Heat supply network control system for zone control

Abstract

The utility model provides a heat supply network control system for zone control, which comprises a heat supply end and a heat utilization end which are respectively connected through a water supply pipeline and a water return pipeline, and further comprises a heat meter, an electric regulating valve, a cut-off switch valve, a water pump, a one-way valve, a side through pipeline, a bypass switch valve and a control module, the heat meter, the electric control valve and the cut-off switch valve are all arranged on the water supply pipeline, and the heat meter, the electric control valve and the cut-off switch valve are connected in sequence; the two ends of the water pump are electrically connected with the output end of the electric adjusting valve and the input end of the one-way valve correspondingly, and the output end of the one-way valve is connected with the output end of the cut-off switch valve and connected to the heat using end. The control module controls opening and closing of the electric adjusting valve, the cut-off switch valve, the water pump, the one-way valve and the bypass switch valve so that the heat supply network can be switched to be in different adjusting and controlling modes, hydraulic balance adjusting and controlling can be rapidly achieved for different types of partition buildings under the same central heating system, and heat waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating network control, in particular to a heating network control system for zoning control. Background Art

[0002] In the current park-level centralized heating system, the heating equipment in each zone's buildings may include floor heating, fan coil air conditioning terminal heating, centralized air supply heating, radiator heating, etc. Different heating equipment requires different water supply temperatures, and the product's supply and return water temperature difference design is also different.

[0003] Publication No. CN 212029710U heating network control system, including indoor temperature monitoring device, mobile communication equipment, PLC equipment, heating network dispatch center system and data acquisition terminal; indoor temperature monitoring device, PLC equipment and heating network dispatch center are wirelessly connected to mobile communication equipment respectively; data acquisition terminal is connected to PLC equipment, and also includes a data server arranged between mobile communication equipment and heating network dispatch center system. Because the heating network lacks the regulation function for heat in the existing heating process, there is uneven regional heating, and different types of zoned buildings are unbalanced in the same centralized heating, which will cause heat waste. Utility Model Content

[0004] In view of this, the utility model proposes a heat network control system for zoning control. Through the regulation functions of different modes of the entire heat network control system, hydraulic balance regulation can be quickly achieved for different types of zoned buildings under the same central heating system, thereby reducing heat waste.

[0005] The technical solution of the utility model is implemented as follows: the utility model provides a heat network control system for zone control, which includes a heat supply end and a heat use end, wherein the heat supply end and the heat use end are respectively connected through a water supply pipeline and a return water pipeline for circulating heat source;

[0006] It also includes a heat meter, an electric regulating valve, a stop switch valve, a water pump, a check valve, a side pipeline, a bypass switch valve and a control module, wherein:

[0007] The heat meter, the electric regulating valve and the stop switch valve are all arranged on the water supply pipeline, and the heat meter, the electric regulating valve and the stop switch valve are connected in sequence;

[0008] The two ends of the water pump are electrically connected to the output end of the electric regulating valve and the input end of the one-way valve respectively, and the output end of the one-way valve is connected to the output end of the cut-off switch valve and connected to the heat-using end;

[0009] The side pipeline is connected between the water supply pipeline and the return pipeline, and one end of the side pipeline is connected to the input end of the heat meter; the bypass switch valve is arranged on the side pipeline;

[0010] The output end of the heat meter is electrically connected to the input end of the control module, and the output end of the control module is electrically connected to the input ends of the electric regulating valve, the shut-off switch valve, the water pump, the one-way valve and the bypass switch valve, for controlling the opening and closing of the electric regulating valve, the shut-off switch valve, the water pump, the one-way valve and the bypass switch valve.

[0011] On the basis of the above technical solution, preferably, the control module includes a control unit, two switching units, a temperature control unit, a display unit and a communication unit, wherein:

[0012] The two adapter units are electrically connected to the control unit, the other end of one adapter unit is electrically connected to the heat meter, and the other end of the other adapter unit is electrically connected to the water pump;

[0013] The output end of the temperature control unit is electrically connected to the input end of the control unit for setting the target value of the supply and return water temperature;

[0014] The output end of the display unit is electrically connected to the input end of the control unit, and is used to display the set supply and return water temperature target value;

[0015] The communication unit is electrically connected to the control unit, and the communication unit is communicatively connected to the centralized heating dispatching platform, and is used to upload the heat collected by the heat meter to the centralized heating dispatching platform.

