Capacity adjusting device of screw heat pump compressor
By introducing a capacity regulation fixing mechanism and an oil inlet connection mechanism into the screw heat pump compressor, the problem of damage caused by the movement of the capacity regulation slide valve after the failure of the solenoid valve group is solved, the stability of capacity regulation and the reliability of the capillary tube are realized, and the maintenance convenience and safety of the device are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-04-07
AI Technical Summary
In existing screw heat pump compressors, the capacity regulating device can cause the regulating slide valve to move after the solenoid valve group fails, leading to impact with internal compressor components, resulting in damage and malfunction, and affecting subsequent maintenance.
A screw heat pump compressor device including a capacity regulating fixing mechanism and an oil inlet connection mechanism was designed. The capacity regulating valve is fixed by a cylinder pushing a slider and a friction clamp to prevent it from moving. The capillary tube is disassembled and fixed by a threaded sleeve and an elastic pressure column to avoid leakage.
It effectively prevents the capacity regulating slide valve from moving after the solenoid valve assembly fails, avoids impact damage to compressor components, simplifies the maintenance process, prevents capillary tube leakage, and improves the stability and reliability of the device.
Smart Images
Figure CN224094651U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screw heat pump compressor technology, specifically to a capacity regulating device for a screw heat pump compressor. Background Technology
[0002] Currently, in screw heat pump compressors and process screw compressors, a slide valve structure is widely used for capacity regulation. This regulation method involves installing a regulating slide valve on the screw compressor body. The regulating slide valve is located at the intersection of the two inner circles on the high-pressure side of the body and becomes part of the compressor body. The capacity is adjusted by moving it back and forth in a direction parallel to the rotor axis.
[0003] In existing technologies, the capacity regulation device of a screw heat pump compressor mainly consists of a capacity regulating slide valve, a solenoid valve assembly (normally closed or normally open), an oil piston, an oil reservoir, an oil filter, and a capillary tube. These components work together to achieve precise regulation of the compressor capacity. However, in actual use, when the solenoid valve assembly fails, it cannot fix the regulated capacity regulating slide valve in the designated position, making it easy for the regulated slide valve to move. This causes the capacity regulating slide valve to collide with other components inside the compressor. Such collisions can not only damage the capacity regulating slide valve and compressor components but may also lead to more serious malfunctions, making subsequent maintenance difficult. Therefore, it is necessary to improve the capacity regulation device of a screw heat pump compressor. Utility Model Content
[0004] The purpose of this invention is to provide a capacity regulating device for a screw heat pump compressor to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a capacity adjustment device for a screw heat pump compressor, comprising a screw heat pump compressor, an electromagnetic valve group provided on the front of the screw heat pump compressor, an oil storage tank fixedly connected to the bottom of the screw heat pump compressor, an oil inlet connection mechanism provided between the oil storage tank and the electromagnetic valve group, and a capacity adjustment fixing mechanism provided inside the screw heat pump compressor;
[0006] The capacity adjustment and fixing mechanism includes a fixing component and a capacity adjustment component, wherein the capacity adjustment component is disposed inside the screw heat pump compressor;
[0007] The fixing component includes a cylinder, which is fixedly connected to the front of the screw heat pump compressor. A push frame is fixedly connected to the output end of the cylinder. A slider one is slidably connected to the inner side of the push frame. An adjustment frame is rotatably connected to the right side of the slider one. A slider two is rotatably connected to the left side of the adjustment frame. A friction clamp is slidably connected to the outside of the slider two. A slide rail is fixedly connected inside the screw heat pump compressor to facilitate fixing the adjusted capacity regulating slide valve.
[0008] Preferably, a groove is provided at the position corresponding to the slide rail and the friction clamp, and the friction clamp is slidably connected in the groove, and the adjusting frame is rotatably connected inside the screw heat pump compressor, so as to facilitate the relative movement of the friction clamps on both sides.
[0009] Preferably, a groove is provided at the position corresponding to the friction clamp and the second slider, and the second slider is slidably connected in the groove, which facilitates restricting the movement of the second slider.
[0010] Preferably, the capacity adjustment assembly includes a piston cylinder, which is fixedly connected inside the screw heat pump compressor. A piston is slidably connected to the inside of the piston cylinder. A connecting rod is fixedly connected to the right side of the piston. A friction column is fixedly connected to the right side of the connecting rod. A capacity adjustment valve is fixedly connected to the right side of the friction column to facilitate adjustment of the required capacity.
[0011] Preferably, the capacity regulating valve is slidably connected inside the screw heat pump compressor, and a hole is provided at the corresponding position of the piston cylinder and the connecting rod, and the connecting rod is slidably connected in the hole, which facilitates the movement of the capacity regulating valve.
