Rainwater utilization device for reducing refrigerant exhaust temperature

Abstract

The invention discloses a rainwater utilization device for reducing the refrigerant exhaust temperature, and relates to the technical field of refrigeration equipment. Rainwater confluence on the outer wall of the wall body is collected through the rainwater collecting box body, the S-shaped heat exchanger pipeline where refrigerants circulate is immersed in the rainwater collecting box body for heat exchange, the temperature of an outlet of the S-shaped heat exchanger is monitored in real time through the temperature sensor, and when the temperature is lower than a set value, rainwater is automatically drained; the exhaust temperature is accurately controlled by reducing heat exchange; meanwhile, an oil return bend is arranged at the bottom of the heat exchanger, refrigerant oil is accumulated under the gravity effect, and intelligent oil return is achieved in cooperation with a liquid level sensor. According to the scheme, the exhaust temperature is effectively reduced in a natural cooling mode, the problem of high-temperature carbonization of lubricating oil is avoided, the oil return efficiency is remarkably improved, the advantages of being simple in structure, capable of saving energy, environmentally friendly, stable in operation and the like are achieved, and reliable technical support is provided for safe and efficient application of R32 refrigerants.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly relates to a rainwater utilization device for reducing the exhaust temperature of refrigerant. Background Art

[0002] The popularization of the environmental refrigerant R32 faces a key technical challenge - the problem of high exhaust temperature. Although R32 is favored due to its low global warming potential (GWP value is only 675), its physical properties bring new problems: compared with the traditional R410A refrigerant, the saturation pressure of R32 is about 3% higher, and the exhaust temperature is 8 - 15 °C higher. The high exhaust temperature causes the lubricating oil to undergo thermal decomposition and carbonization, reducing the lubricating performance and may also block the pipeline system. At the same time, the continuous high exhaust temperature will also increase the working load of the compressor, thereby shortening the service life of the entire household air conditioner.

[0003] Currently, the improvement solutions in the industry mainly focus on optimizing the compressor structure or installing a forced oil return device (such as an oil separator). Although these measures can reduce the exhaust temperature to a certain extent, they have obvious limitations. Especially when the lubricating oil is carbonized, the oil return efficiency decays, and the existing technology is difficult to fundamentally solve this problem.

[0004] Therefore, developing an integrated solution that can simultaneously achieve efficient heat exchange and cooling of the refrigerant and intelligent oil return has become the key to breaking through the current technical bottleneck. Such a solution needs to take into account the dual requirements of temperature control and oil circuit maintenance to truly promote the wide application of R32 refrigerant in the air conditioning field. Summary of the Invention

[0005] The purpose of the present invention is to provide a rainwater utilization device for reducing the exhaust temperature of refrigerant.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A rainwater utilization device for reducing the exhaust temperature of refrigerant, including a rainwater collection box body, which is arranged below the outer wall of the corresponding wall, and a hydrophobic layer is provided on the surface of the outer wall of the wall; A serpentine heat exchanger is arranged in the rainwater collection box body; the serpentine heat exchanger has a continuously bent tubular body, and the tubular body is located in the rainwater collection box body; An oil return bend is provided at the bottom of the tubular body, and the oil return bend is formed by bending the lowest tube of the tubular body downward; wherein, a refrigeration oil level sensor is provided corresponding to the oil return bend, and the detection part of the level sensor is located in the tube of the oil return bend for real-time detection of the oil level of the refrigeration oil in the oil return bend; The bottom of the oil return bend is connected to an oil return pipe, which is communicated with the suction port of the household air conditioner compressor. And an oil return solenoid valve is connected in series in the oil return pipe. Both the oil return solenoid valve and the liquid level sensor are electrically connected to a control circuit; It further includes a temperature sensor, which is arranged corresponding to the outlet of the tubular body and is used to detect the exhaust temperature of the serpentine heat exchanger in real time; A drain pipe is connected to the bottom of the rainwater collection box body. A drain solenoid valve is connected in series in the drain pipe. Both the drain solenoid valve and the temperature sensor are electrically connected to the control circuit.

