An adjustable jet augmenter valve

Abstract

The utility model discloses an adjustable jet augmenting valve relates to valve technical field. The utility model discloses a valve body, the bottom threaded connection of valve body inner chamber has the pre -tightening adjusting nut, the top of pre -tightening adjusting nut is equipped with the valve core pre -tightening spring, the top of valve core pre -tightening spring is equipped with the valve core, the top of valve core is equipped with the valve port seat, and the inner wall threaded connection of valve port seat and valve body. The utility model discloses through accurate control jet branch refrigerant amount, realizes compressor " quasi -second -stage compression", compared with traditional system, can make the heat pump hot water unit heat quantity obtain the great enhancement, and the energy efficiency ratio also has obtained the great enhancement, still can steady output 60 DEG C hot water under the low temperature environment of -25 DEG C, has greatly enhanced the applicability of unit in cold region, and this equipment simplifies the customer system structure, reduces unnecessary component and complex pipeline design, reduces system assembly difficulty, has reduced manufacturing cost, brings direct economic benefit for the user.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to an adjustable jet enthalpy-increasing valve. Background Technology

[0002] In today's global context of advocating energy conservation and emission reduction, efficient and environmentally friendly hot water supply technologies have become a focus of industry attention. Air source heat pump water heaters, with their significant energy-saving advantages, are gradually becoming the mainstream choice in the hot water supply field. However, in cold regions, the low-temperature environment poses a severe challenge to the performance of air source heat pump water heaters. Traditional air source heat pumps experience a significant drop in heating capacity at low temperatures, making it difficult to meet users' hot water needs. To solve this problem, vapor injection enthalpy enhancement technology has emerged. The mechanically adjustable vapor injection enthalpy enhancement valve, as a key component in the vapor injection enthalpy enhancement system, directly affects the overall system's performance. In-depth research on mechanically adjustable vapor injection enthalpy enhancement valves not only helps improve the applicability of air source heat pump water heaters in cold regions but also promotes the entire industry towards greater efficiency and energy conservation.

[0003] Vapor injection enthalpy enhancement technology plays an irreplaceable role in improving the performance of air source heat pump water heaters. During the operation of a heat pump water heater, the efficiency of the refrigeration cycle directly determines the unit's heating capacity and energy efficiency ratio. In traditional refrigeration cycles, at low temperatures, the evaporation temperature decreases, the compressor's suction volume increases, leading to a reduction in suction volume and consequently a decrease in heating capacity. Vapor injection enthalpy enhancement technology introduces gas at intermediate pressure through an additional suction port in the middle of the compressor. This gas mixes with the partially compressed refrigerant and is then compressed again, achieving "quasi-two-stage compression." This process effectively increases the compressor's discharge volume and improves the cycle's enthalpy difference, thus significantly enhancing the heat pump water heater's heating capacity in low-temperature environments.

[0004] Currently, there are no mechanically adjustable vapor injection enthalpy-enhancing valves available on the domestic market. The closest existing technology is the mechanical liquid injection valve, whose main function is to reduce the compressor's operating temperature by injecting liquid refrigerant when the compressor is running at high temperatures. However, mechanical liquid injection valves can only achieve a single cooling function and cannot precisely control the refrigerant dosage in the injection branch according to different operating conditions to meet the optimized operation requirements of the vapor injection enthalpy-enhancing system. In low-temperature environments, it cannot flexibly adjust the injection volume to enhance heating capacity; in high-temperature environments, inappropriate injection volume may also affect the normal operation of the compressor and reduce the system's energy efficiency ratio.

