Two-way energy-saving liquid accumulator of heat pump system

Abstract

The utility model relates to the technical field of heat pump systems, in particular to a two-way energy-saving liquid storage device of a heat pump system, which comprises a liquid storage tank, the liquid storage tank is used for storing refrigerants, a first conveying pipe extending up and down is arranged in the liquid storage tank, the first conveying pipe is defined to be located on the left side of the liquid storage tank, and a second conveying pipe is parallelly arranged at the right end of the first conveying pipe. A U-shaped pipe is arranged between the first conveying pipe and the second conveying pipe, the left end and the right end of the U-shaped pipe are fixedly connected with the first conveying pipe and the second conveying pipe respectively, and a first one-way valve is arranged at the right end of the U-shaped pipe. The lower end of the second conveying pipe is provided with a third one-way valve, and the second one-way valve and the third one-way valve are both located below the U-shaped pipe. According to the heat pump system, the U-shaped pipe and the one-way valve are arranged between the two conveying pipes, so that when the heating working condition of the heat pump system is converted into the refrigerating working condition, a refrigerant can flow out of the liquid storage tank through the U-shaped pipe, the situation that the refrigerant enters the liquid storage tank, so that the refrigerant is evaporated, and then the cooling capacity is consumed is avoided, and the refrigerating efficiency of the heat pump system is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, specifically to a bidirectional energy-saving liquid storage device for heat pump systems. Background Technology

[0002] A heat pump is a device that transfers heat energy from a low-temperature heat source to a high-temperature heat source to achieve cooling and heating. It utilizes components such as a compressor, condenser, expansion valve, and evaporator to transfer heat through the phase change process of a circulating working fluid (such as a refrigerant). The receiver-and-discharge tank stores the refrigerant, maintaining a constant pressure and liquid level in the system, ensuring the stability of pressure and temperature during operation, and playing a crucial role in the heat pump system.

[0003] For example, Chinese patent application CN107763907A discloses a liquid reservoir that effectively suppresses the impact noise accompanying the sudden boiling phenomenon when the compressor starts by setting an impact damping component made of porous body or elastomer on the back of the gas-liquid separator. This does not lead to increased complexity, cost, or large size.

[0004] However, the above-mentioned liquid receiver also has certain drawbacks: when the heat pump system switches from heating mode to cooling mode, the liquid receiver changes from the high-pressure side to the low-pressure side. At this time, the refrigerant after being throttled by the expansion valve will flow through the liquid receiver before entering the evaporator for cooling. Since the liquid receiver is a large-volume cavity, the low-pressure refrigerant will evaporate when it flows into the high-pressure liquid receiver. This evaporation will consume some of the cooling capacity, thereby reducing the cooling efficiency. Utility Model Content

[0005] This utility model provides a bidirectional energy-saving liquid receiver for a heat pump system to solve the technical problem that the refrigerant evaporates and consumes cooling capacity when the liquid receiver switches from heating mode to cooling mode, thereby reducing the cooling efficiency.

[0006] To solve the above problems, the present invention provides a bidirectional energy-saving liquid receiver for a heat pump system, which adopts the following technical solution:

[0007] A bidirectional energy-saving liquid receiver for a heat pump system includes a liquid receiver tank for storing refrigerant. The liquid receiver tank is provided with a vertically extending delivery pipe 1, which is located on the left side of the liquid receiver tank. A delivery pipe 2 is provided parallel to the right end of the delivery pipe 1. A U-shaped tube is provided between the delivery pipe 1 and the delivery pipe 2, with its left and right ends fixedly connected to the delivery pipe 1 and the delivery pipe 2, respectively. A one-way valve 1 is provided at the right end of the U-shaped tube to prevent the refrigerant from flowing from left to right in the U-shaped tube.

[0008] The lower end of the delivery pipe is equipped with a one-way valve 2 to prevent the liquid from flowing upward, and the lower end of the delivery pipe 2 is equipped with a one-way valve 3 to prevent the refrigerant from flowing downward. Both one-way valve 2 and one-way valve 3 are located below the U-shaped pipe.

[0009] Its beneficial effects are as follows: by setting a U-shaped pipe and a one-way valve between the two delivery pipes, the refrigerant can flow out of the liquid storage tank through the U-shaped pipe when the heat pump system switches from heating mode to cooling mode, avoiding the situation where the refrigerant evaporates due to entering the liquid storage tank and thus consuming the cooling capacity, thereby improving the cooling efficiency of the heat pump system.

