Variable flow path fin and heat pump air conditioner thereof
By adopting a combined design of electronic expansion valve and solenoid two-way valve in heat pump air conditioner, combined with fan and temperature sensor, the difficulty of defrosting and high pressure problems of flow path fins in traditional heat pump air conditioners is solved, and a safe, reliable and energy-saving defrosting effect is achieved.
Patent Information
- Application Number
- CN202421617964.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-09
AI Technical Summary
Traditional heat pump air conditioners have a problem of serial flow of one-way valves in the flow path fin design, which leads to difficulty in defrost and uncleanness, and may lead to high pressure of the unit and reduce safety and reliability.
The combined design of the first electronic expansion valve and the solenoid two-way valve is adopted to avoid streaming. By setting the first fin as a supercooled flow path, the first fan is turned on separately, and combining the temperature sensor and the control unit to achieve step-by-step removal of the frost layer.
It solves the difficulty of defrosting of the flow path fins, ensures that the defrosting is clean, safe and reliable, reduces the risk of high pressure, and improves the energy saving and control simplicity of the air conditioner.
Smart Images
Figure CN223050117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat pump air conditioners, in particular to a variable flow path fin and a heat pump air conditioner thereof. Background Art
[0002] In the design process of the variable flow path fin of the traditional heat pump air conditioner, a method of using multiple one-way valves to cooperate with multi-pipeline connection fins is often used. However, the one-way valve is not completely reasonable in the system flow path design. When the pressure difference is too small, problems such as confluence or cross-flow of the one-way valve will occur.
[0003] In the system with variable flow path design, cross-flow will make it more difficult for the unit to defrost. The placement of the coil temperature point and the method for determining the completion of the whole machine defrosting are more demanding, resulting in incomplete defrosting and difficulty in exiting the defrosting. Moreover, cross-flow may also cause a high-pressure situation in the variable flow path part of the unit after defrosting, reducing the safety and reliability of the unit. Summary of the Utility Model
[0004] Based on this, the purpose of the utility model is to provide a variable flow path fin. By setting the first electronic expansion valve, the cross-flow problem that occurs in the traditional one-way valve in the refrigeration and defrosting modes is avoided, the difficulty of fin defrosting is reduced, and when defrosting, the frost layer of the first fin can be removed first, and then the frost layer of the second fin can be removed, solving the defrosting problem of the variable flow path fin, and having the advantages of clean defrosting, safety and reliability, and simple control.
[0005] A variable flow path fin, comprising a first fin, a second fin, a first gas collecting pipe, a one-way valve, a second gas collecting pipe, a gas collecting main pipe, a first distributor, a second distributor, a first liquid separating pipe, a second liquid separating pipe, a liquid separating main pipe, a third liquid separating pipe, a first electronic expansion valve and an electromagnetic two-way valve; the first fin is located above the second fin, the number of flow paths of the first fin < the number of flow paths of the second fin, the side wall of the first gas collecting pipe is communicated with the interface at one end of the first fin, one end of the first gas collecting pipe is closed, the other end of the first gas collecting pipe is communicated with the input end of the one-way valve, the output end of the one-way valve is communicated with one end of the second gas collecting pipe, the side wall of the second gas collecting pipe is communicated with the interface at one end of the second fin, and the other end of the second gas collecting pipe is communicated with one end of the gas collecting main pipe; one end of the first distributor is communicated with the interface at the other end of the first fin, the second distributor is communicated with the interface at the other end of the second fin, one end of the first liquid separating pipe is communicated with the other end of the first distributor, one end of the second liquid separating pipe is communicated with the other end of the second distributor, the other ends of the first liquid separating pipe and the second liquid separating pipe are both communicated with one end of the liquid separating main pipe, one end of the third liquid separating pipe is communicated with the other end of the second distributor, the other end of the third liquid separating pipe is communicated with the first gas collecting pipe, the first electronic expansion valve is located on the second liquid separating pipe, and the electromagnetic two-way valve is located on the third liquid separating pipe.
[0006] The variable flow path fin of the present utility model, by setting the first electronic expansion valve, avoids the cross-flow problem that occurs in the traditional one-way valve in the refrigeration and defrosting modes, reduces the difficulty of fin defrosting, and can first remove the frost layer on the first fin and then remove the frost layer on the second fin during defrosting, solving the defrosting problem of the variable flow path fin; it has the advantages of clean defrosting, safety and reliability, and simple control.
