Air source heat pump unit

Abstract

The utility model relates to the technical field of heat pumps, and provides an air source heat pump unit which comprises a shell tube radiator and two temperature control mechanisms. In the heating process, the temperature control mechanism introduces a gaseous refrigerant into the heat exchange assembly through the output end and the first pipe opening, heat exchange between the gaseous refrigerant and liquid in the heat dissipation pipe is facilitated, and the liquid in the heat dissipation pipe is heated; in the refrigeration process, the temperature control mechanism introduces a liquid refrigerant into the heat exchange assembly through the output end and the first pipe opening so as to cool liquid in the heat dissipation pipe. Due to the fact that in the structural design of the shell and tube radiator, the heat exchange assemblies are arranged at the two ends of the radiating tube in the axis direction of the radiating tube respectively, the two temperature control mechanisms can be communicated with the two ends of the radiating tube respectively, the temperature control mechanisms are distributed at the two ends of the radiating tube, it is guaranteed that the structural distribution of a unit is more uniform and reasonable, and the space utilization rate in the unit is increased; therefore, the use performance of the air source heat pump unit is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pumps, and particularly relates to an air source heat pump unit. Background Art

[0002] A heat pump is a highly energy-efficient device that makes full use of low-grade heat energy and can drive heat to transfer from a low-temperature object to a high-temperature object. A heat pump generally includes a compressor, a shell-and-tube radiator, a parallel connection mode of a fin heat exchanger, an expansion valve, etc. During the heating process, the compressor sucks in a low-temperature and low-pressure gaseous refrigerant, compresses it into a high-temperature and high-pressure gaseous refrigerant. The gaseous refrigerant releases heat to water in the shell-and-tube heat exchanger and then liquefies. After throttling through an electronic expansion valve, it becomes a low-temperature and low-pressure liquid refrigerant, absorbs the heat of the flowing air in the finned-tube heat exchanger and vaporizes, becomes a low-temperature gaseous refrigerant, and is sucked into the compressor again for circulation.

[0003] During the refrigeration process, the compressor sucks in a low-temperature and low-pressure gaseous refrigerant, compresses it into a high-temperature and high-pressure gaseous refrigerant. The gaseous refrigerant releases heat to the flowing air in the finned-tube heat exchanger and liquefies. After throttling through an electronic expansion valve, it becomes a low-temperature and low-pressure liquid refrigerant, absorbs the heat of water in the shell-and-tube radiator and vaporizes, becomes a low-temperature gaseous refrigerant, and is sucked into the compressor again for circulation. However, due to the structural design defects of the traditional shell-and-tube radiator, the structural distribution of the unit becomes complex and bloated, resulting in crowded space in the unit and affecting the use performance of the air source heat pump unit. Summary of the Utility Model

[0004] Based on the above background, the purpose of the utility model is to provide an air source heat pump unit.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An air source heat pump unit includes: a shell-and-tube radiator, including two heat exchange components, a heat dissipation pipe, and a first pipe fitting and a second pipe fitting that are spaced and communicated with the heat dissipation pipe. The two heat exchange components are respectively inserted at both ends of the heat dissipation pipe along the direction of its own axis. A part of each heat exchange component extends into the heat dissipation pipe, and each heat exchange component has a first pipe orifice and a second pipe orifice outside the heat dissipation pipe; two temperature control mechanisms are respectively communicated with the corresponding heat exchange components, and each temperature control mechanism has an output end and an input end. The output end is communicated with the first pipe orifice, and the input end is communicated with the second pipe orifice, and is used to output gaseous or liquid refrigerant to the heat exchange component.

[0007] Furthermore, each of the heat exchange components includes a first connecting pipe, a second connecting pipe, and a zigzag elbow pipe. The two zigzag elbow pipes are both located inside the heat dissipation pipe and are respectively fixed at both ends of the heat dissipation pipe along the direction of its own axis. The first connecting pipe and the second connecting pipe are respectively communicated with both ends of the zigzag elbow pipe. One end of the first connecting pipe has the first pipe orifice, and one end of the second connecting pipe has the second pipe orifice.

