Elevator air conditioner with secondary condensation function

Abstract

The invention discloses an elevator air conditioner with a secondary condensation function. The elevator air conditioner comprises a compressor, a condenser and an evaporator. The output end of the compressor is communicated with the input end of the condenser through a first pipeline; the output end of the condenser is communicated with the input end of the evaporator through a second pipeline; the output end of the evaporator is communicated with the input end of the compressor through a third pipeline; wherein the second pipeline is provided with a heat exchange pipe section, a wrapping part is arranged between the heat exchange pipe section and the third pipeline, and a pipe-in-pipe structure is formed. By arranging the pipe-in-pipe structure of the second pipeline and the third pipeline and utilizing the heat absorption effect of the low-temperature and low-pressure gaseous refrigerant in the third pipeline, the gas-liquid mixed refrigerant which is not completely condensed in the second pipeline is subjected to secondary condensation, so that the problem of insufficient primary condensation in a high-temperature environment is effectively solved, and the condensation efficiency is improved. The refrigerant entering the evaporator is mainly in a liquid state, and the refrigeration effect is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator air conditioners, and in particular to an elevator air conditioner with a secondary condensation function. Background Art

[0002] When the elevator air conditioner is started, the refrigerant is compressed into a high-temperature and high-pressure gas by the compressor and then flows to the condenser. The condenser dissipates heat and condenses it into a high-pressure liquid refrigerant at room temperature. However, if the air conditioner is in a high-temperature environment (43-45°C) at this time, the refrigerant cannot be completely condensed into a high-pressure pure liquid. The refrigerant that has not completely dissipated heat is in a gas-liquid mixed state in the condenser pipe. The high-temperature and high-pressure gas-liquid mixed refrigerant enters the evaporator through the capillary tube, which will directly affect the cooling effect of the elevator air conditioner. Summary of the Invention

[0003] In order to overcome the above technical defects, the present invention provides an elevator air conditioner with a secondary condensation function, which aims to solve the problems in the background technology.

[0004] The present invention is implemented according to the following technical solutions:

[0005] The present invention discloses an elevator air conditioner with a secondary condensation function, comprising:

[0006] compressor, condenser, and evaporator;

[0007] The output end of the compressor is connected to the input end of the condenser through a first pipe;

[0008] The output end of the condenser is connected to the input end of the evaporator through a second pipe;

[0009] The output end of the evaporator is connected to the input end of the compressor through a third pipe;

[0010] The second pipe has a heat exchange pipe section, and a covering portion is provided between the heat exchange pipe section and the third pipe to form a pipe-in-pipe structure.

[0011] Compared with the existing technology, the present invention sets a tube-in-tube structure of the second pipe and the third pipe, utilizes the heat absorption effect of the low-temperature and low-pressure gaseous refrigerant in the third pipe, and performs secondary condensation on the gas-liquid mixed refrigerant that is not completely condensed in the second pipe, effectively solving the problem of insufficient primary condensation in a high-temperature environment, ensuring that the refrigerant entering the evaporator is mainly liquid, and significantly improving the refrigeration effect.

[0012] In a preferred embodiment, the heat exchange section covers a portion of the third pipe.

[0013] In a preferred embodiment, the heat exchange pipe section is a pipe with a U-shaped structure.

[0014] In a preferred embodiment, the second pipe has a first capillary tube section, and the heat exchange tube section is connected to the output end of the condenser through the first capillary tube section.

[0015] In a preferred embodiment, the second pipe has a second capillary tube section, and the heat exchange tube section is connected to the input end of the evaporator via the second capillary tube section.

[0016] In a preferred embodiment, the second capillary tube segment has a spiral tube segment.

[0017] In a preferred embodiment, a filter is provided at the second capillary section.

[0018] In a preferred embodiment, the evaporator is located above the condenser.

[0019] In a preferred embodiment, the input end of the condenser is located at the upper part of the condenser; and the output end of the condenser is located at the bottom of the condenser.

[0020] In a preferred embodiment, the input end of the evaporator is located at the bottom of the evaporator; and the output end of the evaporator is located at the top of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 It is a three-dimensional diagram of the elevator air conditioner with secondary condensation function of the present invention.

