Air conditioner

Abstract

The utility model discloses an air conditioner, and relates to the technical field of air conditioners, the air conditioner comprises an indoor heat exchanger, a scroll compressor, an outdoor heat exchanger and a throttle valve, the indoor heat exchanger, the scroll compressor, the outdoor heat exchanger and the throttle valve are communicated to form a refrigerant loop; the throttling valve is connected with a differential pressure type flow adjusting mechanism, and the differential pressure type flow adjusting mechanism can enable the overflowing area of the throttling valve to be increased along with the reduction of the pressure of the side, close to the outdoor heat exchanger, of the throttling valve. According to the technical scheme, the energy consumption of the air conditioner is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an air conditioner. Background Technology

[0002] Currently, in air conditioners using scroll compressors, due to factors such as the machining precision of the scroll plate, there is an unevenness on the meshing end face of the scroll plate. During the meshing compression, there is a possibility of leakage at the meshing surface of the scroll plate.

[0003] After a leak occurs, the amount of exhaust gas entering the outdoor heat exchanger decreases, the exhaust pressure decreases, the suction pressure increases, the superheat of the indoor heat exchanger increases, the system capacity decreases, the ineffective compression work increases, the power increases, the energy efficiency of the entire air conditioning system drops sharply, and the energy consumption is high. Utility Model Content

[0004] The main purpose of this utility model is to propose an air conditioner that aims to reduce the energy consumption of the air conditioner.

[0005] To achieve the above objectives, the present invention proposes an air conditioner comprising an indoor heat exchanger, a scroll compressor, an outdoor heat exchanger, and a throttling valve. The indoor heat exchanger, the scroll compressor, the outdoor heat exchanger, and the throttling valve are connected to form a refrigerant circuit. The throttling valve is connected to a differential pressure flow adjustment mechanism, which can increase the flow area of ​​the throttling valve as the pressure on the side of the throttling valve closer to the outdoor heat exchanger decreases.

[0006] In one embodiment, the throttle valve is configured as a differential pressure throttle valve, and the differential pressure flow adjustment mechanism is located inside the differential pressure throttle valve.

[0007] In one embodiment, the differential pressure throttle valve includes:

[0008] A valve body having a valve cavity having a fluid inlet and a fluid outlet;

[0009] A valve stem is movably disposed in the valve cavity, the valve stem is provided with a throttling channel, and a flow passage is formed between the valve stem and the valve cavity;

[0010] A valve seat, fixed to the valve cavity, is provided with a valve port; and

[0011] The differential pressure flow adjustment mechanism is configured as an elastic element, which is located between the valve stem and the valve seat, so that the valve stem has a tendency to move away from the valve seat;

[0012] The differential pressure throttling valve has a first throttling state and a second throttling state. In the first throttling state, the valve stem overcomes the elastic force of the elastic element under the first refrigerant pressure to seal the edge of the valve port. The refrigerant flows through the valve port after being throttled by the throttling channel. In the second throttling state, the valve stem is pushed by a second refrigerant pressure that is less than the first refrigerant pressure. The elastic element causes a throttling gap to be formed between the valve stem and the edge of the valve port. The flow area of ​​the throttling gap is larger than the flow area of ​​the throttling channel. The refrigerant flows through the valve port after being throttled by the throttling gap from the flow channel.

[0013] In one embodiment, the flow area of ​​the throttling channel is 42%-92% of the flow area of ​​the throttling gap.

[0014] In one embodiment, the valve stem has an abutting slope at one end facing the valve seat, and a portion of the abutting slope extends into the valve port.

[0015] In one embodiment, the valve cavity is provided with an upper limit member, the valve stem includes a main stem portion and a fixing portion provided on the circumferential sidewall of the main stem portion, the throttling channel is provided on the main stem portion, the fixing portion is provided with a notch to form the flow channel between it and the valve cavity, and the fixing portion is used to abut against the upper limit member.

[0016] In one embodiment, the upper limit member is configured as an upper convex ring formed by the inward protrusion of the cavity wall of the valve chamber.

