Cooling device of injection mold
By using a dual heat exchanger design and waste heat recovery, the energy waste problem of injection mold cooling devices is solved, and efficient synergistic operation of cooling and heating is achieved, reducing energy consumption and improving heat exchange efficiency.
Patent Information
- Application Number
- CN202520400397.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Existing chillers for injection mold cooling release waste heat directly into the environment during operation, resulting in energy waste, difficulty in meeting winter heating needs, and difficulty in efficiently coordinating cooling and heating systems.
The machine adopts a dual heat exchanger design, combining refrigerant waste heat and mold cooling pipe waste heat. Through refrigeration cycle and waste heat recovery, it provides a heating source. Spiral coils and heat dissipation fins are used to improve heat exchange efficiency. A water filter is installed to prevent clogging. The frame and casters facilitate movement.
It enables the cascade utilization of energy, reduces energy consumption for cooling and heating, reduces operating costs, improves heat exchange efficiency, and provides flexibility to adapt to different working scenarios.
Smart Images
Figure CN223803044U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to injection mold auxiliary equipment technical field, concretely relates to a cooling device of injection mold. BACKGROUND
[0002] In the injection molding process, the temperature control of injection mold plays a key role in the quality and production efficiency of plastic products. The traditional cooling method of injection mold mainly relies on the cooling of water chiller, and the heat generated by the mold is taken away by the circulating cold water to ensure that the mold works in the appropriate temperature range. However, the existing water chiller for cooling injection mold has some problems in the running process.
[0003] From the perspective of energy utilization, while the water chiller takes away the heat of the mold, a large amount of waste heat is directly discharged into the environment, causing great waste of energy. Especially in winter, factories often need to consume a large amount of energy for heating. But the temperature of the waste heat of the water chiller is basically 30-50°, which cannot meet the heating demand, so it is difficult to accurately match the operation requirements of the existing heating system. In summary, the existing water chiller for cooling injection mold has many deficiencies in waste heat utilization, and there is an urgent need for a cooling device of injection mold that can effectively solve the above problems and realize the efficient collaborative operation of injection mold cooling and waste heat recovery heating. SUMMARY
[0004] To achieve the above purpose, the utility model provides the following technical scheme: a cooling device of injection mold, comprising a compressor, a condenser, an expansion valve, an evaporator and an injection mold cooling pipeline, the water inlet of the injection mold cooling pipeline is connected with the water outlet of the evaporator, a first heat exchanger and a second heat exchanger are installed between the outlet of the compressor and the inlet of the condenser, the first heat exchanger comprises a first shell, a spiral coil is installed inside the first shell, one end of the spiral coil is connected with the high-temperature and high-pressure refrigerant gas of the outlet of the compressor, the other end of the spiral coil is connected with the inlet of the condenser, the water outlet of the injection mold cooling pipeline is connected with the top of the first shell, the second heat exchanger comprises a second shell, a heat exchanger fan is installed at the top end of the second shell, a heat dissipation pipe is fixed inside the second shell, one end of the heat dissipation pipe is connected with the first shell, the other end of the heat dissipation pipe is connected with the backwater inlet of the evaporator, and the second shell bottom end is connected with a heating air pipe.
[0005] As a preferred technical scheme of the utility model, the heat dissipation fins are uniformly welded on the surface of the heat dissipation pipe.
[0006] As a preferred technical scheme of the utility model, the spiral coil is in a spiral structure and is made of pure copper.
[0007] As a preferred technical scheme of the utility model, the high-temperature and high-pressure refrigerant gas is R134a or R410A refrigerant.
[0008] As a preferred technical scheme of the utility model, a water quality filter is installed between the water outlet of the injection mold cooling pipeline and the first heat exchanger, and the water quality filter is a detachable filter element structure.
[0009] As a preferred technical scheme of the utility model, a rack is installed outside the compressor, the condenser, the expansion valve, the evaporator, the first heat exchanger and the second heat exchanger of the injection mold cooling pipeline, and a universal wheel with a brake is installed at the bottom of the rack.
