Building type heat exchange unit for distributed heat supply system

Abstract

The utility model discloses a building type heat exchange unit for a distributed heat supply system, which comprises a unit frame, a make-up pump is fixedly arranged on the inner side of the unit frame, a plate heat exchanger is arranged above the make-up pump, two conveying pipelines are arranged between the plate heat exchanger and the make-up pump, and the two conveying pipelines are communicated with the make-up pump. One conveying pipeline is a cold water pipeline, and the other conveying pipeline is a hot water pipeline; a scaling monitoring unit is mounted on one side of the plate heat exchanger and comprises a conical mounting cover, the plate heat exchanger is fixedly connected with the conical mounting cover, a sealing positioning seat is fixedly mounted on the inner side of the conical mounting cover, and a mounting frame is mounted on one side of the sealing positioning seat. And a plurality of mounting sleeves are mounted on the inner side of the mounting frame. According to the utility model, heat exchange is carried out on hydrothermal circulation in the heat exchange unit for the building, so that the heat exchange efficiency can be effectively improved, and the scaling amount of the inner wall of the pipeline can be conveniently monitored.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, specifically a building-type heat exchanger unit for distributed heating systems. Background Technology

[0002] The core component of a building heat exchanger unit is the heat exchanger, which works by transferring some of the heat from a hot fluid to a cold fluid to meet the temperature requirements of different fluids in a process. Heat transfer occurs through three methods: heat transfer, heat convection, and heat radiation.

[0003] The traditional mode of centralized heat exchange in existing heat exchange stations requires the laying of long-distance heating pipelines, which is costly. Traditional systems require the construction of long-distance heating pipelines (usually more than 1 kilometer), and the initial investment accounts for more than 60% of the total system cost. As the number of heating terminals increases, the original pipelines need to be frequently modified due to problems such as hydraulic imbalance and pressure decay. New heat exchange stations require the construction of supporting pump stations, valves and regulating devices, resulting in an exponential increase in expansion costs.

[0004] Furthermore, during the distribution process, high-temperature hot water undergoes complex physicochemical reactions with the inner walls of the pipes, forming deposits such as calcium carbonate and magnesium hydroxide. Experimental data shows that for every 1 mm increase in scale thickness, heat transfer efficiency decreases by approximately 40%, and localized corrosion or pipe blockage may occur, shortening equipment lifespan. Existing systems lack the technical means to monitor scale levels in real time, and maintenance cycles can only be set based on experience, posing a significant risk of energy efficiency degradation. Therefore, these systems do not meet current requirements. To address this, we propose a building-type heat exchanger unit for distributed heating systems. Utility Model Content

[0005] The purpose of this utility model is to provide a building-type heat exchanger unit for distributed heating systems, in order to solve the problems mentioned in the background art, such as the need to lay long-distance heating pipelines, high cost, inability to meet the needs of the original pipeline design as the number of heat exchange terminals increases, high cost of adding new ones, uncertain heat exchange efficiency, and difficulty in monitoring the amount of scale on the inner wall of the pipeline during the heat exchange process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a building-type heat exchanger unit for a distributed heating system, comprising a unit frame, wherein a water supply pump and a circulation pump are fixedly installed on the inner side of the unit frame, and two conveying pipelines are provided between the plate heat exchanger and the heat exchanger unit, wherein one of the conveying pipelines is a cold water pipeline and the other conveying pipeline is a hot water pipeline.

[0007] A scaling monitoring unit is installed on one side of the plate heat exchanger. The scaling monitoring unit includes a conical mounting cover. The plate heat exchanger is fixedly connected to the conical mounting cover. A sealing positioning seat is fixedly installed on the inner side of the conical mounting cover. A mounting bracket is installed on one side of the sealing positioning seat. Multiple mounting sleeves are installed on the inner side of the mounting bracket. A distance measuring probe is installed on the inner side of the mounting sleeve. A flow guide hole is provided at one end of the mounting sleeve. A heat insulation strip is installed on one side of the mounting bracket.

[0008] A unit cabinet is fixedly installed on the outside of the unit frame. A maintenance plate is fixedly installed on the front end of the unit cabinet. A primary water supply end and a primary water return end are installed on the lower part of one side of the unit cabinet. The primary water return end is located behind the primary water supply end. A secondary water supply end and a secondary water return end are installed on the other side of the unit cabinet. The secondary water supply end is located behind the secondary water return end.

