Refrigeration appliance

Abstract

The utility model discloses a refrigeration plant, include: compressor, condenser and evaporator, and the refrigerant export of compressor is connected with the refrigerant import of condenser through the pipeline, and the refrigerant export of condenser is connected with the refrigerant import of evaporator through the pipeline, and the refrigerant export of evaporator is connected with the first refrigerant import of compressor through the pipeline, and the compressor compresses the refrigerant that flows from the first refrigerant import, be provided with liquid suspension device in evaporator, and liquid rotary device uses the refrigerant to suspend the axle, and evaporator is provided with second refrigerant import, and second refrigerant import communicates with liquid suspension device, and the inside of evaporator is provided with the containing space for containing refrigerant, and the bottom of containing space communicates with second refrigerant import through target pipeline, if evaporator can not provide enough refrigerant to compressor, then can provide refrigerant to evaporator through target pipeline to can make compressor normal work.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to refrigeration equipment. Background Technology

[0002] The core components of refrigeration equipment generally include a compressor, a condenser, and an evaporator. The compressor typically contains a rotating centrifugal impeller with a central shaft driven by a motor. This rotation of the impeller causes a liquid film to form around the impeller. When gaseous refrigerant enters this liquid film, it interacts with the impeller surface, compressing the refrigerant and further compressing it before it is discharged from the outlet of the impeller.

[0003] With the development and progress of technology, liquid suspension devices have gradually begun to be applied. Liquid suspension devices utilize hydraulic principles to form a high-pressure oil film between the bearing and the shaft, enabling the bearing to suspend on the shaft, thereby achieving contactless and low-friction operation. This design not only reduces mechanical wear but also greatly improves the service life of the bearing. The liquid suspension device has the following advantages: (1) Oil-free lubrication: Using hydraulic suspension technology, there is no need to add lubricating oil, reducing maintenance costs and avoiding the problem of oil pollution in the environment; (2) Low friction and low energy consumption: Since there is no direct contact between the bearing and the shaft, the coefficient of friction is extremely low, effectively reducing energy consumption; (3) High precision and high stability: The hydraulic suspension system can automatically adjust the bearing position, maintain high-precision operation, and improve the stability of mechanical equipment.

[0004] To improve the lifespan of a compressor, a liquid suspension device can be used to suspend the bearing on the shaft. In practice, the compressor receives refrigerant from the evaporator, and the "high-pressure oil film" is usually formed by this refrigerant. Understandably, if the operating conditions of the refrigeration equipment change, the evaporator may not be able to supply enough refrigerant to the compressor. Due to the lack of refrigerant, the bearing cannot be suspended on the shaft, which may cause the compressor to malfunction. Utility Model Content

[0005] In view of this, the main objective of this utility model is to provide a refrigeration device.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A refrigeration device, comprising a compressor, a condenser, and an evaporator, wherein the refrigerant outlet of the compressor is connected to the refrigerant inlet of the condenser via a pipe, the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator via a pipe, and the refrigerant outlet of the evaporator is connected to a first refrigerant inlet of the compressor via a pipe, the compressor compressing the refrigerant flowing in from the first refrigerant inlet; a liquid suspension device is provided in the evaporator, the liquid rotation device using refrigerant to suspend its shaft; the evaporator is provided with a second refrigerant inlet, the second refrigerant inlet communicating with the liquid suspension device; the interior of the evaporator is provided with a receiving space for containing refrigerant; the bottom of the receiving space is connected to the second refrigerant inlet via a target pipe.

[0007] As an improvement of this utility model embodiment, a liquid supply pump is provided in the target pipeline.

[0008] As an improvement of this utility model embodiment, a filter is provided in the target pipeline.

[0009] As an improvement of this utility model embodiment, a ball valve is provided in the target pipeline.

[0010] As an improvement of this utility model embodiment, a solenoid valve is provided in the target pipeline.

[0011] As an improvement of this utility model embodiment, the evaporator is a thin-film evaporator.

[0012] As an improvement of this utility model embodiment, a flash tank is provided between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator.

[0013] As an improvement of this utility model embodiment, an electronic expansion valve is provided between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator.

[0014] As an improvement of this utility model embodiment, there are two electronic expansion valves, which are respectively installed at the refrigerant inlet and refrigerant outlet of the flash tank.

