the regulating valve, the regulating valve can be directly regulated at the moment, so that the opening degree of the regulating valve is equal to the target opening degree. It can be understood that since each heat exchanger has a corresponding regulating valve and target opening degree, the regulating valves are directly regulated only when the target opening degrees of all the regulating valves are within a preset range.

When the target opening degree of the regulating valve exceeds a preset range, the main pipe valve needs to be regulated at the moment. When the flow through the valve is constant, the opening of the valve is different if the pressure difference across the valve is different. The opening degree of the main pipe valve is adjusted, so that the pressure difference between the water supply loop and the water return loop can be adjusted, the opening degree of the adjusting valve can be changed under the condition of certain flow by changing the pressure difference, the adjusting valve is located in a preset range, and even if the adjusting valve is located in a linear adjusting interval, the adjusting precision and the adjusting effect of the adjusting valve are improved. It will be appreciated that adjusting the header valve requires recalculating the target opening of the regulator valve until the adjustment is complete.

By detecting the target opening degree of the regulating valve to be regulated and selecting and regulating the regulating valve or the main pipe valve according to the range of the target opening degree, the opening degree of the regulating valve is prevented from exceeding a linear regulating area, and the regulating precision and the regulating effect are improved.

Some embodiments, referring to fig. 3, the step of obtaining the target opening of the regulating valve according to the water temperature and the preset temperature includes:

and S121, if the water temperature is higher than the preset temperature, increasing the current opening of the regulating valve to obtain the target opening.

Under the condition that the water temperature at the water outlet of the heat exchanger is higher than the preset temperature, the opening degree of the regulating valve needs to be increased so as to increase the flow passing through the primary side pipe network of the heat exchanger. The increasing mode can be that the opening degree of presetting the size is increased in proper order to real-time detection temperature, until the temperature equals to preset temperature.

Some embodiments, referring to fig. 4, the step of obtaining the target opening of the regulating valve according to the water temperature and the preset temperature further includes:

and S122, if the water temperature is lower than the preset temperature, reducing the current opening of the regulating valve to obtain the target opening.

Under the condition that the water temperature at the water outlet of the heat exchanger is lower than the preset temperature, the opening degree of the regulating valve needs to be reduced so as to reduce the flow passing through the primary side pipe network of the heat exchanger. The reduction mode can be that the aperture of predetermineeing the size is reduced for in proper order to real-time detection water temperature, until the temperature equals to predetermineeing the temperature.

In some embodiments, referring to fig. 5, if the target opening of the regulating valve is beyond a preset range, the step of regulating the main valve includes:

and S141, if the target opening degree is smaller than the first threshold value, reducing the opening degree of the main pipe valve.

For example, if the preset range is 20 to 80, the first threshold is 20, and in the process of adjusting the regulating valve, when it is detected that the target opening degree is smaller than 20, if the adjustment is continued, the adjustable performance of the regulating valve is affected, and the adjustment accuracy of the system is poor or unstable. Therefore, the opening degree of the main pipe valve is reduced to reduce the pressure difference in the primary side pipe network, and in order to keep the water temperature at the water outlet unchanged, the opening degree of the corresponding regulating valve needs to be larger, so that the opening degree of the regulating valve is in a preset range, and the regulating precision of the regulating valve is kept.

In some embodiments, referring to fig. 6, if the target opening of the regulating valve is beyond a preset range, the step of regulating the main valve further includes:

and S142, if the target opening degree is larger than a second threshold value, increasing the opening degree of the main pipe valve.

For example, if the preset range is 20 to 80, the second threshold is 80, and in the process of adjusting the regulating valve, when it is detected that the target opening degree is greater than 80, if the adjustment is continued, the adjustable performance of the regulating valve is affected, and the adjustment accuracy of the system is poor or unstable. Therefore, the opening degree of the main pipe valve is increased to increase the pressure difference in the primary side pipe network, and in order to keep the water temperature at the water outlet unchanged, the opening degree of the corresponding regulating valve needs to be smaller, so that the opening degree of the regulating valve is in a preset range, and the regulating precision of the regulating valve is kept.

Some embodiments, referring to fig. 2, the present application further provides a control device for a centralized heat exchange system, the heat exchange system includes a heat exchanger, a regulating valve and a main valve, the heat exchanger is connected to the regulating valve, the regulating valve is connected to the main valve, the control device includes: the temperature sensor is arranged at the water outlet of the heat exchanger and used for acquiring the water temperature at the water outlet of the heat exchanger; the controller is connected with the temperature sensor and used for obtaining the target opening degree of the regulating valve according to the water temperature and the preset temperature, if the target opening degree of the regulating valve is within the preset range, the regulating valve is regulated, and if the target opening degree of the regulating valve exceeds the preset range, the main pipe valve is regulated.

The controller obtains the water temperature at the water outlet through the temperature sensor to obtain the target opening of the regulating valve to be regulated, and selects and regulates the regulating valve or the main pipe valve according to the range of the target opening, so that the opening of the regulating valve is prevented from exceeding a linear regulating area, and the regulating precision and the regulating effect of the centralized heat exchange system are improved. The specific principle and the implementation mode thereof are the same as those of the control method for the centralized heat exchange system, and are not described in detail here.

In some embodiments, the controller increases the current opening of the regulating valve to obtain the target opening when the water temperature is higher than the preset temperature.

The controller needs to increase the opening of the regulating valve under the condition that the water temperature at the water outlet of the heat exchanger is detected to be higher than the preset temperature, so that the flow passing through the primary side pipe network of the heat exchanger is increased. The increasing mode can be that the opening degree of presetting the size is increased in proper order to real-time detection temperature, until the temperature equals to preset temperature.

In some embodiments, the controller decreases the current opening of the regulating valve to obtain the target opening when the water temperature is less than the preset temperature.

The controller needs to reduce the opening of the regulating valve under the condition that the water temperature at the water outlet of the heat exchanger is detected to be lower than the preset temperature, so that the flow passing through the primary side pipe network of the heat exchanger is reduced. The reduction mode can be that the aperture of predetermineeing the size is reduced for in proper order to real-time detection water temperature, until the temperature equals to predetermineeing the temperature.

In some embodiments, the controller decreases the opening of the manifold valve when the target opening is less than a first threshold. For example, if the preset range stored in the controller is 20 to 80, the first threshold is 20, and in the process of adjusting the regulating valve, when it is detected that the target opening degree is smaller than 20, if the adjustment is continued, the adjustable performance of the regulating valve is affected, and the adjustment accuracy of the system is poor or unstable. Therefore, the controller controls the opening of the main pipe valve to be reduced so as to reduce the pressure difference in the primary side pipe network, and the corresponding opening of the regulating valve must be larger in order to keep the water temperature at the water outlet unchanged, so that the opening of the regulating valve is in a preset range, and the regulating precision of the regulating valve is kept.

In some embodiments, the controller increases the opening degree of the manifold valve when the target opening degree is greater than a second threshold value. For example, if the preset range stored in the controller is 20 to 80, the second threshold is 80, and in the process of adjusting the regulating valve, when it is detected that the target opening is greater than 80, if the adjustment is continued, the adjustable performance of the regulating valve is affected, and the adjustment accuracy of the system is poor or unstable. Therefore, the controller controls the opening of the main pipe valve to increase the pressure difference in the primary side pipe network, and the corresponding opening of the regulating valve needs to be smaller to keep the water temperature at the water outlet unchanged, so that the opening of the regulating valve is in a preset range, and the regulating precision of the regulating valve is kept.

In the description of the present application, reference to the description of the terms "some embodiments," "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.