Pipeline valve, pipeline structure, heat exchanger and air conditioner

Abstract

The invention provides a pipeline valve, a pipeline structure, a heat exchanger and an air conditioner, relates to the technical field of air conditioners, and solves the technical problem that in the prior art, a heat exchanger cannot realize that different flow paths are used in refrigerating and heating modes, so that the system performance is not ideal. The pipeline valve is provided with a pipeline cavity, and a first outlet, a second outlet and a third outlet which are communicated with the pipeline cavity; a valve element, a sliding channel and a connecting channel are arranged in the pipeline cavity, the connecting channel is used for communicating the first outlet with the second outlet, and the sliding channel is used for communicating the first outlet with the third outlet; the valve element is matched with the sliding channel, and the valve element moves in the sliding channel in a reciprocating mode and is used for sealing the first outlet or the third outlet. When the first outlet is closed by the valve core, the second outlet and the third outlet are communicated by the sliding channel; when the valve element seals the third outlet, the first outlet and the second outlet are communicated through the connecting channel. The invention provides the pipeline valve capable of improving the system performance of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a pipeline valve, a pipeline structure, a heat exchanger and an air conditioner. Background Art

[0002] When designing a heat exchanger, air conditioning system designers often need to optimize the number of branches. The number of branches in a heat exchanger affects the mass flow rate of the refrigerant, which in turn is related to the heat transfer coefficient and pressure loss of the refrigerant. If there are fewer branches, the refrigerant flow rate is large, the heat transfer coefficient is large, and the pressure loss increases; if there are more branches, the refrigerant flow rate is small, the heat transfer coefficient is small, and the pressure loss decreases. To achieve a better heat exchange effect, the heat transfer coefficient of the refrigerant should be increased as much as possible and its pressure loss should be reduced. This requires designers to comprehensively consider the influence of these two aspects when designing the number of branches to find an optimal value. However, the optimal number of branches for cooling mode and heating mode is often inconsistent. Since the working conditions of the heat exchanger under cooling and heating are different, more branches are often beneficial to the cooling energy efficiency, but not to the heating performance. Summary of the invention

[0003] The purpose of the present invention is to provide a pipeline valve, a pipeline structure, a heat exchanger and an air conditioner to solve the technical problem that the heat exchanger in the prior art cannot use different flow paths for cooling and heating modes, resulting in unsatisfactory system performance. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The pipeline valve provided by the present invention comprises a pipeline chamber and a first outlet, a second outlet and a third outlet communicating with the pipeline chamber;

[0006] The pipeline chamber is provided with a valve core, a sliding channel and a connecting channel, the connecting channel is used to connect the first outlet and the second outlet, and the sliding channel is used to connect the first outlet and the third outlet;

[0007] The valve core is adapted to the sliding channel, and the valve core reciprocates in the sliding channel to close the first outlet or the third outlet;

[0008] When the valve core closes the first outlet, the sliding channel connects the second outlet and the third outlet;

[0009] When the valve core closes the third outlet, the connecting passage and the sliding passage communicate with the first outlet and the second outlet.

[0010] Preferably, the first outlet and the second outlet are on the same axis, and the third outlet is arranged between the first outlet and the second outlet and is arranged perpendicular to the first outlet.

[0011] Preferably, the connecting channel is surrounded by the periphery of the sliding channel and is communicated with the sliding channel.

[0012] Preferably, the valve core is a spherical structure, and the sliding channel is a tubular channel matched with the valve core.

[0013] A pipeline structure comprises the pipeline valve as described above.

[0014] Preferably, it includes a first connecting pipeline, which includes four groups of pipeline valves, and the four groups of pipeline valves are connected in sequence. Among two adjacent pipeline valves, the third outlet of the first pipeline valve is connected to the first outlet of the second pipeline valve through a pipeline.

[0015] Preferably, the pipeline structure also includes a second connecting pipeline, which includes four groups of pipeline valves, and the four groups of pipeline valves are connected in sequence. Among two adjacent pipeline valves, the first outlet of the first pipeline valve is connected to the third outlet of the second pipeline valve through a pipeline.

[0016] A heat exchanger comprises the pipeline structure as described above.