[0017] In one embodiment, the fixing part is installed at the end of the main rod portion away from the valve seat, and the end of the elastic member away from the valve seat is sleeved on the main rod portion and connected to the fixing part.

[0018] In one embodiment, the valve seat includes a base fixed to the valve cavity and a guide cylinder connected to the base, the valve port is disposed in the guide cylinder, and the end of the elastic member away from the valve stem is used to be sleeved on the guide cylinder.

[0019] In one embodiment, the cavity wall of the valve chamber protrudes inward to form a lower convex ring, and the base is provided with an annular groove along its circumference, the annular groove being secured to the lower convex ring.

[0020] In one embodiment, the throttle valve is configured as an electronic expansion valve, and the differential pressure flow adjustment mechanism includes a pressure detector located on the side of the throttle valve near the outdoor heat exchanger, and a controller electrically connected to both the pressure detector and the electronic expansion valve. The controller is used to control the opening degree of the electronic expansion valve based on the pressure detection result of the pressure detector.

[0021] This invention provides a refrigerant circuit by incorporating an indoor heat exchanger, a scroll compressor, an outdoor heat exchanger, and a throttling valve within an air conditioner. The throttling valve is connected to a differential pressure flow adjustment mechanism, which increases the flow area of ​​the throttling valve as the pressure on the side closer to the outdoor heat exchanger decreases. Compared to existing designs without this mechanism, this invention increases the flow area of ​​the throttling valve when leakage in the scroll compressor causes a pressure drop on the side closer to the outdoor heat exchanger. This increases the refrigerant circulation flow within the air conditioner, compensating for the reduced discharge volume due to compressor leakage. Consequently, the superheat of the indoor heat exchanger decreases, its capacity increases, ineffective compression work decreases, power decreases, and capacity rapidly increases, ensuring energy saving and emission reduction, thus lowering the air conditioner's energy consumption. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an embodiment of the air conditioner provided by this utility model;

[0024] Figure 2 for Figure 1 An exploded structural diagram of an embodiment of a throttle valve;

[0025] Figure 3 for Figure 2 A cross-sectional view of an embodiment of a throttle valve.

[0026] Explanation of icon numbers:

[0027] 10. Throttling valve; 20. Indoor heat exchanger; 30. Outdoor heat exchanger; 40. Scroll compressor; 50. Refrigerant circuit;

[0028] 100. Valve body; 110. Valve chamber; 120. Fluid inlet; 130. Fluid outlet; 140. Upper limit stop; 141. Upper convex ring; 150. Lower convex ring;

[0029] 200, valve stem; 210, throttling channel; 220, flow passage; 230, main stem section; 231, abutting slope; 240, fixing part; 241, notch; 242, fixing block; 250, throttling gap;

[0030] 300, Valve seat; 310, Valve port; 320, Base; 321, Annular groove; 330, Guide cylinder;

[0031] 400. Elastic components.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] Currently, in air conditioners using scroll compressors, due to factors such as the machining precision of the scroll plate, there is an unevenness on the meshing end face of the scroll plate. During the meshing compression, there is a possibility of leakage at the meshing surface of the scroll plate.

[0037] After a leak occurs, the amount of exhaust gas entering the outdoor heat exchanger decreases, the exhaust pressure decreases, the suction pressure increases, the superheat of the indoor heat exchanger increases, the system capacity decreases, the ineffective compression work increases, the power increases, the energy efficiency of the entire air conditioning system drops sharply, and the energy consumption is high.

[0038] This utility model proposes an air conditioner.

[0039] Please see Figure 1 In one embodiment of this utility model, the air conditioner includes an indoor heat exchanger 20, a scroll compressor 40, an outdoor heat exchanger 30, and a throttling valve 10. The indoor heat exchanger 20, scroll compressor 40, outdoor heat exchanger 30, and throttling valve 10 are sequentially connected to form a refrigerant circuit 50. The refrigerant circuit 50 is used to circulate refrigerant fluid in the indoor heat exchanger 20, scroll compressor 40, outdoor heat exchanger 30, and throttling valve 10.

