Compressor, air conditioning system and control method

Abstract

The invention provides a compressor, an air conditioning system and a control method. The compressor comprises a compressor body and an enthalpy increasing component arranged on the compressor body. The compressor body is provided with an air suction port and an air supply port; an outlet of the enthalpy increasing component is connected with the air supply port, the enthalpy increasing component is provided with a pressure relief pipeline, one end of the pressure relief pipeline is connected with an inlet of the enthalpy increasing component, the other end of the pressure relief pipeline is connected with the air suction pipe, and air pressure in the pressure relief pipeline is larger than that in the air suction pipe. By arranging the pressure relief pipeline, when the enthalpy increasing component stops supplying air to the compressor body, the problems of movement and impact abnormal sound caused by unbalanced pressure of the gulp valve are prevented by balancing the pressure between the enthalpy increasing component and the air suction pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of air-conditioning systems, and in particular relates to a compressor, an air-conditioning system and a control method. Background Art

[0002] Rolling rotor compressors have outstanding advantages such as small size, simple structure, and low cost, and are widely used in the fields of household air conditioners, commercial air conditioners, low-temperature heat pumps, etc. In the relevant technology, for air-conditioning systems that can achieve low-temperature and ultra-low-temperature heating, it is often necessary to set a medium-pressure jet reheat channel on the rotor compressor pump body, and inject a medium-pressure refrigerant between the exhaust pressure and the suction pressure during the compression process to obtain more heating or cooling capacity during low-temperature heating (or high-temperature cooling). For the current check valve type jet reheat compressor, the air supply valve is opened or closed by the pressure difference between the introduced pressure and the pressure inside the compression chamber to realize whether the compressor is jet reheat; this structure of the reheat compressor is prone to obvious abnormal sound of valve impact in the initial stage of the closed reheat state during operation.

[0003] After research, by setting a pressure sensor at the air inlet section of the enthalpy increasing component and further combining the pressure pulsation experimental data, it was found that after the enthalpy increasing component stopped adding enthalpy to the compressor, the pressure inside the enthalpy increasing component of the air supply valve was actually greater than the suction pressure of the compressor, which caused the air supply valve to move and could not be closed stably, resulting in abnormal impact noise and gas reflux when closing the enthalpy increasing component, causing the suction volume to decrease and the compressor performance to decline. Summary of the invention

[0004] The present invention provides a compressor, an air conditioning system and a control method, which can solve the technical problem that the pressure in the enthalpy increasing component is actually greater than the suction pressure of the compressor, thereby causing the air supply valve to move and be unable to close stably.

[0005] The present invention provides a compressor, comprising a compressor body and an enthalpy increasing component arranged on the compressor body;

[0006] The compressor body has an air intake port and an air supply port, and the air intake port is provided with an air intake pipe;

[0007] The outlet of the enthalpy increasing component is connected to the air supply port, and the enthalpy increasing component is provided with a pressure relief pipeline. One end of the pressure relief pipeline is connected to the inlet of the enthalpy increasing component, and the other end of the pressure relief pipeline is connected to the intake pipe. The air pressure in the pressure relief pipeline is greater than the air pressure in the intake pipe.

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

[0009] In some embodiments, the enthalpy increasing component includes a cylinder and a partition plate, the partition plate divides the inner cavity of the cylinder into a first chamber and a second chamber, the first chamber is connected to the inlet of the enthalpy increasing component, and the second chamber is connected to the outlet of the enthalpy increasing component, and a connecting hole is provided on the partition plate, and the connecting hole is used to connect the first chamber and the second chamber.

[0010] In some embodiments, the enthalpy increasing component also includes a cannula, which is installed in the connecting hole, the cannula is vertically arranged, the top end of the cannula is connected to the first chamber, the bottom end of the cannula is connected to the second chamber, the inlet of the enthalpy increasing component is connected to the first chamber, and the outlet of the enthalpy increasing component is connected to the second chamber.

