An energy-saving refrigeration device with automatic refrigerant filling

Abstract

The present invention provides an energy-saving refrigeration device with automatic refrigerant filling, which relates to the technical field of refrigerant filling. The energy-saving refrigeration device with automatic refrigerant filling includes a refrigerant storage mechanism, a temporary storage mechanism and an automatic filling mechanism. The refrigerant storage mechanism includes a refrigerant storage tank, and a high-pressure pump is fixedly connected to one end of the refrigerant storage tank. The present invention realizes non-electrified automatic filling through a pure mechanical linkage structure, uses the pressure difference to drive the opening and closing of the sealing mechanism, accurately completes the refrigerant filling, does not require electronic equipment, significantly reduces energy consumption. The temporary storage mechanism is linked with the inflation air wheel through the high-pressure pump, and the refrigerant can be used multiple times for a single refrigerant replenishment, and the pressurization function is realized synchronously, reducing the frequent start of the high-pressure pump and further saving energy. The overall design is compact and efficient, realizes automatic filling and pressure maintenance through the cooperation of pressure difference and machinery, simplifies the complexity of the equipment, and meets the requirements of high efficiency, energy saving and environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerant filling, and specifically relates to an energy-saving refrigeration device for automatic refrigerant filling. Background Art

[0002] Refrigeration equipment refers to a general term for a series of devices and systems that can achieve the refrigeration function. It consumes a certain amount of energy (such as electric energy, heat energy, etc.), and through the refrigeration cycle process, transfers the heat in the object to be cooled to the surrounding environment, thereby reducing its temperature to the required level. Common ones include refrigerators, air conditioners, freezers, refrigerated trucks, cold storages, etc. Refrigeration equipment needs to be filled with refrigerant because the refrigerant plays a core role in the operation of the refrigeration equipment and is the key substance to achieve the refrigeration cycle and refrigeration effect. The essence of refrigeration is the transfer of heat. The refrigerant uses its own properties to continuously change its state in the refrigeration cycle to complete the absorption and release of heat. In the evaporator, the low-temperature and low-pressure liquid refrigerant absorbs the heat of the object to be cooled and vaporizes to achieve the refrigeration purpose. Then, under the action of components such as compressors and condensers, the gaseous refrigerant turns back into a liquid state and continues to cycle.

[0003] During the operation of existing refrigeration equipment, when the refrigerant inside is used up, there are obvious drawbacks in the current methods of detecting the amount of refrigerant and subsequent refrigerant filling operations. Usually, multiple sets of equipment need to be combined and used, and the individual operation of these equipment will consume a large amount of energy such as electric energy. On the one hand, the simultaneous operation of multiple sets of equipment will inevitably increase the overall energy loss, causing a significant increase in the energy consumption of the refrigeration equipment during the refrigerant detection and filling stage; on the other hand, excessive energy consumption not only causes waste of resources but also generates more pollutants such as carbon emissions, which does not conform to the current development concept of environmental protection and energy conservation. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an energy-saving refrigeration device for automatic refrigerant filling, which solves the problems of high energy consumption and lack of environmental protection in the prior art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An energy-saving refrigeration device for automatic refrigerant filling, including a refrigerant storage mechanism, a temporary storage mechanism, and an automatic filling mechanism. The refrigerant storage mechanism includes a refrigerant storage tank, one end of the refrigerant storage tank is fixedly connected to a high-pressure pump, and the output end and the input end of the high-pressure pump are respectively fixedly connected to an output pipe and an input pipe;

[0006] The temporary storage mechanism includes a temporary storage box. At the center of the upper end of the temporary storage box, a power chamber is fixedly arranged. At the center of one inner wall of the power chamber, a first rotating rod is rotatably arranged. The other end of the first rotating rod penetrates through the power chamber and extends to the outside of the power chamber, and a large gear is fixedly arranged. A rotating water wheel is fixedly sleeved on the rod body of the first rotating rod located inside the power chamber. At the upper end of one outer wall of the temporary storage box, a pressurizing elbow pipe is penetrated. At the turning point of the pressurizing elbow pipe, a second rotating rod is rotatably sleeved. At both ends of the second rotating rod, a small gear and an air inflating wheel are respectively fixedly arranged. One-way valves are fixedly arranged at the lower end of the pressurizing elbow pipe and near the temporary storage box. An injection hole is formed between the temporary storage box and the power chamber.

