Heat exchange unit for heat source

Abstract

The heat exchange unit comprises a heat exchanger, a control cabinet, a first-network circulating pump set module, a second-network circulating pump set module, a first-network heat metering device, a second-network flow meter, a first-network water supply main pipe, a first-network water return main pipe, a second-network water supply main pipe, a second-network water return main pipe and the like. The first-network water supply main pipe, the first-network water return main pipe, the second-network water supply main pipe and the second-network water return main pipe are all connected to the heat exchanger. The first-network circulating pump set module is installed on a first-network water supply main pipe, the second-network circulating pump set module is installed on a second-network water supply main pipe, and the first-network heat metering device, the second-network flow meter, the first-network circulating pump set module and the second-network circulating pump set module are all connected to the control cabinet. After the flow of first-network hot water is adjusted through the first-network circulating pump set module and the temperature sensor and the pressure sensor which are installed on the first-network water supply main pipe, the hot water provided by the first-network water supply main pipe exchanges heat with second-network circulating water which is pressurized by the second-network circulating pump set module in the heat exchanger, and first-network heat is transmitted to a second network. According to the utility model, the integration level is high, and the circulating water pumps are three circulating water pumps connected in parallel, so that the occupied space is greatly reduced while different requirements of users are met.

Description

Technical Field

[0001] The utility model relates to a heat exchange unit, in particular to a heat exchange unit which improves the integration of the heat exchange unit and reduces the space occupied, has a wide range of adaptability, and is used as a heat source to meet the requirements of different station buildings. Background Art

[0002] Under the general trend of global energy conservation and emission reduction, local governments, heating companies and equipment manufacturers are using special heat sources more and more widely, among which geothermal energy, air heat energy, sewage fermentation heat energy and other special heat sources are increasingly used. Most of the existing heat exchangers used in such special heat sources do not perform well, or the effect is not improved by making a small adjustment to the structure of the existing heat exchangers. Especially when the temperature of a network heat source varies greatly and the flow is unstable, the operating efficiency of the entire heat exchanger is low, the failure rate increases, and the energy consumption of the equipment remains high. Utility Model Content

[0003] In view of the above problems, the main purpose of the utility model is to provide a heat exchanger unit that improves the integration of the heat exchanger unit and reduces the space occupied. The unit has a wide range of adaptability and can be used as a heat source to meet the requirements of different stations.

[0004] The utility model solves the above technical problems through the following technical solutions: a heat exchange unit used for a heat source, the heat exchange unit used for the heat source comprising: a heat exchanger, a control cabinet, a first network circulation pump group module, a second network circulation pump group module, a first network heat metering device, a second network flow meter, a first network water supply main pipe, a first network return water main pipe, a second network water supply main pipe, and a second network return water main pipe.

[0005] The primary water supply main pipe, the primary water return main pipe, the secondary water supply main pipe and the secondary water return main pipe are all connected to the heat exchanger.

[0006] The first network circulation pump group module is installed on the first network water supply main, the second network circulation pump group module is installed on the second network water supply main, the first network heat metering device is installed on the first network return water main, and the second network flow meter is installed on the second network return water main.

[0007] The primary network heat metering device, the secondary network flow meter, the primary network circulation pump group module, and the secondary network circulation pump group module are all connected to the control cabinet.

[0008] The heat exchanger is an exchanger for the first network hot water and the second network cold water in the heat exchange process.

[0009] In a specific implementation example of the present utility model, after the hot water from one network passes through the first network circulation pump group module and the temperature sensor and pressure sensor installed on the first network water supply main to adjust the flow, the hot water provided by the first network water supply main exchanges heat with the second network circulation water pressurized by the second network circulation pump group module in the heat exchanger, thereby transferring the heat from the first network to the second network.

[0010] In a specific implementation example of the present utility model, the circulating water pumps in the first network circulating pump group module and the second network circulating pump group module both use three circulating water pumps in parallel, and each parallel circulating water pump is a water pump with the same head and different flow rate.

[0011] In a specific implementation example of the utility model, a one-network circulation pump group module includes a one-network circulation water pump, a one-network frequency converter, a one-network check valve, a one-network inlet butterfly valve and a one-network outlet butterfly valve. The one-network inlet butterfly valve and the one-network outlet butterfly valve are respectively located at the liquid inlet end and the liquid outlet end of the one-network circulation water pump. The one-network check valve is located on the pipeline between the one-network circulation water pump and the one-network inlet butterfly valve; the one-network frequency converter and the one-network circulation water pump are integrated together.