[0007] Further, the ratio of the number of flow paths of the first fin to the number of flow paths of the second fin = (2 - 3):(5 - 8). The first fin functions as a subcooling flow path, and fewer subcooling flow paths are more suitable for low-temperature working conditions.
[0008] Further, the ratio of the number of flow paths of the first fin to the number of flow paths of the second fin = 2:5. The disclosed implementation manner.
[0009] Further, it further includes a first fan, the first fan is fixedly installed and covered on the side of the first fin, and the output end of the first fan is arranged towards the side of the first fin. By setting the first fan and separately turning on the first fan during defrosting, it can effectively avoid high pressure caused by too long flow paths during defrosting.
[0010] Further, it further includes a second fan, the second fan is fixedly sleeved on the side of the second fin, and the output end of the second fan is arranged towards the side of the second fin. By providing the second fan, the first fan and the second fan are used to replace the conventional fan integrally arranged by covering the first fin and the second fin, thus saving costs.
[0011] Further, it further includes a second electronic expansion valve, and the second electronic expansion valve is located on the first liquid distributor pipe. By providing the second electronic expansion valve, the number of heat exchange flow paths can be adjusted in the heating mode, increasing the adjustability of the variable flow path fins and making the air conditioner more energy-efficient.
[0012] Further, it further includes a temperature sensor, and the temperature sensor is fixed to the lower fin. By providing the temperature sensor on the lower fin, the system can determine whether to enter and exit the defrosting mode according to the temperature detected by the temperature sensor, increasing the reliability of defrosting.
[0013] Further, the inner diameter of the pipe connecting the first electronic expansion valve > the inner diameter of the pipe connecting the second electronic expansion valve.
[0014] Further, it further includes a control unit, and the control unit is electrically connected to the first electronic expansion valve and the electromagnetic two-way valve. The control unit can open the first electronic expansion valve, adjust the opening degree of the first electronic expansion valve, close the first electronic expansion valve, open and close the electromagnetic two-way valve, facilitating the control of each valve.
[0015] The present utility model further provides a heat pump air conditioner, including a variable flow path fin as described in any one of the above.
[0016] The beneficial effects of this application are as follows:
[0017] 1. By providing the first electronic expansion valve, the problem of cross-flow that occurs in the traditional one-way valve in the refrigeration and defrosting modes is avoided, reducing the difficulty of fin defrosting, and being able to first remove the frost layer on the first fin and then remove the frost layer on the second fin during defrosting, solving the defrosting problem of the variable flow path fins.
[0018] 2. The first fin functions as a subcooling flow path, and fewer subcooling flow paths are more suitable for low-temperature working conditions.
[0019] 3. By providing the first fan, the first fan can be independently turned on during defrosting, effectively avoiding high pressure caused by too long flow paths during defrosting.
[0020] 4. By providing the second fan, the first fan and the second fan are used to replace the conventional fan integrally arranged by covering the first fin and the second fin, thus saving costs.
[0021] 5. A second electronic expansion valve is provided to adjust the number of heat exchange flow paths in the heating mode, increasing the adjustability of the variable flow path fins and making the air conditioner more energy-efficient.
[0022] 6. A temperature sensor is provided on the lower fins, enabling the system to determine whether to enter and exit the defrost mode based on the temperature detected by the temperature sensor, enhancing the reliability of defrosting.
[0023] 7. The control unit can open the first electronic expansion valve, adjust the opening degree of the first electronic expansion valve, close the first electronic expansion valve, and open and close the electromagnetic two-way valve, facilitating the control of each valve.
[0024] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings
[0025] Figure 1 Schematic structural diagram of the variable flow path fins according to an embodiment;
[0026] Figure 2 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the refrigeration mode according to an embodiment;
[0027] Figure 3 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the heating mode according to an embodiment;
[0028] Figure 4 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the defrost mode according to an embodiment;
[0029] Figure 5 Schematic structural diagram of the variable flow path fins according to an embodiment;
[0030] Figure 6 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the refrigeration mode according to an embodiment;
[0031] Figure 7 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the heating mode according to an embodiment;
[0032] Figure 8 Schematic diagram of the refrigerant flow direction of the variable flow path fins in the defrost mode according to an embodiment;
[0033] Wherein, the first fin 1, the second fin 2, the first gas collector 3, the check valve 4, the second gas collector 5, the gas collecting main pipe 6, the first distributor 7, the second distributor 8, the first liquid dividing pipe 9, the second liquid dividing pipe 10, the liquid dividing main pipe 11, the third liquid dividing pipe 12, the first electronic expansion valve 13, the electromagnetic two-way valve 14, and the second electronic expansion valve 15. Detailed Embodiment
[0034] It should be clear that the described embodiments are only some of the embodiments of the embodiments of this application, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the embodiments of this application without creative efforts belong to the scope protected by the embodiments of this application.
