WO2024092919A1 - Thin and lightweight air-conditioning unit - Google Patents

Abstract

Provided in the present invention is a thin and lightweight air-conditioning unit. The thin and lightweight air-conditioning unit comprises a compressor, a condenser, an electronic expansion valve and an evaporator, which are sequentially connected to each other to form a refrigeration cycle loop. A condensation fan for exchanging heat with the outdoors is arranged on the condenser, and a blower for supplying air to the indoors is arranged on the evaporator. A microchannel heat exchanger is used inside the condenser, and the compressor is a variable-frequency compressor. In the thin and lightweight air-conditioning unit provided in the present invention, since the interior of the condenser is designed to be provided with the microchannel heat exchanger, the spatial size of the condenser is more compact and thus space is saved, such that the lightweight design can be further achieved on the basis of satisfying the refrigeration and heating requirements of a vehicle.

Description

A thin and lightweight air conditioning unit

This application claims priority to the domestic application filed with the China Patent Office on October 31, 2022, with application number 202211343800.4 and invention name “A thin and lightweight air-conditioning unit”, and the domestic application filed with the China Patent Office on October 31, 2022, with application number 202222888761.8 and invention name “A thin and lightweight air-conditioning unit”, all contents of which are incorporated by reference in this application.

Technical Field

The invention belongs to the technical field of train air conditioning units, and in particular relates to a thin and lightweight air conditioning unit.

Background technique

The EMU air conditioning unit is responsible for maintaining the comfort of the interior environment, realizing functions such as cooling, heating, ventilation, and air cleaning, which greatly affects the passenger experience and comfort. Existing EMUs use unit-type air conditioning units installed in the roof space. However, some rail vehicles are limited by vehicle space and tunnel limits, while also meeting the vehicle cooling capacity requirements. Therefore, the use of thinner air conditioning units has become popular.

In the process of high-speed railways, the lightweight design of EMUs has positive significance in reducing train drag, improving operational stability, saving energy and reducing consumption, protecting the environment, and reducing the maintenance costs of routes. The top-level demand for lightweighting of the entire vehicle is broken down into the air-conditioning system, and the air-conditioning unit, as the key equipment of the air-conditioning system, occupies a large proportion of the weight, and the lightweight potential needs to be explored.

Therefore, how to provide a thin and lightweight air conditioning unit is a problem that needs to be solved urgently by those skilled in the art.

Summary of the invention

The object of the present invention is to provide a thin and lightweight air conditioning unit which adopts a lightweight design while meeting the cooling and heating requirements of a vehicle.

In order to solve the above technical problems, the present invention provides a thin and lightweight air conditioning unit, comprising a refrigeration cycle formed by a compressor, a condenser, an electronic expansion valve and an evaporator connected in sequence, wherein the condenser is provided with a condensing fan for exchanging heat with the outside, and the evaporator is provided with a blower for supplying air to the room;

Wherein, a microchannel heat exchanger is used inside the condenser, and the compressor is a variable frequency compressor.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the microchannel heat exchanger of the condenser is a microchannel heat exchanger made of all-aluminum material.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the heat exchange surface of the microchannel heat exchanger is provided with an anti-corrosion coating.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the compressor, condenser, electronic expansion valve, evaporator, condensing fan and air supply fan are integrated into one structure.

Optionally, the above-mentioned thin and lightweight air-conditioning unit further includes a casing and a partition vertically arranged in the casing, the partition divides the interior of the casing into two left and right parts, the compressor, the condenser and the fan are arranged on one side of the partition, and the electronic expansion valve, the evaporator and the blower are arranged on the other side of the partition.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the number of the condenser, the condensing fan, the electronic expansion valve and the air supply fan are all multiple.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the compressor is arranged in the middle of the condenser, and the air blower is arranged in the middle of the evaporator.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, the compressor and the condensing fan are arranged side by side, and the air supply fan and the electronic expansion valve are arranged side by side.

Optionally, in the above-mentioned thin and lightweight air-conditioning unit, at least one of the gas circuit solenoid valve, the liquid circuit solenoid valve, the antifreeze switch, the filter pressure reducing valve and the flow control valve is eliminated.

