Novel heat exchange system

Abstract

A novel heat exchange system comprises N heat exchange units, each heat exchange unit is composed of a gas-fired boiler, a high-temperature hot water pump and a plate heat exchange unit, the water outlet end of each gas-fired boiler is communicated with the water inlet end of the corresponding high-temperature hot water pump through a pipeline, and the water outlet end of each high-temperature hot water pump is communicated with the primary side water inlet end of the corresponding plate heat exchange unit through a pipeline. The primary side water outlet end of the plate type heat exchanger unit is communicated with the water inlet end of the gas-fired boiler through a pipeline; the circulating water path comprises a water return pipeline and a water supply pipeline, the secondary side water inlet ends of the plate type heat exchange units in the N heat exchange units are communicated with the water return pipeline through pipelines, and the secondary side water outlet ends of the plate type heat exchange units in the N heat exchange units are communicated with the water supply pipeline through pipelines; the first bypass pipe is simultaneously communicated with the primary side water inlet ends of the N groups of plate type heat exchanger units; and the second by-pass pipe is communicated with the primary side water outlet ends of the N groups of plate heat exchanger units at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and ventilation, and in particular to a novel 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 a new 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 a new type of 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: a new type of 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, a pipeline is passed between the water outlet of the gas boiler and the water inlet of the high-temperature hot water pump, a pipeline is passed between the water outlet of the high-temperature hot water pump and the primary water inlet of the plate heat exchanger unit, and a pipeline is passed between the primary water outlet of the plate heat exchanger unit and the water inlet of the gas boiler;

[0008] A circulating water circuit, including a return water pipeline and a water supply pipeline, wherein the secondary water inlet end of the plate heat exchanger in the N groups of heat exchange units is connected to the return water pipeline via a pipeline, and the secondary water outlet end of the plate heat exchanger in the N groups of heat exchange units is connected to the water supply pipeline via a pipeline;

[0009] A first bypass pipe, wherein the first bypass pipe is connected to the primary side water inlet end of the N groups of plate heat exchange units at the same time;

[0010] The second bypass pipe is connected to the primary side water outlet of the N groups of plate heat exchange units at the same time.

[0011] The preferred technical solution is: it also includes a normally closed electric valve, and the normally closed electric valve is arranged on the pipeline connecting the plate heat exchange unit and the high-temperature hot water pump.

[0012] The preferred technical solution is: it also includes a controller, and the controller is controlled and connected to the high-temperature hot water pump and the normally closed electric valve at the same time.

[0013] The preferred technical solution is: a circulation pump is provided in the circulation pipeline.

[0014] Due to the application of the above technical solution, the utility model has the following beneficial effects:

[0015] The utility model provides a novel heat exchange system, which is provided with a first bypass pipe and a second bypass pipe. The first bypass pipe is connected to the primary water inlet end of N groups of plate heat exchange units at the same time, and the second bypass pipe is connected to the primary water outlet end of N groups of plate heat exchange units at the same time; that is, when any heat exchange unit is working, the corresponding high-temperature hot water pump can send hot water to the primary side of the plate heat exchange unit corresponding to all heat exchange units through the first bypass pipe, and the low-temperature water after heat exchange can flow back to the water inlet end of the gas boiler through the second bypass pipe to achieve circulation; this solution can solve the problem that "passive diversion" of the plate heat exchanger unit causes water to flow through the low-temperature side, thereby reducing the water supply temperature and wasting energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a novel heat exchange system involved in the utility model. DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] 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.

[0020] Example:

[0021] like Figure 1 As shown, according to an overall technical concept of the utility model, a new heat exchange system is provided, comprising:

[0022] 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-type heat exchange unit 3, the water outlet of the gas boiler 1 and the water inlet of the high-temperature hot water pump 2 are connected by a pipeline, the water outlet of the high-temperature hot water pump 2 and the primary water inlet of the plate-type heat exchange unit 3 are connected by a pipeline, and the primary water outlet of the plate-type heat exchange unit 3 and the water inlet of the gas boiler 1 are connected by a pipeline;

[0023] The circulating water circuit includes a return water pipeline 4 and a water supply pipeline 5, wherein 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;

[0024] A first bypass pipe 6, the first bypass pipe 6 is connected to the primary side water inlet end of the N groups of plate heat exchange units 3;

[0025] The second bypass pipe 7 is connected to the primary side water outlet end of the N groups of plate heat exchange units 3 at the same time.

