Liquid accumulator of low-temperature single screw unit

Abstract

The liquid storage device of the low-temperature single-screw unit comprises a tank body and a siphon tank, the tank body comprises a liquid inlet pipe and a balance pipe, the liquid inlet pipe is connected between the tank body and the siphon tank, and the liquid inlet pipe is used for conveying refrigerants; the balance pipe is connected between the tank body and the siphon tank, the balance pipe is used for balancing the pressure in the tank body and the siphon tank, and the balance pipe connected between the tank body and the siphon tank can balance the pressure between the tank body and the siphon tank, so that the pressure difference between the tank body and the siphon tank is prevented from being too large, and it is ensured that a refrigerant can smoothly flow into the liquid storage device.

Description

Technical Field

[0001] The utility model relates to a liquid storage device for a low-temperature single-machine screw unit. Background Art

[0002] The low-temperature single-machine screw unit is a refrigeration equipment that can meet the low-temperature requirements of other equipment by circulating the refrigerant at a constant flow and pressure. Therefore, it is widely used in freezing, refrigeration, industrial cooling and other scenarios that require low-temperature treatment.

[0003] Most of the currently commonly used low-temperature screw units are generally composed of components such as a screw compressor, a siphon liquid storage tank, a horizontal liquid storage tank and an economizer, as described in the patent document of Chinese Patent Publication No. CN220017762U.

[0004] However, the existing liquid storage device and the siphon tank are directly connected through a liquid inlet pipe to realize the transmission of refrigerant. When the liquid pressure in the liquid storage tank changes, the siphon tank may not be able to respond to the change in time, resulting in an increase in the pressure difference between the two, thereby causing the refrigerant to flow unsmoothly. Utility Model Content

[0005] The utility model aims to provide a technical solution for a liquid storage device of a low-temperature single-machine screw unit in view of the deficiencies in the prior art, which can timely balance the pressure between the liquid storage device and the siphon tank to ensure that the refrigerant can flow smoothly into the liquid storage device.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A liquid storage device for a low-temperature single-machine screw unit, comprising

[0008] A tank for storing refrigerant liquid;

[0009] Siphon tank, used to transfer refrigerant into the tank by siphon effect;

[0010] The tank body includes a liquid inlet pipe and a balance pipe. The liquid inlet pipe is connected between the tank body and the siphon tank and is used for transmitting the refrigerant; the balance pipe is connected between the tank body and the siphon tank and is used for balancing the pressure in the tank body and the siphon tank.

[0011] By adopting the above technical solution, the balance pipe connected between the tank body and the siphon tank can balance the pressure between the two, so as to avoid excessive pressure difference between the tank body and the siphon tank, and ensure that the refrigerant can flow smoothly into the liquid storage device.

[0012] Furthermore, a valve head is connected between the balance pipe and the tank body, and the balance pipe and the tank body are connected through the valve head.

[0013] Furthermore, a sealing ring is provided between the valve head and the tank body.

[0014] Furthermore, the tank body includes a safety valve, which is installed on one side of the tank body and is used to adjust the pressure in the tank body.

[0015] Furthermore, it also includes a unit frame, which is used to fix the tank body; a support foot is connected to the bottom of the tank body, and the support foot can be fixed to the unit frame by bolts, and the tank body is fixed by the support foot and the unit frame.

[0016] Furthermore, the unit frame includes strip holes, and the support legs are fixed in cooperation with the strip holes on the unit frame by bolts.

[0017] Furthermore, the support leg includes a connecting piece, which is located at the top of the support leg, and the support leg is connected to the tank body through the connecting piece.

[0018] Furthermore, the connecting piece and the supporting foot are integrally formed.

[0019] Furthermore, a float pressure sensor is provided in the tank body.

[0020] Furthermore, an indicator light is connected to the surface of the tank body, and the indicator light is control-connected to a float pressure sensor.