[0040] The throttle valve 10 is connected to a differential pressure flow adjustment mechanism. The differential pressure flow adjustment mechanism can reduce the pressure on the side of the throttle valve 10 closer to the outdoor heat exchanger 30, thereby increasing the flow area of ​​the throttle valve 10.

[0041] Understandably, during operation, the scroll compressor 40 may experience leakage at the scroll plate meshing surface. When the scroll compressor 40 is operating normally, i.e., without leakage, the compressor can provide sufficient pressure. At this time, the discharge volume entering the outdoor heat exchanger 30 is normal, and the fluid pressure on the side of the throttle valve 10 near the outdoor heat exchanger 30 is normal. In this situation, the differential pressure flow adjustment mechanism ensures that the flow area of ​​the throttle valve 10 is in a normal state.

[0042] When the scroll compressor 40 leaks, the amount of exhaust gas entering the outdoor heat exchanger 30 decreases, and the fluid pressure on the side of the expansion valve 10 near the outdoor heat exchanger 30 decreases. At this time, the differential pressure flow adjustment mechanism adjusts and increases the flow area of ​​the expansion valve 10, thereby increasing the refrigerant circulation flow rate in the air conditioner to compensate for the reduced exhaust volume caused by the leak in the scroll compressor 40. Simultaneously, the superheat of the indoor heat exchanger 20 decreases, its capacity increases, ineffective compression work decreases, power decreases, and its capacity rapidly increases, ensuring energy saving and emission reduction in the air conditioner.

[0043] The technical solution of this utility model involves configuring an indoor heat exchanger 20, a scroll compressor 40, an outdoor heat exchanger 30, and a throttling valve 10 connected within an air conditioner to form a refrigerant circuit 50. The throttling valve 10 is connected to a differential pressure flow adjustment mechanism. This mechanism increases the flow area of ​​the throttling valve 10 as the pressure on the side of the throttling valve 10 closest to the outdoor heat exchanger 30 decreases. Compared to existing designs that lack a differential pressure flow adjustment mechanism, this utility model increases the flow area of ​​the throttling valve 10 when leakage in the scroll compressor 40 causes a pressure drop on the side of the throttling valve 10 closest to the outdoor heat exchanger 30. This increases the refrigerant circulation flow rate within the air conditioner, compensating for the reduced exhaust volume due to leakage in the scroll compressor 40, thereby reducing the energy consumption of the air conditioner.

[0044] In this embodiment of the invention, the throttle valve 10 is configured as a differential pressure throttle valve 10, and the differential pressure flow adjustment mechanism is located inside the differential pressure throttle valve 10. Thus, by providing a differential pressure throttle valve 10 with a differential pressure flow adjustment mechanism, when the scroll compressor 40 leaks, the differential pressure throttle valve 10 automatically adjusts its flow area, thereby adjusting the flow rate, and thus achieving automatic adjustment of the refrigerant flow in the air conditioner.

[0045] However, this design is not limited to this. In other embodiments, the throttle valve 10 can also be configured as an electronic expansion valve. The differential pressure flow adjustment mechanism includes a pressure detector located on the side of the throttle valve 10 near the outdoor heat exchanger 30, and a controller electrically connected to both the pressure detector and the electronic expansion valve. The controller controls the opening degree of the electronic expansion valve based on the pressure detection result of the pressure detector. Specifically, the pressure detector detects the fluid pressure on the side of the throttle valve 10 near the outdoor heat exchanger 30 and transmits the measurement result to the controller, which then controls the opening degree of the electronic expansion valve based on the measurement result. In this way, the throttle valve 10 can also be automatically adjusted according to the fluid pressure in the refrigerant circuit 50.

