A wind-distributing heat exchanger and air conditioner

Abstract

The present invention discloses an air-distributing heat exchanger and an air conditioner, belonging to the technical field of air conditioning heat exchange. The air-distributing heat exchanger comprises an air-distributing orifice plate and a plurality of single-row heat exchangers, wherein the plurality of single-row heat exchangers are arranged in parallel at a set interval, and an air-distributing orifice plate is arranged between each two adjacent single-row heat exchangers; and a plurality of air-distributing holes are provided on the air-distributing orifice plate. The present invention can solve the problem of reduced heat exchange performance of the heat exchanger due to uneven wind speed in a fin-tube heat exchanger, and through the joint action of the gap space formed between each single-row heat exchanger and the air-distributing orifice plate, each part of the heat exchanger has a uniform wind speed, thereby significantly improving the efficiency of the heat exchanger and significantly improving the performance of the air conditioning unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning heat exchange, and in particular to an air-distributing heat exchanger and an air conditioner. Background Art

[0002] The fin-tube heat exchangers for air conditioners currently on the market are multi-row heat exchangers composed of multiple single-row heat exchangers. Due to the unevenness of the fan flow field and the close connection between the single-row heat exchangers, the wind speed distribution in different parts of the heat exchanger is seriously uneven, with some parts having higher wind speeds and some parts having lower wind speeds. In the air conditioning unit, when the heat exchanger is used as an evaporator, the liquid refrigerant in the heat exchange tube with higher wind speed on the wind side evaporates quickly, resulting in a higher degree of superheat, while the liquid refrigerant in the heat exchange tube with lower wind speed on the wind side cannot evaporate, resulting in liquid in the air intake, which greatly reduces the heat exchange performance of the heat exchanger, resulting in a significant reduction in the heat exchange and energy efficiency of the air conditioning unit. In an air-conditioning unit, when the heat exchanger is used as a condenser, the gaseous refrigerant in the heat exchange tube with a higher wind speed on the wind side quickly condenses into liquid, resulting in a larger degree of subcooling. The gaseous refrigerant in the heat exchange tube with a lower wind speed on the wind side cannot be completely condensed, resulting in the outlet liquid still containing uncondensed gaseous refrigerant. This will also greatly reduce the heat exchange performance of the heat exchanger, resulting in a significant reduction in the heat exchange and energy efficiency of the air-conditioning unit. Summary of the invention

[0003] The embodiment of the present invention provides a uniform air flow heat exchanger, which can solve the problem of reduced heat exchange performance of the heat exchanger due to uneven wind speed in fin-tube heat exchangers. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0004] According to a first aspect of an embodiment of the present invention, there is provided an air balancing type heat exchanger, comprising an air balancing orifice plate and a plurality of single-row heat exchangers, wherein the plurality of single-row heat exchangers are arranged in parallel at a set interval, and the air balancing orifice plate is arranged between each two adjacent single-row heat exchangers; and a plurality of air balancing holes are provided on the air balancing orifice plate.

[0005] Optionally, the set spacing between two adjacent single-row heat exchangers is 30-50 mm.

[0006] Optionally, the diameter of the air balancing holes is 4-10 mm.

[0007] Optionally, the relationship between the wind speed V of the wind balancing hole and the diameter d of the wind balancing hole is: V=1500γ / d; wherein the unit of d is m; the unit of V is m / s; γ is the kinematic viscosity, the unit is m 2 / s.

[0008] Optionally, the total area F of the air balancing holes on the air balancing hole plate is: F = L / (3600Vα); wherein the unit of F is m 2 ; L is the total air volume of the heat exchanger, m 3 / h; α is the flow coefficient.

[0009] Optionally, the flow coefficient α has a value range of 0.74-0.82.

[0010] Optionally, the area of ​​the air balancing hole plate is adapted to the single-row heat exchanger opposite thereto.

[0011] Optionally, the thickness of the air balancing hole plate is smaller than the set spacing.