[0012] In a specific implementation example of the utility model, the two-network circulation pump group module includes a two-network circulation water pump, a two-network frequency converter, a two-network check valve, a two-network inlet butterfly valve and a two-network outlet butterfly valve. The two-network inlet butterfly valve and the two-network outlet butterfly valve are respectively located at the liquid inlet end and the liquid outlet end of the two-network circulation water pump. The two-network check valve is located on the pipeline between the two-network circulation water pump and the two-network inlet butterfly valve; the two-network frequency converter and the two-network circulation water pump are integrated together.

[0013] In a specific implementation example of the utility model, the heat exchanger unit used by the heat source also includes a water replenishment module, which is a water replenishment module for replenishing the water lost by the second network system due to leakage and maintaining a constant pressure in the second network system. The water replenishment module includes a water replenishment pump, a frequency converter, a water replenishment pipeline, a No. 1 solenoid valve, and a No. 2 solenoid valve. One end of the water replenishment pipeline is connected to the first network return water main pipe, and the other end is connected to the second network return water main pipe. The water replenishment pump and the frequency converter are integrated together. The water replenishment pump is installed on the water replenishment pipeline. The No. 1 solenoid valve and the No. 2 solenoid valve are connected in series, and the No. 1 solenoid valve and the water replenishment pump are connected in parallel. A check valve and a ball valve are also provided on the pipeline where the No. 1 solenoid valve is installed, and a check valve and a ball valve are also provided on the pipeline where the water replenishment pump is installed.

[0014] The positive progress of the utility model is that the heat exchange unit used for the heat source provided by the utility model has the following advantages compared with the common technology: the heat exchange module, the circulation pump module and the water supply module are connected through pipelines, realizing the modular integrated design of the heat exchange unit, which greatly reduces the occupied space while meeting the different needs of users. Due to the use of the one-network circulation pump module, the controllability of the flow and temperature of the one-network is significantly improved, so that during the operation of the unit, the changes in the temperature and flow of the one-network have less impact on the temperature changes and hydraulic balance of the second network. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 for Figure 1 Enlarged view of point A.

[0017] Figure 3 for Figure 1 This is an enlarged view of point B.

[0018] The following are the names corresponding to the label numbers in this utility model:

[0019] Heat metering device of network 1, circulating pump group module of network 1, heat exchanger 4, water supply pipeline 5, solenoid valve No. 1 8, water supply pump 9, solenoid valve No. 2 15, circulating pump group module of network 2 17, flow meter of network 2 2, return water main pipe of network 2 2, water supply main pipe of network 2 2, control cabinet 23, water supply main pipe of network 1 24, return water main pipe of network 1 25, frequency converter 9-1, circulating water pump of network 1 2-1, frequency converter of network 1 2-2, check valve of network 1 2-3, inlet butterfly valve of network 1 2-4, outlet butterfly valve of network 1 2-5, circulating water pump of network 2 17-1, frequency converter of network 2 17-2, check valve of network 2 17-3, inlet butterfly valve of network 2 17-4, outlet butterfly valve of network 2 17-5. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 2 for Figure 1 A magnified image of Figure 3 for Figure 1 This is an enlarged view of point B. Figure 1-3As shown: The utility model proposes a heat exchanger unit used for a heat source, which includes: a heat exchanger 4, a control cabinet 23, a first network circulation pump group module 2, a second network circulation pump group module 17, a first network heat metering device 1, a second network flow meter 20, a first network water supply main pipe 24, a first network return water main pipe 25, a second network water supply main pipe 21, and a second network return water main pipe 22.

[0022] The first network water supply main 24, the first network return water main 25, the second network water supply main 21, and the second network return water main 22 are all connected to the heat exchanger 4; the first network circulation pump group module 2 is installed on the first network water supply main 24, the second network circulation pump group module 17 is installed on the second network water supply main 21, the first network heat metering device 1 is installed on the first network return water main 25, and the second network flow meter 20 is installed on the second network return water main 22; the first network heat metering device 1, the second network flow meter 20, the first network circulation pump group module 2, and the second network circulation pump group module 17 are all connected to the control cabinet 23; the heat exchanger 4 is an exchanger for the first network hot water and the second network cold water in the heat exchange process.

[0023] After the hot water of the first network passes through the first network circulation pump group module 2 and the temperature sensor and pressure sensor installed on the first network water supply main 24 to adjust the flow, the hot water provided by the first network water supply main 24 exchanges heat with the second network circulating water pressurized by the second network circulation pump group module 17 in the heat exchanger 4, and the heat of the first network is transferred to the second network.

[0024] The one-network circulating pump group module 2 includes a one-network circulating water pump 2-1, a one-network frequency converter 2-2, a one-network check valve 2-3, a one-network inlet butterfly valve 2-4 and a one-network outlet butterfly valve 2-5. The one-network inlet butterfly valve 2-4 and the one-network outlet butterfly valve 2-5 are respectively located at the liquid inlet end and the liquid outlet end of the one-network circulating water pump 2-1. The one-network check valve 2-3 is located on the pipeline between the one-network circulating water pump 2-1 and the one-network inlet butterfly valve 2-4; the one-network frequency converter 2-2 and the one-network circulating water pump 2-1 are integrated together, and participate in Figure 3 .