[0015] As an improvement of this utility model embodiment, a filter is provided between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator.

[0016] The refrigeration equipment provided in this embodiment of the present invention has the following advantages: This embodiment of the present invention discloses a refrigeration equipment, including: a compressor, a condenser, and an evaporator. The refrigerant outlet of the compressor is connected to the refrigerant inlet of the condenser via a pipe; the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator via a pipe; the refrigerant outlet of the evaporator is connected to the first refrigerant inlet of the compressor via a pipe; the compressor compresses the refrigerant flowing in from the first refrigerant inlet; a liquid suspension device is provided in the evaporator, and the liquid rotation device uses refrigerant to suspend its shaft; the evaporator is provided with a second refrigerant inlet, which is connected to the liquid suspension device; the interior of the evaporator is provided with a receiving space for containing refrigerant; the bottom of the receiving space is connected to the second refrigerant inlet via a target pipe. If the evaporator cannot provide sufficient refrigerant to the compressor, refrigerant can be supplied to the evaporator through the target pipe, thereby allowing the compressor to operate normally. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the refrigeration equipment provided in the embodiment of this utility model. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0019] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0020] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] This utility model provides a refrigeration device, which includes a compressor 1, a condenser 2, and an evaporator 3. The refrigerant outlet of the compressor 1 is connected to the refrigerant inlet of the condenser 2 through a pipe. The refrigerant outlet of the condenser 2 is connected to the refrigerant inlet of the evaporator 3 through a pipe. The refrigerant outlet of the evaporator 3 is connected to the first refrigerant inlet of the compressor 1 through a pipe. The compressor 1 compresses the refrigerant flowing in from the first refrigerant inlet.

[0022] Compressor 1 is a fluid machine that raises low-pressure refrigerant to high-pressure refrigerant. It draws in low-temperature, low-pressure refrigerant from the first refrigerant inlet, compresses it, and discharges high-temperature, high-pressure refrigerant to the refrigerant outlet, providing power for the refrigeration cycle.

[0023] Condenser 2 converts gaseous or vaporous refrigerant into liquid refrigerant, rapidly transferring heat from the pipes to the surrounding air. The operation of condenser 2 is an exothermic process.

[0024] Evaporator 3 is a crucial component in refrigeration. Low-temperature refrigerant passes through evaporator 3, exchanging heat with the outside air, vaporizing and absorbing heat to achieve a cooling effect. Evaporator 3 mainly consists of two parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation to the liquid, causing it to boil and vaporize; the evaporation chamber completely separates the gas and liquid phases.

[0025] The evaporator 3 is equipped with a liquid suspension device, which uses refrigerant to suspend the shaft. The evaporator 3 has a second refrigerant inlet connected to the liquid suspension device. The interior of the evaporator 3 contains a refrigerant-containing space. The bottom of this space is connected to the second refrigerant inlet via a target pipe 4. This space can be an evaporation chamber.

[0026] If the operating conditions of the refrigeration equipment change, the evaporator may not be able to supply enough refrigerant to the compressor. In this case, refrigerant can be supplied to the evaporator 3 through the target pipe 4, so that the compressor can work normally.

[0027] In this embodiment, a liquid supply pump 41 is provided in the target pipeline 4.

[0028] In this embodiment, a first filter 42 is installed in the target pipe 4. The core function of the first filter 42 is to filter impurities and absorb moisture, protecting the components in the refrigeration equipment and ensuring stable operation.

[0029] In this embodiment, a ball valve 43 is installed in the target pipeline 4. In the ball valve 43, the opening and closing element (ball) is driven by the valve stem and rotates around the axis of the ball valve.

[0030] In this embodiment, a solenoid valve 44 is provided in the target pipeline 4.

[0031] In this embodiment, the evaporator 3 is a thin-film evaporator.

