Refrigerant throttling liquid separator

Abstract

The utility model discloses a refrigerant throttling liquid distributor which comprises an inlet end and an outlet end provided with a plurality of throttlers, and the inlet end and the outlet end are connected in a sealed mode to form a valve element cavity. The throttling valve element is embedded in the valve element cavity, the throttling valve element is provided with at least one spiral capillary flow guide groove, and the inlet end and the outlet end are communicated through the spiral capillary flow guide groove. Due to the arrangement of the spiral capillary diversion trenches, after pure liquid phase refrigerants flow into the multiple spiral capillary diversion trenches, the pure liquid phase refrigerants are converted into gas-liquid mixed phase refrigerants due to the fact that the cross sectional areas of the spiral capillary diversion trenches are small and the flow resistance is large, and the throttling effect is achieved. The multiple paths of gas-liquid mixed phase refrigerants obtained after flow division and throttling continue to flow into the multiple corresponding throttlers to continue to be throttled, and then the dual effects of throttling and liquid separation are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of throttling devices, and in particular relates to a refrigerant throttling liquid distributor. Background Art

[0002] Refrigeration systems usually need to be equipped with evaporators to deliver refrigerant to the space to be refrigerated. For distributed refrigeration units with multiple evaporators or evaporators with multiple pipes in parallel, the refrigerant needs to be evenly distributed to multiple pipes of each unit or evaporator. During the distribution process, the refrigerant needs to be throttled by a throttling device to make the refrigerant a gas-liquid two-phase flow with refrigeration capacity.

[0003] There are two mainstream liquid separation technologies at present. One is to use the method of first separation and then throttling, first divide the liquid refrigerant into multiple paths, and then throttle through the throttling device of each path. To save costs, capillary tubes are usually used for throttling. The second is to throttle the liquid refrigerant into a gas-liquid two-phase flow first. The throttling device can be a capillary tube or an expansion valve, and then separate the liquid through a dedicated liquid separation head.

[0004] For small refrigeration systems, if the flow is split first and then capillary throttling is used, since the total cooling capacity of the small refrigeration system is small, after being divided into multiple evaporators, the cooling capacity of each evaporator is further reduced. According to the capillary principle, the length of each capillary increases geometrically. This greatly increases the material cost, production cost, volume and weight. If the expansion valve throttling is used, the expansion valve itself is expensive, and the subsequent liquid separation head has high requirements for the installation process, such as being installed vertically in a static state so that the liquid separation is not affected by the gravity of the refrigerant itself, and it is possible to evenly separate the gas-liquid two-phase flow. Small refrigeration systems are generally used in wearable refrigeration systems such as air-conditioning clothing. When the wearer is active, the small refrigeration system will shake. Therefore, the liquid separation head cannot always remain vertical, and the effect of uniform liquid separation cannot be guaranteed. Therefore, it is necessary to improve it. Utility Model Content

[0005] The utility model aims to solve the technical problem that the existing liquid distributor head has strict installation requirements and cannot be used in wearable refrigeration systems. On the one hand, it provides a new refrigerant throttling liquid distributor.

[0006] The refrigerant throttling liquid distributor of the utility model comprises:

[0007] An inlet end and an outlet end provided with a plurality of throttles, wherein the inlet end and the outlet end are sealed and connected to form a valve core cavity;

[0008] A throttling valve core is embedded in the valve core cavity. The throttling valve core has at least one spiral capillary guide groove, and the spiral capillary guide groove connects the inlet end and the outlet end.

[0009] Preferably, the inlet end has an inlet cylinder;

[0010] The outlet end also has an outlet cylinder, the multiple throttles are arranged at the tail end of the outlet cylinder, the outlet cylinder is sealed and connected to the inlet cylinder, and the valve core cavity is formed inside.

[0011] Preferably, there are a plurality of spiral capillary guide grooves, and the plurality of spiral capillary guide grooves are evenly spaced and distributed on the throttling valve core, and each spiral capillary guide groove on the throttling liquid separation valve core is connected to a corresponding throttle.

