Replacement system of energy-saving, environment-friendly and efficient refrigerant for air conditioner

Abstract

The utility model discloses an energy-saving environment-friendly efficient refrigerant replacement system for an air conditioner. The refrigerant replacement system comprises an old refrigerant recovery part, a vacuumizing exhaust part and a new refrigerant filling part, the old refrigerant recycling part is communicated with a high-pressure service valve and a low-pressure service valve of the air conditioner compressor, so that the old refrigerant of the air conditioner compressor is completely discharged; the vacuumizing exhaust part is communicated with a high-pressure service valve and a low-pressure service valve of the air conditioner compressor, the vacuum pump is started repeatedly, and gas and liquid in the air conditioner refrigerating system are discharged till a vacuum state; a new refrigerant storage tank of the new refrigerant filling part is inversely arranged on a weighing device, a liquid outlet port of the new refrigerant storage tank is communicated with a liquid adding valve, the liquid adding valve is communicated with a high-pressure service valve of an air conditioner compressor through a hose, and new refrigerants are quantitatively added. The device has the advantages that old agents are recycled to protect the environment; new agents are quickly, accurately and efficiently injected, the optimal refrigerating effect is achieved, and the energy saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of refrigerant replacement, in particular to a system for replacing energy-saving, environmentally friendly and high-efficiency refrigerants for air conditioners. Background Art

[0002] In today's society, people increasingly pursue comfortable working and living environments, and air conditioners are an indispensable appliance in their lives. Air conditioners rely on compressors and refrigerants, achieving cooling or heating through processes such as refrigerant vaporization, liquefaction, and heat exchange. Over time, air conditioners experience a decline in cooling and heating capabilities. Furthermore, older air conditioners often use conventional refrigerants such as Freon R22, R410A, R32, and R134A. Compared to newer refrigerants (hydrocarbon refrigerants or the Learnuo series), these refrigerants have lower heat exchange coefficients and require higher compressor power and pressure. In both of these situations, people choose to replace the refrigerant in pursuit of better cooling performance and lower energy consumption.

[0003] Currently, the most common refrigerant replacement method involves workers first venting the old refrigerant directly into the atmosphere. Then, they invert the bottle and add the new refrigerant to the air conditioner compressor, using a quantity determined by experience. This method has several drawbacks: First, venting Freon directly into the air is environmentally unfriendly, severely damaging the ozone layer and significantly wasting resources. Second, workers rely on experience to refill the refrigerant, requiring multiple attempts to achieve a relatively accurate refill amount, resulting in low refill efficiency. Third, inaccurate refill amounts result in poor cooling performance and high energy consumption, and the compressor needs to operate for extended periods, which wastes energy. Utility Model Content

[0004] In order to solve one or more of the above problems, the present invention provides an energy-saving, environmentally friendly and efficient refrigerant replacement system for air conditioners.

[0005] According to one aspect of the present invention, a system for replacing an energy-saving, environmentally friendly and efficient refrigerant for an air conditioner comprises: an old refrigerant recovery unit, a vacuum exhaust unit and a new refrigerant filling unit;

[0006] The used refrigerant recovery unit includes a first manifold pressure gauge, a used refrigerant processor, and a used refrigerant storage tank. The first high-pressure port and the first low-pressure port of the first manifold pressure gauge are connected to the high-pressure service valve and the low-pressure service valve of the air-conditioning compressor respectively through hoses, and the first intermediate port thereof is connected to the used refrigerant processor through a hose. The used refrigerant processor is connected to the used refrigerant storage tank. When the air-conditioning compressor is turned on, the first high-pressure valve and the first low-pressure valve of the first manifold pressure gauge are opened to completely discharge the used refrigerant in the air-conditioning compressor.

[0007] The vacuum exhaust section includes a second manifold pressure gauge and a vacuum pump. The second high-pressure port and the second low-pressure port of the second manifold pressure gauge are connected to the high-pressure service valve and the low-pressure service valve of the air-conditioning compressor respectively through hoses, and the second intermediate port thereof is connected to the vacuum pump through a hose. The second high-pressure valve and the second low-pressure valve of the second manifold pressure gauge are opened, and the vacuum pump is repeatedly started to discharge gas and liquid in the air-conditioning refrigeration system until a vacuum state is reached.