[0016] On the basis of the above technical scheme, preferably, the adapter unit includes a chip U4, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and an end row J1, wherein pins 4 and 1 of the chip U4 are electrically connected to the control unit, pin 5 of the chip U4 is grounded, pin 8 of the chip U4 is connected to the power supply, pin 6 of the chip U4 is electrically connected to the resistor R3, the resistor R2, the capacitor C1, the capacitor C2 and the end row J1 respectively, the other end of the resistor R3 is grounded, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded, pin 7 of the chip U4 is electrically connected to the other end of the resistor R2, the resistor R1 and the end row J1 respectively, the other end of the resistor R1 is connected to the power supply, and the resistor R1 is also electrically connected to the capacitor C2.

[0017] On the basis of the above technical scheme, preferably, the temperature control unit includes a key switch SW2, a resistor R9, a key switch SW3, a resistor R10, a key switch SW4, a resistor R11, a key switch SW5 and a resistor R12, wherein one end of the key switch SW2, the key switch SW3, the key switch SW4 and the key switch SW5 are all electrically connected to the control unit, the other end of the key switch SW2 is electrically connected to the resistor R9, the other end of the key switch SW3 is electrically connected to the resistor R11, the other end of the key switch SW4 is electrically connected to the resistor R11, the other end of the key switch SW5 is electrically connected to the resistor R12, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are electrically connected, and are commonly connected to the power supply.

[0018] On the basis of the above technical scheme, preferably, the display unit includes a power chip U2, a capacitor C8, a capacitor C9 and a display chip U3, wherein the power chip U2 is electrically connected to the control unit, the display chip U3 is electrically connected to the power chip U2, the power chip U2 is electrically connected to the power input terminal of the display chip U3, and they are commonly connected to the power supply, the power chip U2 is electrically connected to the ground terminal of the display chip U3, and they are commonly grounded, the two ends of the capacitor C8 are respectively electrically connected to pin 4 and pin 5 of the power chip U2, and the two ends of the capacitor C9 are respectively electrically connected to pin 1 and pin 3 of the power chip U2.

[0019] On the basis of the above technical scheme, preferably, the communication unit 125 includes a chip U6, a resistor R13, a capacitor C11, a capacitor C10 and an antenna AE1, wherein pin 39 of the chip U6 is electrically connected to the resistor R13 and the capacitor C11 respectively, the other end of the capacitor C11 is grounded, the other end of the resistor R13 is electrically connected to the capacitor C10 and the antenna AE1 respectively, the other end of the capacitor C10 is grounded, the chip U6 is electrically connected to the control unit, the power input end of the chip U6 is connected to the power supply, and the ground end of the chip U6 is grounded.

[0020] On the basis of the above technical solution, preferably, the control module also includes a reset unit, and the reset unit includes a resistor R7, a resistor R8, a reset switch SW1 and a capacitor C5, wherein the negative electrodes of the resistor R7 and the capacitor C5 are electrically connected to one end of the resistor R8, and are commonly electrically connected to the input end of the chip U6, the other end of the resistor R8 is grounded, the other end of the resistor R7 is electrically connected to one end of the reset switch SW1, the positive electrode of the capacitor C5 is electrically connected to the other end of the reset switch SW1, and are commonly connected to the power supply.

[0021] On the basis of the above technical solution, preferably, the control module also includes two pressure detection modules, the output ends of the two pressure detection modules are electrically connected to the input end of the control unit, and the two pressure detection modules are used to detect the water supply pressure and the return water pressure respectively.