[0011] An air conditioning system includes a compressor, a first heat exchanger, a second heat exchanger and an air supply pipeline, wherein the compressor is the above-mentioned compressor, the compressor, the first heat exchanger and the second heat exchanger are connected in sequence, one end of the air supply pipeline is connected to the outlet of the first heat exchanger, and the other end of the air supply pipeline is connected to the inlet of the enthalpy increasing component, and a second solenoid valve is arranged on the air supply pipeline.

[0012] In some embodiments, the second heat exchanger has a first flow path and a second flow path isolated from each other, a pipeline between the first heat exchanger and the second heat exchanger is connected to the first flow path, the air supply pipeline includes a first pipe segment and a second pipe segment, one end of the first pipe segment is connected to the first heat exchanger, the other end of the first pipe segment is connected to the inlet of the second flow path, one end of the second pipe segment is connected to the outlet of the second flow path, and the other end of the second pipe segment is connected to the inlet of the enthalpy increasing component.

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

[0014] In some embodiments, the air-conditioning system also includes a third heat exchanger and a liquid separator, the liquid separator is arranged on the compressor body, the outlet of the liquid separator is connected to the intake port of the compressor, one end of the intake pipe is connected to the inlet of the liquid separator, the other end of the intake pipe is connected to the outlet of the third heat exchanger, and the inlet of the third heat exchanger is connected to the outlet of the first flow path.

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

[0016] A control method is provided for controlling the above-mentioned air conditioning system. When a first solenoid valve is provided on the pressure relief pipeline, the control method comprises:

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

[0018] When the air conditioning system operates in the first working condition, the second solenoid valve is closed, the air supply pipeline is disconnected from the inlet of the enthalpy increasing component; the first solenoid valve is opened, the pressure relief pipeline is connected to the air intake 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 in the second working condition, the first solenoid valve is closed, and the pressure relief pipeline is disconnected from the intake pipe; the second solenoid valve is opened, and the air supply pipeline is connected to the inlet of the enthalpy increasing component, and the enthalpy increasing component supplies air to the compressor body.

[0020] A compressor, an air conditioning system and a control method provided by the present invention have the following beneficial effects:

[0021] The present invention provides a pressure relief pipeline. When the enthalpy increasing component stops supplying air to the compressor body, the medium-pressure refrigerant in the enthalpy increasing component can flow into the intake pipe with lower air pressure. With the inflow of the refrigerant, the air pressure in the enthalpy increasing component gradually decreases until it is balanced with the air pressure in the intake pipe. By balancing the pressure between the enthalpy increasing component and the intake pipe, the problems of movement and abnormal noise of the air supply valve caused by pressure imbalance can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] Figure 1 is a schematic diagram of a compressor according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of an enthalpy increasing component according to an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of a compressor body according to an embodiment of the present invention.

[0026] Figure 4 is a schematic diagram of a pump assembly according to an embodiment of the present invention;

[0027] Figure 5 This is the enlarged view when the enthalpy increases at K in the figure;

[0028] Figure 6 This is the enlarged view when the enthalpy increase is turned off at K in the figure;

[0029] Figure 7 It is a schematic diagram of a compressor body when two enthalpy increasing components are provided in an embodiment of the present invention;

[0030] Figure 8 It is a schematic diagram of two enthalpy increasing components connected in an embodiment of the present invention;

[0031] Fig. 9 A comparison diagram of the transfer loss of the enthalpy increasing components of an embodiment of the present invention;

