Energy-saving heat exchange system
By setting up a low-temperature normally closed electric valve in the heat exchange system and controlling its linkage opening, the energy waste caused by the passive shunt of the heat exchange unit in the prior art is solved, and the water supply temperature and system efficiency are improved.
Patent Information
- Application Number
- CN202421162368.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing heat exchange system has passive shunt on the low temperature side of the unstarted heat exchange unit, resulting in a small temperature difference between water supply and return water, increasing the transport flow and energy waste.
The low-temperature normally closed electric valve is installed on the connecting pipeline between the plate heat exchange unit and the return water pipeline of each group of heat exchange units, and the linkage opening of the high-temperature hot water pump and the low-temperature normally closed electric valve is controlled through the controller to avoid returning Low temperature water in the water pipeline enters the water supply pipeline.
It effectively avoids low-temperature water in the return water pipeline entering the water supply pipeline, increases the water supply temperature, and reduces energy waste and transport flow.
Smart Images
Figure CN222317189U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heating and ventilation, and in particular to an energy-saving heat exchange system. Background Art
[0002] The existing heat exchange system includes a circulating water circuit and multiple heat exchange units (3 groups), and the heat exchange units include "gas boilers, high-temperature hot water pumps and plate heat exchangers". The working principle and operating conditions of each heating unit are as follows: the manager manually turns on the gas boiler and the high-temperature water pump. The gas boiler adjusts the combustion heat supply and controls the boiler outlet water temperature to ensure the supply of high-temperature hot water (set value 70°C). After the high-temperature water pump delivers hot water to the primary side of the plate heat exchanger, it heats the low-temperature water from the user system on the secondary side of the plate heat exchanger, and then pressurizes the circulating water pump on the secondary side and delivers it to the user-end air conditioning equipment.
[0003] When the first set of heat exchange units is working, there is no water flow through the "second set of plate heat exchanger units-high temperature side" and the "third set of plate heat exchanger units-high temperature side". The return water in the circulating water circuit will be diverted to the "first set of plate heat exchanger units-low temperature side", but it is also "passively diverted" to the "second and third sets of plate heat exchanger units-low temperature side". Obviously, there is water flow through both the high temperature side and the low temperature side of the "first set of plate heat exchanger units", and the heat exchange function is successfully realized, which is what we hope to see. However, there is no need to start up the high temperature side of the "second and third sets of plate heat exchanger units", so there is no high temperature water flow, but there is water flow through the low temperature side due to the aforementioned "passive diversion". The above defects have the problem of small temperature difference between supply and return water, increased delivery flow and energy waste.
[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design an energy-saving heat exchange system to solve the above problems. Utility Model Content
[0005] In order to overcome the above-mentioned deficiencies in the prior art, the utility model aims to provide an energy-saving heat exchange system.
[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is: an energy-saving heat exchange system, comprising:
[0007] N groups of heat exchange units, each consisting of a gas boiler, a high-temperature hot water pump and a plate heat exchanger unit, wherein the water outlet of the gas boiler is connected to the water inlet of the high-temperature hot water pump through a pipeline, the water outlet of the high-temperature hot water pump is connected to the primary water inlet of the plate heat exchanger unit through a pipeline, and the primary water outlet of the plate heat exchanger unit is connected to the water inlet of the gas boiler through a pipeline;
[0008] A circulating water circuit, including a return water pipeline and a water supply pipeline, wherein the secondary water inlet of the plate heat exchanger in the N groups of heat exchange units is connected to the return water pipeline through a pipeline, and the secondary water outlet of the plate heat exchanger in the N groups of heat exchange units is connected to the water supply pipeline through a pipeline;
[0009] A normally closed electric valve on the low temperature side is arranged on the pipeline connecting the plate heat exchange unit and the return water pipeline.
[0010] The preferred technical solution is: it also includes a high-temperature side normally closed electric valve, and the high-temperature side normally closed electric valve is arranged on the pipeline connecting the plate heat exchange unit and the high-temperature hot water pump.
[0011] The preferred technical solution is: it also includes a controller, which is simultaneously controlled and connected to the high-temperature hot water pump, the low-temperature side normally closed electric valve, and the high-temperature side normally closed electric valve.
[0012] The preferred technical solution is: a circulating pump is provided in the circulating water circuit.