[0008] Furthermore, the first pipe fitting includes a first pipe section and a first elbow section. The first pipe section is communicated with the heat dissipation pipe through the first elbow section. The axis of the first pipe section is perpendicular to the axis of the heat dissipation pipe, and the first elbow section is bent.

[0009] Furthermore, the second pipe fitting includes a second pipe section and a second elbow section. The second pipe section is communicated with the heat dissipation pipe through the second elbow section. The axis of the second pipe section is perpendicular to the axis of the heat dissipation pipe, and the second elbow section is bent.

[0010] Furthermore, it further includes two temperature sensors which are respectively arranged on the first pipe fitting and the second pipe fitting for detecting the temperature of the refrigerant.

[0011] Furthermore, each temperature control mechanism includes a compressor, a plate heat exchanger, an expansion valve, and a four-way valve which are communicated with each other. The four-way valve is used to communicatively connect the compressor to the plate heat exchanger and the heat exchange component switchably. The expansion valve is used to reduce the pressure of the liquid refrigerant.

[0012] Furthermore, the shell-and-tube radiator includes a first flow deflector and a second flow deflector which are respectively arranged on two opposite inner walls of the heat dissipation pipe.

[0013] Furthermore, both the first flow deflector and the second flow deflector are multiple. All the first flow deflectors and all the second flow deflectors are spaced apart along the direction of the axis of the heat dissipation pipe, and the first flow deflectors and the second flow deflectors are staggeredly distributed.

[0014] The utility model has the following beneficial effects:

[0015] (1) During the heating process, the temperature control mechanism passes through the output end and the first pipe orifice to introduce gaseous refrigerant into the heat exchange assembly, facilitating the heat exchange between the gaseous refrigerant and the liquid in the heat dissipation pipe, and heating the liquid in the heat dissipation pipe; during the cooling process, the temperature control mechanism passes through the output end and the first pipe orifice to introduce liquid refrigerant into the heat exchange assembly to cool the liquid in the heat dissipation pipe. Due to the structural design of the shell-and-tube radiator, heat exchange assemblies are respectively arranged at both ends of the heat dissipation pipe along the direction of its own axis. Therefore, the two temperature control mechanisms can be respectively connected to both ends of the heat dissipation pipe, enabling the temperature control mechanisms to be distributed at both ends of the heat dissipation pipe, ensuring a more uniform and reasonable structural distribution of the unit, improving the space utilization rate within the unit, and thus guaranteeing the performance of the air source heat pump unit.

[0016] (2) Each heat exchange assembly is designed as a first connecting pipe, a second connecting pipe, and a zigzag pipe, such that the refrigerant in the first connecting pipe enters the zigzag pipe and flows into the second connecting pipe from the zigzag pipe, and then is input into the temperature control mechanism from the second connecting pipe. Since the zigzag pipe is located in the heat dissipation pipe, the heat exchange area between the refrigerant and the air in the heat dissipation pipe can be increased, improving the heat exchange efficiency.

[0017] (3) The axis of the first pipe section is perpendicular to the axis of the heat dissipation pipe, such that the air in the first pipe section flows into the heat dissipation pipe in a direction perpendicular to the axis of the heat dissipation pipe, preventing the air from directly flowing into the second pipe fitting along the axis direction of the heat dissipation pipe, prolonging the flow time, and improving the heat exchange efficiency. At the same time, due to the bent setting of the first elbow section, the air entering the heat dissipation pipe is smoother, improving the stability of heat exchange.

[0018] (4) First flow deflectors and second flow deflectors are arranged on the inner wall of the heat dissipation pipe. In this way, when the air flows in the heat dissipation pipe, under the obstruction of the first flow deflector and the second flow deflector respectively, the air is in a turbulent state, prolonging the flow time, strengthening the heat exchange between the air and the refrigerant, and improving the heat exchange efficiency. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a perspective view of the structure of the air source heat pump unit in one embodiment;

[0021] Figure 2 It is another perspective view of the structure of the air source heat pump unit in one embodiment;

[0022] Figure 3 Schematic structural diagram of the shell-and-tube radiator described in one embodiment;

[0023] Figure 4 Simplified schematic structural diagram of the shell-and-tube radiator described in one embodiment;

[0024] Figure 5 Simplified schematic structural diagram of the shell-and-tube radiator described in another embodiment.

