Refrigerating system and compressor thereof
By installing a heating device inside the compressor housing to directly heat the mixture of refrigerant and engine oil, the problem of low heating efficiency in existing technologies is solved, and the compressor's starting performance is improved.
Patent Information
- Application Number
- CN202422310995.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In existing rotary compressors, the mixture of refrigerant and oil is difficult to separate effectively before startup, resulting in low heating efficiency and affecting the compressor's startup performance.
A first heating device is installed inside the compressor housing to directly heat the mixture of refrigerant and engine oil, ensuring that the heating device is in direct contact with the mixture and improving heating efficiency.
By directly heating the mixture of refrigerant and engine oil, the oil concentration is ensured to meet the starting requirements, thereby improving the compressor's starting endurance and efficiency.
Smart Images
Figure CN223564494U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fluid machinery technical field especially relates to a refrigeration system and compressor thereof. BACKGROUND
[0002] At present, the mixture of refrigerant and oil will accumulate in the bottom of the inner cavity of the rotor compressor. In order to make the concentration of oil meet the starting requirements before the starting of the compressor, the mixture of refrigerant and oil is usually heated to separate the refrigerant and oil. Generally, the motor of the compressor is used to heat the mixture of refrigerant and oil, however, the motor of the rotor compressor is located at the upper part of the compressor, and the heating effect on the mixture of refrigerant and oil is poor. SUMMARY
[0003] The utility model discloses a refrigeration system and compressor thereof, can directly heat the mixture of refrigerant and oil, improve heating efficiency.
[0004] In order to realize the above-mentioned purpose, the utility model provides a compressor, including:
[0005] The shell has a first inner cavity;
[0006] The first heating device is arranged in the first inner cavity, and the first heating device is arranged on the cavity wall of the first inner cavity;
[0007] The cylinder is arranged in the first inner cavity and located at the lower part of the shell;
[0008] The motor is arranged in the first inner cavity, and the motor is arranged above and below the cylinder;
[0009] The rotating shaft connects the motor and the cylinder;
[0010] The main bearing is sleeved on the rotating shaft, and the main bearing is located at the top of the cylinder;
[0011] Wherein, the distance between the end of the main bearing away from the bottom of the shell and the inner bottom of the shell is L1 mm, the distance between the end of the first heating device close to the bottom of the shell and the inner bottom of the shell is D1 mm, and 0.3≤D1 / L1≤0.7 is satisfied.
[0012] In some embodiments of the application:
[0013] The first heating device is annular with a notch, the two ends of the first heating device have first terminal posts, and the first terminal posts pass through the shell.
[0014] In some embodiments of the application:
[0015] The first heating device is in a spiral shape, and both ends of the first heating device have first terminal posts which pass through the shell.
[0016] In some embodiments of the present application:
[0017] The power of the first heating device is P W, the working volume of the compressor is Vst cc, and the maximum cross-sectional area of the shell 1 is S mm 2 The minimum use evaporation temperature of the system carrying the compressor is T K;
[0018] 4≤P / Vst≤12, 0.5%≤P / S≤2%, and (280-T)*5≤P≤(280-T)*50 are satisfied.
[0019] The maximum outer diameter of the shell is 130-200 mm, and the working volume of the compressor is 50-200 cc.
[0020] In some embodiments of the present application, the compressor further comprises:
[0021] A temperature sensor is arranged on the shell, and the temperature sensor is used to detect the temperature of the oil pool.
[0022] In some embodiments of the present application:
[0023] A connecting piece is further arranged on the shell, and the connecting piece is used to connect the temperature sensor.
[0024] In some embodiments of the present application, the compressor further comprises:
[0025] The suction muffler has a second inner cavity;
[0026] The suction pipe has a port at one end located in the second inner cavity and a port at the other end in communication with the cylinder;
[0027] The second heating device is located in the second inner cavity, and the second heating device is arranged on the cavity wall of the second inner cavity.
[0028] The distance between the second heating device and the inner bottom of the suction muffler is D2 mm, the distance between the top and the bottom inside the suction muffler is L2 mm, and 0.3≤D2 / L2≤0.7 is satisfied.
[0029] In some embodiments of the present application:
[0030] The second heating device is in a ring shape with a notch, and both ends of the second heating device have second terminal posts which pass through the cavity wall of the second inner cavity.
