Double-loop double-medium heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers for industrial heat or domestic heat, in particular to a double-loop double-medium heat exchanger, which is characterized in that two outlet ends of an electric three-way valve are respectively connected with an air heat exchanger and a water heat exchanger through pipelines, and a domestic cold water pipe and a domestic hot water pipe are both connected onto the water heat exchanger; the multi-medium heat supply system achieves heat exchange of a single heat source among various media, achieves heat supply of factory areas and office areas and supply of domestic hot water in winter, and is simple in structure, high in heat exchange efficiency, low in energy consumption, low in cost and suitable for large-scale popularization and application. No energy medium loss exists in the working period, the problems of drainage and the like do not exist, and the high energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of heat exchangers for industrial or domestic use, specifically a dual-loop dual-medium heat exchanger. Background Technology

[0002] Current technologies for providing hot water for domestic use in factories generally employ the introduction of industrial steam. This involves using high-temperature, high-pressure steam to heat the domestic water. This method requires laying separate steam pipelines and condensate recovery pipelines for the users. Furthermore, the long-distance transport of steam necessitates the installation of numerous condensate drainage systems along the route to achieve the desired steam delivery. This approach results in two main problems: firstly, increased construction costs due to the need for additional steam pipelines, steam heaters, safety valves, and condensate drains; and secondly, high operating costs due to significant steam and water losses during the condensate drainage process. Additionally, if the condensate quality is substandard, all condensate must be discharged, inevitably leading to substantial energy losses. Utility Model Content

[0003] The purpose of this invention is to provide a dual-loop dual-medium heat exchanger to solve the problems of high construction and operating costs when connecting domestic hot water to industrial steam in the existing technology.

[0004] This utility model discloses a dual-circuit dual-medium heat exchanger, including an electric three-way valve. The heating network includes a heating network supply pipe and a heating network return pipe. The electric three-way valve has two outlet ends and one inlet end. The inlet end of the electric three-way valve is connected to the heating network supply pipe. The two outlet ends of the electric three-way valve are respectively connected to an air heat exchanger and a water heat exchanger through pipes. One outlet end of the electric three-way valve is connected to the inlet end of the air heat exchanger, and the other outlet end of the electric three-way valve is connected to the inlet end of the water heat exchanger. The air heat exchanger and the water heat exchanger are connected in parallel. The domestic water pipe includes a domestic cold water pipe and a domestic hot water pipe. Both the domestic cold water pipe and the domestic hot water pipe are connected to the water heat exchanger. The outlet ends of the air heat exchanger and the water heat exchanger are both connected to the heating network return pipe through pipes.

[0005] Furthermore, this includes pipeline pumps, which are connected in parallel to the return water pipe of the heating network via pipelines.

[0006] Furthermore, it includes a check valve connected to the return water pipe of the heating network. The check valve is connected in parallel with the pipeline pump and is located on the return water pipe of the heating network between the outlet end of the air heat exchanger and the outlet end of the water heat exchanger. The flow direction of the medium inside the check valve is from the water heat exchanger to the return water pipe of the heating network.

[0007] Furthermore, a temperature controller is connected to the heat network return water pipe; along the flow direction of the medium in the heat network return water pipe, the temperature controller is located on the last side of the heat network return water pipe.

[0008] Furthermore, a pipe flow sensor is connected to the hot water pipe for domestic use.

[0009] Furthermore, the air heat exchanger is a finned air cooling pipe.

[0010] Furthermore, the water heat exchanger is a dual-flow plate heat exchanger or a surface heat exchanger.