[0025] Explanation of the reference numerals in the drawings:

[0026] 100, air source heat pump unit; 10, shell-and-tube radiator; 11, heat exchange component; 111, first connecting pipe; 112, second connecting pipe; 113, zigzag elbow; 114, first pipe orifice; 115, second pipe orifice; 12, heat dissipation pipe; 13, first pipe fitting; 131, first pipe section; 132, first elbow section; 14, second pipe fitting; 141, second pipe section; 142, second elbow section; 15, first flow deflector; 16, second flow deflector; 20, temperature control mechanism; 21, compressor; 22, plate heat exchanger; 23, expansion valve; 24, four-way valve; 30, temperature sensor.

[0027] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In one embodiment, please refer to Figures 1 to 5 , the present application provides an air source heat pump unit 100, including: a shell-and-tube radiator 10, including two heat exchange components 11, a heat dissipation tube 12, and a first pipe fitting 13 and a second pipe fitting 14 that are spaced and communicated with the heat dissipation tube 12. The two heat exchange components 11 are respectively inserted at both ends of the heat dissipation tube 12 along the direction of its own axis. A part of each heat exchange component 11 extends into the heat dissipation tube 12, and both heat exchange components 11 have a first pipe orifice 114 and a second pipe orifice 115 outside the heat dissipation tube 12; two temperature control mechanisms 20, respectively communicated with the corresponding heat exchange components 11, and each temperature control mechanism 20 has an output end and an input end. The output end is communicated with the first pipe orifice 114, and the input end is communicated with the second pipe orifice 115, for outputting gaseous or liquid refrigerant into the heat exchange component 11.

[0032] For the above-mentioned air source heat pump unit 100, during the heating process, the temperature control mechanism 20 passes through the output end and the first pipe orifice 114 to introduce gaseous refrigerant into the heat exchange component 11, facilitating the heat exchange between the gaseous refrigerant and the liquid in the heat dissipation tube 12 and heating the liquid in the heat dissipation tube 12; during the refrigeration process, the temperature control mechanism 20 passes through the output end and the first pipe orifice 114 to introduce liquid refrigerant into the heat exchange component 11 to cool the liquid in the heat dissipation tube 12. Due to the structural design of the shell-and-tube radiator 10, the heat exchange components 11 are respectively arranged at both ends of the heat dissipation tube 12 along the direction of its own axis. Therefore, the two temperature control mechanisms 20 can be respectively communicated with both ends of the heat dissipation tube 12, so that the temperature control mechanisms 20 are distributed at both ends of the heat dissipation tube 12, ensuring that the structural distribution of the unit is more uniform and reasonable, improving the space utilization rate inside the unit, and thus guaranteeing the use performance of the air source heat pump unit 100.

[0033] It should be explained that the temperature control mechanism 20 refers to a device that can convert the refrigerant from a liquid state to a gaseous state. Of course, after the refrigerant is converted into a gaseous refrigerant, the gaseous refrigerant can also be converted back into a liquid refrigerant. For example: when the refrigerant becomes a gaseous refrigerant under the action of the compressor 21, it can then enter the plate heat exchanger for heat dissipation and cooling and become a liquid refrigerant.

[0034] Furthermore, please refer to Figure 3 AndFigure 4 Each heat exchange component 11 includes a first connecting pipe 111, a second connecting pipe 112 and a zigzag pipe 113. Both of the two zigzag pipes 113 are located inside the heat dissipation pipe 12 and are respectively fixed at both ends of the heat dissipation pipe 12 along the direction of its own axis. The first connecting pipe 111 and the second connecting pipe 112 are respectively communicated with both ends of the zigzag pipe 113. One end of the first connecting pipe 111 has a first pipe orifice 114, and one end of the second connecting pipe 112 has a second pipe orifice 115. It can be seen that by designing each heat exchange component 11 into the first connecting pipe 111, the second connecting pipe 112 and the zigzag pipe 113, the refrigerant in the first connecting pipe 111 enters the zigzag pipe 113, flows from the zigzag pipe 113 into the second connecting pipe 112, and then is input into the temperature control mechanism 20 by the second connecting pipe 112. Since the zigzag pipe 113 is located in the heat dissipation pipe 12, the heat exchange area between the refrigerant and the air in the heat dissipation pipe 12 can be increased, and the heat exchange efficiency can be improved.