[0031] Some embodiments of the present application:
[0032] The second heating device is in a spiral shape, and two ends of the second heating device are provided with second terminal posts which pass through the cavity wall of the second inner cavity.
[0033] The utility model also provides a refrigeration system, including the compressor of any one segment as above.
[0034] The utility model provides a refrigeration system and compressor thereof, compared with prior art, its beneficial effect lies in:
[0035] The compressor of the utility model, including shell, first heating device, cylinder and motor, first heating device, cylinder and motor set up in the inside of shell, first heating device sets up on the cavity wall of the first inner cavity of shell, the distance between the upper end surface of cylinder and the bottom of shell is L1mm, record the distance between first heating device and the bottom of shell is D1mm, satisfy: 0.3≤D1 / L1≤0.7.Through such structure, can let first heating device immerse in the mixture of refrigerant and oil, directly to the mixture of refrigerant and oil heating, improve heating efficiency.
[0036] The refrigeration system of the utility model, including the compressor above, can let first heating device immerse in the mixture of refrigerant and oil, directly to the mixture of refrigerant and oil heating, improve heating efficiency, ensure the oil concentration before the start of compressor, to improve the start endurance of compressor. BRIEF DESCRIPTION OF DRAWINGS
[0037] Figure 1 It is the schematic diagram of the compressor of the utility model embodiment.
[0038] Figure 2 It is the schematic diagram of another angle of the compressor of the utility model embodiment.
[0039] Figure 3 It is the internal structure schematic diagram of the compressor of the utility model embodiment.
[0040] Figure 4 It is the structure schematic diagram of first heating device of the utility model embodiment.
[0041] Figure 5 It is the structure schematic diagram of another implementation of first heating device of the utility model embodiment.
[0042] Figure 6 It is the structure schematic diagram of second heating device of the utility model embodiment.
[0043] Figure 7 It is the structure schematic diagram of another implementation of second heating device of the utility model embodiment.
[0044] In the figure, 1, the shell; 2, the first heating device; 3, cylinder; 4, motor; 5, oil pool; 6, connecting piece; 7, suction muffler; 8, suction pipe; 9, second heating device.
[0045] 11, the first inner cavity; 21, the first terminal post; 31, main bearing; 71, the second inner cavity; 91, the second terminal post. DETAILED DESCRIPTION
[0046] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0047] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0048] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0049] In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.
[0050] For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0051] Please refer to Figures 1-3 The compressor of the present application embodiment preferably comprises a shell 1, a first heating device 2, a cylinder 3, a rotating shaft, a main bearing 31 and a motor 4.
[0052] The shell 1 has a first inner cavity 11.
[0053] The first heating device 2 is arranged in the first inner cavity 11 and surrounds the cavity wall of the first inner cavity 11.
[0054] The cylinder 3 is arranged in the first inner cavity 11 and is located at the lower part of the shell 1.
[0055] The motor 4 is arranged in the first inner cavity 11 and is arranged above or below the cylinder 3.
[0056] The motor 4 and the cylinder 3 are connected through a rotating shaft.
[0057] The main bearing 31 is sleeved on the rotating shaft and is located at the top of the cylinder 3.
[0058] In the embodiment, the shell 1 is composed of a top shell, a main shell and a bottom shell, and the top shell, the main shell and the bottom shell jointly form the first inner cavity 11.
[0059] Please refer to Figure 3 In the embodiment, the top shell is open at the bottom and is arc-shaped at the top. The bottom shell is open at the top and is arc-shaped at the bottom. The main shell is cylindrical and is open at both ends. The top shell is arranged on the top opening of the main shell, and the bottom shell is arranged on the bottom opening of the main shell, thereby forming a closed shell 1.
[0060] In the prior art, the motor 4 is usually used to heat the mixture of refrigerant and oil, but the motor 4 is located at the middle and upper part of the shell 1 and does not directly contact the mixture of refrigerant and oil, so the heating effect is poor.
[0061] In the prior art, a part of the heating belt is arranged around the outer wall of the shell 1, but the surface of the compressor is covered with sound insulation material, so this arrangement can cause the heating belt to ignite the sound insulation material.
[0062] The first heating device 2 of the embodiment is arranged inside the shell 1, so there is no problem of igniting the sound insulation material around the sound insulation material, and the heat radiation of the first heating device 2 to the air can be reduced, the heat loss can be reduced, and the heating effect can be improved.
