Pipeline switching device of refrigerating and heating system

Abstract

The utility model discloses a refrigerating and heating system pipeline switching device which comprises a two-pipe air-conditioning disc, a water outlet and a water return port are arranged on the two-pipe air-conditioning disc, the water outlet is connected with a water outlet pipeline, and the water return port is connected with a water return pipeline. According to the pipeline switching device of the refrigerating and heating system, switching of cooling and heating is achieved on the two-pipe air disc through the water inlet pipeline, the water return pipeline and the valves on the pipelines, the pipelines are simple, installation is convenient, and cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning system technology, specifically relating to a pipeline switching device for a refrigeration and heating system. Background Technology

[0002] Fan coil units are terminal devices in central air conditioning systems. When chilled water flows inside the fan coil unit, the air is cooled and dehumidified; when hot water flows inside, the air is heated, thereby regulating indoor air temperature and humidity.

[0003] In existing technologies, two-pipe fan coil units have only two interfaces, allowing for only one function: cooling or heating. To achieve both cooling and heating simultaneously, a four-interface fan coil unit is required, which is more complicated to install. Utility Model Content

[0004] The purpose of this invention is to propose a pipeline switching device for a refrigeration and heating system, which enables two-pipe fan coil units to achieve both refrigeration and heating functions through pipeline improvements.

[0005] Therefore, this utility model provides a pipeline switching device for a refrigeration and heating system, comprising: a two-pipe fan coil unit, wherein the two-pipe fan coil unit is provided with a water outlet and a water return outlet, the water outlet is connected to a water outlet pipeline, and the water return outlet is connected to a water return pipeline.

[0006] Preferably, the water outlet pipeline includes a main water outlet pipe, a first water outlet pipe, and a second water outlet pipe. The main water outlet pipe is connected to the water outlet, and the first water outlet pipe and the second water outlet pipe are connected to the main water outlet pipe.

[0007] Preferably, the return water pipeline includes a main return water pipe, a first return water pipe, and a second return water pipe. The main return water pipe is connected to the return water inlet, and the first return water pipe and the second return water pipe are connected to the main return water pipe.

[0008] Preferably, a first valve is provided on the first water outlet pipe.

[0009] Preferably, a second valve is provided on the second water outlet pipe.

[0010] Preferably, a third valve is provided on the first return water pipe.

[0011] Preferably, a fourth valve is installed on the second return water pipe.

[0012] Preferably, the system also includes a controller, which is electrically connected to the first valve, the second valve, the third valve, and the fourth valve.

[0013] Preferably, the first outlet pipe and the first return pipe are connected to a heating unit.

[0014] Preferably, the second outlet pipe and the second return pipe are connected to a refrigeration unit.

[0015] Beneficial effects:

[0016] 1. This utility model provides a pipeline switching device for a refrigeration and heating system. The switching between cooling and heating is achieved on a two-pipe fan coil unit through inlet and outlet water pipes and valves on the pipes. The pipeline is simple, easy to install, and cost-effective. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of a refrigeration and heating system pipeline switching device provided by this utility model.

[0019] Figure 2 This is a schematic diagram of the connection between two ventilation coils in related technologies.

[0020] Figure 3 This is a schematic diagram of the connection of a four-pipe ventilation disc in related technologies.

[0021] In the diagram, 1-two-pipe ventilation coil, 11-water outlet, 12-return water outlet, 2-water outlet pipe, 21-main water outlet pipe, 22-first water outlet pipe, 23-second water outlet pipe, 24-first valve, 25-second valve, 3-return water pipe, 31-main return water pipe, 32-first return water pipe, 33-second return water pipe, 34-third valve, 35-fourth valve, 4-heating unit, 5-cooling unit. Detailed Implementation

[0022] The following detailed description of preferred embodiments of the present invention, along with the included examples, will make the content of the present invention more readily understood. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In case of any conflict, the definitions in this specification shall prevail.

[0023] Example 1:

[0024] The existing two-pipe ventilation disc, such as Figure 2 As shown, the two-pipe fan coil unit is connected to an inlet pipe and a return pipe, used to connect to a refrigeration unit or a heating unit. To achieve cooling or heating within a single fan coil unit, it is necessary to use... Figure 3The four-pipe fan coil unit shown connects two inlet pipes and two return pipes, which are respectively connected to the refrigeration unit and the heating unit to achieve cooling or heating. However, the installation of the four-pipe fan coil unit is more complicated and the cost is higher.