[0010] Compared with the prior art, the utility model has the beneficial effects that: the utility model combines the refrigerant waste heat directly discharged into the environment and the waste heat in the injection mold cooling pipeline through the unique double heat exchanger design, thereby providing a heat source for winter heating. The utility model avoids the unnecessary waste of energy, realizes the step-by-step utilization of energy, and greatly reduces the total energy consumption of the factory in refrigeration and heating. Compared with the traditional injection mold cooling system and the independent heating system, the utility model can significantly reduce energy consumption and operating costs. The spiral coil greatly increases the heat exchange area and effectively improves the heat exchange efficiency. In the condensation process of the refrigeration cycle, the heat of the refrigerant can be transferred to the cooling water more quickly, the working load of the compressor is reduced, and the power consumption is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0011] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:
[0012] Fig. 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Fig. 2 It is a schematic diagram of the cross-sectional structure of the rack in the utility model;
[0014] In the drawing: 1, compressor; 2, condenser; 3, expansion valve; 4, evaporator; 5, injection mold cooling pipeline; 6, first shell; 7, spiral coil; 8, second shell; 9, heat exchange fan; 10, heat dissipation pipe; 11, heating air pipe; 12, heat dissipation fin; 13, water quality filter; 14, rack; 15, universal wheel with brake. DETAILED DESCRIPTION
[0015] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0016] Embodiment
[0017] Please refer to Figs. 1-2 The utility model provides the following technical scheme: a cooling device of injection mold, including compressor 1, condenser 2, expansion valve 3, evaporator 4 and injection mold cooling pipeline 5, the water inlet of injection mold cooling pipeline 5 is connected with the water outlet of evaporator 4, and the first heat exchanger and the second heat exchanger are installed between the outlet of compressor 1 and the inlet of condenser 2, the first heat exchanger includes first shell 6, and spiral coil pipe 7 is installed in first shell 6, one end of spiral coil pipe 7 is connected with high-temperature high-pressure refrigerant gas of the outlet of compressor 1, the other end of spiral coil pipe 7 is connected with the inlet of condenser 2, the top of first shell 6 is connected with the water outlet of injection mold cooling pipeline 5, the second heat exchanger includes second shell 8, heat exchange fan 9 is installed at the top of second shell 8, and heat dissipation pipe 10 is fixed in second shell 8, one end of heat dissipation pipe 10 is connected with first shell 6, the other end of heat dissipation pipe 10 is connected with the return water inlet of evaporator 4, and heating air pipe 11 is connected to the bottom end of second shell 8.
[0018] In order to increase the surface area of the heat dissipation pipe 10 and increase the heat exchange capacity, in the embodiment, as a preferred technical solution of the utility model, the surface of the heat dissipation pipe 10 is uniformly welded with heat dissipation fins 12.
[0019] In order to increase the heat exchange path length of the pipe body and improve the heat exchange efficiency, in the embodiment, as a preferred technical solution of the utility model, the spiral coil pipe 7 is in a spiral structure and is made of pure copper.
[0020] In order to avoid the use of low-temperature refrigerant leading to insufficient heating capacity, in the embodiment, as a preferred technical solution of the utility model, the high-temperature high-pressure refrigerant gas is R134a or R410A refrigerant, and R134a or R410A is a common industrial refrigerant, and its high-temperature characteristics (70-100 DEG C) can ensure that the heat exchanger effectively raises the water temperature.
[0021] In order to filter rust and impurities in the cooling water and prevent the heat exchanger from being blocked, in the embodiment, as a preferred technical solution of the utility model, a water quality filter 13 is installed between the water outlet of the injection mold cooling pipeline 5 and the first heat exchanger, and the water quality filter 13 is a detachable filter element structure.
