A gas-liquid separation enhancement and expansion device for household air-conditioning compressor

Abstract

The utility model provides a gas-liquid separation enhancement and capacity expansion device for a household air-conditioning compressor, which comprises a closed-loop oscillating heat pipe heat exchanger assembly; the oscillating heat pipe heat exchanger assembly comprises a heat pipe solar collector evaporator section, a compressor waste heat recovery heat pipe evaporator section and a heat pipe condenser section; the heat pipe condenser section comprises a refrigerant return air heat exchanger thickening section, and a solar collector heat pipe condenser section and a heat recovery heat pipe condenser section are arranged in the refrigerant return air heat exchanger thickening section; the solar collector heat pipe condenser section is connected to the heat pipe solar collector evaporator section; the heat recovery heat pipe condenser section is connected to the compressor waste heat recovery heat pipe evaporator section; the refrigerant return air heat exchanger thickening section is connected to the gas-liquid separator inlet through the refrigerant system return air pipe. The utility model has the characteristics of utilizing an external heat source to expand the capacity of the gas-liquid separator, enhance the gas-liquid separation effect, and reduce the probability of the risk of "liquid hammer".

Description

Technical Field

[0001] The utility model relates to a gas-liquid separation enhancement and expansion device for a household air-conditioning compressor, and relates to the field of heating, ventilation and air conditioning. Background Art

[0002] Gas can be compressed by the compressor, but liquid cannot be compressed, so the return air port of household air conditioner compressors generally carries a gas-liquid separator to ensure that the compressor sucks in gaseous refrigerant without droplets. The main function of the gas-liquid separator is to precipitate and evaporate a small amount of refrigerant liquid contained in the refrigerant, ensuring that the refrigerant sucked by the compressor is gas, so as to avoid a small amount of mixed lubricating oil droplets contained in the return air causing liquid shock accidents and damage to the compressor; for this purpose, the refrigerant return air superheat must be increased (generally 3--5℃), and a gas-liquid separator must be installed at the return air port to ensure that the refrigerant absorbed by the compressor is completely and must be gas when sucked into the compressor. However, in practice, due to various reasons, a small amount of liquid refrigerant droplets (usually refrigerant-lubricant mixture) that have not been completely evaporated in the refrigerant return gas are sucked into the compressor, causing liquid hammer and damaging the compressor; especially in winter when the temperature is low and the heating capacity is reduced, in order to maintain a reasonable superheat, the expansion valve opening is reduced, and the refrigerant evaporation mass flow is small. If the expansion valve opening is not properly adjusted (household air conditioners are generally capillary throttling, not intelligent throttling), those refrigerant-lubricant mixture droplets that have not been completely evaporated will be mixed in the refrigerant return gas and return to the compressor. Due to the capacity limitation of the gas-liquid separator, there will still be "slippery fish" - the refrigerant and lubricant mixture is not completely evaporated, and will be sucked into the compressor to cause liquid hammer accidents. At the same time, during the operation of the compressor, the compressor body heats up, and a large amount of waste heat is dissipated into the atmosphere without being used (about 10%-15% of the compressor's power consumption is converted into heat energy and wasted). Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a household air-conditioning compressor gas-liquid separation enhancement and expansion device which utilizes external heat sources, such as solar energy natural heat sources and compressor waste heat recovery heat sources, to expand the gas-liquid separator capacity, strengthen the gas-liquid separation effect, and reduce the probability of "liquid hammer" risk.

[0004] In order to achieve the above technical problems, the technical solution adopted by the utility model is:

[0005] A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor, comprising a closed-loop oscillating heat pipe heat exchanger assembly;

[0006] The oscillating heat pipe heat exchanger assembly includes a heat pipe solar collector evaporation section, a compressor waste heat recovery heat pipe evaporation section, and a heat pipe condensation section;

[0007] The heat pipe condensation section includes a thickened section of a refrigerant return air heat exchanger, in which a solar collector heat pipe condensation section and a heat recovery heat pipe condensation section are arranged;

[0008] The solar collector heat pipe condensing pipe section is connected to the heat pipe solar collector evaporating section;

[0009] The heat recovery heat pipe condensing pipe section is connected to the compressor waste heat recovery heat pipe evaporating pipe section;

[0010] The solar collector heat pipe condensing pipe section and the heat recovery heat pipe condensing pipe section are connected in parallel and are independent of each other;

[0011] The thickened section of the refrigerant return air heat exchanger is communicated with the inlet of the gas-liquid separator through the refrigerant system return air pipe.