[0022] On the basis of the above technical scheme, preferably, the pressure detection module includes a pressure sensor, an end row J2, a resistor R15, a capacitor C6 and a chip U5, wherein the pressure sensors are fixedly installed on the water supply pipeline and the return pipeline respectively, the output end of the pressure sensor is electrically connected to the end row J2, pin 3 of the end row J2 is connected to the power supply, pin 1 of the end row J2 is electrically connected to capacitor C6, resistor R15 and pin 2 of chip U5 respectively, pin 2 of the end row J2 is electrically connected to the other end of capacitor C6 and the other end of resistor R2 and pin 4 of chip U5 respectively, and are commonly grounded, pin 5 and pin 6 of chip U5 are electrically connected, and are commonly connected to the input end of the control unit, and pin 8 of chip U5 is connected to the power supply.

[0023] On the basis of the above technical solution, preferably, the chip model of the control unit is STM32F098RCYX.

[0024] The heat network control system for zone control of the utility model has the following beneficial effects compared with the prior art:

[0025] 1. The control module controls the opening and closing of the electric regulating valve, the stop switch valve, the water pump, the one-way valve and the bypass switch valve to realize the switching of the heat network to different control modes, so as to quickly realize the hydraulic balance control of different types of district buildings under the same central heating system, thereby reducing the waste of heat;

[0026] 2. By setting up a communication unit to communicate with the centralized heating dispatching platform, the control unit can exchange data with the centralized heating dispatching platform to enable the platform to dispatch and manage its heating system pipeline network and each heating area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the structure of the heat network control system for zone control of the utility model;

[0029] Figure 2This is a circuit block diagram of a control module of a heating network control system for zone control of the utility model;

[0030] Figure 3 This is a circuit schematic diagram of the connection between the control unit, the temperature control unit and the display unit of the heat network control system for zone control of the utility model;

[0031] Figure 4 This is a circuit diagram of a switching unit of a heating network control system for zone control according to the utility model;

[0032] Figure 5 This is a circuit schematic diagram of a communication unit of a heating network control system for zoned control according to the utility model;

[0033] Figure 6 This is a schematic circuit diagram of a reset unit of a heating network control system for zoned control according to the utility model;

[0034] Figure 7 This is a circuit schematic diagram of a pressure detection module of a heating network control system for zone control according to the utility model. DETAILED DESCRIPTION

[0035] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] like Figure 1As shown, the utility model is a heat network control system for zoning control, which includes a heat supply end 1 and a heat use end 2, the heat supply end 1 and the heat use end 2 are respectively connected through a water supply pipeline 3 and a return water pipeline 4 for heat source circulation and transportation; it also includes a heat meter 5, an electric regulating valve 6, a stop switch valve 7, a water pump 8, a one-way valve 9, a side pipeline 10, a bypass switch valve 11 and a control module 12, wherein the heat meter 5, the electric regulating valve 6 and the stop switch valve 7 are all arranged on the water supply pipeline 3, and the heat meter 5, the electric regulating valve 6 and the stop switch valve 7 are connected in sequence; the two ends of the water pump 8 are respectively connected to the output end of the electric regulating valve 6 and the output end of the one-way valve 9 The input end is electrically connected, the output end of the one-way valve 9 is connected to the output end of the stop switch valve 7, and is connected to the heat-using end 2; the side pipeline 10 is connected between the water supply pipeline 3 and the return water pipeline 4, and one end of the side pipeline 10 is connected to the input end of the heat meter 5; the bypass switch valve 11 is arranged on the side pipeline 10; the output end of the heat meter 5 is electrically connected to the input end of the control module 12, and the output end of the control module 12 is electrically connected to the input end of the electric regulating valve 6, the stop switch valve 7, the water pump 8, the one-way valve 9 and the bypass switch valve 11, which is used to control the opening and closing of the electric regulating valve 6, the stop switch valve 7, the water pump 8, the one-way valve 9 and the bypass switch valve 11.

