CN215570804U

CN215570804U - Heat exchange station and hydraulic balance system

Info

Publication number: CN215570804U
Application number: CN202121640522.XU
Authority: CN
Inventors: 郁辉球; 麻剑锋; 沈天昱; 沈岑
Original assignee: Hang Zhou Zeta Technology Co Lts
Current assignee: Hang Zhou Zeta Technology Co Lts
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-01-18
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a heat exchange station and a hydraulic balance system, wherein the heat exchange station comprises at least one heat exchange unit, and each heat exchange unit comprises a heat exchanger, a primary side water supply pipe, a primary side water return pipe, a secondary side water supply pipe, a primary side temperature controller and a secondary side temperature controller; the primary side temperature controller is used for collecting a temperature signal corresponding to the primary side water return pipe and controlling the flow of fluid in the primary side water return pipe; the secondary side temperature controller is used for collecting temperature signals corresponding to the secondary side water supply pipe and controlling the flow speed of fluid in the secondary side water supply pipe. The primary side temperature controller controls the flow of the primary side fluid to ensure the temperature difference of the primary side supply return water, and the secondary side temperature controller controls the flow rate of the secondary side fluid to meet the energy utilization requirement of a user side, so that the utilization rate of heat energy can be improved, and the transmission and distribution loss is reduced.

Description

Heat exchange station and hydraulic balance system

Technical Field

The utility model relates to the field of heat exchange, in particular to a heat exchange station and a hydraulic balance system comprising the heat exchange station.

Background

The heat exchange station is provided with a primary side pipe network and a secondary side pipe network, the primary side pipe network is communicated with the energy station, the secondary side pipe network is communicated with the energy unit, and low-temperature cold water or high-temperature hot water conveyed by the energy station exchanges heat in the heat exchange station so as to supply cold or heat for the energy unit.

At present, the flow of the primary side is adjusted according to the deviation value of the outlet water temperature of the secondary side pipe network of the heat exchange station and the set temperature, and the problems of insufficient energy utilization and high transmission and distribution energy consumption exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heat exchange station and a hydraulic balance system comprising the same, aiming at the defects in the prior art, the heat exchange station controls the flow of fluid in a pipeline through the temperature corresponding to a primary side water return pipe so as to ensure the temperature difference of primary side water supply and return, improve the energy utilization rate and reduce the transmission and distribution energy consumption.

In order to solve the technical problem, the utility model is solved by the following technical scheme:

a heat exchange station comprises a heat exchange station water supply pipe, a heat exchange station water return pipe and at least one heat exchange unit, wherein the heat exchange unit is communicated with an external user pipe network;

each heat exchange unit comprises a heat exchanger, a primary side water supply pipe, a primary side water return pipe, a secondary side water supply pipe, a primary side temperature controller and a secondary side temperature controller;

the heat exchange station water supply pipe is communicated with the heat exchange station water return pipe sequentially through the primary side water supply pipe, the heat exchanger and the primary side water return pipe;

the secondary side water supply pipe is communicated with the secondary side water return pipe through the heat exchanger, and the secondary side water supply pipe and the secondary side water return pipe are both communicated with an external user pipe network;

the primary side temperature controller is used for collecting a temperature signal corresponding to the primary side water return pipe and controlling the flow of fluid in the primary side water return pipe;

the secondary side temperature controller is used for collecting temperature signals corresponding to the secondary side water supply pipe and controlling the flow speed of fluid in the secondary side water supply pipe.

As an embodiment, the primary side thermostat includes:

the first temperature sensor is arranged at the primary side water return pipe and used for detecting the outlet water temperature of the primary side;

a first regulating valve provided at the primary-side water supply pipe or the primary-side water return pipe;

and the first control unit is respectively in signal connection with the first temperature sensor and the first regulating valve and is used for controlling the opening degree of the valve of the first regulating valve according to the outlet water temperature on the primary side.