[0046] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the differential pressure throttle valve 10 includes a valve body 100, a valve stem 200, a valve seat 300, and a differential pressure flow adjustment mechanism, wherein the differential pressure flow adjustment mechanism is configured as an elastic element 400. The valve body 100 has a valve cavity 110, which has a fluid inlet 120 and a fluid outlet 130; the valve stem 200 is movably disposed in the valve cavity 110 and is located near the fluid inlet 120, the valve stem 200 has a throttling channel 210, and a flow passage 220 is formed between the valve stem 200 and the valve cavity 110; the valve seat 300 is fixed in the valve cavity 110 and is located near the fluid outlet 130, the valve seat 300 has a valve port 310; the elastic element 400 is located between the valve body 100 and the valve seat 300, and is used to give the valve stem 200 a tendency to move away from the valve seat 300.

[0047] The differential pressure throttle valve 10 has a first throttling state and a second throttling state. In the first throttling state, the valve stem 200 overcomes the elastic force of the elastic element 400 under the first refrigerant pressure and seals the edge of the valve port 310. The refrigerant flows through the throttling channel 210 after being throttled. In the second throttling state, the valve stem 200 is pushed by a second refrigerant pressure that is less than the first refrigerant pressure. The elastic element 400 forms a throttling gap 250 between the valve stem 200 and the edge of the valve port 310. The flow area of ​​the throttling gap 250 is larger than the flow area of ​​the throttling channel 210. The refrigerant flows through the throttling gap 250 after being throttled from the flow channel 220 and then flows through the valve port 310.

[0048] Understandably, when the scroll compressor 40 is operating normally, the differential pressure throttling valve 10 is in the first throttling state. The pressure on the side of the differential pressure throttling valve 10 closest to the outdoor heat exchanger 30 is the first refrigerant pressure, which is relatively high. Under the first refrigerant pressure, the valve stem 200 can compress the elastic element 400 and abut against the valve seat 300 to seal the edge of the valve port 310, thereby allowing the refrigerant to flow through the throttling channel 210, the valve port 310, and then out of the fluid outlet 130.

[0049] When the scroll compressor 40 leaks, the differential pressure throttling valve 10 is in a second throttling state. The pressure on the side of the differential pressure throttling valve 10 closest to the outdoor heat exchanger 30 is the second refrigerant pressure, which is lower at this time. That is, the second refrigerant pressure is lower than the first refrigerant pressure. The decrease in refrigerant pressure causes the elastic element 400 to push the valve stem 200 away from the valve seat 300 under its own elastic force, so that a throttling gap 250 is formed between the edge of the valve stem 200 and the valve port 310. The flow area of ​​the throttling gap 250 is larger than the flow area of ​​the throttling channel 210, so that the refrigerant flows through the flow gap, the valve port 310, and then out of the fluid outlet 130.

[0050] Thus, when the pressure of the differential pressure throttle valve 10 near the outdoor heat exchanger 30 is high, the refrigerant flows through the throttle channel 210 with a small flow area before flowing through the valve port 310; when the pressure of the differential pressure throttle valve 10 near the outdoor heat exchanger 30 is low, the refrigerant flows through the flow gap with a large flow area before flowing through the valve port 310; thus, when the scroll compressor 40 leaks and the pressure on the side of the throttle valve 10 near the outdoor heat exchanger 30 decreases, the flow area of ​​the throttle valve 10 is increased, thereby increasing the refrigerant circulation flow rate in the air conditioner, compensating for the reduced exhaust volume due to the leakage of the scroll compressor 40, and thus reducing the energy consumption of the air conditioner.

[0051] It is worth noting that the specific pressure values ​​of the first and second refrigerant pressures can be set according to different air conditioners, and there are no restrictions here.

[0052] In an embodiment of this invention, the flow area of ​​the throttling channel 210 is 42%-92% of the flow area of ​​the throttling gap 250. Thus, while ensuring that the fluid flow rate through the throttling channel 210 is less than the fluid flow rate through the flow channel 220, the usage requirements of different air conditioners can also be met.

