Fin type heat exchanger structure and heat pump device

Abstract

The embodiment of the utility model provides a fin type heat exchanger structure and a heat pump device, and relates to the field of heat exchanger structures. The fin type heat exchanger structure comprises a heat exchange tube set, a first liquid separation capillary tube, a second liquid separation capillary tube and a double-nozzle one-way valve, the first liquid separation capillary tube is communicated with the lower portion of the heat exchange tube set, the second liquid separation capillary tube is communicated with the area outside the lower portion of the heat exchange tube set, and the double-nozzle one-way valve is arranged on the first liquid separation capillary tube. And the one-way valve is used for conducting the first liquid separation capillary tube in a one-way mode, so that the flowing paths of liquid in the first liquid separation capillary tube are different under the condition of a heating mode or a defrosting mode. Therefore, the resistance of the liquid in different modes is adjusted, the flow of the liquid reaching the lower portion of the heat exchange tube set is adjusted, the defrosting effect of the lower portion of the heat exchange tube set is improved, and the performance of the fin heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger structures, in particular to a fin heat exchanger structure and a heat pump device. Background Art

[0002] Air source heat pumps can extract free heat energy from the air. They only need a small amount of electricity to drive them, and can provide heat energy several times the input electricity, greatly improving energy utilization efficiency and reducing energy consumption and operating costs. As an indispensable component of air source heat pumps, fin heat exchangers have a critical impact on their performance. In low temperature environments, fin heat exchangers are used as evaporators. When the temperature of the heat exchanger fins is lower than the dew point temperature of the air and lower than 0°C, the water vapor in the air will condense and freeze on the surface of the fins to form a frost layer. The formation of a frost layer will reduce the heat exchange efficiency: the formation of a frost layer will block the gaps between the fins, increase the resistance to air flow, reduce air flow, and thus reduce the heat exchange efficiency between the fin heat exchanger and the outside air. This directly reduces the ability of the heat pump to absorb heat from the air, affecting the heating effect.

[0003] The fin heat exchanger in the prior art has the technical problem that the defrosting effect of the heat exchange tube located at the bottom is not good. Utility Model Content

[0004] The utility model provides a fin heat exchanger structure and a heat pump device, which can improve the defrosting effect of the heat exchange tube at the bottom and improve the performance of the fin heat exchanger.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The embodiment of the utility model provides a fin heat exchanger structure, which includes:

[0007] Heat exchange tube group;

[0008] a first liquid separation capillary, the first liquid separation capillary being connected to the lower portion of the heat exchange tube group;

[0009] a second liquid separation capillary tube, the second liquid separation capillary tube being in communication with a region other than a lower portion of the heat exchange tube group;

[0010] A double-mouth one-way valve component is arranged on the first liquid separation capillary tube and is used to unidirectionally conduct the first liquid separation capillary tube so that the flow path of the liquid in the first liquid separation capillary tube is different in the heating mode or the defrosting mode.

[0011] Optionally, the double-nozzle one-way valve component includes a conducting nozzle, a first conducting pipe and a second conducting pipe, the first conducting pipe and the second conducting pipe are both connected to the conducting nozzle, and the conducting nozzle is used to unidirectionally conduct the first conducting pipe and the second conducting pipe, so that the flow path of the liquid is different in the heating mode or the defrost mode.

[0012] Optionally, the conducting nozzle includes a first interface and a second interface that are connected to each other, the first interface simultaneously connects one end of the first conducting tube and the second conducting tube, and the second interface simultaneously connects the other end of the first conducting tube and the second conducting tube.

[0013] Optionally, the second interface is provided with a check piece, and the check piece is used to block the liquid from entering the second conducting tube from the first liquid-dispensing capillary, so that the liquid flows in one direction.

[0014] Optionally, the heat exchange tube group includes a plurality of heat exchange tubes, which are arranged in a vertical direction, the first liquid separation capillary is connected to the heat exchange tube located at the bottom, and the second liquid separation capillary is connected to the heat exchange tube outside the bottom area.

[0015] Optionally, there are multiple second liquid separation capillaries, and each of the second liquid separation capillaries is connected to the heat exchange tube.

[0016] Optionally, the fin heat exchanger structure also includes a liquid tube and a liquid separator, the liquid separator is connected to the liquid tube, and the liquid separator is simultaneously connected to the first liquid separator capillary and the second liquid separator capillary, and the liquid separator is used to divert the liquid in the liquid tube to the first liquid separator capillary and the second liquid separator capillary.