[0023] Description of reference numerals:

[0024] 100 - compressor, 200 - condenser, 300 - evaporator, 400 - first pipeline, 500 - second pipeline, 510 - heat exchange pipe section, 520 - first capillary tube section, 530 - second capillary tube section, 531 - spiral pipe section, 600 - third pipeline. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] In order to better illustrate the present invention, the present invention is described in further detail below with reference to the accompanying drawings.

[0027] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0029] Combine Figure 1 As shown, the present invention discloses an elevator air conditioner with a secondary condensation function, comprising:

[0030] Compressor 100, condenser 200 and evaporator 300;

[0031] The output end of the compressor 100 is connected to the input end of the condenser through a first pipe 400;

[0032] The output end of the condenser is connected to the input end of the evaporator through a second pipe 500;

[0033] The output end of the evaporator is connected to the input end of the compressor 100 through a third pipe 600;

[0034] The second pipe 500 has a heat exchange pipe section 510 , and a covering portion is provided between the heat exchange pipe section 510 and the third pipe 600 to form a pipe-in-pipe structure.

[0035] Compared with the prior art, the present invention sets a tube-in-tube structure of the second pipe 500 and the third pipe 600, and utilizes the heat absorption effect of the low-temperature and low-pressure gaseous refrigerant in the third pipe 600 to perform secondary condensation on the gas-liquid mixed refrigerant that has not been completely condensed in the second pipe 500, so that the gas-liquid mixed refrigerant is converted into a high-pressure room-temperature liquid before entering the evaporator 300, effectively solving the problem of insufficient primary condensation in a high-temperature environment, ensuring that the refrigerant entering the evaporator 300 is mainly in liquid state, and significantly improving the cooling effect.

[0036] The refrigerant circulation process of the elevator air conditioner of the present invention is as follows:

[0037] The compressor 100 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas. Under the influence of the high-temperature working environment (43 to 45°C), the high-temperature, high-pressure gas enters the condenser 200 through the first pipe 400 and is condensed into a high-temperature, high-pressure gas-liquid mixture. When the high-temperature, high-pressure gas-liquid mixture flows through the second pipe 500, it is affected by the low temperature of the third pipe 600 and is condensed into a high-pressure, normal-temperature liquid. The high-pressure, normal-temperature liquid enters the evaporator 300 and becomes a low-temperature, low-pressure gas. The low-temperature, low-pressure gas enters the compressor 100 through the third pipe 600, forming a cycle.

[0038] In the present invention, the pressure of the low-temperature, low-pressure gaseous refrigerant is 8 to 10 kg, and the temperature is 25 to 35°C; the pressure of the high-pressure, room-temperature liquid is 35 to 40 kg, and the temperature is 50 to 60°C; the pressure of the high-temperature, high-pressure gas is 35 to 40 kg, and the temperature is 90 to 100°C; the pressure of the high-temperature, high-pressure gas-liquid mixture is 35 to 40 kg, and the temperature is about 55°C.

[0039] Furthermore, the heat exchange section 510 is partially coated around the third pipe 600. This partial coating design allows the coating ratio to be adjusted based on actual operating conditions (e.g., ambient temperature, cooling capacity requirements), flexibly adapting to high or normal temperature environments, ensuring that the refrigerant reaches an optimal degree of subcooling before entering the evaporator 300, and improving cooling efficiency.

[0040] Furthermore, the heat exchange pipe section 510 is a U-shaped pipe. The curved structure of the U-shaped pipe avoids the long-distance laying required by traditional straight pipe layouts, increases the flow path length of the refrigerant in the heat exchange section 510, and effectively increases the heat exchange area between the heat exchange pipe section 510 and the third pipe 600, allowing the high-temperature, high-pressure gas-liquid mixture to be fully converted into a high-pressure, room-temperature liquid.

[0041] Furthermore, the second pipe 500 has a first capillary section 520, and the heat exchange section 510 is connected to the output end of the condenser via the first capillary section 520. The capillary section acts as a throttling element, initially reducing the pressure of the high-temperature, high-pressure gas-liquid mixed refrigerant output by the condenser 200, lowering its pressure when it enters the heat exchange section 510, allowing the gas-liquid mixed refrigerant to be more easily cooled to a liquid state within the heat exchange section 510.