[0017] Preferably, it comprises a double-row fin-tube heat exchanger body, at least two first connecting pipelines, at least one second connecting pipeline and a plurality of U-shaped tubes, wherein:

[0018] The first connecting pipeline includes four groups of pipeline valves, which are connected in sequence. Among two adjacent pipeline valves, the third outlet of the first pipeline valve is connected to the first outlet of the second pipeline valve through a pipeline.

[0019] The second connecting pipeline includes four groups of pipeline valves, which are connected in sequence. Among two adjacent pipeline valves, the first outlet of the first pipeline valve is connected to the third outlet of the second pipeline valve through a pipeline.

[0020] At least one of the first connecting pipelines is connected to the four second outlets, and the four pipelines are respectively connected to the two rows of interfaces of the heat exchanger body, the pipeline connected to the first outlet is connected to the refrigerant inlet pipe, and the pipeline connected to the third outlet is connected to the refrigerant outlet pipe;

[0021] At least one of the second connecting pipelines is connected between at least two of the first connecting pipelines, and at least one of the second connecting pipelines is connected to the four pipelines on the four second outlets, respectively connected to two adjacent rows of interfaces of the heat exchanger body, the pipeline connected to the first outlet is connected to the refrigerant outlet pipe, and the pipeline connected to the third outlet is connected to the refrigerant inlet pipe;

[0022] The other interfaces on the double-row fin-tube heat exchanger body are connected via U-shaped tubes.

[0023] An air conditioner comprises the heat exchanger as described above.

[0024] The beneficial effects of the present invention are as follows: the pipeline valve, pipeline structure, heat exchanger and air conditioner provided by the present invention include a valve body, the valve body having a pipeline chamber, a first outlet, a second outlet and a third outlet, the pipeline chamber is provided with a valve core, a sliding channel and a connecting channel, the connecting channel is used to connect the first outlet and the second outlet, the sliding channel is used to connect the first outlet and the third outlet, the valve core is arranged in the sliding channel, and can move back and forth in the sliding channel, so as to close the first outlet or the third outlet, when the valve core closes the first outlet, the second outlet and the third outlet are connected through the connecting channel and the sliding channel, and the refrigerant can be discharged from the third outlet when entering from the second outlet; and when the valve core closes the third outlet, the first outlet and the second outlet can be connected through the connecting channel, and the refrigerant can be discharged from the second outlet when entering from the first outlet, so that the pipeline valve provided by the present invention can change the flow direction of the refrigerant by changing the entry position of the refrigerant, complete the switching of the refrigerant flow path, and thus improve the performance of the heat exchanger system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the pipeline valve of the present invention;

[0027] Figure 2 1 is a schematic diagram of the structure of the first connecting pipeline of the present invention (I);

[0028] Figure 3 Schematic diagram of the structure of the first connecting pipeline of the present invention (II);

[0029] Figure 4 is a structural schematic diagram of the second connecting pipeline of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the heat exchanger body of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the heat exchanger of the present invention;

[0032] Figure 7 It is a schematic diagram of the flow path of the heat exchanger in the cooling mode of the present invention;

[0033] Figure 8 is a schematic diagram of the flow path of the heat exchanger in the heating mode of the present invention;

[0034] Fig. 9 It is a schematic diagram of the flow paths of the heat exchanger in cooling mode and heating mode of the present invention.

[0035] In the figure:

[0036] 100, pipeline valve; 200, first connecting pipeline; 300, second connecting pipeline; 400, heat exchanger body;

[0037] 110, pipeline chamber; 120, first outlet; 130, second outlet; 140, third outlet; 150, valve core; 160, sliding channel; 170, connecting channel;

[0038] 410, cooling inlet pipe (heating outlet pipe); 420, heating inlet pipe (cooling outlet pipe); 430, U-shaped pipe;