[0017] Optionally, the fin heat exchanger structure further includes fins, and the fins are located outside the heat exchange tube group.

[0018] Optionally, the fin heat exchanger structure further includes an air pipe, and the air pipe is connected to the heat exchange tube group.

[0019] An embodiment of the utility model further provides a heat pump device, comprising the above-mentioned fin heat exchanger structure.

[0020] The beneficial effects of the fin heat exchanger structure and heat pump device of the embodiment of the utility model include, for example:

[0021] The fin heat exchanger structure includes a heat exchange tube group, a first liquid separation capillary, a second liquid separation capillary and a double-nozzle one-way valve component. The first liquid separation capillary is connected to the lower part of the heat exchange tube group, and the second liquid separation capillary is connected to the area other than the lower part of the heat exchange tube group. The double-nozzle one-way valve component is arranged on the first liquid separation capillary and is used to unidirectionally conduct the first liquid separation capillary, so that the flow path of the liquid in the first liquid separation capillary is different in the heating mode or the defrosting mode. When in use, the first liquid-separating capillary is connected to the lower part of the heat exchange tube group, and the second liquid-separating capillary is connected to the area outside the lower part of the heat exchange tube group. A double-nozzle one-way valve is provided on the first liquid-separating capillary, which can unidirectionally conduct the first liquid-separating capillary, so that when the fin heat exchanger structure is in heating mode or hot and cold mode, the flow paths of liquids of different temperatures in the first liquid-separating capillary are different, thereby adjusting the resistance of the liquid in different modes, thereby adjusting the flow rate of the liquid reaching the lower part of the heat exchange tube group, thereby improving the defrosting effect of the lower part of the heat exchange tube group and improving the performance of the fin heat exchanger.

[0022] The heat pump device includes a fin heat exchanger structure. When in use, the first liquid-separating capillary is connected to the lower part of the heat exchange tube group, and the second liquid-separating capillary is connected to the area outside the lower part of the heat exchange tube group. The first liquid-separating capillary is provided with a double-mouth one-way valve component, which can unidirectionally conduct the first liquid-separating capillary, so that when the fin heat exchanger structure is in a heating mode or a hot and cold mode, liquids of different temperatures have different flow paths in the first liquid-separating capillary, thereby adjusting the resistance of the liquid in different modes, thereby adjusting the flow rate of the liquid reaching the lower part of the heat exchange tube group, thereby improving the defrosting effect of the lower part of the heat exchange tube group and improving the performance of the fin heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of the fin heat exchanger structure provided in this embodiment;

[0025] Figure 2 A schematic diagram of the structure of the double-mouth one-way valve provided in this embodiment in the heating mode;

[0026] Figure 3 This is a schematic structural diagram of the double-nozzle one-way valve provided in this embodiment in the defrost mode.

[0027] Icons: 10-heat exchange tube group; 11-heat exchange tube; 20-first liquid separation capillary; 30-second liquid separation capillary; 40-double-nozzle one-way valve; 41-conducting nozzle; 411-first interface; 412-second interface; 42-first conducting pipe; 43-second conducting pipe; 50-liquid pipe; 60-liquid distributor; 70-fin; 80-air pipe; 100-fin heat exchanger structure. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0032] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0034] Air source heat pumps can extract free heat energy from the air. They only need a small amount of electricity to drive them, and can provide heat energy several times the input electricity, greatly improving energy utilization efficiency and reducing energy consumption and operating costs. As an indispensable component of air source heat pumps, fin heat exchangers have a critical impact on their performance. In low temperature environments, fin heat exchangers are used as evaporators. When the temperature of the heat exchanger fins is lower than the dew point temperature of the air and lower than 0°C, the water vapor in the air will condense and freeze on the surface of the fins to form a frost layer. The formation of a frost layer will reduce the heat exchange efficiency: the formation of a frost layer will block the gaps between the fins, increase the resistance to air flow, reduce air flow, and thus reduce the heat exchange efficiency between the fin heat exchanger and the outside air. This directly reduces the ability of the heat pump to absorb heat from the air, affecting the heating effect.

[0035] The fin heat exchanger in the related art has a technical problem that the defrosting effect of the heat exchange tube 11 located at the bottom is not good.