[0010] Furthermore, the lower end of the U-shaped tube has multiple oil return holes, which are used to input lubricating oil into the U-shaped tube.

[0011] Furthermore, the upper ends of both the second and third conveying pipes are located outside the storage tank, and both the upper ends of the second and third conveying pipes are equipped with connectors.

[0012] Furthermore, the one-way valve one, one-way valve two, and one-way valve three are all piston-type one-way valves.

[0013] Its beneficial effects are as follows: by setting one-way valve one, one-way valve two and one-way valve three as piston-type one-way valves, the refrigeration pipeline can have better sealing performance and can adapt to a larger flow rate, thereby ensuring the stability of the heat pump system.

[0014] Furthermore, the liquid storage tank has a capsule-shaped structure and is made of copper.

[0015] Furthermore, the diameter of the oil return hole is 1.5 mm.

[0016] Its beneficial effect is that setting multiple 1.5 mm oil return holes on the U-shaped tube can prevent the oil return holes from being blocked by tiny impurities and particles, ensuring that the lubricating oil can flow back smoothly.

[0017] Furthermore, the materials of the first conveying pipe, the second conveying pipe, and the U-shaped pipe are all stainless steel.

[0018] The beneficial effects of the bidirectional energy-saving liquid storage device for a heat pump system provided by this utility model are:

[0019] 1. By installing a U-shaped pipe and a one-way valve between the two delivery pipes, the refrigerant can flow out of the liquid storage tank through the U-shaped pipe when the heat pump system switches from heating mode to cooling mode. This avoids the situation where the refrigerant enters the liquid storage tank and causes the refrigerant to evaporate, thus consuming cooling capacity and improving the cooling efficiency of the heat pump system.

[0020] 2. By setting check valve one, check valve two, and check valve three as piston-type check valves, the refrigeration pipeline can have better sealing performance and can adapt to a larger flow rate, thereby ensuring the stability of the heat pump system.

[0021] 3. Setting multiple 1.5 mm oil return holes on the U-shaped tube can prevent the oil return holes from being blocked by tiny impurities and particles, ensuring that the lubricating oil can flow back smoothly. Attached Figure Description

[0022] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0023] Figure 1 This utility model provides a structural schematic diagram of a bidirectional energy-saving liquid storage device for a heat pump system.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Storage tank; 2. Delivery pipe one; 3. Delivery pipe two; 4. U-shaped pipe; 5. Check valve one; 6. Check valve two; 7. Check valve three; 8. Oil return hole; 9. Connector. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] The main concept of this utility model is that by setting a U-shaped pipe 4 and a one-way valve between the two delivery pipes, the refrigerant can flow out of the liquid storage tank 1 through the U-shaped pipe 4 when the heat pump system switches from heating mode to cooling mode. This avoids the situation where the refrigerant enters the liquid storage tank 1 and causes the refrigerant to evaporate and consume cooling capacity, thereby improving the cooling efficiency of the heat pump system.

[0028] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0030] Example 1 of a bidirectional energy-saving liquid storage device for a heat pump system provided by this utility model:

[0031] like Figure 1As shown, the liquid receiver includes a liquid tank 1 for storing refrigerant. The liquid tank 1 is a capsule-shaped copper structure. A vertically extending delivery pipe 2 is provided inside the liquid tank 1. The delivery pipe 2 is located on the left side of the liquid tank 1. A delivery pipe 3 is provided in parallel on the right side of the delivery pipe 2. A downwardly bent U-shaped pipe 4 is provided between the delivery pipe 2 and the delivery pipe 3. The left and right ends of the U-shaped pipe 4 are fixedly connected to the delivery pipe 2 and the delivery pipe 3, respectively. The delivery pipe 2, the delivery pipe 3 and the U-shaped pipe 4 are all made of stainless steel.

[0032] The U-shaped tube 4 has a one-way valve 5 at its right end, which prevents the refrigerant from flowing from right to left within the U-shaped tube 4. The lower end of the delivery pipe 2 has a one-way valve 6, which prevents the refrigerant from flowing from bottom to top within the delivery pipe 2. The lower end of the delivery pipe 3 has a one-way valve 7, which prevents the refrigerant from flowing from top to bottom within the delivery pipe 3. Both the one-way valve 6 and the one-way valve 3 are located below the U-shaped tube 4. The one-way valves 5, 6, and 3 are all piston-type one-way valves to improve the sealing of the refrigerant pipeline.

