Compressor, air conditioning system and control method

Abstract

The application provides a compressor, an air conditioning system and a control method, the compressor comprising a compressor body and an enthalpy-increasing component arranged on the compressor body; the compressor body is provided with a suction port and a supplementary air port, and the suction port is provided with a suction pipe; the outlet of the enthalpy-increasing component is connected with the supplementary air port, the enthalpy-increasing component is provided with a pressure relief pipeline, one end of the pressure relief pipeline is connected with the inlet of the enthalpy-increasing component, the other end of the pressure relief pipeline is connected with the suction pipe, and the air pressure in the pressure relief pipeline is greater than the air pressure in the suction pipe. By arranging the pressure relief pipeline, when the enthalpy-increasing component stops supplying air to the compressor body, the pressure between the enthalpy-increasing component and the suction pipe is balanced, so that the problems of the air supply valve moving and the impact abnormal sound caused by the pressure imbalance are prevented.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioning systems, and particularly relates to a compressor, an air conditioning system and a control method. BACKGROUND

[0002] The rolling rotor type compressor has the advantages of small volume, simple structure and low cost, and is widely used in the fields of household air conditioners, commercial air conditioners, low-temperature heat pumps and the like. In the related art, for an air conditioning system capable of realizing low-temperature and ultra-low-temperature heating, a middle-pressure jet enthalpy-increasing channel is usually arranged on a rotor compressor pump body, and middle-pressure refrigerant between discharge pressure and suction pressure is injected in the compression process, so as to obtain more heating capacity or refrigerating capacity in low-temperature heating (or high-temperature refrigeration). For the current back valve type jet enthalpy-increasing compressor, the air injection valve is opened or closed under the action of the pressure difference between the introduced pressure and the pressure inside the compression chamber, so as to realize whether the compressor sprays or not. The structure of the enthalpy-increasing compressor is prone to abnormal noise of valve impact at the initial stage of the off-enthalpy-increasing state in the running process.

[0003] Through research, by arranging a pressure sensor on the air injection inlet section of the enthalpy-increasing component, and further combining pressure pulsation experimental data, it is found that the pressure inside the air injection valve enthalpy-increasing component is actually greater than the suction pressure of the compressor after the enthalpy-increasing component stops increasing the enthalpy of the compressor, which causes the air injection valve to move and cannot be stably closed, resulting in abnormal noise of valve impact and air backflow, which reduces the suction amount and reduces the performance of the compressor. SUMMARY

[0004] The application provides a compressor, an air conditioning system and a control method, which can solve the technical problem that the pressure inside the enthalpy-increasing component is actually greater than the suction pressure of the compressor, which causes the air injection valve to move and cannot be stably closed.

[0005] The application provides a compressor, which comprises a compressor body and an enthalpy-increasing component arranged on the compressor body.

[0006] The compressor body has a suction port and an air injection port, and the suction port is provided with a suction pipe.

[0007] The outlet of the enthalpy-increasing component is connected with the air injection port, the enthalpy-increasing component is provided with a pressure relief pipeline, one end of the pressure relief pipeline is connected with the inlet of the enthalpy-increasing component, and the other end of the pressure relief pipeline is connected with the suction pipe. The air pressure in the pressure relief pipeline is greater than the air pressure in the suction pipe.

[0008] In some embodiments, a first electromagnetic valve is arranged on the pressure relief pipeline.

[0009] In some embodiments, the enthalpy-increasing component comprises a cylinder body and a partition plate, the partition plate separates an inner cavity of the cylinder body into a first chamber and a second chamber, the first chamber is in communication with an inlet of the enthalpy-increasing component, the second chamber is in communication with an outlet of the enthalpy-increasing component, a communication hole is arranged on the partition plate, and the communication hole is used to communicate the first chamber and the second chamber.

[0010] In some embodiments, the enthalpy-increasing component further comprises a cannula, the cannula is installed in the communication hole, the cannula is vertically arranged, a top end of the cannula is in communication with the first chamber, a bottom end of the cannula is in communication with the second chamber, the inlet of the enthalpy-increasing component is in communication with the first chamber, and the outlet of the enthalpy-increasing component is in communication with the second chamber.

[0011] An air conditioning system comprises a compressor, a first heat exchanger, a second heat exchanger, and a supplementary air pipeline, the compressor is the compressor described above, the compressor, the first heat exchanger, and the second heat exchanger are connected in sequence, one end of the supplementary air pipeline is connected with an outlet of the first heat exchanger, the other end of the supplementary air pipeline is connected with an inlet of the enthalpy-increasing component, and a second electromagnetic valve is arranged on the supplementary air pipeline.