[0053] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the valve stem 200 has an abutting inclined surface 231 at one end facing the valve seat 300, and part of the abutting inclined surface 231 extends into the valve port 310.

[0054] Understandably, when the valve stem 200 abuts against the valve seat 300, the flow gap cannot communicate with the valve port 310. To improve the sealing performance of the abutment between the valve stem 200 and the valve seat 300, an abutment slope 231 is provided on the valve stem 200. Thus, when the differential pressure throttle valve 10 is in the first throttling state, and the valve stem 200 abuts against the valve seat 300 to seal the edge of the valve port 310, the abutment slope 231 contacts the edge of the valve port 310. Compared to the abutment plane, the abutment slope 231 prevents the flow gap from communicating with the valve port 310 in the first throttling state, thereby improving the sealing performance of the abutment between the valve stem 200 and the valve seat 300.

[0055] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the valve cavity 110 is provided with an upper limit member 140, the valve stem 200 includes a main stem portion 230 and a fixing portion 240 provided on the circumferential side wall of the main stem portion 230, the throttling channel 210 is provided on the main stem portion 230, the fixing portion 240 is provided with a notch 241 to form a flow channel 220 between it and the valve cavity 110, and the fixing portion 240 is used to abut against the upper limit member 140.

[0056] Specifically, the valve cavity 110 is provided with an upper limit stop 140, which abuts against the end of the valve stem 200 away from the valve seat 300 to limit the travel of the valve stem 200, allowing the valve stem 200 to move between the valve seat 300 and the upper limit stop 140. In the embodiment shown in the figures of this utility model, the valve body 100 has a tubular structure, with the fluid inlet 120 and the fluid outlet 130 arranged opposite to each other. The upper limit stop 140 prevents the valve stem 200 from detaching from the valve body 100 under the elastic force of the elastic member 400, or from colliding with the valve body 100, and also ensures the normal operation of the throttle valve 10.

[0057] However, this design is not limited to this. In other embodiments, the upper end of the valve body 100 can be closed, the fluid inlet 120 can be located on the side wall of the valve body 100 near the upper end, and the fluid outlet 130 can be located at the lower end of the valve body 100. In this way, the upper limit member 140 may not be provided in the valve cavity 110.

[0058] The valve stem 200 includes a main stem portion 230 and a fixing portion 240. A throttling channel 210 is provided through the main stem portion 230 along the axial direction of the valve stem 200 to connect the fluid inlet 120 and the valve port 310. The fixing portion 240 is fixedly connected to the circumferential sidewall of the main stem portion 230 and can move relative to the valve cavity 110 to realize the movement of the valve stem 200.

[0059] Meanwhile, the fixing part 240 is also used to abut against the upper limit member 140, thereby limiting the travel of the valve stem 200. That is, in one embodiment, the fixing part 240 abuts against the upper limit member 140. The fixing part 240 is provided with a notch 241 to form a flow channel 220, which can connect the two ends of the valve stem 200 in the axial direction, so that fluid can flow out through the flow channel 220, the throttling gap 250, the valve port 310 and the fluid outlet 130.

[0060] In one embodiment, the fixing part 240 includes a plurality of fixing blocks 242 and a notch 241 between adjacent fixing blocks 242. The arrangement of the plurality of fixing blocks 242 is beneficial to the installation stability and movement stability of the valve stem 200. The plurality of fixing blocks 242 are evenly spaced along the circumference of the main stem part 230, thereby further improving the installation stability and movement stability of the valve stem 200. In the embodiment shown in the figures of this utility model, four fixing blocks 242 are evenly arranged along the circumference of the main stem part 230. Of course, in other embodiments, three, five, etc., fixing blocks 242 may also be provided, which is not limited here.

[0061] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the upper limit member 140 is configured as an upper convex ring 141 formed by the inward protrusion of the cavity wall of the valve cavity 110.