[0032] In this embodiment, a flash tank 5 is installed between the refrigerant outlet of the condenser 2 and the refrigerant inlet of the evaporator 3. The flash tank mainly undertakes the core functions of flash vaporization and energy recovery, achieving phase change of the refrigerant by adjusting the pressure difference, thereby improving system energy efficiency. After the high-pressure, high-temperature refrigerant enters the flash tank, the pressure is reduced by a pressure reducing valve, causing the refrigerant boiling point to decrease. At this time, the refrigerant temperature is still higher than the boiling point at the current pressure, and it rapidly vaporizes and separates into gas and liquid phases in the flash tank. This process mainly relies on pressure change rather than temperature change to achieve phase change, thus releasing a large amount of latent heat at a lower temperature.

[0033] In this embodiment, an electronic expansion valve 53 is provided between the refrigerant outlet of the condenser 2 and the refrigerant inlet of the evaporator 3.

[0034] In this embodiment, there are two electronic expansion valves 53, which are respectively installed at the refrigerant inlet and refrigerant outlet of the flash tank 5.

[0035] In this embodiment, a second filter 54 is provided between the refrigerant outlet of the condenser 2 and the refrigerant inlet of the evaporator 3.

[0036] Here, as Figure 1As shown, a pipe is installed between the refrigerant outlet and refrigerant inlet of compressor 1. A bypass valve 51 is installed on this pipe. The bypass valve 51 is located in the pipe between the compressor's refrigerant outlet and inlet, and its main function is to regulate the system pressure and ensure the stable operation of the compressor and the system. When the system experiences abnormal pressure (such as excessively high refrigerant outlet pressure or excessively low inlet pressure), the bypass valve can open, allowing some refrigerant to bypass from the outlet back to the inlet, balancing the pressure between the inlet and outlet, preventing the compressor from being damaged due to excessive pressure difference, and also preventing the system from failing to cool or heat normally due to unstable pressure.

[0037] like Figure 1 As shown, compressor 1 and evaporator 3 are connected by a pipe, and a regulating valve 52 is installed in this pipe. This regulating valve 52 allows refrigerant from the compressor to flow into the evaporator. Essentially, it transforms the high-pressure liquid refrigerant from compressor 1 into a low-temperature, low-pressure mist-like refrigerant. This allows the refrigerant to effectively absorb heat and achieve cooling when it flows into evaporator 3. Furthermore, the regulating valve 52 automatically adjusts the amount of refrigerant, ensuring that the refrigerant in evaporator 3 is just used up, thus guaranteeing maximum efficiency while preventing excessive liquid refrigerant from damaging the compressor.

[0038] An electronic expansion valve 53 and a second filter 54 are provided between the refrigerant outlet of the condenser 2 and the refrigerant inlet of the evaporator 3. Here, the electronic expansion valve 53 uses the electrical signal generated by the regulated parameter to control the voltage or current applied to the expansion valve, thereby achieving the purpose of regulating the liquid supply.

[0039] like Figure 1As shown, installing a flash tank 5 in the pipe between the condenser 2 and the evaporator 3, and introducing a portion of its output refrigerant into the compressor 1, has the following advantages: 1. Lowering the suction temperature of the compressor 1, avoiding the risk of "liquid slugging," and protecting the compressor 1; 2. Increasing the suction pressure of the compressor 1, reducing compression power consumption, and improving the system COP (Coefficient of Performance). 3. Increases refrigerant flow to the evaporator, improving system cooling capacity. Without a flash tank, flash gas mixed in with the refrigerant flowing out of the condenser occupies the heat exchange area of ​​the evaporator (gas heat exchange efficiency is much lower than liquid), preventing the liquid refrigerant from evaporating fully and reducing the actual cooling capacity of the evaporator. After the flash tank separates the flash gas, the refrigerant flowing to the evaporator is almost "pure liquid," making fuller use of the evaporator's heat exchange area. At the same time, the "mass flow rate" of the liquid refrigerant in the evaporator increases (liquid density is much greater than gas for the same volume). 4. Expands the system's adaptability to low-temperature conditions and stabilizes operating performance. In low-temperature environments (such as winter refrigeration and low-temperature cold storage), the refrigerant suction pressure at the evaporator outlet will significantly decrease. Conventional systems are prone to problems such as "insufficient superheat of the compressor suction" and "excessive compression ratio," leading to unstable operation. The medium-pressure gaseous refrigerant introduced by the flash tank can alleviate this problem.