[0032] Fig.10 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

[0033] Figures: 1- compressor body; 101- air inlet; 102- air supply port; 103- air inlet pipe; 104- pump body assembly; 141- first cylinder; 142- second cylinder; 143- roller; 144- valve port; 145- middle partition; 146- pressure introduction channel; 147- air supply valve; 148- enthalpy increase port; 2- enthalpy increase component; 201- cylinder; 202- partition plate; 221- first chamber; 222- second chamber; 223- communicating hole; 224- intubation; 3- pressure relief pipeline; 4- first heat exchanger; 5- second heat exchanger; 501- first flow path; 502- second flow path; 6- air supply pipeline; 7- second solenoid valve; 8- first throttling device; 9- third heat exchanger; 10- liquid distributor; 11- second throttling device; 12- first solenoid valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] See also Figures 1 to 3 As shown, according to an embodiment of the present invention, a compressor is provided, which includes a compressor body 1 and an enthalpy increasing component 2 arranged on the compressor body 1; the compressor body 1 has an air intake port 101 and an air supply port 102, and the air intake port 101 is provided with an air intake pipe 103; the outlet of the enthalpy increasing component 2 is connected to the air supply port 102, and the enthalpy increasing component 2 is provided with a pressure relief pipeline 3, one end of the pressure relief pipeline 3 is connected to the inlet of the enthalpy increasing component 2, and the other end of the pressure relief pipeline 3 is connected to the air intake pipe 103, and the air pressure in the pressure relief pipeline 3 is greater than the air pressure in the air intake pipe 103.

[0039] Specifically, when the enthalpy increasing component 2 stops replenishing air to the compressor body 1, the refrigerant in the enthalpy increasing component 2 no longer flows into the air replenishment port 102, but accumulates in the enthalpy increasing component 2. Since the refrigerant injected into the compressor body 1 by the enthalpy increasing component 2 is a medium-pressure refrigerant between the exhaust 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. After the pressure relief pipeline 3 is connected to the suction pipe 103, the gas in the suction pipe 103 The medium-pressure refrigerant in the reheat increasing component 2 has a pressure lower than that of the refrigerant in the pressure relief pipeline 3, and the medium-pressure refrigerant in the reheat increasing component 2 flows into the intake pipe 103 with lower air pressure; as the refrigerant in the reheat increasing component 2 gradually flows into the intake pipe 103, the air pressure in the reheat increasing component 2 gradually decreases until the air pressure in the reheat increasing component 2 is balanced with the air pressure in the intake pipe 103, indicating that the air pressure in the reheat increasing component 2 has been reduced, that is, the air pressure on the side of the air supply valve 147 close to the reheat increasing component 2 is reduced, thereby preventing the air supply valve 147 from moving.

[0040] In this embodiment, by setting up the pressure relief pipeline 3, when the enthalpy increasing component 2 stops supplying air to the compressor body 1, the medium-pressure refrigerant in the enthalpy increasing component 2 can flow into the intake pipe 103 with lower air pressure. With the inflow of the refrigerant, the air pressure in the enthalpy increasing component 2 gradually decreases until it is balanced with the air pressure in the intake pipe 103. By balancing the pressure between the enthalpy increasing component 2 and the intake pipe 103, the problems of movement and abnormal noise caused by impact due to pressure imbalance of the air supply valve 147 and the problems of increased compression power consumption and poor energy efficiency can be prevented.

[0041] It is worth noting that this embodiment describes that the refrigerant in the enthalpy increasing component 2 is a medium-pressure refrigerant, and in other embodiments it can also be a refrigerant with other pressure values. When the refrigerant pressure in the enthalpy increasing component 2 is greater than the refrigerant pressure in the intake pipe 103, the pressure relief pipeline 3 can relieve pressure.

[0042] See also Figures 1 to 3 As shown, a first solenoid valve 12 is provided on the pressure relief pipeline 3 .

[0043] Specifically, when the enthalpy increasing component 2 needs to spray medium-pressure refrigerant into the compressor body 1, the first solenoid valve 12 is closed, and the refrigerant in the enthalpy increasing component 2 no longer flows into the intake pipe 103; when the enthalpy increasing component 2 stops supplying air to the compressor body 1, the refrigerant in the enthalpy increasing component 2 no longer flows into the air supply port 102, and the first solenoid valve 12 opens. At this time, the pressure in the enthalpy increasing component 2 is actually greater than the intake pressure of the compressor body 1. After the pressure relief line 3 is connected to the intake pipe 103, the air pressure in the intake pipe 103 is lower than the refrigerant in the pressure relief line 3, and the medium-pressure refrigerant in the enthalpy increasing component 2 flows into the intake pipe 103 with lower air pressure.