[0036] Please refer to Figure 1-Figure 3 This embodiment provides a heat pump device, which includes a fin heat exchanger structure 100. The heat pump device can effectively improve the above-mentioned technical problems, improve the defrosting effect of the heat exchange tube 11 at the bottom, and improve the performance of the fin heat exchanger.

[0037] The fin heat exchanger structure 100 includes a heat exchange tube group 10, a first liquid separation capillary 20, a second liquid separation capillary 30 and a double-nozzle one-way valve component 40. The first liquid separation capillary 20 is connected to the lower part of the heat exchange tube group 10, and the second liquid separation capillary 30 is connected to the area outside the lower part of the heat exchange tube group 10. The double-nozzle one-way valve component 40 is arranged on the first liquid separation capillary 20, and is used to unidirectionally conduct the first liquid separation capillary 20, so that the flow path of the liquid in the first liquid separation capillary 20 is different in the heating mode or the defrosting mode.

[0038] Specifically, the heat exchange tube group 10 includes a plurality of heat exchange tubes 11, which are arranged in a vertical direction, the first liquid separation capillary 20 is connected to the heat exchange tube 11 located at the bottom, and the second liquid separation capillary 30 is connected to the heat exchange tube 11 outside the bottom area.

[0039] The fin heat exchanger structure 100 further includes a liquid tube 50 and a liquid separator 60, the liquid separator 60 is in communication with the liquid tube 50, and the liquid separator 60 is in communication with the first liquid separator capillary 20 and the second liquid separator capillary 30 at the same time, and the liquid separator 60 is used to separate the liquid in the liquid tube 50 to the first liquid separator capillary 20 and the second liquid separator capillary 30. Specifically, there are a plurality of second liquid separator capillaries 30, and the plurality of second liquid separator capillaries 30 are respectively in communication with the heat exchange tube 11 outside the bottom area.

[0040] Furthermore, the fin heat exchanger structure 100 further includes fins 70 and air pipes 80 . The fins 70 are located outside the heat exchange tube group 10 , and the air pipes 80 are connected to the heat exchange tube group 10 .

[0041] In this embodiment, the double-mouth one-way valve member 40 includes a conducting nozzle 41, a first conducting pipe 42, and a second conducting pipe 43. The first conducting pipe 42 and the second conducting pipe 43 are both connected to the conducting nozzle 41. The conducting nozzle 41 is used to unidirectionally conduct the first conducting pipe 42 and the second conducting pipe 43, so that the flow path of the liquid is different in the heating mode or the defrosting mode. The conducting nozzle 41 includes a first interface 411 and a second interface 412 that are connected to each other. The first interface 411 is connected to one end of the first conducting pipe 42 and the second conducting pipe 43 at the same time, and the second interface 412 is connected to the other end of the first conducting pipe 42 and the second conducting pipe 43 at the same time.

[0042] It should be noted that the first interface 411 is located at the top of the conduction nozzle 41, and the second interface 412 is located at the bottom of the conduction nozzle 41. There are two first interfaces 411, and the two first interfaces 411 are respectively connected to one end of the first conduction tube 42 and the second conduction tube 43. There are two second interfaces 412, and the two second interfaces 412 are respectively connected to the other ends of the first conduction tube 42 and the second conduction tube 43. Among them, the second interface 412 is provided with a check piece, which is used to prevent the liquid from entering the second conduction tube 43 from the first liquid separation capillary 20, so that the liquid flows in one direction.

[0043] Figure 2 A schematic diagram of the liquid flow in the double-mouth one-way valve component 40 in the heating mode is shown. In the heating mode, the refrigerant enters the first conducting pipe 42, passes through the two first interfaces 411, enters the second conducting pipe 43, then passes through the two second interfaces 412 to continue to flow to the first liquid separation capillary 20, and finally enters the heat exchange tube 11 at the bottom, and finally flows to the gas pipe 80.

[0044] It can be understood that in the heating mode, the total length of the path through which the refrigerant flows is the sum of the length of the first conducting pipe 42 and the length of the second conducting pipe 43 .

[0045] Figure 3 The schematic diagram of liquid flow in the double-nozzle one-way valve component 40 in the defrost mode is shown. In the defrost mode, the high-temperature refrigerant flows from the gas pipe 80 to the heat exchange tube 11, and enters the first liquid separation capillary 20 through the heat exchange tube 11. Since a check member is provided in the second interface 412, the refrigerant cannot enter the second conducting tube 43 through the second interface 412. Therefore, the liquid in the first liquid separation capillary 20 can only flow to the first interface 411 via the second interface 412, and enter the first conducting tube 42 through the first interface 411, and then merge with the refrigerant flowing out of the second liquid separation capillary 30, and finally flow to the liquid pipe 50 together.

