Heating and ventilation equipment

Abstract

The invention discloses heating and ventilation equipment. The heating and ventilation equipment comprises an outdoor unit and an indoor unit. The outdoor unit comprises a liquid pipeline and a gas pipeline; the indoor unit comprises an indoor unit, a load liquid pipe and a load gas pipe, the load liquid pipe communicates with the indoor unit and the liquid pipeline, and the load gas pipe communicates with the indoor unit and the gas pipeline; wherein at least parts of the liquid pipeline, the gas pipeline, the load liquid pipe and the load gas pipe are steel pipes. According to the technical scheme, the cost of the heating and ventilation equipment can be reduced.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning (HVAC) technology, and particularly to an HVAC device. Background Art

[0002] HVAC devices include components such as heat exchangers, compressors, expansion valves, etc. These components are connected through pipes so that the heat transfer medium can flow within the HVAC device. In related technologies, all pipes in HVAC devices are made of copper tubes. However, due to the difficult processing and high cost of copper materials, the overall cost of the device is high. Summary of the Invention

[0003] Embodiments of this application provide an HVAC device that can reduce the cost of the HVAC device.

[0004] The HVAC device proposed in the embodiments of this application includes:

[0005] An outdoor unit, including a liquid pipeline and a gas pipeline; and

[0006] An indoor unit, including an indoor machine, a load liquid pipe, and a load gas pipe. The load liquid pipe connects the indoor machine to the liquid pipeline, and the load gas pipe connects the indoor machine to the gas pipeline;

[0007] Wherein, at least part of the liquid pipeline, the gas pipeline, the load liquid pipe, and the load gas pipe is made of steel pipes.

[0008] In the embodiments of this application, at least part of the liquid pipeline and the gas pipeline of the outdoor unit, as well as the load liquid pipe and the load gas pipe in the indoor unit that are respectively connected to the liquid pipeline and the gas pipeline, are made of steel pipes. Compared with the technical solution in related technologies where the refrigerant pipes of the indoor unit and the outdoor unit are made of copper tubes, using steel pipes not only has a lower material cost but also is simpler to process, which is beneficial to improving production efficiency. In addition, steel pipes also have better anti-corrosion performance than copper pipes, thereby reducing or avoiding refrigerant leakage and effectively improving the reliability of the HVAC device.

[0009] In one embodiment, the steel pipe includes a stainless steel pipe to reduce costs, avoid pipeline rust, and improve pipeline reliability.

[0010] In one embodiment, the outdoor unit further includes:

[0011] A compressor, having a suction port and a discharge port; one end of the liquid pipeline is connected to the discharge port, and the other end is provided with a liquid-side stop valve for controlling the on-off of the liquid path between the liquid pipeline and the load liquid pipe; one end of the gas pipeline is connected to the suction port, and the other end is provided with a gas-side stop valve for controlling the on-off of the gas path between the gas pipeline and the load gas pipe;

[0012] At least part of the liquid pipeline and at least part of the gas pipeline are steel pipes.

[0013] In the embodiment of the present application, at least part of the liquid pipeline and the gas pipeline connected to the compressor adopt steel pipes. Compared with the technical solution that all copper pipes are used in the related art, using steel pipes not only has lower material costs, but also is simpler to process, which is beneficial to improving production efficiency. In addition, steel pipes also have better anti-corrosion performance than copper pipes, thereby effectively improving the reliability of the outdoor unit.

[0014] In one embodiment, the outdoor unit further includes:

[0015] A four-way valve, both the liquid pipeline and the gas pipeline are connected to the four-way valve and are configured to achieve flow splitting through the four-way valve;

[0016] Wherein, the four-way valve is a steel component to reduce costs.

[0017] In one embodiment, an outdoor heat exchanger is further included. The liquid pipeline includes a first liquid pipe and a second liquid pipe. The first liquid pipe is connected to the exhaust port and the outdoor heat exchanger, and the second liquid pipe is connected to the outdoor heat exchanger and the liquid-side stop valve, so that the heat exchange working medium flows from the first liquid pipe through the outdoor heat exchanger to the second liquid pipe;

[0018] Wherein, at least part of at least one of the first liquid pipe and the second liquid pipe is a steel pipe to reduce costs.

[0019] In one embodiment, an oil separator and an oil return pipe are further included. The oil separator has a fluid inlet and a fluid outlet, and the oil return pipe is connected to the internal space of the oil separator and the internal space of the compressor;

[0020] The first liquid pipe includes a first pipe section and a second pipe section. The first pipe section is connected to the exhaust port and the fluid inlet, and the second pipe section is connected to the fluid outlet and the outdoor heat exchanger, so that the heat exchange working medium flows from the first pipe section through the oil separator to the second pipe section;

[0021] Wherein, at least part of at least one of the first pipe section and the second pipe section is a steel pipe to reduce costs.

[0022] In one embodiment, a check valve is provided in the second pipe section to make the second pipe section only conduct unidirectionally from the oil separator to the outdoor heat exchanger, and the check valve is a steel component to reduce costs.