[0035] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of this application. The singular forms "a", "the", and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0036] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0037] In addition, in the description of this application, unless otherwise specified, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.
[0038] It should be understood that the embodiments of this application are not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the embodiments of this application is only limited by the appended claims.
[0039] An embodiment of the present utility model provides a variable flow path fin, please refer to Figure 1, including a first fin 1, a second fin 2, a first gas collecting pipe 3, a one-way valve 4, a second gas collecting pipe 5, a gas collecting main pipe 6, a first distributor 7, a second distributor 8, a first liquid separating pipe 9, a second liquid separating pipe 10, a liquid separating main pipe 11, a third liquid separating pipe 12, a first electronic expansion valve 13 and an electromagnetic two-way valve 14; the first fin 1 is located above the second fin 2, the number of flow paths of the first fin 1 < the number of flow paths of the second fin 2, the side wall of the first gas collecting pipe 3 is communicated with the interface at one end of the first fin 1, one end of the first gas collecting pipe 3 is closed, the other end of the first gas collecting pipe 3 is communicated with the input end of the one-way valve 4, the output end of the one-way valve 4 is communicated with one end of the second gas collecting pipe 5, the side wall of the second gas collecting pipe 5 is communicated with the interface at one end of the second fin 2, the other end of the second gas collecting pipe 5 is communicated with one end of the gas collecting main pipe 6; one end of the first distributor 7 is communicated with the interface at the other end of the first fin 1, the second distributor 8 is communicated with the interface at the other end of the second fin 2, one end of the first liquid separating pipe 9 is communicated with the other end of the first distributor 7, one end of the second liquid separating pipe 10 is communicated with the other end of the second distributor 8, the other end of the first liquid separating pipe 9 and the other end of the second liquid separating pipe 10 are both communicated with one end of the liquid separating main pipe 11, one end of the third liquid separating pipe 12 is communicated with the other end of the second distributor 8, the other end of the third liquid separating pipe 12 is communicated with the first gas collecting pipe 3, the first electronic expansion valve 13 is located on the second liquid separating pipe 10, and the electromagnetic two-way valve 14 is located on the third liquid separating pipe 12. A variable flow path fin of an embodiment of the present invention includes three modes: a refrigeration mode, a heating mode and a defrosting mode. In the refrigeration mode, please refer to Figure 2 , the electromagnetic two-way valve 14 is opened, the first electronic expansion valve 13 is closed, the high-pressure gas discharged from the compressor enters from the other end of the gas collecting main pipe 6 and passes through the second fin 2, the second distributor 8, the third liquid separating pipe 12, the first gas collecting pipe 3, the first fin 1, the first distributor 7, the first liquid separating pipe 9 in sequence, and finally flows back to the compressor from the liquid separating main pipe 11; in the heating mode, please refer to Figure 3 , the first electronic expansion valve 13 is opened, the electronic two-way valve is closed, the high-pressure liquid enters from the liquid separating main pipe 11 and flows into the first liquid separating pipe 9 and the second liquid separating pipe 10 respectively, then flows into the first fin 1 and the second fin 2, then flows into the first gas collecting pipe 3 and the second gas collecting pipe 5, and finally flows out from the gas collecting main pipe 6. In some cases, the control will also close the first electronic expansion valve 13 according to the heating demand or other regulatory requirements; in the defrosting mode, please refer to Figure 4, the electromagnetic two-way valve 14 opens, the first electronic expansion valve 13 closes, and the flow path is similar to the refrigeration mode. High-pressure gas enters from the gas collecting main pipe 6 and flows out from the liquid separation main pipe 11 after heat exchange. By setting the first electronic expansion valve 13 in the variable flow path fin of the embodiment of the present utility model, the cross-flow problem that occurs in the traditional one-way valve 4 in the refrigeration and defrosting modes is avoided, the difficulty of fin defrosting is reduced, and the frost layer of the first fin 1 can be removed first and then the frost layer of the second fin 2 can be removed during defrosting, solving the defrosting problem of the variable flow path fin, and having the advantages of clean defrosting, safety and reliability, and simple control.