[0008] The new agent filling part includes a new agent storage tank, a liquid adding valve and a weighing device. The new agent storage tank is inverted on the weighing device. The liquid outlet port of the new agent storage tank is connected to the liquid adding valve. The liquid adding valve is connected to the high-pressure inspection valve of the air-conditioning compressor through a hose. The air-conditioning compressor is in the closed state, the new agent storage tank is opened, the liquid adding valve is started, and new refrigerant is added to the air-conditioning compressor in a quantitative manner.

[0009] In some embodiments, a three-way electronic valve is further included, the first manifold pressure gauge and the second manifold pressure gauge are the same manifold pressure gauge, the air inlet port of the three-way electronic valve is connected to the first middle port of the first manifold pressure gauge, one air outlet port of the three-way electronic valve is connected to the used agent processor and the other air outlet port is connected to the vacuum pump.

[0010] In some embodiments, the old agent processor includes a dryer and an oil-liquid separator. The first intermediate port or the three-way electronic valve is connected to the drying chamber of the dryer through an intermediate pipeline. The dryer is connected to the separation area of the oil-liquid separator through an exhaust pipeline. The oil-liquid separator is connected to the old agent storage tank through a return pipe.

[0011] In some embodiments, a cock switch is further provided at the upper end of the spent agent storage tank, and an air suction pump is provided on the liquid return pipe;

[0012] Or the drying chamber of the dryer is filled with desiccant, the air outlet of the middle pipe is pre-buried in the desiccant; a filter is provided at the lower end of the desiccant;

[0013] Or the oil drain port at the lower end of the oil separator is connected to the old lubricating oil storage tank through the first oil return pipe, the oil drain port at the lower end of the dryer is connected to the old lubricating oil storage tank through the second oil return pipe, and the first oil return pipe and the second oil return pipe are connected to the old lubricating oil storage tank through a three-way joint.

[0014] In some embodiments, the liquid filling valve is a manual or electric one-way straight-through valve;

[0015] Or a first high-pressure pressure gauge is provided at the left end of the upper surface of the first manifold pressure gauge, a first low-pressure pressure gauge is provided at the right end, and a first fixed end is provided in the middle. The structure of the second manifold pressure gauge is the same as that of the first manifold pressure gauge, the high-pressure parts are red, and the low-pressure parts are blue.

[0016] In some embodiments, a bottle fixing rack is further included, on which a plurality of bottle holders are provided. New agent storage tanks, old agent storage tanks, and old lubricant storage tanks can be detachably fixed in each bottle holder; the bottle fixing rack can be detachably connected to a mobile trolley.

[0017] In some embodiments, the bottle holder includes a holding base fixedly arranged on the bottle fixing rack, the upper end of the holding base is provided with a circular bottle fixing groove, and the lower end of the bottle fixing groove is provided with a center wire through hole;

[0018] There are several radial grooves in a circumferential array on the bottle fixing groove. Two opposite arc clips are placed in the bottle fixing groove and the radial sliders at their lower ends are slidably fitted in the radial grooves. An elastic member is also provided between the arc clips and the inner wall of the holding base.

[0019] In some embodiments, the arc clip is a rubber plate; the elastic member is a spring or an air bag, or a weighing device is placed on the bottom surface of the bottle fixing groove or in the center through hole.

[0020] In some embodiments, the system further comprises a control frame fixed to one side of the bottle fixing frame, wherein a first manifold pressure gauge, a second manifold pressure gauge, a vacuum pump, a liquid adding valve, and a three-way electronic valve are fixed to the control frame;

[0021] Or it may further include a control unit fixed on the control frame, and the control unit is also electrically connected to the operating unit.

[0022] In some embodiments, a high-seal environmentally friendly connector is further included, wherein the outer end of the quick-connect connector of the high-seal environmentally friendly connector is directly connected to the ends of the high-pressure pipe and the low-pressure pipe, and the other end of the quick-connect connector can be directly inserted into the joints or pipe holes of the high-pressure and low-pressure service valves of the interference sleeve air-conditioning compressor;

[0023] The rear end of the quick-connect connector is provided with a large-sized base plate and the front end is slidably connected to a truncated cone-shaped or bowl-shaped sealing cover. The sealing cover is made of elastic plastic. A plurality of protruding guide prisms are arranged in a circular array on the outer wall of the quick-connect connector. The inner wall of the shaft hole of the sealing cover is provided with a plurality of concave guide grooves. The guide groove sleeves the guide prisms. The rear end of the spring sleeve on the quick-connect connector is connected to the base plate and the front end is connected to the rear end of the sealing cover.