[0044] In this embodiment, the first solenoid valve 12 can automatically open or close the pressure relief line 3 according to the control signal, thereby controlling the pressure relief process to balance the pressure between the enthalpy increase component 2 and the suction pipe 103, prevent the air supply valve 147 from moving and hitting abnormal noise, and protect the normal operation and performance of the compressor. Moreover, this control method can accurately adjust the time and speed of pressure relief to adapt to different working conditions and requirements, and through the control of the solenoid valve, the pressure can be automatically relieved when the system pressure exceeds the safety threshold, thereby improving the safety and reliability of the system. It is based on the setting of the pressure relief line 3 that the solenoid valve can flexibly open or close the pressure relief line 3 according to the actual working conditions of the system to adapt to different working pressures and environmental conditions, thereby improving the adaptability and flexibility of the system.

[0045] See also Figures 1 to 3 As shown, the enthalpy increasing component 2 includes a cylinder 201 and a partition plate 202. The partition plate 202 divides the inner cavity of the cylinder 201 into a first chamber 221 and a second chamber 222. The first chamber 221 is connected to the inlet of the enthalpy increasing component 2, and the second chamber 222 is connected to the outlet of the enthalpy increasing component 2. A connecting hole 223 is provided on the partition plate 202, and the connecting hole 223 is used to connect 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 medium-pressure refrigerant is introduced into the inlet of the enthalpy increasing component 2, and the refrigerant flows from the first chamber 221 through the connecting hole 223 into the second chamber 222, and then flows out from the outlet of the enthalpy increasing component 2 and flows into the air supply port 102; when the enthalpy increasing component 2 stops increasing enthalpy, since the air pressure in the enthalpy increasing component 2 is greater than the air pressure in the intake pipe 103, the medium-pressure refrigerant in the first chamber 221 and the second chamber 222 is discharged from the enthalpy increasing component 2 until the air pressure in the enthalpy increasing component 2 gradually balances with the air pressure in the intake pipe 103.

[0047] In this embodiment, the working principle of the enthalpy increasing component 2 is the same as that of the liquid separator 10. The partition plate 202 divides the inner cavity of the cylinder 201 into a first chamber 221 and a second chamber 222, which is helpful for the separation of the gas-liquid two-phase refrigerant. Through the setting of the partition plate 202, the gas-liquid two-phase refrigerant can be separated under the action of gravity after entering the enthalpy increasing component 2, thereby improving the efficiency and performance of the system. The connecting hole 223 is used to connect the first chamber 221 and the second chamber 222. Such a setting can ensure the pressure balance between the two chambers, and the exhaust effect is better. Moreover, through the connecting 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 laws, avoiding the liquid-phase refrigerant from flowing into the compressor body 1 from the outlet of the enthalpy increasing component 2, thereby reducing the occurrence of compressor liquid hammer. In addition, when the enthalpy increasing component 2 sprays medium-pressure refrigerant into the compressor body 1, the refrigerant flows from the first chamber 221 through the connecting hole 223 into the second chamber 222, and then flows out from the outlet of the enthalpy increasing component 2 and flows into the air supply port 102. This arrangement controls the flow path of the refrigerant, so that the refrigerant can flow from the inlet to the outlet of the enthalpy increasing component 2 in an orderly manner, thereby improving the efficiency of the system.

[0048] See also Figures 1 to 3 , Fig. 9 As shown, the enthalpy increasing component 2 also includes a cannula 224, which is installed in the connecting hole 223. The cannula 224 is vertically arranged, the top end of the cannula 224 is connected to the first chamber 221, the bottom end of the cannula 224 is connected to the second chamber 222, the inlet of the enthalpy increasing component 2 is connected to the first chamber 221, and the outlet of the enthalpy increasing component 2 is connected to the second chamber 222.