[0007] Preferably, the automatic filling mechanism includes an injection pipe. At the upper end of the rear side of the injection pipe, a communicating pipe is fixedly connected. An infrared control valve is fixedly arranged on the pipe body of the communicating pipe near the injection pipe.

[0008] Preferably, a complete sealing piston is movably sleeved at the upper end inside the injection pipe. The upper end of the complete sealing piston is fixedly connected with a micro-control elbow pipe. The lower end of the complete sealing piston is fixedly connected with a connecting block. A semi-circular sealing plug is fixedly arranged at the lower end of the connecting block. The lower end of the semi-circular sealing plug is fixedly connected with a connecting rod. The lower end of the connecting rod is fixedly connected with a sealing cone.

[0009] Preferably, compression springs are fixedly arranged at the front end and the rear end of the lower end face of the sealing cone. The lower ends of both compression springs are fixedly arranged with fixed blocks. A sealing seat is fixedly sleeved inside the injection pipe between the semi-circular sealing plug and the sealing cone.

[0010] Preferably, the rear end of the communicating pipe is fixedly connected with the front end of the temporary storage box. The upper end of the micro-control elbow pipe penetrates through the injection pipe and bends and extends to the upper part of the infrared control valve. The connection part of the injection pipe and the communicating pipe is on the same side as the semi-circular sealing plug. The fixed block is fixedly connected with the inner wall of the injection pipe. The lower end of the injection pipe is connected with the filling port of the refrigeration equipment.

[0011] Preferably, the end of the output pipe far from the high-pressure pump penetrates through the power chamber, and its outlet faces the rotating water wheel.

[0012] Preferably, the air inflating wheel is located inside the pressurizing elbow pipe, the small gear is located outside the pressurizing elbow pipe, the small gear and the large gear are meshed and connected, and the injection hole and the output pipe are respectively located on both sides of the rotating water wheel.

[0013] Preferably, a pressure sensor and a flow detector are respectively arranged at the upper end of the temporary storage box.

[0014] Working principle: When in use, since the lower part of the injection pipe is connected to the refrigeration equipment, when the refrigerant inside the refrigeration equipment is almost exhausted, the internal pressure decreases. After the pressure decreases, the sealing cone and the complete sealing piston move downward, and the compression spring is compressed. (Under normal conditions, the sealing seat and the sealing cone achieve sealing, and at the same time, the semi-circular sealing plug seals the connecting pipe). When the sealing cone and the complete sealing piston move downward, the sealing cone leaves the sealing seat, opening the channel between them, and the semi-circular sealing plug leaves the connecting pipe, opening the connecting pipe. At the same time, the micro-controlled bent pipe moves downward. When the infrared control valve detects that the distance of the micro-controlled bent pipe becomes shorter, the infrared control valve is opened, and the high-pressure refrigerant stored in the temporary storage tank is slowly injected into the refrigeration equipment, realizing the function of automatic refrigerant filling. When a certain amount of refrigerant is filled, the internal pressure of the refrigeration equipment increases and returns to normal pressure. Under the action of the elastic force of the compression spring, the sealing seat and the sealing cone achieve sealing, and at the same time, the semi-circular sealing plug seals the connecting pipe, and the infrared control valve closes;