[0023] In one embodiment, a pressure relief pipeline is further included. The pressure relief pipeline includes a pressure relief pipe and a pressure relief valve. One end of the pressure relief pipe communicates with the second pipe segment, and the other end communicates with the gas pipeline. The pressure relief valve is arranged on the pressure relief pipe and is used to control the on-off of the flow path in the pressure relief pipe;

[0024] Wherein, at least part of the pressure relief pipe is a steel pipe to reduce costs.

[0025] In one embodiment, a first expansion valve is further included. The first expansion valve is arranged on the second liquid pipe.

[0026] In one embodiment, a gas-liquid separator is further included. The gas-liquid separator has a gas-liquid inlet and a gas outlet. The gas pipeline includes a first gas pipe and a second gas pipe. The first gas pipe communicates with the gas stop valve and the gas-liquid inlet, and the second gas pipe communicates with the gas outlet and the suction port, so that the heat exchange working medium flows from the first gas pipe through the gas-liquid separator to the second gas pipe;

[0027] Wherein, at least part of at least one of the first gas pipe and the second gas pipe is a steel pipe to reduce costs.

[0028] In one embodiment, an outdoor heat exchanger and a refrigerant heat dissipation pipeline are further included. The outdoor heat exchanger is arranged on the liquid pipeline. The refrigerant heat dissipation pipeline includes:

[0029] A heat dissipation main body is arranged on the liquid pipeline and has a first heat dissipation channel and a second heat dissipation channel. The first heat dissipation channel communicates with the outdoor heat exchanger and the liquid side stop valve through the liquid pipeline;

[0030] A subcooling pipeline communicates with the first heat dissipation channel and the second heat dissipation channel. A second expansion valve is arranged on the subcooling pipeline;

[0031] A heat dissipation pipeline communicates with the second heat dissipation channel and communicates with the gas pipeline and / or the liquid pipeline, so that the heat exchange working medium in the second heat dissipation channel flows to the gas pipeline and / or the liquid pipeline;

[0032] Wherein, at least part of at least one of the subcooling pipeline and the heat dissipation pipeline is a steel pipe to reduce costs.

[0033] In one embodiment, the heat dissipation pipeline includes:

[0034] A heat dissipation connecting pipe communicates with the second heat dissipation channel;

[0035] A first branch pipe, one end of which communicates with the heat dissipation connecting pipe and the other end communicates with the gas pipeline. A first valve body is arranged on the first branch pipe, and the first valve body is used to control the on-off of the flow path in the first branch pipe; and

[0036] A second branch pipe, one end of which is connected to the heat dissipation connecting pipe and the other end is connected to the liquid pipeline. A second valve body is provided on the second branch pipe, and the second valve body is used to control the on / off of the flow path in the second branch pipe;

[0037] Wherein, at least a part of at least one of the heat dissipation connecting pipe, the first branch pipe and the second branch pipe is a steel pipe to reduce costs.

[0038] In one embodiment, a charging pipeline is further included. The charging pipeline includes a charging pipe and a charging valve. The charging pipe is connected to the gas pipeline, and the charging valve is connected to the charging pipe to control the on / off of the flow path in the charging pipe;

[0039] At least a part of the charging pipe is a steel pipe to reduce costs.

[0040] In one embodiment, the indoor unit includes a plurality of the indoor machines. The load liquid pipe includes a liquid header and a plurality of liquid branch pipes. The liquid header is connected to the liquid pipeline, and the plurality of liquid branch pipes are all connected to the liquid header and respectively correspond to and are connected to the plurality of indoor machines; the load gas pipe includes a gas header and a plurality of gas branch pipes. The gas header is connected to the gas pipeline, and the plurality of gas branch pipes are all connected to the gas header and respectively correspond to and are connected to the plurality of indoor machines;

[0041] Wherein, at least a part of the liquid header, the gas header, the liquid branch pipe and the gas branch pipe is a steel pipe to reduce costs, reduce leakage and improve reliability.

[0042] In one embodiment, the liquid header includes:

[0043] A first header section connected to the liquid pipeline;

[0044] A second header section arranged side by side with the first header section, and the plurality of liquid branch pipes are all connected to the second header section; and

[0045] A connecting pipe that crosses the gas header and connects the first header section and the second header section;

[0046] Wherein, at least a part of the first header section, the second header section and the connecting pipe is a steel pipe to reduce costs.

[0047] In one embodiment, a third expansion valve is further included. The third expansion valve is arranged on the liquid branch pipe, and at least a part of the liquid branch pipe is a steel pipe to reduce costs, reduce leakage and improve reliability. Description of the Drawings

[0048] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0049] Figure 1 Schematic diagram of the pipeline structure of an embodiment of the heating, ventilation and air conditioning (HVAC) equipment of the present application;

[0050] Figure 2 Schematic diagram of the pipeline structure of an embodiment of the outdoor unit of the present application.

