Compressor with preheating device

Abstract

The utility model relates to the technical field of compressors, in particular to a compressor with a preheating device, which comprises a casing and an eccentric shaft arranged in the casing and driven by a motor to rotate, an oil pool is arranged at the bottom of the casing, the preheating device is arranged at the position of the oil pool, and the preheating device comprises an electromagnetic induction coil and a heat generation component with electrical conductivity and magnetic conductivity. The electromagnetic induction coil is wound at the bottom of the machine shell, and the heat generation component is arranged in the oil pool. The electromagnetic induction coil and the heat generation component are arranged, before the compressor is started, the electromagnetic induction coil is used for conducting electromagnetic induction heating on the heat generation component, heat generated by the heat generation component is directly transmitted to refrigerant oil in the oil pool, and the direct heating mode can reduce heat loss and improve the preheating effect of the refrigerant oil.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a compressor with a preheating device. Background Technology

[0002] Scroll compressors are high-efficiency compressors widely used in air conditioning, refrigeration, and heat pump systems. The delivery and distribution of refrigerant oil in scroll compressors is crucial to ensure adequate lubrication of all moving parts, reduce friction and wear, and extend the compressor's lifespan. A sump for storing refrigerant oil is typically located at the bottom of a scroll compressor. However, when the compressor operates at low temperatures, the internal refrigerant oil can become viscous or even solidify, making the compressor difficult to start.

[0003] To address the problem of compressors struggling to start at low temperatures, several solutions have been proposed in the prior art. For example, patent application number CN201720230753.0 discloses a compressor with a preheating device. The compressor described in this patent has a thick-film heating element on its outer surface. The high resistance of the thick-film heating element generates heat, quickly preheating the compressor to a suitable starting temperature and accelerating the compressor's response time for low-temperature startup.

[0004] However, the aforementioned compressors with preheating devices still have some problems. Specifically, the heat generated by the thick-film heating element is mainly concentrated on the outside of the compressor, and then conducted to the inside of the compressor through the heat-conducting plate or the compressor's own casing. This heat transfer method results in a large portion of the heat being directly dissipated into the surrounding air, failing to be effectively conducted to the refrigerant oil inside the compressor, making the preheating effect of the refrigerant oil less than ideal. Therefore, a compressor with a preheating device that has better waste heat recovery is needed. Utility Model Content

[0005] The purpose of this invention is to provide a compressor with a preheating device to solve the problems mentioned in the background art.

[0006] This utility model is achieved through the following technical solution:

[0007] A compressor with a preheating device includes a housing and an eccentric shaft disposed within the housing and driven to rotate by an electric motor. The bottom of the housing is an oil sump. The preheating device is disposed at the oil sump. The preheating device includes an electromagnetic induction coil and a heat-generating component with electrical conductivity and magnetic permeability. The electromagnetic induction coil is wound around the bottom of the housing, and the heat-generating component is placed in the oil sump.

[0008] Optionally, the heating component is fixedly connected to the eccentric shaft, and an arc-shaped liquid inlet pipe is provided at the bottom of the heating component. One end of the liquid inlet pipe is connected to the heating component, and the other end of the liquid inlet pipe is provided with a liquid inlet. The end of the liquid inlet pipe connected to the heating component is connected to the part of the compressor that needs lubrication through a liquid channel.

[0009] Optionally, the heat-generating component is located in the middle of the oil tank, and a strip-shaped heat-conducting component is fixedly connected to the side wall of the heat-generating component. One end of the heat-conducting component is connected to the heat-generating component, and the other end of the heat-conducting component extends toward the edge of the oil tank.

[0010] Optionally, the liquid-facing surface of the heat-conducting component when it rotates with the heat-generating component is a pointed cone structure, and the liquid-repellent surface of the heat-conducting component when it rotates with the heat-generating component is provided with heat dissipation protrusions.

[0011] Optionally, a hollow layer is provided at the bottom of the housing, and the hollow layer covers the outside of the oil sump.

[0012] Optionally, a protective cover is fixedly provided at the bottom of the housing, and the protective cover is fitted over the electromagnetic induction coil.

[0013] Compared with the prior art, the present invention provides a compressor with a preheating device, which has the following advantages:

[0014] 1. This utility model, by setting up an electromagnetic induction coil and a heating component, uses the electromagnetic induction coil to electromagnetically heat the heating component before the compressor starts. The heat generated by the heating component is directly transferred to the refrigeration oil in the oil sump. This direct heating method can reduce heat loss and improve the preheating effect of the refrigeration oil.