[0040] In one embodiment, the number of flow paths of the first fin 1: the number of flow paths of the second fin 2 = (2 - 3):(5 - 8). The first fin 1 functions as a subcooling flow path, and fewer subcooling flow paths are more suitable for low-temperature working conditions.
[0041] In one embodiment, the number of flow paths of the first fin 1: the number of flow paths of the second fin 2 = 2:5.
[0042] In order to improve the practicability of the defrosting mode, in one embodiment, the variable flow path fin further includes a first blower, and the first blower is fixedly arranged on the side of the first fin 1 in a covering manner, and the output end of the first blower is arranged towards the side of the first fin 1. By setting the first blower and separately turning on the first blower during defrosting, it can effectively avoid high pressure caused by too long flow paths during defrosting.
[0043] In order to reduce the cost of the product, in one embodiment, the variable flow path fin further includes a second blower, and the second blower is fixedly arranged on the side of the second fin 2 in a covering manner, and the output end of the second blower is arranged towards the side of the second fin 2. By setting the second blower, the first blower and the second blower are used to replace the blower integrally arranged by covering the first fin 1 and the second fin 2 conventionally, saving costs.
[0044] In order to make the variable flow path fin more energy-efficient in the heating mode, in one embodiment, please refer to Figure 5 , the variable flow path fin further includes a second electronic expansion valve 15, and the second electronic expansion valve 15 is located on the first liquid separation pipe 9. By setting the second electronic expansion valve 15, the number of flow paths participating in heat exchange can be adjusted in the heating mode, increasing the adjustability of the variable flow path fin and making the air conditioner more energy-efficient.
[0045] In order to improve the timeliness of defrosting, in one embodiment, the variable flow path fin further includes a temperature sensor, and the temperature sensor is fixed to the lower fin. By arranging the temperature sensor on the lower fin, the system can judge whether to enter and exit the defrosting mode according to the temperature detected by the temperature sensor, increasing the reliability of defrosting.
[0046] In one embodiment, the inner diameter of the connecting pipe of the first electronic expansion valve 13 > the inner diameter of the connecting pipe of the second electronic expansion valve 15.
[0047] In order to improve the convenience of regulating the variable flow path fins, in one embodiment, the variable flow path fins further include a control unit, which is electrically connected to the first electronic expansion valve 13, the second electronic expansion valve 15, the first fan, the second fan, the temperature sensor, and the electromagnetic two-way valve 14. The control unit can receive the user's refrigeration mode command, heating mode command, and defrost mode command. The control unit can turn on and off the first electronic expansion valve 13, the second electronic expansion valve 15, the electromagnetic two-way valve 14, the first fan, and the second fan. The control unit can also adjust the opening degrees of the first electronic expansion valve 13 and the second expansion valve. The control unit can also obtain the temperature detected by the temperature sensor. The control unit can also adjust the rotation speeds of the first fan and the second fan. In the refrigeration mode, please refer to Figure 6 , the control unit receives the refrigeration mode command, and then controls the first fan, the second fan, the electromagnetic two-way valve 14, and the second electronic expansion valve 15 to turn on, and controls the first electronic expansion valve 13 to turn off; In the heating mode, please refer to Figure 7 , the control unit receives the heating mode command, and then controls the first fan, the second fan, the first electronic expansion valve 13, and the second electronic expansion valve 15 to turn on, and controls the electronic two-way valve to turn off. In some cases, the control unit will also control the first electronic expansion valve 13 or the second electronic expansion valve 15 to turn off according to the heating demand or other regulatory requirements; When the control unit receives the defrost mode command due to user operation or the temperature detected by the temperature sensor reaches the defrost threshold, it will enter the defrost mode. In the defrost mode, please refer to Figure 8 , the control unit controls the first fan, the second electronic expansion valve 15, and the electromagnetic two-way valve 14 to turn on, and controls the second fan and the first electronic expansion valve 13 to turn off.
[0048] On the other hand, an embodiment of the present invention provides a heat pump air conditioner, including the variable flow path fins described in any one of the above.
