A rainwater utilization device for reducing the exhaust temperature of refrigerant

Abstract

The present invention discloses a rainwater utilization device for reducing the exhaust temperature of refrigerant, which relates to the technical field of refrigeration equipment. The present invention uses a rainwater collection box to collect the rainwater flowing down from the outer wall of the wall, immerses the serpentine heat exchanger pipeline through which the refrigerant flows in it for heat exchange, and uses a temperature sensor to monitor the outlet temperature of the serpentine heat exchanger in real time. 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 the 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, and stable operation, providing reliable technical support for the safe and efficient application of R32 refrigerant.

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 promotion 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 thermally decompose and carbonize, reducing the lubrication 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, thus 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, there are obvious limitations. Especially when the lubricating oil carbonizes, 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:

[0007] 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;

[0008] 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;

[0009] 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 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;

[0010] A return bend is connected to a return air pipe at the bottom, and the return air pipe is communicated with the suction port of a household air conditioner compressor. Moreover, a return oil solenoid valve is connected in series in the return air pipe, and both the return oil solenoid valve and the liquid level sensor are electrically connected to a control circuit;

[0011] It further includes a temperature sensor which is arranged corresponding to the outlet of the tubular body and is used for detecting the exhaust temperature of the serpentine heat exchanger in real time;

[0012] A drain pipe is connected to the bottom of the rainwater collection box body, and 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.

[0013] In the above solution, the hydrophobic layer can prevent rainwater from invading the wall and at the same time facilitate guiding the 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.

[0014] 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.

[0015] In a further technical solution, the tubular body has a plurality of continuous S-shaped bending structures.

[0016] In a further technical solution, the return bend is U-shaped, and the return air pipe is connected to the bottommost part of the U-shaped return bend.

[0017] In a further technical solution, a flap for opening or closing the box body is arranged at the opening at the upper part of the rainwater collection box body, and the flap is driven by a driving device to perform opening or closing actions.

[0018] 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.

[0019] 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.

[0020] 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 to close through the driving device, so as to reduce the evaporation of rainwater in the box body.

[0021] In a further technical solution, 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 of the wall, so as to reduce false detection and ensure the accuracy of the actions performed by the flap.

[0022] In a further technical solution, a water receiving runner for water distribution is provided at the upper opening of the rainwater collection box body. There are a plurality of the water receiving runners, and the rotating shafts of the water receiving runners are all parallel to the same horizontal direction;

[0023] 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. The blades are 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-rotationally, so that the rainwater flows into the box body orderly and evenly, so as to ensure that the tubular body of the serpentine heat exchanger can be evenly wetted by the rainwater until it is submerged by the rainwater, thereby ensuring the heat exchange effect.

[0024] In a further technical solution, several water dispersing plates for increasing the heat exchange area are also provided 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, and the water dispersing plates are 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, and the heat exchange efficiency can be further improved; on the other hand, when the rainwater on the outer wall of the wall flows into the box body, it can uniformly enter the space formed between two adjacent water dispersing plates through the arrangement of the water dispersing plates, so as to ensure that the tubular body of the serpentine heat exchanger can be evenly wetted by the rainwater until it is submerged by the rainwater, thereby ensuring the heat exchange effect.

[0025] In a further technical solution, a pipe through-hole is provided on the wall. Among them, the gap between the pipe and the hole wall of the pipe through-hole forms a sealing structure by air-conditioning mud.

[0026] 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.

[0027] Regarding the "comprising", "including", "having", etc. used in this article, they are all open-ended terms, that is, they are meant to include but not limited to.

[0028] For the terms used in this text, unless otherwise specified, they generally have their ordinary meanings in the field where each term is used, in the context of this case, and in the specific context. Certain 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.

[0029] The working principle and advantages of the present invention are as follows:

[0030] The present invention discloses a rainwater utilization device for reducing the exhaust temperature of the refrigerant. The rainwater collecting box is used to collect the rainwater flowing down the outer wall of the wall, and the serpentine heat exchanger pipeline through which the refrigerant flows is immersed therein for heat exchange. The outlet temperature of the serpentine heat exchanger is monitored 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 the intelligent oil return is realized in cooperation with the liquid level sensor. This solution not only effectively reduces the exhaust temperature through the natural cooling method, avoids the problem of high-temperature carbonization of the 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.

[0031] The present invention cleverly combines natural cooling and intelligent control technologies, which not only solves the problem of high energy consumption of traditional forced cooling methods, but also overcomes the defect of efficiency attenuation 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

[0032] Appendix Figure 1 is a schematic diagram of the solution of the embodiment of the present invention;

[0033] Appendix Figure 2 is a side view of the water-dispersing sheet of the embodiment of the present invention.

[0034] In the above drawings: 1. Rainwater collecting 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 sheet; 16. Pipe wall-piercing hole. Detailed Description of the Preferred Embodiment

[0035] The present invention will be further described below in conjunction with the drawings and embodiments:

[0036] Embodiment: The present case will be clearly described below with reference to the drawings and detailed descriptions. After understanding the embodiments of the present case, any person skilled in the art can make changes and modifications to the technology taught by the present case without departing from the spirit and scope of the present case.

[0037] The terms used in this article are only for describing specific embodiments and are not intended to limit the present case. Singular forms such as "a", "this", "this", "the present", and "the" also include plural forms as used in this article.