[0046] In the defrost mode, the total length of the path through which the refrigerant flows is the length of the first conducting pipe 42 .

[0047] It should be noted that in the heat exchange tube group 10, since the air side wind speed corresponding to the heat exchange tube 11 located at the bottom is usually the lowest and the heat exchange capacity on the wind side is relatively weakest, the frost layer formed on the heat exchange tube 11 located at the bottom is usually the thickest. In order to ensure the consistency of the refrigerant state at the outlet of each heat exchange tube 11, it is usually necessary to increase the length of the bottom layer separation capillary to increase the resistance to the refrigerant flow, so as to achieve the purpose of reducing the refrigerant flow distributed to the bottom layer heat exchange tube 11 and avoid incomplete evaporation of the refrigerant and liquid at the outlet. However, although increasing the length of the bottom liquid separation capillary can make the refrigerant states at the outlets of each heat exchange tube 11 relatively consistent during the heating operation, during the defrosting process, because the resistance of the bottom liquid separation capillary is greater than that of other capillaries, the refrigerant flow rate of the high-temperature refrigerant gas from the compressor exhaust port distributed to the bottom heat exchange tube 11 will be lower than that of other heat exchange tubes 11, resulting in the slowest temperature rise of the bottom heat exchange tube 11; and because the frost layer on the bottom heat exchange tube 11 is in the process of melting, the low-temperature melt water forms and pours down on the surface of the bottom heat exchange tube 11 due to gravity, making it more difficult to defrost the bottom of the fin heat exchanger. After the defrosting process under low-temperature conditions is completed, it is easy for the upper layer of the fin heat exchanger to be defrosted cleanly, but there is still frost on the bottom of the lower layer. After a long period of periodic accumulation, the bottom of the fin heat exchanger may produce "ice climbing" phenomenon, which not only affects the heat exchanger performance of the fin heat exchanger, but in severe cases may even cause leakage of the bottom heat exchange tube 11 due to ice squeezing. In order to solve this technical problem, in this embodiment, the total length of the path through which the refrigerant flows in the heating mode is the sum of the length of the first conducting tube 42 and the length of the second conducting tube 43, and the total length of the path through which the refrigeration flows in the defrosting mode is the length of the first conducting tube 42. In the heating mode, the path through which the refrigerant flows is longer, which can increase the resistance to the flow of the refrigerant, thereby reducing the refrigerant flow reaching the heat exchange tube 11 at the bottom, ensuring the consistency of the refrigerant state at the outlet of each heat exchange tube 11; and in the defrosting mode, the path through which the refrigerant flows is shorter, which can reduce the flow resistance of the refrigerant, thereby increasing the refrigerant flow reaching the heat exchange tube 11 at the bottom, thereby improving the defrosting effect of the heat exchange tube 11 at the bottom.

[0048] In summary, the embodiments of the utility model provide a fin heat exchanger structure 100 and a heat pump device, wherein the fin heat exchanger structure 100 includes a heat exchange tube group 10, a first liquid separation capillary 20, a second liquid separation capillary 30 and a double-nozzle one-way valve component 40, the first liquid separation capillary 20 is connected to the lower part of the heat exchange tube group 10, the second liquid separation capillary 30 is connected to the area outside the lower part of the heat exchange tube group 10, and the double-nozzle one-way valve component 40 is arranged on the first liquid separation capillary 20, which is used to unidirectionally guide the first liquid separation capillary 20, so that the flow path of the liquid in the first liquid separation capillary 20 is different in the heating mode or the defrosting mode. When in use, the first liquid-separating capillary 20 is connected to the lower part of the heat exchange tube group 10, and the second liquid-separating capillary 30 is connected to the area outside the lower part of the heat exchange tube group 10. The first liquid-separating capillary 20 is provided with a double-mouth one-way valve component 40, which can unidirectionally conduct the first liquid-separating capillary 20, so that when the fin heat exchanger structure 100 is in heating mode or hot and cold mode, liquids of different temperatures have different flow paths in the first liquid-separating capillary 20, thereby adjusting the resistance of the liquid in different modes, thereby adjusting the flow rate of the liquid reaching the lower part of the heat exchange tube group 10, thereby improving the defrosting effect of the lower part of the heat exchange tube group 10 and improving the performance of the fin heat exchanger.