[0025] Therefore, in order to achieve both cooling and heating functions in a two-pipe ventilation coil, such as... Figure 1 The refrigeration and heating system pipeline switching device shown includes: a two-pipe fan coil unit 1, which is provided with a water outlet 11 and a water return outlet 12. The water outlet 11 is connected to a water outlet pipe 2, and the water return outlet 12 is connected to a water return pipe 3.

[0026] The water outlet pipe 2 includes a main water outlet pipe 21, a first water outlet pipe 22, and a second water outlet pipe 23. The main water outlet pipe 21 is connected to the water outlet 11. The first water outlet pipe 22 and the second water outlet pipe 23 are connected to the main water outlet pipe 21. A first valve 24 is installed on the first water outlet pipe 22, and a second valve 25 is installed on the second water outlet pipe 23.

[0027] The return water pipeline 3 includes a main return water pipe 31, a first return water pipe 32, and a second return water pipe 33. The main return water pipe 31 is connected to the return water inlet 12. The first return water pipe 32 and the second return water pipe 33 are connected to the main return water pipe 31. A third valve 34 is installed on the first return water pipe 32, and a fourth valve 35 is installed on the second return water pipe 33.

[0028] It also includes a controller, which is electrically connected to the first valve 24, the second valve 25, the third valve 34, and the fourth valve 35. The controller is used to control the opening and closing of the first valve 24, the second valve 25, the third valve 34, and the fourth valve 35, wherein the first valve 24 and the third valve 34 open or close simultaneously, the second valve 25 open or close simultaneously, the second valve 25 closes when the first valve 24 is open, and the second valve 25 opens when the first valve 24 is closed. The first valve 24, the second valve 25, the third valve 34, and the fourth valve 35 are solenoid valves.

[0029] The first outlet pipe 22 and the first return pipe 32 are connected to the heating unit 4. The second outlet pipe 23 and the second return pipe 33 are connected to the cooling unit 5. The first outlet pipe 22, the first return pipe 32, the main outlet pipe 21, the main return pipe 31, the heating unit 4, and the two-pipe fan coil unit 1 form a heating circuit, and the second outlet pipe 23, the second return pipe 33, the main outlet pipe 21, the main return pipe 31, the cooling unit 5, and the two-pipe fan coil unit 1 form a cooling circuit.

[0030] Working principle: When cooling is required, close the first valve 24 and the third valve 34, and open the second valve 25 and the fourth valve 35. The second outlet pipe 23, the second return pipe 33, the main outlet pipe 21, the main return pipe 31, the refrigeration unit 5, and the two-pipe fan coil unit 1 form a refrigeration circuit for cooling. When heating is required, close the second valve 25 and the fourth valve 35, and open the first valve 24 and the third valve 34. The first outlet pipe 22, the first return pipe 32, the main outlet pipe 21, the main return pipe 31, the heating unit 4, and the two-pipe fan coil unit 1 form a heating circuit for heating.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pipeline switching device for a refrigeration and heating system, characterized in that, include: A two-pipe ventilation coil is provided with a water outlet and a water return outlet. The water outlet is connected to a water outlet pipe, and the water return outlet is connected to a water return pipe. The water outlet pipeline includes a main water outlet pipe, a first water outlet pipe, and a second water outlet pipe. The main water outlet pipe is connected to the water outlet, and the first water outlet pipe and the second water outlet pipe are connected to the main water outlet pipe. The return water pipeline includes a main return water pipe, a first return water pipe, and a second return water pipe. The main return water pipe is connected to the return water inlet, and the first return water pipe and the second return water pipe are connected to the main return water pipe. A first valve is installed on the first water outlet pipe; A second valve is installed on the second water outlet pipe; A third valve is installed on the first return water pipe; A fourth valve is installed on the second return water pipe.

2. The refrigeration and heating system pipeline switching device according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the first valve, the second valve, the third valve and the fourth valve.

3. The refrigeration and heating system pipeline switching device according to claim 1, characterized in that, The first outlet pipe and the first return pipe are connected to a heating unit.

4. The refrigeration and heating system pipeline switching device according to claim 1, characterized in that, The second outlet pipe and the second return pipe are connected to the refrigeration unit.

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