[0012] In some embodiments, the second heat exchanger has a first flow path and a second flow path which are isolated from each other, a pipeline between the first heat exchanger and the second heat exchanger is connected with the first flow path, the supplementary air pipeline comprises a first pipe section and a second pipe section, one end of the first pipe section is connected with the first heat exchanger, the other end of the first pipe section is connected with an inlet of the second flow path, one end of the second pipe section is connected with an outlet of the second flow path, and the other end of the second pipe section is connected with the inlet of the enthalpy-increasing component.

[0013] In some embodiments, the second electromagnetic valve is arranged on the first pipe section, and a first throttling device is further arranged on the first pipe section, the first throttling device is arranged between the second electromagnetic valve and the second heat exchanger.

[0014] In some embodiments, the air conditioning system further comprises a third heat exchanger and a distributor, the distributor is arranged on the compressor body, an outlet of the distributor is connected with a suction port of the compressor, one end of a suction pipeline is connected with an inlet of the distributor, the other end of the suction pipeline is connected with an outlet of the third heat exchanger, and an inlet of the third heat exchanger is connected with an outlet of the first flow path.

[0015] In some embodiments, a second throttling device is arranged between the third heat exchanger and the second heat exchanger.

[0016] A control method for controlling the air conditioning system, when the first electromagnetic valve is arranged on the pressure relief pipeline, the control method comprises:

[0017] The air conditioning system has a first working condition and a second working condition, and a compression ratio of the first working condition is less than a compression ratio of the second working condition;

[0018] When the air conditioning system operates the first working condition, the second electromagnetic valve is closed, the air supplement pipeline is disconnected with the inlet of the enthalpy increasing component; the first electromagnetic valve is opened, the pressure relief pipeline is communicated with the suction pipe, and the refrigerant in the enthalpy increasing component flows out of the enthalpy increasing component through the pressure relief pipeline;

[0019] When the air conditioning system operates the second working condition, the first electromagnetic valve is closed, the pressure relief pipeline is disconnected with the suction pipe; the second electromagnetic valve is opened, the air supplement pipeline is connected with the inlet of the enthalpy increasing component, and the enthalpy increasing component supplements air to the compressor body.

[0020] The compressor, the air conditioning system and the control method have the following beneficial effects:

[0021] The compressor, the air conditioning system and the control method have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0023] Figure 1 It is a schematic diagram of the compressor of the embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the enthalpy increasing component of the embodiment of the present application;

[0025] Figure 3 It is a schematic diagram of the compressor body of the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the pump body assembly of the embodiment of the present application;

[0027] Figure 5 is an enlarged view of K in the figure when the enthalpy is increased;

[0028] Figure 6 is an enlarged view of K in the figure when the enthalpy is increased;

[0029] Figure 7 is a schematic view of the compressor body provided with two enthalpy increasing components in an embodiment of the present application;

[0030] Figure 8 is a schematic view of the connection of two enthalpy increasing components in an embodiment of the present application;

[0031] Figure 9 is a comparative view of the transmission loss of the enthalpy increasing component in an embodiment of the present application;

[0032] Figure 10 is a schematic view of the air conditioning system in an embodiment of the present application;

[0033] FIG. 1 is a compressor body; 101 is a suction port; 102 is a charge port; 103 is a suction pipe; 104 is a pump body assembly; 141 is a first cylinder; 142 is a second cylinder; 143 is a roller; 144 is a valve port; 145 is a middle partition plate; 146 is a pressure introduction passage; 147 is a charge valve; 148 is an enthalpy increasing port; 2 is an enthalpy increasing component; 201 is a cylinder; 202 is a partition plate; 221 is a first chamber; 222 is a second chamber; 223 is a communication hole; 224 is a spout; 3 is a pressure relief pipeline; 4 is a first heat exchanger; 5 is a second heat exchanger; 501 is a first flow path; 502 is a second flow path; 6 is a charge pipeline; 7 is a second electromagnetic valve; 8 is a first throttling device; 9 is a third heat exchanger; 10 is a distributor; 11 is a second throttling device; 12 is a first electromagnetic valve. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the description of the application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0036] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways, and the spatial relative description used herein is interpreted accordingly.

[0037] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the application.