[0024] The beneficial effects of the energy-saving, environmentally friendly and efficient refrigerant replacement system for air conditioners are: first, old refrigerant is effectively recycled, which is beneficial to environmental protection, reduces the greenhouse effect, and optimizes resource reuse; second, the filling is automatically controlled by the valve, and the weight filling is controlled by a weighing device, which can achieve fast and accurate filling and efficient refrigerant filling; third, the filling amount is accurate, the filling time is short, and the refrigeration effect is good, which is conducive to achieving the optimal refrigeration effect and saving energy; fourth, the automatic recovery of old agents, vacuuming and adding of new agents avoids errors caused by human factors. At the same time, the vacuuming operation can completely remove impurities in the refrigeration system and avoid impurity contamination; fifth, the new agent is added through the high-pressure port, which is fast and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic front view of an energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to embodiment (1) of the present utility model;

[0026] Figure 2 for Figure 1 The schematic diagram of the used agent recovery unit in operation is shown in (1);

[0027] Figure 3 for Figure 1 Schematic diagram of the used agent recovery unit in operation (2);

[0028] Figure 4 for Figure 1 The schematic diagram of the vacuum exhaust unit shown is in operation;

[0029] Figure 5 for Figure 1 The schematic diagram of the new agent filling unit shown is in operation;

[0030] Figure 6 for Figure 1 A schematic front view of the first manifold pressure gauge is shown;

[0031] Figure 7 for Figure 1 A schematic top view of the bottle holder shown;

[0032] Figure 8 for Figure 7 A schematic cross-sectional view of the bottle holder shown;

[0033] Figure 9 for Figure 1 A three-dimensional schematic diagram of a high-seal environmentally friendly connector is shown;

[0034] Figure 10 for Figure 9 A schematic cross-sectional view of the high-seal environmentally friendly connector shown;

[0035] Figure 11This is a schematic front view of an energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to embodiment (1) of the present utility model;

[0036] Figure 12 for Figure 11 A partially enlarged schematic diagram of a replacement system for an energy-saving, environmentally friendly and efficient refrigerant for an air conditioner is shown;

[0037] Air conditioning compressor 00, high pressure service valve 001, low pressure service valve 002;

[0038] Used lubricant recovery unit 01, first manifold pressure gauge 1, first main block 10, first high-pressure port 11, first low-pressure port 12, first high-pressure valve 13, first low-pressure valve 14, first intermediate port 15, first low-pressure pressure gauge 16, first high-pressure pressure gauge 17, first fixed end 18, intermediate pipeline 19; used lubricant processor 2, dryer 21, oil-liquid separator 22, first oil return pipe 23, second oil return pipe 24, exhaust pipe 25, used lubricant storage tank 3, suction pump 30, liquid return pipe 31, stopcock 32, used lubricant storage tank 4;

[0039] Vacuum exhaust part 02, second manifold pressure gauge 5, second main block 50, second high-pressure port 51, second low-pressure port 52, second high-pressure valve 53, second low-pressure valve 54, second intermediate port 55, second low-pressure pressure gauge 56, second high-pressure pressure gauge 57, second fixed end 58, vacuum pump 6;

[0040] New agent filling part 03, new agent storage tank 7, liquid filling valve 8, weighing device 9;

[0041] Three-way electronic valve 04; bottle holder 05;

[0042] Bottle holder 06, holding base 060, arc clip 061, elastic member 062, radial slide 063, radial slider 064, bottle fixing groove 065, center line through hole 066;

[0043] Mobile car 07; control frame 08;

[0044] High-sealed environmentally friendly connector 09, quick-connect connector 090, base plate 091, sealing cover 092, guide prism 093, guide groove 094, spring 095;

[0045] Control unit 010; Operation unit 011. DETAILED DESCRIPTION

[0046] The present invention will be described in further detail below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0047] Figures 1 to 10 The schematic diagram shows a system for replacing energy-saving, environmentally friendly, and efficient refrigerant for air conditioners according to embodiment (1) of the present invention. As shown in the figure, the system for replacing energy-saving, environmentally friendly, and efficient refrigerant for air conditioners includes: an old refrigerant recovery unit 01, a vacuum exhaust unit 02, and a new refrigerant charging unit 03;

[0048] The used refrigerant recovery unit 01 includes a first manifold pressure gauge 1, a used refrigerant processor 2, and a used refrigerant storage tank 3. The first high-pressure port 11 and the first low-pressure port 12 of the first manifold pressure gauge 1 are connected to the high-pressure service valve 001 and the low-pressure service valve 002 of the air-conditioning compressor 00, respectively, through hoses. The first intermediate port 15 is connected to the used refrigerant processor 2 through a hose. The used refrigerant processor 2 is connected to the used refrigerant storage tank 3. When the air-conditioning compressor 00 is in the on state, the first high-pressure valve 13 and the first low-pressure valve 14 of the first manifold pressure gauge 1 are opened to completely discharge the used refrigerant in the air-conditioning compressor 00.

