Manual and automatic integrated reset pressure controller for refrigeration equipment

Abstract

The utility model discloses a manual and automatic integrated reset pressure controller for refrigeration equipment, which belongs to the technical field of refrigeration equipment and comprises a large shell, a connecting mechanism is arranged at the inner bottom of the large shell, a contact mechanism is arranged in a switch shell, and a pressing rod mechanism is arranged in the switch shell. The top of the large shell is fixedly connected with a positioning mechanism, and the two wires are located in the positioning mechanism. Through a connecting mechanism formed by combining multiple diaphragms, pressure is accurately captured through the first diaphragm and transmitted through the gasket and the small diaphragm, the pressure is rapidly converted into push rod displacement, pressure fluctuation is sensitively responded, and equipment stability is guaranteed; by means of the contact mechanism, a push rod acts to enable a reed to deform, a contact is driven to be connected and disconnected, automatic circuit control is achieved, signals are accurately transmitted outwards, and response is reliable. The pressing rod mechanism is used for manually pressing the trigger reed to deform under special working conditions, the contact state is flexibly switched, and emergency control is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a manual / automatic reset pressure controller for refrigeration equipment. Background Technology

[0002] During the operation of refrigeration equipment, the manual / automatic reset pressure controller plays a crucial role in achieving precise control and safety assurance of pressure parameters. However, the existing manual / automatic reset pressure controllers for refrigeration equipment have certain technical defects in terms of wiring settings and layout.

[0003] Typically, these controllers have two wires above them. In actual installation and operation, these wires are often scattered and randomly distributed around the controller. On the one hand, due to their weight, the drooping wires lack effective support and restraint under gravity, making them prone to friction, pulling, or even excessive bending with surrounding equipment and structural components. Prolonged exposure to this condition can easily damage the wire insulation, and the internal conductive core may break or experience poor contact, affecting the stable operation of the entire refrigeration equipment's electrical system and even causing short circuits, leakage, and other safety accidents, posing a significant threat to equipment maintenance and safety. On the other hand, the disorderly distribution of these scattered wires around the controller occupies a large operating space. When operators need to manually control the controller, these wires become significant obstacles. During manual resets and parameter adjustments, operators are easily tripped or interfered with by the wires, reducing operational convenience and efficiency. Accidental contact with the wires can also lead to misoperation, affecting the normal operation of the refrigeration equipment and failing to meet the demands of modern refrigeration equipment for efficient, safe, and convenient operation.

[0004] Therefore, there is an urgent need to provide a manual / automatic reset pressure controller for refrigeration equipment to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a manual / automatic reset pressure controller for refrigeration equipment.

[0006] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: a manual / automatic reset pressure controller for refrigeration equipment, comprising a large outer shell, a connecting mechanism at the bottom of the inner part of the large outer shell, a push rod fixedly connected to the top of the connecting mechanism, a switch housing fixedly connected inside the large outer shell, the push rod being slidably connected to the bottom of the switch housing, a contact mechanism inside the switch housing, two wires electrically connected to the top of the contact mechanism, and a pressure rod mechanism inside the switch housing, the bottom of the pressure rod mechanism being in contact with the contact mechanism;

[0007] A positioning mechanism is fixedly connected to the top of the large outer shell, and both of the wires are located inside the positioning mechanism.

[0008] The present invention is further configured such that: the connecting mechanism includes a first diaphragm fixedly connected to the bottom of the inner shell, a gasket fixedly connected to the top of the first diaphragm, a small diaphragm fixedly connected to the top of the gasket, and the top of the small diaphragm fixedly connected to the push rod.

[0009] Through the above technical solution, the connecting mechanism serves a connecting function; the first diaphragm is fixedly connected to the bottom of the large outer shell and can directly sense pressure changes within the refrigeration system; when pressure is applied to the first diaphragm, the first diaphragm deforms, and the gasket fixed to its top acts as a buffer and transmits pressure, allowing the pressure to be evenly transmitted to the smaller diaphragm; the smaller diaphragm further converts the pressure change into displacement, pushing the push rod fixedly connected to its top to move upward; this multi-diaphragm combination connecting mechanism design improves the sensitivity and accuracy of pressure transmission, enabling more precise response to pressure fluctuations within the refrigeration system, ensuring that the controller can make corresponding control actions in a timely and accurate manner according to pressure changes, and effectively guaranteeing the stable operation of the refrigeration equipment.

