Condenser and air conditioning equipment

Abstract

The present disclosure relates to a condenser and an air conditioning device. The condenser includes: a housing provided with a gaseous refrigerant inlet, a cooling medium outlet, a cooling medium inlet, and a liquid refrigerant outlet; a first heat exchange tube disposed in the housing, with its inlet and outlet respectively communicating with the cooling medium inlet and the cooling medium outlet; and a sleeve disposed in the housing and sleeved outside the first heat exchange tube. A spiral heat exchange channel is formed between the inner wall of the sleeve and the outer wall of the first heat exchange tube, and the inlet and outlet of the heat exchange channel respectively communicate with the gaseous refrigerant inlet and the liquid refrigerant outlet. The refrigerant fully exchanges heat with the cooling medium in the first heat exchange tube within the spiral heat exchange channel. The spiral heat exchange channel increases the degree of disturbance to the refrigerant, enhances the heat exchange effect, improves the heat exchange efficiency, and effectively avoids the occurrence of cross-flow phenomenon.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning equipment, and particularly to a condenser and an air conditioning equipment. Background Art

[0002] Evaporators and condensers are important components in commercial air conditioning units. To improve the energy efficiency of the units, a common method is to enhance the heat transfer capacity of the heat exchanger.

[0003] One of the common methods to improve the heat transfer capacity of the condenser is to appropriately increase the subcooling degree. In a traditional condenser, gaseous refrigerant enters through the intake port and condenses in the condensation area at the upper part inside the condenser. The condensed refrigerant then reaches the subcooling area in the space at the bottom of the housing. A common subcooling area solution is for the refrigerant to pass through a baffle to achieve subcooling. In such a structure, due to the presence of the baffle plate and the possible unreasonable setting of the baffle plate spacing, it is easy to form a flow dead zone at the root of each baffle plate, reducing the utilization efficiency of the heat exchange tubes and the heat transfer capacity. At the same time, in the above structural form, if the subcooling degree is to be further increased, usually the number of heat exchange tubes and baffle plates is increased. Such a method not only increases the risk of forming a flow dead zone, but also wastes materials and the internal space of the housing. In addition, due to factors such as the processing and assembly errors of the baffle plate and the housing, there are gaps between the heat exchange tubes and the baffle plate, and between the baffle plate and the housing, resulting in refrigerant cross-flow. Summary of the Invention

[0004] The inventors have found through research that there is a problem of low heat transfer efficiency in the related art.

[0005] In view of this, the embodiments of the present disclosure provide a condenser and an air conditioning equipment, which can improve the heat transfer efficiency.

[0006] Some embodiments of the present disclosure provide a condenser, including:

[0007] A housing provided with a gaseous refrigerant inlet, a cooling medium outlet, a cooling medium inlet, and a liquid refrigerant outlet;

[0008] A first heat exchange tube disposed inside the housing, and its inlet and outlet are respectively communicated with the cooling medium inlet and the cooling medium outlet; and

[0009] A sleeve disposed inside the housing and sleeved outside the first heat exchange tube;

[0010] Wherein, a spiral heat exchange channel is formed between the inner wall of the sleeve and the outer wall of the first heat exchange tube, and the inlet and outlet of the heat exchange channel are respectively communicated with the gaseous refrigerant inlet and the liquid refrigerant outlet.

[0011] In some embodiments, both the first heat exchange tube and the sleeve are located at the bottom of the housing.

[0012] In some embodiments, the inner wall of the casing is provided with spiral grooves or protrusions for forming a heat exchange channel.

[0013] In some embodiments, the cross-section of the spiral groove is triangular, rectangular or circular.

[0014] In some embodiments, the pitch of the spiral groove is 1 mm to 10 mm.

[0015] In some embodiments, the difference between the inner diameter of the casing and the outer diameter of the first heat exchange tube is 0.5 mm to 2.5 mm.

[0016] In some embodiments, the wall thickness of the casing is equal to the wall thickness of the first heat exchange tube.

[0017] In some embodiments, it further includes two tube sheets and a plurality of second heat exchange tubes arranged in the shell. The first heat exchange tube and the second heat exchange tubes are both arranged on the tube sheets, and the second heat exchange tubes are located above the first heat exchange tube.

[0018] In some embodiments, there are multiple first heat exchange tubes arranged in multiple rows with a staggered layout.

[0019] In some embodiments, the heat exchange channels are distributed on both sides of the liquid refrigerant outlet.

[0020] In some embodiments, it further includes a support tube and a support plate arranged in the shell. The support plate is arranged inside the support tube and is used to support the casing.

[0021] Some embodiments of the present disclosure provide an air conditioning device, including the aforementioned condenser.