[0015] 2. When the electric motor drives the eccentric shaft to rotate, the heating element and the liquid inlet pipe rotate together with the eccentric shaft. The refrigeration oil can enter the liquid inlet pipe through the liquid inlet and then be directly delivered to the location requiring lubrication through the liquid channel. In addition, the rotating heating element can better dissipate heat into the refrigeration oil, allowing the refrigeration oil to reach the required temperature more quickly.

[0016] 3. This utility model provides a conical structure and a heat dissipation protrusion on the heat-conducting component. The conical structure reduces the resistance when the heat-conducting component rotates, while the heat dissipation protrusion increases the heat dissipation efficiency of the heat-conducting component, allowing heat to be dissipated into the refrigeration oil more quickly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0018] Figure 2This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the heat-generating component, liquid inlet pipe, and heat-conducting component of this utility model.

[0020] In the diagram: 1. Housing; 2. Eccentric shaft; 3. Oil sump; 4. Motor; 5. Electromagnetic induction coil; 6. Heating component; 7. Liquid inlet pipe; 70. Liquid inlet; 8. Heat-conducting component; 80. Conical structure; 81. Heat dissipation protrusion; 9. Hollow layer; 10. Protective cover. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figures 1 to 3 According to an embodiment of the present invention, a compressor with a preheating device is provided, which includes a housing 1 and an eccentric shaft 2 disposed in the housing 1 and driven to rotate by an electric motor 4. The eccentric shaft 2 is a common power transmission component in the compressor. Its main function is to convert the rotational motion of the electric motor 4 into the planetary motion of the moving scroll plate in the compressor. Its specific working mechanism will not be described in detail here. The bottom of the housing 1 is an oil sump 3. The preheating device is disposed in the oil sump 3. The preheating device includes an electromagnetic induction coil 5 and a heat-generating component 6 with conductivity and magnetism. The electromagnetic induction coil 5 is wound around the bottom of the housing 1, and the heat-generating component 6 is placed in the oil sump 3.

[0023] The compressor with the preheating device using the above structure uses electromagnetic induction coil 5 to electromagnetically heat the heating component 6 before the compressor starts. The heat generated by the heating component 6 is directly transferred to the refrigeration oil in the oil tank 3. This direct heating method can reduce heat loss and improve the preheating effect of the refrigeration oil.

[0024] In this exemplary embodiment, the heating element 6 is fixedly connected to the eccentric shaft 2. An arc-shaped liquid inlet pipe 7 is provided at the bottom of the heating element 6. One end of the liquid inlet pipe 7 is connected to the heating element 6, and the other end of the liquid inlet pipe 7 is provided with a liquid inlet 70. The end of the liquid inlet pipe 7 connected to the heating element 6 is connected to the part inside the compressor that needs lubrication through a liquid channel. With this configuration, when the compressor starts, the motor 4 drives the eccentric shaft 2 to rotate. The heating element 6 and the liquid inlet pipe 7 rotate together with the eccentric shaft 2. Refrigeration oil can enter the liquid inlet pipe 7 through the liquid inlet 70 and then be directly delivered to the location requiring lubrication (e.g., between the crankshaft and bearings; the contact surface between the fixed scroll plate and the moving scroll plate) through the liquid channel. Furthermore, the rotating heating element 6 can better dissipate heat into the refrigeration oil, allowing the refrigeration oil to reach the required temperature more quickly.

[0025] Since the temperature of the refrigeration oil may be slightly lower than the set temperature during the initial startup of the compressor, in order to make the temperature of the refrigeration oil reach the set temperature as quickly as possible, in this exemplary embodiment, the heat-generating component 6 is located in the middle of the oil sump 3, and a strip-shaped heat-conducting component 8 is fixedly connected to the side wall of the heat-generating component 6. One end of the heat-conducting component 8 is connected to the heat-generating component 6, and the other end of the heat-conducting component 8 extends towards the edge of the oil sump 3. With this configuration, the heat-generating component 6 conducts heat to the heat-conducting component 8. As the heat-conducting component 8 rotates, it can more quickly and evenly dissipate heat into the refrigeration oil, causing the temperature of the refrigeration oil to reach the set temperature more rapidly.

