Compressor protection device, compressor and air conditioner

Abstract

The present invention provides a compressor protection device, a compressor, and an air conditioner, which relate to the technical field of air conditioners and solve the technical problems existing in the prior art, namely, that the exhaust temperature of the compressor is too high, the structure of the existing compressor thermal protector is relatively complex, and the service life of the compressor is also affected. The compressor protection device includes a flange valve seat, a valve plate, and a protection body; the protection body is assembled between the flange valve seat and the valve plate; the protection body can produce elastic deformation to separate the flange valve seat and the valve plate from each other, so that the exhaust hole of the compressor is connected to the outside world. By assembling the protection body between the flange valve seat and the valve plate, the present invention has a relatively simple structure, reduces the exhaust temperature of the compressor, avoids the abnormal phenomenon of burning the motor and wearing the pump body, and increases the service life of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a compressor protection device, a compressor and an air conditioner. Background Art

[0002] When operating in an air conditioning system, existing compressors can experience increased load and exhaust temperature when exposed to refrigerant leaks, abnormal fan speeds, or blocked air outlets. This can lead to abnormalities such as motor burnout and pump wear. To ensure smooth air conditioning operation, a thermal protector is typically built into the compressor. However, this device is complex and shuts down the compressor for protection when its internal temperature exceeds a specified limit. Because the temperature inside the compressor cylinder is difficult to dissipate, it takes a long time for the compressor to resume operation after a protective shutdown. Repeated restarts can damage the compressor.

[0003] The applicant has discovered that the prior art has at least the following technical problems:

[0004] Due to changes in the air-conditioning system and the external environment, the compressor exhaust temperature is too high. The existing compressor thermal protector structure is relatively complex, which also affects the service life of the compressor. Summary of the Invention

[0005] The present invention aims to provide a compressor protection device, a compressor, and an air conditioner to address the technical issues of excessively high compressor exhaust temperatures, the complex structure of existing compressor thermal protectors, and the resulting shortened compressor lifespan. The various technical advantages of the preferred technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The compressor protection device provided by the present invention includes a flange valve seat, a valve plate and a protection body; the protection body is assembled between the flange valve seat and the valve plate; the protection body can produce elastic deformation to separate the flange valve seat and the valve plate from each other, so that the exhaust hole of the compressor is connected to the outside world.

[0008] Optionally, the thermal expansion coefficient of the protection body is greater than the thermal expansion coefficients of the flange valve seat and the valve plate.

[0009] Optionally, the protective body is made of zinc or cadmium.

[0010] Optionally, there are multiple protective bodies.

[0011] Optionally, at least two protection bodies are at different distances from the root of the valve plate.

[0012] Optionally, the number of the protective bodies is three, namely, a first protective body, a second protective body and a third protective body, which are located at a distance from the exhaust hole from far to near; when the protective bodies separate the flange valve seat and the valve plate from each other, the distances between the first protective body, the second protective body and the third protective body and the valve plate are s1, s2 and s3 respectively, where s1 <s2<s3。

[0013] Optionally, the protective body is connected to the flange valve seat by inlaying, bonding or threaded connection.

[0014] Optionally, the protective body is an integral structure or an assembly composed of multiple parts.

[0015] Optionally, the protective body is a cylindrical or right prism structure.

[0016] A compressor is a rotor compressor, and the compressor includes any one of the above-mentioned compressor protection devices.

[0017] An air conditioner comprises the above-mentioned compressor.