[0007] In the above solution, the hydrophobic layer can prevent rainwater from invading the wall, and at the same time is convenient for guiding rainwater to flow downward into the rainwater collection box body. The construction of the hydrophobic layer can select known hydrophobic materials such as silicone-modified hydrophobic coatings and fluorocarbon resin coatings. Since this part is not the invention point of this case and is prior art, it will not be elaborated in this case.

[0008] In the above solution, the inlet of the tubular body extends out of the rainwater collection box body and is connected to the refrigerant exhaust pipe of the compressor; the outlet of the tubular body extends out of the rainwater collection box body and is connected to the refrigerant inlet pipe of the condenser.

[0009] In a further technical solution, the tubular body has a plurality of continuous S-shaped bending structures.

[0010] In a further technical solution, the oil return bend is U-shaped, and the oil return pipe is connected to the bottommost part of the U-shaped oil return bend.

[0011] In a further technical solution, a flap for opening or closing the box body is arranged at the opening above the rainwater collection box body, and the flap is driven by a driving device to perform opening or closing actions.

[0012] In a further technical solution, it further includes a sensor assembly, which is located outdoors and includes a photosensitive sensor and a humidity sensor; the sensor assembly is electrically connected to a control circuit, and the control circuit is electrically connected to the driving device.

[0013] If the photosensitive sensor detects that the current light is lower than a first set value, and the humidity sensor detects that the current ambient humidity is greater than a second set value, the control circuit drives the flap to open through the driving device for receiving rainwater. The first set value corresponds to the light intensity on a cloudy and rainy day, and the second set value corresponds to the ambient humidity on a rainy day.

[0014] If the photosensitive sensor detects that the current light is higher than the first set value, or the humidity sensor detects that the current ambient humidity is less than the second set value, the control circuit drives the flap to close through the driving device to reduce the evaporation of rainwater in the box body.

[0015] Further technical solution: the number of the sensor components is greater than or equal to two, and they are arranged at different positions outside the box body or on the outer wall of the wall, so as to reduce false detection and ensure the accuracy of the flap's execution action.

[0016] Further technical solution: at the upper opening of the rainwater collection box body, there are water receiving runners for water distribution. There are multiple such water receiving runners, and the rotating shafts of each water receiving runner are parallel to the same horizontal direction; Each water receiving runner includes several blades whose lengths correspond to the direction of the rotating shaft and whose widths are perpendicular to the direction of the rotating shaft. Each of the blades is evenly distributed at equal angles around the circumferential direction of the rotating shaft. When the rainwater on the outer wall of the wall flows down, it first passes through each water receiving runner, and the self-weight of the rainwater drives the water receiving runner to rotate self - sufficiently, so as to flow into the box body orderly and evenly, thereby ensuring that the tubular body of the serpentine heat exchanger can be evenly wetted by the rainwater until it is submerged by the rainwater, so as to ensure the heat exchange effect.

[0017] Further technical solution: several water - dispersing plates for increasing the heat exchange area are also arranged in the rainwater collection box body. The water - dispersing plates are vertically positioned on the tubular body, and their heights correspond to the height of the tubular body. Each of the water - dispersing plates is arranged at intervals and in parallel in the horizontal direction. On the one hand, the contact area with the rainwater is increased through the water - dispersing plates, which can further improve the heat exchange efficiency; on the other hand, when the rainwater on the outer wall of the wall flows into the box body, it can evenly enter the space formed between two adjacent water - dispersing plates through the arrangement of each water - dispersing plate, thereby ensuring that the tubular body of the serpentine heat exchanger can be evenly wetted by the rainwater until it is submerged by the rainwater, so as to ensure the heat exchange effect.

[0018] Further technical solution: there is a pipe penetration hole on the wall. Among them, the gap between the pipe and the hole wall of the pipe penetration hole forms a sealing structure by air - conditioner mud.

[0019] Regarding the "connection" or "positioning" used in this article, it can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, and can also refer to two or more components or devices operating or acting on each other.

