Liquid accumulator and heat pump system

Abstract

According to the liquid storage device and the heat pump system, the liquid storage device comprises a tank body, a liquid inlet and outlet pipeline, a liquid outlet and inlet pipeline and a heat exchanger, the heat exchanger comprises an annular heat exchange pipeline, a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe intersect with the annular heat exchange pipeline; the liquid inlet and outlet pipeline is provided with a U-shaped part, and the suspended end of the U-shaped part is open; the U-shaped part of the liquid inlet and outlet pipeline is positioned in the tank body, and the liquid inlet and outlet pipeline extends out of the tank body; the suspended end of the liquid inlet and outlet pipeline is positioned in the tank body; the annular heat exchange pipeline surrounds the liquid inlet and outlet pipeline and the liquid outlet and inlet pipeline, and the liquid inlet pipe and the liquid outlet pipe extend out of the top of the tank body. The heat exchanger is provided with an annular heat exchange pipeline, and the heat exchange efficiency is improved in the narrow space of the tank body; and meanwhile, the annular pipes are connected in parallel, so that the pressure drop of a refrigerant flowing through the heat regenerator can be effectively reduced, and the overall energy efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to a heat pump system, in particular to a liquid storage device. Background Art

[0002] The current existing technology, Chinese patent CN201822115677.6, is a compressor heat exchange gas-liquid separator. The gas-liquid separator adopts a heat exchange structure, and a heat exchange chamber is arranged around the gas-liquid separation chamber. By circulating a high-temperature refrigerant into the heat exchange chamber, the gas in the gas-liquid separation chamber is heated. On the one hand, the heat can be recycled, and on the other hand, the compressor inlet temperature can be increased to increase the heating temperature of the air source system and reduce the energy loss at the same heating temperature. In addition, by heating the gas-liquid separation chamber, the separated liquid refrigerant can be accelerated to be heated and vaporized before entering the outlet pipe and being discharged from the gas-liquid separation chamber. The problems are: the heat exchange efficiency is low, and the refrigerant pressure drop is large, affecting the system energy efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a liquid storage device which has the characteristics of high heat exchange efficiency.

[0004] The utility model is realized as follows: a liquid storage device, which is special in that it includes a tank body, liquid inlet and outlet pipelines, liquid inlet and outlet pipelines and a heat exchanger.

[0005] The heat exchanger includes an annular heat exchange pipeline, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe intersect with the annular heat exchange pipeline respectively;

[0006] The inlet and outlet liquid pipelines are provided with a U-shaped portion, and the suspended end of the U-shaped portion is open;

[0007] The U-shaped portion of the inlet and outlet liquid pipes is located in the tank body, and the inlet and outlet liquid pipes extend from the top of the tank body; the suspended ends of the inlet and outlet liquid pipes are located in the tank body; the annular heat exchange pipe surrounds the inlet and outlet liquid pipes and the inlet and outlet liquid pipes, and the inlet pipe and the outlet pipe extend from the top of the tank body respectively.

[0008] The special feature of the liquid storage device is that the annular heat exchange pipeline includes a plurality of circular ring tubes arranged in sequence along the axis, and the liquid inlet pipe and the liquid outlet pipe are respectively connected to and communicated with the circular ring tubes.

[0009] The special feature of the liquid storage device is that the liquid inlet pipe and the liquid outlet pipe are on the same diameter line; the liquid inlet and outlet pipelines and the parts of the liquid inlet and outlet pipelines outside the tank are on the same diameter line.

[0010] A heat pump system is characterized in that it comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, an electronic expansion valve, a first one-way valve, a second one-way valve and the liquid reservoir as described above.