[0021] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0022] 1. The utility model can avoid excessive pressure difference between the tank body and the siphon tank by arranging a balance pipe between the tank body and the siphon tank to balance the pressure between the two, thereby ensuring that the refrigerant can flow smoothly into the liquid storage device;

[0023] 2. In the utility model, the liquid reservoir is connected to the unit frame through the support legs, and the corresponding position of the unit frame is provided with a strip hole, which can provide space for the liquid reservoir to flexibly adjust the position;

[0024] 3. The support leg of the utility model is connected to the tank body through a connecting piece, which increases the contact area of ​​the connection and improves the connection stability;

[0025] 4. The utility model provides a float pressure sensor in the liquid storage device in cooperation with an indicator light to indicate the pressure value in the tank body. Thus, even if the safety valve works abnormally, the user can judge the pressure condition in the tank body according to the indicator light. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 It is a structural schematic diagram of the liquid storage device of the utility model;

[0028] Figure 2 It is a structural schematic diagram of a part of the unit frame of the utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure between the liquid storage device and the siphon tank of the utility model;

[0030] Figure 4 This is a schematic diagram of the overall structure of the utility model unit;

[0031] Figure 5 is a schematic diagram of the structure of the supporting foot in Example 2;

[0032] In the figure: 1-liquid reservoir; 11-tank body; 12-valve head; 13-balance pipe; 14-liquid inlet pipe; 15-liquid outlet pipe; 16-safety valve; 17-support foot; 18-connecting piece;

[0033] 2- siphon tank; 3- gas-liquid separator; 4- economizer; 5- compressor; 6- plate heat exchanger; 7- unit frame; 71- strip hole. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0037] Example 1

[0038] A liquid storage device for a low-temperature single-machine screw unit, installed in the low-temperature single-machine screw unit;

[0039] The low temperature single screw unit includes a compressor 5, a gas-liquid separator 3, an economizer 4, a plate heat exchanger 6, an oil separator, a condenser, an essential oil filter and a liquid storage device. Figure 4 As shown;

[0040] The gas-liquid separator 3 can separate the cold storage refrigerant vapor and the unevaporated refrigerant liquid, the refrigerant liquid sinks, and the refrigerant vapor enters the compressor 5;

[0041] The refrigerant vapor is compressed by the compressor 5 and discharged into the oil separator, and the oil separator separates the oil inside the compressor 5 and the compressed refrigerant vapor;

[0042] The separated oil enters the plate heat exchanger 6 for cooling, while the refrigerant vapor enters the condenser for cooling. After condensation in the condenser, the refrigerant vapor is converted into refrigerant liquid;

[0043] The condensed refrigerant liquid enters the siphon tank 2, and most of the refrigerant is sucked into the liquid storage tank through the siphon effect; the liquid storage tank can pass the refrigerant liquid through the liquid supply filter barrel through the liquid outlet pipe 15 and then enter the economizer for secondary cooling, and then supply it to the evaporator in the cold storage;

[0044] A small part of the refrigerant will enter the plate heat exchanger 6 to cool the oil separated by the oil separator. After cooling, it will be filtered by the oil separator and then return to the compressor 5 to complete the cycle.

[0045] The above components in the unit are all installed on the unit frame 7 for fixation;

[0046] The liquid storage device comprises a tank body 11, and the tank body 11 comprises a liquid inlet pipe 14 and a balance pipe 13;

[0047] The liquid inlet pipe 14 is connected between the tank body 11 and the siphon tank 2. Figure 3 As shown, the siphon tank 2 can transfer the refrigerant liquid to the tank body 11 through the liquid inlet pipe 14;

[0048] The balance pipe 13 is connected between the tank body 11 and the siphon tank 2. Figure 3 As shown, the balance pipe 13 is used to balance the pressure in the tank body 11 and the siphon tank 2;

[0049] By arranging a balance pipe 13 between the tank body 11 and the siphon tank 2 to balance the pressure therebetween, it is possible to avoid an excessively large pressure difference between the tank body 11 and the siphon tank 2, thereby ensuring that the refrigerant liquid can flow smoothly into the liquid storage device.

[0050] Furthermore, a valve head 12 is provided on the surface of the tank body 11, and one end of the balance pipe 13 is connected to the valve head 12. Figure 3 As shown, the balance pipe 13 is connected to the tank body 11 through the valve head 12;

[0051] The valve head 12 can control the opening and closing of the balance pipe 13;

[0052] A sealing ring is provided at the connection between the valve head 12 and the tank body 11 .

[0053] A safety valve 16 is installed on the surface of the tank body 11. Figure 1 , Figure 3 As shown;

[0054] The safety valve 16 is capable of regulating the pressure in the tank 11 .