[0049] The vacuum exhaust section 02 includes a second manifold pressure gauge 5 and a vacuum pump 6. The second high-pressure port 51 and the second low-pressure port 52 of the second manifold pressure gauge 5 are connected to the high-pressure service valve 001 and the low-pressure service valve 002 of the air-conditioning compressor 00, respectively, through hoses. The second intermediate port 55 is also connected to the vacuum pump 6 through a hose. The second high-pressure valve 53 and the second low-pressure valve 54 of the second manifold pressure gauge 5 are opened, and the vacuum pump 6 is repeatedly started to discharge gas and liquid in the air-conditioning refrigeration system until a vacuum state is reached.

[0050] The fresh refrigerant filling unit 03 includes a fresh refrigerant storage tank 7, a refilling valve 8, and a weighing scale 9. The fresh refrigerant storage tank 7 is placed upside down on the weighing scale 9. The liquid outlet of the fresh refrigerant storage tank 7 is connected to the refilling valve 8, which is preferably a manual or electric one-way valve. The refilling valve 8 is connected to the high-pressure service valve 001 of the air conditioning compressor 00 via a flexible hose. When the air conditioning compressor 00 is closed, the fresh refrigerant storage tank 7 is opened, and the refilling valve 8 is activated, allowing a fixed amount of fresh refrigerant to be added to the air conditioning compressor 00.

[0051] The beneficial effects of this replacement system are: first, the old refrigerant is effectively recycled, which is beneficial to environmental protection, reduces the greenhouse effect, and optimizes resource reuse; second, the filling is automatically controlled by the valve, and the weight filling is controlled by the weighing device 9, which can achieve fast and accurate filling and efficient filling of the refrigerant; third, the filling amount is accurate, the filling time is short, and the refrigeration effect is good, which is conducive to achieving the optimal refrigeration effect and saving energy; fourth, the automatic recovery of old agents, vacuuming and adding of new agents avoids errors caused by human factors. At the same time, the vacuuming operation can completely remove impurities in the refrigeration system and avoid impurity contamination; fifth, the new agent is added through the high-pressure port, the speed is fast, and the filling is efficient.

[0052] Figures 11 to 12 A schematic diagram illustrates an energy-saving, environmentally friendly, and high-efficiency refrigerant replacement system for air conditioners according to Embodiment 2 of the present invention. This system differs from Embodiment 1 in that it also includes a three-way electronic valve 04, the first manifold pressure gauge 1 and the second manifold pressure gauge 5 are the same manifold pressure gauge, the inlet port of the three-way electronic valve 04 is connected to the first intermediate port 15 of the first manifold pressure gauge 1, one outlet port of the three-way electronic valve 04 is connected to the refrigerant treatment unit 2, and the other outlet port is connected to the vacuum pump 6. While maintaining the same benefits as Embodiment 1, it also offers the following advantages: First, the refrigerant treatment unit 2 and the vacuum exhaust unit 02 share a single set of first manifold pressure gauges 1, eliminating one set of piping and reducing device cost and size. Second, the refrigerant treatment unit 2 and the vacuum exhaust unit 02 share a single set of connecting piping. Therefore, when performing both functions, there's no need to remove the original connecting piping and install a new one. This streamlines replacement procedures, reduces replacement time, and improves replacement efficiency, resulting in greater efficiency and energy conservation.