[0012] Optionally, between two adjacent single-row heat exchangers, a spacing between the air balancing hole plate and the single-row heat exchanger upstream of the air flow is twice a spacing between the air balancing hole plate and the single-row heat exchanger downstream of the air flow.

[0013] According to a second aspect of an embodiment of the present invention, there is provided an air conditioner, comprising the above-mentioned air-distributing heat exchanger.

[0014] The following technical effects can be achieved by the air-distributing heat exchanger of the embodiment of the present invention:

[0015] The heat exchanger is composed of multiple single-row heat exchangers, and an air balancing plate is set between two adjacent single-row heat exchangers. Since there is a set spacing between each single-row heat exchanger, the wind speed distribution is uneven. When the air reaches the gap space between each single-row heat exchanger, the air in the space with higher air static pressure will flow to the space with lower air static pressure. Therefore, the gap space has a certain wind balancing effect; an air balancing plate is set in the gap space between each single-row heat exchanger, and the air balancing plate has a better wind balancing effect. In this way, through the joint action of each layer of gaps and the air balancing plate, each part of the heat exchanger has a uniform wind speed, thereby significantly improving the efficiency of the heat exchanger and the performance of the air conditioning unit.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of a traditional fin-tube heat exchanger;

[0019] Figure 2 It is a schematic diagram of wind speed distribution of traditional fin-tube heat exchanger;

[0020] Figure 3 1 is a schematic diagram of the overall structure of the air-distributing heat exchanger according to an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of wind speed distribution of a wind-distributing heat exchanger according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the air distribution hole plate of the air distribution type heat exchanger according to an embodiment of the present invention.

[0023] Explanation of the accompanying figure numbers: 1. heat exchange tube; 2. fin; 3. gas collecting pipe; 4. liquid separation capillary; 5. distributor; 6. fan; 7. single-row heat exchanger; 8. air distribution hole plate; 9. air distribution hole. DETAILED DESCRIPTION

[0024] The following description and accompanying drawings fully illustrate specific embodiments of the present invention so that those skilled in the art can practice them. The examples represent possible variations only. Unless explicitly required, separate components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or generally by the term "invention", which is only for convenience, and if more than one invention is in fact disclosed, it is not intended to automatically limit the scope of the application to any single invention or inventive concept. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. The various embodiments are described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. As for the structures and products disclosed in the embodiments, since they correspond to the parts disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0025] According to a first aspect of an embodiment of the present invention, a wind-distributing heat exchanger is provided, comprising a wind-distributing orifice plate 8 and a plurality of single-row heat exchangers 7. The plurality of single-row heat exchangers 7 are arranged in parallel at a set interval, and a wind-distributing orifice plate 8 is arranged between every two adjacent single-row heat exchangers 7; and a plurality of wind-distributing orifices 9 are provided on the wind-distributing orifice plate 8.

[0026] like Figure 1 , Figure 2 As shown, we can see that the traditional fin-tube heat exchanger is a multi-row heat exchanger composed of multiple single-row heat exchangers 7, and the single-row heat exchanger 7 includes a heat exchange tube 1, a fin 2, a gas collecting pipe 3, a liquid separation capillary 4, a distributor 5 and a fan 6. The fin 2 increases the heat exchange area and improves the heat exchange efficiency. When the heat exchanger works as an evaporator, the gas-liquid two-phase refrigerant enters the heat exchange tube 1 of each single-row heat exchanger 7 through the liquid separation capillary 4 connected to the distributor 5, exchanges heat with the air outside the tube, and the liquid refrigerant evaporates to form a gas, and then collects in the gas collecting pipe 3 and is discharged from the heat exchanger. When the heat exchanger works as a condenser, the gas-phase refrigerant enters the heat exchange tube 1 of each single-row heat exchanger 7 through the gas collecting pipe 3, exchanges heat with the air outside the tube, and the gaseous refrigerant condenses to form a liquid, and then enters the liquid separation capillary 4, collects in the distributor 5 and is discharged from the heat exchanger. Due to the unevenness of the flow field of the fan 6 and the close connection between the single-row heat exchangers 7, the wind speed distribution in different parts of the heat exchanger is seriously uneven, with some parts having higher wind speeds and some parts having lower wind speeds, which greatly reduces the heat exchange performance of the heat exchanger and greatly reduces the heat exchange amount and energy efficiency of the air-conditioning unit.