[0037] It should be noted that the control module 12 controls the opening and closing of the electric regulating valve 6, the stop switch valve 7, the water pump 8, the one-way valve 9 and the bypass switch valve 11 to realize the switching of the heating network to different control modes;

[0038] When switched to the normal control mode, the control module 12 controls the bypass switch valve 11 to close, the stop switch valve 7 to open, and the valve opening of the electric control valve 6 is controlled according to the set supply and return water temperature target;

[0039] The system manually sets the water supply target upper limit Tg according to the temperature control unit 123. max , the control dead zone is [Tg max -a, Tg max +a], a is the control interval temperature, the default is 1°C, and can be set by the administrator;

[0040] The system manually sets the return water target lower limit Th according to the temperature control unit 123 min , the control dead zone is Th min -b,Th min +b], b is the control interval temperature, the default is 1℃, which can be set by the administrator;

[0041] Among them, the valve opening adjustment of the electric control valve 6 is adjusted according to the return water temperature condition. The main adjustment principle is that the larger the valve opening of the electric control valve 6, the higher the return water temperature, and the lower the valve opening of the electric control valve 6, the lower the return water temperature.

[0042] The actual return water temperature of the system Th<the set value Th min -b, the valve of the electric regulating valve 6 increases in opening according to the control unit 121 until Th=Th min When the opening degree increases, it stops; if the valve of the electric regulating valve 6 is opened to the maximum opening degree, Th is still less than the set value Th min -b, enter the boost control mode;

[0043] The actual return water temperature of the system Th∈set value [Th min -b,Th min +b], the valve state of the electric regulating valve 6 is maintained;

[0044] The actual return water temperature of the system Th> the set value Th min +b, the valve of the electric regulating valve 6 first decreases its opening according to the control unit 121 until Th=Th min , or the valve opening of the electric control valve 6 is to the minimum opening. When one of the two conditions is met, the valve state of the electric control valve 6 is maintained.

[0045] When switching to the boost control mode, the bypass switch valve 11 is closed and the stop switch valve 7 is closed through the control module 12, and the valve opening of the electric regulating valve 6 is controlled according to the set supply and return water temperature targets, and the supply water pressure and return water pressure are measured. According to the supply and return pressure difference, the operating frequency of the water pump 8 is adjusted through the control unit 121;

[0046] Measure and calculate the pressure difference ΔP=P1-P2 between the two points of water supply pressure and return water pressure, where P1 is the pressure measurement value at the first point on the water supply pipeline 3; P2 is the pressure measurement value at the second point on the return water pipeline 4.

[0047] Manually set the minimum pressure difference ΔP between the first point on the system water supply line 3 and the second point on the return line 4 min ; The greater the frequency of the water pump 8, the greater the water supply pressure value ΔP; conversely, the smaller it is; when the system is in boost control mode, the operating frequency of the water pump 8 must be regulated to ensure that the system supply and return water pressure is greater than ΔPmin, and temperature control is performed under this condition;

[0048] When the return water temperature Th<the set value Th min -b, then the frequency of pump 8 needs to be increased until Th=Th min The frequency increase stops when the pump 8 frequency increases to the maximum;

[0049] Return water temperature Th>set value Th min +b, the frequency of water pump 8 needs to be reduced until Th=Th minThe frequency reduction stops when the pump 8 frequency is reduced to the minimum supply and return water pressure difference ΔP min value.

[0050] When switched to the constant heat supply mode, the system manually sets the water supply temperature value and feeds back to the control unit 121 through the heat meter 15. When the accumulated heat value reaches the limit, the control unit 121 controls the electric regulating valve 6 to close and adjusts the water pump 8 to close.

[0051] When switched to the antifreeze control mode, the control unit 121 controls the bypass switch valve 11 to open and the stop switch valve 7 to close, controls the valve opening size of the electric regulating valve 6 according to the set supply and return water temperature target, and then adjusts the operating frequency of the water pump 8 according to the pressure difference between the first point on the water supply pipeline 3 and the second point on the return water pipeline 4.

