An indoor natural convection heat exchanger with a circuitous pipeline

Abstract

The present application relates to an indoor natural convection heat exchanger with a circuitous pipeline, comprising a header and parallel pipelines, wherein the parallel pipelines comprise a plurality of heat exchange tubes arranged in parallel, and the two ends of the parallel pipelines are respectively connected to the header, and the parallel pipelines are circuitously arranged and aligned; a vertical channel for air circulation is formed between the aligned parallel pipelines. The present application has the technical advantages of compact structure and high heat exchange effect.

Description

Technical Field

[0001] The present application relates to an indoor natural convection heat exchanger with a circuitous pipeline, which is applicable to the technical field of heat exchange equipment. Background Art

[0002] In winter, a common way to use air as a heat source for heating is thermal air conditioning, which is to transfer the heat absorbed from the outside to the indoors by blowing air to the indoor heat exchanger for forced convection, thereby warming the indoor temperature. However, this method also has some disadvantages. For example, it is common sense that hot air rises and cold air sinks, but thermal air conditioning blows hot air from the top to the bottom, which will inevitably cause a large temperature difference between the indoor floor and the ceiling. In addition, the use of forced convection will produce wind noise, affecting normal rest.

[0003] Technologies and products that use air as a heat source and natural convection for heating are constantly being introduced, such as air-source water floor heating and air-source fluorine floor heating. The former uses air energy to heat water, and then the hot water circulates in the water pipes laid under the floor to exchange heat to raise the temperature of the floor, and then the floor exchanges heat with the indoor air to raise the temperature of the house and make it warmer. The latter circulates the refrigerant in the air-source heat exchange unit directly in the floor heating heat exchanger laid under the floor, and then the floor exchanges heat with the indoor air to raise the temperature of the house and make it warmer. Floor heating follows the natural law that hot air rises and cold air sinks, and further eliminates indoor wind noise, but because the water pipes or heat exchangers for floor heating need to be laid in the floor, construction and maintenance are very troublesome. Utility Model Content

[0004] The purpose of this application is to design an indoor natural convection heat exchanger with a circuitous pipeline. Considering that the heat transfer coefficient of the natural convection heat exchanger is not as large as that of the forced convection, a larger heat exchange area is required. Considering that it cannot occupy a large space in the indoor space, the small diameter flexible heat exchanger is fully utilized to be easy to bend and form. By adopting a circuitous structure in the flexible heat exchanger, the heat exchange area is increased while the product size is reduced, making the structure of the heat exchanger of this application more compact and small, and convenient for transportation and use. In addition, there is a gap between the heat exchange surfaces of the flexible heat exchanger in the circuitous structure, which can form a chimney effect and enhance the heat exchange effect of natural convection heat exchange.

[0005] The present application relates to an indoor natural convection heat exchanger with a circuitous pipeline, comprising a header and parallel pipelines, wherein the parallel pipelines include a plurality of heat exchange tubes arranged in parallel, and both ends of the parallel pipelines are respectively connected to the header, and the parallel pipelines are circuitously arranged and aligned; vertical channels for air circulation are formed between the aligned parallel pipelines.

[0006] Among them, it can also include a cover shell, the aligned parallel pipelines are arranged in the cover shell and a vertical channel for air circulation is also formed between the cover shell; the indoor natural convection heat exchanger can form a distance greater than 10 mm with the ground, and the header can be placed horizontally or vertically; the header can also be provided with or connected to at least one of an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe can be connected to the connecting pipe of the outdoor heat exchange unit, and at least one baffle can be provided in the header.

[0007] The parallel pipelines may have more than two pipeline channels that are tightly connected, and two adjacent pipeline channels may have a common channel wall or different channel walls; the parallel pipelines may be connected to form a whole through a metal plate or a metal film. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the indoor natural convection heat exchanger of the present application.

[0009] Figure 2 It is a cross-sectional view of the indoor natural convection heat exchanger of the present application.

[0010] Figure 3 Schematic diagram of different structures of flexible parallel pipes of indoor natural convection heat exchanger.

[0011] Figure 4 It is a schematic diagram of the hot air flow channel inside the indoor natural convection heat exchanger of the present application. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0013] An embodiment of an indoor natural convection heat exchanger with a circuitous pipeline of the present application is as follows: Figure 1 As shown, it includes a cover 6, an inlet pipe 1, a header 2, a parallel pipeline 3, an outlet pipe 4 and a baffle 5. The refrigerant of the connecting pipe of the outdoor heat exchange unit flows in from the inlet pipe 1, enters the header 2 and is distributed into the parallel pipeline 3, and then gathers in another header 2 or another part of the same header 2, and flows into the connecting pipe of the outdoor heat exchange unit from the outlet pipe 4, and the heat exchange is circulated over and over again. The parallel pipeline 3 includes a plurality of small-diameter heat exchange tubes arranged in parallel. The small-diameter heat exchange tubes of the present application are preferably flexible heat exchange tubes of less than 4 mm, so that the flexible parallel pipelines can have good flexibility for bending and storage, and at the same time can also increase the heat exchange area and improve the heat exchange efficiency.