[0005] To address these issues, we provide an adjustable jet enthalpy-increasing valve. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable jet enthalpy-increasing valve, which solves the problem that existing mechanical liquid injection valves can only reduce the operating temperature of the compressor when the compressor is running at high temperature, through the cooperation of a duty guide rod, a copper bellows, a capillary tube, and a temperature bulb.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to an adjustable jet enthalpy-increasing valve, comprising a valve body, a pre-tightening adjusting nut threadedly connected to the bottom of the valve body cavity, a valve core pre-tightening spring sleeved on the top of the pre-tightening adjusting nut, a valve core sleeved on the top of the valve core pre-tightening spring, a valve port seat sleeved on the top of the valve core, the valve port seat threadedly connected to the inner wall of the valve body, a transmission rod penetrating through the inner cavity of the valve body, the bottom of the transmission rod contacting the top of the valve core, a bellows seat threadedly connected to the top of the valve body, a duty-free guide rod threadedly connected to the inner cavity of the bellows seat, a copper bellows fixedly connected to the bottom of the duty-free guide rod, a connecting seat fixedly connected to the bottom of the copper bellows, the bottom of the connecting seat contacting the top of the transmission rod, a capillary tube communicating with the top of the duty-free guide rod, the other end of the capillary tube communicating with a temperature bulb, and a temperature-sensing mixing medium filling the inner cavity of the temperature bulb.

[0009] The present invention is further configured such that a three-way valve is connected to one side of the valve body, a filter screen is provided in the inner cavity of the three-way valve, a sealing nut is threaded to the top of the three-way valve, and the bottom of the three-way valve is connected to the inlet welding pipe. The filter screen can intercept refrigerant impurities and prevent blockage and wear inside the valve. The sealing nut ensures sealing and facilitates filter screen replacement. The connection with the inlet welding pipe facilitates pipeline assembly.

[0010] The present invention is further configured such that a connecting pipe is connected to the other side of the valve body, and a connecting nut is threaded onto the surface of the connecting pipe. The connecting pipe and the connecting nut cooperate to achieve a quick and secure connection with other pipelines, thereby enhancing the convenience and reliability of the connection between the valve and system components.

[0011] The present invention is further provided that both ends of the capillary are fitted with anti-bending springs, which can effectively prevent it from bending and deforming, ensure the sensing and transmission of temperature and pressure, and ensure that the valve accurately controls the refrigerant dosage.

[0012] The present invention is further configured such that a pre-tightening end sealing nut is threadedly connected to the bottom of the valve body. The pre-tightening end sealing nut facilitates the pre-tightening adjustment and sealing maintenance of the internal structure of the valve, reducing the difficulty of maintenance operations.

[0013] The present invention is further configured such that a filling pipe is connected to one side of the top of the temperature bulb, which facilitates the filling and replenishment of the working fluid inside the temperature bulb, ensuring the normal operation of the temperature bulb and enabling the valve to respond sensitively to changes in operating conditions.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model achieves "quasi-two-stage compression" of the compressor by precisely controlling the refrigerant dosage in the jet branch. Compared with traditional systems, this greatly improves the heating capacity and energy efficiency ratio of the heat pump water heater unit. It can still stably output 60℃ hot water in a low temperature environment of -25℃, which greatly improves the applicability of the unit in cold regions. At the same time, this equipment simplifies the customer's system structure, reduces unnecessary components and complex pipeline design, reduces system assembly difficulty, reduces manufacturing costs, and brings direct economic benefits to users.

[0016] 2. The integrated compressor cooling function of this utility model stabilizes the compressor's operating temperature, avoids performance degradation and malfunctions caused by high temperatures, extends the compressor's service life, and reduces maintenance costs. In addition, the valve is suitable for various heat pump hot water output scenarios, can moderately expand the superheat (supercooling) degree, and has a simple structure, a large opening adjustment range, and stable control effect, providing a reliable guarantee for the efficient and stable operation of the heat pump hot water system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional diagram of an adjustable jet enthalpy-increasing valve.

[0019] Figure 2 This is a side cross-sectional schematic diagram of an adjustable jet enthalpy-increasing valve.

[0020] Figure 3 This is a cross-sectional schematic diagram of the connection structure between the valve core and the valve seat in an adjustable jet enthalpy-increasing valve.