[0020] Regarding the "including", "comprising", "having", etc. used in this article, they are all open - ended terms, that is, they are meant to include but not be limited to.

[0021] Regarding the terms used in this article, unless otherwise specified, they usually have their ordinary meanings in this field, in the context of this case, and in the special context. Some of the terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this case.

[0022] The working principle and advantages of the present invention are as follows: The present invention discloses a rainwater utilization device for reducing the exhaust temperature of refrigerants. The device collects the rainwater flowing down the outer wall of the wall through a rainwater collection box, immerses the serpentine heat exchanger pipeline through which the refrigerant flows in it for heat exchange, and monitors the outlet temperature of the serpentine heat exchanger in real time through a temperature sensor. When the temperature is lower than the set value, the rainwater is automatically discharged, and the exhaust temperature is accurately controlled by reducing heat exchange. At the same time, an oil return bend is arranged at the bottom of the heat exchanger to accumulate the refrigeration oil by gravity, and intelligent oil return is realized in cooperation with the liquid level sensor. This solution not only effectively reduces the exhaust temperature through natural cooling, avoids the problem of high-temperature carbonization of lubricating oil, but also significantly improves the oil return efficiency, and has the advantages of simple structure, energy conservation and environmental protection, stable operation, etc., providing reliable technical support for the safe and efficient application of R32 refrigerant.

[0023] The present invention cleverly combines natural cooling and intelligent control technologies, not only solves the problem of high energy consumption of traditional forced cooling methods, but also overcomes the efficiency attenuation defect of simple mechanical oil return devices. Through the synergistic effect of rainwater heat exchange and oil return bend design, not only the service life of the compressor is extended, but also the system maintenance cost is reduced, showing good environmental adaptability and economy, and providing a practical technical path for the promotion of environmentally friendly refrigerants. Brief Description of the Drawings

[0024] Appendix Figure 1 is a schematic diagram of the solution of the embodiment of the present invention; Appendix Figure 2 is a side view of the water-dispersing piece of the embodiment of the present invention.

[0025] In the above drawings: 1. Rainwater collection box; 2. Serpentine heat exchanger; 3. Tubular body; 4. Oil return bend; 5. Oil filter; 6. Liquid level sensor; 7. Return air pipe; 8. Oil return solenoid valve; 9. Temperature sensor; 10. Drainage pipeline; 11. Drainage solenoid valve; 12. Flap; 13. Outer wall of the wall; 14. Water receiving runner; 15. Water-dispersing piece; 16. Pipe wall penetration hole. Detailed Embodiments

[0026] The present invention will be further described below in conjunction with the drawings and embodiments: Embodiment: The following will clearly explain this case with diagrams and detailed descriptions. After any person skilled in the art understands the embodiments of this case, they can change and modify it according to the technology taught by this case, and it does not deviate from the spirit and scope of this case.

[0027] The terms used in this article are only for describing specific embodiments and are not intended to limit this case. Singular forms such as "a", "this", "this", "the present", and "the" also include plural forms as used herein.

[0028] Refer to Appendix Figure 1 、2 As shown in the figure, a rainwater utilization device for reducing the exhaust temperature of a refrigerant includes a rainwater collection box body 1, which is arranged below the outer wall 13 of the wall. A hydrophobic layer is provided on the surface of the outer wall 13 of the wall.

[0029] A serpentine heat exchanger 2 is provided in the rainwater collection box body 1; the serpentine heat exchanger 2 has a continuously bent tubular body 3, and the tubular body 3 is located in the rainwater collection box body 1.

[0030] An oil return bend 4 is provided at the bottom of the tubular body 3. The oil return bend 4 is formed by bending the lowermost pipe of the tubular body 3 downward, and an oil filter 5 can be arranged in the oil return bend 4. Among them, a refrigerant oil level sensor 6 is provided corresponding to the oil return bend 4. The detection part of the level sensor 6 is located in the pipe body of the oil return bend 4 and is used to detect the oil level of the refrigerant oil in the oil return bend 4 in real time. The bottom of the oil return bend 4 is connected to an oil return pipe 7, and the oil return pipe 7 is communicated with the suction port of the household air conditioner compressor. And an oil return solenoid valve 8 is connected in series in the oil return pipe 7. Both the oil return solenoid valve 8 and the level sensor 6 are electrically connected to a control circuit.