[0015] Secondly, use the pressure sensor and the flow detector to detect the internal pressure of the temporary storage tank and the amount of refrigerant inside. When the refrigerant amount is insufficient or the pressure is insufficient, the high-pressure pump is turned on, but the high-pressure pump and the infrared control valve cannot be turned on at the same time, and the refrigerant stored in the temporary storage tank can provide multiple fillings. After the high-pressure pump is turned on, the normal-pressure refrigerant inside the refrigerant storage tank will first be injected into the power chamber through the input pipe and the output pipe, driving the first rotating rod to rotate, and then flow into the refrigerant temporary storage tank. The rotation of the first rotating rod drives the large gear to rotate, the rotation of the large gear drives the small gear to rotate, the rotation of the small gear drives the second rotating rod to rotate, and the rotation of the second rotating rod drives the inflation air wheel to rotate. When the inflation air wheel rotates, the one-way valve at the lower part of the pressurizing bent pipe can only let gas in and cannot let gas out, and the valve connecting the upper part to the temporary storage tank can also only let gas in and cannot let gas out. Therefore, the inflation air wheel in the middle will absorb the external air and inject it into the temporary storage tank, realizing pressurization while filling the refrigerant. When the pressure sensor detects that the internal pressure of the temporary storage tank is consistent with the normal pressure inside the refrigeration equipment, the pressurization is immediately stopped and the one-way valve is closed. One filling and pressurization can be used for multiple automatic fillings.

[0016] The present invention provides an energy-saving refrigeration equipment for automatic refrigerant filling. It has the following beneficial effects:

[0017] The present invention provides an energy-saving refrigeration device with automatic refrigerant filling. The energy-saving refrigeration device with automatic refrigerant filling provided by the present invention takes a pure mechanical linkage structure as the core, realizes non-electrified automatic filling through pressure difference drive, significantly reduces energy consumption, and the automatic filling mechanism operates autonomously based on the internal pressure change of the refrigeration device: when the pressure decreases due to refrigerant consumption, the sealed cone and the complete sealed piston compress the spring and move downward under the action of the pressure difference, synchronously releasing the double seals of the seal seat and the semi-circular seal plug, connecting the channels of the temporary storage tank and the refrigeration device, so that the pre-stored refrigerant with the same pressure is automatically injected under the drive of the pressure difference. The whole process does not require electronic sensors or control circuits, and only realizes the opening and closing control through spring reset and pressure balance, greatly reducing power consumption. The temporary storage mechanism intelligently manages the refrigerant reserve through a pressure sensor and a flow detector. The refrigerant supplemented by the single high-pressure pump can form high-pressure storage under the linkage mechanism of the pressure pipe and the inflation wind wheel, meeting the requirements of multiple automatic filling. The high-pressure pump is only started when the storage pressure is insufficient. When it operates, the refrigerant flows through the power chamber to drive the rotating water wheel, and the inflation wind wheel is synchronously pressurized through the gear set to the temporary storage tank, realizing the dual functions of refrigerant replenishment and pressure maintenance by a single high-pressure pump, further reducing the complexity of the device and energy consumption. The overall design highly integrates the functions of pressure difference utilization, automatic sealing, and energy storage pressurization through precise coordination of mechanical structures, while ensuring the filling accuracy, completely avoiding the redundant energy consumption problem of multi-device parallel connection, and conforming to the technical development trend of high efficiency, energy saving, and low carbon environmental protection. Brief Description of the Drawings

[0018] Figure 1 is the front orthographic axonometric schematic diagram of the present invention;

[0019] Figure 2 is the top orthographic axonometric schematic diagram of the present invention;

[0020] Figure 3 is the front sectional axonometric schematic diagram of the present invention;

[0021] Figure 4 is the axonometric schematic diagram of the automatic filling mechanism of the present invention;

[0022] Figure 5 is the sectional axonometric schematic diagram of the automatic filling mechanism of the present invention;

[0023] Figure 6 is the axonometric schematic diagram of the semi-circular seal plug of the present invention.

[0024] Among them, 1. Refrigerant storage mechanism; 2. Temporary storage mechanism; 3. Automatic filling mechanism; 101. Refrigerant storage tank; 102. High-pressure pump; 103. Output pipe; 104. Input pipe; 201. Temporary storage tank; 202. Injection hole; 203. Power chamber; 204. First rotating rod; 205. Rotating water wheel; 206. Check valve; 207. Large gear; 208. Inflatable wind wheel; 209. Small gear; 2010. Second rotating rod; 2011. Pressurized elbow pipe; 301. Injection pipe; 302. Micro-control elbow pipe; 303. Connecting pipe; 304. Infrared control valve; 305. Connecting rod; 306. Fixed block; 307. Compression spring; 308. Sealing cone; 309. Semi-circular sealing plug; 3010. Connecting block; 3011. Complete sealing piston; 3012. Sealing seat. Detailed implementation manner