[0051] Explanation of the reference numerals in the drawings:

[0052] 100, outdoor unit; 10, compressor; 20, liquid pipeline; 21, first liquid pipe; 211, first pipe section; 212, second pipe section; 213, check valve; 22, second liquid pipe; 221, first expansion valve; 23, liquid side stop valve; 30, gas pipeline; 31, first gas pipe; 32, second gas pipe; 33, gas side stop valve; 34, gas-liquid separator; 40, four-way valve; 50, outdoor heat exchanger; 60, oil separator; 61, oil return pipe; 70, pressure relief pipeline; 71, pressure relief pipe; 72, pressure relief valve; 80, refrigerant heat dissipation pipeline; 81, heat dissipation main body; 811, first heat dissipation channel; 812, second heat dissipation channel; 82, subcooling pipeline; 821, second expansion valve; 83, heat dissipation pipeline; 831, heat dissipation connecting pipe; 832, first branch pipe; 833, first valve body; 834, second branch pipe; 835, second valve body; 90, charging pipeline; 91, charging pipe; 92, charging valve; 200, indoor unit; 201, indoor machine; 202, load liquid pipe; 2021, liquid header; 2021a, first header section; 2021b, second header section; 2021c, connecting pipe; 2022, liquid branch pipe; 203, load gas pipe; 2031, gas header; 2032, gas branch pipe; 204, third expansion valve; 1000, HVAC equipment.

[0053] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0054] To make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail in conjunction with the drawings.

[0055] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0056] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0058] One aspect of the embodiments of the present application provides a heating, ventilation, and air conditioning (HVAC) device. The HVAC device is used for heating, ventilation, air conditioning, etc. For example, the HVAC device can be an air conditioner. The HVAC device includes an indoor unit and an outdoor unit. The outdoor unit includes an outdoor heat exchanger, a compressor, and an expansion valve. The indoor unit includes an indoor heat exchanger. Each component between the indoor unit and the outdoor unit is connected by pipes so that the heat exchange medium can circulate within the HVAC device. In the related art, all the pipes of the HVAC device are made of copper tubes. However, due to the difficulty in processing copper materials and the high price, the overall cost of the device is high.

[0059] To solve the above problems, please refer to Figure 1 and Figure 2 , the outdoor unit 100 proposed in the embodiments of the present application includes a compressor 10, a liquid pipeline 20, and a gas pipeline 30. Among them, both the liquid pipeline 20 and the gas pipeline 30 are connected to the compressor 10 and the indoor unit 200 to form a complete loop. Among them, the indoor unit 200 includes an indoor unit 201, a load liquid pipe 202, and a load gas pipe 203. The load liquid pipe 202 connects the indoor unit 201 and the liquid pipeline 20, and the load gas pipe 203 connects the indoor unit 201 and the gas pipeline 30, thereby forming a refrigerant flow path. The liquid and gaseous refrigerants circulate therein to achieve functions such as refrigeration and heating in the indoor unit 201.

[0060] In the embodiments of the present application, at least part of the liquid pipeline 20 and the gas pipeline 30 of the outdoor unit 100, and the load liquid pipe 202 and the load gas pipe 203 in the indoor unit 200 that are respectively connected to the liquid pipeline 20 and the gas pipeline 30 are made of steel pipes. Compared with the technical solution in the related art where the refrigerant pipes of the indoor unit 200 and the outdoor unit are made of copper pipes, using steel pipes not only has a lower material cost, but also is simpler to process, which is beneficial to improving production efficiency. In addition, steel pipes also have better anti-corrosion performance than copper pipes, thereby reducing or avoiding refrigerant leakage and effectively improving the reliability of the heating, ventilation and air conditioning equipment 1000.

[0061] The compressor 10 is used to compress the working medium and has a suction port and a discharge port. One end of the liquid pipeline 20 communicates with the discharge port, and the other end is provided with a liquid-side stop valve 23, and the liquid-side stop valve 23 is used to control the on-off of the liquid path between the liquid pipeline 20 and the load liquid pipe 202. One end of the gas pipeline 30 communicates with the suction port, and the other end is provided with a gas-side stop valve 33, and the gas-side stop valve 33 is used to control the on-off of the gas path between the gas pipeline 30 and the load gas pipe 203. For example, in the operating condition of the air conditioner for refrigeration, the refrigerant circulates as the heat exchange working medium in the loop of the above-mentioned heating, ventilation and air conditioning equipment 1000. The indoor heat exchanger of the indoor unit 200 is an evaporator, and the outdoor heat exchanger 50 of the outdoor unit 100 is a condenser. The outdoor heat exchanger 50 is arranged on the liquid pipeline 20. The compressor 10 sucks in the low-temperature and low-pressure refrigerant vapor generated in the evaporator through the suction port, and outputs the high-temperature and high-pressure gaseous refrigerant at the discharge port through mechanical compression. The high-temperature and high-pressure gaseous refrigerant exchanges heat with the outdoor air in the condenser and condenses into a normal-temperature and high-pressure liquid refrigerant. The liquid refrigerant passes through the throttling element to become a low-temperature and low-pressure gas-liquid mixture. After the low-temperature and low-pressure gas-liquid mixture enters the evaporator, the liquid refrigerant rapidly evaporates under low-pressure conditions, absorbs the heat in the air and becomes a gaseous refrigerant. In this way, the circulation of the heat exchange working medium in the loop of the above-mentioned heating, ventilation and air conditioning equipment 1000 is completed.

