Differential pressure steam driven heat source pack unit

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By designing a differential pressure steam-driven heat source unit, the problems of large size and high cost of traditional dual-heat source units are solved, achieving unit compactness and cost reduction, while adapting to stable operation under various working conditions.

CN224498807UActive Publication Date: 2026-07-14SICHUAN PROVINCE XIWANGSHENLAN AIR-CONDITION MFG CO L

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SICHUAN PROVINCE XIWANGSHENLAN AIR-CONDITION MFG CO L
Filing Date: 2025-08-13
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Traditional dual-heat-source lithium bromide absorption chiller units are bulky and costly, and their heat exchange area is wasted in single-heat-source mode.

Method used

The differential pressure steam-driven heat source unit uses high-pressure and low-pressure steam heat source components connected in parallel to enter the detection unit. After mixing, it outputs steam at a specific pressure and flow rate as a heat source, adapting to control and regulation in dual-heat source or single-heat source modes.

Benefits of technology

It effectively reduces the heat exchange area of the unit, decreases its size, lowers production costs, and avoids the waste of heat exchange area in single heat source mode, ensuring stable system operation.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224498807U_ABST

Patent Text Reader

Abstract

The utility model discloses a kind of difference pressure steam drive heat source group unit, by high-pressure steam heat source assembly, low-pressure steam heat source assembly, detection unit composition.The utility model is introduced by driving heat source group unit, and difference pressure steam is converted after being handled, and enter the generator of lithium bromide absorption refrigerator as working heat source, the high-pressure steam heat source assembly is used for the detection control of high-pressure steam heat source state, the low-pressure steam heat source assembly is used for the detection control of low-pressure steam heat source state, the detection unit is used for the detection of mixed steam state.The utility model, by heat source group influx mode control, analysis collaborative control difference pressure steam intake matching degree, ensure normal and stable operation of system, effectively reduce the heat exchange area of unit generator, and improve its utilization rate, compared with traditional double heat source lithium bromide absorption refrigerator, smaller, lower cost.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The differential pressure steam driven heat source unit described in this utility model relates to the technical field of lithium bromide absorption refrigeration equipment, and is particularly suitable for application scenarios of differential pressure steam dual heat source units. Background Technology

[0002] With the continuous optimization of the global energy structure and the increasing awareness of environmental protection, lithium bromide absorption chillers, as a highly efficient and environmentally friendly refrigeration device, have been widely used. They are particularly useful in industries such as chemical, pharmaceutical, and power, providing stable and reliable cooling. Simultaneously, they can recover and utilize various waste heat resources, such as steam, flue gas, and hot water, helping to reduce production costs and improve efficiency. For applications with dual steam heat sources, traditional structures either use two heat sources connected to the same generator via independent pipelines, or two heat sources connected to two separate generators. Both of these dual-heat-source unit structures have large heat exchange areas, resulting in bulky units and increased costs. Furthermore, when operating in single-heat-source mode, the other heat exchange area remains idle, leading to waste. Summary of the Invention

[0003] To address the issues of bulky size, increased cost, and wasteful use of dual-heat-source units, this utility model discloses a differential pressure steam-driven heat-source unit.

[0004] The differential pressure steam-driven heat source unit of this invention comprises a high-pressure steam heat source assembly 11, a low-pressure steam heat source assembly 12, and a detection unit 13. The differential pressure steam heat source 4 is connected to the input terminal of the driving heat source unit 1, wherein the high-pressure steam heat source 41 enters the input terminal of the high-pressure steam heat source assembly 11, and the low-pressure steam heat source 42 enters the input terminal of the low-pressure steam heat source assembly 12. The output terminals of the high-pressure steam heat source assembly 11 and the low-pressure steam heat source assembly 12 are connected in parallel to the input terminal of the detection unit 13. The output terminal of the detection unit 13 is connected to the generator 2 of the lithium bromide absorption chiller.

[0005] The high-pressure steam heat source assembly 11 of the differential pressure steam driven heat source unit of this utility model consists of a high-pressure electric valve 111, a high-pressure pressure sensor 112, and a high-pressure temperature sensor 113. After being detected and processed by the high-pressure steam heat source assembly 11, the high-pressure steam heat source 41 outputs steam with a specific pressure and flow rate to the input terminal of the detection unit 13.

[0006] The low-pressure steam heat source assembly 12 of the differential pressure steam driven heat source unit of this invention consists of a low-pressure electric valve 121, a low-pressure pressure sensor 122, and a low-pressure temperature sensor 123. After being detected and processed by the low-pressure steam heat source assembly 12, the low-pressure steam heat source 42 outputs steam at a specific pressure and flow rate to the input terminal of the detection unit 13.