[0010] The present invention is further configured such that: the contact mechanism includes a spring sheet disposed inside the switch housing; the top of the push rod contacts the center of the spring sheet; a moving contact is fixedly connected to one end of the spring sheet; and a stationary contact corresponding to the moving contact is fixedly connected inside the switch housing; both sides of the switch housing are provided with pins; the tops of the two pins are electrically connected to wires respectively; the two wires are electrically connected to the moving contact and the stationary contact through the two pins; and the tops of the two wires extend out of the top of the large housing.

[0011] Through the above technical solution, the contact mechanism controls the on / off state. When the push rod moves upward due to pressure changes or manual operation, it pushes the center of the spring to bend upward, causing the moving contact fixedly connected to one end of the spring to separate from the stationary contact fixedly connected inside the switch housing, thus breaking the circuit. When the pressure returns to normal or the push rod moves downward manually, the spring returns to its original shape, the moving contact contacts the stationary contact, and the circuit is connected. The pins on both sides of the switch housing are electrically connected to two wires, which are electrically connected to the moving and stationary contacts through the pins, transmitting the on / off state signal of the contact mechanism to the outside. The top ends of the two wires protrude from the top of the large housing, facilitating connection with other electrical components of the refrigeration equipment. This contact mechanism design is simple in structure, responds quickly, and can reliably control the on / off state of the circuit. At the same time, it accurately transmits the control signal through the wires, ensuring that the refrigeration equipment can operate normally according to the controller's instructions.

[0012] The present invention is further configured such that: epoxy is filled between the large outer shell and the switch shell, and both wires are located inside the epoxy.

[0013] The above technical solution involves filling the space between the main casing and the switch casing with epoxy resin, with both wires located within the epoxy. The epoxy filling provides insulation, sealing, and fixation. The insulation prevents electrical faults such as leakage and short circuits between wires and between the wires and the casing, ensuring the safe and stable operation of the electrical system. The sealing prevents external moisture, dust, and other impurities from entering the controller, avoiding corrosion and damage to internal components and extending the controller's lifespan. Simultaneously, the epoxy resin fixes the wires within, maintaining a neat and orderly layout inside the controller, preventing wire damage and operational inconvenience caused by scattered wires, and improving the controller's reliability and maintainability.

[0014] The present invention is further configured such that: the pressure rod mechanism includes a first pressure rod and a second pressure rod slidably connected inside the switch housing; the bottom of the first pressure rod contacts the center of the top of the spring; a spring is elastically connected between the second pressure rod and the first pressure rod; the two ends of the spring press the first pressure rod and the second pressure rod respectively; the top of the second pressure rod extends to the top of the switch housing; a pressure cap is fixedly connected to the top of the large housing; and one end of the second pressure rod extending outside the switch housing is located inside the pressure cap.

[0015] The above technical solution includes a first and second pressure rod slidably connected within the switch housing. The bottom of the first pressure rod contacts the center of the top of the reed. When manual operation is required, pressing down on the second pressure rod compresses the first spring, which in turn pushes the first pressure rod downward. The first pressure rod then acts on the center of the top of the reed, causing the reed to deform and changing the contact state between the moving and stationary contacts, thus achieving manual on / off control of the circuit. After manual operation, the elastic restoring force of the first spring resets both the second and first pressure rods. The top of the second pressure rod extends to the top of the switch housing. A pressure cap fixedly connected to the top of the housing protects and guides the second pressure rod. One end of the second pressure rod extending outside the switch housing is located inside the pressure cap. The operator can easily achieve manual control by pressing the second pressure rod inside the pressure cap. This pressure rod mechanism is simple and easy to use, enabling convenient and quick manual intervention when automatic control malfunctions or special operations are required, thus improving the controller's operational flexibility and emergency handling capabilities.

[0016] The present invention is further configured such that: two limiting plates are fixedly connected to the bottom of the inner shell of the large shell, a fixing ring is fixedly connected between the two limiting plates, the fixing ring is fixedly connected to the switch shell, and a cover plate fixedly connected to the bottom of the switch shell is fixedly connected inside the fixing ring; a copper tube is fixedly connected to the bottom of the large shell.