[0039] a, b, c, d, e, f, connection ports. DETAILED DESCRIPTION

[0040] Please refer to the attached figure below Figures 1 to 9And the text content understands the content of the present invention and the difference between the present invention and the prior art. The following is a further detailed description of the technical solution (including the preferred technical solution) of the present invention by means of the accompanying drawings and the enumeration of some optional embodiments of the present invention. It should be noted that: any technical feature and any technical solution in the present embodiment are one or more of a variety of optional technical features or optional technical solutions. In order to describe the need for brevity, it is impossible to exhaustively list all the alternative technical features and alternative technical solutions of the present invention in this document, and it is not convenient for the implementation of each technical feature to emphasize that it is one of the multiple optional implementations, so those skilled in the art should know that: any technical means provided by the present invention can be replaced or any two or more technical means or technical features provided by the present invention can be combined with each other to obtain a new technical solution. Any technical feature and any technical solution in the present embodiment do not limit the scope of protection of the present invention. The scope of protection of the present invention should include any alternative technical solutions that can be thought of by those skilled in the art without creative work and new technical solutions obtained by combining any two or more technical means or technical features provided by the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] The present invention provides a pipeline valve, a pipeline structure, a heat exchanger and an air conditioner which can change the flow direction of the refrigerant by changing the entry position of the refrigerant, complete the switching of the refrigerant flow path, and thus improve the performance of the heat exchanger system.

[0044] Combine the following Figures 1 to 9The technical solution provided by the present invention is described in more detail.

[0045] The present invention provides a pipeline valve 100, such as Figure 1 As shown, the pipeline valve 100 has a pipeline chamber 110 and a first outlet 120, a second outlet 130 and a third outlet 140 connected to the pipeline chamber 110;

[0046] The pipeline chamber 110 is provided with a valve core 150, a sliding channel 160 and a connecting channel 170, the connecting channel 170 is used to connect the first outlet 120 and the second outlet 130, and the sliding channel 160 is used to connect the second outlet 130 and the third outlet 140;

[0047] The valve core 150 is adapted to the sliding channel 160 , and the valve core 150 reciprocates in the sliding channel 160 to close the first outlet 120 or the third outlet 140 ;

[0048] When the valve core 150 closes the first outlet 120 , the sliding channel 160 connects the second outlet 130 and the third outlet 140 ;

[0049] When the valve core 150 closes the third outlet 140 , the connecting passage 170 connects the first outlet 120 and the second outlet 130 .

[0050] The pipeline valve 100 provided by the present invention has a pipeline chamber 110, a first outlet 120, a second outlet 130 and a third outlet 140. The pipeline chamber 110 is provided with a valve core 150, a sliding channel 160 and a connecting channel 170. The connecting channel 170 is used to connect the first outlet 120 and the second outlet 130. The sliding channel 160 is used to connect the first outlet 120 and the third outlet 140. The valve core 150 is arranged in the sliding channel 160 and can reciprocate in the sliding channel 160, so as to close the first outlet 120 or the third outlet 140. When the valve core 150 is closed, the valve core 150 is closed. When the first outlet 120 is closed, the second outlet 130 and the third outlet 140 are connected through the connecting channel 170 and the sliding channel 160, and the refrigerant can be discharged from the third outlet 140 when it enters from the second outlet 130; and when the valve core 150 closes the third outlet 140, the first outlet 120 and the second outlet 130 can be connected through the connecting channel 170, and the refrigerant can be discharged from the second outlet 130 when it enters from the first outlet 120, so that the pipeline valve 100 provided by the present invention can change the flow direction of the refrigerant by changing the entry position of the refrigerant, complete the switching of the refrigerant flow path, and thus improve the performance of the heat exchanger system.

[0051] It should be noted that by adopting multiple sets of pipeline valves 100 and connecting them through pipelines, it is possible to switch more refrigerant flow paths, so that different branches can be achieved when used in cooling and heating modes, and there is no problem of mutual restriction between cooling and heating modes. The performance of the heat exchanger can be maximized, and the energy efficiency of the air-conditioning system can be effectively improved.

[0052] In some embodiments of the present invention, the first outlet 120 and the second outlet 130 are on the same axis, the third outlet 140 is disposed between the first outlet 120 and the second outlet 130 , and the third outlet 140 is disposed perpendicular to the first outlet 120 .

[0053] In some of the above embodiments of the present invention, the first outlet 120 and the second outlet 130 are on the same axis, and the third outlet 140 is arranged perpendicular to the first outlet 120. Since the sliding channel 160 is connected between the first outlet 120 and the third outlet 140, when the refrigerant flows in from the first outlet 120, the refrigerant can drive the valve core 150 to move to the third outlet 140 and block the third outlet 140, so that the refrigerant can flow in from the first outlet 120 and flow out from the second outlet 130; when the refrigerant flows in from the second outlet 130, the refrigerant can drive the valve core 150 to move to the first outlet 120 and block the first outlet 120, so that the refrigerant can flow in from the second outlet 130 and flow out from the third outlet 140.