[0011] The exhaust end of the compressor is connected to the D end of the four-way valve, the E end of the four-way valve is connected to the indoor heat exchanger, and the C end of the four-way valve is connected to the outdoor heat exchanger. The outdoor heat exchanger, the electronic expansion valve, the second one-way valve and the indoor heat exchanger are connected in sequence; the pipeline between the second one-way valve and the indoor heat exchanger, the liquid inlet pipe, the liquid outlet pipe, and the pipeline between the first one-way valve and the electronic expansion valve and the second one-way valve are connected to form a heat exchange pipeline; the inlet and outlet liquid pipelines are connected to the exhaust port of the compressor, and the inlet and outlet liquid pipelines are connected to the S end of the four-way valve.

[0012] The utility model provides a liquid storage device and a heat exchanger provided with an annular heat exchange pipeline, which improves the heat exchange efficiency in the narrow space of the tank body; at the same time, since the annular pipes are connected in parallel, the pressure drop of the refrigerant flowing through the regenerator can be effectively reduced, thereby improving the overall energy efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional exploded view of the present utility model.

[0014] Figure 2 It is a cross-sectional view of the present utility model.

[0015] Figure 3 yes Figure 2 A-A view of.

[0016] Figure 4 It is a three-dimensional diagram of the present utility model.

[0017] Figure 5 It is a principle diagram of the second embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0020] like Figure 1 、 Figure 2 As shown, a liquid storage device is characterized by comprising a tank body 1, an inlet and outlet liquid pipeline 2, an inlet and outlet liquid pipeline 3 and a heat exchanger 4.

[0021] The heat exchanger 4 includes an annular heat exchange pipeline 41, a liquid inlet pipe 42 and a liquid outlet pipe 43. The liquid inlet pipe 41 and the liquid outlet pipe 42 intersect with the annular heat exchange pipeline 41 respectively.

[0022] The inlet and outlet liquid pipeline 2 is provided with a U-shaped portion 21, and the suspended end of the U-shaped portion 21 is open;

[0023] The U-shaped portion 21 of the liquid inlet and outlet pipelines 2 is located inside the tank body 1, and the liquid inlet and outlet pipelines 2 extend from the top of the tank body 1; the suspended ends of the liquid inlet and outlet pipelines 3 are located inside the tank body 1; the annular heat exchange pipeline 41 surrounds the liquid inlet and outlet pipelines 2 and the liquid inlet and outlet pipelines 3 and is located inside the tank body 1, and the liquid inlet pipe 42 and the liquid outlet pipe 43 extend from the top of the tank body 1 respectively.

[0024] The annular heat exchange pipeline 41 includes a plurality of annular tubes 411 arranged in sequence along the axis, and the liquid inlet pipe 42 and the liquid outlet pipe 43 are respectively connected to and communicated with the annular tubes 411.

[0025] The liquid inlet pipe 42 and the liquid outlet pipe 43 are on the same diameter line; the parts of the liquid inlet and outlet pipelines 2 and the liquid inlet and outlet pipelines 3 located outside the tank body 1 are on the same diameter line.

[0026] Example 2

[0027] like Figure 5 As shown, a heat pump system includes a compressor 5, a four-way valve 6, an indoor heat exchanger 71, an outdoor heat exchanger 72, an electronic expansion valve 8, a first one-way valve 91, a second one-way valve 92 and the liquid reservoir as described above.

[0028] The exhaust end of the compressor 5 is connected to the D end of the four-way valve 6, the E end of the four-way valve 6 is connected to the indoor heat exchanger 71, and the C end of the four-way valve 6 is connected to the outdoor heat exchanger 72. The outdoor heat exchanger 72, the electronic expansion valve 8, the second one-way valve 92 and the indoor heat exchanger 71 are connected in sequence; the pipeline between the second one-way valve 92 and the indoor heat exchanger 71, the liquid inlet pipe 42, the liquid outlet pipe 43, and the pipeline between the first one-way valve 91 and the electronic expansion valve 8 and the second one-way valve 92 are connected to form a heat exchange pipeline; the inlet and outlet liquid pipelines 2 are connected to the exhaust port of the compressor 5, and the inlet and outlet liquid pipelines 3 are connected to the S end of the four-way valve 6.

