A high-efficiency economizer with reduced refrigerant pressure drop

Abstract

The utility model provides a kind of high-efficiency economizer with the function of reducing refrigerant pressure drop, including the heat exchange shell with working substance heat exchange cavity, the working substance heat exchange cavity is coiled with heat exchange water pipe, wherein, the working substance heat exchange cavity is equipped with enthalpy-increasing heat exchange pipe and honeycomb plate, the honeycomb plate is equipped with recess, the enthalpy-increasing heat exchange pipe is coiled in honeycomb plate while being adaptively fixedly connected on recess, to form microchannel for working substance circulation and heat exchange between enthalpy-increasing heat exchange pipe and honeycomb plate, the microchannel is communicated with working substance heat exchange cavity. Structure fastening, reduce noise when operating, and expand heat exchange area, fully utilize refrigerant temperature in working substance heat exchange cavity, increase enthalpy difference, improve the heat exchange amount of refrigerant enthalpy-increasing, effectively reduce the refrigerant resistance pressure drop in enthalpy-increasing liquid pipe, ensure the use effect of product.

Description

Technical Field

[0001] This utility model relates to the technical field of economizers, specifically a high-efficiency economizer with the function of reducing refrigerant pressure drop. Background Technology

[0002] With the continuous improvement of living standards, existing heat pump systems are widely used, utilizing the heat absorption and release phenomena generated by the liquid and gas phase changes of the refrigerant. For example, in the air conditioning cooling process, the refrigerant is drawn into the compressor and compressed, then releases heat and condenses into a liquid in the condenser. It then passes through a throttling device to reduce its pressure, and finally enters the heat exchanger to absorb heat and evaporate, returning to the compressor as vapor, thus realizing the refrigeration cycle and regulating the temperature of the medium or the surrounding environment. In the air conditioning heating process, the refrigerant is drawn into the compressor and compressed, then releases heat and condenses in the heat exchanger. It then passes through a throttling device to reduce its pressure, and finally enters the evaporator to absorb heat and evaporate into a gas, flowing back to the compressor.

[0003] However, under low outdoor temperatures, refrigerant evaporation is difficult, the compressor suction pressure is too low, the compressor power is reduced, resulting in insufficient compressor suction volume, poor heating effect of heat pump air conditioning units, and insufficient heating capacity.

[0004] To address this, existing units employ vapor injection enthalpy enhancement to increase heating capacity while ensuring the compressor remains operational. These units typically utilize a vapor injection enthalpy enhancer economizer. This economizer subcools the refrigerant in the main circulation loop before throttling, increasing the system's enthalpy difference and thus improving heating capacity. Simultaneously, it appropriately preheats the low-pressure, low-temperature refrigerant in the auxiliary loop (where the refrigerant is introduced directly from the compressor's center and participates in compression) after pressure reduction via the expansion valve, achieving a suitable intermediate pressure. This preheated refrigerant vapor is then connected to the compressor's enthalpy enhancement port to supplement refrigerant vapor, providing secondary compression to increase the amount of circulating refrigerant for condenser heating and the compressor's discharge volume, thereby increasing heating capacity.

[0005] However, existing jet enthalpy enhancers have the following shortcomings in practical applications:

[0006] 1) The jet enthalpy-enhancing heat exchange tube of the existing economizer is too long, resulting in a large pressure drop of the refrigerant inside the enthalpy-enhancing heat exchange tube.

[0007] 2) The existing economizer uses an immersion heat exchange method, which has weak convection and low heat exchange efficiency.

[0008] 3) Existing economizers generate noise during operation and have poor heat dissipation. Summary of the Invention

[0009] The purpose of this invention is to address the shortcomings of existing technologies by proposing a highly efficient and economical device with the function of reducing refrigerant pressure drop.

[0010] The purpose of this invention is achieved as follows: a high-efficiency economizer with refrigerant pressure drop reduction function, comprising a heat exchange shell with a working fluid heat exchange cavity, wherein a heat exchange water pipe is coiled around the working fluid heat exchange cavity, wherein the working fluid heat exchange cavity is provided with an enthalpy-increasing heat exchange tube and a honeycomb plate, the honeycomb plate is provided with a groove, and the enthalpy-increasing heat exchange tube is coiled around the honeycomb plate and adapted and fixedly connected to the groove, so that a microchannel for working fluid flow and heat exchange is formed between the enthalpy-increasing heat exchange tube and the honeycomb plate, and the microchannel communicates with the working fluid heat exchange cavity.