[0025] The circulating water pumps in the first network circulating pump group module and the second network circulating pump group module both use three circulating water pumps connected in parallel, and each of the parallel circulating water pumps is a water pump with the same head and different flow rates.

[0026] The circulating water pump 2-1 of the first network adjusts the pressure of the circulating water of the first network appropriately according to the data provided by the temperature sensor and pressure sensor on the water supply pipe 24 of the first network and the operating temperature of the second network. The circulating water pump 2-1 adopts the parallel connection of large, medium and small pumps, and the head of each pump is similar. The flow rate of a single pump is configured at 70%, 50% and 30% of the total circulating flow rate respectively to meet the variable flow operation requirements of the system, improve the problem of low efficiency of the water pump under low load and improve the operation efficiency of the water pump. The circulating water pump 2-1 of the first network is all fully variable frequency controlled, and the circulating water pump 21 and the frequency converter 22 adopt an integrated design, which is more compact. The frequency conversion and addition and subtraction pump of the circulating water pump 2-1 of the first network are controlled by comparing the pressure sensor and temperature sensor set on the water supply main pipe 24 of the first network and the temperature sensor on the water supply main pipe 22 of the second network with the set value in the control cabinet 23.

[0027] After the flow of hot water from the first network is adjusted by the first network circulation pump group module 2 and the temperature sensor and pressure sensor, the first network water supply main pipe 24 exchanges heat with the second network circulation water after pressurization by the second network circulation pump group module 17 in the heat exchanger 4, and transfers the heat from the first network to the second network. The first network heat metering device 1 collects the parameters such as the cumulative flow, cumulative heat, instantaneous heat, and instantaneous flow of hot water from the first network in real time, and the second network flow meter 20 collects the cumulative flow and instantaneous flow of the second network circulation water in real time. The first network circulation pump group module matches the operation of different water pumps according to the outdoor temperature, the flow of the first network and the water temperature of the heat source, changes the flow of hot water from the first network, and stabilizes the water supply temperature of the second network circulation water in the second network water supply main pipe 22.

[0028] The two-net circulation pump group module 17 in the utility model includes a two-net circulation water pump 17-1, a two-net frequency converter 17-2, a two-net check valve 17-3, a two-net inlet butterfly valve 17-4 and a two-net outlet butterfly valve 17-5. The two-net inlet butterfly valve 17-4 and the two-net outlet butterfly valve 17-5 are respectively located at the liquid inlet end and the liquid outlet end of the two-net circulation water pump 17-1. The two-net check valve 17-3 is located on the pipeline between the two-net circulation water pump 17-1 and the two-net inlet butterfly valve 17-4; the two-net frequency converter 17-2 and the two-net circulation water pump 17-1 are integrated together, and the two-net frequency converter 17-2 and the two-net circulation water pump 17-1 are integrated together. Figure 2 .

[0029] The circulating water pump 17-1 pressurizes the circulating water of the second network to overcome the circulation resistance of the second network system and provide a suitable flow to meet the normal heating of the most unfavorable end of the second network. The second network circulating water pump 17-1 adopts a parallel connection of large, medium and small pumps. The head of each pump is similar. The flow of a single pump is configured at 70%, 50% and 30% of the total circulation flow respectively to meet the variable flow operation requirements of the system, improve the problem of low efficiency of the water pump under low load, and improve the operation efficiency of the water pump. The second network circulating water pump 17-1 is all fully variable frequency controlled. The second network circulating water pump 17-1 and the second network inverter 17-2 adopt an integrated design, which is more compact. The frequency conversion and addition and subtraction pump of the second network circulating water pump 17-1 are controlled by the pressure difference of the pressure sensors set on the second network water supply main pipe 21 and the second network return water main pipe 22.

[0030] The heat exchange unit used for the heat source proposed in the utility model also includes a water replenishment module, which includes a water replenishment pump 9, a frequency converter 9-1, a water replenishment pipeline 5, a No. 1 solenoid valve 8, and a No. 2 solenoid valve 15. One end of the water replenishment pipeline 5 is connected to a first network return water main pipe 25, and the other end is connected to a second network return water main pipe 22. The water replenishment pump 9 and the frequency converter 9-1 are integrated together. The water replenishment pump 9 is installed on the water replenishment pipeline 5. The No. 1 solenoid valve and the No. 2 solenoid valve are connected in series. The No. 1 solenoid valve 8 and the water replenishment pump 9 are connected in parallel. A check valve and a ball valve are also provided on the pipeline where the No. 1 solenoid valve 8 is installed, and a check valve and a ball valve are also provided on the pipeline where the water replenishment pump 9 is installed.