[0053] The following is a specific system of an energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners in embodiment (II): it includes: an old refrigerant recovery unit 01, a vacuum exhaust unit 02, a new refrigerant filling unit 03 and a three-way electronic valve 04;

[0054] The used refrigerant recovery unit 01 includes a first manifold pressure gauge 1, a processor 2, and a used refrigerant storage tank 3. The first high-pressure port 11 and the first low-pressure port 12 of the first manifold pressure gauge 1 are respectively connected to the high-pressure service valve 001 and the low-pressure service valve 002 of the air-conditioning compressor 00 through a hose, and its first intermediate port 15 is connected to the air inlet port of the three-way electronic valve 04 through a hose. A first air outlet port of the three-way electronic valve 04 is connected to the used refrigerant processor 2, and the used refrigerant processor 2 is connected to the used refrigerant storage tank 3. The air-conditioning compressor 00 is in the on state, and the first high-pressure valve 13 and the first low-pressure valve 14 of the first manifold pressure gauge 1 are opened. The air inlet port of the three-way electronic valve 04 and the air outlet port connected to the used refrigerant processor 2 are connected, so that the used refrigerant in the air-conditioning compressor 00 is completely discharged;

[0055] The vacuum exhaust section 02 includes a vacuum pump 6, which is connected to the other outlet port of the three-way electronic valve 04. The air-conditioning compressor 00 is turned on, the first high-pressure valve 13 and the first low-pressure valve 14 of the first manifold pressure gauge 1 are opened, and the air inlet port of the three-way electronic valve 04 is connected to the outlet port connected to the vacuum pump 6. The vacuum pump 6 is repeatedly started to discharge the gas and liquid in the air-conditioning refrigeration system until a vacuum state is reached.

[0056] The fresh refrigerant filling unit 03 includes a fresh refrigerant storage tank 7, a refilling valve 8, and a weighing scale 9. The fresh refrigerant storage tank 7 is placed upside down on the weighing scale 9. The liquid outlet of the fresh refrigerant storage tank 7 is connected to the refilling valve 8, which is preferably a manual or electric one-way valve. The refilling valve 8 is connected to the high-pressure service valve 001 of the air conditioning compressor 00 via a flexible hose. When the air conditioning compressor 00 is closed, the fresh refrigerant storage tank 7 is opened, and the refilling valve 8 is activated, allowing a fixed amount of fresh refrigerant to be added to the air conditioning compressor 00.

[0057] Furthermore, in the two aforementioned embodiments, one of the LEARNUO series refrigerants is preferably 2,3,3,3-tetrafluoroethylene, and the compressor is a conventional compressor. When the cooling and heating equipment is a 1.5-HP air conditioner, the refrigerant charge is 0.5-0.65 kg, and the pressure is 0.35-0.45 MPa. This compares to the approximately 1.25 kg charge and 0.5-0.8 MPa pressure of conventional refrigerants (R22, R410A, R32, R134A, etc.). This lower operating pressure and significantly reduced charge improves cooling efficiency while reducing energy consumption by 25%, resulting in more environmentally friendly, energy-saving, and efficient cooling.

[0058] Furthermore, in the above two embodiments, if Figure 3 As shown, the old agent processor 2 includes a dryer 21 and an oil-liquid separator 22, and the first intermediate port 15 is connected to the drying chamber of the dryer 21 through the intermediate pipe 19. The air outlet of the dryer 21 is connected to the separation area of the oil-liquid separator 22 through the exhaust pipe 25, and the air outlet of the oil-liquid separator 22 is connected to the old agent storage tank 3 through the return pipe 31, wherein the intermediate pipe 19 and the exhaust pipe 25 are preferably curved pipes. The upper end of the old agent storage tank 3 is preferably provided with a stopcock switch 32 and the return pipe 31 is provided with an air suction pump 30; a preferred structure of the dryer 21 is: the drying chamber is filled with desiccant, the air outlet of the intermediate pipe 19 is pre-buried in the desiccant; and a filter is provided at the lower end of the desiccant. Its beneficial effect is that the old agent processor 2 can effectively separate the old refrigerant and separate the lubricating oil and water vapor therein, which is beneficial to the subsequent resource reuse and environmental protection.

[0059] Preferably, in the above-mentioned used lubricant treatment device 2, the oil discharge port at the lower end of the oil-liquid separator 22 is connected to the used lubricant storage tank 4 via a first oil return pipe 23, and the oil discharge port at the lower end of the dryer 21 is connected to the used lubricant storage tank 4 via a second oil return pipe 24. Preferably, the first oil return pipe 23 and the second oil return pipe 24 are connected to the used lubricant storage tank 4 via a three-way joint. The beneficial effect is that this arrangement can effectively recycle used lubricant and is beneficial to environmental protection.

[0060] Furthermore, in the above two embodiments, plug valves are provided on the ports of the new agent storage tank 7 and the old agent storage tank 3 and on the connected pipelines. Combined with the sealing function of the pipe valves, the contents of the tanks are effectively sealed, and each action of replacing the refrigerant is accurately performed.