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1 is as Figures 1 - 6 shown. The embodiment of the present invention provides an energy-saving refrigeration device for automatic refrigerant filling, including a refrigerant storage mechanism 1, a temporary storage mechanism 2, and an automatic filling mechanism 3. The refrigerant storage mechanism 1 includes a refrigerant storage tank 101. One end of the refrigerant storage tank 101 is fixedly connected to a high-pressure pump 102. The output end and the input end of the high-pressure pump 102 are respectively fixedly connected to an output pipe 103 and an input pipe 104.

[0027] The temporary storage mechanism 2 includes a temporary storage tank 201. A power chamber 203 is fixedly arranged at the center of the upper end of the temporary storage tank 201. A first rotating rod 204 is rotatably arranged at the center of one inner wall of the power chamber 203. The other end of the first rotating rod 204 penetrates through the power chamber 203 to the outside of the power chamber 203 and is fixedly provided with a large gear 207. A rotating water wheel 205 is fixedly sleeved on the rod body of the first rotating rod 204 located inside the power chamber 203. A pressurized elbow pipe 2011 penetrates through the outer wall of one side of the temporary storage tank 201 near the upper end. A second rotating rod 2010 is rotatably sleeved at the turning of the pressurized elbow pipe 2011. Small gears 209 and inflatable wind wheels 208 are respectively fixedly arranged at both ends of the second rotating rod 2010. Check valves 206 are fixedly arranged at the lower end of the pressurized elbow pipe 2011 and near the temporary storage tank 201. An injection hole 202 is opened between the temporary storage tank 201 and the power chamber 203.

[0028] The automatic filling mechanism 3 includes an injection pipe 301. At the upper rear side of the injection pipe 301, a connecting pipe 303 is fixedly connected. At the position of the connecting pipe 303 near the injection pipe 301, an infrared control valve 304 is fixedly arranged. An integral sealing piston 3011 is movably sleeved at the upper end inside the injection pipe 301. The upper end of the integral sealing piston 3011 is fixedly connected with a micro-control bent pipe 302. The lower end of the integral sealing piston 3011 is fixedly connected with a connecting block 3010. At the lower end of the connecting block 3010, a semi-circular sealing plug 309 is fixedly arranged. The lower end of the semi-circular sealing plug 309 is fixedly connected with a connecting rod 305. The lower end of the connecting rod 305 is fixedly connected with a sealing cone 308. At the front end and the rear end of the lower end surface of the sealing cone 308, compression springs 307 are fixedly arranged. The lower ends of the two compression springs 307 are fixedly provided with fixing blocks 306. Inside the injection pipe 301 between the semi-circular sealing plug 309 and the sealing cone 308, a sealing seat 3012 is fixedly sleeved. The rear end of the connecting pipe 303 is fixedly connected with the front end of the temporary storage tank 201. The upper end of the micro-control bent pipe 302 penetrates through the injection pipe 301 and bends and extends to the upper part of the infrared control valve 304. The connection part of the injection pipe 301 and the connecting pipe 303 is on the same side as the semi-circular sealing plug 309. The fixing block 306 is fixedly connected with the inner wall of the injection pipe 301. The lower end of the injection pipe 301 is connected with the filling port of the refrigeration device.

[0029] One end of the output pipe 103 away from the high-pressure pump 102 penetrates through the power chamber 203, and its outlet faces the rotating water wheel 205. The inflatable wind wheel 208 is located inside the pressurizing bent pipe 2011. The small gear 209 is located outside the pressurizing bent pipe 2011. The small gear 209 is meshed and connected with the large gear 207. The injection hole 202 and the output pipe 103 are respectively located on both sides of the rotating water wheel 205. A pressure sensor and a flow detector are respectively arranged at the upper end of the temporary storage tank 201.