[0012] Furthermore, the solar collector heat pipe condensing pipe section and the heat recovery heat pipe condensing pipe section are spiral in shape.

[0013] Furthermore, the heat pipe solar collector evaporation section is arranged in an oscillating heat pipe solar collector evaporation section assembly, and the oscillating heat pipe solar collector evaporation section assembly is composed of a collector outer frame, a collector transparent cover, a heat pipe solar collector evaporation section, a heat absorption coating sheet, and a collector insulation layer from outside to inside;

[0014] The collector transparent cover plate covers the inside of the collector outer frame;

[0015] The interior of the collector outer frame is provided with a heat pipe solar collector evaporation section and a collector insulation layer laid on the bottom of the collector outer frame.

[0016] Furthermore, the evaporation section of the heat pipe solar collector is formed by bending the first heat pipe capillary to form a serpentine loop capillary tube, and is welded and fixed on the heat absorption coating thin plate. The first heat pipe capillary tube is connected to the solar collector heat pipe condensation tube section to form a closed loop.

[0017] Furthermore, the second heat pipe capillary of the evaporation section of the compressor waste heat recovery heat pipe is wound around the heating area of ​​the compressor body, and the second heat pipe capillary is connected to the condensation section of the heat recovery heat pipe to form a closed loop.

[0018] Furthermore, the heat pipe condensing section is located higher than the heat pipe solar collector evaporating section and the compressor waste heat recovery heat pipe evaporating section.

[0019] Furthermore, the diameters of the first heat pipe capillary and the second heat pipe capillary are 4-6 mm.

[0020] The beneficial effects of adopting the above technical solution are:

[0021] The utility model adopts oscillating heat pipe technology and utilizes external heat sources such as solar energy and recovered compressor waste heat to reheat the refrigerant return gas, which is equivalent to expanding the capacity of the gas-liquid separator. Before the refrigerant returns to the compressor, the external heat source is used to increase the return gas superheat, which is equivalent to increasing the capacity of the gas-liquid separator and the gas-liquid separation ability, ensuring that the mixed "liquid droplets" that are not evaporated by the refrigerator gas can evaporate for a second time, thereby improving the reliability of the gas-liquid separator and reducing the risk and probability of "liquid hammer".

[0022] The utility model improves the refrigerant return air superheat, increases the refrigerant mass flow rate, and improves the air conditioning cooling and heating capacity. In particular, it absorbs solar heat and recovers compressor waste heat in winter, increases the air conditioning heating capacity in winter, reduces the power consumption of the compressor, improves the air conditioning energy efficiency, reduces the compression ratio, and extends the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the oscillating heat pipe heat exchanger assembly of the utility model;

[0024] Figure 2 This is a schematic diagram of the heat exchange medium flow direction of the oscillating heat pipe heat exchanger assembly of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the evaporation section assembly of the oscillating heat pipe solar collector of the utility model;

[0026] Figure 4 This is a schematic diagram of the sectional structure of the DD of the utility model;

[0027] Figure 5 This is a schematic diagram of the installation position structure of the evaporation section assembly of the oscillating heat pipe solar collector of the utility model;

[0028] Figure 6 This is a side view of the structure of the installation position of the evaporation section assembly of the oscillating heat pipe solar collector of the utility model;