[0017] Through the above technical solution, the two limiting plates at the bottom of the large outer shell serve to position and limit the position of the switch housing. The fixing ring between the two limiting plates further fixes the switch housing inside the large outer shell, ensuring that the switch housing is firmly installed and will not shake or shift during operation. The cover plate inside the fixing ring is fixed to the bottom of the switch housing, providing a sealing and protection function to prevent external impurities from entering the switch housing. The copper tube at the bottom of the large outer shell is used to connect to the refrigeration equipment system, so that the pressure in the refrigeration equipment system can be accurately transmitted to the inside of the large outer shell and act on the connecting mechanism, thereby realizing the controller's real-time monitoring and control of the refrigeration equipment pressure. This structural design ensures the stable installation and reliable operation of each component inside the controller, improves the overall performance and stability of the controller, and ensures that it can accurately and effectively control the pressure of the refrigeration equipment.

[0018] The present invention is further configured such that: the positioning mechanism includes two first brackets fixedly connected to the top of the large outer shell, each of the two first brackets having a sleeve fixedly connected inside, each of the two sleeves having a fixed block with one end inclined, and each of the two fixed blocks and the two sleeves having a second spring connected between them respectively, the two ends of the second spring being fixedly connected to the fixed block and the sleeve respectively.

[0019] Through the above technical solution, the positioning mechanism is used to position the wire. When it is necessary to limit and tighten the wire, the wire is moved to the open end of the sleeve, so that the wire abuts against the inclined surface of the fixing block. This causes the fixing block to move towards the second spring, squeezing the second spring until the fixing block moves to the back of the fixing block. Under the elastic force of the second spring, the fixing block resets and abuts against the wire, limiting and tightening it to prevent the wire from sagging or scattering, thus protecting the wire.

[0020] The present invention is further configured such that: a pull rod is fixedly connected to the other end of each of the two fixed blocks, a connecting rod is rotatably connected to the other end of each of the two pull rods, a pull plate is rotatably connected to the bottom of each of the two connecting rods, the pull plate is slidably connected to the two first brackets, and a limiting groove is fixedly connected to the side of each of the two first brackets facing the pull plate, and the two ends of the pull plate are respectively located in the two limiting grooves.

[0021] With the above technical solution, when it is necessary to unlock and remove the wire for maintenance and repair, slide the pull plate upward so that the pull plate slides in the limit groove, causing the connecting rod to deflect and tilt outward, causing the pull rod to move outward, causing the fixing block to move outward, squeezing the second spring, so that the wire is separated from the fixing block, and the wire can be removed for other operations, which is convenient, quick, simple and practical.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. This utility model utilizes a multi-diaphragm combination connection mechanism. The first diaphragm accurately captures pressure and transmits it through a gasket and a small diaphragm, quickly converting the pressure into push rod displacement. It responds sensitively to pressure fluctuations and ensures equipment stability. Through the contact mechanism, the push rod action deforms the spring, causing the contacts to open and close, realizing automatic circuit control and accurate signal transmission with reliable response. The pressure rod mechanism allows manual pressing to trigger the spring deformation under special working conditions, flexibly switching the contact state and facilitating convenient emergency operation.

[0024] 2. This utility model uses a positioning mechanism where a fixed block and a spring work together to limit the wire, preventing it from becoming scattered. The pull-plate linkage structure enables quick unlocking of the wire, facilitating maintenance. Epoxy filling provides insulation, sealing, and wire fixation, eliminating electrical hazards, blocking impurities, and ensuring a neat layout. The fixing system, consisting of a limiting plate, a fixing ring, and a cover plate, stabilizes the switch housing, seals against impurities, and, in conjunction with copper tubing, precisely transmits pressure, ensuring the overall performance and stability of the controller and efficiently and accurately controlling pressure. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of the present invention;

[0026] Figure 2 This is a second-view sectional view of the present invention;

[0027] Figure 3 This is a structural sectional view of the connecting mechanism;

[0028] Figure 4 This is a structural sectional view of the pressure bar mechanism;

[0029] Figure 5 This is a third-view sectional view of the present invention;