[0011] The beneficial effects of this utility model are as follows: This utility model realizes heat exchange between multiple media from a single heat source, enabling heating of the factory office area and supply of domestic hot water in winter, reducing the amount of industrial steam used, avoiding the problem of large water loss along the long-distance transportation of industrial steam, and achieving the goal of energy saving and consumption reduction; This utility model is easy to implement and saves costs; This utility model improves energy utilization, increases the heat-to-power ratio of the unit, and reduces the coal consumption for power generation of the unit; This utility model has a simple structure, high heat exchange efficiency, no energy medium loss during operation, and no problems such as water discharge, and has a high energy saving effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] In the diagram: 1. Heating network supply pipe; 2. Heating network return pipe; 3. Electric three-way valve; 4. Air heat exchanger; 5. Water heat exchanger; 6. Domestic cold water pipe; 7. Domestic hot water pipe; 8. Pipeline flow sensor; 9. Check valve; 10. Pipeline pump; 11. Temperature controller. Detailed Implementation

[0014] like Figure 1 As shown, this utility model discloses a dual-circuit dual-medium heat exchanger, including an electric three-way valve 3. The heating network includes a heating network supply pipe 1 and a heating network return pipe 2. The electric three-way valve 3 has two outlet ends and one inlet end. The inlet end of the electric three-way valve 3 is connected to the heating network supply pipe 1. The two outlet ends of the electric three-way valve 3 are respectively connected to an air heat exchanger 4 and a water heat exchanger 5 through pipes. One outlet end of the electric three-way valve 3 is connected to the inlet end of the air heat exchanger 4, and the other outlet end of the electric three-way valve 3 is connected to the inlet end of the water heat exchanger 5. The air heat exchanger 4 and the water heat exchanger 5 are connected in parallel. The domestic water pipe includes a domestic cold water pipe 6 and a domestic hot water pipe 7. Both the domestic cold water pipe 6 and the domestic hot water pipe 7 are connected to the water heat exchanger 5. The outlet ends of the air heat exchanger 4 and the water heat exchanger 5 are both connected to the heating network return pipe 2 through pipes.

[0015] This utility model includes a pipeline pump 10, which is connected in parallel to the return water pipe 2 of the heating network via a pipeline. The pipeline pump 10 is composed of a single-suction single-stage or multi-stage centrifugal pump, and the pipeline pump 10 realizes pressure and flow regulation of the primary heat source, thereby improving the heat exchange capacity.

[0016] This utility model includes a check valve 9, which is connected to the heat network return water pipe 2. The check valve 9 is connected in parallel with the pipeline pump 10. The check valve 9 is located on the heat network return water pipe 2 between the outlet end of the air heat exchanger 4 and the outlet end of the water heat exchanger 5. The flow direction of the medium inside the check valve 9 is from the water heat exchanger 5 to the heat network return water pipe 2.

[0017] A temperature controller 11 is connected to the return water pipe 2 of the heating network; along the flow direction of the medium in the return water pipe 2 of the heating network, the temperature controller 11 is located on the last side of the return water pipe 2 of the heating network.

[0018] A pipe flow sensor 8 is connected to the domestic hot water pipe 7. The pipe flow sensor 8 outputs a signal by sensing the water flow. The pipe flow sensor 8 has the advantages of being sensitive, having a long lifespan, and being safe and reliable. The pipe flow sensor 8 realizes the control of the electric three-way valve 3 by outputting the signal, and realizes the automatic switching of the working conditions.

[0019] Air heat exchanger 4 is a finned air radiator pipe. It can also utilize existing radiators, fan heaters, or other heat dissipation devices. Air heat exchanger 4 radiators have the advantages of small size, light weight, large heat dissipation area, and good heat dissipation effect. It can be used to heat spaces such as bathtubs and office buildings.

[0020] The water heat exchanger 5 is either a dual-pass plate heat exchanger or a surface heat exchanger. The water heat exchanger 5 has the advantages of small size, long service life, and high heat exchange efficiency. It can realize heat exchange between different flowing media.

[0021] The electric three-way valve 3 consists of an electric actuator and an L-shaped three-way valve. The electric three-way valve 3 has a compact structure and can switch the direction of media flow, effectively realizing the conversion between the air heat exchanger 4 and the water heat exchanger 5.

[0022] The temperature controller 11 consists of a temperature probe and a single chip.