[0012] Preferably, a plurality of the spiral capillary guide grooves are evenly spaced and distributed on the outer surface of the throttling valve core.

[0013] Preferably, a sealing surface is provided at the tail end of the outlet;

[0014] A plurality of throttles pass through the sealing surface and are communicated with corresponding spiral capillary guide grooves.

[0015] Preferably, the tail end of the throttle valve core has:

[0016] A plurality of limit posts are arranged at intervals along the radial direction of the valve core cavity, one end of each limit post is fixed to the tail end of the throttling valve core and is located between the outlets of two adjacent spiral capillary guide grooves, and the other end of each limit post is against the sealing surface;

[0017] A plurality of flow-dividing chambers are formed between two adjacent limiting columns. One end of a plurality of throttles passes through the sealing surface and is inserted into the corresponding flow-dividing chamber to communicate with the corresponding spiral capillary guide groove.

[0018] Preferably, the throttle is a capillary tube, and the capillary tube passes through the sealing surface and extends axially for a certain length in a direction close to the throttle valve core to form a capillary tube extension structure;

[0019] The axial length of the limiting column is greater than the length of the capillary extending into the structure.

[0020] Preferably, the plurality of diversion chambers are not interconnected;

[0021] The multiple spiral capillary guide grooves are not connected to each other.

[0022] Preferably, the refrigerant throttling distributor further comprises:

[0023] The filter core is arranged inside the inlet end and located at the head end side of the throttle valve core.

[0024] Preferably, the outer surface of the throttle valve core is seamlessly fitted with the inner surfaces of the inlet cylinder and the outlet cylinder, so that the spiral capillary guide groove forms a passage;

[0025] And / or, the spiral lines of the plurality of spiral capillary guide grooves are consistent;

[0026] The number of the spiral capillary guide grooves is an integer multiple of the throttle;

[0027] And / or, the inlet end has an inlet pipe connected to the inlet cylinder at the inlet end;

[0028] And / or, the throttle is a capillary tube or an expansion valve.

[0029] Another object of the present invention is to provide a refrigerant throttling and liquid separation method implemented by using the refrigerant throttling and liquid separation device of the present invention, the method comprising the following steps:

[0030] S1, liquid refrigerant enters the valve core cavity through the inlet end;

[0031] S2, the liquid refrigerant in the valve core cavity is throttled and converted into a uniform gas-liquid mixed phase through the spiral capillary guide groove on the throttling valve core;

[0032] S3, the gas-liquid mixed uniform phase refrigerant after throttling in step S2 is divided into multiple throttles at the outlet end.

[0033] In a preferred example, the refrigerant throttling and liquid separation method is performed by using a refrigerant throttling liquid separator, and the refrigerant throttling liquid separator includes:

[0034] An inlet end and an outlet end provided with a plurality of throttles, wherein the inlet end and the outlet end are sealed and connected to form a valve core cavity;

[0035] A throttling valve core is embedded in the valve core cavity. The throttling valve core has at least one spiral capillary guide groove, and the spiral capillary guide groove connects the inlet end and the outlet end.

[0036] In a preferred example, the inlet end has an inlet cylinder;

[0037] The outlet end also has an outlet cylinder, the multiple throttles are arranged at the tail end of the outlet cylinder, the outlet cylinder is sealed and connected to the inlet cylinder, and the valve core cavity is formed inside.

[0038] In a preferred example, there are a plurality of spiral capillary guide grooves, and the plurality of spiral capillary guide grooves are evenly spaced and distributed on the throttling valve core, and each spiral capillary guide groove on the throttling liquid separation valve core is connected to a corresponding throttle.

[0039] Step S2 specifically includes: the liquid refrigerant in the valve core cavity is diverted and throttled through a plurality of spiral capillary guide grooves on the throttling valve core to be converted into a multi-path gas-liquid mixed uniform phase;

[0040] Specifically, step S3 is that the multi-channel gas-liquid mixed uniform phase refrigerant after being divided and throttled in step S2 flows into the corresponding multiple throttles at the outlet end respectively.