[0054] In specific applications, the first outlet 120 is connected to the refrigerant inlet pipe, the second outlet 130 and the third outlet 140 are respectively connected to the heat exchanger body 400, and the refrigerant entering the first outlet 120 enters the heat exchanger body 400 via the second outlet 130 to form a flow path; while the refrigerant enters via the second outlet 130, it can enter the heat exchanger body 400 from the third outlet 140, so that the flow path of the heat exchanger can be reasonably set according to needs to achieve different combinations and switching of the flow paths.

[0055] In some embodiments of the present invention, the connecting channel 170 is surrounded by the periphery of the sliding channel 160 and is communicated with the sliding channel 160 .

[0056] In some of the above-mentioned embodiments of the present invention, the connecting channel 170 is enclosed in the periphery of the sliding channel 160. When the refrigerant flows in from the first outlet 120, the refrigerant can drive the valve core 150 to move toward the third outlet 140. At the same time, the refrigerant flows directly to the second outlet 130 along the connecting channel 170, ensuring that the refrigerant can pass through in time, effectively ensuring the smooth circulation of the refrigerant; secondly, when the refrigerant flows in from the second outlet 130, the refrigerant drives the valve core 150 to move toward the first outlet 120. At this time, the refrigerant entering the second outlet 130 directly flows out from the third outlet 140, and the refrigerant circulates smoothly, effectively ensuring the use effect of the heat exchanger.

[0057] In some embodiments of the present invention, the valve core 150 is a spherical structure, and the sliding channel 160 is a tubular channel that matches the valve core 150. The valve core 150 is a spherical structure, and the sliding channel 160 is a tubular channel that matches the valve core 150. The valve core 150 can reciprocate more smoothly in the sliding channel 160, thereby effectively ensuring the smooth switching of the refrigerant flow path.

[0058] The present invention further provides a pipeline structure, comprising the pipeline valve 100 as described above.

[0059] In some embodiments of the present invention, Figure 2-Figure 3 As shown, the pipeline structure includes a first connecting pipeline 200, and the first connecting pipeline 200 includes four groups of pipeline valves 100. The four groups of pipeline valves 100 are connected in sequence. Among two adjacent pipeline valves 100, the third outlet 140 of the first pipeline valve 100 is connected to the first outlet 120 of the second pipeline valve 100 through a pipeline.

[0060] In some of the above embodiments of the present invention, the pipeline structure includes a first connecting pipeline 200, the first connecting pipeline 200 includes four groups of pipeline valves 100, the four groups of pipeline valves 100 are connected in sequence, and in two adjacent pipeline valves 100, the third outlet 140 of the first pipeline valve 100 is connected to the first outlet 120 of the second pipeline valve 100 through a pipeline. After the four groups of pipeline valves 100 are connected, six liquid inlet pipelines are formed, which are four pipelines connected to the four second outlets 130, a pipeline connected to the first outlet 120 of the first group of pipeline valves 100, and a pipeline connected to the third outlet 140 of the fourth group of pipeline valves 100.

[0061] In some embodiments of the present invention, Figure 4As shown, the pipeline structure also includes a second connecting pipeline 300, which includes four groups of pipeline valves 100. The four groups of pipeline valves 100 are connected in sequence. Among two adjacent pipeline valves 100, the first outlet 120 of the first pipeline valve 100 is connected to the third outlet 140 of the second pipeline valve 100 through a pipeline.

[0062] In some of the above embodiments of the present invention, the second connecting pipeline 300 includes four groups of pipeline valves 100, which are connected in sequence. In two adjacent pipeline valves 100, the first outlet 120 of the first pipeline valve 100 is connected to the third outlet 140 of the second pipeline valve 100 through a pipeline. After the four groups of pipeline valves 100 are connected, six liquid inlet pipelines are formed, which are four pipelines connected to the four second outlets 130, a pipeline connected to the first outlet 120, and a pipeline connected to the third outlet 140.