[0009] The primary water supply end is the hot side inlet, the primary water return end is the hot side outlet, the secondary water supply end is the cold side outlet, the secondary water return end is the cold side inlet, the secondary water supply end and the secondary water return end are connected by a cold water pipeline, and a drain end is installed in the middle of the cold water pipeline.

[0010] The water supply pump is connected to the secondary return water end, and the primary water supply end and the primary return water end are connected to the interior of the plate heat exchanger through hot water pipes. The interior of the plate heat exchanger is filled with heat exchange medium.

[0011] The plate heat exchanger is internally connected to the conical mounting cover. One end of each of the multiple ranging probes passes through the mounting frame and the insulation strip and is inserted into the interior of the conical mounting cover. The mounting frame and the multiple ranging probes are fixedly connected by a mounting sleeve. The mounting sleeve is made of transparent glass, and the ranging probe is a ranging sensor.

[0012] A shock-absorbing pad is provided between the mounting bracket and the thermal insulation strip. The thermal insulation strip and the sealing positioning seat are fixedly connected by the mounting bracket. A sealing gasket is provided between the thermal insulation strip and the conical mounting cover.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses a water pump to deliver cold water through a cold water pipeline, ensuring stable and uniform contact with the surface of a plate heat exchanger. The plate heat exchanger then exchanges heat between the heat exchange medium and the cold water. The heated cold water is then output through a secondary water supply end, and the cooled heat exchange medium is output through a primary return end. By circulating heat exchange between the heat exchange medium and the cold water through the primary water supply end, primary return end, secondary water supply end, and secondary return end, the cold water can be heated, effectively improving the heat exchange efficiency.

[0015] 2. This utility model allows one end of the mounting sleeve to continuously contact the heat exchange medium during heat exchange. A flow guide hole is provided at one end of the mounting sleeve, guiding the heat exchange medium flowing inside the plate heat exchanger. As the heat exchange medium continues to flow, it passes through the inner wall of the flow guide hole and forms scale. The mounting sleeve is made of transparent glass, allowing a ranging probe to detect the thickness of the scale on the inner wall of the flow guide hole. This enables the measurement of the amount of scale generated during the operation of the plate heat exchanger, allowing for timely treatment, thereby reducing downtime maintenance, extending equipment lifespan, and improving overall energy efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the unit frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the installation structure of the plate heat exchanger of this utility model;

[0019] Figure 4 This is a schematic diagram of the installation structure of the conveying pipeline of this utility model;

[0020] Figure 5 This is a partial cross-sectional structural diagram of the plate heat exchanger of this utility model.

[0021] In the diagram: 1. Plate heat exchanger; 2. Primary water supply end; 3. Primary water return end; 4. Secondary water supply end; 5. Secondary water return end; 6. Make-up water pump; 7. Sewage discharge end; 8. Inspection plate; 9. Unit frame; 10. Unit cabinet; 11. Scaling monitoring unit; 12. Conical mounting cover; 13. Sealing positioning seat; 14. Mounting bracket; 15. Thermal insulation strip; 16. Mounting sleeve; 17. Distance measuring probe; 18. Flow guide hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] The water pump 6 (model MDZ-20-180) mentioned in this utility model can be obtained from the market or through private customization.

[0024] Please see Figures 1 to 4This utility model provides an embodiment of a building-type heat exchanger unit for a distributed heating system, including a unit frame 9, a water supply pump 6 fixedly installed on the inner side of the unit frame 9, a plate heat exchanger 1 installed above the water supply pump 6, a unit cabinet 10 fixedly installed on the outer side of the unit frame 9, a maintenance plate 8 fixedly installed on the front end face of the unit cabinet 10, a primary water supply end 2 and a primary water return end 3 installed on the lower part of one side of the unit cabinet 10, the primary water return end 3 being located behind the primary water supply end 2, a secondary water supply end 4 and a secondary water return end 5 installed on the other side of the unit cabinet 10, the secondary water supply end 4 being located behind the secondary water return end 5, the primary water supply end 2 being the hot side inlet, and by performing multiple circulation heat exchange between the heat exchange medium and cold water through the primary water supply end 2, the primary water return end 3, the secondary water supply end 4 and the secondary water return end 5, the cold water can be heated.