[0052] like Figure 2 As shown, the control module 12 in this embodiment includes a control unit 121, two adapter units 122, a temperature control unit 123, a display unit 124 and a communication unit 125, wherein the two adapter units 122 are electrically connected to the control unit 121, the other end of one adapter unit 122 is electrically connected to the heat meter 5, and the other end of the other adapter unit 122 is electrically connected to the water pump 8; the output end of the temperature control unit 123 is electrically connected to the input end of the control unit 121, and is used to set the target value of the supply and return water temperature; the output end of the display unit 124 is electrically connected to the input end of the control unit 121, and is used to display the set target value of the supply and return water temperature; the communication unit 125 is electrically connected to the control unit 121, and the communication unit 125 is communicatively connected to the centralized heating scheduling platform, and is used to upload the heat collected by the heat meter 5 to the centralized heating scheduling platform.

[0053] It should be noted that the adapter unit 122 is a 485 interface, one adapter unit 122 is connected to the heat meter 5, and the other adapter unit 122 is connected to the water pump 8. The heat value collected by the heat meter 5 is transmitted to the control unit 121 for accumulation, and the supply and return water temperature target value is set by the temperature control unit 123. In the normal control mode, the control unit 121 controls the bypass switch valve 11 to close and the stop switch valve 7 to open, and controls the valve opening of the electric control valve 6 according to the supply and return water temperature target value through the control unit 121. In the constant heat supply mode, when the heat accumulation value of the heat meter 5 reaches the supply and return water temperature target value, the control unit 121 controls the electric control valve 6 to close and the regulating water pump 8 to close; in the boost control mode and the antifreeze control mode, the valve opening of the electric control valve 6 is controlled according to the supply and return water temperature target value, and the water pump 8 operating frequency is controlled by the control unit 121 according to the supply and return pressure difference.

[0054] Specifically, the chip model of the control unit 121 in this embodiment is STM32F098RCYX.

[0055] like Figure 4 As shown, the adapter unit 122 in this embodiment includes a chip U4, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and an end row J1, wherein pin 4 and pin 1 of the chip U4 are electrically connected to the control unit 121, pin 5 of the chip U4 is grounded, pin 8 of the chip U4 is connected to a power supply, pin 6 of the chip U4 is electrically connected to the resistor R3, the resistor R2, the capacitor C1, the capacitor C2 and the end row J1 respectively, the other end of the resistor R3 is grounded, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded, pin 7 of the chip U4 is electrically connected to the other end of the resistor R2, the resistor R1 and the end row J1 respectively, the other end of the resistor R1 is connected to a power supply, and the resistor R1 is also electrically connected to the capacitor C2.

[0056] Specifically, the model of the chip U4 is MAX485, wherein the heat meter 5 and the water pump 8 are respectively connected through two extended 485 interfaces, so as to realize signal transmission between the heat meter 5 and the water pump 8 and the control unit 121.

[0057] like Figure 3 As shown, the temperature control unit 123 in this embodiment includes a key switch SW2, a resistor R9, a key switch SW3, a resistor R10, a key switch SW4, a resistor R11, a key switch SW5 and a resistor R12, wherein one end of the key switch SW2, the key switch SW3, the key switch SW4 and the key switch SW5 are all electrically connected to the control unit 121, the other end of the key switch SW2 is electrically connected to the resistor R9, the other end of the key switch SW3 is electrically connected to the resistor R11, the other end of the key switch SW4 is electrically connected to the resistor R11, the other end of the key switch SW5 is electrically connected to the resistor R12, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are electrically connected, and are commonly connected to a power supply.

[0058] It should be noted that a plurality of button switches are connected to the control unit 121, and the target values ​​of the supply and return water temperatures are set by manual adjustment by people.

[0059] like Figure 3 As shown, the display unit 124 in this embodiment includes a power chip U2, a capacitor C8, a capacitor C9 and a display chip U3, wherein the power chip U2 is electrically connected to the control unit 121, the display chip U3 is electrically connected to the power chip U2, the power chip U2 is electrically connected to the power input terminal of the display chip U3, and they are commonly connected to the power supply, the power chip U2 is electrically connected to the ground terminal of the display chip U3, and they are commonly grounded, the two ends of the capacitor C8 are electrically connected to pin 4 and pin 5 of the power chip U2 respectively, and the two ends of the capacitor C9 are electrically connected to pin 1 and pin 3 of the power chip U2 respectively.