[0063] At least a part of the cylinder 3 is immersed in the mixture of refrigerant and oil.
[0064] In the embodiment, the distance between the end of the main bearing 31 away from the bottom of the shell 1 and the inner bottom of the shell 1 is L1 mm, the distance between the end of the first heating device 2 close to the bottom of the shell 1 and the inner bottom of the shell 1 is D1 mm, and 0.3≤D1 / L1≤0.7 is satisfied.
[0065] In the embodiment, the end of the main bearing 31 away from the bottom of the shell 1 is the upper end face of the main bearing 31.
[0066] When the range is satisfied, the first heating device 2 can be in direct contact with the mixture of refrigerant and oil, and thus can provide a good heating effect on the mixture of refrigerant and oil.
[0067] When measuring L1, the distance between the upper end surface of the main bearing 31 and the lowest point of the inner bottom of the housing 1 is measured by a length measuring tool such as a ruler, a tape measure, or the like, and the measurement is averaged.
[0068] When measuring D1, the distance between the lowest point of the first heating device 2 and the lowest point of the inner bottom of the housing 1 is measured by a length measuring tool such as a ruler, a tape measure, or the like, and the measurement is averaged.
[0069] The compressor of the utility model, through such structure, can make the first heating device 2 immerse in the mixture of refrigerant and oil, directly heat the mixture of refrigerant and oil, reduce heat loss, improve heating efficiency, so that the refrigerant in the mixture of refrigerant and oil can be heated and separated from the oil, improve the concentration of the oil, ensure the oil concentration before the start of the compressor, so as to improve the starting endurance of the compressor.
[0070] Regarding the selection of the first heating device 2, the following examples can be referred to:
[0071] The maximum outer diameter of the housing 1 of the compressor is 130-200mm, and the working volume is 50-200cc;
[0072] The relationship between the power of the first heating device 2 and the working volume of the compressor is:
[0073] 4(W / cc)≤P / Vst≤12(W / cc);
[0074] Wherein, P(W) is the power of the first heating device 2, and Vst(cc) is the working volume of the compressor.
[0075] The relationship between the power of the first heating device 2 and the maximum cross-sectional area of the compressor housing 1 is:
[0076] 0.5%(W / mm 2 )≤P / S≤2%(W / mm 2 );
[0077] Wherein, P(W) is the power of the first heating device 2, and S(mm 2 ) is the maximum cross-sectional area of the housing 1. The outer contour of the cross section of the housing 1 is circular, and S(mm 2 ) can be calculated according to the maximum outer diameter of the housing 1.
[0078] The relationship between the power of the first heating device 2 and the lowest use evaporation temperature of the system with the compressor is:
[0079] (280-T)*5≤P≤(280-T)*50;
[0080] Wherein, P(W) is the power of the first heating device 2, T(K) is the minimum use evaporation temperature of the system with the compressor.
[0081] In this way, the heating time of the first heating device 2 can be shortened to five minutes, which is several hours shorter than the heating method using the motor 4 in the prior art, thereby reducing the time cost. Compared with the method of arranging the heating belt outside the shell 1, the fire hazard can be avoided.
[0082] In some embodiments, referring to Figure 4 , the first heating device 2 is a heating belt, the first heating device 2 is annular with a notch, and the first heating device 2 has two first terminal posts 21, and the first terminal posts 21 pass through the shell 1.
[0083] The first terminal posts 21 pass through the shell 1 from the first inner cavity 11 to the outside of the shell 1, and the first terminal posts 21 are used to supply power to the first heating device 2. The two first terminal posts 21 can be arranged on the same horizontal plane.
[0084] In some embodiments, referring to Figure 5 , the first heating device 2 is a heating belt, the first heating device 2 is annular with a notch, and the first heating device 2 has two first terminal posts 21, and the first terminal posts 21 pass through the shell 1.
[0085] In this case, the two first terminal posts 21 are arranged above and below, respectively pass through the shell 1 from the first inner cavity 11 to the outside of the shell 1, and are used to supply power to the first heating device 2.
[0086] The middle and lower parts of the shell 1 form an oil pool 5, a part of the cylinder 3 is located in the oil pool 5, and the first heating device 2 is located in the oil pool 5.