[0035] It should be explained that the zigzag pipe 113 refers to a zigzag pipe presenting an approximate U shape, with both ends respectively fixed at the same end of the heat dissipation pipe 12, and the part located in the heat dissipation pipe 12 being a wavy zigzag structure, which can extend the flow path and increase the heat exchange time.

[0036] In one embodiment, please refer to Figure 3 The first pipe fitting 13 includes a first pipe section 131 and a first bent pipe section 132. The first pipe section 131 is communicated with the heat dissipation pipe 12 through the first bent pipe section 132. The axis of the first pipe section 131 is perpendicular to the axis of the heat dissipation pipe 12, and the first bent pipe section 132 is bent. It can be seen that the axis of the first pipe section 131 being perpendicular to the axis of the heat dissipation pipe 12 enables the air in the first pipe section 131 to flow into the heat dissipation pipe 12 in a direction perpendicular to the axis of the heat dissipation pipe 12, avoiding the air flowing directly into the second pipe fitting 14 along the axis direction of the heat dissipation pipe 12, extending the flow time, and improving the heat exchange efficiency. At the same time, since the first bent pipe section 132 is bent, the air entering the heat dissipation pipe 12 is smoother, improving the stability of heat exchange.

[0037] In one embodiment, please refer to Figure 3, the second pipe fitting 14 includes a second pipe section 141 and a second elbow section 142. The second pipe section 141 communicates with the heat dissipation pipe 12 through the second elbow section 142. The axis of the second pipe section 141 is perpendicular to the axis of the heat dissipation pipe 12, and the second elbow section 142 is bent. It can be seen that the axis of the second pipe section 141 is perpendicular to the axis of the heat dissipation pipe 12, so that the air in the second pipe section 141 flows into the heat dissipation pipe 12 in a direction perpendicular to the axis of the heat dissipation pipe 12, avoiding the air flowing directly into the second pipe fitting 14 along the axis direction of the heat dissipation pipe 12, prolonging the flow time, and improving the heat exchange efficiency. At the same time, since the second elbow section 142 is bent, the air entering the heat dissipation pipe 12 is smoother, improving the stability of heat exchange.

[0038] It should be noted that the first pipe section 131 and the first elbow section 132 can be an integral structure; at the same time, the second pipe section 141 and the second elbow section 142 can be an integral structure.

[0039] In one embodiment, please refer to Figure 4 , further comprising two temperature sensors 30, which are respectively arranged on the first pipe fitting 13 and the second pipe fitting 14 for detecting the temperature of the refrigerant. It can be seen that through the temperature sensors 30, the temperature of the air can be monitored in real time to ensure accurate and stable control of the air temperature.

[0040] In one embodiment, please refer to Figure 2 , each temperature control mechanism 20 includes a compressor 21, a plate heat exchanger 22, an expansion valve 23 and a four-way valve 24 that are connected to each other. The four-way valve 24 is used to switchably connect the compressor 21 to the plate heat exchanger 22 and the heat exchange assembly 11, and the expansion valve 23 is used to reduce the pressure of the liquid refrigerant.

[0041] In one embodiment, please refer to Figure 5 , the shell and tube radiator 10 includes a first spoiler 15 and a second spoiler 16, and the first spoiler 15 and the second spoiler 16 are respectively arranged on opposite inner walls of the heat dissipation pipe 12. It can be seen that the first spoiler 15 and the second spoiler 16 are arranged on the inner wall of the heat dissipation pipe 12. In this way, when the air flows in the heat dissipation pipe 12, the air is in a turbulent state under the obstruction of the first spoiler 15 and the second spoiler 16 respectively, prolonging the flow time, strengthening the heat exchange between the air and the refrigerant, and improving the heat exchange efficiency.