[0041] In a preferred example, a plurality of the spiral capillary guide grooves are evenly spaced and distributed on the outer surface of the throttle valve core.

[0042] In a preferred example, a sealing surface is provided at the tail end of the outlet end;

[0043] A plurality of throttles pass through the sealing surface and are communicated with corresponding spiral capillary guide grooves.

[0044] In a preferred example, the tail end of the throttle valve core has:

[0045] A plurality of limit posts are arranged at intervals along the radial direction of the valve core cavity, one end of each limit post is fixed to the tail end of the throttling valve core and is located between the outlets of two adjacent spiral capillary guide grooves, and the other end of each limit post is against the sealing surface;

[0046] A plurality of flow-dividing chambers are formed between two adjacent limiting columns. One end of a plurality of throttles passes through the sealing surface and is inserted into the corresponding flow-dividing chamber to communicate with the corresponding spiral capillary guide groove.

[0047] In a preferred example, the throttle is a capillary tube, and the capillary tube passes through the sealing surface and axially extends a certain length in a direction close to the throttle valve core to form a capillary tube extension structure;

[0048] The axial length of the limiting column is greater than the length of the capillary extending into the structure.

[0049] In a preferred example, the refrigerant throttling distributor further includes:

[0050] A filter core, arranged inside the inlet end and located at the head end side of the throttle valve core;

[0051] The refrigerant throttling and liquid separation method further includes between step S1 and step S2:

[0052] In step S2A, the liquid refrigerant entering the valve core cavity is first filtered by the filter element and then proceeds to step S2.

[0053] In a preferred example, the plurality of diversion chambers are not interconnected;

[0054] The multiple spiral capillary guide grooves are not connected to each other;

[0055] And / or, the outer surface of the throttle valve core is seamlessly fitted with the inner surfaces of the inlet cylinder and the outlet cylinder, so that the spiral capillary guide groove forms a passage;

[0056] and / or,

[0057] The spiral lines of the plurality of spiral capillary guide grooves are consistent;

[0058] The number of the spiral capillary guide grooves is an integer multiple of the throttle;

[0059] And / or, the throttle is a capillary tube or an expansion valve.

[0060] The positive and progressive effects of the utility model are:

[0061] 1) The utility model provides a spiral capillary guide groove. After the pure liquid refrigerant is divided into multiple spiral capillary guide grooves, it is converted into a gas-liquid mixed phase refrigerant due to the small cross-sectional area and large flow resistance of the spiral capillary guide groove, thereby forming a throttling effect. The multi-path gas-liquid mixed phase refrigerant after diversion and throttling continues to flow into the corresponding multiple throttles for further throttling, thereby achieving the dual effects of throttling and liquid separation.

[0062] 2) Spiral capillary guide grooves are used for flow diversion and throttling. During the spiral movement of the refrigerant, the gas phase refrigerant and the liquid phase refrigerant are evenly mixed in any direction. Therefore, the refrigerant throttling distributor of the utility model can be set at any angle and in any direction without being perpendicular to the ground.

[0063] 3) When a capillary tube is used as a throttle, the refrigerant throttling liquid distributor of the utility model is used for liquid separation and throttling, thereby reducing the use of the capillary tube and reducing the number and volume of the capillary tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic diagram of the planar structure of the refrigerant throttling liquid distributor of the utility model;

[0065] Figure 2 It is a schematic diagram of the planar structure decomposition of the refrigerant throttling liquid distributor of the utility model;

[0066] Figure 3 It is a structural schematic diagram of the import end of the utility model;

[0067] Figure 4A It is a three-dimensional structural schematic diagram of the outlet end of the utility model;

[0068] Figure 4B It is a perspective planar structural diagram of the outlet end of the utility model;

[0069] Figure 5A and 5B It is a three-dimensional structural schematic diagram of the throttle valve core of the utility model;

[0070] Figure 6This is a sectional view of the tail end of the outlet cylinder of the utility model;

[0071] Figure 7 The utility model is a flow chart of the refrigerant throttling and liquid separation method. DETAILED DESCRIPTION