[0038] See the attached Figure 1 , 2 As shown, a rainwater utilization device for reducing the exhaust temperature of a refrigerant includes a rainwater collection box 1, which is arranged below the outer wall 13 of the corresponding wall. A hydrophobic layer is provided on the surface of the outer wall 13.

[0039] A serpentine heat exchanger 2 is provided in the rainwater collection box 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 1.

[0040] 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 tube 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 tube 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. Moreover, an oil return solenoid valve 8 is connected in series in the oil return pipe 7, and both the oil return solenoid valve 8 and the level sensor 6 are electrically connected to a control circuit.

[0041] 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.

[0042] 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 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.

[0043] When the exhaust temperature is less than or equal to 80°C, the temperature sensor 9 senses the exhaust temperature at this time and feeds back the information to the control circuit. The control circuit opens the drain solenoid valve 11, and discharges at least part of the rainwater in the rainwater collection box 1 through the drain pipeline 10, thereby reducing the heat exchange effect of the serpentine heat exchanger 2 and realizing the control of the exhaust temperature.

[0044] Wherein, the inlet of the tubular body 3 extends out of the rainwater collection box 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 1 and is connected to the refrigerant inlet pipe of the condenser.

[0045] Preferably, the tubular body 3 has a plurality of continuous S-shaped bending structures. The oil return bend 4 is U-shaped, and the return air pipe 7 is connected to the bottommost part of the U-shaped oil return bend 4.

[0046] Preferably, a flap 12 for opening or closing the box is provided at the upper opening of the rainwater collection box 1, and the flap 12 is driven by a driving device (not shown in the figure) to perform opening or closing actions.

[0047] 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.

[0048] If the photosensitive sensor detects that the current light is lower than a first set value (light 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 cloudy and 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.

[0049] 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 12 to close through the driving device to reduce the evaporation of rainwater in the box.

[0050] Preferably, the number of the sensor assemblies is greater than or equal to two, and they are arranged at different positions outside the box or on the outer wall 13 of the wall, so as to reduce the detection error rate and ensure the accuracy of the action performed by the flap 12.

[0051] 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 1. There are a plurality of the water receiving runners 14, and the rotating shafts of the water receiving runners 14 are all parallel to the same horizontal direction.

[0052] Each water receiving runner 14 includes several blades whose lengths correspond to the axial direction of the rotating shaft and whose widths are perpendicular to the axial direction of the rotating shaft. Each of the blades is evenly distributed at equal angles in the circumferential direction around the rotating shaft. 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.

[0053] Preferably, several water dispersing plates 15 are further provided in the rainwater collection box body 1. 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. Each of the water dispersing plates 15 is arranged at intervals and in parallel in the horizontal direction.

[0054] Among them, a pipe through-wall hole 16 is opened on the wall. Among them, the gap between the pipe and the hole wall is sealed with air-conditioning mud to ensure the sealing performance.

[0055] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used 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 a refrigerant, characterized in that: It includes a rainwater collection box body, which is arranged corresponding to the lower part of the outer wall of the wall. A hydrophobic layer is provided on the surface of the outer wall of the wall. A serpentine heat exchanger is provided 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. A return oil bend is provided at the bottom of the tubular body, and the return oil bend is formed by bending the lowest tube of the tubular body downward. Among them, a refrigeration oil level sensor is provided corresponding to the return oil bend, and the detection part of the level sensor is located in the elbow of the return oil bend for real-time detection of the oil level of the refrigeration oil in the return oil bend. A return air pipe is connected to the bottom of the return oil bend, and the return air pipe is communicated with the suction port of the household air conditioner compressor. And a return oil solenoid valve is connected in series in the return air pipe. Both the return oil solenoid valve and the level sensor are electrically connected to a control circuit. It also includes a temperature sensor, which is arranged corresponding to the outlet of the tubular body for real-time detection of the exhaust temperature of the serpentine heat exchanger. A drain pipe is connected to the bottom of the rainwater collection box body, and 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. At the opening at the upper part of the rainwater collection box body, a water receiving runner for water distribution is provided, and several water dispersing plates are arranged at intervals on the tubular body.

2. The rainwater utilization device for reducing the exhaust temperature of the refrigerant according to claim 1, characterized in that: 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.

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

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

6. The rainwater utilization device for reducing the exhaust temperature of the refrigerant according to claim 5, wherein: It also 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. 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. 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.

7. The rainwater utilization device for reducing the exhaust temperature of the refrigerant according to claim 6, characterized in that: 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 of the wall.

8. The rainwater utilization device for reducing the exhaust temperature of the refrigerant according to claim 1, characterized in that: A plurality of water receiving runners are provided, and the rotating shafts of each water receiving runner are all parallel to the same horizontal direction; each water receiving runner includes several blades with lengths corresponding to the direction of the rotating shaft and widths perpendicular to the direction of the rotating shaft, and each blade is evenly distributed at equal angles in the circumferential direction around the rotating shaft.

9. The rainwater utilization device for reducing the exhaust temperature of the refrigerant according to claim 1, wherein: The water dispersing plates are vertically fixed on the tubular body, and their heights correspond to the height of the tubular body, and each water dispersing plate is arranged at intervals and parallel in the horizontal direction.

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

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