[0027] like Figure 3 , Figure 4 As shown, the wind-equalizing heat exchanger includes a plurality of single-row heat exchangers 7, and a wind-equalizing orifice plate 8 is arranged between adjacent single-row heat exchangers 7. The specific arrangement of the wind-equalizing orifice plate 8 is not limited. The wind-equalizing orifice plate 8 can be fixed on the single-row heat exchanger 7 by installing slender screws at the four corners of the wind-equalizing orifice plate 8, or by arranging a fixed bracket between adjacent single-row heat exchangers 7, and placing the wind-equalizing orifice plate 8 in the fixed bracket. The plurality of single-row heat exchangers 7 can be arranged in parallel and spaced in the horizontal direction, or in parallel and spaced in the vertical direction. When the wind-equalizing heat exchanger is working, the fan 6 starts to rotate, and the wind generated by the air flow reaches the set spacing between each single-row heat exchanger 7 to form a gap space. The air in the space with higher air static pressure will flow to the space with lower air static pressure. Therefore, the gap space has a certain wind-equalizing effect. At the same time, the wind-equalizing holes 9 arranged on the wind-equalizing orifice plate 8 between adjacent single-row heat exchangers 7 can make the passing wind speed more uniform. The arrangement and working principle of the other structures of the heat exchange tube 1, fin 2, gas collecting tube 3, liquid separation capillary 4, distributor 5 and fan 6 are basically the same as those of the traditional fin-tube heat exchanger, and will not be described in detail here. Among them, the air balancing plate 8 can be made of metal material or heat-resistant hard material, which is not specifically limited here.

[0028] In an optional embodiment, the set spacing between two adjacent single-row heat exchangers 7 is 30-50 mm. The set spacing between the single-row heat exchangers 7 is between 30-50 mm, which can prevent the gap space formed when the spacing is too small from having a poor air balancing effect, and can also prevent the heat exchanger structure from being too large and occupying too much space due to the excessive spacing.

[0029] In an optional embodiment, the diameter of the air balancing hole is 4-10 mm. When the diameter of the air balancing hole 9 is too small, the amount of air passing through is small, which affects the air outlet; when the diameter of the air balancing hole 9 is too large, it cannot achieve the effect of uniform wind speed.

[0030] In an optional embodiment, the relationship between the wind speed V (m / s) of the wind balancing hole 9 and the diameter d (m) of the wind balancing hole is: V = 1500γ / d (γ is the kinematic viscosity, m 2 / s).

[0031] In an optional embodiment, the total area F (m 2 ) is: F = L / (3600Vα)(L is the total air volume of the heat exchanger, m 3 / h), α is the flow coefficient.

[0032] In an optional embodiment, the flow coefficient α has a value range of 0.74-0.82.

[0033] The above-mentioned set spacing, wind balancing hole diameter d, wind speed V, total area F of the wind balancing holes 9, etc. are all optimization parameters, which can achieve better wind balancing effect under smaller wind resistance.

[0034] Optionally, according to the total pressure distribution of the wind, the wind balancing holes are unevenly opened, and the number of wind balancing holes opened in the location with a large total pressure of the wind is greater than the number of wind balancing holes opened in the location with a small total pressure of the wind. This opening method is more conducive to uniform wind speed and better pressure balancing effect. Of course, evenly opening the wind balancing holes can also achieve the effect of wind balancing.

[0035] The embodiment of the present invention does not specifically limit whether the diameter of each wind balancing hole 9 is the same. In an optional embodiment, the diameter of the wind balancing hole 9 is smaller in a location where the total wind pressure is large, and the diameter of the wind balancing hole 9 is larger in a location where the total wind pressure is small. This opening method has a better pressure balancing effect and is more conducive to uniform wind speed.

[0036] Of course, it is also possible to ensure that each of the air balancing holes 9 is set to have the same diameter, which can also achieve the effect of air balancing.