[0087] According to the embodiment, the shell 1 composed of a top shell, a main shell and a bottom shell, the oil pool 5 is formed by the bottom shell and the middle and lower parts of the main shell 1, and the oil pool 5 is also in the first inner cavity 11.
[0088] The first heating belt is arranged in the middle of the oil pool 5, which can obtain better heating effect.
[0089] The compressor of the embodiment further comprises a temperature sensor, the temperature sensor is arranged on the shell 1, and the temperature sensor is used to detect the temperature of the oil pool 5.
[0090] The shell 1 is further provided with a connecting piece 6, and the connecting piece 6 is used to connect the temperature sensor.
[0091] The connecting piece 6 is formed in a clamping groove shape, and the temperature sensor is mounted on the connecting piece 6.
[0092] The compressor of the embodiment further comprises a suction muffler 7 and a suction pipe 8. The suction muffler 7 has a second inner cavity 71. The port of one end of the suction pipe 8 is located in the second inner cavity 71, and the port of the other end of the suction pipe 8 is communicated with the cylinder 3.
[0093] The suction pipe 8 is vertically arranged, and the port of the suction pipe 8 is located in the upper middle part of the second inner cavity 71.
[0094] The compressor further comprises a second heating device 9. The second heating device 9 is located in the second inner cavity 71, and the second heating device 9 is arranged on the cavity wall of the second inner cavity 71.
[0095] The arrangement of the second heating device 9 is similar to that of the first heating device 2, and is also used for heating the mixture of the refrigerant and the oil in the suction muffler 7.
[0096] In the embodiment, the distance between the second heating device 9 and the inner bottom of the suction muffler 7 is D2 mm, the distance between the top and the bottom inside the suction muffler 7 is L2 mm, and the following condition is satisfied: 0.3≤D2 / L2≤0.7.
[0097] When the range is satisfied, the second heating device 9 can be directly contacted with the mixture of the refrigerant and the oil, and thus can provide a better heating effect on the mixture of the refrigerant and the oil. Otherwise, if D2 / L2>0.7, the oil amount in the oil pool 5 is insufficient, which can cause the second heating device 9 to be dry burning, and the second heating device 9 and the organic material components inside the compressor are easily damaged due to the sharp increase in temperature.
[0098] When measuring L2, the distance between the highest point of the top and the lowest point of the bottom inside the suction muffler 7 is measured by a length measuring tool such as a ruler or a tape measure, and the average value is obtained by measuring multiple times.
[0099] When measuring D2, the distance between the lowest point of the second heating device 9 and the lowest point of the inner bottom of the suction muffler 7 is measured by a length measuring tool such as a ruler or a tape measure, and the average value is obtained by measuring multiple times.
[0100] In some embodiments, referring to Figure 6 , the second heating device 9 is also a heating belt, the second heating device 9 is annular with a notch, and the second heating device 9 has second terminal posts 91 at two ends thereof. The second terminal posts 91 pass through the cavity wall of the second inner cavity 71 to the outside of the suction muffler 7.
[0101] The second terminal posts 91 are used for supplying power to the second heating device 9. The two second terminal posts 91 can be arranged on the same horizontal plane.
[0102] In some embodiments, referring to Figure 7The second heating device 9 is a heating belt, the second heating device 9 is in a spiral shape, and the two ends of the second heating device 9 are provided with second connecting posts 91 which pass through the cavity wall of the second inner cavity 71 to the outside of the suction muffler 7.
[0103] In this case, the two second connecting posts 91 are arranged above and below respectively and pass through the cavity wall of the second inner cavity 71 to the outside of the suction muffler 7, and are used to supply power to the second heating device 9.
[0104] The second heating belt can be arranged at an intermediate position between the liquid level and the bottom of the suction muffler 7 to obtain a better heating effect.
[0105] The embodiment also provides an example of a method for using the first heating device 2.
[0106] Before the compressor is started, the compressor is first powered on to give the system a working instruction. Then the first heating device 2 is operated to heat the mixture of refrigerant and oil, and the compressor is stopped. Finally, the temperature of the mixture of refrigerant and oil is detected by the temperature sensor, and the temperature is compared with the ambient temperature. When the temperature of the mixture of refrigerant and oil detected by the temperature sensor is higher than the ambient temperature by 15℃, the first heating device 2 stops working, and the compressor is started.