As an embodiment, the primary side thermostat further includes a second temperature sensor;

the second temperature sensor is arranged at the primary side water supply pipe, is used for detecting the temperature of the inlet water at the primary side and is in signal connection with the first control unit;

and the first control unit is used for controlling the opening degree of the valve of the first regulating valve according to the inlet water temperature and the outlet water temperature of the primary side.

As an embodiment, the secondary side thermostat includes:

the third temperature sensor is arranged at the secondary side water supply pipe and used for detecting the outlet water temperature of the secondary side;

and the second control unit is respectively connected with the third temperature sensor and an external user circulating water pump through signals and is used for controlling the user circulating water pump to work according to the outlet water temperature of the secondary side.

As an implementation manner, the secondary side temperature controller further includes a fourth temperature sensor;

the fourth temperature sensor is arranged at the secondary side water return pipe, is used for detecting the water inlet temperature of the secondary side and is in signal connection with the second control unit;

and the second control unit is used for controlling the working of the user circulating water pump according to the water inlet temperature and the water outlet temperature of the secondary side.

As an implementation mode, the system further comprises a master controller, wherein the master controller comprises a second regulating valve, a pressure sensor before the valve, a pressure sensor after the valve, a water supply pressure sensor and a third control unit;

the second regulating valve is arranged at a water return pipe of the heat exchange station, the pressure sensor before the valve is arranged at a water inlet of the second regulating valve, the pressure sensor after the valve is arranged at a water outlet of the second regulating valve, and the pressure sensor for water supply is arranged at a water supply pipe of the heat exchange station;

the third control unit is respectively connected with the second regulating valve, the pressure sensor before the valve, the pressure sensor after the valve and the water supply pressure sensor, is used for receiving the pressure sensor before the valve, the pressure sensor after the valve and the pressure signal collected by the water supply pressure sensor, and is also used for controlling the opening and closing degree of the valve of the second regulating valve.

As an implementation mode, the master controller further comprises a water supply temperature sensor and a water return temperature sensor;

the water supply temperature sensor is arranged at a water supply pipe of the heat exchange station, the water return temperature sensor is arranged at a water return pipe of the heat exchange station, and the water supply temperature sensor and the water return temperature sensor are connected with the third control unit in a signal mode.

As an implementable embodiment:

the master controller, the primary side temperature controller and the secondary side temperature controller are all connected with an external server through signals.

The utility model also provides a hydraulic balance control system which comprises the heat exchange station.

As an implementation mode, the system also comprises an energy station, a main water supply pipe and a main water return pipe, wherein the heat exchange station water supply pipe of each heat exchange station is communicated with the main water supply pipe, and the heat exchange station water return pipe is communicated with the main water return pipe;

the energy station comprises secondary circulating pump assemblies, and each secondary circulating pump assembly is communicated with the main water return pipe;

each secondary circulating pump assembly is connected with an external server through signals.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that:

the primary side temperature controller controls the flow of the primary side fluid to ensure the temperature difference of the primary side supply return water, and the secondary side temperature controller controls the flow rate of the secondary side fluid to meet the energy utilization requirement of a user side, so that the utilization rate of heat energy can be improved, and the transmission and distribution loss is reduced.

According to the utility model, through the design of the master controller, the influence of pressure disturbance of a transmission and distribution pipe network system on the heat exchange station is reduced, and the control precision of the primary side temperature controller is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a hydraulic balance system according to the present invention;

fig. 2 is a schematic diagram of the signal connection of the heat exchange station 100 with the server 300 (external);

FIG. 3 is a schematic diagram of the module connection of the primary side thermostat 110 in FIG. 2;

FIG. 4 is a schematic diagram of the module connection of the secondary side temperature controller 120 in FIG. 2;

fig. 5 is a schematic diagram of the module connection of the general controller 130 in fig. 2.