[0063] For ease of understanding, the connection ports of the four pipelines connected to the second outlets 130 of the four pipeline valves 100 on the first connecting pipeline 200 and the second connecting pipeline 300, the pipeline connected to the first outlet 120 of the first group of pipeline valves 100, and the pipeline connected to the third outlet 140 of the fourth group of pipeline valves 100 are marked as a, b, c, d, e, and f, respectively. The six connection ports are connected by a number of pipelines to form two communication modes.

[0064] For the first connecting pipeline 200, the refrigerant enters the first connecting pipeline 200 from b, d, and e, and flows out from a, c, and f; the refrigerant flows in from a and c, and flows out from b and d, and the refrigerant does not flow through e and f.

[0065] For the second connecting pipeline 300, the refrigerant enters the second connecting pipeline 300 from b and d, flows out from a and c, and the refrigerant does not flow through e and f; the refrigerant flows in from a, c and f, and flows out from e, b and d.

[0066] The present invention also provides a heat exchanger, comprising the pipeline structure as described above.

[0067] In the heat pump system, the refrigerant has two flow directions: cooling and heating. The first connecting pipeline 200 can automatically switch the connection mode of the internal pipe according to the refrigerant flow direction of the system: in the cooling mode, the flow is downward, and the refrigerant enters the device from b, d, and e, and flows out from a, c, and f; in the heating mode, the flow direction is the opposite, the refrigerant flows in from a and c, and flows out from b and d, and the refrigerant does not flow through e and f.

[0068] The second connecting pipeline 300 can automatically switch the connection mode of the internal pipe according to the refrigerant flow direction of the system: in cooling mode, the flow is downward, the refrigerant enters the device from b and d, and flows out from a and c, and no refrigerant flows through e and f; the flow direction in heating mode is the opposite, the refrigerant flows in from a, c, and f, and flows out from e, b, and d.

[0069] The heat exchanger provided by the present invention includes a double-row fin-tube heat exchanger body 400 and the pipeline structure as described above.

[0070] Specifically, it includes a double-row fin-tube heat exchanger body 400, at least two first connecting pipelines 200, at least one second connecting pipeline 300 and a plurality of U-shaped tubes 430, wherein:

[0071] The first connecting pipeline 200 includes four groups of pipeline valves 100, which are connected in sequence. In two adjacent pipeline valves 100, the third outlet 140 of the first pipeline valve 100 is connected to the first outlet 120 of the second pipeline valve 100 through a pipeline.

[0072] The second connecting pipeline 300 includes four groups of pipeline valves 100, which are connected in sequence. In two adjacent pipeline valves 100, the first outlet 120 of the first pipeline valve 100 is connected to the third outlet 140 of the second pipeline valve 100 through a pipeline.

[0073] At least one first connecting pipeline 200 is connected to the four second outlets 130, and the four pipelines are respectively connected to the two rows of interfaces of the heat exchanger body 400, the pipeline connected to the first outlet 120 is connected to the refrigerant inlet pipe, and the pipeline connected to the third outlet 140 is connected to the refrigerant outlet pipe;

[0074] At least one second connecting pipeline 300 is connected between at least two first connecting pipelines 200, and at least one second connecting pipeline 300 is connected to four pipelines on the four second outlets 130, respectively connected to two adjacent rows of interfaces of the heat exchanger body 400, the pipeline connected to the first outlet 120 is connected to the refrigerant outlet pipe, and the pipeline connected to the third outlet 140 is connected to the refrigerant inlet pipe;

[0075] Other interfaces on the double-row fin-tube heat exchanger body 400 are connected via U-shaped tubes 430 .

[0076] The heat exchanger provided by the present invention, by adopting the first connecting pipeline 200 and the second connecting pipeline 300, can rationally set the flow path according to the quantity requirements of the heating mode and the cooling mode for different branches, and can automatically realize the switching of the cooling mode and the heating mode according to the flow direction of the refrigerant, saving additional control valves and reducing the use cost; the cooling and heating modes can be set according to the optimal flow path without restricting each other, with strong versatility and more flexible design.

[0077] For ease of understanding, first connect a, b, c, d of the first connecting pipeline 200 to the four interfaces on the double-row heat exchanger body 400 respectively, connect e to the refrigerant inlet pipe, and connect f to the refrigerant outlet pipe.