[0072] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0073] like Figure 1 and Figure 2 As shown, the refrigerant throttling liquid distributor of the utility model comprises an inlet end 10, an outlet end 20, a filter core 40 and a throttling valve core 30. Pure liquid refrigerant enters from the inlet end 10, is filtered by the filter core 40, and is converted into a multi-channel gas-liquid mixed phase refrigerant after liquid separation and throttling by the throttling valve core 30. The multi-channel gas-liquid mixed phase refrigerant flows out from the outlet end 20 and is further throttled by the throttler at the outlet end 20. The throttler can be a capillary tube 22 or an expansion valve, preferably a capillary tube 22.

[0074] like Figures 2-3 As shown, the throttle is illustrated as a capillary tube 22. In this example, the inlet end 10 has an inlet pipe 13 and an inlet cylinder 11 in sequence along the refrigerant flow direction. The inlet pipe 13 and the inlet cylinder 11 can be made of copper or brass. The inlet cylinder 11 is a cylindrical structure with a main body of a hollow cylinder and a head end in a frustum shape. The inner diameter of the inlet pipe 13 is smaller than the inner diameter of the main body of the inlet cylinder 11, is consistent with the size of the head end of the inlet cylinder 11, and is integrally formed and connected to the head end of the inlet cylinder 11 of the inlet end 10. Pure liquid refrigerant flows into the main body of the inlet cylinder 11 of the inlet end 10 through the inlet pipe 13.

[0075] like Figure 2 and 4AAs shown in Figure 4B, the outlet end 20 has an outlet cylinder 21, a sealing surface 23 and a plurality of capillaries 22. The main body 21b of the outlet cylinder 21 is also a hollow cylinder and is consistent with the inner diameter of the inlet cylinder 11, and is also made of copper or brass. The head end 21a of the outlet cylinder 21 is a hollow cylinder with an inner diameter slightly larger than the main body 21b of the outlet cylinder 21. The tail end of the main body of the inlet cylinder 11 is inserted into the head end 21a of the outlet cylinder 21 and docked with the main body 21b of the outlet cylinder 21, and the head end 21a of the outlet cylinder 21 seals and connects the tail end of the main body of the inlet cylinder 11 with the main body 21b of the outlet cylinder 21. The sealing surface 23 of the outlet end 20 is arranged at the tail end of the outlet end 20. The capillaries 22 are also made of copper, and one end of the plurality of capillaries 22 is evenly spaced through the sealing surface 23 and enters the main body 21b of the outlet cylinder 21.

[0076] In this way, if Figure 2 , 5AAs shown in Figures 5B and 6, a valve core cavity 12 is formed between the main body of the inlet cylinder 11 and the main body of the outlet cylinder 21, and a throttle valve core 30 is embedded in the valve core cavity 12. The throttle valve core 30 is a solid cylinder, also made of brass, and a plurality of spiral capillary guide grooves 31 are provided on the outer surface of the throttle valve core 30. The throttle valve core 30 is seamlessly fitted with the inner surfaces of the inlet cylinder 11 and the outlet cylinder 21, so that the plurality of spiral capillary guide grooves 31 form a passage for the circulation of the refrigerant. Thus, the spiral capillary guide grooves 31 connect the plurality of capillary tubes 22 at the inlet end 10 and the outlet end 20. There can be multiple spiral capillary guide grooves 31, and the number of spiral capillary guide grooves 31 is an integer multiple of the capillary tube 22. Three spiral capillary guide grooves 31 and three capillary tubes 22 are used as an example for explanation, as follows: pure liquid refrigerant enters the inlet cylinder 11 from the conical head end of the inlet cylinder 11, and the three spiral capillary guide grooves 31 are evenly spaced and distributed on the outer surface of the throttling valve core 30, so that the throttling valve core 30 has a liquid separation function and becomes a throttling liquid separation valve core. After the pure liquid refrigerant enters the inlet cylinder 11, it is divided and enters the throttling valve core 30. The three spiral capillary guide grooves 31 are provided, and the liquid refrigerant entering the spiral capillary guide grooves 31 makes a spiral motion along the spiral capillary guide grooves 31. During the spiral motion, the pure liquid refrigerant is converted into a gas-liquid mixed phase refrigerant due to the small cross-sectional area and large flow resistance of the spiral capillary guide grooves 31. The gas-liquid mixed phase refrigerant is evenly mixed under the action of centrifugal force during the spiral motion. The evenly mixed gas-liquid mixed phase refrigerant flows out of the three spiral capillary guide grooves 31 and enters the corresponding three capillaries 22 respectively, thereby completing the throttling and liquid separation process. The spiral capillary guide groove 31 can also be one. When the spiral capillary guide groove 31 is one, the spiral capillary guide groove 31 plays a throttling role instead of a liquid separation role. The pure liquid refrigerant enters the spiral capillary guide groove 31 and is converted into a gas-liquid mixed phase refrigerant. After the spiral motion, it is evenly mixed under the action of centrifugal force. The evenly mixed gas-liquid mixed phase refrigerant is divided and enters the three capillaries 22, achieving a diversion effect, thereby realizing the entire throttling and diversion process.