[0007] The detection unit 13 of the differential pressure steam-driven heat source unit of this invention consists of a mixing pressure sensor 131 and a mixing temperature sensor 132. The detection unit 13 is used to detect the pressure and temperature status of the mixed steam.

[0008] The differential pressure steam-driven heat source unit of this utility model is adapted to the following working conditions: when using dual heat sources, it is adapted to both high-pressure steam heat source component (11) and low-pressure steam heat source component (12); when using a single heat source, the high-pressure heat source is adapted to the high-pressure steam heat source component (11) and the low-pressure heat source is adapted to the low-pressure steam heat source component (12), including the following steps.

[0009] In the dual heat source mode, the low-pressure steam heat source 42 is used first. After the unit starts, the low-pressure steam heat source component 12 controls and adjusts the generator's outlet temperature 9. When the low-pressure steam heat source 42 cannot meet the cooling demand, the high-pressure steam heat source 41 is used to supplement it. The high-pressure steam heat source component 11 participates in controlling and adjusting the generator's outlet temperature 9, while the low-pressure steam heat source component 12 tracks the pressure P before the low-pressure electric valve. The differential pressure steam intake matching degree is controlled collaboratively through system analysis.

[0010] In the high-pressure heat source mode, the high-pressure steam heat source component 11 tracks and controls the generator's outlet temperature 9, while the low-pressure steam heat source component 12 does not function.

[0011] In the low-pressure heat source mode, the low-pressure steam heat source component 12 tracks and controls the generator's outlet temperature 9, while the high-pressure steam heat source component 11 does not function. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the differential pressure steam driven heat source unit of this utility model. The numbers in the diagram are as follows: 1—Drive heat source unit, 2—Generator of lithium bromide absorption chiller, 3—Drainage trap, 4—Differential pressure steam heat source, 5—High-pressure steam pipe, 6—Low-pressure steam pipe, 9—Outlet temperature of generator, 11—High-pressure steam heat source assembly, 12—Low-pressure steam heat source assembly, 13—Detection unit, 111—High-pressure electric valve, 112—High-pressure pressure sensor, 113—High-pressure temperature sensor, 121—Low-pressure electric valve, 122—Low-pressure pressure sensor, 123—Low-pressure temperature sensor, 131—Mixed pressure sensor, 132—Mixed temperature sensor, 41—High-pressure steam heat source, 42—Low-pressure steam heat source.

[0013] Figure 2 This is a flowchart of the dual-heat-source mode of the differential pressure steam-driven heat source unit of this utility model. The numbers in the diagram are: Pbefore - pressure before the low-pressure electric valve, Pafter - pressure after the low-pressure electric valve, ΔP - rated pressure drop of the low-pressure electric valve, and Pset value - pressure set value.

[0014] Figure 3 This is a flowchart of a single heat source mode for a differential pressure steam-driven heat source unit of this utility model.

[0015] Figure 4 This is a schematic diagram of a conventional lithium bromide absorption chiller with a differential pressure steam dual heat source. The numbers in the diagram are as follows: 2—generator of the lithium bromide absorption chiller, 4—differential pressure steam heat source, 5—high-pressure steam pipe, 6—low-pressure steam pipe, 7—high-pressure steam trap, 8—low-pressure steam trap, 9—generator outlet temperature, 111—high-pressure electric valve, 121—low-pressure electric valve, 41—high-pressure steam heat source, 42—low-pressure steam heat source. Detailed Implementation

[0016] The differential pressure steam-driven heat source unit of this invention consists of a high-pressure steam heat source assembly 11, a low-pressure steam heat source assembly 12, and a detection unit 13. The differential pressure steam heat source 4 is connected to the input terminal of the driving heat source unit 1 and then processed and converted. The high-pressure steam heat source 41, after being detected and processed by the high-pressure steam heat source assembly 11, outputs steam with a specific pressure and flow rate. The low-pressure steam heat source 42, after being detected and processed by the low-pressure steam heat source assembly 12, outputs steam with another specific pressure and flow rate. The two steam streams mix and enter the detection unit 13, which detects the pressure and temperature state of the mixed differential pressure steam. After processing by the control system, a specific pressure and flow rate of steam is output as a heat source and enters the generator 2 of the lithium bromide absorption chiller.

[0017] The differential pressure steam-driven heat source unit of this utility model is adapted to the following operating modes: when using dual heat sources, it is adapted to both the high-pressure steam heat source assembly (11) and the low-pressure steam heat source assembly (12); when using a single heat source, the high-pressure heat source is adapted to the high-pressure steam heat source assembly (11), and the low-pressure heat source is adapted to the low-pressure steam heat source assembly (12). This includes the following steps.

