An indoor natural convection heat exchanger with an inclined heat exchange component

Abstract

The present application relates to an indoor natural convection heat exchanger with an inclined heat exchange component, including an inlet port, a header, a heat exchange component and an outlet port, wherein the inlet port and the outlet port are both sealed and connected to the header or the inlet port and the outlet port are both arranged on the header, the heat exchange component is arranged in at least two rows and at least two columns, the heat exchange component is connected between the headers, the heat exchange component is placed obliquely relative to the header, and there is a gap between the heat exchange components arranged adjacently in the horizontal direction. The present application has the technical advantages of large heat exchange area, high heat exchange efficiency and being conducive to natural convection of hot air.

Description

Technical Field

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

[0002] In cold regions, such as northern China, indoor heaters generally use centralized heating. Indoor heaters usually use the form of arranging heat exchangers side by side between the header and the outlet pipe. The heat exchangers are usually arranged in two parallel vertical rows, and each row of heat exchangers is connected to both sides of the header and the outlet pipe respectively. The heat exchangers are arranged at 90 degrees to the header and the outlet pipe. Each heat exchanger presents a sheet structure, and has an independent cavity inside for hot water to flow through. The disadvantage of this heat exchanger arrangement is that there is no channel for hot air circulation between the two rows of heat exchangers, and the top and bottom of the gap between the two rows of heat exchangers are respectively provided with the header and the outlet pipe. Since the hot air can only drive the natural convection of the indoor hot air by rising and flowing quickly after being heated between the two rows of heat exchangers, this structure not only cannot play a good role in draining the hot air at the bottom, but also after the hot air flows to the top, it will also cause poor circulation due to the obstruction of the top header, which greatly affects the improvement of heat exchange efficiency. In addition, traditional long strip heat exchanger plates have problems such as low heat exchange efficiency, mainly because their heat exchange area is small. Utility Model Content

[0003] The purpose of the present application is to design an indoor natural convection heat exchanger with an inclined heat exchange component, which has the technical advantages of a large heat exchange area, high heat exchange efficiency and is conducive to natural convection of hot air.

[0004] The present application relates to an indoor natural convection heat exchanger with an inclined heat exchange component, comprising an inlet port, a header, a heat exchange component and an outlet port, wherein the inlet port and the outlet port are both sealedly connected to the header or the inlet port and the outlet port are both arranged on the header, the heat exchange component is arranged in at least two rows and at least two columns, the heat exchange component is connected between the headers, the heat exchange component is inclined relative to the header, and there is a gap between the heat exchange components adjacent to each other in the horizontal direction.

[0005] Among them, the heat exchange components arranged adjacent to each other in the horizontal direction can be arranged in parallel or staggered in an eight-shaped or inverted eight-shaped shape; a baffle can be provided in the header; the arrangement line of the tube channels of the heat exchange component can form an angle of 45°-75° with the axis of the header, and the relationship between the spacing h between the upper and lower heat exchange components and the length L of the heat exchange component along the arrangement line satisfies h=0.2L-1.2L, and the gap B between adjacent heat exchange components in the horizontal direction is 0.4L-1.7L.

[0006] The present application also relates to an indoor natural convection heat exchanger, comprising a first collecting pipe, a second collecting pipe, a first heat exchange component, a second heat exchange component, a first collecting pipe and a second collecting pipe, wherein the two ends of the first heat exchange component are respectively sealedly connected to the first collecting pipe and the first collecting pipe, and the two ends of the second heat exchange component are respectively sealedly connected to the second collecting pipe and the second collecting pipe; the first heat exchange component and the second heat exchange component are inclined to the respectively connected collecting pipes, and there is a gap between the first heat exchange component and the second heat exchange component adjacent to each other in the horizontal direction.

[0007] Among them, the first heat exchange assembly and the second heat exchange assembly arranged adjacent to each other in the horizontal direction can be arranged in parallel or staggered in an eight-shaped or inverted eight-shaped shape; an inlet port and an outlet port can also be provided, the inlet port is sealedly connected to the first header pipe and the second header pipe, and the outlet port is sealedly connected to the first header pipe and the second header pipe; at least one of the first header pipe, the second header pipe, the first header pipe and the second header pipe can be provided with a baffle; the angle formed by the arrangement line of the pipe channel of the heat exchange assembly and the axis of the header can be 45°-75°; the relationship between the spacing h between the upper and lower heat exchange assemblies and the length L of the heat exchange assembly along the arrangement line satisfies h=0.2L-1.2L, and the gap B between adjacent heat exchange assemblies in the horizontal direction is 0.4L-1.7L. Preferably, a cover can also be provided on the outside of the indoor natural convection heat exchanger of the present application to form a chimney channel for hot air circulation.

[0008] The indoor natural convection heat exchanger with inclined heat exchange components of the present application, by tilting adjacent rows of heat exchange components relative to the header and providing gaps between corresponding heat exchange components in adjacent rows, can increase the flow rate of air on the heat exchange surface of the heat exchange components, improve the heat exchange effect of natural convection, enable the heat exchanger to meet the heat exchange requirements by indoor natural convection alone, and also realize the miniaturization and portability of the indoor natural convection heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of an implementation of the indoor natural convection heat exchanger of the present application.