[0061] Furthermore, in the above two embodiments, if Figures 7 to 8 As shown, the system also includes a bottle rack 05 equipped with several bottle holders 06. The new agent storage tank 7, the used agent storage tank 3, and the used lubricant storage tank 4 are removably secured in each bottle holder 06. The bottle rack 05 is preferably capable of being snapped or threaded, or directly secured to a mobile trolley 07, which can be either manual or powered. The beneficial effect of the arrangement of the bottle rack 05 and bottle holders 06 is that each container can be quickly and accurately positioned, improving operational efficiency.

[0062] Preferably, the bottle holder 06 includes a holding base 060 fixedly arranged on the bottle fixing rack 05, a circular bottle fixing groove 065 is provided at the upper end of the holding base 060, and a center line through hole 066 is provided at the lower end of the bottle fixing groove 065; a plurality of radial slide grooves 063 are arranged in a circumferential array on the bottle fixing groove 065, two opposite arc clips 061 are placed in the bottle fixing groove 065 and the radial slider 064 at the lower end thereof is slidably fitted in the radial slide groove 063, and an elastic member 062 is also provided between the arc clip 061 and the inner wall of the holding base 060. The elastic member 062 is preferably a spring or an airbag, and the arc clip 061 is preferably a rubber plate; its beneficial effects are: first, the bottle holder 06 realizes elastic clamping, fast clamping, and is beneficial to protecting the container; second, it can change the size in a small range at the same time, and is suitable for containers of various sizes, so multiple modules can be assembled to achieve more functions; third, the cooperation of the radial slide groove and the slider can realize precise elastic clamping, making the clamping more complete; fourth, a lower center wire through hole 066 is provided, which is convenient for pipelines to pass through and can effectively reduce the volume of the product.

[0063] Preferably, the weighing device 9 is placed on the bottom surface of the bottle fixing groove 065 or in the center line through hole 066. Its beneficial effect is that: this setting further simplifies the product structure and facilitates assembly.

[0064] Preferably, it also includes a control frame 08 fixed on one side of the bottle fixing frame 05, a first manifold pressure gauge 1, a second manifold pressure gauge 5, a vacuum pump 6, a liquid adding valve 8, and a three-way electronic valve 04 fixed on the control frame 08;

[0065] It also includes a control unit 010 fixed on the control frame 08, which is connected to each valve component and electrically connected to an operating unit 011, which is fixed on the bottle fixing frame 05. The beneficial effect is that this arrangement can improve the automation level of the system operation and help save energy.

[0066] Furthermore, in the above two embodiments, if Figures 9 to 10 As shown, it also includes a high-seal, environmentally friendly connector 09. The outer end of its quick-connect connector 090 is directly connected to the ends of the high-pressure and low-pressure pipes, and the other end of the quick-connect connector 090 can be directly inserted into the joints or pipe holes of the high-pressure and low-pressure service valves 001 and 002 of the air-conditioning compressor 00. The rear end of the quick-connect connector 090 is equipped with a large base plate 091, and the front end is slidably connected to a frustum-shaped or bowl-shaped sealing cover 092. The sealing cover 092 is made of elastic plastic. The outer wall of the quick-connect connector 090 is arranged with a plurality of protruding guide prisms 093 in an array. The inner wall of the axial hole of the sealing cover 092 is provided with a plurality of concave guide grooves 094. The guide grooves 094 are sleeved by the guide prisms 093. The spring 095 sleeved on the quick-connect connector 090 is connected to the base plate 091 at the rear end and to the rear end of the sealing cover 092 at the front end. The advantages are as follows: First, the highly sealed environmentally friendly connector 09 can seal the connection end, preventing gas from migrating out of the connection end and liquid from spilling out, effectively avoiding operational pollution and achieving environmentally friendly operation. Second, the guide device enables quick assembly and disassembly, and the elastic structure enables elastic pressing.

[0067] Further, if Figure 6 As shown, the first manifold pressure gauge 1 includes a first main block 10, the left end of the first main block 10 is connected to the first high-pressure valve 13 and the right end is connected to the first low-pressure valve 14, the left end of the lower surface of the first main block 10 is connected to the first high-pressure port 11, the right end is connected to the first low-pressure port 12, and a first intermediate port 15 is provided in the middle, and the left end of the upper surface of the first main block 10 is provided with a first high-pressure pressure gauge 17, the right end is provided with a first low-pressure pressure gauge 16, and the middle is provided with a first fixed end 18.