[0018] Any of the above technical solutions can at least produce the following technical effects:

[0019] The present invention assembles a protective body between the flange valve seat and the valve plate. When the temperature inside the compressor is high, the protective body produces elastic deformation under the action of temperature, pressure, etc., which can push open the valve plate and move the valve plate upward to a height corresponding to the deformation of the protective body, so that the exhaust hole of the compressor is connected to the outside world, thereby allowing the compressor to discharge high-temperature gas, reducing the exhaust pressure inside the compressor, thereby reducing the exhaust temperature and operating load of the compressor, avoiding abnormal phenomena such as burning of the motor and wear of the pump body, and increasing the service life of the compressor; and the protective device has a simple structure and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the top view of the valve disc and flange valve seat when it is a protective body;

[0022] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of a protective body in the AA direction before deformation;

[0023] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of a protective body in the AA direction when the protective body is deformed;

[0024] Figure 4 It is a schematic diagram of the functional relationship between the temperature and deformation of the protection body;

[0025] Figure 5 It is a schematic diagram of the top view of the valve disc and flange valve seat when there are three protective bodies;

[0026] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the three protective bodies before deformation along the AA direction;

[0027] Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure of the three protective bodies when they are deformed in the AA direction.

[0028] In the figure, 1 is the flange valve seat; 11 is the exhaust hole; 2 is the valve plate; 3 is the valve plate baffle; 4 is the rivet; 5 is the protective body; 51 is the first protective body; 52 is the second protective body; 53 is the third protective body. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0030] The present invention provides a compressor protection device, such as Figure 1-3 As shown, it includes a flange valve seat 1, a valve disc 2 and a protective body 5. The protective body 5 is connected to the flange valve seat 1 and assembled between the flange valve seat 1 and the valve disc 2. An exhaust hole 11 is provided on the flange valve seat 1. The valve disc 2 fits the upper surface of the flange valve seat 1 and covers the exhaust hole 11. The valve disc baffle 3 is located above the valve disc 2. The valve disc 2 and the valve disc baffle 3 are riveted to the flange valve seat 1 by rivets 4 to control the exhaust of the compressor. The protective body 5 can produce elastic deformation to separate the flange valve seat 1 and the valve disc 2 from each other, so that the exhaust hole 11 of the compressor is connected to the outside world, the gas in the compressor is discharged, and the exhaust pressure of the compressor is reduced. As shown Figure 2 As shown, before the protective body 5 produces elastic deformation, the protective body 5 is between the flange valve seat 1 and the valve plate 2. Figure 3As shown, when the temperature inside the compressor rises, the protective body 5 undergoes elastic deformation under the influence of temperature, pressure, etc., and the height of the protective body 5 increases, which can push open the valve plate 2 and move the valve plate 2 upward by a height corresponding to the deformation of the protective body 5. When the exhaust protection temperature is reached, generally around 130 degrees, the valve plate 2 will open to a certain angle under the action of the rivet 4 and cannot completely cover the exhaust hole 11. A gap exists between the valve plate 2 and the flange valve seat 1. The high-temperature gas in the compressor is discharged through the exhaust hole 11 and this gap, reducing the exhaust pressure inside the compressor, thereby reducing the compressor exhaust temperature and operating load. Therefore, by assembling the protective body 5 between the flange valve seat 1 and the valve plate 2, the exhaust temperature of the compressor is reduced, the abnormal phenomenon of motor burning and pump body wear is avoided, and the service life of the compressor is increased. In addition, the protective device has a simple structure and high reliability.