[0077] like Figure 4A , Figure 5A , Figure 5B and Figure 6As shown, in a further example, the tail end of the throttling valve core 30 has a limiting column 32 and a diverter cavity 33. There are multiple limiting columns 32, and the multiple limiting columns 32 are arranged at intervals along the radial direction of the valve core cavity 12. One end of the limiting column 32 is fixed to the tail end of the throttling valve core 30 and is located between the outlets of two adjacent spiral capillary guide grooves 31, and the other end is against the sealing surface 23, so that a diverter cavity 33 is formed between two adjacent limiting columns 32. One end of the multiple capillaries 22 is inserted into the corresponding diverter cavity 33 and communicated with the corresponding spiral capillary guide groove 31. After the liquid-phase refrigerant is diverted and throttled by the multiple spiral capillary guide grooves 31, it enters the corresponding diverter cavity 33, and the diverter cavities 33 are not connected to each other. The gas-liquid mixed phase refrigerant in each diverter cavity 33 enters the corresponding capillary tube 22 again. In a preferred embodiment, the capillary tube 22 passes through the sealing surface 23 and extends axially for a certain length toward the throttle valve core 30 to ensure the welding effect, thereby forming a capillary tube insertion structure 221 inside the outlet cylinder 21. The axial length of the limiting column 32 is greater than the length of the capillary tube insertion structure 221, and such a design ensures that the liquid flowing into the diversion cavity 33 can flow into the capillary tube 22.

[0078] like Figure 2 As shown, in this example, the refrigerant throttling liquid distributor also includes a filter core 40. The filter core 40 is a conical shape that can fit with the head end of the inlet cylinder 11, and is a stainless steel mesh. The filter core 40 is arranged inside the inlet end 10 and is located on the head end side of the throttling valve core 30. The pure liquid phase refrigerant entering the inlet end 10 is first filtered by the filter core 40 and then enters the spiral capillary guide groove 31 for throttling and liquid separation and other subsequent processes. In this way, impurities in the refrigerant can be filtered out to prevent the spiral capillary guide groove 31 or the capillary tube 22 from being blocked.

[0079] like Figure 7 As shown, there is also a refrigerant throttling and liquid separation method matched with the refrigerant throttling and liquid separation device of the utility model, the steps are as follows:

[0080] Step S1, liquid refrigerant enters the valve core cavity 12 through the inlet end 10;

[0081] Step S2A, the liquid refrigerant entering the valve core chamber 12 is first filtered by the filter core 40;

[0082] Step S2, after the filtration is completed, the liquid refrigerant in the valve core cavity 12 is throttled and converted into a uniform gas-liquid mixed phase through the spiral capillary guide groove 31 on the throttling valve core 30;

[0083] Specifically, the liquid refrigerant in the valve core cavity 12 is divided and throttled into a multi-path gas-liquid mixed uniform phase through a plurality of spiral capillary guide grooves 31 on the throttling valve core 30;

[0084] Step S3, the gas-liquid mixed uniform phase refrigerant after throttling in step S2 is divided and flows into a plurality of throttles at the outlet end 20;

[0085] Specifically, in step S3 , the multi-channel gas-liquid mixed uniform phase refrigerant after being divided and throttled respectively flows into the corresponding multiple throttles at the outlet end 20 .