[0022] In order to facilitate the equipment to move quickly in different workshop positions, adapt to the production line adjustment, in the embodiment, as a preferred technical scheme of the utility model, the compressor 1, the condenser 2, the expansion valve 3, the evaporator 4, the injection mold cooling pipeline 5, the first heat exchanger and the second heat exchanger outside are provided with the rack 14, and the rack 14 bottom is provided with the universal wheel 15 with brake.
[0023] In summary, by means of the above technical scheme of the utility model, in the operation process of the injection mold cooling device, its working principle covers two key parts of refrigeration cycle and waste heat recycling.
[0024] Refrigeration cycle working principle
[0025] Compression process: the compressor 1 is used as the power source of the refrigeration cycle, absorbs the low-temperature and low-pressure gaseous refrigerant, compresses it by mechanical work, makes it into high-temperature and high-pressure refrigerant gas, the temperature usually reaches 70-100 DEG C, depends on the refrigerant type and compression ratio, the pressure also increases correspondingly. In this process, the compressor consumes electric energy, provides energy for the circulation of the refrigerant, so that the refrigerant has the ability to release heat subsequently.
[0026] Condensation process: the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 first enters the first heat exchanger. In the first heat exchanger, the high-temperature and high-pressure refrigerant gas is heat exchanged by the spiral pipe 7. The spiral pipe 7 is in spiral structure, and the copper pipe material is used for hard brazing. This structure and material can effectively increase the heat exchange area and improve the heat exchange efficiency. The cooling water flowing out of the injection mold cooling pipeline 5, the temperature is 30-50 DEG C, enters from the top of the first shell 6, and is heat exchanged with the high-temperature and high-pressure refrigerant gas in the spiral pipe 7. In the heat exchange process, the heat of the refrigerant gas is transferred to the cooling water, and the temperature of the refrigerant gas is reduced. In order to avoid that the refrigerant "steals" too much heat, resulting in insufficient heat dissipation of the condenser 2 and the refrigeration capacity of the water chiller is reduced, the heat exchange path length of the spiral pipe 7 can be customized, and 20-30% of the heat of the refrigerant is extracted. The remaining heat is still discharged by the condenser 2 to ensure normal refrigeration cycle. After that, the refrigerant cooled and partially condensed continues to flow into the condenser 2, and further exchanges heat with the outside environment in the condenser 2, completes the whole condensation process, and becomes liquid refrigerant.
[0027] Throttling process: the liquid refrigerant from the condenser 2 is throttled and decompressed by the expansion valve 3. The expansion valve 3 controls the valve opening degree, so that the liquid refrigerant is decompressed in a short time, and the temperature of the refrigerant is reduced at the same time, becoming low-temperature and low-pressure gas-liquid mixed state refrigerant.
[0028] Evaporation process: the low-temperature and low-pressure gas-liquid mixed refrigerant enters the evaporator 4, and in the evaporator 4, the refrigerant exchanges heat with the water in the injection mold cooling pipeline 5. Because the temperature of the refrigerant is lower than that of the water in the injection mold cooling pipeline 5, heat is transferred from the cooling water to the refrigerant, so that the refrigerant absorbs heat and evaporates into a gaseous state, and the temperature of the cooling water decreases, realizing the cooling effect of the injection mold. The gaseous refrigerant is sucked into the compressor 1 again, starting a new refrigeration cycle.
[0029] Waste heat recovery working principle
[0030] First heat exchange: as described above in the condensation process of the refrigeration cycle, the cooling water flowing out of the mold cooling pipeline 5 exchanges heat with the high-temperature and high-pressure refrigerant gas discharged by the compressor 1 in the first heat exchanger. This makes the temperature of the cooling water further increase from 30-50°C to 50-70°C, and the refrigerant heat originally lost to the environment is effectively utilized, increasing the temperature of the cooling water and providing a more suitable heat source for subsequent heating.