[0062] In the embodiments of the present application, at least part of the liquid pipeline 20 and the gas pipeline 30 are made of steel pipes. Thus, at least part of the liquid pipeline 20 and the gas pipeline 30 connected to the compressor 10 are made of steel pipes. Compared with the technical solution in the related art where all are made of copper pipes, using steel pipes not only has a lower material cost, but also is simpler to process, which is beneficial to improving production efficiency.

[0063] In addition, steel pipes also have better anti-corrosion performance than copper pipes, thereby effectively improving the reliability of the outdoor unit 100.

[0064] In some embodiments, the steel pipe includes a stainless steel pipe. Compared with copper pipes, stainless steel pipes have lower material costs. At least part of the liquid pipeline 20 and the gas pipeline 30 being made of stainless steel pipes is conducive to overall reducing the cost of the HVAC equipment 1000, and using stainless steel pipes can also effectively avoid pipeline rust and improve the pipeline reliability of the HVAC equipment 1000. Of course, the steel pipe can also be made of carbon steel, and an anti-rust coating treatment can be optionally applied to the outer surface of the steel pipe. The embodiments of the present application do not make specific limitations in this regard.

[0065] Please continue to refer to Figure 2 , in some embodiments of the present application, the outdoor unit 100 further includes a four-way valve 40. Both the liquid pipeline 20 and the gas pipeline 30 are connected to the four-way valve 40 and are configured to achieve flow splitting through the four-way valve 40. The four-way valve 40 can change the flow direction of the heat exchange working medium to achieve switching of functions such as refrigeration, heating, or defrosting of the HVAC equipment 1000. In the embodiments of the present application, the four-way valve 40 is a steel part, further reducing the material cost.

[0066] The outdoor unit 100 further includes an outdoor heat exchanger 50 and a first expansion valve 221. The liquid pipeline 20 includes two parts, a first liquid pipe 21 and a second liquid pipe 22. The first liquid pipe 21 is connected to the exhaust port and the outdoor heat exchanger 50, and the second liquid pipe 22 is connected to the outdoor heat exchanger 50 and the liquid-side stop valve 23, so that the heat exchange working medium flows from the first liquid pipe 21 through the outdoor heat exchanger 50 to the second liquid pipe 22. Optionally, in the refrigeration condition of the HVAC equipment 1000, the high-temperature and high-pressure refrigerant (heat exchange working medium) entering the first liquid pipe 21 from the exhaust port exchanges heat with the outdoor air through the outdoor heat exchanger 50 and condenses into a normal-temperature and high-pressure liquid refrigerant. The first expansion valve 221 is on the second liquid pipe 22. The liquid refrigerant becomes a low-temperature and low-pressure gas-liquid mixture after passing through the first expansion valve 221, and the low-temperature and low-pressure gas-liquid mixture flows into the indoor unit 200 for heat exchange when the liquid-side stop valve 23 is opened. In some embodiments of the present application, at least part of at least one of the first liquid pipe 21 and the second liquid pipe 22 is a steel pipe. That is to say, the first liquid pipe 21 of the outdoor unit 100 is a steel pipe, and the second liquid pipe 22 is a pipe of other materials, such as a copper pipe; or it can be that the second liquid pipe 22 of the outdoor unit 100 is a steel pipe, and the first liquid pipe 21 is a pipe of other materials, such as a copper pipe to reduce costs; of course, it can also be that both the first liquid pipe 21 and the second liquid pipe 22 are made of steel pipes. In this way, compared with the technical solution in the related art where both the first liquid pipe 21 and the second liquid pipe 22 are made of copper pipes, the material cost of the liquid pipeline 20 in the embodiments of the present application is lower.

[0067] Specifically combined with Figure 2, in one embodiment, the outdoor unit 100 further includes an oil separator 60 and an oil return pipe 61. During the operation of the compressor 10, lubricating oil is required to lubricate the internal components of the compressor 10, thereby improving the service life and reliability of the compressor 10. To reduce or avoid the lubricating oil from entering the liquid pipeline 20 and the gas pipeline 30 along with the heat exchange refrigerant and affecting the working effect and structural reliability of the HVAC equipment 1000, the oil separator 60 is connected between the compressor 10 and the outdoor heat exchanger 50 to separate the oil contained in the heat exchange refrigerant.

[0068] Specifically, the oil separator 60 has a fluid inlet and a fluid outlet. The first liquid pipe 21 includes a first pipe section 211 and a second pipe section 212. The first pipe section 211 communicates with the exhaust port and the fluid inlet, and the second pipe section 212 communicates with the fluid outlet and the outdoor heat exchanger 50, so that the heat exchange refrigerant flows from the first pipe section 211 through the oil separator 60 to the second pipe section 212. In some exemplary structural forms, the oil separator 60 includes a cylinder body, an intake pipe, and a lead-out pipe. Both the intake pipe and the lead-out pipe are connected to the cylinder body. The intake pipe is provided with a fluid inlet for introducing the heat exchange refrigerant into the cylinder body. The heat exchange refrigerant performs an operation of separating oil droplets in the cylinder body. The lead-out pipe is provided with a fluid outlet for leading out the heat exchange refrigerant after separating the oil droplets to the second pipe section 212. The oil return pipe 61 communicates the internal space of the oil separator 60 and the internal space of the compressor 10, and is used for leading out the oil droplets separated from the refrigerant from the oil separator 60 and returning the oil droplets to the compressor 10, so as to recycle the oil, improve the utilization efficiency of the oil, save materials, and further reduce costs.