[0026] In this exemplary embodiment, the liquid-facing surface of the heat-conducting component 8 when it rotates with the heat-generating component 6 is a pointed cone structure 80, and the liquid-repellent surface of the heat-conducting component 8 when it rotates with the heat-generating component 6 is provided with a heat dissipation protrusion 81. With this configuration, the pointed cone structure 80 can reduce the resistance when the heat-conducting component 8 rotates, and the heat dissipation protrusion 81 can increase the heat dissipation efficiency of the heat-conducting component 8, so that heat can be dissipated into the refrigeration oil more quickly.

[0027] In this exemplary embodiment, a hollow layer 9 is provided at the bottom of the housing 1, which covers the outside of the oil tank 3. Specifically, the hollow layer 9 can be in a vacuum state, which can reduce the rate of heat exchange between the oil tank 3 and the external environment, thereby reducing heat loss and ensuring optimal preheating effect.

[0028] In this exemplary embodiment, a protective cover 10 is fixedly provided at the bottom of the housing 1, and the protective cover 10 is fitted over the electromagnetic induction coil 5. The protective cover 10 can protect the electromagnetic induction coil 5, prevent the electromagnetic induction coil 5 from being damaged by external forces, and extend the service life of the compressor.

[0029] In order to better obtain the temperature of the refrigeration oil in the compressor and thus determine whether the preheating device needs to be activated, in this example, the preheating device also includes a temperature sensor. The temperature sensor is set in the oil sump 3. The temperature sensor is mainly used to determine the temperature of the refrigeration oil in the oil sump 3 and whether the compressor is operating at a low temperature. When the compressor is detected to be operating at a low temperature, the electromagnetic induction coil 5 is activated to quickly preheat the compressor.

[0030] Working Principle: Before the compressor starts, the heating element 6 is electromagnetically heated by the electromagnetic induction coil 5. The heat generated by the heating element 6 is directly transferred to the refrigerant oil in the oil sump 3. This direct heating method reduces heat loss and improves the preheating effect of the refrigerant oil. At the initial stage of compressor startup, the motor 4 drives the eccentric shaft 2 to rotate. The heating element 6 and the liquid inlet pipe 7 rotate together with the eccentric shaft 2. The refrigerant oil can enter the liquid inlet pipe 7 through the liquid inlet 70 and then be directly delivered to the location requiring lubrication through the liquid channel. Simultaneously, the heating element 6 conducts heat to the heat-conducting element 8. As the heat-conducting element 8 rotates, it can more quickly and evenly distribute heat to the refrigerant oil, causing the refrigerant oil temperature to reach the set temperature more rapidly.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compressor having a preheating device, characterized in that, The device includes a housing (1) and an eccentric shaft (2) located inside the housing (1) and driven to rotate by an electric motor (4). The bottom of the housing (1) is an oil tank (3). The preheating device is located in the oil tank (3). The preheating device includes an electromagnetic induction coil (5) and a heat-generating component (6) that is conductive and magnetic. The electromagnetic induction coil (5) is wound around the bottom of the housing (1), and the heat-generating component (6) is placed inside the oil tank (3).

2. The compressor with a preheating device according to claim 1, characterized in that: The heating component (6) is fixedly connected to the eccentric shaft (2). An arc-shaped liquid inlet pipe (7) is provided at the bottom of the heating component (6). One end of the liquid inlet pipe (7) is connected to the heating component (6), and the other end of the liquid inlet pipe (7) is provided with a liquid inlet (70). The end of the liquid inlet pipe (7) connected to the heating component (6) is connected to the part of the compressor that needs lubrication through a liquid channel.

3. The compressor with a preheating device according to claim 1, characterized in that: The heat-generating component (6) is located in the middle of the oil tank (3). A strip-shaped heat-conducting component (8) is fixedly connected to the side wall of the heat-generating component (6). One end of the heat-conducting component (8) is connected to the heat-generating component (6), and the other end of the heat-conducting component (8) extends toward the edge of the oil tank (3).

4. The compressor with a preheating device according to claim 3, characterized in that: The heat-conducting component (8) has a pointed cone structure (80) on its liquid-facing surface when it rotates with the heat-generating component (6), and a heat dissipation protrusion (81) is provided on its liquid-repellent surface when it rotates with the heat-generating component (6).

5. The compressor with a preheating device according to any one of claims 1 to 4, characterized in that: The bottom of the housing (1) is provided with a hollow layer (9), which covers the outside of the oil tank (3).

6. The compressor with a preheating device according to any one of claims 1 to 4, characterized in that: A protective cover (10) is fixedly provided at the bottom of the housing (1), and the protective cover (10) is fitted over the outside of the electromagnetic induction coil (5).

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