[0023] The electric three-way valve 3 switches the hot water supply between the air heat exchanger 4 and the water heat exchanger 5. When the domestic water supply is interrupted, the electrical circuit of the pipeline water flow sensor 8 is disconnected and controls the electric three-way valve 3 to direct the heating network water supply to the air heat exchanger 4. When domestic water is available and the water flow is smooth, the electrical circuit of the pipeline water flow sensor 8 is activated and controls the electric three-way valve 3 to direct the heating network water supply to the water heat exchanger 5, thereby realizing heat exchange between the hot water supply and domestic water, increasing the domestic water temperature, and thus achieving hot water supply.

[0024] The installation of pipeline pump 10 increases the flow rate of circulating water in the heating network, further improving heat exchange efficiency. The installation of check valve 9 prevents the circulating water in the heating network from recirculating at the inlet and outlet of pipeline pump 10 after it starts operating, thus affecting the circulation flow rate.

[0025] Temperature controller 11 measures the return water temperature of the heating network in real time. When the return water temperature is lower than the set value of temperature controller 11, the electrical circuit of temperature controller 11 is closed and the pipeline pump 10 is controlled to run. When the return water temperature is higher than the set value of temperature controller 11, the electrical circuit of temperature controller 11 is opened and the pipeline pump 10 is controlled to stop. The setting of temperature controller 11 realizes the temperature interlock automatic start and stop function of pipeline pump 10.

[0026] This invention enables heat exchange between multiple media from a single heat source, providing heating for factory office areas and domestic hot water supply during winter. It reduces industrial steam consumption and avoids the problem of large water loss during long-distance industrial steam transportation, thus achieving the goal of energy conservation and consumption reduction. This invention is easy to implement and saves costs.

Claims

1. A double circuit double medium heat exchanger, the heat network comprising a heat network water supply pipe (1) and a heat network return pipe (2), characterized in that: The utility model relates to a heat supply network water temperature control system, including electric three-way valve (3), electric three-way valve (3) including two outlet ends and an import end, electric three-way valve (3) import end is connected on heat supply network water pipe (1), electric three-way valve (3) two outlet ends are connected with air heat exchanger (4) and water heat exchanger (5) respectively through pipeline, electric three-way valve (3) one outlet end is connected with air heat exchanger (4) import end, electric three-way valve (3) another outlet end is connected with water heat exchanger (5) import end, air heat exchanger (4) and water heat exchanger (5) are in parallel, domestic water pipe includes domestic water cold water pipe (6) and domestic water hot water pipe (7), domestic water cold water pipe (6) and domestic water hot water pipe (7) are connected on water heat exchanger (5), and air heat exchanger (4) outlet end and water heat exchanger (5) outlet end are connected on heat supply network backwater pipe (2) through pipeline.

2. A double circuit double medium heat exchanger according to claim 1, characterized in that: Including pipeline pump (10), pipeline pump (10) is connected in parallel on heat supply network backwater pipe (2) through pipeline.

3. A double circuit double medium heat exchanger according to claim 2, characterized in that: Including check valve (9), check valve (9) is connected on heat supply network backwater pipe (2), check valve (9) is connected in parallel with pipeline pump (10), check valve (9) is arranged on heat supply network backwater pipe (2) between air heat exchanger (4) outlet end and water heat exchanger (5) outlet end, and the flow direction of medium in check valve (9) is from water heat exchanger (5) to heat supply network backwater pipe (2).

4. A double circuit, double medium heat exchanger according to claim 3, characterized in that: Temperature controller (11) is connected on heat supply network backwater pipe (2), and along the flow direction of medium in heat supply network backwater pipe (2), temperature controller (11) is arranged on the last side along heat supply network backwater pipe (2).

5. A double circuit, double medium heat exchanger according to claim 4, characterized in that: Pipeline water flow sensor (8) is connected on domestic water hot water pipe (7).

6. A double circuit, double medium heat exchanger according to any one of claims 1 to 5, characterized in that: Air heat exchanger (4) is the air heat dissipation tube with fin.

7. A double circuit, double medium heat exchanger according to any one of claims 1 to 5, characterized in that: Water heat exchanger (5) is double-flow plate heat exchanger or surface heat exchanger.

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