[0021] In the attached diagram: 1. Valve body; 2. Preload adjusting nut; 3. Valve core preload spring; 4. Valve core; 5. Valve port seat; 6. Drive rod; 7. Bellows seat; 8. Occupancy guide rod; 9. Copper bellows; 10. Connecting seat; 11. Capillary tube; 12. Temperature bulb; 13. Three-way valve; 14. Filter screen; 15. Sealing nut; 16. Connecting pipe; 17. Connecting nut; 18. Anti-bend spring; 19. Preload end sealing nut; 20. Filling pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Example 1

[0024] Please see Figure 1-3 This utility model is an adjustable jet enthalpy-increasing valve, including a valve body 1. A pre-tightening adjusting nut 2 is threadedly connected to the bottom of the inner cavity of the valve body 1. A valve core pre-tightening spring 3 is sleeved on the top of the pre-tightening adjusting nut 2. A valve core 4 is sleeved on the top of the valve core pre-tightening spring 3. A valve port seat 5 is sleeved on the top of the valve core 4. The valve port seat 5 is threadedly connected to the inner wall of the valve body 1. A transmission rod 6 is provided through the inner cavity of the valve body 1. The bottom of the transmission rod 6 contacts the top of the valve core 4. A bellows seat 7 is threadedly connected to the top of the valve body 1. A duty-free guide rod 8 is threadedly connected to the inner cavity of the bellows seat 7. A copper bellows 9 is fixedly connected to the bottom of the duty-free guide rod 8. A connecting seat 10 is fixedly connected to the bottom of the copper bellows 9. The bottom of the connecting seat 10 contacts the top of the transmission rod 6. A capillary tube 11 is connected to the top of the duty-free guide rod 8. The other end of the capillary tube 11 is connected to a temperature bulb 12. The inner cavity of the temperature bulb 12 is filled with a temperature-sensing mixing medium.

[0025] Specifically: the ratio of the inlet diameter at the top of the valve seat 5 to the outlet diameter at the bottom is controlled at 1.58-1.67. The temperature-sensing mixed medium filling the inner cavity of the temperature bulb 12 is formulated as follows: ethyl formate 94.4%, toluene 2%, silicone oil (0.68cst) 2%, boron nitride (1um) 0.1%, and polyoxyethylene dehydrated sorbitan monooleate (Tween-80) 1.5%. Among them, ethyl formate dominates vapor pressure, toluene optimizes linearity, silicone oil compensates for thermal expansion, and boron nitride and polyoxyethylene dehydrated sorbitan monooleate optimize heat conduction.

[0026] Example 2

[0027] Please see Figure 1-3 Based on Embodiment 1, a three-way valve 13 is connected to one side of the valve body 1. A filter screen 14 is provided in the inner cavity of the three-way valve 13. A sealing nut 15 is threadedly connected to the top of the three-way valve 13. The bottom of the three-way valve 13 is connected to the air inlet welding pipe. A connecting pipe 16 is connected to the other side of the valve body 1. A connecting nut 17 is threadedly connected to the surface of the connecting pipe 16. Anti-bending springs 18 are fitted at both ends of the capillary tube 11. A pre-tightening end sealing nut 19 is threadedly connected to the bottom of the valve body 1. A filling pipe 20 is connected to the top side of the temperature bulb 12.

[0028] Specifically: the filter screen 14 can intercept refrigerant impurities, preventing blockage and wear inside the valve; the sealing nut 15 ensures sealing and facilitates filter screen 14 replacement; it connects to the inlet welded pipe for convenient pipeline assembly; the connecting pipe 16 and the connecting nut 17 cooperate to achieve quick and secure connection with other pipelines, enhancing the convenience and reliability of valve connection with system components; the anti-bending spring 18 effectively prevents bending and deformation, ensuring the sensing and transmission of temperature and pressure, ensuring the valve accurately controls the refrigerant dosage; the pre-tightening end sealing nut 19 facilitates pre-tightening adjustment and sealing maintenance of the valve's internal structure, reducing maintenance difficulty; the charging pipe 20 facilitates the charging and replenishment of the working fluid in the temperature bulb 12, ensuring the normal operation of the temperature bulb 12 and enabling the valve to respond sensitively to changes in operating conditions.