[0029] 1. Oscillating heat pipe heat exchanger assembly, 101. First heat pipe capillary, 102. Oscillating heat pipe solar collector evaporation section assembly, 103. Collector outer frame, 104. Collector transparent cover, A. Heat pipe solar collector evaporation section, B. Compressor waste heat recovery heat pipe evaporation section, C. Heat pipe condensation section, C-1 solar collector heat pipe condensation section, C-2 heat recovery heat pipe condensation section, C-3 refrigerant return air heat exchanger thickening section; 105. Heat absorbing coating thin plate, 106. Collector insulation layer, 2. Air conditioner outdoor unit sheet metal, 201. Compressor body heating area, 202. Refrigerant system return air pipe, 203. Gas-liquid separator, 204. Second heat pipe capillary. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] As attached Figure 1-6 As shown, this embodiment provides a gas-liquid separation enhancement and expansion device for a household air-conditioning compressor, which includes a closed-loop oscillating heat pipe heat exchanger assembly 1; the oscillating heat pipe heat exchanger assembly 1 includes a heat pipe solar collector evaporation section A, a compressor waste heat recovery heat pipe evaporation section B and a heat pipe condensation section C; the heat pipe condensation section C is essentially composed of a thickened part of the compressor gas-liquid separator return pipe, and the refrigerant gas flows back to the gas-liquid separator 203 inlet through the refrigerant return pipe section. The oscillating heat pipe technology is adopted, and the refrigerant return gas is reheated twice by using external heat sources such as solar energy and recovery of compressor waste heat, which is equivalent to expanding the capacity of the gas-liquid separator, ensuring that the mixed "liquid droplets" that are not evaporated by the refrigerator gas can evaporate twice, improving the reliability of the gas-liquid separator, reducing the risk and probability of "liquid hammer", and increasing the refrigerant return gas superheat, increasing the refrigerant mass flow rate, and improving the air conditioning refrigeration and heating capacity, especially absorbing solar energy and recovering compressor waste heat in winter, increasing the air conditioning heating capacity in winter, reducing the power consumption of the compressor, improving the air conditioning energy efficiency, reducing the compression ratio, and extending the service life of the compressor.

[0032] The heat pipe condensation section C includes a refrigerant return air heat exchanger thickened section C-3, in which a solar collector heat pipe condensation section C-1 and a heat recovery heat pipe condensation section C-2 are arranged; the solar collector heat pipe condensation section C-1 is connected to the heat pipe solar collector evaporation section A; the refrigerant return air thickened section C-3 has a slightly thicker diameter than the refrigerant return air pipe 202, so that two heat pipe condensation sections (refrigerant return air sections) composed of heat pipe capillaries 101 are arranged in the refrigerant return air section C-3 - the solar collector heat pipe condensation section C-1 and the heat recovery heat pipe condensation section C-2; the heat pipe condensation section is composed of two sets of independent condensing pipes, which are sealed and welded through the refrigerant return air thickened section C-3. The refrigerant return pipe 202 is connected to the inlet of the compressor gas-liquid separator 203 to achieve heat exchange between the two working fluids. Before the refrigerant returns to the compressor, an external heat source is used to increase the return gas superheat, which is equivalent to increasing the gas-liquid separator capacity and gas-liquid separation ability, and reducing the risk of return gas "liquid hammer".

[0033] The heat recovery heat pipe condensing pipe section C-2 is connected to the compressor waste heat recovery heat pipe evaporating pipe section B; the solar collector heat pipe condensing pipe section C-1 and the heat recovery heat pipe condensing pipe section C-2 are connected in parallel and independent of each other; the refrigerant return air heat exchanger thickened section C-3 is connected to the inlet of the gas-liquid separator 203 through the refrigerant system return air pipe 202, and the oscillating heat pipe heat exchanger assembly 1 is 2 sets of independent closed serpentine loop capillary tubes (the diameter of the small diameter capillary tube is generally about 5mm). After vacuuming, a certain amount of room temperature working medium (such as water, ethanol, acetone, carbon fluorine hydrogen refrigerants, etc.) is filled in the tube. These room temperature heat exchange media form gaseous / liquid plug flows under the action of capillary surface tension and the hot and cold end thermal pressure temperature difference, and appear randomly in the serpentine loop, and heat transfer is achieved through phase change (evaporation and condensation) and gaseous / liquid oscillation.

[0034] The solar collector heat pipe condensing pipe section C-1 and the heat recovery heat pipe condensing pipe section C-2 are both arranged in the refrigerant return air heat exchanger thickened section C-3, and their shapes are both spiral, parallel and independent of each other to facilitate enhanced heat exchange.