[0060] It should be noted that the calorific value collected by the heat meter 5 is transmitted to the control unit 121 for accumulation, and the signal is transmitted to the display chip U3 through the control unit 121, and the accumulated value is displayed on the display chip U3. At the same time, the supply and return water temperature target value is manually adjusted and set through the temperature control unit 123, and the signal is transmitted to the display chip U3 through the control unit 121, and the accumulated value is displayed on the display chip U3.

[0061] Specifically, the model of the power chip U2 in this embodiment is MAX232, and the model of the display chip U3 is EA_eDIP128W-6LW.

[0062] like Figure 5 As shown, the communication unit 125 in this embodiment includes a chip U6, a resistor R13, a capacitor C11, a capacitor C10 and an antenna AE1, wherein the pin 39 of the chip U6 is electrically connected to the resistor R13 and the capacitor C11 respectively, the other end of the capacitor C11 is grounded, the other end of the resistor R13 is electrically connected to the capacitor C10 and the antenna AE1 respectively, the other end of the capacitor C10 is grounded, the chip U6 is electrically connected to the control unit 121, the power input end of the chip U6 is connected to the power supply, and the ground end of the chip U6 is grounded.

[0063] It should be noted that, by communicating with the centralized heating dispatching platform through the communication unit 125, the heat collected by the heat meter 5 is uploaded to the centralized heating dispatching platform to facilitate comprehensive heat management.

[0064] like Figure 6 As shown, the control module 12 in this embodiment also includes a reset unit 126, and the reset unit 126 includes a resistor R7, a resistor R8, a reset switch SW1 and a capacitor C5, wherein the negative electrodes of the resistor R7 and the capacitor C5 are electrically connected to one end of the resistor R8, and are commonly electrically connected to the input end of the chip U6, the other end of the resistor R8 is grounded, the other end of the resistor R7 is electrically connected to one end of the reset switch SW1, the positive electrode of the capacitor C5 is electrically connected to the other end of the reset switch SW1, and are commonly connected to the power supply.

[0065] It should be noted that by pressing the reset switch SW1, the setting data and output data of the control unit 121 are restored to the initial values, which plays a reset role.

[0066] The control module 12 in this embodiment further includes two pressure detection modules 127 , the output ends of the two pressure detection modules 127 are electrically connected to the input end of the control unit 121 , and the two pressure detection modules 127 are used to detect the water supply pressure and the return water pressure respectively.

[0067] like Figure 7As shown, the pressure detection module 127 in this embodiment includes a pressure sensor, an end row J2, a resistor R15, a capacitor C6 and a chip U5, wherein the pressure sensors are fixedly mounted on the water supply pipeline 3 and the return pipeline 4, respectively, the output end of the pressure sensor is electrically connected to the end row J2, pin 3 of the end row J2 is connected to a power supply, pin 1 of the end row J2 is electrically connected to capacitor C6, resistor R15 and pin 2 of chip U5, respectively, pin 2 of the end row J2 is electrically connected to the other end of capacitor C6 and the other end of resistor R2 and pin 4 of chip U5, and are commonly grounded, pin 5 and pin 6 of chip U5 are electrically connected, and are commonly connected to the input end of the control unit 121, and pin 8 of chip U5 is connected to a power supply.

[0068] It should be noted that the two pressure sensors are fixedly installed at the first point on the water supply pipeline 3 and the second point on the water return pipeline 4 to detect the water supply pressure and the water return pressure respectively, and transmit the detected signals to the control unit 121.

[0069] Specifically, the model of the pressure sensor in this embodiment is MPX4115, and the chip U5 is ADC0832.