[0010] Figure 2 It is a schematic diagram of another embodiment of the indoor natural convection heat exchanger of the present application.

[0011] Figure 3 It is a schematic diagram of the heat exchange effect of the indoor natural convection heat exchanger of the present application.

[0012] Figure 4 It is a parameter diagram of the indoor natural convection heat exchanger of the present application.

[0013] Figure 5a-5c It is a schematic diagram of the change in heat exchange efficiency of the indoor natural convection heat exchanger of the present application under the influence of different parameters. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present application clearer, the embodiments of the present application will be described in detail in conjunction with 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. The microchannel flat tube of the present application has a common meaning in the industry, and those skilled in the art can fully understand its meaning without limiting the specific size range.

[0015] like Figure 1 As shown, the indoor natural convection heat exchanger of the present application is mainly composed of an inlet port 1, a header 2, a heat exchange component 3, a baffle 4 and an outlet port 5. The inlet port 1 and the outlet port 5 are both sealed and connected to the header 2 or arranged on the header 2. At least two rows and at least two columns of heat exchange components 3 are arranged on the heat exchanger, and both ends of the heat exchange components 3 are sealed and connected to the header 2. The heat exchange components 3 are placed relative to the header 2 at an angle. Figure 1 and 2 As shown, there are four rows and two columns of heat exchange components 3. In each column, the heat exchange components 3 are arranged at intervals and tilted; in each row, the heat exchange components 3 of two adjacent columns are arranged relative to each other, and can be arranged in parallel or staggered in a figure eight or inverted figure eight shape, so as to form a channel for hot air to flow between the heat exchange components of adjacent rows and adjacent columns. The heat exchange components of the present application can be used Figure 4 The microchannel flat tube shown in the figure may also be in the form of a circular microchannel parallel pipe heat exchange tube. When the circular microchannel parallel pipe heat exchange tube is used, multiple parallel circular heat exchange tubes can be laid on a metal film or metal plate, so that the heat exchange surface of the heat exchanger can be expanded to the entire plane to form a more uniform temperature field.

[0016] Preferably, a baffle 4 may be provided in the header 2 to change the flow direction of the refrigerant in the heat exchanger and realize the circulation flow in the heat exchange component 3. In the natural convection heat exchanger of the present application, the refrigerant flows in from the inlet port 1 and is distributed by the header 2 to flow into the heat exchange component 3, flows out from the heat exchange component 3 and enters the header 2 again, and then flows out of the heat exchanger from the outlet port 5.

[0017] In another preferred embodiment, Figure 2As shown, the natural convection heat exchanger of the present application includes an inlet port 1, a first header pipe 21 and a second header pipe 22, a first heat exchange assembly 31 and a second heat exchange assembly 32, a first header pipe 41 and a second header pipe 42, an outlet port 5 and a baffle 4 arranged inside the header pipe. The inlet port 1 is sealedly connected to the first header pipe 21 and the second header pipe 22. There are multiple first heat exchange assemblies 31 and second heat exchange assemblies 32 on the heat exchanger. The two ends of the first heat exchange assembly 31 are sealedly connected to the first header pipe 21 and the first header pipe 41 respectively; the two ends of the second heat exchange assembly 32 are sealedly connected to the second header pipe 22 and the second header pipe 42 respectively. The two ends of the first heat exchange assembly 31 and the second heat exchange assembly 32 form an inclined angle with the header pipes connected to them respectively, and there is a spacing between the first heat exchange assembly 31 and the second heat exchange assembly 32, and the two are arranged side by side or staggered. The first header pipe 41 and the second header pipe 42 are further connected to the outlet port 5.

[0018] In order to evenly distribute the heat exchange medium in the channels of each heat exchange component, a baffle 4 can be set on the header, and the baffle 4 can also change the direction of the heat exchange medium. The heat exchange medium flows in from the inlet port 1, is distributed into two streams, and enters the first header pipe 21 and the second header pipe 22 respectively. After distribution, it flows into the first heat exchange component 31 and the second heat exchange component 32 respectively, and flows into the first header pipe 41 and the second header pipe 42 respectively, and flows out at the outlet port 5. The inlet port 1 and the outlet port 5 can be further connected to the outdoor unit, so that when the outdoor unit is driven, the heat exchange medium circulates in the heat exchanger for heat exchange.

[0019] Since the first heat exchange component 31 and the second heat exchange component 32 are inclined, a variable cross-section channel of hot air is formed, resulting in changes in flow rate and pressure. Figure 3 As shown, when the indoor air contacts the nth first heat exchange component 31 of the heat exchanger, the air exchanges heat with the heat exchange surface 31nB by natural convection, the air rises and exchanges heat with the heat exchange surface 31n+1A of the n+1th first heat exchange component 31, the air gains heat again, the density decreases, and the power of rising is strengthened, and the air flows out in the narrow area formed by the parallel n+1th pipe 31 and the n+1th second heat exchange component 32. Thus, a negative pressure is formed at the n+1th first heat exchange component 31n+1B, which is conducive to the supply of indoor air around the n+1th first heat exchange component 31n+1B. By analogy, as long as there is a temperature difference between the air and the surface temperature of the heat exchange surface of the heat exchange component, this effect always exists. Only when the air temperature is infinitely close to the surface temperature of the heat exchange component, this effect weakens or disappears.