[0030] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0031] In the diagram: 1. Large outer shell; 2. Connecting mechanism; 201. First diaphragm; 202. Gasket; 203. Small diaphragm; 3. Push rod; 4. Switch housing; 5. Contact mechanism; 501. Spring; 502. Moving contact; 503. Stationary contact; 504. Pin; 505. Epoxy resin; 6. Wire; 7. Pressure rod mechanism; 701. First pressure rod; 702. Second pressure rod; 703. Spring 1; 704. Pressure cap; 705. Limiting plate; 706. Fixing ring; 707. Cover plate; 708. Copper tube; 8. Positioning mechanism; 801. First bracket; 802. Sleeve; 803. Fixing block; 804. Spring 2; 805. Pull rod; 806. Connecting rod; 807. Pull plate; 808. Limiting groove. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0033] Please see Figures 1-6 The refrigeration equipment in this embodiment has a manual / automatic reset pressure controller, including a large outer shell 1. A connecting mechanism 2 is located at the bottom inner side of the large outer shell 1. The connecting mechanism 2 includes a first diaphragm 201 fixedly connected to the bottom inner side of the large outer shell 1. A gasket 202 is fixedly connected to the top of the first diaphragm 201, and a small diaphragm 203 is fixedly connected to the top of the gasket 202. The top of the small diaphragm 203 is fixedly connected to a push rod 3. The connecting mechanism 2 serves a connecting function. The first diaphragm 201, fixedly connected to the bottom inner side of the large outer shell 1, can directly sense pressure changes within the refrigeration equipment system. When pressure is applied to the first diaphragm 201... When the first diaphragm 201 deforms, the gasket 202 fixed on its top acts as a buffer and transmits pressure, so that the pressure is evenly transmitted to the small diaphragm 203. The small diaphragm 203 further converts the pressure change into displacement, pushing the push rod 3 fixedly connected to its top to move upward. This multi-diaphragm combination connection mechanism 2 design improves the sensitivity and accuracy of pressure transmission, can respond more accurately to pressure fluctuations in the refrigeration equipment system, and ensures that the controller can make corresponding control actions in a timely and accurate manner according to pressure changes, effectively ensuring the stable operation of the refrigeration equipment.

[0034] like Figures 1-4As shown, a push rod 3 is fixedly connected to the top of the connecting mechanism 2, and a switch housing 4 is fixedly connected inside the large housing 1. The push rod 3 is slidably connected to the bottom of the switch housing 4. A contact mechanism 5 is provided inside the switch housing 4. The contact mechanism 5 includes a spring 501 located inside the switch housing 4. The top of the push rod 3 contacts the center of the spring 501. A moving contact 502 is fixedly connected to one end of the spring 501. A stationary contact 503 corresponding to the moving contact 502 is fixedly connected inside the switch housing 4. Both sides of the switch housing 4 are provided with pins 504. The tops of the two pins 504 are electrically connected to wires 6, respectively. The two wires 6 are electrically connected to the moving contact 502 and the stationary contact 503 through the two pins 504. The tops of the two wires 6 protrude from the top of the large housing 1. The function of the contact mechanism 5 is to control the on / off state. When the push rod 3 moves upward due to pressure changes or manual operation, it will push the center of the spring 501 upward. The bending deformation causes the moving contact 502, which is fixedly connected to one end of the reed 501, to separate from the stationary contact 503, which is fixedly connected inside the switch housing 4, thereby breaking the circuit. When the pressure returns to normal or the push rod 3 is moved downward by manual operation, the reed 501 returns to its original shape, the moving contact 502 contacts the stationary contact 503, and the circuit is connected. The pins 504 on both sides of the switch housing 4 are electrically connected to two wires 6 respectively. The wires 6 are electrically connected to the moving contact 502 and the stationary contact 503 through the pins 504, and transmit the on / off status signal of the contact mechanism 5 to the outside. The top ends of the two wires 6 extend out of the top of the large housing 1, which facilitates connection with other electrical components of the refrigeration equipment. This contact mechanism 5 has a simple structure, responds quickly, and can reliably realize the on / off control of the circuit. At the same time, the control signal is accurately transmitted through the wires 6 to ensure that the refrigeration equipment can operate normally according to the controller's instructions.