[0030] Specifically: The automatic filling mechanism 3 operates autonomously based on the internal pressure change of the refrigeration device. When the refrigerant consumption causes the pressure to decrease, the sealing cone 308 and the integral sealing piston 3011 compress the spring 307 and move downward under the pressure difference, releasing the double sealing of the sealing seat 3012 and the semi-circular sealing plug 309, connecting the temporary storage tank 201 and the refrigeration device channel, and the refrigerant is automatically injected through the injection pipe 301. The whole process does not require an electronic sensor or a circuit, and only relies on mechanical pressure balance and spring reset to achieve opening and closing control, significantly reducing power consumption.

[0031] When the temporary storage mechanism 2 replenishes the refrigerant through the high-pressure pump 102, the refrigerant flows through the power chamber 203 to drive the rotating water wheel 205, which drives the first rotating rod 204 and the large gear 207, and links the small gear 209 with the inflating wind wheel 208, so that the pressurizing elbow 2011 sucks in external air to pressurize the temporary storage tank 201, forming a high-pressure reserve. A single replenishment can support multiple automatic refills, reducing the frequent startup of the high-pressure pump 102 and lowering energy consumption.

[0032] When the high-pressure pump 102 is running, the refrigerant flow drives the rotating water wheel 205, the small gear 209 and the large gear 207, driving the inflating wind wheel 208 to pressurize the temporary storage tank 201 synchronously. The two-way one-way valve 206 of the pressurizing elbow 2011 is combined to achieve pressure maintenance. A single high-pressure pump 102 simultaneously completes refrigerant replenishment and pressure increase, reducing additional energy consumption. The sealing cone 308 and the sealing seat 3012, the semi-circular sealing plug 309 form a double mechanical seal, and the infrared control valve 304 is combined to accurately control the filling timing, effectively preventing refrigerant leakage, reducing environmental pollution, and meeting environmental protection requirements. The automatic filling mechanism 3, the temporary storage mechanism 2 and the refrigerant storage mechanism 1 adopt a modular mechanical linkage design, without complex circuits or vulnerable electronic components, with a compact structure and low failure rate, and the maintenance cost is significantly reduced.

[0033] Example 2 is as Figures 1 - 6 shown. The embodiment of the present invention provides a specific implementation of an energy-saving refrigeration device for automatic refrigerant filling:

[0034] Pressure threshold response test

[0035] Laboratory simulation shows that when the pressure of the refrigeration device drops to 85% of the standard value (about 0.85 MPa), the sealing cone 308 drives the complete sealing piston 3011 to move downward under the pressure difference, the compression spring 307 compresses by a stroke of 5.2 mm, and the gap opening time between the sealing seat 3012 and the semi-circular sealing plug 309 is ≤ 0.3 seconds, realizing a rapid replenishment of the refrigerant flow rate ≥ 0.8 L / min, and the pressure difference driving efficiency reaches 92% (compared with the traditional solenoid valve, the energy consumption is reduced by 87%).

[0036] Transmission efficiency and pressurization ability

[0037] When the flow rate of the refrigerant of the rotating water wheel 205 is 2.5 L / s, the rotational speed reaches 120 rpm. Through the gear set (the tooth ratio of the large gear 207 to the small gear 209 is 5:1), the rotational speed of the inflating wind wheel 208 is increased to 600 rpm, and the air pressurization efficiency is 0.15 MPa / minute. Running the high-pressure pump 102 for 10 minutes once can increase the pressure of the temporary storage tank 201 to 2.5 MPa, meeting the demand for ≥ 8 automatic refills (each refill consumes a pressure of 0.3 MPa).

[0038] Table 1 Energy consumption data

[0039] Index Traditional electronic control system Technology of the present invention Energy consumption per single refueling (kW) 0.35 0.05 Annual operating energy consumption (kWh) 12,600 1,800 Starting frequency of high-pressure pump 8 times a day 2 times a week

[0040] Leakage rate test

[0041] In the pressure cycling test (0.5 - 2.5 MPa, 100,000 cycles), the leakage rate of the double-seal structure (sealing cone 308 + sealing seat 3012) ≤ 0.001 g / h, which is better than the requirement of Class AH of the international standard ISO 15848-1 (allowable leakage rate ≤ 0.01 g / h).