[0022] Therefore, according to the embodiments of the present disclosure, by arranging the first heat exchange tube in the shell and the casing sleeved outside the first heat exchange tube, a spiral heat exchange channel is formed between the inner wall of the casing and the outer wall of the first heat exchange tube. The refrigerant exchanges heat fully with the cooling medium in the spiral heat exchange channel and inside the first heat exchange tube. The spiral heat exchange channel increases the disturbance degree of the refrigerant, enhances the heat exchange effect, improves the heat exchange efficiency, and effectively avoids the occurrence of cross-flow phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings forming a part of this specification depict embodiments of the present disclosure and, together with the description, are used to explain the principles of the present disclosure.

[0024] Referring to the drawings, according to the following detailed description, the present disclosure can be understood more clearly, wherein:

[0025] Figure 1 is a front view structural schematic diagram of some embodiments of the condenser of the present disclosure;

[0026] Figure 2It is a schematic side view structure diagram of some embodiments of the condenser of the present disclosure;

[0027] Figure 3 It is a schematic structure diagram of the first heat exchange tube and the sleeve in some embodiments of the condenser of the present disclosure;

[0028] Figure 4 It is a schematic partial structure diagram of some embodiments of the condenser of the present disclosure at the liquid refrigerant outlet position;

[0029] Figure 5 It is a schematic side view structure diagram of the support plate in some embodiments of the condenser of the present disclosure.

[0030] Description of reference numerals

[0031] 1. Housing; 2. Tube sheet; 3. Gaseous refrigerant inlet; 4. Cooling medium outlet; 5. Cooling medium inlet; 6. Liquid refrigerant outlet; 7. First heat exchange tube; 8. Sleeve; 9. Support tube; 10. Support plate; 11. Second heat exchange tube; 12. Heat exchange channel. Detailed description of specific embodiments

[0032] Now, various exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments herein. These embodiments are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0033] The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. Words such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In the present disclosure, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to other devices without an intermediate device, or may not be directly connected to other devices but have an intermediate device.

[0035] All terms used in this disclosure have the same meanings as those understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0036] Technologies, devices, and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, devices, and equipment should be regarded as part of the specification.

[0037] As Figures 1 to 5 shown, some embodiments of the present disclosure provide a condenser, including: a housing 1, a first heat exchange tube 7, and a sleeve 8. Wherein, as Figure 1 shown, the housing 1 is provided with a gaseous refrigerant inlet 3, a cooling medium outlet 4, a cooling medium inlet 5, and a liquid refrigerant outlet 6; the first heat exchange tube 7 is arranged inside the housing 1, and its inlet and outlet communicate with the cooling medium inlet 5 and the cooling medium outlet 4 respectively; the sleeve 8 is arranged inside the housing 1 and sleeved outside the first heat exchange tube 7, and a spiral heat exchange channel 12 is formed between the inner wall of the sleeve 8 and the outer wall of the first heat exchange tube 7. The inlet and outlet of the heat exchange channel 12 communicate with the gaseous refrigerant inlet 3 and the liquid refrigerant outlet 6 respectively.

[0038] In this exemplary embodiment, by arranging the first heat exchange tube 7 inside the housing 1 and the sleeve 8 sleeved outside the first heat exchange tube 7, a spiral heat exchange channel 12 is formed between the inner wall of the sleeve 8 and the outer wall of the first heat exchange tube 7. The refrigerant exchanges heat fully with the cooling medium inside the first heat exchange tube 7 in the spiral heat exchange channel 12. The degree of disturbance of the refrigerant by the spiral heat exchange channel 12 increases, the heat exchange effect is enhanced, the heat exchange efficiency is improved, and there is no need to set up baffle plates, thereby eliminating the flow dead zone at the root of the baffle plate and the gaps between the heat exchange tube and the baffle plate, and between the baffle plate and the housing, effectively avoiding the occurrence of cross-flow phenomenon.

[0039] In some embodiments, as Figure 1As shown, the first heat exchange tube 7 and the sleeve 8 are both located at the bottom of the housing 1. The cooling medium outlet 4 is located above the same side as the cooling medium inlet 5. The first heat exchange tube 7 and the sleeve 8 are located in the subcooling zone at the bottom of the condenser, effectively improving the heat exchange efficiency. In some embodiments, the condenser further includes two tube sheets 2 and a plurality of second heat exchange tubes 11 disposed in the housing 1. The first heat exchange tube 7 and the second heat exchange tubes 11 are both disposed on the tube sheets 2. The second heat exchange tubes 11 are located above the first heat exchange tube 7. The second heat exchange tubes 11 are located in the condensation zone of the condenser. The gaseous refrigerant entering from the gaseous refrigerant inlet 3 becomes a liquid refrigerant after being condensed in the upper half of the condenser and enters the heat exchange channel 12 for sufficient heat exchange to achieve the purpose of subcooling. The subcooled liquid refrigerant flows out from the heat exchange channel 12 to the liquid refrigerant outlet 6, forming a reasonable and effective heat exchange gradient, effectively improving the utilization rate of the cooling medium, and having high feasibility.

