Air duct heat exchange structure, unit and electrical equipment

Abstract

The present invention provides an air duct heat exchange structure, a unit and an electrical device, which relates to the technical field of electrical devices and solves the technical problem of small heat exchange area of ​​heat exchanger and low heat exchange efficiency due to the limitation of the existing unit layout. The air duct heat exchange structure includes a main air duct and at least one branch air duct, the air outlet of the branch air duct is connected to the main air duct, and heat exchangers are provided in the main air duct and the branch air duct. By connecting the air outlet of the branch air duct to the main air duct and providing heat exchangers in the main air duct and the branch air duct, the air flow after heat exchange in the branch air duct can enter the main air duct for heat exchange again, while increasing the heat exchange area of ​​the heat exchanger, achieving multiple heat exchanges and greatly improving the heat exchange efficiency. After the unit adopts the air duct heat exchange structure, the heat exchange efficiency is improved and the shell space utilization rate of the unit is also increased.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to an air duct heat exchange structure, a unit and electrical equipment. Background Art

[0002] In the commercial air conditioning industry, the overall layout of existing air conditioners is consistent, especially the top-outlet multi-split outdoor unit, such as Figure 1 As shown, the layout adopted is mainly a simple top-outlet layout, with the electrical box set in front of the pipe system. The applicant found that the existing layout is limited by the layout of the air conditioner and has the following problems:

[0003] Most existing commercial air-conditioning outdoor units use a single condenser, and some use L-shaped or U-shaped condensers connected in series. Due to the layout restrictions of the outdoor unit, the condenser heat exchange area is small, the heat exchange efficiency is low, and the shell space utilization is low;

[0004] The bottom of the condenser is far from the air outlet, creating a small negative pressure and low heat exchange efficiency at the bottom. In addition, in the traditional point switching layout, the electronic control is located directly below the air outlet, resulting in large wind resistance, which in turn affects the heat exchange efficiency of the wind farm:

[0005] In traditional air-conditioning layout, the electrical control box is usually installed in front of the pipeline. The space of the unit is small, and the electrical box needs to be removed before maintenance, which makes after-sales installation and maintenance inconvenient.

[0006] Similarly, many units with duct heat exchange structures also have structural limitations that result in small heat exchange area and low heat exchange efficiency. Summary of the Invention

[0007] The present invention aims to provide an air duct heat exchange structure, unit, and electrical equipment that at least address the existing technical issues of limited unit layout, small heat exchange area, and low heat exchange efficiency. The various technical effects achieved by the preferred technical solutions provided by the present invention are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The present invention provides a duct heat exchange structure for an outdoor unit, comprising a main air duct and at least one branch air duct, the air outlet of the branch air duct being connected to the main air duct, and heat exchangers being provided in both the main air duct and the branch air duct, so that the air flow after heat exchange through the branch air duct can enter the main air duct for heat exchange again.

[0010] Optionally, fan assemblies are provided in both the main air duct and the branch air duct.

[0011] Optionally, the fan assembly includes a fan and a flow guiding mechanism, and the flow guiding mechanism is at least partially arranged on the periphery of the fan blades of the fan.

[0012] Optionally, the fan assembly in the main air duct is arranged close to the air outlet of the main air duct.

[0013] Optionally, the axial direction of the fan assembly in the branch air duct forms an angle with the axial direction of the fan assembly in the main air duct.

[0014] The present invention provides a unit comprising a casing, a piping unit, an electronic control unit and any of the above-mentioned air duct heat exchange structures.

[0015] Optionally, the main air duct and the branch air duct are arranged side by side in the casing, and the air inlets of the main air duct and the branch air duct are respectively formed on the side walls of the casing, and the air outlet of the main air duct is located on the top side of the casing as the total air outlet of the multi-split outdoor unit.

[0016] Optionally, the branch air duct is formed at the top of the casing to form an accommodating space, and the electronic control unit is arranged in the accommodating space.