[0086] In summary, the utility model performs flow diversion by arranging a plurality of spiral capillary guide grooves 31 on the throttling valve core 30, and the spiral capillary guide grooves 31 have a small cross-sectional area, and the pure liquid refrigerant has a large flow resistance after flowing in and is converted into a gas-liquid mixed phase refrigerant, thereby forming a throttling effect, and then enters the corresponding capillary tubes 22 for further throttling and flows into their respective evaporators.

[0087] The utility model is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various variations of the utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation of the utility model, and the utility model shall be protected within the scope defined by the attached claims.

Claims

1. A refrigerant throttling distributor, characterized in that The refrigerant throttling liquid distributor comprises: An inlet end and an outlet end provided with a plurality of throttles, wherein the inlet end and the outlet end are sealed and connected to form a valve core cavity; A throttling valve core is embedded in the valve core cavity. The throttling valve core has at least one spiral capillary guide groove, and the spiral capillary guide groove connects the inlet end and the outlet end.

2. The refrigerant throttling distributor according to claim 1, characterized in that The inlet end has an inlet cylinder; The outlet end also has an outlet cylinder, the multiple throttles are arranged at the tail end of the outlet cylinder, the outlet cylinder is sealed and connected to the inlet cylinder, and the valve core cavity is formed inside.

3. The refrigerant throttling distributor according to claim 2, characterized in that There are a plurality of spiral capillary guide grooves, which are evenly spaced and distributed on the throttling valve core. Each spiral capillary guide groove on the throttling liquid separation valve core is connected to a corresponding throttle.

4. The refrigerant throttling distributor according to claim 3, characterized in that A plurality of the spiral capillary guide grooves are evenly spaced and distributed on the outer surface of the throttling valve core.

5. The refrigerant throttling distributor according to claim 3, characterized in that The tail end of the outlet end is provided with a sealing surface; A plurality of throttles pass through the sealing surface and are communicated with corresponding spiral capillary guide grooves.

6. The refrigerant throttling distributor according to claim 5, characterized in that The tail end of the throttle valve core has: A plurality of limit posts are arranged at intervals along the radial direction of the valve core cavity, one end of each limit post is fixed to the tail end of the throttling valve core and is located between the outlets of two adjacent spiral capillary guide grooves, and the other end of each limit post is against the sealing surface; A plurality of flow-dividing chambers are formed between two adjacent limiting columns. One end of a plurality of throttles passes through the sealing surface and is inserted into the corresponding flow-dividing chamber to communicate with the corresponding spiral capillary guide groove.

7. The refrigerant throttling distributor according to claim 6, characterized in that The throttle is a capillary tube, and the capillary tube passes through the sealing surface and axially extends a certain length in a direction close to the throttle valve core to form a capillary tube extension structure; The axial length of the limiting column is greater than the length of the capillary extending into the structure.

8. The refrigerant throttling distributor according to claim 6, characterized in that The plurality of diversion chambers are not interconnected; The multiple spiral capillary guide grooves are not connected to each other.

9. The refrigerant throttling distributor according to claim 2, characterized in that The refrigerant throttling liquid distributor also includes: The filter core is arranged inside the inlet end and located at the head end side of the throttle valve core.

10. The refrigerant throttling liquid distributor according to claim 4, characterized in that The outer surface of the throttle valve core is seamlessly fitted with the inner surfaces of the inlet cylinder and the outlet cylinder, so that the spiral capillary guide groove forms a passage; And / or, the spiral lines of the plurality of spiral capillary guide grooves are consistent; The number of the spiral capillary guide grooves is an integer multiple of the throttle; And / or, the inlet end has an inlet pipe connected to the inlet cylinder at the inlet end; And / or, the throttle is a capillary tube or an expansion valve.

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