[0031] Second heat exchange: the hot water heated by the first heat exchanger flows into the heat dissipation pipe 10 of the second heat exchanger. The surface of the heat dissipation pipe 10 is uniformly welded with heat dissipation fins 12, which greatly increases the contact area between the heat dissipation pipe 10 and the air, improving the heat dissipation efficiency. At the top end of the second shell 8, the heat exchange fan 9 continuously works to suck cold air from the heating air pipe 11 at the bottom end of the second shell 8. The cold air exchanges heat with the hot water in the heat dissipation pipe 10, and the temperature of the cold air increases after absorbing the heat of the hot water, becoming hot air that is blown out from the heating air pipe 11 for winter heating. The hot water in the heat dissipation pipe 10 releases heat and its temperature decreases, flowing back to the water outlet of the evaporator 4 to participate in the cooling cycle of the injection mold again.
[0032] Auxiliary structure guarantee: a water quality filter 13 is installed between the water outlet of the injection mold cooling pipeline 5 and the first heat exchanger, and the water quality filter 13 is a detachable filter element structure. It can effectively filter impurities in the cooling water, prevent impurities from entering the heat exchanger, avoid blocking the pipeline and affecting the heat exchange efficiency, and ensure the stable operation of the entire system. At the same time, the compressor 1, the condenser 2, the expansion valve 3, the evaporator 4, the injection mold cooling pipeline 5, the first heat exchanger and the second heat exchanger are installed outside the rack 14, and the rack 14 is installed with a brake universal wheel 15 at the bottom, which facilitates the movement and fixation of the equipment, and facilitates flexible use in different working scenes.
[0033] Finally should be explained: in the utility model, unless there is definite provision and limitation, the term "installation", "arrangement", "connection", "fix", "screw joint" and so on should be understood broadly, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through intermediate medium, can be the communication or the interaction relationship of two elements inside two elements, unless there is definite limitation, for the ordinary skilled person in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.
[0034] The above only for the preferred embodiment of the utility model has been, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiment, for the ordinary skilled person in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.
Claims
1. A cooling device for injection mold comprising a compressor (1), a condenser (2), an expansion valve (3), an evaporator (4) and an injection mold cooling line (5), the water inlet of the injection mold cooling line (5) is connected to the water outlet of the evaporator (4), characterized in that: The first heat exchanger and the second heat exchanger are installed between the compressor (1) outlet and the condenser (2) inlet, the first heat exchanger comprises a first shell (6), a spiral coil (7) is installed inside the first shell (6), one end of the spiral coil (7) is connected with high-temperature and high-pressure refrigerant gas of the compressor (1) outlet, the other end of the spiral coil (7) is connected with the condenser (2) inlet, the top of the first shell (6) is connected with the water outlet of the injection mold cooling pipeline (5), the second heat exchanger comprises a second shell (8), a heat exchange fan (9) is installed at the top of the second shell (8), a heat dissipation pipe (10) is fixed inside the second shell (8), one end of the heat dissipation pipe (10) is connected with the first shell (6), the other end of the heat dissipation pipe (10) is connected with the water return port of the evaporator (4), the bottom of the second shell (8) is connected with a heating air pipe (11).
2. A cooling device for injection molds according to claim 1, characterized in that: The heat dissipation fin (12) is uniformly welded on the surface of the heat dissipation pipe (10).
3. A cooling device for injection molds according to claim 1, characterized in that: The spiral coil (7) is in a spiral structure and is made of pure copper.
4. A cooling device for injection molds according to claim 1, characterized in that: The high-temperature and high-pressure refrigerant gas is R134a or R410A refrigerant.
5. A cooling device for injection molds according to claim 1, characterized in that: A water quality filter (13) is installed between the water outlet of the injection mold cooling pipeline (5) and the first heat exchanger, and the water quality filter (13) is a detachable filter element structure.
6. A cooling device for injection molds according to claim 1, characterized in that: A rack (14) is installed outside the compressor (1), the condenser (2), the expansion valve (3), the evaporator (4), the injection mold cooling pipeline (5), the first heat exchanger and the second heat exchanger, and a universal wheel (15) with brake is installed at the bottom of the rack (14).