[0012] Preferably, the oil inlet connection mechanism includes an oil outlet pipe 1, which is fixedly connected to the front of the oil storage tank. An oil outlet pipe 2 is fixedly connected to the front of the solenoid valve assembly. Threaded sleeves are fixedly connected to the top of the oil outlet pipe 1 and the right side of the oil outlet pipe 2. A threaded sleeve is threadedly connected to the outside of the threaded sleeve, and a pressure sleeve is fixedly connected to the outside of the threaded sleeve. An elastic pressure column is fixedly connected to one end of the threaded sleeve away from the oil outlet pipe 2 and the other end of the threaded sleeve away from the oil outlet pipe 2. A connecting pipe is fixedly connected to one end of the threaded sleeve away from the oil outlet pipe 2 and the other end of the connecting pipe. Capillary tubes are sleeved at both ends of the connecting pipe to facilitate capillary tube replacement and prevent oil leakage.
[0013] Preferably, the inner side of the elastic pressure column abuts against the outer side of the capillary tube, and the outer side of the elastic pressure column abuts against the inner side of the pressure sleeve, which facilitates fixing both ends of the capillary tube.
[0014] Compared with the prior art, this utility model provides a capacity regulating device for a screw heat pump compressor, which has the following beneficial effects:
[0015] 1. The capacity adjustment device of this screw heat pump compressor, after adjustment, activates the cylinder through the set capacity adjustment fixing mechanism, thereby pushing the slider two to synchronously drive the friction clamps to move, so that the friction clamps on both sides gradually approach the friction column until they abut against it, thereby fixing the connected capacity adjustment slide valve. This prevents the adjusted capacity adjustment slide valve from moving when its solenoid valve group fails, thus preventing the capacity adjustment slide valve from hitting other internal components of the compressor and causing greater damage, and further preventing more serious failures, which is conducive to later maintenance.
[0016] 2. The capacity regulating device of the screw heat pump compressor, through the oil inlet connection mechanism, uses a tool to rotate the threaded sleeve, causing the threaded sleeve to gradually move away from the elastic pressure column. When the elastic pressure column returns to its original position, the contact between the elastic pressure column and the capillary tube is released, thereby pulling the capillary tube outward and separating it from the connecting pipe, thus completing the disassembly and separation of the capillary tube. At the same time, during the reset, the above operation is reversed, so that the elastic pressure column re-contacts the new capillary tube, thereby completing the fixation of the capillary tube and preventing leakage. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the external structure of the capacity adjustment and fixing mechanism of this utility model;
[0020] Figure 3 This is a schematic diagram of the unfolded structure of the fixing component of this utility model;
[0021] Figure 4 This is a schematic diagram of the unfolded structure of the capacity adjustment component of this utility model;
[0022] Figure 5 This is a schematic diagram of the unfolded structure of the oil inlet connection mechanism of this utility model.
[0023] In the diagram: 1. Screw heat pump compressor; 2. Solenoid valve assembly; 5. Oil inlet connection mechanism; 4. Capacity adjustment fixing mechanism; 3. Oil reservoir; 41. Fixing component; 42. Capacity adjustment component; 411. Cylinder; 412. Push frame; 413. Slider one; 414. Adjusting frame; 415. Slide rail; 416. Slider two; 417. Friction clamp; 421. Piston cylinder; 422. Piston one; 423. Connecting rod; 424. Friction column; 425. Capacity adjustment slide valve; 51. Oil outlet pipe one; 52. Threaded sleeve; 53. Threaded sleeve; 54. Pressure sleeve; 55. Connecting pipe; 56. Elastic pressure column; 57. Capillary tube; 58. Oil outlet pipe two. Detailed Implementation
[0024] 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.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example
[0026] Based on current technology, when the solenoid valve assembly fails, it cannot fix the adjusted capacity regulating valve in the designated position, making it prone to movement. This can cause the capacity regulating valve to collide with other internal compressor components. Such collisions can damage both the capacity regulating valve and compressor parts, potentially leading to more serious malfunctions and hindering subsequent maintenance. Please refer to [link to relevant documentation]. Figure 1-5 This utility model provides a technical solution: a capacity adjustment device for a screw heat pump compressor, including a screw heat pump compressor 1, an electromagnetic valve group 2 is provided on the front of the screw heat pump compressor 1, an oil storage tank 3 is fixedly connected to the bottom of the screw heat pump compressor 1, an oil inlet connection mechanism 5 is provided between the oil storage tank 3 and the electromagnetic valve group 2, and a capacity adjustment fixing mechanism 4 is provided inside the screw heat pump compressor 1.