[0031] The water replenishment module controls the start and frequency conversion operation of the water replenishment pump 9 through the pressure signal of the pressure sensor installed on the second network return water main pipe 21, replenishes the water lost by the second network system due to leakage, and maintains the pressure of the second network system constant. The No. 1 solenoid valve and the No. 2 solenoid valve are designed in series, and the start and stop are controlled by the pressure sensors installed on the second network water supply pipeline 22 and the first network water supply pipeline 24.

[0032] The utility model improves the flexibility of on-site installation of the heat exchanger unit, and each module can be installed separately or as a whole according to the on-site conditions of the heat exchange station; it adopts a mechatronics design to reduce the floor space of the unit; at the same time, the invention simultaneously regulates the operation of the first and second networks to achieve stable operation of the heat exchanger unit.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A heat exchange unit used as a heat source, characterized in that: The heat exchange unit used in the heat source includes: a heat exchanger, a control cabinet, a first network circulation pump group module, a second network circulation pump group module, a first network heat metering device, a second network flow meter, a first network water supply main pipe, a first network return water main pipe, a second network water supply main pipe, and a second network return water main pipe; The primary water supply main pipe, the primary water return main pipe, the secondary water supply main pipe, and the secondary water return main pipe are all connected to the heat exchanger; The first network circulation pump module is installed on the first network water supply main, the second network circulation pump module is installed on the second network water supply main, the first network heat metering device is installed on the first network return water main, and the second network flow meter is installed on the second network return water main; The heat metering device of the first network, the flow meter of the second network, the circulation pump module of the first network, and the circulation pump module of the second network are all connected to the control cabinet; The heat exchanger is an exchanger for the first network hot water and the second network cold water in the heat exchange process.

2. The heat exchange unit used as the heat source according to claim 1, characterized in that: After the hot water from the first network passes through the first network circulation pump group module and the temperature sensor and pressure sensor installed on the first network water supply main to adjust the flow, the hot water provided by the first network water supply main exchanges heat with the second network circulating water pressurized by the second network circulation pump group module in the heat exchanger, transferring the heat from the first network to the second network.

3. The heat exchange unit used as the heat source according to claim 1, characterized in that: The circulating water pumps in the first network circulating pump group module and the second network circulating pump group module both use three circulating water pumps connected in parallel, and each of the parallel circulating water pumps is a water pump with the same head and different flow rates.

4. The heat exchange unit used as the heat source according to claim 1 or 3, characterized in that: The one-net circulation pump group module includes a one-net circulation water pump, a one-net frequency converter, a one-net check valve, a one-net inlet butterfly valve and a one-net outlet butterfly valve. The one-net inlet butterfly valve and the one-net outlet butterfly valve are respectively located at the liquid inlet end and the liquid outlet end of the one-net circulation water pump. The one-net check valve is located on the pipeline between the one-net circulation water pump and the one-net inlet butterfly valve; the one-net frequency converter and the one-net circulation water pump are integrated together.

5. The heat exchange unit used for the heat source according to claim 1 or 3, characterized in that: The two-network circulation pump group module includes a two-network circulation water pump, a two-network frequency converter, a two-network check valve, a two-network inlet butterfly valve and a two-network outlet butterfly valve. The two-network inlet butterfly valve and the two-network outlet butterfly valve are respectively located at the liquid inlet end and the liquid outlet end of the two-network circulation water pump. The two-network check valve is located on the pipeline between the two-network circulation water pump and the two-network inlet butterfly valve; the two-network frequency converter and the two-network circulation water pump are integrated together.

6. The heat exchange unit used as a heat source according to claim 1, characterized in that: The heat exchanger unit used by the heat source also includes a water replenishment module, which is used to replenish the water lost by the second network system due to leakage and maintain a constant pressure in the second network system. The water replenishment module includes a water replenishment pump, a frequency converter, a water replenishment pipeline, a No. 1 solenoid valve, and a No. 2 solenoid valve. One end of the water replenishment pipeline is connected to the first network return water main pipe, and the other end is connected to the second network return water main pipe. The water replenishment pump and the frequency converter are integrated together. The water replenishment pump is installed on the water replenishment pipeline. The No. 1 solenoid valve and the No. 2 solenoid valve are connected in series, and the No. 1 solenoid valve and the water replenishment pump are connected in parallel. A check valve and a ball valve are also provided on the pipeline where the No. 1 solenoid valve is installed, and a check valve and a ball valve are also provided on the pipeline where the water replenishment pump is installed.

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