[0017] Optionally, the pipeline unit is arranged in the area enclosed by the heat exchanger in the main air duct.

[0018] The present invention provides an electrical device comprising any of the above-mentioned units.

[0019] The present invention provides a duct heat exchange structure, which connects the outlet of the branch duct to the main duct and arranges heat exchangers in both the main duct and the branch duct, so that the air flow after heat exchange through the branch duct can enter the main duct for further heat exchange. While increasing the heat exchange area of ​​the heat exchanger, multiple heat exchanges are achieved, greatly improving the heat exchange efficiency. After the unit adopts the duct heat exchange structure, the heat exchange efficiency is improved and the shell space utilization rate of the unit is also increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the layout structure of a multi-split outdoor unit in the prior art;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of a multi-split outdoor unit provided in a specific embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the multi-split outdoor unit;

[0024] Figure 4 1 is a schematic front cross-sectional view of a multi-split outdoor unit provided in a specific embodiment of the present invention, wherein arrows in the figure indicate the direction of air flow;

[0025] Figure 5 1 is a schematic diagram of a top cross-sectional structure of a multi-split outdoor unit provided by a specific embodiment of the present invention, wherein arrows in the figure indicate the direction of air flow;

[0026] Figure 6 It is a structural schematic diagram of a casing of a multi-split outdoor unit provided in a specific embodiment of the present invention.

[0027] In the figure, 1 is the main air duct; 2 is the branch air duct; 3 is the first condenser; 4 is the second condenser; 5 is the first fan assembly; 51 is the first fan; 52 is the first guide ring; 6 is the second fan assembly; 61 is the second fan; 62 is the second guide ring; 7 is the electronic control unit; 8 is the piping unit; 9 is the main air outlet; 10 is the upper crossbeam; 11 is the top cover; 12 is the base; 13 is the motor bracket; 14 is the wind shield; 15 is the panel; 16 is the side panel. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] The present invention provides a duct heat exchange structure, including a main air duct 1 and at least one branch air duct 2, the air outlet of the branch air duct 2 is connected to the main air duct 1, and heat exchangers are provided in both the main air duct 1 and the branch air duct 2. The air flow after heat exchange through the branch air duct 2 can enter the main air duct 1 for heat exchange again.

[0031] By connecting the air outlet of the branch duct 2 to the main duct 1 and setting a heat exchanger in both the main duct 1 and the branch duct 2, the air flow after heat exchange through the branch duct 2 can enter the main duct 1 for heat exchange again. While increasing the heat exchange area of ​​the heat exchanger, multiple heat exchanges are achieved, greatly improving the heat exchange efficiency. After the unit (such as a multi-split outdoor unit) adopts this duct heat exchange structure, the heat exchange efficiency is improved and the shell space utilization of the unit is also increased.

[0032] As an optional implementation, both heat exchangers are arranged along the wall of the air duct, forming an encircling structure with one side open, which effectively utilizes the air duct space. Figure 5 As shown, all heat exchangers are arranged in a C-shaped cross-section within their respective air ducts. This C-shape maximizes heat exchange area while utilizing space rationally. It also facilitates setting the connection between the main air duct 1 and the branch air duct 2, improving space utilization.

[0033] As an optional implementation, both the main air duct 1 and the branch air duct 2 are provided with fan assemblies for driving the air flow to circulate along a set path.

[0034] Specifically, the fan assembly includes a fan and a guide mechanism. The guide mechanism is at least partially disposed around the periphery of the fan blades. The guide mechanism can converge and guide dispersed airflow, thereby reducing airflow loss and lowering system energy consumption. In this embodiment, the guide mechanism uses a guide ring. The first fan assembly 5 in the main air duct 1 includes a first fan 51 and a first guide ring 52. The second fan assembly 6 in the branch air duct 2 includes two second fans 61 and corresponding second guide rings 62.