In the figure, 10 is a water supply pipe of a heat exchange station, 11 is a water return pipe of the heat exchange station, 20 is a primary water supply pipe, 21 is a primary water return pipe, 30 is a secondary water supply pipe, 31 is a secondary water return pipe, 40 is a main water supply pipe, 41 is a main water return pipe, 100 is a heat exchange station, 200 is an energy station, 300 is a server (external), 110 is a primary temperature controller, 111 is a first control unit, 112 is a first temperature sensor, 113 is a first regulating valve, 114 is a second temperature sensor, 120 is a secondary temperature controller, 121 is a second control unit, 122 is a third temperature sensor, 123 is a user circulation water pump (external), 124 is a fourth temperature sensor, 130 is a master controller, a third control unit 131, a pre-valve pressure sensor 132, a post-valve pressure sensor 133, a water supply pressure sensor 134, a second regulating valve 135, a water supply temperature sensor 136, a water return temperature sensor 137, a water return temperature sensor, 200 is the energy station, 210 is the secondary cycle pump assembly, 300 is the server (external).

Detailed Description

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

Embodiment 1, a heat exchange station 100, as shown in fig. 1 to 5, includes a water supply pipe 10 of the heat exchange station, a water return pipe 11 of the heat exchange station, and at least one heat exchange unit, where the heat exchange unit is communicated with an external user pipe network;

the heat exchange unit includes a heat exchanger (shown as HE0101 in fig. 1), a primary water supply pipe 20, a primary water return pipe 21, a secondary water return pipe 31, a secondary water supply pipe 30, a primary temperature controller 110, and a secondary temperature controller 120;

the heat exchange station water supply pipe 10 is communicated with the heat exchange station water return pipe 11 sequentially through the primary side water supply pipe 20, the heat exchanger and the primary side water return pipe 21;

the secondary side water supply pipe 30 is communicated with the secondary side water return pipe 31 through the heat exchanger, and both the secondary side water supply pipe 30 and the secondary side water return pipe 31 are communicated with an external user pipe network;

referring to fig. 1, a solid line in fig. 1 represents a water supply pipeline, a dotted line represents a water return pipeline, and for cooling, for example, low-temperature cold water in a water supply pipeline 10 of a heat exchange station enters a heat exchanger through a primary side water supply pipeline 20 for indirect heat exchange, and normal-temperature water after heat exchange enters a heat exchange station water return pipeline 11 through a primary side water return pipeline 21; meanwhile, normal temperature water in the user pipe network enters the heat exchanger through the secondary side water return pipe 31 to carry out indirect heat exchange, and the obtained low temperature cold water is conveyed to the user pipe network through the secondary side water supply pipe 30 to realize cooling for users.

The primary side temperature controller 110 is configured to collect a temperature signal corresponding to the primary side water return pipe 21, and is further configured to control a flow rate of a fluid in the primary side water return pipe 21 and also control a flow rate of a fluid in the primary side water supply pipe 20;

the secondary side temperature controller 120 is configured to collect a temperature signal corresponding to the secondary side water supply pipe 30, and is further configured to control a flow rate of a fluid in the secondary side water supply pipe 30 and also control a flow rate of a fluid in the secondary side water return pipe 31;

in the prior art, the energy source station 200 transmits and distributes heat energy to the heat exchange station 100, and indirect heat exchange is performed in the heat exchange station 100, so as to supply energy for an energy consumption unit, and in order to meet the energy consumption requirement of the energy consumption unit, the flow of the primary side is often adjusted according to the outlet water temperature of the secondary side, that is, the flow of the primary side is adjusted according to the deviation between the outlet water temperature of the secondary side and a set value, so as to ensure the constant outlet water temperature of the secondary side; when the load of the secondary side changes, the flow rate of the fluid in the secondary side is adjusted to meet the use requirement of a user;

above-mentioned technical scheme often appears the control maladjustment and leads to once side to supply the problem of return water temperature difference undersize, for example:

the temperature difference of the primary side water supply and return water is too small due to unreasonable return water temperature preset by a user, and when the primary side water supply temperature is 4 ℃ and the user preset water outlet temperature is 3 ℃, the secondary side water outlet temperature can only reach 4 ℃ even if the primary side water quantity reaches the maximum.

The temperature difference of the primary side water supply and return is too small due to the low secondary side load factor, and when the secondary side load factor is low, the temperature difference between the secondary side water inlet temperature (such as 4 ℃) and the primary side water inlet temperature (such as 6 ℃) is small, so that the temperature difference of the primary side water supply and return is too small.

