Liquid accumulator for refrigerating system
By introducing cooling and heating modules into the liquid receiver, the gas state inside the liquid receiver is regulated, which solves the problem that the liquid storage function of the liquid receiver is affected by the ambient temperature and improves the energy efficiency of the refrigeration system.
Patent Information
- Application Number
- CN202423111942.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The liquid storage function of existing liquid receivers in refrigeration systems is affected by ambient temperature, resulting in low energy efficiency of the refrigeration system and an inability to respond to liquid storage needs in a timely manner.
Design a liquid receiver for a refrigeration system, with a built-in cooling module and a heating module. The gas inside the liquid receiver is cooled and heated through a heat exchanger, and the volume and gas pressure of the liquid receiver are adjusted to improve the liquid storage performance.
It enables effective control over the release and storage of liquid in the receiver, meeting the needs of different operating conditions and improving the energy efficiency of the refrigeration system.
Smart Images
Figure CN223537854U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration equipment technology, specifically a liquid receiver for a refrigeration system. Background Technology
[0002] The receiver is used to store high-pressure liquid from the condenser, ensuring that the liquid does not flood the condenser surface, while regulating and stabilizing the refrigerant circulation to adapt to changes in system operating conditions.
[0003] The driving force for the liquid storage function of a single-tube liquid receiver comes from the temperature difference between the refrigerant at the condenser outlet and the wall of the liquid receiver. When the heat pump unit is running normally, the ambient temperature of the liquid receiver is usually much lower than the condenser outlet temperature. Excess refrigerant from the heat pump operation will migrate to the liquid receiver due to the driving force generated by the temperature difference, so that the refrigeration system can operate stably.
[0004] However, when a plate heat exchanger is used in the condenser of a refrigeration system, there are situations where the performance of the liquid receiver affects the energy efficiency of the refrigeration system: The first situation is that when the unit is heating, the amount of refrigerant in heating is much more than that in cooling, which limits the liquid receiver's storage function, affects the normal operation of the refrigeration system, and results in very low energy efficiency due to excessively high condensing pressure; The second situation is that when the unit is cooling, the ambient temperature is very low, making it difficult for the refrigerant inside the liquid receiver to be released back into the refrigeration system, resulting in refrigerant shortage operation, which also leads to excessively low energy efficiency. Utility Model Content
[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a liquid receiver for a refrigeration system, which solves the problems that existing liquid receivers are limited by ambient temperature in releasing and storing liquid, cannot respond promptly, and have poor liquid storage function.
[0006] A liquid receiver for a refrigeration system according to a first aspect of the present invention includes:
[0007] The liquid reservoir body has an inlet and outlet at its bottom;
[0008] The cooling module is located in the upper part of the liquid reservoir body. The cooling module is used to cool the gas above the liquid surface inside the liquid reservoir body.
[0009] The heating module, located in the lower part of the liquid reservoir body, is used to heat the liquid inside the liquid reservoir body.
[0010] A liquid receiver for a refrigeration system according to an embodiment of the present invention has at least the following beneficial effects:
[0011] This invention places the inlet and outlet at the bottom of the liquid reservoir body. The liquid inside the reservoir body forms a liquid seal between the inlet and outlet. When it is necessary to improve the liquid storage performance, the cooling module is activated to cool the gas above the liquid surface inside the reservoir body, causing the gas to condense into liquid, thereby reducing the internal gas and allowing liquid to be drawn in from the inlet and outlet, thus enhancing the liquid storage capacity. When it is necessary to release the liquid inside the reservoir, the heating module is activated to heat the liquid inside the reservoir body, accelerating the evaporation of the liquid into gas. The evaporated gas occupies the upper space to increase the internal gas pressure, thereby forcing the liquid out of the reservoir body from the inlet and outlet, thus releasing the liquid. This achieves effective control over the release and storage of liquid in the reservoir, enhances the liquid storage function, and meets the needs of different working conditions.
[0012] According to some embodiments of the present invention, the cooling module includes a first heat exchanger, which has a first heat exchange medium inlet and a first heat exchange medium outlet located outside the liquid storage tank body.
[0013] According to some embodiments of the present invention, the first heat exchange medium inlet and the first heat exchange medium outlet are respectively connected to a first connector.
[0014] According to some embodiments of the present invention, the first heat exchanger is a spiral coil structure, and the first heat exchanger is spirally arranged along the inner circumference of the liquid storage tank body.
[0015] According to some embodiments of the present invention, the heating module includes a second heat exchanger, which has a second heat exchange medium inlet and a second heat exchange medium outlet located outside the liquid reservoir body.