[0042] Table 2 Comparison of failure rates

[0043] Component Failure rate of traditional system (times / year) Failure rate of the present invention (times / year) Electronic control unit 4.2 0 (no electronic components) Sealing mechanism 1.8 0.3 Pressure-driven component 2.5 0.7

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving refrigeration device with automatic refrigerant filling, comprising a refrigerant storage mechanism (1), a temporary storage mechanism (2) and an automatic filling mechanism (3), characterized in that: The refrigerant storage mechanism (1) comprises a refrigerant storage box (101), one end of the refrigerant storage box (101) is fixedly connected to a high-pressure pump (102), and the output end and input end of the high-pressure pump (102) are respectively fixedly connected to an output pipe (103) and an input pipe (104); The temporary storage mechanism (2) comprises a temporary storage box (201), a power chamber (203) is fixedly arranged at the center of the upper end of the temporary storage box (201), a first rotating rod (204) is rotatably arranged at the center of the inner wall of one side of the power chamber (203), the other end of the first rotating rod (204) passes through the power chamber (203) to the outside of the power chamber (203), and a large gear (207) is fixedly arranged thereon, and a rotating water wheel (205) is fixedly sleeved on the body of the first rotating rod (204) located inside the power chamber (203), A pressurized curved pipe (2011) is provided through the outer wall of one side of the temporary storage box (201) near the upper end, a second rotating rod (2010) is rotatably sleeved at the turning point of the pressurized curved pipe (2011), a small gear (209) and an inflatable wind wheel (208) are fixedly provided at both ends of the second rotating rod (2010), a one-way valve (206) is fixedly provided at the lower end of the pressurized curved pipe (2011) and near the temporary storage box (201), and an injection hole (202) is provided between the temporary storage box (201) and the power chamber (203); The automatic filling mechanism (3) comprises an injection pipe (301), a connecting pipe (303) is fixedly connected to the upper end of the rear side of the injection pipe (301), and an infrared control valve (304) is fixedly provided on the connecting pipe (303) near the injection pipe (301); A complete sealing piston (3011) is movably sleeved at the upper end of the injection pipe (301), the upper end of the complete sealing piston (3011) is fixedly connected to a micro-control bending pipe (302), the lower end of the complete sealing piston (3011) is fixedly connected to a connecting block (3010), the lower end of the connecting block (3010) is fixedly provided with a semicircular sealing plug (309), the lower end of the semicircular sealing plug (309) is fixedly connected to a connecting rod (305), and the lower end of the connecting rod (305) is fixedly connected to a sealing cone (308); Compression springs (307) are fixedly provided at the front end and the rear end of the lower end surface of the sealing cone (308); fixing blocks (306) are fixedly provided at the lower ends of the two compression springs (307); and a sealing seat (3012) is fixedly provided inside the injection pipe (301) between the semicircular sealing plug (309) and the sealing cone (308); The rear end of the connecting pipe (303) is fixedly connected to the front end of the temporary storage box (201); the upper end of the micro-control bend pipe (302) passes through the injection pipe (301) and is bent to extend to the upper part of the infrared control valve (304); the connection point between the injection pipe (301) and the connecting pipe (303) is on the same side as the semicircular sealing plug (309); the fixing block (306) is fixedly connected to the inner wall of the injection pipe (301); and the lower end of the injection pipe (301) is connected to the filling port of the refrigeration equipment.

2. The energy-saving refrigeration equipment with automatic refrigerant filling according to claim 1 is characterized in that: One end of the output pipe (103) away from the high-pressure pump (102) passes through the power chamber (203), and its outlet faces the rotating water wheel (205).

3. The energy-saving refrigeration equipment with automatic refrigerant filling according to claim 1 is characterized in that: The inflatable wind wheel (208) is located inside the pressurized curved pipe (2011), the small gear (209) is located outside the pressurized curved pipe (2011), the small gear (209) and the large gear (207) are meshed and connected, and the injection hole (202) and the output pipe (103) are respectively located on both sides of the rotating water wheel (205).

4. The energy-saving refrigeration equipment with automatic refrigerant filling according to claim 1 is characterized in that: A pressure sensor and a flow detector are respectively provided at the upper end of the temporary storage box (201).

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