When the temperature difference of the primary side supply return water is small, the heat energy is not fully utilized, and the water quantity waste exists at the primary side;

in this embodiment, the primary side temperature controller 110 controls the primary side flow rate to ensure the temperature difference of the primary side supply return water, and the secondary side temperature controller 120 controls the secondary side flow rate to satisfy the energy demand of the user side, thereby improving the heat energy utilization rate, reducing the primary side water waste, improving the transmission and distribution efficiency of the secondary circulating water pump, and reducing the operating power of the secondary circulating water pump.

The primary side temperature controller 110 of the present embodiment may be a known temperature difference adjusting valve, such as the valve disclosed in the patent publication No. CN 212155976U.

Further, referring to the temperature difference adjusting valve TV0101 in fig. 1, the primary side temperature controller 110 includes:

a first temperature sensor 112, disposed at the primary-side water return pipe 21, having a sampling point as indicated by T02 in fig. 1, and configured to detect a primary-side outlet water temperature;

a first regulating valve 113 provided in the primary-side water supply pipe 20 or the primary-side water return pipe 21, which is a V-shaped ball valve in this embodiment, and provided in the primary-side water return pipe 21;

the first control unit 111 is in signal connection with the first temperature sensor 112 and the first regulating valve 113, respectively, and is configured to control the valve opening degree of the first regulating valve 113 according to the temperature of the primary-side outlet water.

The first control unit 111 receives the temperature signal collected by the first temperature sensor 112 to obtain a corresponding outlet water temperature, calculates a deviation value between the outlet water temperature and a preset outlet water temperature setting value, and controls the opening and closing degree of the valve of the first regulating valve 113 based on the deviation value, thereby controlling the flow rate of the fluid flowing through the primary-side water return pipe 21.

Further, the primary side temperature controller 110 further includes a second temperature sensor 114;

the second temperature sensor 114, which is disposed at the primary side water supply pipe 20, has a sampling point as indicated by T01 in fig. 1, is used for detecting the temperature of the primary side inlet water, and is in signal connection with the first control unit 111;

the first control unit 111 is configured to control the valve opening degree of the first regulating valve 113 according to the primary inlet water temperature and the primary outlet water temperature.

The first control unit 111 controls the valve opening/closing degree of the first regulating valve 113 according to the primary inlet water temperature, the outlet water temperature, and a preset primary side temperature difference value.

For example, a temperature difference set value (10 ℃) of the primary side supply return water temperature is preset, after the primary side inlet water temperature is obtained, a corresponding outlet water temperature set value is obtained through calculation according to the temperature difference set value, the detected outlet water temperature is compared with the calculated outlet water temperature set value, a deviation value is obtained, and the valve opening degree of the first regulating valve 113 is controlled based on the deviation value.

This embodiment can be along with the temperature automatically regulated play water temperature setting value of once intaking for the deviation value that calculates gained more fits the reality, further improves the utilization ratio of heat energy.

Further, the secondary side temperature controller 120 includes:

a third temperature sensor 122, disposed at the secondary side water supply pipe 30, with a sampling point as indicated by T03 in fig. 1, for detecting the secondary side outlet water temperature;

and the second control unit 121 is respectively connected with the third temperature sensor 122 and an external user circulating water pump 123 through signals, and is used for controlling the user circulating water pump 123 to work according to the outlet water temperature on the secondary side.

In this embodiment, the second control unit 121 may adopt a circulating water pump frequency converter that is already disclosed, and the circulating water pump frequency converter controls the start-stop and the operating frequency of the circulating water pump according to the water pressure and/or the water temperature, which belongs to the prior art, so detailed description thereof is omitted.

Further, the secondary side temperature controller 120 further includes a fourth temperature sensor 124;

the fourth temperature sensor 124 is disposed at the secondary-side water return pipe 31, a sampling point of which is shown as T04 in fig. 1, is used for detecting the temperature of the secondary-side inlet water, and is in signal connection with the second control unit 121;

and the second control unit 121 is configured to control the user circulating water pump 123 to work according to the inlet water temperature and the outlet water temperature of the secondary side.