[0035] like Figures 1-4As shown, the top of the contact mechanism 5 is electrically connected to two wires 6. A lever mechanism 7 is provided inside the switch housing 4. The lever mechanism 7 includes a first lever 701 and a second lever 702 slidably connected inside the switch housing 4. The bottom of the first lever 701 contacts the center of the top of the spring 501. A spring 703 elastically connects the second lever 702 and the first lever 701. The two ends of the spring 703 respectively press the first lever 701 and the second lever 702. The top of the second lever 702 extends to the top of the switch housing 4. A pressure cap 704 is fixedly connected to the top of the large housing 1. One end of the second lever 702 extending outside the switch housing 4 is located inside the pressure cap 704. The lever mechanism 7 includes a first lever 701 and a second lever 702 slidably connected inside the switch housing 4. The bottom of the first lever 701 contacts the center of the top of the spring 501. When manual operation is required, the second lever 702 is pressed down. Because a spring elastically connects the second lever 702 and the first lever 701... When spring 703 is compressed, the second pressure rod 702 pushes the first pressure rod 701 downward. The first pressure rod 701 then acts on the center of the top of the reed 501, causing the reed 501 to deform and change the contact state between the moving contact 502 and the stationary contact 503, thus realizing manual on / off control of the circuit. When the manual operation ends, the elastic restoring force of spring 703 will reset the second pressure rod 702 and the first pressure rod 701. The top of the second pressure rod 702 extends to the top of the switch housing 4. The pressure cap 704 fixedly connected to the top of the large housing 1 protects and guides the second pressure rod 702. One end of the second pressure rod 702 extending outside the switch housing 4 is located inside the pressure cap 704. The operator can easily achieve manual control by pressing the second pressure rod 702 inside the pressure cap 704. This pressure rod mechanism 7 is simple and easy to use. It can facilitate and quickly perform manual intervention when the automatic control fails or special operation is required, improving the operational flexibility and emergency handling capability of the controller.

[0036] like Figures 1-6As shown, the bottom of the pressure rod mechanism 7 contacts the contact mechanism 5, and a positioning mechanism 8 is fixedly connected to the top of the large outer shell 1. Both wires 6 are located inside the positioning mechanism 8. The positioning mechanism 8 includes two first brackets 801 fixedly connected to the top of the large outer shell 1. Each of the two first brackets 801 has a sleeve 802 fixedly connected inside it. Each of the two sleeves 802 has a fixed block 803 with one end inclined. A second spring 804 is connected between the two fixed blocks 803 and the two sleeves 802 respectively. The two ends of the second spring 804 are fixedly connected to the fixed block 803 and the sleeve 802 respectively. The function of the positioning mechanism 8 is to position the wires 6. When it is desired to limit and tighten the wires 6, the wires 6 are aligned with the open end of the sleeve 802 and moved, so that the wires 6 abut against the inclined surface of the fixed block 803, causing the fixed block 803 to move towards the second spring 804, squeezing the second spring 804, until the fixed block 803 moves to the back of the fixed block 803 and is fixed under the elastic force of the second spring 804. Block 803 resets and abuts against the wire 6, limiting and constricting it to prevent it from sagging or becoming tangled, thus protecting it. The other ends of both blocks 803 are fixedly connected to pull rods 805, and the other ends of both pull rods 805 are rotatably connected to connecting rods 806. The bottoms of both connecting rods 806 are rotatably connected to pull plates 807. Pull plates 807 are slidably connected to two first supports 801. The two first supports 801 are fixedly connected to limit grooves 808 on the side facing the pull plate 807. Both ends of the pull plate 807 are located within the two limit grooves 808. When it is necessary to unlock and remove the wire 6 for maintenance and repair, the pull plate 807 is slid upwards, causing it to slide within the limit grooves 808. This causes the connecting rod 806 to deflect outwards, moving the pull rod 805 outwards, which in turn moves the blocks 803 outwards, compressing the spring 804 and causing the wire 6 to detach from the blocks 803. The wire 6 can then be removed for other operations, making the process convenient, quick, simple, and practical.