[0068] The structure of the second manifold pressure gauge 5 is the same as that of the first manifold pressure gauge 1. The second manifold pressure gauge 5 includes a second main block 50, the left end of the second main block 50 is connected to the second high-pressure valve 53 and the right end is connected to the second low-pressure valve 54. The right end of the lower surface of the second main block 50 is connected to the second low-pressure port 52, the left end is connected to the second high-pressure port 51, and a second intermediate port 55 is provided in the middle. The right end of the upper surface of the second main block 50 is provided with a second low-pressure pressure gauge 56, the left end is provided with a second high-pressure pressure gauge 57, and a second fixed end 58 is provided in the middle. The low-pressure pipe is connected to the first low-pressure port 12 and the second low-pressure port 52, the high-pressure pipe is connected to the first high-pressure port 11 and the second high-pressure port 51, and the return pipe is connected to the first intermediate port 15 and the second intermediate port 55. Its beneficial effect is that the manifold pressure gauge with this arrangement can accurately realize the three-way connection, is suitable for high and low pressure environments, and is convenient to operate and observe the operating status, realizing the preferred operating steps.

[0069] Preferably, the first high-pressure valve 13, the first high-pressure pressure gauge 17, the second high-pressure valve 53, the second high-pressure pressure gauge 57 and the high-pressure pipe are red parts, and the first low-pressure valve 54, the second low-pressure valve 54, the first low-pressure pressure gauge 16, the second low-pressure pressure gauge 56 and the low-pressure pipe are blue parts;

[0070] Alternatively, the first high-pressure valve 13, the second high-pressure valve 53, the first low-pressure valve 54, and the second low-pressure valve 54 are manual valves or electromagnetic control valves. The beneficial effect is that this arrangement enables operators to quickly identify, avoid incorrect assembly, and achieve efficient replacement.

[0071] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A system for replacing energy-saving, environmentally friendly and efficient refrigerant for air conditioners, characterized in that: It includes: an old agent recovery section (01), a vacuum exhaust section (02) and a new agent filling section (03); The old agent recovery unit (01) includes a first manifold pressure gauge (1), an old agent processor (2) and an old agent storage tank (3), wherein the first high-pressure port (11) and the first low-pressure port (12) of the first manifold pressure gauge (1) are respectively connected to the high-pressure inspection valve (001) and the low-pressure inspection valve (002) of the air-conditioning compressor (00) through a hose, and the first intermediate port (15) thereof is connected to the old agent processor (2) through a hose, and the old agent processor (2) is connected to the old agent storage tank (3), and the air-conditioning compressor (00) is in an open state, and the first high-pressure valve (13) and the first low-pressure valve (14) of the first manifold pressure gauge (1) are opened to completely discharge the old refrigerant of the air-conditioning compressor (00); The vacuum exhaust section (02) includes a second manifold pressure gauge (5) and a vacuum pump (6), wherein the second high-pressure port (51) and the second low-pressure port (52) of the second manifold pressure gauge (5) are connected to the high-pressure inspection valve (001) and the low-pressure inspection valve (002) of the air-conditioning compressor (00) through hoses, respectively, and the second intermediate port (55) thereof is connected to the vacuum pump (6) through a hose. The second high-pressure valve (53) and the second low-pressure valve (54) of the second manifold pressure gauge (5) are opened, and the vacuum pump (6) is repeatedly started to discharge gas and liquid in the air-conditioning refrigeration system until a vacuum state is reached; The new agent filling part (03) includes a new agent storage tank (7), a liquid adding valve (8) and a weighing device (9). The new agent storage tank (7) is inverted on the weighing device (9). The liquid outlet port of the new agent storage tank (7) is connected to the liquid adding valve (8). The liquid adding valve (8) is connected to the high-pressure inspection valve (001) of the air-conditioning compressor (00) through a hose. When the air-conditioning compressor (00) is in a closed state, the new agent storage tank (7) is opened, the liquid adding valve (8) is started, and new refrigerant is quantitatively added to the air-conditioning compressor (00).

2. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 1 is characterized in that: It also includes a three-way electronic valve (04), the first manifold pressure gauge (1) and the second manifold pressure gauge (5) are the same manifold pressure gauge, the air inlet port of the three-way electronic valve (04) is connected to the first middle port (15) of the first manifold pressure gauge (1), one air outlet port of the three-way electronic valve (04) is connected to the waste agent processor (2) and the other air outlet port is connected to the vacuum pump (6).

3. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 1 is characterized in that: The used agent processor (2) includes a dryer (21) and an oil-liquid separator (22); the first intermediate port (15) is connected to a drying chamber of the dryer (21) via an intermediate pipeline (19); the dryer (21) is connected to a separation area of the oil-liquid separator (22) via an exhaust pipeline (25); and the oil-liquid separator (22) is connected to a used agent storage tank (3) via a liquid return pipe (31).

4. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 3 is characterized in that: The upper end of the waste agent storage tank (3) is also provided with a cock switch (32), and the return liquid pipe (31) is provided with an air suction pump (30); Or the drying chamber of the dryer (21) is filled with a desiccant, and the air outlet of the intermediate pipeline (19) is pre-buried in the desiccant; a filter is provided at the lower end of the desiccant; Or the oil discharge port at the lower end of the oil-liquid separator (22) is connected to the old lubricating oil storage tank (4) through the first oil return pipe (23), the oil discharge port at the lower end of the dryer (21) is connected to the old lubricating oil storage tank (4) through the second oil return pipe (24), and the first oil return pipe (23) and the second oil return pipe (24) are connected to the old lubricating oil storage tank (4) through a three-way joint.

5. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 1 is characterized in that: The liquid adding valve (8) is a manual or electric one-way straight-through valve; Or the first manifold pressure gauge (1) is provided with a first high-pressure pressure gauge (17) at the left end of the upper surface, a first low-pressure pressure gauge (16) at the right end, and a first fixed end (18) in the middle. The second manifold pressure gauge (5) has the same structure as the first manifold pressure gauge (1), with high-pressure parts in red and low-pressure parts in blue.

6. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 1, characterized in that: It also includes a bottle fixing rack (05), wherein the bottle fixing rack (05) is provided with a plurality of bottle holders (06), and a new agent storage tank (7), an old agent storage tank (3), and an old lubricating oil storage tank (4) are detachably fixed in each bottle holder (06); and the bottle fixing rack (05) is detachably connected to a mobile trolley (07).

7. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 6, characterized in that: The bottle holder (06) comprises a holding base (060) fixedly arranged on the bottle fixing frame (05); the upper end of the holding base (060) is provided with a circular bottle fixing groove (065); the lower end of the bottle fixing groove (065) is provided with a central wire through hole (066); The bottle fixing groove (065) has a plurality of radial sliding grooves (063) arranged in a circumferential array. Two opposing arc clips (061) are placed in the bottle fixing groove (065) and radial sliders (064) at their lower ends are slidably fitted in the radial sliding grooves (063). An elastic member (062) is further provided between the arc clips (061) and the inner wall of the holding base (060).

8. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 7, characterized in that: The arc clip (061) is a rubber plate; the elastic member (062) is a spring or an air bag; or the weighing device (9) is placed on the bottom surface of the bottle fixing groove (065) or in the center line through hole (066).

9. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 6, characterized in that: It also includes a control frame (08) fixed to one side of the bottle fixing frame (05), and a first manifold pressure gauge (1), a second manifold pressure gauge (5), a vacuum pump (6), a liquid adding valve (8), and a three-way electronic valve (04) are fixed to the control frame (08); Alternatively, the device further includes a control unit (010) fixed on the control frame (08), wherein the control unit (010) is also electrically connected to the operating unit (011).

10. The energy-saving, environmentally friendly and high-efficiency refrigerant replacement system for air conditioners according to claim 1, characterized in that: It also includes a high-seal environmentally friendly connector (09), the outer end of the quick-connect connector (090) of the high-seal environmentally friendly connector (09) is directly connected to the ends of the high-pressure pipe and the low-pressure pipe, and the other end of the quick-connect connector (090) can be directly inserted into the connector or pipe hole of the high-pressure inspection valve (001) and the low-pressure inspection valve (002) of the interference sleeve air-conditioning compressor (00); The quick-connect connector (090) is provided with a large-sized base plate (091) at the rear end and a truncated cone-shaped or bowl-shaped sealing cover (092) is slidably connected at the front end. The sealing cover (092) is made of elastic plastic. A plurality of protruding guide prisms (093) are arranged in a circumferential array on the outer wall of the quick-connect connector (090). The inner wall of the shaft hole of the sealing cover (092) is provided with a plurality of concave guide grooves (094). The guide grooves (094) are sleeved with the guide prisms (093). The spring (095) sleeved on the quick-connect connector (090) is connected to the base plate (091) at the rear end and connected to the rear end of the sealing cover (092) at the front end.

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