[0014] like Figure 2 As shown, two headers 2 are provided, and the headers 2 can be placed vertically. Multiple openings are provided on the header 2 in the height direction, and the two ends of multiple heat exchange tubes arranged in parallel are respectively connected to the corresponding openings of the two headers 2. Multiple heat exchange tubes arranged in parallel are arranged in a circuitous manner and aligned, so that a vertical channel 7 is formed between the aligned heat exchange tubes. Preferably, a vertical channel is also formed between the outermost heat exchange tube queue and the cover 6. The cover 6 of the present application can enhance the aesthetics of the natural convection heat exchanger and prevent burns or mechanical damage during use. At the same time, a chimney effect can be formed between the cover 6 and the arrangement surface of the parallel pipelines 3 to enhance heat exchange. The top of the cover 6 can be provided with an open portion, and the open portion can also be provided with a grille, a shutter, etc., for hot air to flow out. In the case where the cover 6 is not provided, each heat exchange tube queue can also be packaged separately.

[0015] In another embodiment, the header 2 can also be placed horizontally, and the two ends of the multiple parallel-arranged flexible heat exchange tubes are respectively connected to the corresponding openings of the two headers 2, and the aligned flexible heat exchange tubes also form a vertical channel 7. The vertical channel formed by the parallel pipeline arrangement in the present application can allow the heated air to rise freely through the vertical channel, thereby forming a low-pressure area in the housing, which can speed up the intake and heating of cold air, thereby improving the natural convection heat exchange efficiency of the heat exchanger.

[0016] The inlet pipe 1 is sealed and connected to the header 2, and the inlet pipe 1 is connected to the outdoor air source heat exchange unit so that the refrigerant can flow into the natural convection heat exchanger. The header 2 is sealed and connected to both ends of the parallel pipeline 3, which is the main channel for the refrigerant to flow in and out and be distributed to the parallel pipeline 3. The baffle 5 can change the flow direction of the refrigerant and make the refrigerant more uniform when the header 2 is distributed to the parallel pipeline 3.

[0017] Since natural convection is used for heat exchange, a larger heat exchange area is required to meet the heat exchange requirements, so the parallel pipeline 3 can be composed of more than two channels 31 and 32 that are tightly connected. In this way, although the refrigerant channel flow distance is very long, the parallel pipeline reduces the flow resistance of the refrigerant and further reduces the operating load of the compressor in the entire heat exchange unit, thereby achieving energy saving. Figure 3 As shown in Figures ac, two adjacent channels of the parallel pipeline 3 can use the same wall thickness to withstand the pressure of the refrigerant in the channel, or different channels can use their own wall thicknesses to withstand the pressure of the refrigerant in the channel. In order to form a uniform temperature field between different channels, metal sheets or metal films 33 can be used to connect them, thereby increasing the heat exchange area. Compared with the case of a, c is more flexible and solves the problem of easy confusion of heat exchange tubes in b during production and processing.

[0018] By designing the flexible parallel pipes into a circuitous shape, the present application can enable the natural convection heat exchanger to have a larger heat exchange area to meet the demand for heat exchange, while at the same time allowing the product to not occupy a large indoor area. There is a certain distance between the heat exchange surfaces formed by the parallel pipes to ensure that the indoor air can flow through this vertical channel. As the hot air continues to rise and the cold air continues to enter, a chimney effect of hot air flow is formed in the casing, which is beneficial to improving the natural convection heat exchange efficiency. Furthermore, there is also a certain distance between the flexible parallel pipes and the casing 3 to ensure that the indoor air can flow through the distance between the two, which can further enhance the natural convection heat exchange. Figure 4 As shown, an air inlet may be provided at the bottom of the heat exchanger of the present application, and a gap greater than 10 mm is formed between the bottom of the heat exchanger and the ground, so that indoor air flows in from the bottom and flows out from the top after heat exchange with the heat exchanger.

[0019] Although the implementation methods disclosed in this application are as above, the contents described are only implementation methods adopted for facilitating the understanding of this application, and are not intended to limit this application. Any technician in the technical field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. An indoor natural convection heat exchanger with a circuitous pipeline, comprising a header and parallel pipelines, wherein the parallel pipelines comprise a plurality of heat exchange tubes arranged in parallel, and both ends of the parallel pipelines are respectively connected to the header, characterized in that: The parallel pipelines are arranged in a circuitous manner and aligned; a vertical channel is formed between the aligned parallel pipelines.

2. The indoor natural convection heat exchanger according to claim 1, characterized in that: It also includes a cover shell, in which the parallel pipelines arranged in parallel are arranged and a vertical channel is formed between the pipelines and the cover shell.

3. The indoor natural convection heat exchanger according to claim 1 or 2, characterized in that: The indoor natural convection heat exchanger is spaced from the ground by a distance greater than 10 mm.

4. The indoor natural convection heat exchanger according to claim 1 or 2, characterized in that: The headers are placed horizontally or vertically.

5. The indoor natural convection heat exchanger according to claim 4, characterized in that: The header is also provided with or connected to at least one of an inlet pipe and an outlet pipe.

6. The indoor natural convection heat exchanger according to claim 5, characterized in that: The inlet pipe and the outlet pipe are connected to the connecting pipe of the outdoor heat exchange unit.

7. The indoor natural convection heat exchanger according to claim 1 or 2 or 5 or 6, characterized in that: At least one baffle is arranged in the header.

8. The indoor natural convection heat exchanger according to claim 1 or 2 or 5 or 6, characterized in that: The parallel pipeline has more than two pipeline channels that are tightly connected.

9. The indoor natural convection heat exchanger according to claim 8, characterized in that: Two adjacent line channels have a common channel wall or have different channel walls.

10. The indoor natural convection heat exchanger according to claim 8, characterized in that: The parallel pipelines are connected to form a whole through metal plates or metal films.

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