[0026] During operation, the gas boiler 1 in any heat exchange unit is turned on, and the heated hot water is sent to the corresponding plate heat exchange unit 3 through the corresponding high-temperature hot water pump 2, and is sent to the corresponding plate heat exchange unit 3 of other heat exchange units through the first bypass pipe 6. That is, when the gas boiler 1 in any heat exchange unit is in operation, hot water passes through the primary side of all plate heat exchange units 3, which can exchange heat with the "passive inflow" secondary side return water to avoid the return water directly merging with the supply water (hot water) and reduce the water temperature. Moreover, the hot water after heat exchange can flow back to the water inlet end of the gas boiler 1 in operation through the second bypass pipe 7 to achieve circulation.

[0027] like Figure 1 As shown, in an exemplary embodiment of the present utility model, a normally closed electric valve 8 is also included. The normally closed electric valve 8 is arranged on the pipeline connecting the plate heat exchanger unit 3 and the high-temperature hot water pump 2 to control the on-off of the pipeline.

[0028] like Figure 1 As shown, in an exemplary embodiment of the present utility model, a controller 9 is also included, and the controller 9 is controlled and connected to the high-temperature hot water pump 2 and the normally closed electric valve 8 at the same time.

[0029] like Figure 1 As shown, in an exemplary embodiment of the present utility model, a circulation pump (not shown) is provided in the circulation pipeline for realizing water supply and return circulation.

[0030] Therefore, the utility model has the following advantages:

[0031] The utility model provides a novel heat exchange system, which is provided with a first bypass pipe and a second bypass pipe. The first bypass pipe is connected to the primary water inlet end of N groups of plate heat exchange units at the same time, and the second bypass pipe is connected to the primary water outlet end of N groups of plate heat exchange units at the same time; that is, when any heat exchange unit is working, the corresponding high-temperature hot water pump can send hot water to the primary side of the plate heat exchange unit corresponding to all heat exchange units through the first bypass pipe, and the low-temperature water after heat exchange can flow back to the water inlet end of the gas boiler through the second bypass pipe to achieve circulation; this solution can solve the problem that "passive diversion" of the plate heat exchanger unit causes water to flow through the low-temperature side, thereby reducing the water supply temperature and wasting energy.

[0032] 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. A novel 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, a pipeline is passed between the water outlet of the gas boiler and the water inlet of the high-temperature hot water pump, a pipeline is passed between the water outlet of the high-temperature hot water pump and the primary water inlet of the plate heat exchanger unit, and a pipeline is passed between the primary water outlet of the plate heat exchanger unit and the water inlet of the gas boiler; A circulating water circuit, including a return water pipeline and a water supply pipeline, wherein the secondary water inlet end of the plate heat exchanger in the N groups of heat exchange units is connected to the return water pipeline via a pipeline, and the secondary water outlet end of the plate heat exchanger in the N groups of heat exchange units is connected to the water supply pipeline via a pipeline; A first bypass pipe, wherein the first bypass pipe is connected to the primary side water inlet end of the N groups of plate heat exchange units at the same time; The second bypass pipe is connected to the primary side water outlet of the N groups of plate heat exchange units at the same time.

2. A novel heat exchange system according to claim 1, characterized in that: It also includes a normally closed electric valve, which is arranged on a pipeline connecting the plate heat exchange unit and the high-temperature hot water pump.

3. A novel heat exchange system according to claim 2, characterized in that: It also includes a controller, which is controlled and connected to the high-temperature hot water pump and the normally closed electric valve at the same time.

4. A novel heat exchange system according to claim 1, characterized in that: A circulating pump is arranged in the circulating water circuit.

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