[0049] Specifically, when the enthalpy increasing component 2 sprays medium-pressure refrigerant into the compressor body 1, the medium-pressure refrigerant is introduced into the inlet of the enthalpy increasing component 2. Due to the continuous inflow of refrigerant, the refrigerant in the first chamber 221 flows into the insert pipe 224, flows into the second chamber 222 along the insert pipe 224, and then flows out from the outlet of the enthalpy increasing component 2 and flows into the air supply port 102; when the enthalpy increasing component 2 stops increasing enthalpy, since the air pressure of the enthalpy increasing component 2 is greater than the air pressure in the intake pipe 103, the refrigerant in the second chamber 222 flows from the insert pipe 224 into the first chamber 221, and the medium-pressure refrigerant in the first chamber 221 is discharged from the enthalpy increasing component 2 until the air pressure in the enthalpy increasing component 2 gradually balances with the air pressure in the intake pipe 103.

[0050] In this embodiment, on the one hand, the partition plate 202 divides the inner cavity of the enthalpy increasing component 2 into a first chamber 221 and a second chamber 222, and then forms a secondary mutation of the airflow cross section through the insert 224, and utilizes the effect of multiple sound reflections of the airflow, so that the sound energy transmitted is attenuated more, the silencing effect is enhanced, and the noise reduction is strengthened. On the other hand, the insert 224 is vertically arranged, the top end is connected to the first chamber 221, and the bottom end is connected to the second chamber 222. Such a design allows the medium-pressure refrigerant to smoothly flow from the inlet of the enthalpy increasing component 2 into the first chamber 221, flow into the second chamber 222 through the insert 224, and then flow out from the outlet of the enthalpy increasing component 2 and flow into the air supply port 102. Through the arrangement of the insert 224, the flow path of the refrigerant inside the enthalpy increasing component 2 can be accurately controlled to ensure that the refrigerant flows in a predetermined order and direction, thereby improving the efficiency of the system and the accuracy of control. The presence of the cannula 224 can increase the disturbance of the fluid flow, and this disturbance can cause the fluid to mix in the radial direction. The cannula 224, as a flow disturbance element, can cause the refrigerant to generate a rotating 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 cannula 224, which helps to balance and adjust the pressure, reduce the impact noise and gas reflux problems of the air supply valve 147, and this structure can effectively improve the transmission loss and improve the compressor noise.

[0051] See also Figure 1 and Fig. 9 As shown, an air conditioning system includes a compressor, a first heat exchanger 4, a second heat exchanger 5 and an air supply pipeline 6, the compressor is the above-mentioned compressor, the compressor, the first heat exchanger 4 and the second heat exchanger 5 are connected in sequence, one end of the air supply pipeline 6 is connected to the outlet of the first heat exchanger 4, and the other end of the air supply pipeline 6 is connected to the inlet of the enthalpy increasing component 2, and a second solenoid valve 7 is arranged on the air supply pipeline 6.

[0052] Specifically, the refrigerant compressed by the compressor flows into the first heat exchanger 4, and 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 flows into the air supply pipeline 6. When the enthalpy increasing component 2 needs to spray the refrigerant into the compressor body 1, the second solenoid valve 7 is opened, and the refrigerant in the air supply pipeline 6 flows into the enthalpy increasing component 2, and the enthalpy increasing component 2 sprays the refrigerant into the air supply port 102. At this time, the first solenoid valve 12 is closed, that is, The refrigerant in the pressure relief pipeline 3 does not flow into the intake pipe 103; when the enthalpy increasing component 2 stops increasing enthalpy, the second solenoid valve 7 is closed, that is, the refrigerant in the first heat exchanger 4 does not flow into the air supply pipeline 6, and the medium-pressure refrigerant is accumulated in the enthalpy increasing component 2. When the first solenoid 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 intake pipe 103 again until the air pressure in the enthalpy increasing component 2 is balanced with the air pressure in the intake pipe 103.