[0070] Working principle:

[0071] The heat value collected by the heat meter 5 is transmitted to the control unit 121 for accumulation, and the target value of the supply and return water temperature is set by the temperature control unit 123;

[0072] In the normal control mode, the control unit 121 controls the bypass switch valve 11 to close and the stop switch valve 7 to open, and controls the valve opening of the electric regulating valve 6 according to the target value of the supply and return water temperature through the control unit 121, so that the return water temperature reaches the set target value;

[0073] When switched to the boost control mode, the control unit 121 controls the bypass switch valve 11 to close, the stop switch valve 7 to close, the opening of the electric regulating valve 6 to adjust to the maximum value or the set minimum value, and keep the state unchanged, and adjust the water pump 8 to adjust the operating frequency according to the return water temperature so that the return water temperature reaches the set target value;

[0074] When switching to the constant heat supply mode, when the heat accumulation value of the heat meter 5 reaches the target value of the supply and return water temperature, the control unit 121 controls the electric regulating valve 6 and the water pump 8 to close;

[0075] When switching to the antifreeze control mode, the control unit 121 controls the bypass switch valve 11 to open and the stop switch valve 7 to close, controls the valve opening of the electric regulating valve 6 according to the supply and return water temperature target value, and controls the operating frequency of the water pump 8 through the control unit 121 according to the supply and return pressure difference, so that the return water temperature reaches the set target value.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat network control system for zone control, comprising a heat supply end (1) and a heat use end (2), wherein the heat supply end (1) and the heat use end (2) are connected via a water supply pipeline (3) and a water return pipeline (4) respectively, for circulating heat source; Features: It also includes a heat meter (5), an electric regulating valve (6), a stop switch valve (7), a water pump (8), a one-way valve (9), a side pipeline (10), a bypass switch valve (11) and a control module (12), wherein: The heat meter (5), the electric regulating valve (6) and the stop switch valve (7) are all arranged on the water supply pipeline (3), and the heat meter (5), the electric regulating valve (6) and the stop switch valve (7) are connected in sequence; The two ends of the water pump (8) are electrically connected to the output end of the electric regulating valve (6) and the input end of the one-way valve (9), respectively; the output end of the one-way valve (9) is connected to the output end of the stop switch valve (7) and connected to the heat-using end (2); The side pipeline (10) is connected between the water supply pipeline (3) and the return pipeline (4), and one end of the side pipeline (10) is connected to the input end of the heat meter (5); the bypass switch valve (11) is arranged on the side pipeline (10); The output end of the heat meter (5) is electrically connected to the input end of the control module (12), and the output end of the control module (12) is electrically connected to the input ends of the electric regulating valve (6), the stop switch valve (7), the water pump (8), the one-way valve (9) and the bypass switch valve (11), so as to control the opening and closing of the electric regulating valve (6), the stop switch valve (7), the water pump (8), the one-way valve (9) and the bypass switch valve (11).

2. The heating network control system for zone control according to claim 1, characterized in that: The control module (12) comprises a control unit (121), two switching units (122), a temperature control unit (123), a display unit (124) and a communication unit (125), wherein: The two adapter units (122) are both electrically connected to the control unit (121), the other end of one adapter unit (122) is electrically connected to the heat meter (5), and the other end of the other adapter unit (122) is electrically connected to the water pump (8); The output end of the temperature control unit (123) is electrically connected to the input end of the control unit (121) and is used to set the target value of the supply and return water temperature; The output end of the display unit (124) is electrically connected to the input end of the control unit (121) and is used to display the set supply and return water temperature target values; The communication unit (125) is electrically connected to the control unit (121), and the communication unit (125) is communicatively connected to the centralized heating dispatching platform, and is used to upload the heat collected by the heat meter (5) to the centralized heating dispatching platform.

3. The heating network control system for zone control according to claim 2, characterized in that: The adapter unit (122) comprises a chip U4, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and an end row J1, wherein pins 4 and 1 of the chip U4 are electrically connected to the control unit (121), pin 5 of the chip U4 is grounded, pin 8 of the chip U4 is connected to a power supply, pin 6 of the chip U4 is electrically connected to the resistor R3, the resistor R2, the capacitor C1, the capacitor C2 and the end row J1 respectively, the other end of the resistor R3 is grounded, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded, pin 7 of the chip U4 is electrically connected to the other end of the resistor R2, the resistor R1 and the end row J1 respectively, the other end of the resistor R1 is connected to a power supply, and the resistor R1 is also electrically connected to the capacitor C2.