[0027] The capacity adjustment and fixing mechanism 4 includes a fixing component 41 and a capacity adjustment component 42, with the capacity adjustment component 42 disposed inside the screw heat pump compressor 1;
[0028] The fixed assembly 41 includes a cylinder 411, which is fixedly connected to the front of the screw heat pump compressor 1. A push frame 412 is fixedly connected to the output end of the cylinder 411. A slider 413 is slidably connected to the inner side of the push frame 412. An adjusting frame 414 is rotatably connected to the right side of the slider 413. A slider 416 is rotatably connected to the left side of the adjusting frame 414. A friction clamp 417 is slidably connected to the outside of the slider 416. A slide rail 415 is fixedly connected inside the screw heat pump compressor 1 to facilitate the fixing of the adjusted capacity regulating slide valve 425.
[0029] Furthermore, grooves are provided at the corresponding positions of the slide rail 415 and the friction clamp 417, and the friction clamp 417 is slidably connected in the groove. The adjusting frame 414 is rotatably connected inside the screw heat pump compressor 1, which facilitates the relative movement of the friction clamps 417 on both sides.
[0030] Furthermore, a groove is provided at the corresponding position of the friction clamp 417 and the slider 416, and the slider 416 is slidably connected in the groove, which facilitates restricting the movement of the slider 416.
[0031] Furthermore, the capacity adjustment assembly 42 includes a piston cylinder 421, which is fixedly connected inside the screw heat pump compressor 1. A piston 422 is slidably connected to the inside of the piston cylinder 421. A connecting rod 423 is fixedly connected to the right side of the piston 422. A friction column 424 is fixedly connected to the right side of the connecting rod 423. A capacity adjustment valve 425 is fixedly connected to the right side of the friction column 424 to facilitate the adjustment of the required capacity.
[0032] Furthermore, the capacity regulating valve 425 is slidably connected inside the screw heat pump compressor 1, and a hole is opened at the corresponding position of the piston cylinder 421 and the connecting rod 423, and the connecting rod 423 is slidably connected in the hole, which facilitates pushing the capacity regulating valve 425 to move. Example
[0033] Given the current technological limitations that require fixing the capillary tube 57 to prevent leakage, please refer to [link / reference needed]. Figure 5 Furthermore, in conjunction with Embodiment 1, the oil inlet connection mechanism 5 includes an oil outlet pipe 1 51, which is fixedly connected to the front of the oil storage tank 3. An oil outlet pipe 2 58 is fixedly connected to the front of the solenoid valve assembly 2. Threaded sleeves 52 are fixedly connected to the top of the oil outlet pipe 1 51 and the right side of the oil outlet pipe 2 58. A threaded sleeve 53 is threadedly connected to the outside of the threaded sleeve 52. A pressure sleeve 54 is fixedly connected to the outside of the threaded sleeve 53. An elastic pressure column 56 is fixedly connected to one end of the threaded sleeve 52 away from the oil outlet pipe 2 58. A connecting pipe 55 is fixedly connected to one end of the threaded sleeve 52 away from the oil outlet pipe 2 58. Capillary tubes 57 are sleeved at both ends of the connecting pipe 55 to facilitate replacement of the capillary tubes 57 and prevent oil leakage.
[0034] Furthermore, the inner side of the elastic pressure column 56 abuts against the outer side of the capillary tube 57, and the outer side of the elastic pressure column 56 abuts against the inner side of the pressure sleeve 54, which facilitates fixing both ends of the capillary tube 57.