The present invention provides a thin and lightweight air conditioning unit, which has the following beneficial effects:

By designing the interior of the condenser as a microchannel heat exchanger, its spatial dimensions are made more compact and space-saving, thereby further achieving a lightweight design while meeting the vehicle's cooling and heating needs.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a schematic structural diagram of a thin and lightweight air-conditioning unit provided by an embodiment of the present invention.

In the above picture:

1- compressor; 2- condenser; 3- condensing fan; 4- electronic expansion valve; 5- evaporator; 6- blower.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the description of the present invention, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

The core of the present invention is to provide a thin and lightweight air-conditioning unit, which adopts a lightweight design on the basis of meeting the cooling and heating needs of the vehicle.

In order to enable those skilled in the art to better understand the technical solution provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Specifically, please refer to FIG. 1 , which is a schematic structural diagram of a thin and lightweight air-conditioning unit provided by an embodiment of the present invention.

The present invention provides a thin and lightweight air conditioning unit, comprising a refrigeration cycle formed by a compressor 1, a condenser 2, an electronic expansion valve 4 and an evaporator 5 connected in sequence. The condenser 2 is provided with a condensing fan 3 for exchanging heat with the outside, and the evaporator 5 is provided with a blower 6 for supplying air to the room.

The interior of the condenser 2 uses a microchannel heat exchanger, and the compressor 1 is a variable frequency compressor 1 .

Its working principle is: compressor 1 is used to compress refrigerant, condenser 2 is used to cool high-temperature and high-pressure gas compressed by compressor 1, condensing fan 3 is used to dissipate heat from condenser 2, evaporator 5 is used to absorb heat, and blower 6 is used to dissipate heat from evaporator 5.

The variable frequency compressor 1 compresses the refrigerant into high-temperature and high-pressure refrigerant vapor, which enters the refrigerant channel of the air-cooled condenser 2, and is forced to exchange heat with the outside air through the condensing fan 3. The refrigerant condenses into a liquid at room temperature and high pressure, enters the electronic expansion valve 4 for throttling and pressure reduction, and becomes a low-temperature and low-pressure gas-liquid mixed refrigerant, and then enters the evaporator 5, absorbs the heat of the air flowing through the evaporator 5, evaporates into low-temperature and low-pressure steam, and is then sucked in and compressed by the compressor 1, completing a closed refrigeration cycle. The compressor 1 works continuously to achieve a continuous refrigeration effect. The blower 6 sends the cold air cooled and dehumidified by the evaporator 5 into the air duct to the passenger compartment to bear the heat and humidity load, creating a healthy and comfortable passenger compartment environment.

The thin and lightweight air-conditioning unit provided by the present invention makes the interior of the condenser 2 into a microchannel heat exchanger, so that its spatial dimensions are more compact and space-saving, thereby further realizing a lightweight design on the basis of meeting the vehicle's cooling and heating needs.

In a specific embodiment, the microchannel heat exchanger of the condenser 2 is a microchannel heat exchanger made of all-aluminum. Furthermore, the heat exchange surface of the microchannel heat exchanger is provided with an anti-corrosion coating. The condenser 2 of the air-conditioning unit adopts a microchannel heat exchanger made of all-aluminum and anti-corrosion coating. Compared with the traditional copper tube and aluminum fin, the weight is reduced by about 60%, the refrigerant charge is reduced by 40%, and the wind side resistance is reduced by 45%, which is conducive to reducing weight and noise, and improving the energy efficiency of the whole machine. At the same time, the space size of the microchannel heat exchanger is more compact, and the thickness is reduced by about 70% compared with the traditional 7mm copper tube and aluminum fin heat exchanger, which saves more space.

In a specific embodiment, the compressor 1, the condenser 2, the electronic expansion valve 4, the evaporator 5, the condensing fan 3 and the air supply fan 6 are an integrated structure.

Specifically, the present invention also includes a casing and a partition vertically arranged in the casing, the partition divides the inside of the casing into two parts, a compressor 1, a condenser 2 and a fan are arranged on one side of the partition, and an electronic expansion valve 4, an evaporator 5 and a blower 6 are arranged on the other side of the partition. The partition is used to carry various components of the air conditioning unit. The compressor 1, the condenser 2, the condensing fan 3, the evaporator 5, the blower 6 and the electronic expansion valve 4 are all assembled on the partition, which improves the assembly production efficiency.