[0069] In the embodiment of the present application, at least a part of at least one of the first pipe section 211 and the second pipe section 212 is a steel pipe. That is to say, the first pipe section 211 is a steel pipe, and the second pipe section 212 is a pipe of other materials, such as a copper pipe; or it can be that the second pipe section 212 is a steel pipe, and the first pipe section 211 is a pipe of other materials, such as a copper pipe to reduce costs; of course, it can also be that both the first pipe section 211 and the second pipe section 212 are made of steel pipes. Of course, the first pipe section 211 and the second pipe section 212 can also be spliced by a steel pipe and a pipe of other materials, such as a part of the first pipe section 211 is steel and the other part is copper. In this way, by making at least a part of at least one of the first pipe section 211 and the second pipe section 212 a steel pipe, the material cost can be reduced and the sealing performance can be improved.

[0070] Further, the second pipe section 212 is provided with a check valve 213. The check valve 213 enables the second pipe section 212 to be unidirectionally conductive only from the oil separator 60 to the outdoor heat exchanger 50, avoiding the reflux of the heat exchange refrigerant. Among them, the check valve 213 is also a steel part, so that the cost can be further reduced.

[0071] Refer to Figure 2, in an optional embodiment, the outdoor unit 100 further includes a pressure relief pipeline 70. The pressure relief pipeline 70 includes a pressure relief pipe 71 and a pressure relief valve 72. One end of the pressure relief pipe 71 communicates with the second pipe segment 212, and the other end communicates with the gas pipeline 30. The pressure relief valve 72 is provided on the pressure relief pipe 71 and is used to control the on-off of the flow path in the pressure relief pipe 71. When the pressure relief valve 72 is opened, the second pipeline is communicated with the gas pipeline 30. Since the gas pressure in the gas pipeline 30 is relatively small, the second pipe segment 212 can be depressurized. In this embodiment, at least part of the pressure relief pipe 71 is a steel pipe. That is to say, the pressure relief pipe 71 can be entirely made of a steel pipe, or can be formed by splicing a steel pipe with pipes of other materials. Compared with the pressure relief pipe 71 made entirely of copper pipes, the pressure relief pipe 71 in this embodiment has a lower cost.

[0072] In one embodiment, the outdoor unit 100 further includes a gas-liquid separator 34. The gas-liquid separator 34 is disposed between the compressor 10 and the gas stop valve, and specifically can be disposed between the four-way valve 40 and the compressor 10. Specifically, the gas-liquid separator 34 has a gas-liquid inlet and a gas outlet. The gas pipeline 30 includes a first gas pipe 31 and a second gas pipe 32. The first gas pipe 31 communicates the gas stop valve with the gas-liquid inlet, and the second gas pipe 32 communicates the gas outlet with the suction port, so that the heat exchange working medium flows from the first gas pipe 31 through the gas-liquid separator 34 to the second gas pipe 32. It can be understood that the gas-liquid separator 34 is used to separate the water vapor in the heat exchange working medium to reduce the liquid content of the heat exchange working medium entering the compressor 10 and improve the energy efficiency of the compressor 10. In this embodiment, at least part of at least one of the first gas pipe 31 and the second gas pipe 32 is a steel pipe. That is to say, the first gas pipe 31 is a steel pipe and the second gas pipe 32 is a pipe of other materials, such as a copper pipe; or it can be that the second gas pipe 32 is a steel pipe and the first gas pipe 31 is a pipe of other materials, such as a copper pipe, to reduce the cost; of course, it can also be that both the first gas pipe 31 and the second gas pipe 32 are made of steel pipes. Of course, the first gas pipe 31 and the second gas pipe 32 can also be formed by splicing a steel pipe with pipes of other materials. For example, a part of the first gas pipe 31 is made of steel and the other part is made of copper. In this way, by making at least part of at least one of the first gas pipe 31 and the second gas pipe 32 a steel pipe, the material cost can be reduced and the sealing performance can be improved.