[0062] Understandably, the contact portion between the upper convex ring 141 and the valve stem 200 is arc-shaped, while the contact portion between the valve stem 200 and the upper convex ring 141 is flat. Thus, when the valve stem 200 contacts the upper convex ring 141, it is a contact between a flat surface and an arc-shaped surface, which is a line contact. Compared to setting the contact portion of the upper limit member 140 to a flat surface, making the contact between the valve stem 200 and the upper limit member 140 a plane-to-plane contact, line contact reduces frictional resistance during contact, thereby reducing noise and improving the comfort of using the air conditioner. Simultaneously, the upper convex ring 141 avoids the need for additional limiting members within the valve cavity 110, which facilitates structural simplification and weight reduction of the differential pressure throttle valve 10. Of course, in other embodiments, the upper limit member 140 can also be a limiting collar located within the valve cavity 110.

[0063] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the fixing part 240 is installed on the end of the main rod part 230 away from the valve seat 300, and the end of the elastic member 400 away from the valve seat 300 is sleeved on the main rod part 230 and connected to the fixing part 240.

[0064] Specifically, in the solution shown in the figures of this utility model, the fixing part 240 is only installed at the end of the main stem 230 away from the valve seat 300. In this way, the fixing part 240 can abut against the upper limit member 140, thereby limiting the travel of the valve stem 200. Eliminating the fixing part 240 at the end of the main stem 230 near the valve seat 300 is beneficial for the weight reduction of the valve stem 200 and the throttle valve 10.

[0065] In the embodiment shown in the figures of this utility model, the elastic element 400 is configured as a spring. Thus, the end of the elastic element 400 away from the valve seat 300 can also be sleeved outside the main rod portion 230 and connected to the fixing portion 240, thereby facilitating the installation of the elastic element 400. The elastic element 400 is sleeved on the main rod portion 230, which provides guidance for the compression and extension of the elastic element 400, preventing skewing of the elastic element 400 during extension and retraction, and ensuring the direction of movement of the valve stem 200. However, this design is not limited to this; in other embodiments, the elastic element 400 can also be a spring sheet, etc.

[0066] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the valve seat 300 includes a base 320 fixed to the valve cavity 110 and a guide cylinder 330 connected to the base 320. The valve port 310 is located in the guide cylinder 330, and the end of the elastic member 400 away from the valve stem 200 is used to be sleeved on the guide cylinder 330.

[0067] Specifically, in the embodiment shown in the figures of this utility model, the valve seat 300 includes a base 320 and a guide cylinder 330. The base 320 is used for fixed connection with the valve body 100, and the guide cylinder 330 provides an installation position for the elastic element 400. The guide cylinder 330 is located at the axial position of the base 320, and the valve port 310 passes through both ends of the guide cylinder 330 along its axial direction. In one embodiment, the base 320 and the guide cylinder 330 are integrally formed, which facilitates the processing and forming of the valve seat 300. It can be understood that in one embodiment, the elastic element 400 is configured as a spring, with the end of the spring away from the valve stem 200 sleeved outside the guide cylinder 330. Thus, the configuration of the guide cylinder 330 provides guidance for the compression and extension of the spring. Further, the two ends of the elastic element 400 are respectively sleeved on the guide cylinder 330 and the main rod portion 230. Both the guide cylinder 330 and the main rod portion 230 provide guidance for the elastic element 400, thereby ensuring the extension and contraction direction of the elastic element 400.

[0068] Please see Figure 2 and Figure 3 In an embodiment of this utility model, the cavity wall of the valve cavity 110 protrudes inward to form a lower convex ring 150, and the base 320 is provided with an annular groove 321 along its circumference, and the annular groove 321 is fixed to the lower convex ring 150.

[0069] Specifically, in the embodiment shown in the figures of this utility model, the valve seat 300 is fixedly connected to the lower convex ring 150 of the valve body 100. More specifically, the base 320 has an annular groove 321 at its outer periphery along its circumference, and the valve body 100 has an inwardly protruding lower convex ring 150. Thus, the valve seat 300 is secured to the lower convex ring 150 by the annular groove 321, thereby achieving a fixed connection between the valve seat 300 and the valve body 100. The lower convex ring 150 avoids the need for additional limiting components in the valve cavity 110, which is beneficial for simplifying the structure of the throttle valve 10.