[0042] Further, please refer to Figure 5 , both the first spoiler 15 and the second spoiler 16 are multiple, all the first spoilers 15 and all the second spoilers 16 are spaced apart along the axis direction of the heat dissipation pipe 12, and the first spoiler 15 and the second spoiler 16 are staggeredly distributed. It can be seen that through the staggered distribution, it is easier to form a spoiler for the flow of air and strengthen the heat exchange efficiency.

[0043] Certainly, the above description is not a limitation on the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the substantial scope of the present utility model shall also fall within the protection scope of the present utility model.

Claims

1. An air source heat pump unit, characterized in that: include: A shell and tube radiator (10) comprises two heat exchange components (11), a heat dissipation pipe (12), and a first pipe fitting (13) and a second pipe fitting (14) which are connected to the heat dissipation pipe (12) at intervals, wherein the two heat exchange components (11) are respectively inserted at both ends of the heat dissipation pipe (12) along the direction of its own axis, a portion of each heat exchange component (11) extends into the heat dissipation pipe (12), and each heat exchange component (11) is located outside the heat dissipation pipe (12) and has a first pipe opening (114) and a second pipe opening (115); The two temperature control mechanisms (20) are respectively connected to the corresponding heat exchange components (11), and each of the temperature control mechanisms (20) has an output end and an input end, the output end is connected to the first pipe port (114), and the input end is connected to the second pipe port (115), and is used to output gaseous or liquid refrigerant to the heat exchange component (11).

2. The air source heat pump unit according to claim 1, characterized in that: Each of the heat exchange components (11) comprises a first connecting tube (111), a second connecting tube (112) and a zigzag tube (113); the two zigzag tubes (113) are both located in the heat dissipation tube (12) and are respectively fixed to the two ends of the heat dissipation tube (12) along its own axis; the first connecting tube (111) and the second connecting tube (112) are respectively connected to the two ends of the zigzag tube (113); one end of the first connecting tube (111) has the first tube opening (114), and one end of the second connecting tube (112) has the second tube opening (115).

3. The air source heat pump unit according to claim 1, characterized in that: The first pipe member (13) comprises a first pipe section (131) and a first bent pipe section (132); the first pipe section (131) is connected to the heat dissipation pipe (12) via the first bent pipe section (132); the axis of the first pipe section (131) is perpendicular to the axis of the heat dissipation pipe (12); and the first bent pipe section (132) is arranged in a bent manner.

4. The air source heat pump unit according to claim 1, characterized in that: The second pipe member (14) comprises a second pipe section (141) and a second curved pipe section (142); the second pipe section (141) is connected to the heat dissipation pipe (12) via the second curved pipe section (142); the axis of the second pipe section (141) is perpendicular to the axis of the heat dissipation pipe (12); and the second curved pipe section (142) is arranged in a curved manner.

5. The air source heat pump unit according to claim 1, characterized in that: It also includes two temperature sensors (30), which are respectively arranged on the first pipe (13) and the second pipe (14) and are used to detect the temperature of the refrigerant.

6. An air source heat pump unit according to any one of claims 1 to 5, characterized in that: Each of the temperature control mechanisms (20) includes a compressor (21), a plate heat exchanger (22), an expansion valve (23) and a four-way valve (24) which are interconnected. The four-way valve (24) is used to switchably connect the compressor (21) to the plate heat exchanger (22) and the heat exchange component (11), and the expansion valve (23) is used to lower the pressure of the liquid refrigerant.

7. An air source heat pump unit according to any one of claims 1 to 5, characterized in that: The shell-and-tube radiator (10) comprises a first spoiler (15) and a second spoiler (16); the first spoiler (15) and the second spoiler (16) are respectively arranged on two opposite inner walls of the radiating tube (12).

8. The air source heat pump unit according to claim 7, characterized in that: There are a plurality of the first spoiler plates (15) and a plurality of the second spoiler plates (16), all of the first spoiler plates (15) and all of the second spoiler plates (16) are distributed at intervals along the axis of the heat dissipation pipe (12), and the first spoiler plates (15) and the second spoiler plates (16) are distributed in a staggered manner.

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