[0049] The heat pump device includes a fin heat exchanger structure 100. When in use, the first liquid-separating capillary 20 is connected to the lower part of the heat exchange tube group 10, and the second liquid-separating capillary 30 is connected to the area outside the lower part of the heat exchange tube group 10. The first liquid-separating capillary 20 is provided with a double-mouth one-way valve member 40, which can unidirectionally conduct the first liquid-separating capillary 20, so that when the fin heat exchanger structure 100 is in a heating mode or a hot and cold mode, liquids of different temperatures have different flow paths in the first liquid-separating capillary 20, thereby adjusting the resistance of the liquid in different modes, thereby adjusting the flow rate of the liquid reaching the lower part of the heat exchange tube group 10, thereby improving the defrosting effect of the lower part of the heat exchange tube group 10 and improving the performance of the fin heat exchanger.

[0050] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A fin heat exchanger structure, characterized in that: include: Heat exchange tube group (10); a first liquid separation capillary (20), the first liquid separation capillary (20) being in communication with the lower portion of the heat exchange tube group (10); a second liquid separation capillary (30), the second liquid separation capillary (30) being in communication with an area other than a lower portion of the heat exchange tube group (10); A double-mouth one-way valve component (40) is arranged on the first liquid separation capillary (20) and is used to unidirectionally conduct the first liquid separation capillary (20), so that the flow path of the liquid in the first liquid separation capillary (20) is different in the heating mode or the defrosting mode.

2. The fin heat exchanger structure according to claim 1, characterized in that: The double-mouth one-way valve component (40) comprises a conducting nozzle (41), a first conducting pipe (42) and a second conducting pipe (43); the first conducting pipe (42) and the second conducting pipe (43) are both connected to the conducting nozzle (41); the conducting nozzle (41) is used for unidirectionally conducting the first conducting pipe (42) and the second conducting pipe (43), so that the flow path of the liquid is different in the heating mode or the defrosting mode.

3. The fin heat exchanger structure according to claim 2, characterized in that: The conducting nozzle (41) comprises a first interface (411) and a second interface (412) which are connected to each other, wherein the first interface (411) is connected to one end of the first conducting tube (42) and the second conducting tube (43) at the same time, and the second interface (412) is connected to the other end of the first conducting tube (42) and the second conducting tube (43) at the same time.

4. The fin heat exchanger structure according to claim 3, characterized in that: The second interface (412) is provided with a check piece, and the check piece is used to prevent liquid from entering the second conducting tube (43) from the first liquid-dispensing capillary (20), so that the liquid flows in one direction.

5. The fin heat exchanger structure according to claim 1, characterized in that: The heat exchange tube group (10) comprises a plurality of heat exchange tubes (11), wherein the plurality of heat exchange tubes (11) are arranged in a vertical direction, the first liquid separation capillary (20) is connected to the heat exchange tube (11) located at the bottom, and the second liquid separation capillary (30) is connected to the heat exchange tube (11) outside the bottom area.

6. The fin heat exchanger structure according to claim 5, characterized in that: There are a plurality of second liquid separation capillaries (30), and each of the second liquid separation capillaries (30) is connected to the heat exchange tube (11).

7. The fin heat exchanger structure according to claim 1, characterized in that: The fin heat exchanger structure (100) further comprises a liquid tube (50) and a liquid separator (60), wherein the liquid separator (60) is connected to the liquid tube (50), and the liquid separator (60) is simultaneously connected to the first liquid separator capillary (20) and the second liquid separator capillary (30), and the liquid separator (60) is used to separate the liquid in the liquid tube (50) to the first liquid separator capillary (20) and the second liquid separator capillary (30).

8. The fin heat exchanger structure according to claim 1, characterized in that: The fin heat exchanger structure (100) further comprises fins (70), wherein the fins (70) are located outside the heat exchange tube group (10).

9. The fin heat exchanger structure according to claim 1, characterized in that: The fin heat exchanger structure (100) further comprises an air pipe (80), wherein the air pipe (80) is in communication with the heat exchange tube group (10).

10. A heat pump device, characterized in that: The invention comprises the fin heat exchanger structure as described in any one of claims 1 to 9.

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