[0013] Due to the application of the above technical solution, the utility model has the following beneficial effects:
[0014] The utility model provides an energy-saving heat exchange system, which arranges a low-temperature side normally closed electric valve on the connecting pipeline between the plate heat exchanger unit and the return pipeline in each group of heat exchange units. During operation, a controller controls the corresponding high-temperature hot water pump and the low-temperature side normally closed electric valve to open in linkage, so as to avoid the low-temperature water in the return pipeline directly entering the water supply pipeline through the corresponding plate heat exchanger unit, resulting in low water supply temperature, increased delivery flow and waste of energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the energy-saving heat exchange system involved in the utility model. DETAILED DESCRIPTION
[0016] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0017] See also Figure 1. It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] Example:
[0020] like Figure 1 As shown, according to an overall technical concept of the utility model, an energy-saving heat exchange system is provided, comprising:
[0021] N groups of heat exchange units, the heat exchange units are composed of a gas boiler 1, a high-temperature hot water pump 2 and a plate heat exchanger unit 3, the water outlet of the gas boiler 1 is connected to the water inlet of the high-temperature hot water pump 2 through a pipeline, the water outlet of the high-temperature hot water pump 2 is connected to the primary side water inlet of the plate heat exchanger unit 3 through a pipeline, and the primary side water outlet of the plate heat exchanger unit 3 is connected to the water inlet of the gas boiler 1 through a pipeline;
[0022] The circulating water circuit includes a return water pipeline 4 and a water supply pipeline 5. The secondary water inlet of the plate heat exchanger 3 in the N groups of heat exchange units is connected to the return water pipeline 4 through a pipeline, and the secondary water outlet of the plate heat exchanger 3 in the N groups of heat exchange units is connected to the water supply pipeline 5 through a pipeline;
[0023] The low-temperature side normally closed electric valve 6 is arranged on the pipeline connecting the plate heat exchanger unit 3 and the return water pipeline 4.
[0024] like Figure 1 As shown, in an exemplary embodiment of the present utility model, it also includes a high-temperature side normally closed electric valve 7, which is arranged on the pipeline connecting the plate heat exchanger unit 3 and the high-temperature hot water pump 2.
[0025] like Figure 1 As shown, in an exemplary embodiment of the present utility model, a controller 8 is also included, and the controller 8 is simultaneously controlled and connected with the high-temperature hot water pump 2, the low-temperature side normally closed electric valve 6 and the high-temperature side normally closed electric valve 7.
[0026] like Figure 1 As shown, in an exemplary embodiment of the present utility model, a circulating pump (not shown) is provided in the circulating water circuit for realizing return water and water supply circulation.
[0027] During operation, any heat exchange unit is started as needed, that is, the controller 8 corresponding to the heat exchange unit controls the corresponding high-temperature hot water pump 2, the normally closed electric valve 6 on the low-temperature side, and the normally closed electric valve 7 on the high-temperature side to be opened in linkage; while for the heat exchange unit that is not started, the normally closed electric valve 6 on the low-temperature side and the normally closed electric valve 7 on the high-temperature side corresponding to the heat exchange unit that is not started remain closed, and the low-temperature water in the return water pipeline 4 will not enter the water supply pipeline 5 through the plate heat exchange unit 3 corresponding to the heat exchange unit that is not started. That is, the problem of lowering the water supply temperature and wasting energy consumption after the low-temperature water in the return water pipeline 4 and the high-temperature water in the water supply pipeline 5 are merged is solved.
[0028] Therefore, the utility model has the following advantages:
[0029] The utility model provides an energy-saving heat exchange system, which arranges a low-temperature side normally closed electric valve on the connecting pipeline between the plate heat exchanger unit and the return pipeline in each group of heat exchange units. During operation, a controller controls the corresponding high-temperature hot water pump and the low-temperature side normally closed electric valve to open in linkage, so as to avoid the low-temperature water in the return pipeline directly entering the water supply pipeline through the corresponding plate heat exchanger unit, resulting in low water supply temperature, increased delivery flow and waste of energy.
[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.
Claims
1. An energy-saving heat exchange system, characterized in that: include: N groups of heat exchange units, each consisting of a gas boiler, a high-temperature hot water pump and a plate heat exchanger unit, wherein the water outlet of the gas boiler is connected to the water inlet of the high-temperature hot water pump through a pipeline, the water outlet of the high-temperature hot water pump is connected to the primary water inlet of the plate heat exchanger unit through a pipeline, and the primary water outlet of the plate heat exchanger unit is connected to the water inlet of the gas boiler through a pipeline; A circulating water circuit, including a return water pipeline and a water supply pipeline, wherein the secondary water inlet of the plate heat exchanger in the N groups of heat exchange units is connected to the return water pipeline through a pipeline, and the secondary water outlet of the plate heat exchanger in the N groups of heat exchange units is connected to the water supply pipeline through a pipeline; A normally closed electric valve on the low temperature side is arranged on the pipeline connecting the plate heat exchange unit and the return water pipeline.
2. An energy-saving heat exchange system according to claim 1, characterized in that: It also includes a high-temperature side normally closed electric valve, which is arranged on a pipeline connecting the plate heat exchange unit and the high-temperature hot water pump.
3. An energy-saving heat exchange system according to claim 2, characterized in that: It also includes a controller, which is simultaneously controlled and connected to the high-temperature hot water pump, the low-temperature side normally closed electric valve, and the high-temperature side normally closed electric valve.
4. The energy-saving heat exchange system according to claim 1, characterized in that: A circulating pump is arranged in the circulating water circuit.