[0025] Two delivery pipelines are provided between the plate heat exchanger 1 and the makeup water pump 6. One delivery pipeline is a cold water pipeline, and the other is a hot water pipeline. The primary return water end 3 is the hot side outlet, the secondary supply water end 4 is the cold side outlet, and the secondary return water end 5 is the cold side inlet. The secondary supply water end 4 and the secondary return water end 5 are connected by a cold water pipeline. A drain end 7 is installed in the middle of the cold water pipeline. The input and output ends of the makeup water pump 6 are respectively connected to the secondary return water end 5 and the secondary supply water end 4. Water end 2 and primary return water end 3 are connected to the interior of plate heat exchanger 1 through hot water pipes. The interior of plate heat exchanger 1 is filled with heat exchange medium, which allows the water supply pump 6 to deliver cold water through cold water pipes and make stable and uniform contact with the surface of plate heat exchanger 1. Thus, heat exchange can be performed between the heat exchange medium and cold water through plate heat exchanger 1. Then, the heated cold water is output through secondary water supply end 4, and the cooled heat exchange medium is output through primary return water end 3.

[0026] Please see Figure 2 and Figure 5 A scaling monitoring unit 11 is installed on one side of the plate heat exchanger 1. The scaling monitoring unit 11 includes a conical mounting cover 12. The plate heat exchanger 1 is internally connected to the conical mounting cover 12. The plate heat exchanger 1 is fixedly connected to the conical mounting cover 12. A sealing positioning seat 13 is fixedly installed on the inner side of the conical mounting cover 12. A mounting bracket 14 is installed on one side of the sealing positioning seat 13. Multiple mounting sleeves 16 are installed on the inner side of the mounting bracket 14. A ranging probe 17 is installed on the inner side of the mounting sleeve 16. The mounting bracket 14 and the multiple ranging probes 17 are fixedly connected through the mounting sleeves 16. The mounting sleeves 16 are made of transparent glass. The ranging probes 17 are ranging sensors. One end of the mounting sleeve 16 is provided with a flow guide hole 18. The heat exchange medium flowing inside the plate heat exchanger 1 can be guided through the flow guide hole 18. The ranging probes 17 can detect the scaling thickness on the inner wall of the flow guide hole 18 through the mounting sleeve 16.

[0027] A heat insulation strip 15 is installed on one side of the mounting bracket 14. A shock-absorbing pad is provided between the mounting bracket 14 and the heat insulation strip 15. One end of multiple ranging probes 17 passes through the mounting bracket 14 and the heat insulation strip 15 and is inserted into the interior of the conical mounting cover 12. The heat insulation strip 15 and the sealing positioning seat 13 are fixedly connected through the mounting bracket 14. A sealing gasket is provided between the heat insulation strip 15 and the conical mounting cover 12. The heat exchange medium can be sealed and insulated by the sealing positioning seat 13 and the conical mounting cover 12, so as to maintain the sealing stability of the plate heat exchanger 1 in the heat exchange medium delivery.

[0028] The above-described structure eliminates the need for long-distance main pipelines, directly integrating the heat exchange unit within the building or adjacent areas. Direct heating via distributed heat sources (such as gas boilers, heat pumps, or industrial waste heat) reduces the number of heat medium transport links, effectively improving system speed. During operation, when heating the building, cold water and hot water pipelines are installed inside the unit frame 9. Cold water is input to the cold water pipeline through the secondary return water end 5, and high-temperature heat exchange medium is input to the hot water pipeline through the primary supply water end 2. The primary supply water end 2 and the primary return water end 3 are internally connected via the plate heat exchanger 1, and the secondary supply water end 4 and the secondary return water end 5 are connected via a makeup water pump 6.

[0029] When the power is turned on, the water supply pump 6 is started, so that the water supply pump 6 can deliver cold water through the cold water pipeline and make stable and uniform contact with the surface of the plate heat exchanger 1. Then, the plate heat exchanger 1 can exchange heat between the heat exchange medium and the cold water. Then, the cold water after heat exchange and heating is output through the secondary water supply end 4, and the heat exchange medium after cooling is output through the primary return water end 3. By circulating heat exchange between the heat exchange medium and the cold water through the primary water supply end 2, the primary return water end 3, the secondary water supply end 4, and the secondary return water end 5, the heating operation of the cold water can be achieved.