[0038] For reference Figures 1 to 3 As shown, according to the embodiment of the application, a compressor is provided, which comprises a compressor body 1 and an enthalpy increasing component 2 arranged on the compressor body 1; the compressor body 1 has a suction port 101 and a supplementary air port 102, the suction port 101 is provided with a suction pipe 103; the outlet of the enthalpy increasing component 2 is connected with the supplementary air port 102, the enthalpy increasing component 2 is provided with a pressure relief pipeline 3, one end of the pressure relief pipeline 3 is connected with the inlet of the enthalpy increasing component 2, the other end of the pressure relief pipeline 3 is connected with the suction pipe 103, and the air pressure in the pressure relief pipeline 3 is greater than the air pressure in the suction pipe 103.

[0039] Specifically, when the enthalpy increasing component 2 stops supplementing the compressor body 1 with air, the refrigerant in the enthalpy increasing component 2 no longer flows into the air supplementing port 102, but accumulates in the enthalpy increasing component 2. Since the refrigerant sprayed into the compressor body 1 by the enthalpy increasing component 2 is medium-pressure refrigerant between the discharge pressure and the suction pressure of the compressor body 1, the pressure in the enthalpy increasing component 2 is actually greater than the suction pressure of the compressor body 1 at this time. After the pressure relief pipeline 3 is connected to the suction pipe 103, the air pressure in the suction pipe 103 is less than the refrigerant in the pressure relief pipeline 3, and the medium-pressure refrigerant in the enthalpy increasing component 2 flows into the suction pipe 103 with lower air pressure. As the refrigerant in the enthalpy increasing component 2 gradually flows into the suction pipe 103, the air pressure in the enthalpy increasing component 2 gradually decreases until the air pressure in the enthalpy increasing component 2 is balanced with the air pressure in the suction pipe 103, indicating that the air pressure on the side of the air supplementing valve 147 close to the enthalpy increasing component 2 has been reduced, thereby preventing the air supplementing valve 147 from moving.

[0040] In the present embodiment, by providing the pressure relief pipeline 3, when the enthalpy increasing component 2 stops supplementing the compressor body 1 with air, the medium-pressure refrigerant in the enthalpy increasing component 2 can flow into the suction pipe 103 with lower air pressure. As the refrigerant flows in, the air pressure in the enthalpy increasing component 2 gradually decreases until it is balanced with the air pressure in the suction pipe 103. By balancing the pressure between the enthalpy increasing component 2 and the suction pipe 103, the movement and impact noise problem of the air supplementing valve 147 caused by pressure imbalance, as well as the increase in compression power consumption and poor energy efficiency, are prevented.

[0041] It is worth noting that the present embodiment illustrates that the refrigerant in the enthalpy increasing component 2 is medium-pressure refrigerant. In other embodiments, the refrigerant can also be refrigerant with other pressure values. When the refrigerant pressure in the enthalpy increasing component 2 is greater than the refrigerant pressure in the suction pipe 103, the pressure relief pipeline 3 can relieve pressure.

[0042] For reference Figures 1 to 3 As shown in FIG. 1, the pressure relief pipeline 3 is provided with a first electromagnetic valve 12.

[0043] Specifically, when the enthalpy increasing component 2 needs to spray medium-pressure refrigerant into the compressor body 1, the first electromagnetic valve 12 is closed, and the refrigerant in the enthalpy increasing component 2 no longer flows into the suction pipe 103. When the enthalpy increasing component 2 stops supplementing the compressor body 1 with air, the refrigerant in the enthalpy increasing component 2 no longer flows into the air supplementing port 102, and the first electromagnetic valve 12 is opened. At this time, the pressure in the enthalpy increasing component 2 is actually greater than the suction pressure of the compressor body 1. After the pressure relief pipeline 3 is connected to the suction pipe 103, the air pressure in the suction pipe 103 is less than the refrigerant in the pressure relief pipeline 3, and the medium-pressure refrigerant in the enthalpy increasing component 2 flows into the suction pipe 103 with lower air pressure.

[0044] In this embodiment, the first electromagnetic valve 12 can automatically open or close the pressure relief pipeline 3 according to the control signal, thereby controlling the pressure relief process to balance the pressure between the enthalpy increasing component 2 and the suction pipe 103, prevent the surge of the air supplement valve 147 and the impact noise, protect the normal operation and performance of the compressor, and accurately adjust the time and speed of pressure relief to adapt to different working conditions and requirements. Moreover, through the control of the electromagnetic valve, the system can automatically relieve pressure when the system pressure exceeds the safety threshold, thereby improving the safety and reliability of the system. Based on the setting of the pressure relief pipeline 3, the electromagnetic valve can flexibly open or close the pressure relief pipeline 3 according to the actual working condition of the system to adapt to different working pressures and environmental conditions, thereby improving the adaptability and flexibility of the system.