[0053] In this embodiment, through the control of the second solenoid valve 7, the refrigerant can be accurately supplied to the enthalpy increasing component 2. When it is necessary to spray the refrigerant into the compressor body 1, the second solenoid valve 7 is opened, so that the refrigerant in the air supply pipeline 6 flows into the enthalpy increasing component 2, and the jet enthalpy is realized. The refrigerant compressed by the compressor is divided into two paths, one path flows into the second heat exchanger 5, and the other path flows into the air supply pipeline 6. This setting can optimize the distribution of the refrigerant and improve the energy efficiency and performance of the system. By setting the first solenoid valve 12 and the second solenoid valve 7, through the control of the solenoid valve, the pressure can be automatically released when the system pressure exceeds the safety threshold, preventing equipment damage or accidents caused by overpressure, thereby improving the safety and reliability of the system. When the enthalpy increasing component 2 needs to replenish air to the compressor body 1, the air replenishment to the compressor body 1 is realized.

[0054] See also Figure 1 and Fig. 9 As shown, the second heat exchanger 5 has a first flow path 501 and a second flow path 502 that are 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, and the air supply pipeline 6 includes a first pipe segment and a second pipe segment, one end of the first pipe segment is connected to the first heat exchanger 4, the other end of the first pipe segment is connected to the inlet of the second flow path 502, one end of the second pipe segment is connected to the outlet of the second flow path 502, and the other end of the second pipe segment is connected to the inlet of the enthalpy increasing component 2.

[0055] In this 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 supply pipeline 6 includes a first pipe section and a second pipe section. Such a design can accurately control the path of the refrigerant flowing from the first heat exchanger 4 to the second heat exchanger 5 and then to the enthalpy increasing component 2. In some cases, this setting allows the refrigerant to effectively exchange heat between the two heat exchangers, thereby improving the heat exchange efficiency of the system. By reasonably allocating the ratio of the 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] See also Figure 1 and Fig. 9 As shown, the second solenoid 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 solenoid valve 7 and the second heat exchanger 5 .

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

[0059] See also Figure 1 and Fig. 9 As shown, the air-conditioning system also includes a third heat exchanger 9 and a liquid separator 10. The liquid separator 10 is arranged on the compressor body 1, and the outlet of the liquid separator 10 is connected to the air intake port 101 of the compressor. One end of the air intake pipe 103 is connected to the inlet of the liquid separator 10, and the other end of the air intake pipe 103 is connected to the outlet of the third heat exchanger 9. The inlet of the third heat exchanger 9 is connected to the outlet of the first flow path 501.

[0060] In this embodiment, the liquid separator 10 is arranged on the compressor body 1, and its main function is to separate the droplets in the low-pressure and low-temperature steam from the evaporator, prevent the liquid refrigerant from entering the compressor cylinder, thereby avoiding the liquid hammer phenomenon and protecting the compressor. At the same time, the liquid separator 10 also has the functions of filtering, oil return, liquid storage, etc. The outlet of the liquid separator 10 is connected to the air intake port 101 of the compressor, one end of the air intake pipe 103 is connected to the inlet of the liquid separator 10, and the other end is connected to the outlet of the third heat exchanger 9. Such a design helps to optimize the air intake pipe 103, reduce the refrigerant gas-liquid separation and then send it to the compressor.

[0061] See also Figure 7 and Figure 8 As shown, as a specific implementation, the compressor body 1 of this embodiment is provided with two cylinders, the corresponding compressor cylinder body is provided with two air inlets 101, and the liquid separator 10 is provided with two air outlet pipes. The enthalpy increasing component 2 is arranged beside the liquid separator 10, and the enthalpy increasing component 2 can also play a role in gas-liquid separation.

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

[0063] See also Figure 1 and Fig. 9 As shown, a second throttling device 11 is arranged between the third heat exchanger 9 and the second heat exchanger 5 .