There are multiple condensers 2, condensing fans 3, electronic expansion valves 4 and blowers 6. The condensers 2 and condensing fans 3 correspond to each other. The electronic expansion valves 4 and blowers 6 correspond to each other.

In order to reasonably utilize the space, the compressor 1 is arranged in the middle of the condenser 2, and the blower 6 is arranged in the middle of the evaporator 5. The compressor 1 and the condensing blower 3 are arranged side by side, and the blower 6 and the electronic expansion valve 4 are arranged side by side.

In order to optimize the functions of the air-conditioning unit, redundant functions such as the gas circuit solenoid valve, liquid circuit solenoid valve, and antifreeze switch are eliminated, the refrigeration pipeline design is optimized, the filter pressure reducing valve, flow control valve, etc. are eliminated, and the air-conditioning unit adopts an integrated control method to reduce the use of electrical connectors. While providing the same cooling capacity, the air-conditioning unit can be reduced by 24% in weight compared to traditional units and save 22% in height space.

The beneficial effects brought by the technical solution provided by the present invention are:

Develop a thin and lightweight unit to meet the cooling and heating needs of the vehicle, ensure that the air-conditioning unit installed on the roof can meet the line limit, maximize the height space in the vehicle, and take lightweight design measures to build a lightweight, efficient and energy-saving air-conditioning system.

By selecting lightweight components and using lighter variable frequency compressors 1, condensing fans 3, evaporating fans, heat exchangers and other components, the air conditioning performance is effectively improved while reducing weight and noise. The internal structure of the air conditioning unit is optimized, the refrigeration pipeline path is optimized, and redundant pipelines and components are eliminated. The size of the air conditioning unit is optimized by selecting more compact components such as heat exchangers, optimizing the unit space layout, and shell design, etc., to further reduce the height of the unit.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims (9)

1. A thin and lightweight air conditioning unit, characterized in that it comprises a refrigeration cycle formed by a compressor, a condenser, an electronic expansion valve and an evaporator connected in sequence, the condenser is provided with a condensing fan for exchanging heat with the outside, and the evaporator is provided with a blower for supplying air to the room;

   Wherein, a microchannel heat exchanger is used inside the condenser, and the compressor is a variable frequency compressor.
2. The thin and lightweight air-conditioning unit according to claim 1 is characterized in that the microchannel heat exchanger of the condenser is a microchannel heat exchanger made of all-aluminum material.
3. The thin and lightweight air-conditioning unit according to claim 2 is characterized in that the heat exchange surface of the microchannel heat exchanger is provided with an anti-corrosion coating.
4. The thin and lightweight air-conditioning unit according to claim 1 is characterized in that the compressor, condenser, electronic expansion valve, evaporator, condensing fan and air supply fan are integrated into one structure.
5. According to claim 4, the thin and lightweight air-conditioning unit is characterized in that it also includes a casing and a partition vertically arranged in the casing, the partition divides the interior of the casing into two left and right parts, the compressor, the condenser and the fan are arranged on one side of the partition, and the electronic expansion valve, the evaporator and the blower are arranged on the other side of the partition.
6. The thin and lightweight air-conditioning unit according to claim 5 is characterized in that the number of the condenser, the condensing fan, the electronic expansion valve and the air supply fan are all multiple.
7. The thin and lightweight air conditioning unit according to claim 6 is characterized in that the compressor is arranged in the middle of the condenser, and the air blower is arranged in the middle of the evaporator.
8. The thin and lightweight air conditioning unit according to claim 6 is characterized in that the compressor and the condensing fan are arranged side by side, and the air supply fan and the electronic expansion valve are arranged side by side.
9. The thin and lightweight air conditioning unit according to claim 1 is characterized in that at least one of the gas circuit solenoid valve, the liquid circuit solenoid valve, the antifreeze switch, the filter pressure reducing valve and the flow control valve is eliminated.

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