The second control unit 121 in this embodiment performs variable flow rate adjustment according to the user load and the inlet water temperature and the outlet water temperature of the secondary side, which is a conventional technology, and therefore, detailed description thereof is omitted.

This embodiment reduces secondary circulating water pump operating power through guaranteeing the supply return water difference of each heat transfer unit primary side, though for satisfying user's ability needs this moment, user circulating water pump 123's operating power can rise, but because secondary circulating water pump operating power is greater than the user circulating water pump 123 of secondary side far away, so whole operating power will descend.

Further, the heat exchanger adopts a plate heat exchanger.

Embodiment 2, a master controller 130 is added to the heat exchange station 100 disclosed in embodiment 1, and the other parts are the same as those in embodiment 1;

the master controller 130 is used for acquiring the pressure difference of the water supply and the water return of the heat exchange station 100 and performing pressure difference control;

the general controller 130 in this embodiment is disposed at the water return pipe 11 of the heat exchange station, and can adopt a pressure difference regulating valve that is already disclosed nowadays, as shown in a pressure difference regulating valve PV in fig. 1, the valve provided in the patent with publication number CN212155976U is adopted in this embodiment.

The master controller 130 plays a dual role of distributing the pressure difference in the heat exchange station 100 and improving the control accuracy of the primary side temperature controller 110.

Since each heat exchange station 100 has different load rates at different times, a hydraulic imbalance phenomenon inevitably exists between the heat exchange stations 100 in the same system, and in this embodiment, the pressure difference balance is performed on the heat exchange stations 100 through the design of the master controller 130, so as to ensure that the flow of the heat exchange station 100 is stable and is not affected by the pressure disturbance of the transmission and distribution network system, that is, the master controller 130 is designed to ensure that the flow of the heat exchange station 100 is stable. The master controller 130 plays a role in balancing the pressure difference of each heat exchange station 100 and reducing the pressure disturbance of the transmission and distribution pipe network system.

When the cold/heat load of the heat exchange station 100 is low, the required water supply amount of the energy station 200 is small, and the water supply and return pressure difference at the inlet of the heat exchange station 100 is too large, so that the opening degree of each first regulating valve 113 in the heat exchange station 100 is small, the valve weight degree is low, the regulating characteristic of the first regulating valve 113 becomes poor, the small opening degree change causes large flow change, and the stability of the temperature control system is poor.

In the embodiment, through the design of the master control valve, a part of the pressure difference is eliminated at the inlet of the heat exchange station 100, so that the working opening of the first regulating valve 113 is averagely improved by more than 40%. Because the feedback speed of the pressure difference detection is high, the master control valve can realize accurate and rapid control, thereby improving the control precision and stability of the primary side temperature controller 110.

In practical application, the initial opening degrees of the master control valve and the first regulating valve 113 are both minimum opening degrees, so as to ensure safety.

Further:

the master controller 130 includes a second regulating valve 135, a pre-valve pressure sensor 132, a post-valve pressure sensor 133, a feed water pressure sensor 134, and a third control unit 131;

the second regulating valve 135 is arranged at the position of the water return pipe 11 of the heat exchange station, the pre-valve pressure sensor 132 is arranged at the water inlet of the second regulating valve 135, the post-valve pressure sensor 133 is arranged at the water outlet of the second regulating valve 135, and the water supply pressure sensor 134 is arranged at the position of the water supply pipe 10 of the heat exchange station;

the third control unit 131 is respectively connected to the second regulating valve 135, the pre-valve pressure sensor 132, the post-valve pressure sensor 133 and the water supply pressure sensor 134 in signal mode, and is configured to receive pressure signals collected by the pre-valve pressure sensor 132, the post-valve pressure sensor 133 and the water supply pressure sensor 134, and further configured to control a valve opening/closing degree of the second regulating valve 135.