[0078] In the cooling mode, the refrigerant enters the pipeline valve 100 from the e port of the first connecting pipeline 200, that is, enters from the first outlet 120 of the first pipeline valve 100, the valve core 150 moves toward the third outlet 140 to close the third outlet 140, the refrigerant flows out from the second outlet 130, and then flows to a, enters the double-row heat exchanger body 400 from a for circulation, and then flows out through d, d is connected to the second outlet 130 of the fourth pipeline valve 100, that is, enters from the second outlet 130 of the fourth pipeline valve 100, the valve core 150 moves toward the first outlet 120 to close the first outlet 120, the refrigerant flows out from the third outlet 140, and then flows to f, enters the refrigerant outlet pipe, and completes the first section of the refrigerant flow path.

[0079] After the refrigerant on the double-row heat exchanger body 400 enters the heat exchanger body 400 from the refrigeration inlet pipe, it flows into the pipeline valve 100 through b, and b is connected to the second outlet 130 of the second pipeline valve 100. After the refrigerant flows into the second pipeline valve 100 from the second outlet 130, it flows out from the third outlet 140, and the third outlet 140 of the second pipeline valve 100 is connected to the first outlet 120 of the third pipeline valve 100, so that the refrigerant enters the third pipeline valve 100 through the first outlet 120 of the third pipeline valve 100, and then flows out from the second outlet 130 of the third pipeline valve 100, that is, flows to c, and continues to flow into the double-row heat exchanger body 400 through c, and is discharged from the interface on the double-row heat exchanger body 400, completing the second section of the refrigerant flow path.

[0080] For example, Figure 5 Shows an axonometric view of a fin-tube heat exchanger with 2 rows of 24 holes. Figure 5 It can be seen that the heat exchanger body 400 has two rows of interfaces, each row has 24 interfaces, and every two interfaces at one end are connected by a U-shaped tube 430, that is, each row has 12 U-shaped tubes 430. Figure 5 The right side of the heat exchanger body 400 is in a state where the U-shaped tubes 430 are not connected to each other.

[0081] For ease of explanation, the holes of the heat exchanger body 400 are named from left to right and from top to bottom, such as the top hole on the left is 1-1 and the bottom hole on the right is 2-24.

[0082] like Figure 6 As shown, the heat exchanger uses the first connecting pipeline 200 at three locations and the second connecting pipeline 300 at two locations.

[0083] The first connecting pipeline 200 is installed as follows: hole 1-6 (1-12, 1-18) is connected to port a, 1-7 (1-13, 1-19) is connected to port b, 2-6 (2-12, 2-18) is connected to port d, 2-7 (2-13, 2-19) is connected to port c, port e is connected to the inlet pipe in the cooling mode, and port f is connected to the outlet pipe in the cooling mode.

[0084] The second connecting pipe 300 is installed in the same way: hole 1-8 (1-16) is connected to port a, 1-9 (1-17) is connected to port b, 2-8 (2-16) is connected to port d, 2-9 (2-17) is connected to port c, port e is connected to the outlet pipe in the heating mode, and port f is connected to the inlet pipe in the heating mode. In addition, hole 1-24 is connected to the cooling inlet pipe (heating outlet pipe) 410, and hole 2-24 is connected to the heating inlet pipe (cooling outlet pipe) 420.

[0085] The remaining parts are connected by small elbows. After installation in the above manner, the flow path state of the heat exchanger in cooling and heating modes is as follows Figure 7-Figure 9 As shown, Fig. 9 In (○ indicates inflow, × indicates outflow).

[0086] In this example, a, b, c, and d of the first group of first connecting pipelines 200 are respectively connected to four interfaces on the double-row heat exchanger body 400, e is connected to the refrigerant inlet pipe, and f is connected to the refrigerant outlet pipe.

[0087] In the cooling mode, the refrigerant enters the pipeline valve 100 from the e port, that is, enters from the first outlet 120 of the first pipeline valve 100, the valve core 150 moves toward the third outlet 140 to close the third outlet 140, the refrigerant flows out from the second outlet 130, and then flows to a, enters the double-row heat exchanger body 400 from a for circulation, and then flows out through d, d is connected to the second outlet 130 of the fourth pipeline valve 100, that is, enters from the second outlet 130 of the fourth pipeline valve 100, the valve core 150 moves toward the first outlet 120 to close the first outlet 120, the refrigerant flows out from the third outlet 140, and then flows to f, enters the refrigerant outlet pipe, and completes the first section of the refrigerant flow path.