[0016] According to some embodiments of the present invention, the second heat exchange medium inlet and the second heat exchange medium outlet are respectively connected to a second connector.
[0017] According to some embodiments of the present invention, the second heat exchanger is a spiral coil structure, and the second heat exchanger is spirally arranged along the inner circumference of the liquid storage tank body.
[0018] According to some embodiments of the present invention, an exhaust needle valve is provided on the top of the liquid reservoir body.
[0019] According to some embodiments of this utility model, the wall of the liquid reservoir body is a pressure-bearing component.
[0020] According to some embodiments of the present invention, the liquid storage body includes a tank, an upper cover and a lower cover. The tank is cylindrical, and the upper cover and the lower cover are respectively connected to the upper and lower ends of the tank. The inner wall of the lower cover is a concave arc surface.
[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0023] Figure 1 A schematic diagram of an embodiment of a liquid receiver for a refrigeration system provided by this utility model;
[0024] Figure 2 for Figure 1 Sectional view of section AA;
[0025] Icon labels:
[0026] The container body 100; upper cover 110; tank body 120; lower cover 130; inlet and outlet 140; exhaust needle valve 150; first heat exchanger 160; first heat exchange medium inlet 161; first heat exchange medium outlet 162; first connector 163; second heat exchanger 170; second heat exchange medium inlet 171; second heat exchange medium outlet 172; second connector 173. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and 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.
[0029] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0031] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.
[0032] The receiver is used to store high-pressure liquid from the condenser, ensuring that the liquid does not overflow and flood the heat exchange surfaces inside the condenser, while also regulating and stabilizing the refrigerant circulation to adapt to changes in system operating conditions.
[0033] The driving force for the liquid storage function of a single-tube liquid receiver comes from the temperature difference between the refrigerant at the condenser outlet and the wall of the liquid receiver. When the heat pump unit is running normally, the ambient temperature of the liquid receiver is usually much lower than the condenser outlet temperature. Excess refrigerant from the heat pump operation will migrate to the liquid receiver due to the driving force generated by the temperature difference, so that the refrigeration system can operate stably.
[0034] However, when a plate heat exchanger is used in the condenser of a refrigeration system, there are situations where the performance of the liquid receiver affects the energy efficiency of the refrigeration system: The first situation is that when the unit is heating, the amount of refrigerant in heating is much more than that in cooling, which limits the liquid receiver's storage function, affects the normal operation of the refrigeration system, and results in very low energy efficiency due to excessively high condensing pressure; The second situation is that when the unit is cooling, the ambient temperature is very low, making it difficult for the refrigerant inside the liquid receiver to be released back into the refrigeration system, resulting in refrigerant shortage operation, which also leads to excessively low energy efficiency.
[0035] To address the aforementioned problems, this utility model proposes a liquid receiver for a refrigeration system, which effectively solves the problems of existing liquid receivers being limited by ambient temperature in releasing and storing liquid, failing to respond promptly, and having poor liquid storage function.
[0036] refer to Figure 1 and Figure 2 The present invention provides a liquid receiver for a refrigeration system, which is illustrated in the following embodiments:
[0037] A liquid receiver for a refrigeration system according to an embodiment of the present invention includes a liquid receiver body 100, a cooling module and a heating module.
[0038] Among them, such as Figure 1 As shown, the liquid reservoir body 100 of this embodiment is vertically arranged and sealed, including an upper cover 110, a tank 120, and a lower cover 130. The tank 120 is cylindrical, which makes the inner circumference of the tank 120 uniformly stressed, avoids excessive local stress, and improves the safety and stability of the liquid reservoir body 100. The upper cover 110 and the lower cover 130 are smoothly connected to the upper and lower ends of the tank 120, respectively. The inner sidewall of the lower cover 130 is a concave arc surface, which increases the volume to a certain extent while improving the stress resistance.
[0039] The lower part of the liquid reservoir body 100 is provided with an inlet and outlet 140, and the upper part is provided with an exhaust needle valve 150. In actual use, the stored liquid is located in the lower part of the liquid reservoir body 100, forming a liquid seal with the inlet and outlet 140. The inlet and outlet 140 are used to release and absorb liquid, and the exhaust needle valve 150 is used to discharge the gas above the liquid surface to adjust the gas pressure inside the liquid reservoir body 100. In the initial stage of use, the exhaust needle valve 150 can be used to discharge non-condensable gases and expand the liquid storage space.