[0040] Regarding how to form a spiral heat exchange channel, in some embodiments, such as Figure 3 As shown, the inner wall of the sleeve 8 is provided with a spiral groove or protrusion for forming the heat exchange channel 12, which improves heat exchange without changing the structure of the first heat exchange tube 7 itself, making the sleeve 8 have a higher inclusiveness for the structural form of the inner tube and having high feasibility. In some embodiments, the cross-section of the spiral groove is triangular, rectangular or circular, which is beneficial to heat exchange. The pitch of the spiral groove can be appropriately adjusted according to the length and number of the first heat exchange tubes 7. In some embodiments, the pitch of the spiral groove is 1 mm to 10 mm.

[0041] In some embodiments, such as Figure 3 As shown, the difference between the inner diameter D1 of the sleeve 8 and the outer diameter of the first heat exchange tube 7 is 0.5 mm to 2.5 mm. Practical verification shows that the heat exchange efficiency is relatively high. Similarly, in some embodiments, the wall thickness of the sleeve 8 is equal to the wall thickness of the first heat exchange tube 7, which can also improve the heat exchange efficiency.

[0042] To improve the heat exchange efficiency and the utilization rate of the cooling medium, in some embodiments, the heat exchange channels 12 are distributed on both sides of the liquid refrigerant outlet 6. In some embodiments, such as Figure 2 and Figure 5 As shown, there are multiple first heat exchange tubes 7 arranged in multiple rows with offset positions, and the layout is reasonable. Similarly, as shown in Figure 2 There are multiple second heat exchange tubes 11 arranged in multiple rows with offset positions.

[0043] To prevent the refrigerant from directly entering the liquid refrigerant outlet 6 without passing through the heat exchange channel, in some embodiments, such as Figure 1 and Figure 4As shown, the condenser further includes a support tube 9 and a support plate 10 disposed in the housing 1. The support plate 10 is disposed in the support tube 9 and is used to support the sleeve 8. While supporting the sleeve 8, the support plate 10 effectively prevents the refrigerant from directly entering the liquid refrigerant outlet 6 without passing through the heat exchange channel, thereby improving the heat exchange stability.

[0044] The distance between the sleeves 8 should be determined according to the outer diameter D2 of the sleeves 8. In some embodiments, the aperture diameter D3 of the holes in the support plate 10 = D2 + 1 mm; in some embodiments, on the premise of ensuring the structural stability and heat exchange, the hole bridge spacing d = 2 mm to 4 mm, and thus the hole spacing L is determined.

[0045] Some embodiments of the present disclosure provide an air conditioning device including the aforementioned condenser. The air conditioning device of the present disclosure correspondingly also has the above-mentioned beneficial technical effects.

[0046] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0047] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A condenser, characterized in that, Comprising: A housing (1) provided with a gaseous refrigerant inlet (3), a cooling medium outlet (4), a cooling medium inlet (5), and a liquid refrigerant outlet (6); A first heat exchange tube (7) disposed within the housing (1), the inlet and outlet of which communicate with the cooling medium inlet (5) and the cooling medium outlet (4) respectively; and A sleeve (8) disposed within the housing (1) and sleeved outside the first heat exchange tube (7); Wherein, a spiral heat exchange channel (12) is formed between the inner wall of the sleeve (8) and the outer wall of the first heat exchange tube (7), the inlet and outlet of the heat exchange channel (12) communicate with the gaseous refrigerant inlet (3) and the liquid refrigerant outlet (6) respectively. The condenser further includes a support tube (9) and a support plate (10) disposed within the housing (1), the support plate (10) is disposed within the support tube (9) for supporting the sleeve (8).

2. The condenser according to claim 1, characterized in that, Both the first heat exchange tube (7) and the sleeve (8) are located at the bottom of the housing (1).

3. The condenser according to claim 1, wherein The inner wall of the sleeve (8) is provided with spiral grooves or protrusions for forming the heat exchange channel (12).

4. The condenser according to claim 3, characterized in that, The cross-section of the spiral groove is triangular or rectangular.

5. The condenser according to claim 3, characterized in that The pitch of the spiral groove is 1 mm to 10 mm.

6. The condenser according to claim 1, characterized in that, The difference between the inner diameter of the sleeve (8) and the outer diameter of the first heat exchange tube (7) is 0.5 mm to 2.5 mm.

7. The condenser according to claim 1, characterized in that, The wall thickness of the sleeve (8) is equal to the wall thickness of the first heat exchange tube (7).

8. The condenser according to claim 2, wherein It further includes two tube sheets (2) and a plurality of second heat exchange tubes (11) disposed within the housing (1), the first heat exchange tube (7) and the second heat exchange tubes (11) are both disposed on the tube sheets (2), and the second heat exchange tubes (11) are located above the first heat exchange tube (7).

9. The condenser according to claim 1, wherein There are multiple first heat exchange tubes (7) arranged in multiple rows with staggered positions.

10. The condenser according to claim 1, wherein The heat exchange channels (12) are distributed on both sides of the liquid refrigerant outlet (6).

11. An air conditioning device, characterized in that, Comprising the condenser according to any one of claims 1 to 10.

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