[0088] The refrigerant entering the pipeline valve 100 from the e port of the second group of first connecting pipelines 200 enters from the first outlet 120 of the first pipeline valve 100, and the valve core 150 moves toward the third outlet 140 to close the third outlet 140. The refrigerant flows out from the second outlet 130 and then flows to a. From a, it enters the double-row heat exchanger body 400 for internal circulation and then enters the second connecting pipeline 300 through b of the first group of second connecting pipelines 300, and then flows to a; after circulating through the double-row heat exchanger body 400, it enters b of the first group of first connecting pipelines 200 and flows to c of the first group of first connecting pipelines 200, and then flows to d of the first group of second connecting pipelines 300, and flows from d of the second connecting pipeline 300 to c, and then circulates through the double-row heat exchanger body 400 and returns to f of the second group of first connecting pipelines 200 to be discharged to the refrigerant outlet pipe, completing the second section of the refrigerant flow path.

[0089] Similarly, the refrigerant enters the third group of first connecting pipelines 200 from e, and then is discharged to the refrigerant outlet pipe from f of the third group of first connecting pipelines 200, completing the third section of the refrigerant flow path.

[0090] After the refrigerant on the double-row heat exchanger body 400 enters the heat exchanger body 400 from the refrigeration inlet pipe, it flows into the pipeline valve 100 through b, and b is connected to the second outlet 130 of the second pipeline valve 100. After the refrigerant flows into the second pipeline valve 100 from the second outlet 130, it flows out from the third outlet 140, and the third outlet 140 of the second pipeline valve 100 is connected to the first outlet 120 of the third pipeline valve 100, so that the refrigerant enters the third pipeline valve 100 through the first outlet 120 of the third pipeline valve 100, and then flows out from the second outlet 130 of the third pipeline valve 100, that is, flows to c, continues to flow into the double-row heat exchanger body 400 through c, and is discharged from the interface on the double-row heat exchanger body 400, completing the fourth section of the refrigerant flow path.

[0091] In the heating mode, the refrigerant enters from f of the first group of second connecting pipes 300, flows to d, and then flows to c of the first group of first connecting pipes 200, c of the first group of first connecting pipes 200 flows to d, and then flows to a of the first group of first connecting pipes 200 through the double-row heat exchanger body 400, a of the first group of first connecting pipes 200 flows to b of the first group of first connecting pipes 200, and then flows to a of the first group of second connecting pipes 300 through the double-row heat exchanger body 400, and is discharged through e of the first group of second connecting pipes 300, completing the first section of the refrigerant flow path.

[0092] Similarly, the refrigerant enters from f of the second group of second connecting pipelines 300, flows to d, and then flows to c of the second group of first connecting pipelines 200, c of the second group of first connecting pipelines 200 flows to d, and then flows to c of the first group of second connecting pipelines 300 through the double-row heat exchanger body 400, c of the first group of second connecting pipelines 300 flows to b of the first group of second connecting pipelines 300, and then flows to a of the second group of first connecting pipelines 200 through the double-row heat exchanger body 400, flows to a of the second group of second connecting pipelines 300 through b of the second group of first connecting pipelines 200, and a of the second group of second connecting pipelines 300 flows to e, completing the second section of the refrigerant flow path.

[0093] Furthermore, after the refrigerant on the double-row heat exchanger body 400 enters the heat exchanger body 400 from the heating inlet pipe, it flows to c of the third group of first connecting pipes 200, c of the third group of first connecting pipes 200 flows to d of the third group of first connecting pipes 200, d of the third group of first connecting pipes 200 flows to c of the second group of second connecting pipes 300, and then flows to b of the second group of second connecting pipes 300 through c of the second group of second connecting pipes 300, and then flows to a of the third group of first connecting pipes 200, a flows to b, and then is discharged from the heating outlet pipe on the double-row heat exchanger body 400, completing the third section of the refrigerant flow path.

[0094] It can be seen that the heat exchanger has a 4-way flow path in cooling mode and automatically changes to a 3-way flow path in heating mode. Figure 7-Figure 9 It can be seen that after the refrigerant of each flow path enters the heat exchanger body 400, it flows upward through the U-shaped pipe 430 and the elbow, returns to the second row after reaching the top of the flow path, and then flows downward to the flow path outlet. The first connecting pipe 200 is installed at each inlet and outlet position of the cooling flow path, and the second connecting pipe 300 is installed at each inlet and outlet position of the heating flow path.