[0031] When the refrigerant oil in the oil return bend 4 accumulates to a set oil level, at this time the level sensor 6 senses the oil level state and feeds back information to the control circuit. The control circuit opens the oil return solenoid valve 8, and the refrigerant oil is returned to the compressor suction port through the oil return pipe 7.

[0032] It further includes a temperature sensor 9, which is arranged corresponding to the outlet of the tubular body 3 and is used to detect the exhaust temperature of the serpentine heat exchanger 2 in real time. A drain pipe 10 is connected to the bottom of the rainwater collection box body 1, and a drain solenoid valve 11 is connected in series in the drain pipe 10. Both the drain solenoid valve 11 and the temperature sensor 9 are electrically connected to the control circuit.

[0033] When the exhaust temperature is less than or equal to 80 °C, at this time the temperature sensor 9 senses the exhaust temperature and feeds back information to the control circuit. The control circuit opens the drain solenoid valve 11, and at least part of the rainwater in the rainwater collection box body 1 is drained through the drain pipe 10, thereby reducing the heat exchange effect of the serpentine heat exchanger 2 and realizing the control of the exhaust temperature.

[0034] Among them, the inlet of the tubular body 3 extends out of the rainwater collection box body 1 and is connected to the refrigerant exhaust pipe of the compressor; the outlet of the tubular body 3 extends out of the rainwater collection box body 1 and is connected to the refrigerant inlet pipe of the condenser.

[0035] Preferably, the tubular body 3 has a plurality of continuous S-shaped bending structures. The oil return bend 4 is U-shaped, and the oil return pipe 7 is connected to the bottommost part of the U-shaped oil return bend 4.

[0036] Preferably, a flap 12 for opening or closing the box body is provided at the upper opening of the rainwater collection box body 1, and the flap 12 is driven by a driving device (not shown in the figure) to perform opening or closing actions.

[0037] It further includes a sensor assembly (not shown in the figure), which is located outdoors and includes a photosensitive sensor and a humidity sensor; the sensor assembly is electrically connected to the control circuit, and the control circuit is electrically connected to the driving device.

[0038] If the photosensitive sensor detects that the current light intensity is lower than a first set value (light intensity value), and the humidity sensor detects that the current ambient humidity is greater than a second set value (humidity value), the control circuit drives the flap 12 to open through the driving device for receiving rainwater. The first set value corresponds to the light intensity on a rainy day, and the second set value corresponds to the ambient humidity on a rainy day, so as to simulate the light and humidity on a rainy day and serve as a necessary condition for the flap 12 to open.

[0039] If the photosensitive sensor detects that the current light intensity is higher than the first set value, or the humidity sensor detects that the current ambient humidity is lower than the second set value, the control circuit drives the flap 12 to close through the driving device to reduce the evaporation of rainwater in the box body.

[0040] Preferably, the number of the sensor assemblies is greater than or equal to two, and they are arranged at different positions outside the box body or on the outer wall 13 of the wall, so as to reduce the detection error rate and ensure the accuracy of the actions performed by the flap 12.

[0041] Preferably, a water receiving runner 14 (i.e., a water distribution wheel) for water distribution is provided at the upper opening of the rainwater collection box body 1, and a plurality of the water receiving runners 14 are provided, and the rotation axes of the water receiving runners 14 are all parallel to the same horizontal direction.

[0042] Each water receiving runner 14 includes several blades whose lengths correspond to the direction of the rotation axis and widths are perpendicular to the direction of the rotation axis, and the blades are evenly distributed at equal angles in the circumferential direction around the rotation axis. When the rainwater on the outer wall 13 of the wall flows down, it first passes through each water receiving runner 14, and the self-weight of the rainwater drives the water receiving runner 14 to rotate self-rotationally.