[0045] With reference to Figures 1 to 3 As shown in the figure, the enthalpy increasing component 2 includes a cylinder body 201 and a partition plate 202, the partition plate 202 divides the inner cavity of the cylinder body 201 into a first chamber 221 and a second chamber 222, the first chamber 221 communicates with the inlet of the enthalpy increasing component 2, the second chamber 222 communicates with the outlet of the enthalpy increasing component 2, and the partition plate 202 is provided with a communication hole 223 for connecting the first chamber 221 and the second chamber 222.

[0046] Specifically, when the enthalpy increasing component 2 sprays medium-pressure refrigerant into the compressor body 1, the inlet of the enthalpy increasing component 2 is connected to the medium-pressure refrigerant, the refrigerant flows from the first chamber 221 to the second chamber 222 through the communication hole 223, and then flows out from the outlet of the enthalpy increasing component 2 and into the air supplement port 102; when the enthalpy increasing component 2 stops increasing the enthalpy, the medium-pressure refrigerant in the first chamber 221 and the second chamber 222 is discharged from the enthalpy increasing component 2 due to the higher pressure in the enthalpy increasing component 2 than the pressure in the suction pipe 103, until the pressure in the enthalpy increasing component 2 gradually balances with the pressure in the suction pipe 103.

[0047] In the embodiment, the working principle of the enthalpy-increasing component 2 is the same as that of the distributor 10, the partition plate 202 separates the inner cavity of the cylinder body 201 into a first chamber 221 and a second chamber 222, which helps the separation of the gas-liquid two-phase refrigerant, and through the arrangement of the partition plate 202, the gas-liquid separation of the gas-liquid two-phase refrigerant can be realized under the action of gravity after entering the enthalpy-increasing component 2, thereby improving the efficiency and performance of the system. The communication hole 223 is used to communicate the first chamber 221 and the second chamber 222, which can ensure the pressure balance between the two chambers and better exhaust effect, and through the communication hole 223, the gas-phase refrigerant and the liquid-phase refrigerant can be discharged from the enthalpy-increasing component 2 in time according to their movement law, avoiding the liquid-phase refrigerant from flowing into the compressor body 1 from the outlet of the enthalpy-increasing component 2, and reducing the occurrence of compressor liquid knock phenomenon. In addition, when the enthalpy-increasing component 2 sprays the medium-pressure refrigerant into the compressor body 1, the refrigerant flows from the first chamber 221 to the second chamber 222 through the communication hole 223, and then flows out from the outlet of the enthalpy-increasing component 2 and flows into the air supplementing port 102, which controls the flow path of the refrigerant and makes the refrigerant flow orderly from the inlet to the outlet of the enthalpy-increasing component 2, thereby improving the efficiency of the system.

[0048] For reference Figures 1 to 3 , Figure 9 As shown in FIGS. 1 to 3, the enthalpy-increasing component 2 further comprises a spout pipe 224, which is installed in the communication hole 223 and is vertically arranged, the top end of the spout pipe 224 communicates with the first chamber 221, and the bottom end of the spout pipe 224 communicates with the second chamber 222, the inlet of the enthalpy-increasing component 2 communicates with the first chamber 221, and the outlet of the enthalpy-increasing component 2 communicates with the second chamber 222.

[0049] Specifically, when the enthalpy-increasing component 2 sprays the medium-pressure refrigerant into the compressor body 1, the inlet of the enthalpy-increasing component 2 is supplied with the medium-pressure refrigerant, and due to the continuous inflow of the refrigerant, the refrigerant in the first chamber 221 flows into the spout pipe 224, then flows into the second chamber 222 along the spout pipe 224, and then flows out from the outlet of the enthalpy-increasing component 2 and flows into the air supplementing port 102; when the enthalpy-increasing component 2 stops increasing the enthalpy, the refrigerant in the second chamber 222 flows into the first chamber 221 from the spout pipe 224 due to the fact that the gas pressure in the enthalpy-increasing component 2 is greater than the gas pressure in the suction pipe 103, the medium-pressure refrigerant in the first chamber 221 is discharged from the enthalpy-increasing component 2, and the gas pressure in the enthalpy-increasing component 2 gradually balances with the gas pressure in the suction pipe 103.