[0070] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An air conditioner, characterized in that, The device includes an indoor heat exchanger, a scroll compressor, an outdoor heat exchanger, and a throttling valve. The indoor heat exchanger, the scroll compressor, the outdoor heat exchanger, and the throttling valve are connected to form a refrigerant circuit. The throttling valve is connected to a differential pressure flow adjustment mechanism, which increases the flow area of ​​the throttling valve as the pressure on the side of the throttling valve closer to the outdoor heat exchanger decreases.

2. The air conditioner as described in claim 1, characterized in that, The throttle valve is configured as a differential pressure throttle valve, and the differential pressure flow adjustment mechanism is located inside the differential pressure throttle valve.

3. The air conditioner as described in claim 2, characterized in that, The differential pressure throttle valve includes: A valve body having a valve cavity having a fluid inlet and a fluid outlet; A valve stem is movably disposed in the valve cavity, the valve stem is provided with a throttling channel, and a flow passage is formed between the valve stem and the valve cavity; A valve seat, fixed to the valve cavity, is provided with a valve port; and The differential pressure flow adjustment mechanism is configured as an elastic element, which is located between the valve stem and the valve seat, so that the valve stem has a tendency to move away from the valve seat; The differential pressure throttling valve has a first throttling state and a second throttling state. In the first throttling state, the valve stem overcomes the elastic force of the elastic element under the first refrigerant pressure to seal the edge of the valve port. The refrigerant flows through the valve port after being throttled by the throttling channel. In the second throttling state, the valve stem is pushed by a second refrigerant pressure that is less than the first refrigerant pressure. The elastic element causes a throttling gap to be formed between the valve stem and the edge of the valve port. The flow area of ​​the throttling gap is larger than the flow area of ​​the throttling channel. The refrigerant flows through the valve port after being throttled by the throttling gap from the flow channel.

4. The air conditioner as described in claim 3, characterized in that, The flow area of ​​the throttling channel is 42%-92% of the flow area of ​​the throttling gap.

5. The air conditioner as described in claim 3, characterized in that, The valve stem has an abutting slope at one end facing the valve seat, and part of the abutting slope extends into the valve port.

6. The air conditioner as described in claim 3, characterized in that, The valve cavity is provided with an upper limit positioner. The valve stem includes a main stem portion and a fixing portion provided on the circumferential sidewall of the main stem portion. The throttling channel is provided on the main stem portion. The fixing portion is provided with a notch to form the flow channel between itself and the valve cavity. The fixing portion is used to abut against the upper limit positioner.

7. The air conditioner as described in claim 6, characterized in that, The upper limit positioner is configured as an upper convex ring formed by the inward protrusion of the cavity wall of the valve chamber.

8. The air conditioner as described in claim 6, characterized in that, The fixing part is installed at the end of the main rod that is away from the valve seat, and the elastic element is sleeved on the main rod that is away from the valve seat and connected to the fixing part.

9. The air conditioner as described in claim 3, characterized in that, The valve seat includes a base fixed to the valve cavity and a guide cylinder connected to the base. The valve port is located in the guide cylinder, and the end of the elastic element away from the valve stem is used to be sleeved on the guide cylinder.

10. The air conditioner as described in claim 9, characterized in that, The valve cavity has an inwardly protruding lower convex ring on its cavity wall, and the base has an annular groove along its circumference, which is secured to the lower convex ring.

11. The air conditioner as claimed in claim 1, characterized in that, The throttle valve is configured as an electronic expansion valve. The differential pressure flow adjustment mechanism includes a pressure detector located on the side of the throttle valve near the outdoor heat exchanger, and a controller electrically connected to both the pressure detector and the electronic expansion valve. The controller is used to control the opening degree of the electronic expansion valve according to the pressure detection result of the pressure detector.

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