In this embodiment, the second regulating valve 135 is a V-shaped ball valve, the third control unit 131 is a PID control unit that is already disclosed in the prior art, and the opening and closing degree of the corresponding regulating valve is controlled based on the collected pressure signal, which belongs to the prior art, so detailed description thereof is omitted.

Further, the general controller 130 further comprises a water supply temperature sensor 136 and a water return temperature sensor 137;

the water supply temperature sensor 136 is arranged at the position of a water supply pipe 10 of the heat exchange station, a sampling point is shown as T05 in fig. 1, the water return temperature sensor 137 is arranged at the position of a water return pipe 11 of the heat exchange station, a sampling point is shown as T06 in fig. 1, and the water supply temperature sensor 136 and the water return temperature sensor 137 are in signal connection with the third control unit 131.

The third control unit 131 can implement energy management on the heat exchange station 100 by combining the pressure data and the temperature data, for example, real-time flow accumulation and energy accumulation values are calculated by using the data obtained by sampling, and after the real-time values are compared with the previously set control target values, the opening degree of the second regulating valve 135 is adjusted according to a PID algorithm, which is the prior art, so detailed description thereof is omitted in this embodiment.

Further:

the master controller 130, the primary side temperature controller 110 and the secondary side temperature controller 120 are all connected to the external server 300 by signals, as shown by the two-dot chain line in fig. 1.

That is, the first control unit 111, the second control unit 121, and the third control unit 131 are all signal-connected to the external server 300.

In this embodiment, the master controller 130, the primary side temperature controller 110 and the secondary side temperature controller 120 are all connected to an external power source, and the external power source supplies power to the master controller, which is the prior art, and therefore detailed description thereof is omitted in this embodiment.

In the actual use process:

each control unit uploads the obtained temperature data and/or pressure data to the external server 300, the first control unit 111 and the third control unit 131 also upload the opening and closing degree of the controlled regulating valve to the external server 300, and the second control unit 121 uploads the operating power of the user circulating water pump 123 to the external server 300;

the external server 300 may store the received data, provide data support for subsequent analysis work, and issue corresponding control instructions to the first control unit 111 and the third control unit 131 according to the received data, so that the first control unit 111 and the third control unit 131 adjust the opening and closing degrees of the corresponding adjusting valves based on the received control instructions.

For example, the external server 300 determines the first regulating valve 113 having the largest opening degree of the valve in the heat exchange station 100, sets the loop in which the first regulating valve 113 is located as the worst loop, and adjusts the third regulating valve to maintain the opening degree of the valve of the first regulating valve 113 at about 90%.

Embodiment 3, a hydraulic balance control system, comprising:

the heat exchange system comprises an energy station 200, a main water supply pipe 40, a main water return pipe 41 and at least one heat exchange station 100, wherein the heat exchange station 100 is the heat exchange station 100 disclosed in embodiment 1 or embodiment 2;

the energy station 200 is communicated with the heat exchange station water supply pipe 10 of each heat exchange station 100 through a main water supply pipe 40, and is communicated with the heat exchange station water return pipe 11 of each heat exchange station 100 through a main water return pipe 41, so as to distribute heat energy to each heat exchange station 100.

In the prior art, the energy station 200 comprises cold and heat source equipment, a primary circulating pump assembly and a secondary circulating pump assembly 210, wherein the primary circulating pump assembly is matched with the cold and heat source equipment for use, runs at a fixed flow rate, and is used for overcoming the resistance between a pipeline in a station room of the energy station 200 and the cold and heat source equipment; the secondary circulation pump assembly 210 operates at a variable flow rate, and the conveying energy consumption is mainly generated by a secondary circulation water pump.

In actual operation, because the energy station 200 is in a low-load state most of the time, the number of operating devices is small, and the energy consumption ratio of conveying is further highlighted. Because the number of users staying in the system is small, the resistance loss of the area pipe network is small, the surplus lift of the secondary circulating pump assembly 210 can be consumed at the temperature difference adjusting valve of each heat exchange station 100, and at the moment, the opening degree of the temperature difference adjusting valve is small, the resistance is large, the adjustability is poor, and the temperature control precision is low; the actual operating point of the secondary circulating water pump also deviates from the high-efficiency interval seriously, and the actual measurement efficiency of the secondary circulating pump assembly of a certain project is only 46.1 percent.