[0030] A scaling monitoring unit 11 is installed on one side of the plate heat exchanger 1. One end of multiple mounting sleeves 16 passes through the mounting frame 14 and the insulation strip 15 and is inserted into the interior of the conical mounting cover 12, so that one end of the mounting sleeve 16 can be in continuous contact with the heat exchange medium during heat exchange. A flow guide hole 18 is provided at one end of the mounting sleeve 16, so that the heat exchange medium flowing inside the plate heat exchanger 1 can be guided through the flow guide hole 18. As the heat exchange medium flows continuously, it passes through the inner wall of the flow guide hole 18 and scale forms. The mounting sleeve 16 is made of transparent glass, so that the ranging probe 17 can detect the scale thickness on the inner wall of the flow guide hole 18 through the mounting sleeve 16, thereby realizing the measurement of the amount of scale generated by the plate heat exchanger 1 during operation. When scaling is detected, the fluid flow direction can be switched (such as from forward flow to reverse flow) to use the momentum of the fluid to flush the scale layer attached to the pipe wall. When the flow is reversed, the scale layer loosens and falls off due to the sudden change in the direction of force. The scale prevention effect can be further enhanced by artificially increasing the turbulence of the fluid by changing the pipe structure (such as corrugated pipes or spiral fins) or increasing the flow rate, thereby reducing downtime maintenance, extending equipment life, and improving overall energy efficiency.

[0031] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0032] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A building heat exchanger unit for a distributed heating system, comprising a unit frame (9), characterized in that: The inner side of the unit frame (9) is fixedly installed with a makeup water pump (6), the upper side of the makeup water pump (6) is installed with a plate heat exchanger (1), two delivery pipelines are arranged between the plate heat exchanger (1) and the makeup water pump (6), one of the delivery pipelines is a cold water pipeline, and the other delivery pipeline is a hot water pipeline; one side of the plate heat exchanger (1) is installed with a fouling monitoring unit (11), the fouling monitoring unit (11) comprises a conical mounting cover (12), the plate heat exchanger (1) is fixedly connected with the conical mounting cover (12), the inner side of the conical mounting cover (12) is fixedly installed with a sealing positioning seat (13), one side of the sealing positioning seat (13) is installed with a mounting rack (14), the inner side of the mounting rack (14) is installed with a plurality of mounting sleeves (16), the inner side of the mounting sleeve (16) is installed with a distance measuring probe (17), one end of the mounting sleeve (16) is provided with a flow guide hole (18), and one side of the mounting rack (14) is installed with a temperature insulation strip (15).

2. A building heat exchanger unit for a distributed heating system according to claim 1, characterized in that: The outer side of the unit frame (9) is fixedly installed with a unit cabinet body (10), the front end face of the unit cabinet body (10) is fixedly installed with an inspection plate (8), the lower part of one side of the unit cabinet body (10) is installed with a primary water supply end (2) and a primary water return end (3), the primary water return end (3) is located at the rear of the primary water supply end (2), the other side of the unit cabinet body (10) is installed with a secondary water supply end (4) and a secondary water return end (5), and the secondary water supply end (4) is located at the rear of the secondary water return end (5).

3. A building heat exchanger unit for a distributed heating system according to claim 2, characterized in that: The primary water supply end (2) is a hot side inlet, the primary water return end (3) is a hot side outlet, the secondary water supply end (4) is a cold side outlet, the secondary water return end (5) is a cold side inlet, the secondary water supply end (4) and the secondary water return end (5) are connected through a cold water pipeline, and a blowdown end (7) is installed in the middle of the cold water pipeline.

4. The building heat exchanger unit for a distributed heating system according to claim 1, wherein: The input end and the output end of the makeup water pump (6) are respectively through-connected with the secondary water return end (5) and the secondary water supply end (4), the primary water supply end (2) and the primary water return end (3) are through-connected with the inside of the plate heat exchanger (1) through a hot water pipeline, and the inside of the plate heat exchanger (1) is filled with a heat exchange medium.

5. The building heat exchanger unit for a distributed heating system according to claim 1, wherein: The plate heat exchanger (1) is through-connected with the inside of the conical mounting cover (12), one end of the plurality of distance measuring probes (17) penetrates through the mounting rack (14) and the temperature insulation strip (15) and is inserted into the inside of the conical mounting cover (12), the mounting rack (14) and the plurality of distance measuring probes (17) are fixedly connected through the mounting sleeve (16), the material of the mounting sleeve (16) is transparent glass, and the distance measuring probe (17) is a distance measuring sensor.

6. A building heat exchanger unit for a distributed heating system according to claim 5, characterized in that: A damping pad is arranged between the mounting rack (14) and the temperature insulation strip (15), the temperature insulation strip (15) is fixedly connected with the sealing positioning seat (13) through the mounting rack (14), and a sealing pad is arranged between the temperature insulation strip (15) and the conical mounting cover (12).

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