[0029] The working principle of this utility model is as follows: The temperature bulb 12 is inserted into the pre-placed pipe seat at the outlet of the heat pump compressor. The temperature sensing medium inside the temperature bulb 12 senses the temperature (boiling point of ethyl formate: 54℃). When it reaches 90℃, the mixture evaporates and expands in volume. Through the occupancy guide rod 8, it forces the copper bellows 9 to expand, pushing the transmission rod 6 to overcome the valve closing force (24-25N) preset by the valve core pre-tensioning spring 3, causing the valve core 4 to move away from the valve port at the bottom of the valve seat 5 (0.48mm-0.50mm). The valve port is opened, and part of the high-pressure liquid refrigerant is throttled and depressurized after passing through the three-way valve 13 and the filter screen 14, and then sent to the subcooler for evaporation through the valve outlet. The generated medium-pressure gas is then added to the compressor, and the medium-pressure gas is injected into the compressor cavity until it reaches the specified temperature. At the 120℃ mechanical position (3.8mm-4.0mm space reserved from the copper bellows 9 to the top of the valve body 1), the dynamic response (3.78mm) is achieved by precisely controlling the refrigerant charge in the jet branch, thus realizing the quasi-two-stage compression of the compressor, increasing the exhaust volume and cyclic enthalpy difference, improving heating capacity and energy efficiency. At the same time, the medium-pressure gas entering the compressor can cool the compressor cavity temperature and extend the compressor life. Conversely, the temperature sensing temperature drops and the output pressure of the temperature bulb 12 decreases. Under the deformation pressure (K×spring compression mm) of the valve core preload spring 3, the valve core 4 approaches the valve port until it is completely closed. Because the premixed boron nitride (1μm level) in the mixture improves the thermal conductivity, the temperature drop hysteresis performance is controlled at 1℃~2℃, improving the response performance.

[0030] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. An adjustable jet enthalpy-increasing valve, comprising a valve body (1), characterized in that: The bottom of the inner cavity of the valve body (1) is threaded with a pre-tightening adjusting nut (2), the top of the pre-tightening adjusting nut (2) is fitted with a valve core pre-tightening spring (3), the top of the valve core pre-tightening spring (3) is fitted with a valve core (4), the top of the valve core (4) is fitted with a valve port seat (5), the valve port seat (5) is threadedly connected to the inner wall of the valve body (1), and a transmission rod (6) is provided through the inner cavity of the valve body (1), the bottom of the transmission rod (6) is in contact with the top of the valve core (4); The top of the valve body (1) is threaded with a bellows seat (7), the inner cavity of the bellows seat (7) is threaded with a vacancy guide rod (8), the bottom of the vacancy guide rod (8) is fixedly connected with a copper bellows (9), the bottom of the copper bellows (9) is fixedly connected with a connecting seat (10), the bottom of the connecting seat (10) is in contact with the top of the transmission rod (6), the top of the vacancy guide rod (8) is connected to a capillary tube (11), the other end of the capillary tube (11) is connected to a temperature bulb (12), and the inner cavity of the temperature bulb (12) is filled with a temperature-sensing mixing medium.

2. The adjustable jet enthalpy-increasing valve according to claim 1, characterized in that: A three-way valve (13) is connected to one side of the valve body (1). A filter screen (14) is provided in the inner cavity of the three-way valve (13). A sealing nut (15) is threaded to the top of the three-way valve (13). The bottom of the three-way valve (13) is connected to the air inlet welding pipe.

3. The adjustable jet enthalpy-increasing valve according to claim 1, characterized in that: The valve body (1) is connected to a connecting pipe (16) on the other side, and a connecting nut (17) is threaded onto the surface of the connecting pipe (16).

4. The adjustable jet enthalpy-increasing valve according to claim 1, characterized in that: Both ends of the capillary tube (11) are fitted with anti-bend springs (18).

5. The adjustable jet enthalpy-increasing valve according to claim 1, characterized in that: The bottom of the valve body (1) is threaded with a pre-tightening end sealing nut (19).

6. The adjustable jet enthalpy-increasing valve according to claim 1, characterized in that: The top side of the heating element (12) is connected to a filling tube (20).

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