[0040] The liquid storage tank body 100 is provided with a cooling module and a heating module from top to bottom. Due to gravity, the liquid stored in the liquid storage tank body 100 is located at the bottom and the gas is located at the top. The cooling module is located above the liquid surface and is used to cool the gas above the liquid surface inside the liquid storage tank body 100. The heating module is located below the liquid surface and is used to heat the liquid inside the liquid storage tank body 100.
[0041] The cooling module includes a first heat exchanger 160, which is a spiral coil structure. The two ends of the spiral coil are respectively provided with a first heat exchange medium inlet 161 and a first heat exchange medium outlet 162. By introducing heat exchange medium into the spiral coil, heat is conducted by utilizing the temperature difference between the heat exchange medium and the internal environment of the liquid storage body 100 to cool the gas inside the liquid storage body 100. The gas condenses on the inner wall of the liquid storage body 100 and the outer wall of the spiral coil, converting into liquid and reducing the volume occupied. At the same time, the gas pressure inside the bottle decreases, and liquid is absorbed from the inlet and outlet 140, thereby increasing the liquid storage capacity of the liquid storage tank. Therefore, the temperature of the heat exchange medium in the first heat exchanger 160 must be lower than the internal temperature of the liquid storage body 100 to achieve the cooling effect. In some other embodiments, the cooling module may adopt other structures, such as an air-cooled structure.
[0042] The aforementioned cooling spiral coil is located above the liquid level inside the liquid reservoir body 100, such as... Figure 2 As shown, the coil is spirally wound along the inner circumference of the cylindrical reservoir body 100, increasing the contact area between the first heat exchanger 160 and the internal gas, thereby uniformly cooling the gas and greatly improving the heat exchange efficiency. Furthermore, the first heat exchange medium inlet 161 and the first heat exchange medium outlet 162 extend out of the reservoir body 100 and are respectively connected to the first connector 163, which facilitates direct connection with external equipment. In this embodiment, the first heat exchange medium inlet 161 and the first heat exchange medium outlet 162 are in the horizontal direction, which helps to reduce the pressure inside the coil and facilitates the flow of the heat exchange medium. In some other embodiments, the first heat exchange medium inlet 161 and the first heat exchange medium outlet 162 may be in other directions, such as extending vertically at the top of the reservoir body 100.
[0043] The liquid receiver in this embodiment is mainly used in the refrigeration system. In order to improve the utilization rate of the refrigerant in the refrigeration system, the heat exchange medium introduced into the first heat exchanger 160 in this embodiment is the refrigerant of the refrigeration system. The first heat exchange medium inlet 161 of the first heat exchanger 160 is introduced into the low-temperature gas-liquid two-phase refrigerant that is throttled from the low-temperature pipeline or the low-temperature refrigerant gas from the evaporator outlet. It can be seen that the temperature of the heat exchange medium introduced into the first heat exchange medium inlet 161 is lower than the ambient temperature inside the liquid receiver body 100, which can effectively play a role in cooling and condensation. After the heat exchange medium completes heat exchange in the first heat exchanger 160, its temperature rises and it flows back into the refrigeration system pipeline, which can effectively realize the efficient utilization of the refrigerant and reduce heat loss.
[0044] Similarly, the heating module in this embodiment includes a second heat exchanger 170, which is a spiral coil structure. The two ends of the spiral coil are respectively provided with a second heat exchange medium inlet 171 and a second heat exchange medium outlet 172. By introducing heat exchange medium into the spiral coil, heat is conducted by the temperature difference between the heat exchange medium and the inside of the liquid storage body 100, thereby heating the liquid stored in the liquid storage body 100, accelerating the evaporation of the liquid, turning the liquid into gas, increasing the volume occupied, and at the same time increasing the gas pressure inside the bottle, thus causing the liquid to evaporate. Therefore, the temperature of the heat exchange medium in the second heat exchanger 170 must be higher than the ambient temperature inside the liquid storage body 100 to achieve the heating effect. In some other embodiments, the heating module may adopt other structures, such as an electric heating wire structure.
[0045] Among them, such as Figure 2 As shown, the aforementioned heating spiral coil is spirally wound around the cylindrical inner circumference of the liquid reservoir body 100, increasing the contact area between the second heat exchanger 170 and the internal liquid, thereby uniformly heating the gas and greatly improving the heat exchange efficiency. Furthermore, the second heat exchange medium inlet 171 and the second heat exchange medium outlet 172 extend out of the liquid reservoir body 100 and are respectively connected to the second connector 173, which facilitates direct connection with external equipment. In this embodiment, the second heat exchange medium inlet 171 and the second heat exchange medium outlet 172 are arranged in the horizontal direction, which helps to reduce the pressure inside the coil.