[0050] In the embodiment, in one aspect, the partition plate 202 separates the inner cavity of the enthalpy increasing component 2 into a first chamber 221 and a second chamber 222, and forms a secondary mutation of the airflow cross section through the insertion pipe 224, so that the transmitted sound energy is greatly attenuated by the multiple sound reflection of the airflow, thereby enhancing the sound attenuation effect and the noise reduction. In another aspect, the insertion pipe 224 is vertically arranged, the top end of which is communicated with the first chamber 221, and the bottom end of which is communicated with the second chamber 222. Such design enables the medium pressure refrigerant to flow smoothly from the inlet of the enthalpy increasing component 2 into the first chamber 221, flow into the second chamber 222 through the insertion pipe 224, and then flow out from the outlet of the enthalpy increasing component 2 into the air supplement port 102. The insertion pipe 224 can accurately control the flow path of the refrigerant in the enthalpy increasing component 2, and ensure that the refrigerant flows in the predetermined order and direction, thereby improving the efficiency and control accuracy of the system. The insertion pipe 224 can increase the disturbance of the fluid flow, which can cause the fluid to mix in the radial direction. The insertion pipe 224 as a spoiler element can cause the refrigerant to produce rotational flow or vortex. When the enthalpy increasing component 2 stops increasing the enthalpy, the refrigerant in the second chamber 222 flows into the first chamber 221 through the insertion pipe 224, which helps to balance and adjust the pressure, reduces the impact noise and gas backflow problem of the air supplement valve 147, and effectively improves the transmission loss and improves the compressor noise.

[0051] Referring to Figure 1 and Figure 9 , an air conditioning system is shown, which comprises a compressor, a first heat exchanger 4, a second heat exchanger 5 and an air supplement pipeline 6. The compressor is the compressor described above. The compressor, the first heat exchanger 4 and the second heat exchanger 5 are connected in sequence. One end of the air supplement pipeline 6 is connected with the outlet of the first heat exchanger 4, and the other end of the air supplement pipeline 6 is connected with the inlet of the enthalpy increasing component 2. The second electromagnetic valve 7 is arranged on the air supplement pipeline 6.

[0052] Specifically, the refrigerant compressed by the compressor flows into the first heat exchanger 4. The refrigerant after heat exchange in the first heat exchanger 4 is divided into two paths, one of which flows into the second heat exchanger 5, and the other of which flows into the air supplement pipeline 6. When the enthalpy increasing component 2 needs to inject refrigerant into the compressor body 1, the second electromagnetic valve 7 is opened, the refrigerant in the air supplement pipeline 6 flows into the enthalpy increasing component 2, and the enthalpy increasing component 2 injects refrigerant into the air supplement port 102. At this time, the first electromagnetic valve 12 is closed, that is, the refrigerant in the pressure relief pipeline 3 does not flow into the suction pipe 103. When the enthalpy increasing component 2 stops increasing the enthalpy, the second electromagnetic valve 7 is closed, that is, the refrigerant in the first heat exchanger 4 does not flow into the air supplement pipeline 6. The medium pressure refrigerant is stored in the enthalpy increasing component 2. The first electromagnetic valve 12 is opened, the refrigerant in the enthalpy increasing component 2 flows into the pressure relief pipeline 3, and the refrigerant in the pressure relief pipeline 3 flows into the suction pipe 103, until the pressure in the enthalpy increasing component 2 is balanced with the pressure in the suction pipe 103.

[0053] In the embodiment, the second electromagnetic valve 7 can accurately supply refrigerant to the supercharging component 2. When the compressor body 1 needs to be injected with refrigerant, the second electromagnetic valve 7 is opened, so that the refrigerant in the air supplement pipeline 6 flows into the supercharging component 2, and the air injection supercharging is realized. The compressed refrigerant is divided into two paths, one of which flows into the second heat exchanger 5, and the other of which flows into the air supplement pipeline 6. This arrangement can optimize the distribution of refrigerant and improve the energy efficiency and performance of the system. By arranging the first electromagnetic valve 12 and the second electromagnetic valve 7, the system pressure can be automatically released when it exceeds the safety threshold through the control of the electromagnetic valve, preventing equipment damage or accidents caused by overpressure, thereby improving the safety and reliability of the system, and realizing air supplement to the compressor body 1 when the supercharging component 2 needs to supplement air to the compressor body 1.

[0054] For reference Figure 1 and Figure 9 As shown in FIGS. 1 and 2, the second heat exchanger 5 has a first flow path 501 and a second flow path 502 isolated from each other. The pipeline between the first heat exchanger 4 and the second heat exchanger 5 is connected to the first flow path 501. The air supplement pipeline 6 includes a first pipe section and a second pipe section. One end of the first pipe section is connected to the first heat exchanger 4, and the other end of the first pipe section is connected to the inlet of the second flow path 502. One end of the second pipe section is connected to the outlet of the second flow path 502, and the other end of the second pipe section is connected to the inlet of the supercharging component 2.