[0035] Example 2:

[0036] The present invention provides a multi-split outdoor unit, comprising a casing, a piping unit 8, an electronic control unit 7 and any of the above air duct heat exchange structures.

[0037] As an optional implementation, the heat exchanger in the main air duct 1 is the first condenser 3, and the heat exchanger in the branch air duct 2 is the second condenser 4; the main air duct 1 and the branch air duct 2 are arranged side by side in the casing, and the air inlets of the main air duct 1 and the branch air duct 2 are respectively formed on the side walls of the casing, and the air outlet of the main air duct 1 is located on the top side of the casing as the total air outlet 9 of the multi-split outdoor unit.

[0038] As an optional embodiment, the branch air duct 2 is evacuated at the top of the housing to form an accommodation space, within which the electronic control unit 7 is located. This placement of the electronic control unit 7, instead of the traditional placement within the flow field, avoids obstruction of airflow, reduces wind resistance, and ensures efficient heat exchange in the wind field. Furthermore, the electronic control unit 7 no longer occupies maintenance space, improving installation and maintenance convenience.

[0039] As an optional implementation, the fan assembly in the main air duct 1 is arranged close to the main air outlet 9.

[0040] As an optional embodiment, the axis of the first fan assembly 5 in the main air duct 1 is arranged horizontally. Only one main air outlet 9 is provided, and the two second fan assemblies 6 in the branch air duct 2 are arranged above and below each other, which improves the heat exchange effect of the lower part of the condenser and improves the heat exchange uniformity of various parts of the condenser.

[0041] Specifically, the piping unit 8 is disposed within the enclosed area of ​​the first condenser 3 .

[0042] like Figure 2-Figure 6 As shown, the present invention proposes a new arrangement method for the outdoor unit of the air conditioner, which increases the heat exchange area of ​​the unit's condenser through multiple heat exchanges in multiple air ducts, speeds up the heat exchange rate inside and outside the unit, and improves the heat exchange capacity of the unit; at the same time, it makes good use of the space wasted by the limitations of the traditional outdoor unit layout of the air conditioner, and through the multi-duct and multi-angle air duct layout (the air flow in the branch air duct 2 flows horizontally, and after entering the main air duct 1, it moves vertically upward together with the air flow in the main air duct 1), the heat exchange efficiency below the condenser is greatly improved; at the same time, combined with the layout of the electrical box component (electrical control unit 7) in the whole machine casing, the problem of optimizing the wind blocking of the electrical box component in the traditional air conditioner layout and occupying the unit pipeline maintenance space, resulting in difficult maintenance, is solved.

[0043] The layout of the air conditioner outdoor unit of the present invention mainly includes a shell, a main air duct 1, a branch air duct 2, a pipe unit 8, and an electronic control unit 7. Figure 2 and Figure 4 The first fan assembly 5 (first fan 51 and first guide ring 52) in the main air duct 1 is located above the first condenser 3; the piping unit 8 is located inside the first condenser 3; the second condenser 4 is located to the side of the first condenser 3, and the second fan assembly 6 (second fan 61 and second guide ring 62) in the branch air duct 2 is located inside the second condenser 4. The electronic control unit 7 is located above the second condenser 4, that is, to the side of the first fan assembly 5, at the top of the housing. The first fan assembly 5, second fan assembly 6, piping unit 8, and electronic control unit 7 are all located inside the housing.

[0044] The housing includes a panel 15, side panels 16, a base 12, a top cover 11, etc. Figure 6 The fan includes blades, a motor, and a motor bracket 13. The first condenser 3 and the second condenser 4 are in a "C" shape, with one end fixed by a side plate and the other end fixed by a windshield 14; the electronic control unit 7 is set on the upper crossbeam 10 of the unit, above the branch air duct 2.