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

[0065] See also Figures 4 to 6As shown, as a specific embodiment, the compressor is a rolling rotor 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 rollers 143 are respectively arranged in the two cylinders, the two cylinders are separated by a middle partition 145, a pressure introduction channel 146 is arranged on the middle partition 145, and the first cylinder 141 and the second cylinder 142 are respectively provided with valve ports 144, and air replenishing valves 147 are respectively arranged at the valve ports 144, and an enthalpy increase port 148 is arranged on the side of the air replenishing valve 147 away from the pressure introduction channel 146. When the medium-pressure refrigerant flows into the pressure introduction channel 146, the air replenishing valve 147 opens, the valve port 144 opens, and the pressure introduction channel 146 is connected to the enthalpy increase port 148; when the valve port 144 is closed, the pressure introduction channel 146 is not connected to the enthalpy increase port 148. If the refrigerant pressure in the enthalpy increasing component 2 is greater than the suction pressure, the medium-pressure refrigerant is still accumulated in the pressure introduction channel 146, the valve plate will still be opened, the pressure relief line 3 will be opened and connected to the suction pipe 103, and as the refrigerant pressure in the enthalpy increasing component 2 gradually decreases, the air pressure in the pressure introduction channel 146 will also gradually decrease, thereby avoiding the movement of the valve plate. This embodiment is used to improve the noise, performance, and reliability degradation caused by the movement and untimely closure of the air valve when the "check valve type" jet enthalpy increasing compressor increases enthalpy; it is achieved by introducing low pressure or pressure relief at the inlet of the compressor enthalpy increasing component 2 to balance the residual high-pressure refrigerant inside the enthalpy increasing component 2.

[0066] See also Figure 1 and Fig. 9 As shown, a control method is used to control the above-mentioned air conditioning system. When a first solenoid valve 12 is provided on the pressure relief pipeline 3, the control method includes:

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

[0068] When the air conditioning system operates in the first working condition, the second solenoid valve 7 is closed, the air supply pipeline 6 is disconnected from the inlet of the enthalpy increasing component 2; the first solenoid valve 12 is opened, the pressure relief pipeline 3 is connected to the air intake 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 solenoid valve 12 is closed, and the pressure relief pipe 3 is disconnected from the intake pipe 103; the second solenoid valve 7 is opened, and the air supply pipe 6 is connected to the inlet of the enthalpy increasing component 2, and the enthalpy increasing component 2 supplies air to the compressor body 1.

[0070] Specifically, when the air conditioning system is running in the first working condition, the compression ratio of the compressor body 1, that is, the pressure ratio of the air intake port 101 and the air exhaust port is less than 2, the second solenoid valve 7 is closed, that is, the refrigerant in the first heat exchanger 4 does not flow into the air supply pipeline 6, and the medium-pressure refrigerant is accumulated in the enthalpy increasing component 2. The first solenoid valve 12 is opened, and 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 air intake pipe 103 until the enthalpy increasing component 2 is filled with medium-pressure refrigerant. The air pressure in the enthalpy component 2 is balanced with the air pressure in the intake pipe 103; when the air-conditioning system operates in the first working condition, the compression ratio of the compressor body 1, that is, the pressure ratio of the intake port 101 and the exhaust port is greater than 2, the second solenoid valve 7 is opened, and the refrigerant in the air supply pipeline 6 flows into the enthalpy increasing component 2, and the enthalpy increasing component 2 sprays the refrigerant into the air supply port 102. At this time, the first solenoid valve 12 is closed, that is, the refrigerant in the pressure relief channel does not flow into the intake pipe 103.

[0071] It is worth noting that in this embodiment, the opening of the first solenoid valve 12 and the closing of the second solenoid valve 7, as well as the closing of the first solenoid valve 12 and the opening of the second solenoid valve 7 are carried out simultaneously, which can prevent the refrigerant leakage in the components when the valve plate moves or the enthalpy increases to the greatest extent.