[0037] In an optional embodiment, the area of ​​the wind balancing plate 8 is adapted to the single-row heat exchanger 7 opposite thereto. If the area of ​​the wind balancing plate 8 is too small, it cannot fully cover the single-row heat exchanger 7, causing air to bypass the uncovered space, resulting in uneven wind distribution; if the area of ​​the wind balancing plate 8 is too large, it will cause trouble for installation, resulting in an excessively large installation space and low space utilization.

[0038] In an optional embodiment, the thickness of the wind balancing plate 8 is less than the set spacing. When the thickness of the wind balancing plate 8 is equal to the set spacing, the wind balancing plate 8 will fill the gap space formed between adjacent single-row heat exchangers 7, which is not conducive to the air in the space with higher wind speed flowing to the space with lower wind speed, affecting the wind balancing effect.

[0039] In an optional embodiment, between two adjacent single-row heat exchangers 7, the distance between the wind balancing plate 8 and the single-row heat exchanger 7 located upstream of the air flow direction is twice the distance between the wind balancing plate 8 and the single-row heat exchanger 7 located downstream of the air flow direction. Such a setting ensures that the wind balancing plate 8 can play a better wind balancing role.

[0040] According to a second aspect of an embodiment of the present invention, an air conditioner is provided, comprising the above-mentioned air-distributing heat exchanger. When the above-mentioned air-distributing heat exchanger is installed in the air conditioner, the heat exchange effect is better, thereby improving the cooling or heating effect of the air conditioner.

[0041] By using the wind-equalizing heat exchanger and air conditioner of the embodiments of the present invention, a set spacing is maintained between each single-row heat exchanger of the air-conditioning fin-tube heat exchanger, and a wind-equalizing orifice plate with optimized parameters is arranged between each single-row heat exchanger, so that the wind speed in each part of the heat exchanger can be uniform, thereby improving the performance of the heat exchanger and the air-conditioning unit.

[0042] The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, this description should not be understood as a limitation of the present invention.

Claims

1. A wind-distributing heat exchanger, characterized in that: It includes an air balancing hole plate and a plurality of single-row heat exchangers, wherein the plurality of single-row heat exchangers are arranged in parallel at a set interval, and the air balancing hole plate is arranged between each two adjacent single-row heat exchangers; and a plurality of air balancing holes are provided on the air balancing hole plate; The thickness of the air balancing plate is smaller than the set spacing, and between two adjacent single-row heat exchangers, the spacing between the air balancing plate and the single-row heat exchanger upstream of the air flow is twice the spacing between the air balancing plate and the single-row heat exchanger downstream of the air flow; The number of the wind balancing holes opened at the location with high total wind pressure is greater than that opened at the location with low total wind pressure, the diameter of the wind balancing holes opened at the location with high total wind pressure is smaller, and the diameter of the wind balancing holes opened at the location with low total wind pressure is larger; The relationship between the wind speed V of the wind balancing hole and the diameter d of the wind balancing hole is: V=1500γ / d; wherein the unit of d is m; the unit of V is m / s; γ is the kinematic viscosity, the unit is m 2 / s; The total area F of the air balancing holes on the air balancing hole plate is: F = L / (3600Vα); wherein the unit of F is m 2 ; L is the total air volume of the heat exchanger, m 3 / h; α is the flow coefficient.

2. The air-distributing heat exchanger according to claim 1, characterized in that: The set spacing between two adjacent single-row heat exchangers is 30-50 mm.

3. The air-distributing heat exchanger according to claim 1, characterized in that: The diameter of the air balancing hole is 4-10 mm.

4. The air-distributing heat exchanger according to claim 1, characterized in that: The flow coefficient α ranges from 0.74 to 0.

82.

5. The air distribution type heat exchanger according to claim 1, characterized in that: The area of ​​the air balancing hole plate is adapted to the single-row heat exchanger opposite thereto.

6. An air conditioner, characterized in that: It comprises the air-distributing heat exchanger as described in any one of claims 1 to 5.

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