[0037] like Figures 1-4 As shown, epoxy 505 fills the space between the large outer casing 1 and the switch casing 4, with both wires 6 located within it. The epoxy 505 filling serves to insulate, seal, and fix the wires. Its insulation prevents electrical faults such as leakage and short circuits between the wires 6 and between the wires 6 and the casing, ensuring the safe and stable operation of the electrical system. Its sealing function prevents external moisture, dust, and other impurities from entering the controller, avoiding corrosion and damage to internal components and extending the controller's lifespan. Simultaneously, the epoxy 505 fixes the wires 6 within it, maintaining a neat and orderly layout inside the controller, preventing damage and operational inconvenience caused by scattered wires, and improving the controller's reliability and maintainability.

[0038] like Figures 1-4 As shown, two limiting plates 705 are fixedly connected to the bottom of the inner shell 1, and a fixing ring 706 is fixedly connected between the two limiting plates 705. The fixing ring 706 is fixedly connected to the switch shell 4, and a cover plate 707 fixedly connected to the bottom of the switch shell 4 is fixedly connected inside the fixing ring 706. A copper tube 708 is fixedly connected to the bottom of the inner shell 1. The two limiting plates 705 at the bottom of the inner shell 1 serve to position and limit the position of the switch shell 4. The fixing ring 706 between the two limiting plates 705 further fixes the switch shell 4 inside the inner shell 1, ensuring that the switch shell 4 is firmly installed and will not shake or move during operation. The cover plate 707 inside the fixing ring 706 is fixed to the bottom of the switch housing 4, which seals and protects the bottom of the switch housing 4, preventing external impurities from entering the interior of the switch housing 4. The copper tube 708 at the bottom of the large housing 1 is used to connect to the refrigeration equipment system, so that the pressure in the refrigeration equipment system can be accurately transmitted to the interior of the large housing 1 and act on the connecting mechanism 2, thereby realizing the controller's real-time monitoring and control of the refrigeration equipment pressure. This structural design ensures the stable installation and reliable operation of each component inside the controller, improves the overall performance and stability of the controller, and ensures that it can accurately and effectively control the pressure of the refrigeration equipment.

[0039] In use, the pressure of the refrigeration system is transmitted through the copper tube 708 at the bottom of the large outer shell 1. The first diaphragm 201 directly senses the pressure deformation, and its top gasket 202 buffers and evenly transmits the pressure to the small diaphragm 203. The small diaphragm 203 converts the pressure into displacement, pushing the push rod 3 upward. The push rod 3 causes the center of the spring 501 inside the switch housing 4 to bend, causing the moving contact 502 at one end of the spring 501 to separate from the corresponding stationary contact 503, thus breaking the circuit. When the pressure is normal or during manual operation, the push rod 3 moves downward, the spring 501 returns to its original position, and the moving contact 502 contacts the stationary contact 503, thus completing the circuit and realizing automatic on / off control driven by pressure. At the same time, the on / off status signal of the contact is transmitted to the external control equipment via the wire 6. During manual operation, pressing the second pressure rod 702 inside the pressure cap 704 at the top of the large outer shell 1 compresses and pushes the first pressure rod 702. 1. When the first pressure rod 701 moves downward, it deforms the spring 501, changing the contact state between the moving contact 502 and the stationary contact 503, thus realizing manual on / off control. When the operation ends, the spring 703 resets both of them. When it is necessary to retract the wire 6, the wire 6 is inserted into the sleeve 802 and pressed against the inclined surface of the fixing block 803. The fixing block 803 squeezes the spring 804 and then resets to press against the wire 6 to limit its position. When unlocking is required, the pull plate 807 is pulled up, which drives the connecting rod 806 and the pull rod 805 to move the fixing block 803 outward, and the wire 6 can be removed. The space between the large outer shell 1 and the switch outer shell 4 is filled with epoxy 505, which provides insulation to prevent leakage and short circuit, seals against impurities, and fixes the layout of the wire 6. The limit plate 705 inside the large outer shell 1 positions the switch outer shell 4, the fixing ring 706 reinforces and fixes it, and the cover plate 707 seals and protects it, ensuring the stable operation of the internal components and accurately completing the pressure control of the refrigeration equipment.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manual / automatic reset pressure controller for refrigeration equipment, comprising a large outer casing (1), characterized in that: The inner bottom of the large outer shell (1) is provided with a connecting mechanism (2), and a push rod (3) is fixedly connected to the top of the connecting mechanism (2). A switch shell (4) is fixedly connected inside the large outer shell (1). The outside of the push rod (3) is slidably connected to the bottom of the switch shell (4). A contact mechanism (5) is provided inside the switch shell (4). Two wires (6) are electrically connected to the top of the contact mechanism (5). A pressure rod mechanism (7) is provided inside the switch shell (4). The bottom of the pressure rod mechanism (7) is in contact with the contact mechanism (5). The top of the large outer shell (1) is fixedly connected to a positioning mechanism (8), and both of the wires (6) are located inside the positioning mechanism (8).