[0042] Furthermore, the second pipe 500 has a second capillary section 530, and the heat exchange pipe section 510 is connected to the input end of the evaporator via the second capillary section 530. The capillary section acts as a throttling element, throttling the refrigerant after secondary condensation, thereby reducing the pressure of the high-pressure, room-temperature liquid refrigerant and preventing incomplete evaporation of the refrigerant after entering the evaporator 300 due to excessive pressure.

[0043] Furthermore, the second capillary tube section 530 has a spiral tube section 531. The spiral structure increases the flow path length of the refrigerant in the capillary tube through the coiled design, providing sufficient length so that the pressure of the refrigerant gradually decreases during the process of flowing to the evaporator 300.

[0044] Furthermore, a filter is installed at the second capillary tube segment 530. Elevator air conditioners operate in a high-temperature, enclosed cabin environment for extended periods, and dust, metal shavings, or moisture may be mixed into the refrigerant. The filter effectively removes solid impurities and liquid moisture from the second capillary tube segment 530 through physical interception, preventing throttling failure or uneven flow due to blockage.

[0045] In one embodiment, the evaporator 300 is located above the condenser 200. This arrangement of the evaporator 300 and condenser 200 maximizes the vertical space at the top of the elevator car, reduces lateral space, and is suitable for the confined space at the top of a small elevator shaft. Condensate produced by the evaporator 300 during operation naturally drips onto the condenser 200 due to gravity, helping the condenser 200 dissipate heat.

[0046] Furthermore, the input end of the condenser is located at the top of the condenser 200, and the output end of the condenser is located at the bottom of the condenser 200. After entering from the top, the high-temperature and high-pressure gaseous refrigerant flows downward under the action of gravity. Inside the condenser 200, the condensed liquid refrigerant naturally gathers at the bottom due to gravity and is discharged. This prevents the liquid refrigerant from accumulating at the top, causing local overheating or uneven heat exchange, and ensures an efficient and stable condensation process.

[0047] Furthermore, the evaporator input end is located at the bottom of the evaporator 300, and the evaporator output end is located at the top of the evaporator 300. With the input end located at the bottom of the evaporator 300, liquid refrigerant enters at the lowest point and naturally spreads under the action of gravity, fully contacting the fins of the evaporator 300, resulting in a more uniform heat absorption and evaporation process. With the output end located at the top of the evaporator 300, the gaseous refrigerant evaporated from the liquid refrigerant is discharged first, leaving the liquid refrigerant at the bottom due to gravity. This prevents unevaporated droplets from entering the compressor 100 along with the gaseous refrigerant, thereby extending the life of the compressor 100.

[0048] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. An elevator air conditioner with secondary condensation function, characterized in that: include: compressor, condenser, and evaporator; The output end of the compressor is connected to the input end of the condenser through a first pipe; The output end of the condenser is connected to the input end of the evaporator through a second pipe; The output end of the evaporator is connected to the input end of the compressor through a third pipe; The second pipe has a heat exchange pipe section, and a covering portion is provided between the heat exchange pipe section and the third pipe to form a pipe-in-pipe structure.

2. The elevator air conditioner with secondary condensation function according to claim 1, characterized in that: The heat exchange section covers a portion of the third pipe.

3. The elevator air conditioner with secondary condensation function according to claim 2, characterized in that: The heat exchange pipe section is a pipe with a U-shaped structure.

4. The elevator air conditioner with secondary condensation function according to claim 2, characterized in that: The second channel has a first capillary section, The heat exchange tube section is connected to the output end of the condenser through the first capillary tube section.

5. The elevator air conditioner with secondary condensation function according to claim 2, characterized in that: The second channel has a second capillary section, The heat exchange tube section is connected to the input end of the evaporator through the second capillary tube section.

6. The elevator air conditioner with secondary condensation function according to claim 5, characterized in that: The second capillary tube segment has a spiral tube segment.

7. The elevator air conditioner with secondary condensation function according to claim 5, characterized in that: A filter is provided at the second capillary section.

8. The elevator air conditioner with secondary condensation function according to claim 1, characterized in that: The evaporator is located above the condenser.

9. The elevator air conditioner with secondary condensation function according to claim 1, characterized in that: The input end of the condenser is located at the upper part of the condenser; The output end of the condenser is located at the bottom of the condenser.

10. The elevator air conditioner with secondary condensation function according to claim 1, characterized in that: The input end of the evaporator is located at the bottom of the evaporator; The output end of the evaporator is located at the upper part of the evaporator.

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