[0055] In the embodiment, the pipeline between the first heat exchanger 4 and the second heat exchanger 5 is connected to the first flow path 501, and the air supplement pipeline 6 includes a first pipe section and a second pipe section. Such a design can accurately control the path of refrigerant flowing from the first heat exchanger 4 to the second heat exchanger 5 and then to the supercharging component 2. In some cases, such an arrangement allows the refrigerant to effectively exchange heat between the two heat exchangers, improving the heat exchange efficiency of the system. By reasonably distributing the proportion of refrigerant flowing through the first flow path 501 and the second flow path 502, the heat exchange effect can be optimized, and the energy efficiency ratio of the air conditioning system can be improved.

[0056] As a specific implementation, the first heat exchanger 4 is a condenser, the second heat exchanger 5 is a plate heat exchanger, and the third heat exchanger 9 is an evaporator.

[0057] For reference Figure 1 and Figure 9 As shown in FIGS. 1 and 2, the second electromagnetic valve 7 is arranged on the first pipe section, and a first throttling device 8 is also arranged on the first pipe section. The first throttling device 8 is arranged between the second electromagnetic valve 7 and the second heat exchanger 5.

[0058] In the embodiment, the first throttling device 8 is arranged between the second electromagnetic valve 7 and the second heat exchanger 5, which can throttle and depressurize the high-pressure liquid refrigerant flowing out of the first heat exchanger 4, so that the refrigerant in the air supplement pipeline 6 is in a gas-liquid two-phase state.

[0059] Referring to Figure 1 and Figure 9 As shown in the figure, the air conditioning system further comprises a third heat exchanger 9 and a liquid separator 10, the liquid separator 10 is arranged on the compressor body 1, the outlet of the liquid separator 10 is connected with the suction port 101 of the compressor, one end of the suction pipe 103 is connected with the inlet of the liquid separator 10, and the other end of the suction pipe 103 is connected with the outlet of the third heat exchanger 9, and the inlet of the third heat exchanger 9 is connected with the outlet of the first flow path 501.

[0060] In the embodiment, the liquid separator 10 is arranged on the compressor body 1, which mainly separates the liquid drops in the low-pressure and low-temperature steam from the evaporator, prevents the liquid refrigerant from entering the cylinder of the compressor, thereby avoiding the liquid strike phenomenon and protecting the compressor. At the same time, the liquid separator 10 also has the functions of filtering, returning oil, and storing liquid, etc. The outlet of the liquid separator 10 is connected with the suction port 101 of the compressor, one end of the suction pipe 103 is connected with the inlet of the liquid separator 10, and the other end is connected with the outlet of the third heat exchanger 9. Such a design helps to optimize the suction pipe 103 and reduce the liquid refrigerant after gas-liquid separation before being sent into the compressor.

[0061] Referring to Figure 7 and Figure 8 As a specific embodiment, the compressor body 1 of the embodiment is provided with two cylinders, and the cylinder body of the compressor is provided with two suction ports 101, and the liquid separator 10 is provided with two gas outlet pipes. The enthalpy increasing component 2 is arranged beside the liquid separator 10, and the enthalpy increasing component 2 can also play the role of gas-liquid separation.

[0062] As a specific embodiment, the embodiment is provided with two enthalpy increasing components 2 connected in series, which can further improve the air supplementing effect and the liquid separation effect.

[0063] Referring to Figure 1 and Figure 9 As shown in the figure, the second throttling device 11 is arranged between the third heat exchanger 9 and the second heat exchanger 5.

[0064] In the embodiment, the second throttling device 11 can further throttle and depressurize the high-pressure liquid refrigerant flowing out of the second heat exchanger 5, so as to ensure that there is a necessary pressure difference between the third heat exchanger 9 and the evaporator, so that the refrigerant can evaporate at a lower pressure and a corresponding low temperature inside the evaporator, thereby absorbing the heat of the cooled object to achieve the refrigeration effect.