[0018] In the dual heat source mode, the low-pressure steam heat source 42 is used first. After the unit starts, the low-pressure steam heat source component 12 controls and adjusts the generator outlet temperature 9. When the low-pressure steam heat source 42 cannot meet the cooling demand, the high-pressure steam heat source 41 is used to supplement it. The high-pressure steam heat source component 11 participates in controlling and adjusting the generator outlet temperature 9, while the low-pressure steam heat source component 12 tracks the pressure P before the low-pressure electric valve. The differential pressure steam intake matching degree is controlled collaboratively through system analysis.

[0019] In the high-pressure heat source mode, the high-pressure steam heat source component 11 tracks and controls the generator's outlet temperature 9, while the low-pressure steam heat source component 12 does not function.

[0020] In the low-pressure heat source mode, the low-pressure steam heat source component 12 tracks and controls the generator's outlet temperature 9, while the high-pressure steam heat source component 11 does not function.

[0021] Combination Figure 1 The specific implementation process of this utility model is briefly described below.

[0022] The high-pressure steam heat source assembly 11 of the differential pressure steam driven heat source unit of this utility model consists of a high-pressure electric valve 111, a high-pressure pressure sensor 112, and a high-pressure temperature sensor 113. The high-pressure steam heat source 41 enters the input end of the high-pressure steam heat source assembly 11 through the high-pressure steam pipeline 5. The high-pressure pressure and temperature status of the high-pressure steam are detected by the high-pressure pressure sensor 112 and the high-pressure temperature sensor 113, respectively. The control system analyzes and processes the data, outputting commands to control the opening degree of the high-pressure electric valve 111.

[0023] The low-pressure steam heat source assembly 12 of the differential pressure steam driven heat source unit of this utility model consists of a low-pressure electric valve 121, a low-pressure pressure sensor 122, and a low-pressure temperature sensor 123. The low-pressure steam heat source 42 enters the input end of the low-pressure steam heat source assembly 12 via the low-pressure steam pipe 6. The low-pressure pressure sensor 122 and the low-pressure temperature sensor 123 detect the low-pressure steam pressure and temperature status, respectively. The control system analyzes and processes the data, outputting commands to control the opening degree of the low-pressure electric valve 121.

[0024] The detection unit 13 of the differential pressure steam-driven heat source unit of this invention consists of a mixed pressure sensor 131 and a mixed temperature sensor 132. The detection unit 13 is used to detect the pressure and temperature state of the differential pressure mixed steam obtained after the output terminals of the high-pressure steam heat source assembly 11 and the low-pressure steam heat source assembly 12 are connected in parallel. After processing by the control system, a steam with a specific pressure and flow rate is output as a heat source and enters the generator 2 of the lithium bromide absorption chiller.

[0025] Combination Figure 1 , Figure 2 The specific implementation process of the dual heat source mode involved in this utility model is briefly described as follows.

[0026] In the dual-heat-source mode of the differential pressure steam-driven heat source unit described in this utility model, after the unit starts, the low-pressure steam heat source 42 is used first, and the low-pressure steam heat source component 12 is activated. The low-pressure electric valve 121 tracks the generator outlet temperature 9 and automatically adjusts it. When the system determines that the generator outlet temperature 9 is lower than the set value, the low-pressure electric valve 121 is loaded; conversely, when the generator outlet temperature 9 is higher than the set value, the low-pressure electric valve 121 is unloaded. When the low-pressure electric valve 121 reaches 100% opening and the generator outlet temperature 9 is still lower than the set value, that is, the cooling capacity cannot meet the demand, the high-pressure steam heat source component 11 is activated to participate in the control. The high-pressure electric valve 111 tracks the generator outlet temperature 9 and adjusts it, while the low-pressure electric valve 121 tracks the pressure P before the low-pressure electric valve and adjusts it. The system automatically calculates the pressure difference across the low-pressure electric valve 121. If Pbefore - Pafter >= ΔP, then the high-pressure electric valve 111 is adjusted to track the generator's outlet temperature 9. Otherwise, the high-pressure electric valve 111 is unloaded to ensure the actual pressure difference across the low-pressure electric valve 121 does not exceed the rated pressure drop ΔP. Further, if Pbefore >= Pset value, then the low-pressure electric valve 121 is adjusted to track Pbefore. Otherwise, the low-pressure electric valve 121 is adjusted to track Pbefore. The system controls via a heat source group input method, analyzing and coordinating the differential pressure steam intake matching degree while ensuring the singularity of the controlled object to avoid control system malfunctions and ensure stable system operation.