[0033] In addition, the lower end of the U-shaped tube 4 is provided with multiple oil return holes 8 with a diameter of 1.5 mm, which can ensure the oil return volume while preventing the oil return holes 8 from being blocked by tiny impurities and particles, ensuring that the lubricating oil can flow back smoothly; the upper ends of the first conveying pipe 2 and the second conveying pipe 3 are both located outside the liquid storage tank 1 and the upper ends of the first conveying pipe 2 and the second conveying pipe 3 are both provided with connectors 9.

[0034] The working principle of the liquid receiver is as follows: When the heat pump system is in heating mode, the refrigerant flows into the liquid receiver from the delivery pipe 2 under the action of one-way valve 6 and one-way valve 3, and flows out of the liquid receiver from the delivery pipe 3. At this time, the refrigerant cannot pass through the U-shaped pipe 4 under the action of one-way valve 5. When the heat pump system switches to cooling mode, the refrigerant flows into the U-shaped pipe 4 from the delivery pipe 3 under the blocking action of one-way valve 6. When the refrigerant flows into the delivery pipe 2 through the U-shaped pipe 4, it flows upward and out of the liquid receiver 1 under the blocking action of one-way valve 6. The lubricating oil in the liquid receiver 1 will flow back into the pipeline through the oil return hole 8 on the U-shaped pipe 4 to ensure the stability of the heat pump system.

[0035] Embodiment 2 of a bidirectional energy-saving liquid storage device for a heat pump system provided by this utility model:

[0036] Its main difference from Example 1 is:

[0037] In Example 1, the liquid storage tank is made of copper.

[0038] In this embodiment, the liquid storage tank is made of stainless steel.

[0039] Embodiment 3 of a bidirectional energy-saving liquid storage device for a heat pump system provided by this utility model:

[0040] Its main difference from Example 1 is:

[0041] In Example 1, the one-way valve is located at the right end of the U-shaped tube.

[0042] In this embodiment, the one-way valve is located at the left end of the U-shaped tube.

[0043] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0044] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A bidirectional energy-saving liquid receiver for a heat pump system, comprising a liquid receiver tank for storing refrigerant, wherein a vertically extending delivery pipe is provided inside the liquid receiver tank, the delivery pipe being located on the left side of the liquid receiver tank, and a delivery pipe being provided parallel to the right end of the delivery pipe, characterized in that: A U-shaped tube is provided between delivery pipe one and delivery pipe two, with its left and right ends fixedly connected to delivery pipe one and delivery pipe two respectively. A one-way valve is provided at the right end of the U-shaped tube to prevent refrigerant from flowing from left to right in the U-shaped tube. The lower end of the delivery pipe is equipped with a one-way valve 2 to prevent the liquid from flowing upward, and the lower end of the delivery pipe 2 is equipped with a one-way valve 3 to prevent the refrigerant from flowing downward. Both one-way valve 2 and one-way valve 3 are located below the U-shaped pipe.

2. The bidirectional energy-saving liquid receiver for a heat pump system according to claim 1, characterized in that, The lower end of the U-shaped tube has multiple oil return holes, which are used to input lubricating oil into the U-shaped tube.

3. The bidirectional energy-saving liquid receiver for a heat pump system according to claim 2, characterized in that, The upper ends of both the second and third conveying pipes are located outside the storage tank, and both the upper ends of the second and third conveying pipes are equipped with connectors.

4. The bidirectional energy-saving liquid receiver for a heat pump system according to claim 3, characterized in that, The one-way valve, one-way valve, and one-way valve are all piston-type one-way valves.

5. A bidirectional energy-saving liquid receiver for a heat pump system according to claim 4, characterized in that, The liquid storage tank has a capsule-shaped structure and is made of copper.

6. A bidirectional energy-saving liquid receiver for a heat pump system according to claim 5, characterized in that, The diameter of the oil return hole is 1.5 mm.

7. A bidirectional energy-saving liquid receiver for a heat pump system according to claim 6, characterized in that, The materials of the first conveying pipe, the second conveying pipe, and the U-shaped pipe are all stainless steel.

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