[0035] In actual operation, when the device is in use, firstly, to ensure smooth startup when the compressor starts, the action of the solenoid valve group 2 is usually adjusted to allow the oil to bypass directly back to the low-pressure chamber. At this time, the bypass space of the capacity regulating slide valve 425 reaches its maximum. As the startup program is executed or the set temperature switch is activated, the solenoid valve group 2 will be energized and turned on in sequence, and the positions of the capacity regulating piston and the capacity regulating slide valve 425 will change accordingly. During adjustment, lubricating oil is transported from the oil reservoir 3 in the compressor housing by pressure difference, and after being limited by the capillary tube 57, it is injected into the piston cylinder 421 through the solenoid valve group 2 for adjustment, thereby pushing the piston 422 to move, which in turn pushes the connecting rod 423 to move. At the same time, the friction column 424 moves, which pushes the capacity regulating slide valve 425 to slide inside the screw heat pump compressor 1, thereby realizing the adjustment of cooling or heating capacity under different load conditions. After adjustment, the cylinder 411 is activated by the set capacity adjustment fixing mechanism 4, and the cylinder 411 pushes the push frame 412 to move. The push frame 412 then pushes slider 413 to move, causing slider 413 to synchronously push adjusting frame 414 to rotate around the connection point of screw heat pump compressor 1. This, in turn, pushes slider 416 to synchronously drive friction clamp 417 to move, causing the friction clamps 417 on both sides to gradually approach friction column 424 until they abut against it. This completes the fixation of the connected capacity regulating slide valve 425, preventing the adjusted capacity regulating slide valve 425 from moving if the solenoid valve group 2 fails. This also prevents the replacement of the bearing... When the capillary tube 57 is in place, the threaded sleeve 53 is rotated by the oil inlet connection mechanism 5 and a tool is used to rotate the threaded sleeve 53, so that the threaded sleeve 53 drives the pressure sleeve 54 to gradually move away from the elastic pressure column 56. When the elastic pressure column 56 is reset outward, the contact between the elastic pressure column 56 and the capillary tube 57 is released, thereby pulling the capillary tube 57 outward and separating it from the connecting tube 55, thus completing the disassembly and separation of the capillary tube 57. At the same time, during the reset, the above operation is reversed so that the elastic pressure column 56 is re-contacted with the new capillary tube 57.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A capacity regulating device for a screw heat pump compressor, comprising a screw heat pump compressor (1), characterized in that: The screw heat pump compressor (1) is provided with a solenoid valve group (2) on the front, and an oil storage tank (3) is fixedly connected to the bottom of the screw heat pump compressor (1). An oil inlet connection mechanism (5) is provided between the oil storage tank (3) and the solenoid valve group (2). A capacity adjustment and fixing mechanism (4) is provided inside the screw heat pump compressor (1). The capacity adjustment fixing mechanism (4) includes a fixing component (41) and a capacity adjustment component (42), the capacity adjustment component (42) being disposed inside the screw heat pump compressor (1); The fixed assembly (41) includes a cylinder (411), which is fixedly connected to the front of the screw heat pump compressor (1). A push frame (412) is fixedly connected to the output end of the cylinder (411). A slider one (413) is slidably connected to the inner side of the push frame (412). An adjustment frame (414) is rotatably connected to the right side of the slider one (413). A slider two (416) is rotatably connected to the left side of the adjustment frame (414). A friction clamp (417) is slidably connected to the outside of the slider two (416). A slide rail (415) is fixedly connected inside the screw heat pump compressor (1).
2. The capacity regulating device for a screw heat pump compressor according to claim 1, characterized in that: The slide rail (415) has a groove at the corresponding position of the friction clamp (417), and the friction clamp (417) is slidably connected in the groove, and the adjusting frame (414) is rotatably connected inside the screw heat pump compressor (1).
3. The capacity regulating device for a screw heat pump compressor according to claim 1, characterized in that: The friction clamp (417) and the slider two (416) are provided with grooves at corresponding positions, and the slider two (416) is slidably connected in the groove.
4. The capacity regulating device for a screw heat pump compressor according to claim 1, characterized in that: The capacity adjustment assembly (42) includes a piston cylinder (421), which is fixedly connected inside the screw heat pump compressor (1). A piston (422) is slidably connected to the inside of the piston cylinder (421). A connecting rod (423) is fixedly connected to the right side of the piston (422). A friction column (424) is fixedly connected to the right side of the connecting rod (423). A capacity adjustment valve (425) is fixedly connected to the right side of the friction column (424).
5. The capacity regulating device for a screw heat pump compressor according to claim 4, characterized in that: The capacity regulating valve (425) is slidably connected inside the screw heat pump compressor (1), and the piston cylinder (421) and the connecting rod (423) are provided with holes at corresponding positions, and the connecting rod (423) is slidably connected in the holes.
6. The capacity regulating device for a screw heat pump compressor according to claim 1, characterized in that: The oil inlet connection mechanism (5) includes an oil outlet pipe 1 (51), which is fixedly connected to the front of the oil storage tank (3). An oil outlet pipe 2 (58) is fixedly connected to the front of the solenoid valve group (2). Threaded sleeves (52) are fixedly connected to the top of the oil outlet pipe 1 (51) and the right side of the oil outlet pipe 2 (58). A threaded sleeve (53) is threaded to the outside of the threaded sleeve (52). A pressure sleeve (54) is fixedly connected to the outside of the threaded sleeve (53). An elastic pressure column (56) is fixedly connected to one end of the threaded sleeve (52) away from the oil outlet pipe 2 (58) and the oil outlet pipe 2 (58). A connecting pipe (55) is fixedly connected to one end of the threaded sleeve (52) away from the oil outlet pipe 2 (58) and the oil outlet pipe 2 (58). A capillary tube (57) is sleeved at both ends of the connecting pipe (55).
7. The capacity regulating device for a screw heat pump compressor according to claim 6, characterized in that: The inner side of the elastic pressure column (56) abuts against the outer side of the capillary tube (57), and the outer side of the elastic pressure column (56) abuts against the inner side of the pressure sleeve (54).