[0072] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: A compressor body (1) and an enthalpy-increasing component (2) arranged on the compressor body (1); The compressor body (1) has an air intake port (101) and an air supply port (102), and the air intake port (101) is provided with an air intake pipe (103); The outlet of the enthalpy increasing component (2) is connected to the air supply port (102), and the enthalpy increasing component (2) is provided with a pressure relief pipeline (3), one end of the pressure relief pipeline (3) is connected to the inlet of the enthalpy increasing component (2), and the other end of the pressure relief pipeline (3) is connected to the intake pipe (103), and the air pressure in the pressure relief pipeline (3) is greater than the air pressure in the intake pipe (103).

2. The compressor according to claim 1, characterized in that The pressure relief pipeline (3) is provided with a first solenoid valve (12).

3. The compressor according to claim 1, characterized in that The enthalpy increasing component (2) comprises a cylinder (201) and a partition plate (202); the partition plate (202) divides the inner cavity of the cylinder (201) into a first chamber (221) and a second chamber (222); the first chamber (221) is connected to the inlet of the enthalpy increasing component (2); the second chamber (222) is connected to the outlet of the enthalpy increasing component (2); a connecting hole (223) is provided on the partition plate (202); the connecting hole (223) is used to connect the first chamber (221) and the second chamber (222).

4. The compressor according to claim 3, characterized in that The enthalpy increasing component (2) also includes a insert (224), which is installed in the connecting hole (223). The insert (224) is vertically arranged, and the top end of the insert (224) is connected to the first chamber (221), and the bottom end of the insert (224) is connected to the second chamber (222). The inlet of the enthalpy increasing component (2) is connected to the first chamber (221), and the outlet of the enthalpy increasing component (2) is connected to the second chamber (222).

5. An air conditioning system, comprising a compressor, a first heat exchanger (4), a second heat exchanger (5) and an air supply pipeline (6), wherein the compressor is the compressor described in any one of claims 1 to 4, the compressor, the first heat exchanger (4) and the second heat exchanger (5) are connected in sequence, one end of the air supply pipeline (6) is connected to the outlet of the first heat exchanger (4), and the other end of the air supply pipeline (6) is connected to the inlet of the enthalpy increasing component (2), and a second solenoid valve (7) is provided on the air supply pipeline (6).

6. The air conditioning system according to claim 5, characterized in that: The second heat exchanger (5) comprises a first flow path (501) and a second flow path (502) which are isolated from each other; a pipeline between the first heat exchanger (4) and the second heat exchanger (5) is connected to the first flow path (501); the air supply pipeline (6) comprises a first pipe section and a second pipe section; one end of the first pipe section is connected to the first heat exchanger (4); 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); the other end of the second pipe section is connected to the inlet of the enthalpy increasing component (2).

7. The air conditioning system according to claim 6, characterized in that: The second solenoid 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 solenoid valve (7) and the second heat exchanger (5).

8. The air conditioning system according to claim 7, characterized in that: 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 to the air intake port (101) of the compressor; one end of the air intake pipe (103) is connected to the inlet of the liquid separator (10); the other end of the air intake pipe (103) is connected to the outlet of the third heat exchanger (9); and the inlet of the third heat exchanger (9) is connected to the outlet of the first flow path (501).

9. The air conditioning system according to claim 8, characterized in that: A second throttling device (11) is provided between the third heat exchanger (9) and the second heat exchanger (5).

10. A control method, characterized in that: The control method is used to control the air conditioning system according to any one of claims 5 to 9, and when a first solenoid valve (12) is provided on the pressure relief pipeline (3), the control method comprises: The air conditioning system has a first operating condition and a second operating condition, and the compression ratio of the first operating condition is smaller than the compression ratio of the second operating condition; When the air conditioning system operates in the first working condition, the second solenoid valve (7) is closed, the air supply pipeline (6) is disconnected from the inlet of the enthalpy increasing component (2); the first solenoid valve (12) is opened, the pressure relief pipeline (3) is connected to the air intake 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 solenoid valve (12) is closed, and the pressure relief pipeline (3) is disconnected from the intake pipe (103); the second solenoid valve (7) is opened, and the air supply pipeline (6) is connected to the inlet of the enthalpy increasing component (2), and the enthalpy increasing component (2) supplies air to the compressor body (1).

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