[0107] When the compressor is running, it enters a defrosting state, the condenser and the evaporator are instantaneously exchanged, at this time a large amount of refrigerant rushes into the compressor, and the oil concentration in the compressor is reduced. At this time, the first heating device 2 can be operated to quickly heat the mixture of refrigerant and oil, thereby shortening the defrosting time and ensuring the oil concentration in the compressor. The specific use method is as follows: when the compressor and the first heating device 2 are both in a working state, and the temperature of the shell 1 is less than 115℃, the first heating device 2 will remain in a working state until the defrosting state stops. When the defrosting state stops, it will enter a heating working condition. If the difference between the temperature of the shell 1 and the ambient temperature is less than 15℃ when entering the heating working condition, the first heating device 2 remains in a working state until the difference between the temperature of the shell 1 and the ambient temperature is greater than 15℃, and the first heating device 2 stops working.
[0108] For the case where the second heating device 9 is arranged, the second heating device 9 works synchronously with the first heating device 2, in other words, the second heating device 9 is controlled to work at the same time when the first heating device 2 is controlled to work, and the second heating device 9 is controlled to stop working at the same time when the first heating device 2 is controlled to stop working.
[0109] The embodiment also provides a refrigeration system comprising the above-mentioned compressor, so that the first heating device 2 can be immersed in the mixture of refrigerant and oil to directly heat the mixture of refrigerant and oil, thereby improving the heating efficiency and ensuring the oil concentration before the compressor is started, so as to improve the starting endurance of the compressor.
[0110] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should also be considered as the protection scope of the present application.
Claims
1. A compressor characterized by, Comprising: a housing having a first inner cavity; a first heating device arranged in the first inner cavity, and the first heating device is arranged on the cavity wall of the first inner cavity; a cylinder arranged in the first inner cavity and located at the lower part of the housing; a motor arranged in the first inner cavity, and the motor is arranged above and below the cylinder; a rotating shaft connecting the motor and the cylinder; a main bearing sleeved on the rotating shaft, and the main bearing is located at the top of the cylinder; wherein the distance between the end of the main bearing away from the bottom of the housing and the inner bottom of the housing is L1 mm, and the distance between the end of the first heating device close to the bottom of the housing and the inner bottom of the housing is D1 mm, satisfying: 0.3≤D1 / L1≤0.
7.
2. The compressor according to claim 1, wherein: the first heating device is annular with a notch, and both ends of the first heating device have first terminal posts which are arranged through the housing.
3. The compressor according to claim 1, wherein: the first heating device is spiral, and both ends of the first heating device have first terminal posts which are arranged through the housing.
4. The compressor according to claim 1, wherein: wherein the power of the first heating device is denoted P W, the swept volume of the compressor is denoted Vst cc, the largest cross-sectional area of the housing is denoted S mm2, the minimum use evaporation temperature of the system in which the compressor is installed is denoted T K 2 , the minimum use evaporation temperature of the system in which the compressor is installed is denoted T K satisfying: 4≤P / Vst≤12, 0.5%≤P / S≤2%, (280-T)*5≤P≤(280-T)*50; wherein the maximum outer diameter of the housing is 130-200 mm, and the working volume of the compressor is 50-200 cc.
5. The compressor of claim 1, wherein, Further comprising: a temperature sensor arranged on the housing, and the temperature sensor is used for detecting the temperature of the oil pool.
6. The compressor according to claim 5, wherein: the housing is further provided with a connecting piece, and the connecting piece is used for connecting the temperature sensor.
7. The compressor of claim 1, wherein Further comprising: a suction muffler having a second inner cavity; a suction pipe, one end of which is provided with a port in the second inner cavity, and the other end of which is provided with a port communicating with the cylinder; a second heating device arranged in the second inner cavity, and the second heating device is arranged on the cavity wall of the second inner cavity; wherein the distance between the second heating device and the inner bottom of the suction muffler is D2 mm, and the distance between the top and the bottom inside the suction muffler is L2 mm, satisfying: 0.3≤D2 / L2≤0.
7.
8. The compressor according to claim 7, wherein: the second heating device is annular with a notch, and both ends of the second heating device have second terminal posts which are arranged through the cavity wall of the second inner cavity.
9. The compressor according to claim 7, wherein: the second heating device is spiral, and both ends of the second heating device have second terminal posts which are arranged through the cavity wall of the second inner cavity.
10. A refrigeration system characterized by, Comprising the compressor according to any one of claims 1-9.