[0020] The heat transfer coefficient k of this heat exchanger is related to factors such as the angle α formed by the arrangement line 33 of the inner tube channel of the heat exchange component 3 and the axis 21 of the header 2, the distance h between the two upper and lower heat exchange components 3, and the distance B between two adjacent heat exchange components 3. Figure 5a-5c As shown, when the α value gradually increases from 0, the k value gradually increases. When the α value is between 45° and 75°, the k value is in the maximum value region, and then the α value continues to increase, and the k value begins to gradually decrease. When the h value gradually increases from 0, the k value gradually increases. When the h value is between 0.2L and 1.2L (where L is the width of the heat exchange component along the arrangement line 33), the k value is in the maximum value region, and then the h value continues to increase, and the k value begins to gradually decrease. When the B value gradually increases from 0, the k value gradually increases. When the B value is between 0.4L and 1.7L, the k value is in the maximum value region, and then the B value continues to increase, and the k value begins to gradually decrease. That is, in the present application, when α is between 45° and 75°, h is between 0.2L and 1.2L, and B is between 0.4L and 1.7L, the heat exchange efficiency of the natural convection heat exchanger of the present application is optimal. A cover can also be provided on the outside of the indoor natural convection heat exchanger of the present application to form a chimney channel for hot air circulation. For example, the heat exchange tubes arranged in an eight-shaped shape and a stroke of the eight-shaped shape may form a chimney passage with the wall or the cover.

[0021] 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 an inclined heat exchange component, comprising an inlet port, a header, a heat exchange component and an outlet port, wherein the inlet port and the outlet port are both sealedly connected to the header or the inlet port and the outlet port are both arranged on the header, the heat exchange component is arranged in at least two rows and at least two columns, and the heat exchange component is connected between the headers, characterized in that: The heat exchange components are placed obliquely relative to the header, and there is a gap between the heat exchange components adjacently arranged in the horizontal direction.

2. The indoor natural convection heat exchanger according to claim 1, characterized in that: The heat exchange components adjacently arranged in the horizontal direction are arranged in parallel or staggered in an eight-shaped or inverted eight-shaped shape.

3. The indoor natural convection heat exchanger according to claim 1 or 2, characterized in that: A cover is provided outside the indoor natural convection heat exchanger.

4. The indoor natural convection heat exchanger according to claim 1 or 2, characterized in that: The angle formed by the arrangement line of the tube channel of the heat exchange component and the axis of the collecting pipe is 45°-75°, the relationship between the spacing h between the upper and lower heat exchange components and the length L of the heat exchange component along the arrangement line satisfies h=0.2L-1.2L, and the gap B between adjacent heat exchange components in the horizontal direction is B=0.4L-1.7L.

5. An indoor natural convection heat exchanger with an inclined heat exchange component, characterized in that: It includes a first collecting pipe, a second collecting pipe, a first heat exchange component, a second heat exchange component, a first collecting pipe and a second collecting pipe, the two ends of the first heat exchange component are respectively sealed with the first collecting pipe and the first collecting pipe, the two ends of the second heat exchange component are respectively sealed with the second collecting pipe and the second collecting pipe; the first heat exchange component and the second heat exchange component are inclined at 45°-75° to the respective connected collecting pipes, and there is a gap between the first heat exchange component and the second heat exchange component adjacent to each other in the horizontal direction.

6. The indoor natural convection heat exchanger according to claim 5, characterized in that: The first heat exchange assembly and the second heat exchange assembly adjacent to each other in the horizontal direction are arranged in parallel or staggered in an eight-shaped or inverted eight-shaped shape.

7. The indoor natural convection heat exchanger according to claim 6, characterized in that: An inlet port and an outlet port are also provided. The inlet port is sealedly connected to the first inlet collecting pipe and the second inlet collecting pipe, and the outlet port is sealedly connected to the first outlet collecting pipe and the second outlet collecting pipe.

8. The indoor natural convection heat exchanger according to any one of claims 5 to 7, characterized in that: At least one of the first inlet collecting pipe, the second inlet collecting pipe, the first outlet collecting pipe and the second outlet collecting pipe is provided with a baffle.

9. The indoor natural convection heat exchanger according to claim 8, characterized in that: The relationship between the spacing h between the upper and lower heat exchange components and the length L of the heat exchange components along the arrangement line satisfies h=0.2L-1.2L, and the gap B between adjacent heat exchange components in the horizontal direction=0.4L-1.7L.

10. The indoor natural convection heat exchanger according to any one of claims 5 to 7 and 9, characterized in that: A cover is provided outside the indoor natural convection heat exchanger.

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