[0011] Based on the above optimization, the heat exchange shell is provided with a working fluid input cavity, and the working fluid input cavity has a through hole communicating with the working fluid heat exchange cavity. The working fluid input cavity, the through hole, the microchannel, and the working fluid heat exchange cavity form a secondary subcooling channel for reducing the refrigerant pressure drop.

[0012] Based on the above optimization, the honeycomb plates are respectively installed on the upper and lower sides of the enthalpy-increasing heat exchange tube, so that the enthalpy-increasing heat exchange tube is fixedly coiled around the bottom of the working fluid heat exchange cavity.

[0013] Based on the above optimization, the honeycomb panels are fixedly connected to each other by fasteners, and an installation slot is formed between the honeycomb panels to accommodate the fixed installation of the enthalpy-increasing heat exchange tube.

[0014] Based on the above optimization, the enthalpy-increasing heat exchange tube is set as an enthalpy-increasing aluminum liquid tube.

[0015] Based on the above optimization, the honeycomb panel is set as a heat-dissipating honeycomb aluminum plate.

[0016] The advantages of this utility model are:

[0017] 1) By adding a honeycomb plate to this structure, the grooves are in contact with the surface of the enthalpy-increasing heat exchange tube, which expands the heat exchange area, makes full use of the refrigerant temperature in the working fluid heat exchange cavity, increases the enthalpy difference, and forms a microchannel between the honeycomb plate and the enthalpy-increasing heat exchange tube. The structure is simple, improves the heat exchange of the refrigerant enthalpy increase, and effectively reduces the refrigerant resistance pressure drop in the enthalpy-increasing liquid tube.

[0018] 2) By adding the honeycomb plate of this structure, which is set on the upper and lower sides of the enthalpy-increasing heat exchange tube, the enthalpy-increasing heat exchange tube is fixed, the structure is sturdy, and the noise during operation is reduced. At the same time, due to the characteristics of the heat dissipation fixing plate and the enthalpy-increasing liquid tube, better heat dissipation function is provided.

[0019] 3) Because the enthalpy-increasing heat exchange tubes are coiled on the honeycomb plate, the amount of heat exchange tubes used and the tube length are reduced, which enables strong convection between the refrigerant and water and improves the heat exchange efficiency. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0021] Appendix Figure 2This is a partial enlarged view of a preferred embodiment of the present invention. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] According to the appendix Figures 1 to 2 As shown, the high-efficiency economizer with refrigerant pressure drop reduction function of this utility model includes a heat exchange shell 1 with a working fluid heat exchange cavity 11. The working fluid heat exchange cavity 11 is wound with a heat exchange water pipe 2. The working fluid heat exchange cavity 11 is provided with an enthalpy-increasing heat exchange pipe 3 and a honeycomb plate 4. The honeycomb plate 4 is provided with a groove 41. The enthalpy-increasing heat exchange pipe 3 is wound around the honeycomb plate 4 and is adapted and fixedly connected to the groove 41, so that a microchannel 5 for working fluid flow and heat exchange is formed between the enthalpy-increasing heat exchange pipe 3 and the honeycomb plate 4. The microchannel 5 is connected to the working fluid heat exchange cavity 11.

[0024] In actual operation, the heat exchange shell 1 is provided with a working fluid input cavity 12, and the working fluid input cavity 12 has a through hole 13 communicating with the working fluid heat exchange cavity 11. The working fluid input cavity 12, the through hole 13, the microchannel 5, and the working fluid heat exchange cavity 11 form a secondary subcooling channel for reducing the refrigerant pressure drop.

[0025] During operation, high-temperature and high-pressure refrigerant superheated steam flows from the compressor exhaust port into the working fluid input chamber 12, through hole 13, microchannel 5, and working fluid heat exchange chamber 11. During this process, the high-temperature and high-pressure refrigerant in the working fluid heat exchange chamber 11 condenses and releases heat to form liquid refrigerant. At the same time, the water in the hot water pipe 2 absorbs the heat released by the refrigerant and becomes high-temperature hot water for user use.