[0045] The outdoor unit air conditioning layout of the present invention, when the system is started, the air flow in the wind field is as follows Figure 4 and Figure 5The main air duct 1 sends the air inside the unit out through the first guide ring 52. Due to the pressure difference inside the outdoor unit, the external air forms wind and passes through the first condenser 3 and the second condenser 4 components to enter the unit to complete the heat exchange. The second fan assembly 6 in the branch air duct 2 can accelerate the air flow entering the second condenser 4, speed up the flow of the wind field, and send the accelerated wind to the first condenser 3 for secondary heat exchange, and then enter the first fan assembly 5 from the first condenser 3. The first fan 51 then sends the incoming air flow to the outdoor unit; and so on. Figure 3 - Figure 5 , which greatly improves the heat exchange efficiency of the whole machine and solves the problem of poor heat exchange efficiency caused by the distance between the bottom of the traditional condenser component and the air duct outlet.

[0046] Since the electronic control unit 7 of the present invention is arranged above the branch air duct 2 instead of above the traditional pipeline unit, the problem of the electronic control unit 7 occupying the space of the pipeline system is solved. On the one hand, it is beneficial to the design of the pipeline system and the subsequent installation and maintenance, and on the other hand, it reduces the wind resistance of the electronic control unit 7 in the wind field.

[0047] The present invention also provides an air conditioner comprising any of the above multi-unit outdoor units. By utilizing multiple air ducts for multiple heat exchanges, the heat exchange area of ​​the unit's condenser is increased, accelerating the heat exchange rate between the unit and the outside, thereby improving the unit's heat exchange capacity. Furthermore, the invention effectively utilizes the space wasted by the limitations of traditional air conditioner outdoor unit layouts. Furthermore, the multi-duct, multi-angle air duct layout significantly improves the heat exchange efficiency below the condenser. Furthermore, due to the novel layout of the invention, the electrical control box can be located above the unit, resolving the problem of traditional air conditioner layouts where the electrical control box blocks wind and occupies maintenance space for the unit's piping, making maintenance difficult.

[0048] In the description of the invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A unit, characterized in that: The air duct heat exchanger comprises a housing, a piping unit, an electronic control unit and an air duct heat exchange structure, wherein the air duct heat exchange structure comprises a main air duct and at least one branch air duct, wherein the air outlet of the branch air duct is connected to the main air duct, and a heat exchanger is provided in each of the main air duct and the branch air duct, so that the air flow after heat exchange in the branch air duct can enter the main air duct for further heat exchange; Both heat exchangers are arranged along the duct wall, forming an encircling structure with one side open. All heat exchangers are arranged in a "C" shape in their respective ducts. The main air duct and the branch air duct are both provided with a fan assembly; The main air duct and the branch air duct are arranged side by side in the casing, and the air inlets of the main air duct and the branch air duct are respectively formed on the side walls of the casing, and the air outlet of the main air duct is located on the top side of the casing as the main air outlet of the outdoor unit; The branch air duct is formed at the top of the housing to form an accommodation space, and the electronic control unit is arranged in the accommodation space; The axis of the first fan assembly in the main air duct is arranged in a horizontal direction, and the two second fan assemblies in the branch air duct are arranged above and below.

2. The unit according to claim 1, characterized in that: The fan assembly includes a fan and a flow guiding mechanism, and the flow guiding mechanism is at least partially arranged on the periphery of the fan blades of the fan.

3. The unit according to claim 1, characterized in that: The fan assembly in the main air duct is arranged close to the air outlet of the main air duct.

4. The unit according to claim 1, characterized in that: The axial direction of the fan assembly in the branch air duct forms an angle with the axial direction of the fan assembly in the main air duct.

5. The unit according to claim 1, characterized in that: The pipeline unit is arranged in the area enclosed by the heat exchanger in the main air duct.

6. An electrical device, characterized in that: The invention comprises the unit described in any one of claims 1 to 5.

7. The electrical equipment according to claim 6, characterized in that: The electrical equipment is an air conditioner.

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