[0035] The heat pipe solar collector evaporation section is arranged in the oscillating heat pipe solar collector evaporation section assembly 102, and the oscillating heat pipe solar collector evaporation section assembly 102 is attached to the sunny side of the air conditioner outer unit sheet metal part 2; the oscillating heat pipe solar collector evaporation section assembly 102 is composed of a collector outer frame 103, a collector transparent cover plate 104, a heat pipe solar collector evaporation section A, a heat absorption coating sheet 105, and a collector insulation layer 106 from the outside to the inside; the collector transparent cover plate 104 is covered in the collector outer frame 103, and the size is adapted to be appropriate. The heat pipe solar collector evaporation section A and the collector insulation layer 106 laid on the bottom of the collector outer frame 103 are arranged in the interior of the collector outer frame 103. The shape of the collector outer frame 103 can be rectangular, the shape and size of the collector transparent cover 104 match the collector outer frame 103, and the collector insulation layer 106 is also attached to the four frames of the collector outer frame 103. The evaporation section A of the heat pipe solar collector is formed by bending the first heat pipe capillary 101 to form a serpentine loop capillary, and is welded and fixed on the heat absorption coating sheet 105. The welding method can be ultrasonic or laser spot welding. The first heat pipe capillary 101 is connected with the solar collector heat pipe condensing pipe section C-1 to form a closed loop; the second heat pipe capillary 204 of the compressor waste heat recovery heat pipe evaporating section B is wrapped around the compressor body heating area 201, and the second heat pipe capillary 204 is connected with the heat recovery heat pipe condensing pipe section C-2 to form a closed loop; the heat pipe capillary 101 constituting the cold and hot ends of the oscillating heat pipe heat exchanger assembly 1 is repeatedly bent, integrating sensible heat transfer, phase change heat transfer, and expansion work to form a vapor-liquid two-phase flow system heat exchanger.

[0036] The heat pipe condensation section C is located higher than the heat pipe solar collector evaporation section A and the compressor waste heat recovery heat pipe evaporation section B. It adopts the oscillating heat pipe heat exchanger technology, uses the natural energy of the solar collector and the excess waste heat of the compressor body as the heat source of the evaporation section - the dual evaporation heat source is used as an external heat source to increase the refrigerant return air superheat, and the two sets of independent capillary heat pipe heat exchanger condensation sections are merged in the same condensation section. The two sets of heat sources share the same heat sink condensation section. The two sets of oscillating heat pipe heat exchangers are both independent and interrelated, which improves the operating stability and reliability of the heat pipe heat exchanger and has high cost performance. Especially in winter, the natural solar heat source and the recycling of the compressor body waste heat increase the refrigerant return air superheat to prevent liquid hammer. At the same time, the heating condition greatly increases the air conditioning heating capacity, reduces the compression ratio, and extends the service life of the compressor, which is cost-effective.

[0037] Here’s how it works:

[0038] The utility model mainly utilizes external heat sources - solar energy natural heat source and compressor waste heat recovery heat source to expand the capacity of the gas-liquid separator, strengthen the gas-liquid separation effect, and reduce the risk probability of "liquid shock". Specifically, the oscillating heat pipe solar collector evaporation section assembly 102 is externally mounted on the sunny side of the air conditioner outdoor unit sheet metal part 2, and the sunlight is irradiated through the transparent cover plate 104 to the heat absorption coating thin plate 105. Under the action of greenhouse effect of the collector assembly composed of 106, the temperature of the heat-absorbing coating sheet 105 rises, and the heat is transferred to the evaporation section A of the heat pipe solar collector. The heat exchange medium in the oscillating heat pipe absorbs heat and evaporates the liquid column, and part of the liquid absorbs heat and changes into gas. The capacity of the heat transfer gaseous medium increases. Under the action of the capillary force of the liquid and the expansion force of the gas, the liquid column is pushed to move upward spontaneously toward the high-position heat pipe condensation section (refrigerant return pipe section) C (the oscillating heat pipe condenser is slightly higher than the evaporator). Inside the pipe section C, the refrigerant return air and the high-temperature condensation pipe section C-1 realize heat exchange. In order to prevent the "liquid hammer" of the return gas refrigerant, the return gas superheat is maintained at 3--5℃, and the refrigerant return gas temperature is generally between 5--20℃; the internal condensation temperature of the condenser C-1 inside the heat pipe condensation section (refrigerant return gas pipe section) C is much higher than the refrigerant return gas temperature, and the heat pipe condenser transfers the heat to the return gas refrigerant. After the return gas refrigerant absorbs the heat, the liquid droplets that are not completely evaporated in the return gas will be completely evaporated and returned to the gas-liquid separator, which is equivalent to expanding the capacity and function of the gas-liquid separator, and secondary overheating reduces the risk of "liquid hammer" from the source; at the same time, the refrigerant return gas superheat is increased, and the expansion valve automatically adjusts (increases in most working conditions) the refrigerant flow rate, thereby improving the air conditioning efficiency, especially under winter heating conditions, when the external heat source increases the heating capacity, reduces the power consumption of the air conditioner, and improves the heating efficiency. At the same time, the heat exchange medium after cooling down in the heat pipe condenser flows back to the high-temperature condenser section C-1 to absorb heat and evaporate again under the combined action of gravity (the oscillating heat pipe condenser is slightly higher than the evaporator), liquid column contraction force, evaporator gas expansion force and liquid capillary force. This cycle completes the transfer of solar heat to heat the "liquid droplets" entrained by the return gas refrigerant, allowing it to completely evaporate under the support of external heat sources. This is equivalent to expanding the capacity of the gas-liquid separator and the gas-liquid separation capacity from the source, reducing the risk of "liquid hammer" in the compressor, improving efficiency, reducing compression ratio, reducing energy consumption, and having high cost performance.