[0043] Preferably, several water dispersing plates 15 are further provided in the rainwater collection box body 1, and the water dispersing plates 15 are vertically positioned on the tubular body 3, and their heights correspond to the height of the tubular body 3, and the water dispersing plates 15 are arranged at intervals and in parallel in the horizontal direction.

[0044] Wherein, a pipe through-hole 16 is formed in the wall, and the gap between the pipe and the hole wall is sealed with air-conditioning mud to ensure the sealing performance.

[0045] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rainwater utilization device for reducing the exhaust temperature of refrigerant, characterized in that: It comprises a rainwater collection box, which is arranged below the outer wall of the wall, and a hydrophobic layer is arranged on the surface of the outer wall of the wall; A serpentine heat exchanger is provided in the rainwater collection box; the serpentine heat exchanger has a continuously bent tubular body, and the tubular body is located in the rainwater collection box; An oil return bend is provided at the bottom of the tubular body, and the oil return bend is formed by bending the lowermost tube of the tubular body downward; wherein a refrigerant oil level sensor is provided corresponding to the oil return bend, and the detection part of the level sensor is located in the bent pipe of the oil return bend, and is used to detect the oil level of the refrigerant oil in the oil return bend in real time; The bottom of the oil return bend is connected to a return air pipe, which is in communication with the air intake port of the household air conditioner compressor, and an oil return solenoid valve is serially connected in the return air pipe, and the oil return solenoid valve and the liquid level sensor are both electrically connected to a control circuit; It also includes a temperature sensor, which is arranged corresponding to the outlet of the tubular body and is used to detect the exhaust temperature of the serpentine heat exchanger in real time; A drain pipe is connected to the bottom of the rainwater collection box, a drain solenoid valve is connected in series in the drain pipe, and the drain solenoid valve and the temperature sensor are both electrically connected to the control circuit; A water receiving wheel for distributing water is arranged at the upper opening of the rainwater collection box, and a plurality of water dispersing sheets are arranged at intervals on the tubular body.

2. A rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: The inlet of the tubular body extends out of the rainwater collection box and is connected to the refrigerant exhaust pipe of the compressor; the outlet of the tubular body extends out of the rainwater collection box and is connected to the refrigerant inlet pipe of the condenser.

3. A rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: The tubular body has a plurality of continuous S-shaped bending structures.

4. A rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: The oil return bend is U-shaped, and the air return pipe is connected to the bottom of the U-shaped oil return bend.

5. The rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: A flap for opening or closing the rainwater collection box is provided at the upper opening of the rainwater collection box, and the flap is driven by a driving device to open or close.

6. A rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 5, characterized in that: Also included is a sensor assembly, which is located outdoors and includes a light sensor and a humidity sensor; The sensor assembly is electrically connected to a control circuit, and the control circuit is electrically connected to the drive device; If the photosensor detects that the current light intensity is lower than a first set value, and the humidity sensor detects that the current ambient humidity is greater than a second set value, the control circuit drives the flap to open through the driving device; If the photosensor detects that the current light intensity is higher than the first set value, or if the humidity sensor detects that the current ambient humidity is lower than the second set value, the control circuit drives the flap to close through the driving device.

7. A rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 6, characterized in that: The number of the sensor components is greater than or equal to two, and they are arranged at different positions outside the box or on the outer wall of the wall.

8. The rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: There are multiple water receiving wheels, and the rotating axes of each water receiving wheel are parallel to the same horizontal direction; each water receiving wheel includes a plurality of blades whose length corresponds to the rotating axis direction and whose width is perpendicular to the rotating axis direction, and each blade is evenly distributed at equal angles around the circumferential direction of the rotating axis.

9. The rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: The water-spreading sheets are vertically positioned on the tubular body, and their heights correspond to the heights of the tubular body, and the water-spreading sheets are spaced and arranged in parallel in the horizontal direction.

10. The rainwater utilization device for reducing the refrigerant exhaust temperature according to claim 1, characterized in that: The wall is provided with a pipeline through-wall hole, wherein the gap between the pipeline and the hole wall of the pipeline through-wall hole is sealed by air-conditioning mud.

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