[0049] The beneficial effects of this application are as follows:
[0050] 1. By setting the first electronic expansion valve 13, the problem of cross-flow that occurs in the traditional one-way valve 4 in the refrigeration and defrost modes is avoided, the difficulty of fin defrosting is reduced, and the frost layer on the first fin 1 can be removed first during defrosting, and then the frost layer on the second fin 2 can be removed, solving the defrosting problem of the variable flow path fins.
[0051] 2. Setting the first fin 1 serves as a subcooling flow path, and fewer subcooling flow paths are more suitable for low-temperature working conditions.
[0052] 3. By setting the first fan, turning on the first fan alone during defrosting can effectively avoid high pressure caused by too long flow path during defrosting.
[0053] 4. Set a second blower. Instead of the blower conventionally arranged as a whole covering the first fin 1 and the second fin 2, the first blower and the second blower are used to save costs.
[0054] 5. Set a second electronic expansion valve 15. In the heating mode, the number of heat exchange flow paths involved can be adjusted to increase the adjustability of the variable flow path fins and make the air conditioner more energy-efficient.
[0055] 6. Set a temperature sensor on the lower fins, so that the system can judge whether to enter and exit the defrosting mode according to the temperature detected by the temperature sensor, and increase the reliability of defrosting.
[0056] 7. The control unit can open the first electronic expansion valve 13, adjust the opening degree of the first electronic expansion valve 13, close the first electronic expansion valve 13, and open and close the electromagnetic two-way valve 14, which is convenient for controlling each valve.
[0057] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and deformations.
Claims
1. A variable flow path fin, characterized in that: The invention comprises a first fin, a second fin, a first gas collecting pipe, a one-way valve, a second gas collecting pipe, a gas collecting main pipe, a first distributor, a second distributor, a first liquid distributing pipe, a second liquid distributing pipe, a liquid distributing main pipe, a third liquid distributing pipe, a first electronic expansion valve and an electromagnetic two-way valve; the first fin is located above the second fin, the number of flow paths of the first fin is less than the number of flow paths of the second fin, the side wall of the first gas collecting pipe is connected to the interface at one end of the first fin, one end of the first gas collecting pipe is closed, the other end of the first gas collecting pipe is connected to the input end of the one-way valve, the output end of the one-way valve is connected to one end of the second gas collecting pipe, the side wall of the second gas collecting pipe is connected to the interface at one end of the second fin, and the second The other end of the collecting pipe is connected to one end of the collecting main pipe; one end of the first distributor is connected to the interface at the other end of the first fin, the second distributor is connected to the interface at the other end of the second fin, one end of the first liquid distributor is connected to the other end of the first distributor, one end of the second liquid distributor is connected to the other end of the second distributor, the other end of the first liquid distributor and the other end of the second liquid distributor are both connected to one end of the liquid distributor main pipe, one end of the third liquid distributor is connected to the other end of the second distributor, the other end of the third liquid distributor is connected to the first collecting pipe, the first electronic expansion valve is located on the second liquid distributor, and the electromagnetic two-way valve is located on the third liquid distributor.
2. The variable flow path fin according to claim 1, characterized in that: The number of flow paths of the first fin: the number of flow paths of the second fin = (2 to 3): (5 to 8).
3. The variable flow path fin according to claim 2, characterized in that: The number of flow paths of the first fin: the number of flow paths of the second fin=2:
5.
4. The variable flow path fin according to claim 1, characterized in that: It also includes a first fan, wherein the first fan cover is fixed on the side of the first fin, and the output end of the first fan is arranged toward the side of the first fin.
5. The variable flow path fin according to claim 4, characterized in that: It also includes a second fan, wherein the second fan cover is fixed on the side of the second fin, and the output end of the second fan is arranged toward the side of the second fin.
6. The variable flow path fin according to claim 1, characterized in that: It also includes a second electronic expansion valve, which is located on the first liquid dispensing pipe.
7. The variable flow path fin according to claim 1, characterized in that: A temperature sensor is also included, and the temperature sensor is fixed to the lower fin.
8. The variable flow path fin according to claim 6, characterized in that: The inner diameter of the connecting pipe of the first electronic expansion valve is greater than the inner diameter of the connecting pipe of the second electronic expansion valve.
9. The variable flow path fin according to claim 1, characterized in that: It also includes a control unit, which is electrically connected to the first electronic expansion valve and the electromagnetic two-way valve.
10. A heat pump air conditioner, characterized in that: It comprises the variable flow path fin described in any one of claims 1 to 9.