[0065] Referring to Figures 4 to 6As shown, as a specific embodiment, the compressor is a rolling rotor type compressor, the compressor body 1 includes a pump body assembly 104, the pump body assembly 104 includes a first cylinder 141 and a second cylinder 142, and a roller 143 is arranged in each of the two cylinders, the two cylinders are separated by a partition plate 145, the partition plate 145 is provided with a pressure introduction channel 146, and the first cylinder 141 and the second cylinder 142 are respectively provided with valve ports 144, the valve ports 144 are respectively provided with air supplement valves 147, and the air supplement valves 147 are provided with enthalpy increasing ports 148 away from the pressure introduction channel 146. When the medium pressure refrigerant flows into the pressure introduction channel 146, the air supplement valve 147 is opened, the valve port 144 is opened, and the pressure introduction channel 146 is communicated with the enthalpy increasing port 148; when the valve port 144 is closed, the pressure introduction channel 146 is not communicated with the enthalpy increasing port 148. If the refrigerant pressure in the enthalpy increasing component 2 is greater than the suction pressure, the medium pressure refrigerant is still stored in the pressure introduction channel 146, the valve plate will still be opened, the pressure relief pipeline 3 is opened and connected with the suction pipe 103, and as the refrigerant pressure in the enthalpy increasing component 2 gradually decreases, the gas pressure in the pressure introduction channel 146 also gradually decreases, thereby avoiding the valve plate from moving. The embodiment is used to improve the noise, performance and reliability problems caused by the valve plate moving and closing not in time when the "check valve type" jet enthalpy increasing compressor increases the enthalpy; the low pressure or pressure relief is introduced at the inlet of the compressor enthalpy increasing component 2 to balance the residual high pressure refrigerant in the enthalpy increasing component 2.

[0066] For reference Figure 1 and Figure 9 As shown, a control method is used to control the air conditioning system, when the pressure relief pipeline 3 is provided with the first electromagnetic valve 12, the control method comprises:

[0067] The air conditioning system has a first working condition and a second working condition, and the compression ratio of the first working condition is less than that of the second working condition;

[0068] When the air conditioning system operates in the first working condition, the second electromagnetic valve 7 is closed, the air supplement pipeline 6 is disconnected with the inlet of the enthalpy increasing component 2; the first electromagnetic valve 12 is opened, the pressure relief pipeline 3 is communicated with the suction pipe 103, and the refrigerant in the enthalpy increasing component 2 flows out of the enthalpy increasing component 2 through the pressure relief pipeline 3;

[0069] When the air conditioning system operates in the second working condition, the first electromagnetic valve 12 is closed, the pressure relief pipeline 3 is disconnected with the suction pipe 103; the second electromagnetic valve 7 is opened, the air supplement pipeline 6 is connected with the inlet of the enthalpy increasing component 2, and the enthalpy increasing component 2 supplements air to the compressor body 1.

[0070] Specifically, when the air conditioning system runs the first working condition, the compression ratio of the compressor body 1, i.e. the pressure ratio of the suction port 101 and the discharge port, is < 2, the second electromagnetic valve 7 is closed, i.e. the refrigerant in the first heat exchanger 4 does not flow into the air supplement pipeline 6, the medium pressure refrigerant is stored in the enthalpy increasing component 2, the first electromagnetic valve 12 is opened, the refrigerant in the enthalpy increasing component 2 flows into the pressure relief pipeline 3, the refrigerant in the pressure relief pipeline 3 flows into the suction pipeline 103 again, until the pressure in the enthalpy increasing component 2 is balanced with the pressure in the suction pipeline 103; when the air conditioning system runs the first working condition, the compression ratio of the compressor body 1, i.e. the pressure ratio of the suction port 101 and the discharge port, is > 2, the second electromagnetic valve 7 is opened, the refrigerant in the air supplement pipeline 6 flows into the enthalpy increasing component 2, the enthalpy increasing component 2 sprays the refrigerant into the air supplement port 102, and the first electromagnetic valve 12 is closed at this time, i.e. the refrigerant in the pressure relief pipeline does not flow into the suction pipeline 103.

[0071] It is worth mentioning that in the embodiment, the opening of the first electromagnetic valve 12 and the closing of the second electromagnetic valve 7, and the closing of the first electromagnetic valve 12 and the opening of the second electromagnetic valve 7 are performed simultaneously, so that the valve plate can be prevented from moving or the refrigerant in the enthalpy increasing component from leaking to the maximum extent.