[0095] Because the bottom interfaces 1-24 and 2-24 are shared by cooling and heating, the number of first connecting pipes 200 used = the number of flow paths required for cooling - 1, and the number of second connecting pipes 300 used = the number of flow paths required for heating - 1. Designers can design the flow paths by themselves by using the first connecting pipe 200 and the second connecting pipe 300. When cooling and heating use different branches, there will be no problem of mutual restriction, which provides more possibilities for designers to design flow paths, can maximize the performance of the heat exchanger, and effectively improve the energy efficiency of the air conditioning system.

[0096] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pipeline valve, characterized in that: The pipeline valve has a pipeline chamber and a first outlet, a second outlet and a third outlet connected to the pipeline chamber; The pipeline chamber is provided with a valve core, a sliding channel and a connecting channel, the connecting channel is used to connect the first outlet and the second outlet, and the sliding channel is used to connect the first outlet and the third outlet; The valve core is adapted to the sliding channel, and the valve core reciprocates in the sliding channel to close the first outlet or the third outlet; When the valve core closes the first outlet, the sliding channel connects the second outlet and the third outlet; When the valve core closes the third outlet, the connecting passage and the sliding passage communicate with the first outlet and the second outlet.

2. The pipeline valve according to claim 1, characterized in that: The first outlet and the second outlet are on the same axis, and the third outlet is arranged between the first outlet and the second outlet and is arranged perpendicular to the first outlet.

3. The pipeline valve according to claim 2, characterized in that: The connecting channel is surrounded by the periphery of the sliding channel and is communicated with the sliding channel.

4. The pipeline valve according to claim 1, characterized in that: The valve core is a spherical structure, and the sliding channel is a circular tubular channel matched with the valve core.

5. A pipeline structure, characterized in that: It comprises a pipeline valve as described in any one of claims 1-4.

6. The pipeline structure according to claim 5, characterized in that: It comprises a first connecting pipeline, which comprises four groups of pipeline valves, which are connected in sequence, and in two adjacent pipeline valves, the third outlet of the first pipeline valve is connected to the first outlet of the second pipeline valve through a pipeline.

7. The pipeline structure according to claim 5, characterized in that: The pipeline structure also includes a second connecting pipeline, which includes four groups of pipeline valves. The four groups of pipeline valves are connected in sequence. Among two adjacent pipeline valves, the first outlet of the first pipeline valve is connected to the third outlet of the second pipeline valve through a pipeline.

8. A heat exchanger, characterized in that: It comprises a pipeline structure as described in any one of claims 5-7.

9. The heat exchanger according to claim 8, characterized in that It includes a double-row fin-tube heat exchanger body, at least two first connecting pipelines, at least one second connecting pipeline and a plurality of U-shaped tubes, wherein: The first connecting pipeline includes four groups of pipeline valves, which are connected in sequence. Among two adjacent pipeline valves, the third outlet of the first pipeline valve is connected to the first outlet of the second pipeline valve through a pipeline. The second connecting pipeline includes four groups of pipeline valves, which are connected in sequence. Among two adjacent pipeline valves, the first outlet of the first pipeline valve is connected to the third outlet of the second pipeline valve through a pipeline. At least one of the first connecting pipelines is connected to the four second outlets, and the four pipelines are respectively connected to the two rows of interfaces of the heat exchanger body, the pipeline connected to the first outlet is connected to the refrigerant inlet pipe, and the pipeline connected to the third outlet is connected to the refrigerant outlet pipe; At least one of the second connecting pipelines is connected between at least two of the first connecting pipelines, and at least one of the second connecting pipelines is connected to the four pipelines on the four second outlets, respectively connected to two adjacent rows of interfaces of the heat exchanger body, the pipeline connected to the first outlet is connected to the refrigerant outlet pipe, and the pipeline connected to the third outlet is connected to the refrigerant inlet pipe; The other interfaces on the double-row fin-tube heat exchanger body are connected via U-shaped tubes.

10. An air conditioner, characterized in that: Comprising a heat exchanger as claimed in claim 8 or 9.

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