[0046] To improve the utilization rate of refrigerant in the refrigeration system, the heat exchange medium introduced into the second heat exchanger 170 in this embodiment is the refrigerant of the refrigeration system. The second heat exchange medium inlet 171 of the second heat exchanger 170 is introduced with high-temperature refrigerant bypassing the exhaust pipe. It can be seen that the temperature of the heat exchange medium introduced into the second heat exchange medium inlet 171 is higher than the ambient temperature inside the liquid receiver body 100, which can effectively play a heating role. After the heat exchange medium completes heat exchange in the second heat exchanger 170, its temperature decreases and it flows back into the refrigeration system pipeline, which can effectively realize the efficient utilization of refrigerant and reduce heat loss.
[0047] Furthermore, since the reservoir is a pressure vessel, the internal pressure changes significantly during use. In this embodiment, the wall of the reservoir body 100 is a pressure-bearing component to improve the safety and stability of the reservoir during use.
[0048] A method for using a liquid receiver in a refrigeration system according to this embodiment: Initially, the exhaust needle valve 150 is opened to release the existing non-condensable gas, improving the space utilization rate inside the liquid receiver body 100. The inlet and outlet 140 are located at the bottom of the liquid receiver body 100, forming a liquid seal between the inlet and outlet 140 and the liquid inside the liquid receiver body 100. When improved liquid storage performance is required, the cooling module is activated. Low-temperature two-phase refrigerant throttled from the low-temperature pipeline or low-temperature refrigerant gas from the evaporator outlet is introduced into the first heat exchange medium inlet 161 of the first heat exchanger 160 to cool the gas above the liquid surface inside the liquid receiver body 100, causing the gas to condense. The liquid inside the reservoir is reduced to allow liquid to be drawn in through inlet and outlet 140, thereby enhancing the liquid storage capacity. When it is necessary to release the liquid in the reservoir, the heating module is activated, and high-temperature refrigerant bypassing the exhaust pipe is introduced into the second heat exchange medium inlet 171 of the second heat exchanger 170 to heat the liquid inside the reservoir body 100, accelerating the liquid evaporation into gas. The evaporated gas occupies the upper space, increasing the internal gas pressure, so that the liquid is forced out of the reservoir body 100 through inlet and outlet 140, thereby releasing the liquid. By combining the above usage methods, effective control of liquid release and storage in the reservoir is achieved, enhancing liquid storage performance, improving liquid storage efficiency, and meeting different operating conditions.
[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A liquid receiver for a refrigeration system, characterized in that, include: The liquid reservoir body has an inlet and outlet at its bottom; A cooling module is located in the upper part of the liquid reservoir body. The cooling module is used to cool the gas above the liquid surface inside the liquid reservoir body. A heating module is located in the lower part of the liquid reservoir body, and the heating module is used to heat the liquid inside the liquid reservoir body.
2. A liquid receiver for a refrigeration system according to claim 1, characterized in that: The cooling module includes a first heat exchanger, which has a first heat exchange medium inlet and a first heat exchange medium outlet located outside the liquid storage tank body.
3. A liquid receiver for a refrigeration system according to claim 2, characterized in that: The first heat exchange medium inlet and the first heat exchange medium outlet are respectively connected to a first joint.
4. A liquid receiver for a refrigeration system according to claim 2, characterized in that: The first heat exchanger is a spiral coil structure, and the first heat exchanger is spirally arranged along the inner circumference of the liquid reservoir body.
5. A liquid receiver for a refrigeration system according to claim 1, characterized in that: The heating module includes a second heat exchanger, which has a second heat exchange medium inlet and a second heat exchange medium outlet located outside the liquid reservoir body.
6. A liquid receiver for a refrigeration system according to claim 5, characterized in that: The second heat exchange medium inlet and the second heat exchange medium outlet are respectively connected to a second connector.
7. A liquid receiver for a refrigeration system according to claim 5, characterized in that: The second heat exchanger is a spiral coil structure, and the second heat exchanger is spirally arranged along the inner circumference of the liquid reservoir body.
8. A liquid receiver for a refrigeration system according to claim 1, characterized in that: The top of the liquid reservoir body is equipped with an exhaust needle valve.
9. A liquid receiver for a refrigeration system according to claim 1, characterized in that: The wall of the liquid reservoir body is a pressure-bearing component.
10. A liquid receiver for a refrigeration system according to claim 1, characterized in that: The liquid storage container body includes a tank, an upper cover, and a lower cover. The tank is cylindrical, and the upper cover and the lower cover are respectively connected to the upper and lower ends of the tank. The inner wall of the lower cover is a concave arc surface.