[0031] As an optional embodiment, the thermal expansion coefficient of the protective body 5 is greater than the thermal expansion coefficient of the flange valve seat 1 and the valve plate 2. Objects expand and contract due to temperature changes, and their ability to change is expressed by the change in length value caused by unit temperature change under constant pressure, that is, by the thermal expansion coefficient. Elastic deformation produced by thermal expansion is easy to achieve, and can also correspond to changes in the exhaust temperature of the compressor. The thermal expansion coefficient of the protective body 5 is large, and the deformation of the protective body 5 can exceed the deformation of the flange valve seat 1 and the valve plate 2, thereby separating the flange valve seat 1 and the valve plate 2 from each other, and the compressor performs exhaust work. The material of the protective body 5 is zinc or cadmium. The thermal expansion coefficient of zinc or cadmium materials is high and the acquisition cost is low. The performance of the metal will not be affected at the exhaust temperature (generally around 130°C), and it is also easy to quickly restore the shape after the exhaust temperature drops. The thermal expansion coefficient of zinc is 36*10 -6 / ℃, the thermal expansion coefficient of cadmium is 41*10 -6 / ℃, flange valve seat 1 and valve disc 2 are generally made of steel, with a thermal expansion coefficient of 14*10 -6 / ℃, the thermal expansion coefficient of the protective body 5 is higher when zinc or cadmium is used. When the exhaust temperature is high, it is easy to separate the flange valve seat 1 and the valve plate 2 to exhaust the compressor. Of course, the protective body 5 can also be made of other materials with higher thermal expansion coefficients. The material is set with a critical temperature. When the critical temperature is exceeded, the deformation is large, and when it is not exceeded, it is small. Figure 4 As shown, the thermal expansion coefficient of the protective body 5 is small below the compressor's required protection temperature, resulting in minimal deformation. When the compressor's exhaust temperature reaches the protection temperature, the thermal expansion deformation of the protective body 5, t1, equals t. When the exhaust temperature exceeds the protection temperature, the thermal expansion coefficient of the protective body 5 increases dramatically, with deformation t1 exceeding t. For example, for a household air conditioner compressor, a protection temperature of 125-135°C is ideal, but this range is not limited to this and can be determined based on the compressor's operating environment.

[0032] As an optional implementation, as Figure 1 , Figure 5 shown, the number of the protection bodies 5 is multiple. The multiple protection bodies 5 can slow down the separation speed between the flange valve seat 1 and the valve plate 2, which not only reduces the exhaust pressure of the compressor, eases the operating conditions of the compressor, but also ensures to a certain extent that the compressor can continuously work.

[0033] As an optional implementation, as Figure 6 shown, the distances between at least two protection bodies 5 and the root of the valve plate 2 are different. The root of the valve plate 2 is the connection part between the valve plate 2 and the rivet 4. The protection body 5 closest to the root of the valve plate 2 pushes open the valve plate 2 earliest. For example, the multiple protection bodies 5 are distributed along the length direction of the valve plate 2. The valve plate 2 is a strip-shaped body. The distribution of the multiple protection bodies 5 along the length direction of the valve plate 2 increases the contact area between the protection bodies 5 and the valve plate 2 before deformation. The protection body 5 closer to the exhaust hole 11 separates from the valve plate 2 earlier, better realizing the effect of gradually separating the flange valve seat 1 and the valve plate 2. Preferably, the multiple protection bodies 5 are evenly distributed along the length direction of the valve plate 2. The uniform distribution of the multiple protection bodies 5 can further improve the effect of gradually separating the flange valve seat 1 and the valve plate 2. Of course, at least two protection bodies 5 can also be distributed obliquely along the valve plate 2 or stagger a certain angle from each other, which can also make the protection body 5 closest to the root of the valve plate 2 push open the valve plate 2 earliest, realizing the slow separation of the valve plate 2 and the flange valve seat 1. The corresponding arrangement mode of the valve plate 2 can be selected according to the size of the protection body 5, processing convenience, etc.

[0034] As an optional implementation, when the multiple protection bodies 5 generate elastic deformation to separate the flange valve seat 1 and the valve plate 2 from each other, the farther the distance between the protection body 5 and the exhaust hole 11 is, the closer the distance between the protection body 5 and the valve plate 2 is, that is, the protection body 5 closer to the exhaust hole 11 separates from the valve plate 2 earlier. As Figure 5-7 shown, the number of the protection bodies 5 is three, which are the first protection body 51, the second protection body 52 and the third protection body 53 with the distances from the exhaust hole 11 from far to near respectively. The number of the three protection bodies 5 is appropriate, which can balance the manufacturing cost and slow down the separation speed between the flange valve seat 1 and the valve plate 2. The first protection body 51, the second protection body 52 and the third protection body 53 separate from the valve plate 2 successively. When the protection body 5 separates the flange valve seat 1 and the valve plate 2 from each other, the distances between the first protection body 51, the second protection body 52, the third protection body 53 and the valve plate 2 are s1, s2 and s3 respectively, where s1 < s2 < s3, thus realizing the gradual separation of the flange valve seat 1 and the valve plate 2. Of course, the number of the protection bodies 5 can also be set in other ways according to needs, such as 2, 4, 5, etc.