The embodiment can guarantee the temperature difference of the supply and return water of the energy station 200 through the design of the heat exchange station 100, reduces the transmission and distribution energy consumption from the user use side, can also reduce the disturbance of the pressure difference of the inlet of each heat exchange station 100, consumes the redundant pressure difference, and improves the stability of the primary side temperature controller 110 in the heat exchange station 100.

Further, each secondary circulation pump assembly 210 is signally connected to an external server 300.

In this embodiment, the secondary circulation pump assembly 210 includes a circulation water pump frequency converter and a plurality of secondary circulation water pumps connected with the circulation water pump frequency converter in signal, and the external server 300 obtains the working data of each secondary circulation water pump through the circulation water pump frequency converter and controls the start, stop and operating frequency of each secondary circulation water pump.

Further:

a first pressure sensor is arranged on the main water supply pipe 40, a sampling point is shown as P01 in fig. 1, a second pressure sensor is arranged on the main water return pipe 41, a sampling point is shown as P02 in fig. 1, a flow sensor is also arranged on the main water return pipe 41, and a sampling point is shown as F01 in fig. 1;

the first pressure sensor, the second pressure sensor and the flow sensor are all in signal connection with an external server 300.

During actual use, the external server 300 records pressure data of the main water supply pipe 40 and the main water return pipe 41 and flow data of the main water return pipe 41 to provide data support for subsequent analysis work;

the external server 300 may also control the operation of each secondary circulating water pump according to the received data, so as to minimize the total operating power of the water pump group formed by each secondary circulating water pump, for example:

the external server 300 determines the number of operating secondary circulating water pumps according to data uploaded by the first pressure sensor (pressure of the main water supply pipe 40), the second pressure sensor (pressure of the main water return pipe 41) and the flow sensor (flow of the main water return pipe 41), and data uploaded by the frequency converter of the circulating water pump (operating state, frequency and power of each secondary circulating water pump), so that the corresponding number of secondary circulating water pumps operate through the frequency converter of the circulating water pump.

Based on the data (the valve opening degree of the second regulating valve 135) uploaded by each general controller 130, the frequency of the running secondary circulating water pump is regulated by the circulating water pump frequency converter, so that the maximum opening degree of the second regulating valve 135 is within a preset threshold range (for example, about 90%).

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It should be noted that:

reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the utility model. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the utility model which are described in the patent conception of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. A heat exchange station comprises a heat exchange station water supply pipe, a heat exchange station water return pipe and at least one heat exchange unit, wherein the heat exchange unit is communicated with an external user pipe network; the method is characterized in that:

2. The heat exchange station of claim 1, wherein the primary side thermostat comprises:

3. The heat exchange station of claim 2, wherein the primary side thermostat further comprises a second temperature sensor;

the second temperature sensor is arranged at the position of the primary side water supply pipe, is used for detecting the temperature of the primary side inlet water and is in signal connection with the first control unit;

4. The heat exchange station of claim 1, wherein the secondary side thermostat comprises:

5. The heat exchange station of claim 4, wherein the secondary side thermostat further comprises a fourth temperature sensor;

6. The heat exchange station according to any one of claims 1 to 5, further comprising a master controller, the master controller comprising a second regulating valve, a pre-valve pressure sensor, a post-valve pressure sensor, a feed water pressure sensor, and a third control unit;

7. The heat exchange station of claim 6, wherein the master controller further comprises a water supply temperature sensor and a water return temperature sensor;

8. The heat exchange station of claim 7, wherein:

9. A hydraulic balancing system, characterized in that it comprises a heat exchange station according to any one of claims 1 to 8.

10. The hydraulic balancing system of claim 9, further comprising an energy station, a main water supply pipe, and a main water return pipe, wherein the heat exchange station water supply pipe of each heat exchange station is in communication with the main water supply pipe, and the heat exchange station water return pipe is in communication with the main water return pipe;