[0055] In this embodiment, the liquid outlet pipe 15 is fixedly connected to one side of the tank body 11. Figure 3 As shown;

[0056] The tank body 11 transmits the refrigerant liquid to the liquid supply filter barrel through the liquid outlet pipe 15 .

[0057] The bottom of the tank body 11 is connected with a support leg 17;

[0058] In this embodiment, the support leg 17 is L-shaped, and its upper portion is welded to the surface of the tank body 11. Figure 1 As shown;

[0059] The lower part of the support leg 17 is parallel to the corresponding part of the unit frame 7 and is fixed by bolts;

[0060] The unit frame 7 portion corresponding to the support leg 17 is provided with a hole for the bolt to pass through, and further, the hole is a strip hole 71, such as Figure 2 As shown;

[0061] By opening a strip-shaped hole 71 at a position corresponding to the unit frame 7, space for flexibly adjusting the position of the liquid reservoir can be provided.

[0062] Example 2

[0063] This embodiment is different from the embodiment 1 in that, in this embodiment, the bracket 17 includes a connecting piece 18, such as Figure 5 As shown;

[0064] The connecting piece 18 is formed with an arc adapted to the surface of the tank body 11, such as Figure 5 As shown;

[0065] The connecting piece 18 is correspondingly attached to the surface of the tank body 11 , and the supporting leg 17 is connected to the tank body 11 through the connecting piece 18 , which can increase the contact area of ​​the connection between the supporting leg 17 and the tank body 11 and improve the connection stability.

[0066] Furthermore, the support leg 17 and the connecting piece 18 are integrally formed.

[0067] In this embodiment, a float pressure sensor is provided in the tank body 11;

[0068] An indicator light is provided on the surface of the tank body 11, and the indicator light is connected to the float pressure sensor through wireless signal control. By setting the indicator light and the float pressure sensor together, even if the safety valve 16 works abnormally, the user can judge the pressure situation in the tank body 11 according to the indicator light, thereby achieving double protection.

[0069] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A liquid storage device for a low-temperature single-unit screw unit, comprising A tank (11) for storing refrigerant liquid; A siphon tank (2), used for transferring the refrigerant into the tank body (11) through a siphon effect; Features: The tank body (11) comprises a liquid inlet pipe (14) and a balance pipe (13); the liquid inlet pipe (14) is connected between the tank body (11) and the siphon tank (2); the liquid inlet pipe (14) is used for transmitting refrigerant; the balance pipe (13) is connected between the tank body (11) and the siphon tank (2); the balance pipe (13) is used for balancing the pressure in the tank body (11) and the siphon tank (2).

2. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 1, characterized in that: A valve head (12) is connected between the balance pipe (13) and the tank body (11), and the balance pipe (13) and the tank body (11) are connected via the valve head (12).

3. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 2, characterized in that: A sealing ring is provided between the valve head (12) and the tank body (11).

4. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 1, characterized in that: The tank body (11) comprises a safety valve (16), wherein the safety valve (16) is installed on one side of the tank body (11), and the safety valve (16) is used to adjust the pressure in the tank body (11).

5. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 1, characterized in that: It also includes a machine set frame (7), the machine set frame (7) being used to fix the tank body (11); a support foot (17) is connected to the bottom of the tank body (11), the support foot (17) can be fixed to the machine set frame (7) by means of bolts, and the tank body (11) is fixed to the machine set frame (7) by means of the support foot (17).

6. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 5, characterized in that: The unit frame (7) comprises a strip hole (71), and the support foot (17) is fixed in cooperation with the strip hole (71) on the unit frame (7) by means of bolts.

7. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 5, characterized in that: The support leg (17) comprises a connecting piece (18), wherein the connecting piece (18) is located at the top of the support leg (17), and the support leg (17) is connected to the tank body (11) via the connecting piece (18).

8. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 7, characterized in that: The connecting piece (18) and the supporting foot (17) are integrally formed.

9. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 1, characterized in that: A float pressure sensor is arranged in the tank body (11).

10. The liquid storage device of a low-temperature single-unit screw compressor unit according to claim 9, characterized in that: An indicator light is connected to the surface of the tank body (11), and the indicator light is controllably connected to the float pressure sensor.

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