[0029] In heating mode: Figure 5In the direction of the solid arrow in the middle, the refrigerant is discharged through the exhaust port of the compressor 5, enters the D of the four-way valve 6 into the four-way reversing valve, and enters the indoor heat exchanger 71 from the E end of the four-way valve [the outdoor heat exchanger 71 serves as a condenser], undergoes a condensation process in the indoor heat exchanger 71, enters the annular heat exchange pipeline 41 through the liquid inlet pipe 42, and the higher temperature refrigerant exchanges heat in the tank body 1 and is discharged through the liquid outlet pipe 43, and then enters the electronic expansion valve 8, the outdoor heat exchanger 72 [which absorbs heat as an evaporator], and the S end of the four-way valve through the first one-way valve 91. At this time, the refrigerant becomes a lower temperature refrigerant after the evaporation process, enters the tank body 1 through the inlet and outlet liquid pipelines 3, and exchanges heat with the higher temperature refrigerant in the pipe (the refrigerant in the annular heat exchange pipeline 41) in the tank body 1, and finally returns to the suction port of the compressor 5 through the inlet and outlet liquid pipelines 2.

[0030] In cooling mode: Figure 5 In the direction of the hollow arrow, the refrigerant passes through the exhaust port of the compressor 5, enters the four-way valve 5 through the D end of the four-way valve, and enters the outdoor heat exchanger 72 from the C port of the four-way valve. It undergoes a condensation process in the outdoor heat exchanger 72, and after throttling through the electronic expansion valve 8, enters the indoor heat exchanger 71 through the second one-way valve 92 to undergo an evaporation process, then passes through the four-way valve, and after coming out of the four-way valve, enters the tank body 1 through the inlet and outlet liquid pipes 3, and then enters the return air port of the compressor through the inlet and outlet liquid pipes 2.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid reservoir, characterized in that: Including tank body, inlet and outlet liquid pipelines, inlet and outlet liquid pipelines and heat exchanger, The heat exchanger includes an annular heat exchange pipeline, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe intersect with the annular heat exchange pipeline respectively; The inlet and outlet liquid pipelines are provided with a U-shaped portion, and the suspended end of the U-shaped portion is open; The U-shaped portion of the inlet and outlet liquid pipelines is located in the tank body, and the inlet and outlet liquid pipelines extend from the top of the tank body; the suspended ends of the inlet and outlet liquid pipelines are located in the tank body; the annular heat exchange pipeline surrounds the inlet and outlet liquid pipelines and the inlet and outlet liquid pipelines, and the inlet pipe and the outlet pipe extend from the top of the tank body respectively.

2. A liquid storage device according to claim 1, characterized in that: The annular heat exchange pipeline includes a plurality of annular tubes arranged in sequence along an axis, and a liquid inlet pipe and a liquid outlet pipe are respectively connected to and communicated with the annular tubes.

3. The liquid storage device according to claim 1, characterized in that: The liquid inlet pipe and the liquid outlet pipe are on the same diameter line; the liquid inlet and outlet pipelines and the parts of the liquid inlet and outlet pipelines located outside the tank body are on the same diameter line.

4. A heat pump system comprising a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, an electronic expansion valve, a first one-way valve, a second one-way valve, and a liquid reservoir according to any one of claims 1 to 3, The exhaust end of the compressor is connected to the D end of the four-way valve, the E end of the four-way valve is connected to the indoor heat exchanger, and the C end of the four-way valve is connected to the outdoor heat exchanger. The outdoor heat exchanger, the electronic expansion valve, the second one-way valve and the indoor heat exchanger are connected in sequence; the pipeline between the second one-way valve and the indoor heat exchanger, the liquid inlet pipe, the liquid outlet pipe, and the pipeline between the first one-way valve and the electronic expansion valve and the second one-way valve are connected to form a heat exchange pipeline; the inlet and outlet liquid pipelines are connected to the exhaust port of the compressor, and the inlet and outlet liquid pipelines are connected to the S end of the four-way valve.

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