[0039] A capillary oscillating heat pipe is used to recover the waste heat source in the heating area of ​​the compressor. The heat pipe capillary 101 is wound around the outer shell of the heating area 201 of the compressor body to form the evaporation section B of the compressor waste heat recovery heat pipe to realize the heat absorption and evaporation of the liquid column in the capillary and the heat release and condensation in the condenser C-1. Its working principle is the same as the heat exchange process and mechanism of the above-mentioned oscillating heat pipe solar collector as the heat source, except that the external heat sources are different - one comes from solar energy and the other comes from recycling the waste heat of the compressor.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor, characterized in that: It includes a closed-loop oscillating heat pipe heat exchanger assembly (1); The oscillating heat pipe heat exchanger assembly (1) comprises a heat pipe solar collector evaporator section, a compressor waste heat recovery heat pipe evaporator section and a heat pipe condenser section; The heat pipe condensation section includes a thickened section of a refrigerant return air heat exchanger, in which a solar collector heat pipe condensation section and a heat recovery heat pipe condensation section are arranged; The solar collector heat pipe condensing pipe section is connected to the heat pipe solar collector evaporating section; The heat recovery heat pipe condensing pipe section is connected to the compressor waste heat recovery heat pipe evaporating pipe section; The solar collector heat pipe condensing pipe section and the heat recovery heat pipe condensing pipe section are connected in parallel and are independent of each other; The thickened section of the refrigerant return air heat exchanger is connected to the inlet of the gas-liquid separator (203) through the refrigerant system return air pipe (202).

2. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The solar collector heat pipe condensing pipe section and the heat recovery heat pipe condensing pipe section are in a spiral shape.

3. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The heat pipe solar collector evaporator section is arranged in an oscillating heat pipe solar collector evaporator section assembly (102), and the oscillating heat pipe solar collector evaporator section assembly (102) comprises, from outside to inside, a collector outer frame (103), a collector transparent cover plate (104), a heat pipe solar collector evaporator section, a heat absorption coating thin plate (105), and a collector insulation layer (106); The heat collector transparent cover plate (104) covers the inside of the heat collector outer frame (103); The interior of the collector outer frame (103) is provided with a heat pipe solar collector evaporation section and a collector insulation layer (106) laid on the bottom of the collector outer frame (103).

4. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The heat pipe solar collector evaporation section is formed by bending a first heat pipe capillary tube (101) to form a serpentine loop capillary tube, and is welded and fixed on a heat absorbing coating thin plate (105); the first heat pipe capillary tube (101) is connected to a heat pipe condensation tube section of the solar collector to form a closed loop.

5. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The second heat pipe capillary (204) of the evaporation section of the compressor waste heat recovery heat pipe is wound around the heating area (201) of the compressor body, and the second heat pipe capillary (204) is connected to the condensation section of the heat recovery heat pipe to form a closed loop.

6. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The heat pipe condensation section is located higher than the heat pipe solar collector evaporation section and the compressor waste heat recovery heat pipe evaporation section.

7. A gas-liquid separation enhancement and expansion device for a household air-conditioning compressor according to claim 1, characterized in that: The diameters of the first heat pipe capillary tube (101) and the second heat pipe capillary tube (204) are 4 to 6 mm.

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