4. The heating network control system for zone control according to claim 2, characterized in that: The temperature control unit (123) comprises a key switch SW2, a resistor R9, a key switch SW3, a resistor R10, a key switch SW4, a resistor R11, a key switch SW5 and a resistor R12, wherein one end of the key switch SW2, the key switch SW3, the key switch SW4 and the key switch SW5 are all electrically connected to the control unit (121), the other end of the key switch SW2 is electrically connected to the resistor R9, the other end of the key switch SW3 is electrically connected to the resistor R11, the other end of the key switch SW4 is electrically connected to the resistor R11, the other end of the key switch SW5 is electrically connected to the resistor R12, the other end of the resistor R9, the other end of the resistor R10, the other end of the resistor R11 and the other end of the resistor R12 are electrically connected and are commonly connected to a power supply.

5. The heating network control system for zone control according to claim 2, characterized in that: The display unit (124) comprises a power chip U2, a capacitor C8, a capacitor C9 and a display chip U3, wherein the power chip U2 is electrically connected to the control unit (121), the display chip U3 is electrically connected to the power chip U2, the power input terminals of the power chip U2 and the display chip U3 are electrically connected and are commonly connected to the power supply, the ground terminals of the power chip U2 and the display chip U3 are electrically connected and are commonly grounded, the two ends of the capacitor C8 are electrically connected to pin 4 and pin 5 of the power chip U2 respectively, and the two ends of the capacitor C9 are electrically connected to pin 1 and pin 3 of the power chip U2 respectively.

6. The heating network control system for zone control according to claim 2, characterized in that: The communication unit (125) comprises a chip U6, a resistor R13, a capacitor C11, a capacitor C10 and an antenna AE1, wherein a pin 39 of the chip U6 is electrically connected to the resistor R13 and the capacitor C11 respectively, the other end of the capacitor C11 is grounded, the other end of the resistor R13 is electrically connected to the capacitor C10 and the antenna AE1 respectively, the other end of the capacitor C10 is grounded, the chip U6 is electrically connected to the control unit (121), the power input end of the chip U6 is connected to the power supply, and the ground end of the chip U6 is grounded.

7. The heating network control system for zone control according to claim 6, characterized in that: The control module (12) further includes a reset unit (126), the reset unit (126) including a resistor R7, a resistor R8, a reset switch SW1 and a capacitor C5, wherein the negative electrodes of the resistor R7 and the capacitor C5 are electrically connected to one end of the resistor R8, and are electrically connected to the input end of the chip U6, the other end of the resistor R8 is grounded, the other end of the resistor R7 is electrically connected to one end of the reset switch SW1, the positive electrode of the capacitor C5 is electrically connected to the other end of the reset switch SW1, and are connected to a power supply.

8. The heating network control system for zone control according to claim 2, characterized in that: The control module (12) further comprises two pressure detection modules (127), the output ends of the two pressure detection modules (127) are electrically connected to the input end of the control unit (121), and the two pressure detection modules (127) are used to detect the water supply pressure and the return water pressure respectively.

9. The heating network control system for zone control according to claim 8, characterized in that: The pressure detection module (127) comprises a pressure sensor, an end row J2, a resistor R15, a capacitor C6 and a chip U5, wherein the pressure sensors are fixedly mounted on the water supply pipeline (3) and the water return pipeline (4), respectively; the output end of the pressure sensor is electrically connected to the end row J2; pin 3 of the end row J2 is connected to a power supply; pin 1 of the end row J2 is electrically connected to the capacitor C6, the resistor R15 and pin 2 of the chip U5, respectively; pin 2 of the end row J2 is electrically connected to the other end of the capacitor C6 and the other end of the resistor R2 and pin 4 of the chip U5, respectively, and are commonly grounded; pin 5 and pin 6 of the chip U5 are electrically connected and commonly connected to the input end of the control unit (121); and pin 8 of the chip U5 is connected to a power supply.

10. The heating network control system for zone control according to claim 2, characterized in that: The chip model of the control unit (121) is STM32F098RCYX.

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