[0073] Please refer to again Figure 2, in some embodiments, the outdoor unit 100 further includes a refrigerant heat dissipation pipeline 80. The refrigerant heat dissipation pipeline 80 is used to increase the subcooling degree of the heat exchange working medium flowing from the liquid pipeline 20 to the indoor unit 200, thereby improving the energy efficiency ratio of the HVAC equipment 1000. Specifically, the refrigerant heat dissipation pipeline 80 includes a heat dissipation main body 81, a subcooling pipeline 82, and a heat dissipation pipeline 83. The heat dissipation main body 81 is arranged on the liquid pipeline 20 and has a first heat dissipation channel 811 and a second heat dissipation channel 812. Optionally, the heat dissipation main body 81 can be a plate heat exchanger, which has the advantages of high-efficiency heat exchange, flexibility, easy cleaning and maintenance, and corrosion resistance. The first heat dissipation channel 811 is connected to the outdoor heat exchanger 50 and the liquid-side stop valve 23 through the liquid pipeline 20. The subcooling pipeline 82 connects the first heat dissipation channel 811 and the second heat dissipation channel 812, and a second expansion valve 821 is provided on the subcooling pipeline 82. The second expansion valve 821 is used to cool the heat exchange working medium entering the subcooling pipeline 82. The heat dissipation pipeline 83 is connected to the second heat dissipation channel 812 and is connected to the gas pipeline 30 and / or the liquid pipeline 20, so that the heat exchange working medium in the second heat dissipation channel 812 flows to the gas pipeline 30 and / or the liquid pipeline 20, thereby improving the efficiency of the entire HVAC equipment 1000.

[0074] In this embodiment, at least a part of at least one of the subcooling pipeline 82 and the heat dissipation pipeline 83 is a steel pipe. That is to say, the subcooling pipeline 82 is a steel pipe, and the heat dissipation pipeline 83 is a pipe of other materials, such as a copper pipe; or it can be that the heat dissipation pipeline 83 is a steel pipe, and the subcooling pipeline 82 is a pipe of other materials, such as a copper pipe to reduce costs; of course, it can also be that both the subcooling pipeline 82 and the heat dissipation pipeline 83 are made of steel pipes. Of course, the subcooling pipeline 82 and the heat dissipation pipeline 83 can also be spliced by steel pipes and pipes of other materials. For example, a part of the subcooling pipeline 82 is made of steel, and the other part is made of copper. In this way, by making at least a part of at least one of the subcooling pipeline 82 and the heat dissipation pipeline 83 a steel pipe, the material cost can be reduced and the sealing performance can be improved.

[0075] Optionally, the heat dissipation pipeline 83 includes a heat dissipation connecting pipe 2021c831, a first branch pipe 832, and a second branch pipe 834. The heat dissipation connecting pipe 2021c831 communicates with the second heat dissipation channel 812 and is used to transport the heat-exchanged working medium after heat dissipation. One end of the first branch pipe 832 communicates with the heat dissipation connecting pipe 2021c831, and the other end communicates with the gas pipeline 30. A first valve body 833 is provided on the first branch pipe 832, and the first valve body 833 is used to control the on-off of the flow path in the first branch pipe 832. One end of the second branch pipe 834 communicates with the heat dissipation connecting pipe 2021c831, and the other end communicates with the liquid pipeline 20. A second valve body 835 is provided on the second branch pipe 834, and the second valve body 835 is used to control the on-off of the flow path in the second branch pipe 834. Wherein, the first valve body 833 and the second valve body 835 are one-way valves 213 to respectively realize the one-way conduction between the heat dissipation connecting pipe 2021c831 and the gas pipeline 30, and the one-way conduction between the heat dissipation connecting pipe 2021c831 and the liquid pipeline 20. Exemplarily, the first branch pipe 832 is connected to the second gas pipe 32 and is located upstream of the gas-liquid separator 34 to ensure the high energy efficiency of the compressor 10. The second branch pipe 834 is connected to the compressor 10, and the compressor 10 is further provided with an intermediate pressure suction hole, and the second branch pipe 834 communicates with this intermediate pressure suction hole. When the second valve body 835 is opened, the medium-pressure gaseous heat-exchanged working medium flows from the heat dissipation connecting pipe 2021c831 through the second branch pipe 834 into the compressor 10, and is mixed with the partially compressed heat-exchanged working medium and then compressed, improving the efficiency and energy efficiency of the compressor 10. Wherein, in this embodiment, at least a part of at least one of the heat dissipation connecting pipe 2021c831, the first branch pipe 832, and the second branch pipe 834 is a steel pipe to reduce costs.

[0076] Combined with Figure 2 , in one embodiment, the outdoor unit 100 further includes a charging pipeline 90 for charging the heat-exchanged working medium into the gas pipeline 30 and the liquid pipeline 20. The charging pipeline 90 includes a charging pipe 91 and a charging valve 92. The charging pipe 91 communicates with the gas pipeline 30, and the pressure of the gas pipeline 30 is relatively small, which is convenient for injection. The charging valve 92 is connected to the charging pipe 91 to control the on-off of the flow path in the charging pipe 91. Wherein, all or part of the charging pipe 91 is made of a steel pipe to reduce costs.

[0077] Combined with Figure 1, in some embodiments, the indoor unit 200 includes a plurality of indoor machines 201. The load liquid pipe 202 includes a liquid header 2021 and a plurality of liquid branch pipes 2022. The liquid header 2021 is connected to the liquid pipeline. The plurality of liquid branch pipes 2022 are all connected to the liquid header 2021, and the plurality of liquid branch pipes 2022 are respectively connected to and communicate with the plurality of indoor machines 201. The load gas pipe 203 includes a gas header 2031 and a plurality of gas branch pipes 2032. The gas header 2031 is connected to the gas pipeline. The plurality of gas branch pipes 2032 are all connected to the gas header 2031, and the plurality of gas branch pipes 2032 are respectively connected to and communicate with the plurality of indoor machines 201. In this way, the outdoor unit establishes a refrigerant cycle with the plurality of indoor machines 201. The plurality of indoor machines 201 can be arranged in a plurality of different indoor spaces or can be placed in the same indoor space, improving the working range and working efficiency of the HVAC equipment 1000.