[0035] As an optional implementation, the protective body 5 is connected to the flange valve seat 1 by inlaying, bonding or threaded connection. Different connection methods facilitate the connection of the protective body 5 and the flange valve seat 1 through different matching structures, which is convenient for selection according to the use environment and improves the scope of application.

[0036] As an alternative embodiment, the protective body 5 is a one-piece structure or an assembly composed of multiple parts. When the protective body 5 is a one-piece structure, it is easier to manufacture. The protective body 5 is preferably a cylindrical structure, such as a cylindrical or right prism structure. A groove is provided at a corresponding position on the flange valve seat 1, so that the groove mates with the bottom surface of the cylindrical structure. The depth of the groove is less than the height of the cylindrical structure, thereby allowing the protective body 5 to be connected to the flange valve seat 1 by inlay or bonding. When the protective body 5 and the flange valve seat 1 are connected by inlay, the width of the groove can be slightly less than the width of the bottom surface of the cylindrical structure, so that the two achieve an interference fit, which can improve the fixing effect of the protective body 5. Of course, the protective body 5 can also have other geometric structures, such as a cone, a rotating body, a cross-section, etc., so long as they can be assembled between the flange valve seat 1 and the valve disc 2. These are not listed in detail here. When the protective body 5 is an assembly composed of multiple parts, it consists of a protective body and auxiliary parts with a lower thermal expansion coefficient. The protective body can also be a cylindrical or right prism structure. The auxiliary parts, such as screws, achieve a threaded connection between the protective body 5 and the flange valve seat 1.

[0037] A compressor is a rotary compressor, which can be single-cylinder, double-cylinder or multi-cylinder. The rotary compressor includes the compressor protection device provided by the present invention. The compressor protection device can effectively reduce the compressor operating load, reduce the compressor exhaust temperature, prevent motor burning and pump body wear, and thus achieve an increase in the service life of the compressor.

[0038] An air conditioner includes the compressor provided by the present invention. The compressor is an important component in the air conditioner. After the service life of the compressor is extended by the compressor protection device, the service life of the air conditioner is also extended.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A compressor protection device, characterized in that: It includes a flange valve seat, a valve plate and a protective body; the protective body is assembled between the flange valve seat and the valve plate; the protective body can produce elastic deformation to separate the flange valve seat and the valve plate from each other, so that the exhaust hole of the compressor is connected to the outside world; The thermal expansion coefficient of the protection body is greater than the thermal expansion coefficients of the flange valve seat and the valve plate.

2. The compressor protection device according to claim 1, characterized in that: The material of the protective body is zinc or cadmium.

3. The compressor protection device according to claim 1, characterized in that: There are multiple protective bodies.

4. The compressor protection device according to claim 3, characterized in that: At least two protection bodies are at different distances from the root of the valve plate.

5. The compressor protection device according to claim 3, characterized in that: There are three protective bodies, namely the first protective body, the second protective body and the third protective body, which are located at a distance from the exhaust hole from far to near. When the protective bodies separate the flange valve seat and the valve plate from each other, the distances between the first protective body, the second protective body and the third protective body and the valve plate are s1, s2 and s3 respectively, where s1 <s2<s3。 6. The compressor protection device according to claim 1, characterized in that: The protection body is connected to the flange valve seat by means of inlaying, bonding or threaded connection.

7. The compressor protection device according to claim 1, characterized in that: The protective body is an integral structure or an assembly composed of multiple parts.

8. The compressor protection device according to claim 1, characterized in that: The protection body is a cylindrical or right prism structure.

9. A compressor, characterized in that: The compressor is a rotor compressor, and the compressor includes the compressor protection device according to any one of claims 1-8.

10. An air conditioner, characterized in that: The air conditioner includes the compressor described in claim 9.

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