[0072] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0073] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A compressor characterized by, Comprise: A compressor body (1) and an enthalpy increasing component (2) arranged on the compressor body (1); The compressor body (1) has a suction port (101) and a supplementary air port (102), and the suction port (101) is provided with a suction pipe (103); The outlet of the enthalpy increasing component (2) is connected with the supplementary air port (102), the enthalpy increasing component (2) is provided with a pressure relief pipeline (3), one end of the pressure relief pipeline (3) is connected with the inlet of the enthalpy increasing component (2), the other end of the pressure relief pipeline (3) is connected with the suction pipe (103), and the air pressure in the pressure relief pipeline (3) is greater than the air pressure in the suction pipe (103); The enthalpy increasing component (2) comprises a cylinder body (201) and a partition plate (202), the partition plate (202) divides the inner cavity of the cylinder body (201) into a first chamber (221) and a second chamber (222), the first chamber (221) is communicated with the inlet of the enthalpy increasing component (2), the second chamber (222) is communicated with the outlet of the enthalpy increasing component (2), and a communication hole (223) is arranged on the partition plate (202) and used for communicating the first chamber (221) and the second chamber (222); The enthalpy increasing component (2) further comprises a cannula (224), the cannula (224) is installed in the communication hole (223), the cannula (224) is vertically arranged, the top end of the cannula (224) is communicated with the first chamber (221), the bottom end of the cannula (224) is communicated with the second chamber (222), the inlet of the enthalpy increasing component (2) is communicated with the first chamber (221), and the outlet of the enthalpy increasing component (2) is communicated with the second chamber (222).

2. The compressor of claim 1, wherein, A first electromagnetic valve (12) is arranged on the pressure relief pipeline (3). 3.An air conditioning system comprising a compressor, a first heat exchanger (4), a second heat exchanger (5) and a supplementary air pipeline (6), wherein the compressor is the compressor as claimed in claim 1 or 2, the compressor, the first heat exchanger (4) and the second heat exchanger (5) are sequentially connected, one end of the supplementary air pipeline (6) is connected with the outlet of the first heat exchanger (4), the other end of the supplementary air pipeline (6) is connected with the inlet of the enthalpy increasing component (2), and a second electromagnetic valve (7) is arranged on the supplementary air pipeline (6).

4. The air conditioning system of claim 3, wherein, The second heat exchanger (5) has a first flow path (501) and a second flow path (502) which are isolated from each other, the pipeline between the first heat exchanger (4) and the second heat exchanger (5) is connected with the first flow path (501), the supplementary air pipeline (6) comprises a first pipe section and a second pipe section, one end of the first pipe section is connected with the first heat exchanger (4), the other end of the first pipe section is connected with the inlet of the second flow path (502), one end of the second pipe section is connected with the outlet of the second flow path (502), and the other end of the second pipe section is connected with the inlet of the enthalpy increasing component (2).

5. The air conditioning system of claim 4, wherein, The second electromagnetic valve (7) is arranged on the first pipe section, and a first throttling device (8) is further arranged on the first pipe section, and the first throttling device (8) is arranged between the second electromagnetic valve (7) and the second heat exchanger (5).

6. The air conditioning system of claim 5, wherein, The air conditioning system further comprises a third heat exchanger (9) and a distributor (10), the distributor (10) is arranged on the compressor body (1), an outlet of the distributor (10) is connected with a suction port (101) of the compressor, one end of a suction pipe (103) is connected with an inlet of the distributor (10), and the other end of the suction pipe (103) is connected with an outlet of the third heat exchanger (9), and an inlet of the third heat exchanger (9) is connected with an outlet of the first flow path (501).

7. The air conditioning system of claim 6, wherein, A second throttling device (11) is arranged between the third heat exchanger (9) and the second heat exchanger (5).

8. A control method characterized by, The control method is used for controlling the air conditioning system in any one of claims 3 to 7, when the first electromagnetic valve (12) is arranged on the pressure relief pipeline (3), the control method comprises: The air conditioning system has a first working condition and a second working condition, and a compression ratio of the first working condition is smaller than a compression ratio of the second working condition; When the air conditioning system operates in the first working condition, the second electromagnetic valve (7) is closed, the air supplement pipeline (6) is disconnected with the inlet of the enthalpy increasing component (2), the first electromagnetic valve (12) is opened, the pressure relief pipeline (3) is communicated with the suction pipe (103), and the refrigerant in the enthalpy increasing component (2) flows out of the enthalpy increasing component (2) through the pressure relief pipeline (3); When the air conditioning system operates in the second working condition, the first electromagnetic valve (12) is closed, the pressure relief pipeline (3) is disconnected with the suction pipe (103), the second electromagnetic valve (7) is opened, the air supplement pipeline (6) is connected with the inlet of the enthalpy increasing component (2), and the enthalpy increasing component (2) supplements air to the compressor body (1).

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