[0078] Among them, at least part of the liquid header 2021, the gas header 2031, the liquid branch pipes 2022, and the gas branch pipes 2032 is a steel pipe. That is, one or several of the liquid header 2021, the gas header 2031, the liquid branch pipes 2022, and the gas branch pipes 2032 are steel pipes, and part or all of any one of the liquid header 2021, the gas header 2031, the liquid branch pipes 2022, and the gas branch pipes 2032 is a steel pipe. By using steel pipes, the manufacturing cost of the indoor unit 200 can be reduced, the risk of refrigerant leakage can be reduced, and the reliability of the indoor unit 200 can be improved.

[0079] In one embodiment, for the convenience of pipeline layout, the liquid header 2021 includes a first header section 2021a, a second header section 2021b, and a connecting pipe 2021c. The first header section 2021a and the second header section 2021b are arranged side by side. The first header section 2021a is connected to the liquid pipeline. The second header section 2021b is spaced from the first header section 2021a. In some structures, the gas header 2031 is located between the second header section 2021b and the first header section 2021a. The plurality of liquid branch pipes 2022 are all connected to the second header section 2021b. The connecting pipe 2021c crosses the gas header 2031 and connects the first header section 2021a and the second header section 2021b. In this embodiment, at least part of the first header section 2021a, the second header section 2021b, and the connecting pipe 2021c is a steel pipe. That is, one or several of the first header section 2021a, the second header section 2021b, and the connecting pipe 2021c are steel pipes, and part or all of any one of the first header section 2021a, the second header section 2021b, and the connecting pipe 2021c is a steel pipe. In this way, the manufacturing cost of the liquid header 2021 can be further reduced, thereby reducing the overall cost of the HVAC equipment 1000 and improving the reliability.

[0080] Such asFigure 1 As shown, in one embodiment, the HVAC equipment 1000 further includes a third expansion valve 204. The third expansion valve 204 is arranged on the liquid branch pipe 2022 and is used to throttle and reduce the pressure of the refrigerant flowing through the liquid branch pipe 2022. At least part of the liquid branch pipe 2022 is made of steel pipe to reduce costs and refrigerant leakage.

[0081] Optionally, the connections between components such as steel parts and steel pipes in the embodiments of the present application are welded. The connections between steel pipes and components of other materials, such as copper parts, are also welded to ensure the connection strength and sealing performance. The solder can be selected as red copper.

[0082] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0083] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A HVAC equipment, characterized in that: include: outdoor unit, including liquid and gas piping; and An indoor unit, comprising an indoor unit, a load liquid pipe and a load gas pipe, wherein the load liquid pipe connects the indoor unit with the liquid pipeline, and the load gas pipe connects the indoor unit with the gas pipeline; Wherein, at least part of the liquid pipeline, the gas pipeline, the load liquid pipe and the load gas pipe are steel pipes.

2. The HVAC equipment according to claim 1, characterized in that: The steel pipe includes a stainless steel pipe.

3. The HVAC equipment according to claim 1, characterized in that: The outdoor unit also includes: The compressor has an air intake port and an air exhaust port; one end of the liquid pipeline is connected to the air exhaust port, and the other end is provided with a liquid side stop valve, and the liquid side stop valve is used to control the liquid circuit between the liquid pipeline and the load liquid pipe; one end of the gas pipeline is connected to the air intake port, and the other end is provided with a gas side stop valve, and the gas side stop valve is used to control the gas circuit between the gas pipeline and the load gas pipe; Wherein, at least a portion of the liquid pipeline and at least a portion of the gas pipeline are steel pipes.

4. The HVAC equipment according to claim 3, characterized in that: Also includes: A four-way valve, wherein the liquid pipeline and the gas pipeline are both connected to the four-way valve and are configured to achieve flow diversion through the four-way valve; Wherein, the four-way valve is a steel part.

5. The HVAC equipment according to claim 3, characterized in that: It also includes an outdoor heat exchanger, the liquid pipeline includes a first liquid pipe and a second liquid pipe, the first liquid pipe is connected to the exhaust port and the outdoor heat exchanger, and the second liquid pipe is connected to the outdoor heat exchanger and the liquid side stop valve, so that the heat exchange medium flows from the first liquid pipe to the second liquid pipe through the outdoor heat exchanger; Wherein, at least a portion of at least one of the first liquid pipe and the second liquid pipe is a steel pipe.