[0026] Next, the liquid refrigerant in this economizer flows through two paths: one path is through a throttling device to reduce its pressure, then to other heat exchangers in the unit for evaporation and heat absorption, becoming low-temperature, low-pressure refrigerant saturated vapor, which returns to the compressor; the other path flows to the enthalpy-increasing heat exchange tube 3 of this economizer. Due to the structural cooperation between the enthalpy-increasing heat exchange tube 3 and the honeycomb plate 4, the refrigerant in the secondary subcooled liquid chamber and the refrigerant in the enthalpy-increasing heat exchange tube 3 undergo further heat exchange, making the refrigerant in the secondary subcooled liquid chamber subcooled before throttling, increasing the system enthalpy difference, increasing the heating capacity, and improving the heating effect. The low-pressure, low-temperature refrigerant in the enthalpy-increasing heat exchange tube 3 is appropriately preheated. In this way, the refrigerant saturated vapor is superheated before returning to the compressor to reach a suitable medium pressure for secondary compression by the compressor, which also increases the refrigerant discharge volume of the compressor, greatly increasing the circulating refrigerant volume for heating in the hot water exchange tube 2, thereby increasing the heating capacity.

[0027] Reference Figures 1 to 2 As shown, in a more detailed manner, the honeycomb plate 4 is respectively installed on the upper and lower sides of the enthalpy-increasing heat exchange tube 3 so that the enthalpy-increasing heat exchange tube 3 is fixedly coiled around the bottom of the working fluid heat exchange cavity 11.

[0028] The honeycomb panels 4 are fixedly connected to each other by fasteners 6, and an installation groove is formed between the honeycomb panels 4 to accommodate the fixed installation of the enthalpy-increasing heat exchange tube 3.

[0029] By adding a honeycomb plate 4 to the structure, which is located on the upper and lower sides of the enthalpy-increasing heat exchange tube 3, the enthalpy-increasing heat exchange tube 3 is fixed, the structure is sturdy, and the noise during operation is reduced.

[0030] Furthermore, the enthalpy-increasing heat exchange tube 3 is configured as an enthalpy-increasing aluminum liquid tube, and the honeycomb plate 4 is configured as a heat-dissipating honeycomb aluminum plate. Utilizing the inherent characteristics of the heat dissipation fixing plate and the enthalpy-increasing liquid tube, better heat dissipation is provided.

[0031] Meanwhile, the enthalpy-increasing heat exchange tube 3 is coiled in the mounting slot between the honeycomb plates 4, reducing the amount and length of the tube, and enabling strong convection between the refrigerant and water, thereby improving the heat exchange efficiency.

[0032] The above specific embodiments are only specific implementations of the present utility model with better effects. All structures that are the same as or equivalent to the high-efficiency economizer with refrigerant pressure drop function of the present utility model are within the protection scope of the present utility model.

Claims

1. A high-efficiency economizer with refrigerant pressure drop reduction function, comprising a heat exchange shell (1) having a working fluid heat exchange cavity (11), wherein a hot water pipe (2) is coiled around the working fluid heat exchange cavity (11), characterized in that: The working fluid heat exchange cavity (11) is provided with an enthalpy-increasing heat exchange tube (3) and a honeycomb plate (4). The honeycomb plate (4) is provided with a groove (41). The enthalpy-increasing heat exchange tube (3) is wound around the honeycomb plate (4) and is adapted and fixedly connected to the groove (41) so that a microchannel (5) for working fluid flow and heat exchange is formed between the enthalpy-increasing heat exchange tube (3) and the honeycomb plate (4). The microchannel (5) is connected to the working fluid heat exchange cavity (11).

2. The high-efficiency economizer with refrigerant pressure drop reduction function according to claim 1, characterized in that: The heat exchange shell (1) is provided with a working fluid input cavity (12), and the working fluid input cavity (12) has a through hole (13) communicating with the working fluid heat exchange cavity (11). The working fluid input cavity (12), through hole (13), microchannel (5), and working fluid heat exchange cavity (11) form a secondary subcooling channel for reducing refrigerant pressure drop.

3. The high-efficiency economizer with refrigerant pressure drop reduction function according to claim 1, characterized in that: The honeycomb plate (4) is installed on the upper and lower sides of the enthalpy-increasing heat exchange tube (3) so that the enthalpy-increasing heat exchange tube (3) is fixedly coiled around the bottom of the working fluid heat exchange cavity (11).

4. The high-efficiency economizer with refrigerant pressure drop reduction function according to claim 1, characterized in that: The honeycomb panels (4) are fixedly connected to each other by fasteners (6), and an installation slot is formed between the honeycomb panels (4) to accommodate the fixed installation of the enthalpy-increasing heat exchange tube (3).

5. The high-efficiency economizer with refrigerant pressure drop reduction function according to claim 1, characterized in that: The enthalpy-increasing heat exchange tube (3) is configured as an enthalpy-increasing aluminum liquid tube.

6. The high-efficiency economizer with refrigerant pressure drop reduction function according to claim 1, characterized in that: The honeycomb panel (4) is configured as a heat-dissipating honeycomb aluminum plate.

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