[0040] like Figure 1 As shown, the refrigerant in the condenser 2 can flow through the first filter 42 and the liquid supply pump 41, and then flow to the compressor 1. When the compressor 1 is short of refrigerant, the condenser 2 can provide some refrigerant to the compressor, thereby providing a stable, pure, and high-pressure liquid refrigerant supply, thus protecting the equipment, improving efficiency, and achieving precise control.

[0041] like Figure 1 As shown, some of the refrigerant in condenser 2 flows out, passing through solenoid valve 44, first filter 42, liquid supply pump 41, ball valve 43, solenoid valve 44, and check valve 45 before flowing back into condenser 2. Here, a portion of the high-pressure refrigerant that has already condensed into liquid is drawn from the main circuit of condenser 2 and allowed to flow through a separate, lower-temperature pipeline for "extra" cooling, lowering its temperature below its saturation temperature (condensation temperature) at its current pressure. This "supercooled" refrigerant, when flowing through the throttle valve (expansion valve), effectively reduces the "flash gas" (i.e., ineffective gas formed by premature vaporization of some liquid) generated at the valve.

[0042] When the ambient temperature is high, or when the refrigeration equipment is in the initial stage of startup, the temperature of evaporator 3 will be relatively high. Under this condition, the system superheat (i.e., the difference between the return gas temperature and the evaporation temperature) will become extremely small, and in extreme cases, it may even be negative.

[0043] The opening control of the electronic expansion valve 53 (adjustment range 10%-100%) is based on a preset superheat value, which is typically 2°C for a flooded unit. Its control logic is as follows: when the actual superheat is higher than the set value, the valve will reduce its opening to decrease the refrigerant flow; when the actual superheat is lower than the set value, the valve will increase its opening to increase the refrigerant flow.

[0044] Since the superheat is often negative (far below the set value of 2°C) during the initial startup of the equipment, the electronic expansion valve 53 will increase its opening to the maximum of 100% according to the control logic. This operation will cause the refrigerant in the condenser to rush into the evaporator in a short period of time, completing the initial stage of refrigerant filling and system cooling preparation.

[0045] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A refrigeration device, the refrigeration device comprising: The compressor (1), condenser (2), and evaporator (3) are provided. The refrigerant outlet of the compressor (1) is connected to the refrigerant inlet of the condenser (2) via a pipe. The refrigerant outlet of the condenser (2) is connected to the refrigerant inlet of the evaporator (3) via a pipe. The refrigerant outlet of the evaporator (3) is connected to the first refrigerant inlet of the compressor (1) via a pipe. The compressor (1) compresses the refrigerant flowing in from the first refrigerant inlet. The compressor (1) is characterized in that... The evaporator (3) is provided with a liquid suspension device, and the liquid rotation device uses refrigerant to suspend the shaft; the evaporator (3) is provided with a second refrigerant inlet, which is connected to the liquid suspension device; The evaporator (3) has an internal space for holding refrigerant. The bottom of the containment space is connected to the second refrigerant inlet via the target pipe (4).

2. The refrigeration equipment according to claim 1, characterized in that: A liquid supply pump (41) is installed in the target pipeline (4).

3. The refrigeration equipment according to claim 1, characterized in that: A first filter (42) is provided in the target pipe (4).

4. The refrigeration equipment according to claim 1, characterized in that: A ball valve (43) is installed in the target pipeline (4).

5. The refrigeration equipment according to claim 1, characterized in that: A solenoid valve (44) is installed in the target pipeline (4).

6. The refrigeration equipment according to claim 1, characterized in that: The evaporator (3) is a thin-film evaporator.

7. The refrigeration equipment according to claim 1, characterized in that: A flash tank (5) is provided between the refrigerant outlet of the condenser (2) and the refrigerant inlet of the evaporator (3).

8. The refrigeration equipment according to claim 7, characterized in that: An electronic expansion valve (53) is provided between the refrigerant outlet of the condenser (2) and the refrigerant inlet of the evaporator (3).

9. The refrigeration equipment according to claim 8, characterized in that: There are two electronic expansion valves (53), which are respectively installed at the refrigerant inlet and refrigerant outlet of the flash tank (5).

10. The refrigeration equipment according to claim 1, characterized in that: A second filter (54) is provided between the refrigerant outlet of the condenser (2) and the refrigerant inlet of the evaporator (3).

Images