6. The HVAC equipment according to claim 5, characterized in that: It also includes an oil separator and an oil return pipe, wherein the oil separator has a fluid inlet and a fluid outlet, and the oil return pipe communicates the inner space of the oil separator with the inner space of the compressor; The first liquid pipe includes a first pipe section and a second pipe section, the first pipe section is connected to the exhaust port and the fluid inlet, and the second pipe section is connected to the fluid outlet and the outdoor heat exchanger, so that the heat exchange medium flows from the first pipe section to the second pipe section through the oil separator; Wherein, at least a portion of at least one of the first pipe section and the second pipe section is a steel pipe.

7. The HVAC equipment according to claim 6, characterized in that: The second pipe section is provided with a one-way valve so that the second pipe section can only conduct one-way from the oil separator to the outdoor heat exchanger, and the one-way valve is a steel part.

8. The HVAC equipment according to claim 6, characterized in that: It also includes a pressure relief pipeline, the pressure relief pipeline includes a pressure relief pipe and a pressure relief valve, one end of the pressure relief pipe is connected to the second pipe section, and the other end is connected to the gas pipeline, the pressure relief valve is arranged on the pressure relief pipe, and is used to control the on and off of the flow path in the pressure relief pipe; Wherein, at least a part of the pressure relief pipe is a steel pipe.

9. The HVAC equipment according to claim 5, characterized in that: It also includes a first expansion valve, which is arranged on the second liquid pipe.

10. The HVAC equipment according to claim 3, characterized in that: It also includes a gas-liquid separator, the gas-liquid separator has a gas-liquid inlet and a gas outlet, the gas pipeline includes a first gas pipe and a second gas pipe, the first gas pipe is connected to the gas stop valve and the gas-liquid inlet, and the second gas pipe is connected to the gas outlet and the air intake, so that the heat exchange medium flows from the first gas pipe to the second gas pipe through the gas-liquid separator; Wherein, at least a portion of at least one of the first air pipe and the second air pipe is a steel pipe.

11. The HVAC equipment according to claim 3, characterized in that: It also includes an outdoor heat exchanger and a refrigerant heat dissipation pipeline, wherein the outdoor heat exchanger is arranged on the liquid pipeline, and the refrigerant heat dissipation pipeline includes: A heat dissipation body is arranged on the liquid pipeline and has a first heat dissipation channel and a second heat dissipation channel, wherein the first heat dissipation channel is connected to the outdoor heat exchanger and the liquid side stop valve through the liquid pipeline; A subcooling pipeline, the subcooling pipeline is connected to the first heat dissipation channel and the second heat dissipation channel, and a second expansion valve is provided on the subcooling pipeline; a heat dissipation pipeline connected to the second heat dissipation channel and connected to the gas pipeline and / or the liquid pipeline, so that the heat exchange medium in the second heat dissipation channel flows to the gas pipeline and / or the liquid pipeline; Wherein, at least a portion of at least one of the supercooling pipeline and the heat dissipation pipeline is a steel pipe.

12. The HVAC equipment according to claim 11, characterized in that: The heat dissipation pipeline comprises: A heat dissipation connecting pipe connected to the second heat dissipation channel; a first branch pipe, one end of which is connected to the heat dissipation connecting pipe and the other end of which is connected to the gas pipeline, the first branch pipe being provided with a first valve body, the first valve body being used to control the on-off of the flow path in the first branch pipe; and A second branch pipe, one end of which is connected to the heat dissipation connecting pipe, and the other end of which is connected to the liquid pipeline, and a second valve body is provided on the second branch pipe, and the second valve body is used to control the flow path in the second branch pipe; Wherein, at least a portion of at least one of the heat dissipation connecting pipe, the first branch pipe and the second branch pipe is a steel pipe.

13. The HVAC equipment according to claim 1, characterized in that: It also includes a filling pipeline, the filling pipeline includes a filling pipe and a filling valve, the filling pipe is connected to the gas pipeline, and the filling valve is connected to the filling pipe to control the flow path in the filling pipe to be on and off; At least part of the filling pipe is a steel pipe.

14. The HVAC equipment according to any one of claims 1 to 13, characterized in that: The indoor unit includes a plurality of indoor units, the load liquid pipe includes a liquid header and a plurality of liquid branches, the liquid header is connected to the liquid pipeline, the plurality of liquid branches are connected to the liquid header, and the plurality of liquid branches are respectively connected to and connected to the plurality of indoor units; the load gas pipe includes a gas header and a plurality of gas branches, the gas header is connected to the gas pipeline, the plurality of gas branches are connected to the gas header, and the plurality of gas branches are respectively connected to and connected to the plurality of indoor units; Wherein, at least part of the liquid header, the gas header, the liquid branch pipe and the gas branch pipe are steel pipes.

15. The HVAC equipment according to claim 14, characterized in that: The liquid header comprises: A first header section, connected to the liquid pipeline; a second header section, arranged side by side with the first header section, and the plurality of liquid branches are all connected to the second header section; and a connecting pipe, spanning the gas header and connecting the first header section and the second header section; Wherein, at least part of the first header section, the second header section and the connecting pipe are steel pipes.

16. The HVAC equipment according to claim 14, characterized in that: It also includes a third expansion valve, which is arranged on the liquid branch pipe, and at least a part of the liquid branch pipe is a steel pipe.

Images