2. The manual / automatic reset pressure controller for refrigeration equipment according to claim 1, characterized in that: The connecting mechanism (2) includes a first diaphragm (201) fixedly connected to the bottom of the inner shell (1), a gasket (202) fixedly connected to the top of the first diaphragm (201), a small diaphragm (203) fixedly connected to the top of the gasket (202), and the top of the small diaphragm (203) fixedly connected to the push rod (3).

3. The manual / automatic reset pressure controller for refrigeration equipment according to claim 1, characterized in that: The contact mechanism (5) includes a spring (501) disposed inside the switch housing (4), the top of the push rod (3) is in contact with the center of the spring (501), one end of the spring (501) is fixedly connected to a moving contact (502), and a stationary contact (503) corresponding to the moving contact (502) is fixedly connected inside the switch housing (4); both sides of the switch housing (4) are provided with pins (504), the tops of the two pins (504) are electrically connected to wires (6) respectively, the two wires (6) are electrically connected to the moving contact (502) and the stationary contact (503) through the two pins (504), and the tops of the two wires (6) extend out of the top of the large housing (1).

4. The manual / automatic reset pressure controller for refrigeration equipment according to claim 1, characterized in that: The space between the large outer shell (1) and the switch shell (4) is filled with epoxy (505), and both of the wires (6) are located inside the epoxy (505).

5. The manual / automatic reset pressure controller for refrigeration equipment according to claim 3, characterized in that: The lever mechanism (7) includes a first lever (701) and a second lever (702) slidably connected inside the switch housing (4). The bottom of the first lever (701) is in contact with the center of the top of the spring (501). A spring (703) is elastically connected between the second lever (702) and the first lever (701). The two ends of the spring (703) press the first lever (701) and the second lever (702) respectively. The top of the second lever (702) extends to the top of the switch housing (4). A pressure cap (704) is fixedly connected to the top of the large housing (1). One end of the second lever (702) extending outside the switch housing (4) is located inside the pressure cap (704).

6. The manual / automatic reset pressure controller for refrigeration equipment according to claim 1, characterized in that: Two limiting plates (705) are fixedly connected to the bottom of the inner shell (1), and a fixing ring (706) is fixedly connected between the two limiting plates (705). The fixing ring (706) is fixedly connected to the switch shell (4), and a cover plate (707) fixedly connected to the bottom of the switch shell (4) is fixedly connected inside the fixing ring (706); a copper tube (708) is fixedly connected to the bottom of the inner shell (1).

7. The manual / automatic reset pressure controller for refrigeration equipment according to claim 1, characterized in that: The positioning mechanism (8) includes two first brackets (801) fixedly connected to the top of the outer shell (1). Each of the two first brackets (801) is fixedly connected to a sleeve (802). Each of the two sleeves (802) is slidably connected to a fixed block (803) with one end inclined. A second spring (804) is connected between the two fixed blocks (803) and the two sleeves (802). The two ends of the second spring (804) are fixedly connected to the fixed block (803) and the sleeve (802) respectively.

8. The manual / automatic reset pressure controller for refrigeration equipment according to claim 7, characterized in that: The other ends of the two fixed blocks (803) are fixedly connected to pull rods (805), the other ends of the two pull rods (805) are rotatably connected to connecting rods (806), the bottom of the two connecting rods (806) are rotatably connected to pull plates (807), the pull plates (807) are slidably connected to the two first brackets (801), the two first brackets (801) are fixedly connected to the side of the pull plates (807) respectively with limiting grooves (808), and the two ends of the pull plates (807) are respectively located in the two limiting grooves (808).

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