[0027] Combination Figure 1 , Figure 3 The specific implementation process of the single heat source mode involved in this utility model is briefly described as follows.

[0028] The differential pressure steam-driven heat source unit of this invention selects a single heat source mode, which can be either a low-pressure heat source mode or a high-pressure heat source mode. The selected heat source component operates, and the corresponding heat source valve tracks and adjusts the generator's outlet temperature 9. For example, in the low-pressure heat source mode, after the unit starts, the low-pressure steam heat source component 12 is activated. The heat source valve is a low-pressure electric valve 121, which automatically adjusts the generator's outlet temperature 9. When the system determines that the generator's outlet temperature 9 is lower than the set value, the low-pressure electric valve 121 is loaded; when the system determines that the generator's outlet temperature 9 is higher than the set value, the low-pressure electric valve 121 is unloaded, and the high-pressure steam heat source component 11 is inactive. Similarly, if the high-pressure heat source mode is selected, the high-pressure steam heat source component 11 is activated after the unit starts. The heat source valve is the high-pressure electric valve 111. The high-pressure electric valve 111 tracks the generator outlet temperature 9 and adjusts it automatically. When the system determines that the generator outlet temperature 9 is lower than the set value, the high-pressure electric valve 111 is loaded. When the system determines that the generator outlet temperature 9 is higher than the set value, the high-pressure electric valve 111 is unloaded. The low-pressure steam heat source component 12 does not function.

[0029] Combination Figure 4The structure of the differential pressure steam dual heat source unit without this utility model is briefly described as follows.

[0030] Without this invention, high-pressure steam heat source 41 enters the generator 2 of the lithium bromide absorption chiller via high-pressure steam pipe 5, and condensate is discharged through high-pressure steam trap 7. Another low-pressure steam heat source 42 enters the generator 2 of the lithium bromide absorption chiller via low-pressure steam pipe 6, and condensate is discharged through low-pressure steam trap 8. With two heat sources entering the generator of the unit via independent pipes, the generator requires two sets of heat exchange areas, resulting in a large unit size and increased cost. Furthermore, when operating in single-heat-source mode, the heat exchange area of the other source remains idle, leading to waste.

[0031] The differential pressure steam-driven heat source unit described in this invention, through analysis and optimization of the existing dual-heat source structure of lithium bromide absorption chillers, effectively reduces the heat exchange area of the generator while ensuring the unit's functionality remains unchanged, further reducing the unit's size and lowering production costs. Simultaneously, it features a simple structure and wide applicability, covering application scenarios such as dual-steam, dual-flue gas, dual-hot water dual-heat source units, as well as multi-heat source units using the same medium.

[0032] The above description of the disclosed embodiments is not intended to limit the patent scope of this utility model. For those skilled in the art, any equivalent structural or procedural transformations made based on the content of this specification and drawings, or any direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this invention.

Claims

1. A differential pressure steam-driven heat source unit, comprising a high-pressure steam heat source assembly (11), a low-pressure steam heat source assembly (12), and a detection unit (13), characterized in that: Differential pressure steam heat source (4) is connected to the input end of the drive heat source group unit (1), high pressure steam heat source (41) enters the input end of high pressure steam heat source component (11), low pressure steam heat source (42) enters the input end of low pressure steam heat source component (12), the output ends of high pressure steam heat source component (11) and low pressure steam heat source component (12) are connected in parallel to the input end of detection unit (13), and the output end of detection unit (13) is connected to the generator (2) of lithium bromide absorption chiller.

2. The differential pressure steam-driven heat source unit according to claim 1, characterized in that: The high-pressure steam heat source assembly (11) consists of a high-pressure electric valve (111), a high-pressure pressure sensor (112), and a high-pressure temperature sensor (113).

3. The differential pressure steam-driven heat source unit according to claim 1, characterized in that: The low-pressure steam heat source assembly (12) consists of a low-pressure electric valve (121), a low-pressure pressure sensor (122), and a low-pressure temperature sensor (123).

4. The differential pressure steam-driven heat source unit according to claim 1, characterized in that: The detection unit (13) consists of a hybrid pressure sensor (131) and a hybrid temperature sensor (132).

5. The differential pressure steam-driven heat source unit according to any one of claims 1 to 4, characterized in that: When using dual heat sources, both high-pressure steam heat source components (11) and low-pressure steam heat source components (12) are compatible. When using a single heat source, the high-pressure heat source is compatible with the high-pressure steam heat source component (11), and the low-pressure heat source is compatible with the low-pressure steam heat source component (12).