CN217604408U

CN217604408U - Water chilling unit

Info

Publication number: CN217604408U
Application number: CN202221458397.5U
Authority: CN
Inventors: 袁杰; 金阿龙; 温素珍; 金贤松; 陈建汶; 谢毓豪; 毛君慧; 周德强; 刘斌斌; 戴陈渲; 麻林海; 高万成
Original assignee: Zhejiang Kingfit Environment Co ltd
Current assignee: Zhejiang Kingfit Environment Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-10-18
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to an air conditioning system field especially relates to a water chilling unit. A water chilling unit comprises a box body, and a compressor, a condenser, a throttling device, a heat exchanger and a water pump which are arranged in the box body; the heat exchanger comprises a shell with a medium cavity hermetically built inside and a vortex-shaped heat exchange core arranged in the medium cavity of the shell; a first medium channel is formed inside the spiral heat exchange core body, the spiral heat exchange core body is enclosed in a medium cavity of the shell to form a second medium channel, and the first medium channel and the second medium channel can exchange heat with each other; the compressor, the condenser, the throttling device and the first medium channel of the heat exchanger are connected end to form a closed circulating refrigerant loop; the water pump is communicated with the second medium channel of the heat exchanger to construct a cold water loop connected with an external heat source. The water chilling unit has the advantages of small and compact structure and high heat exchange efficiency.

Description

Water chilling unit

Technical Field

The utility model relates to an air conditioning system field especially relates to a cooling water set.

Background

At present, with the continuous improvement of the industrial level in China, in industrial production and manufacturing, particularly in precise production and manufacturing, constant-temperature treatment must be carried out on product production and manufacturing places and production and manufacturing equipment so as to ensure the quality of products. In isothermal processes, cooling is one of the very important process steps; at present, the widely adopted cooling equipment is an industrial water chilling unit for cooling the equipment.

The refrigeration industry is divided into an air-cooled water chilling unit and a water-cooled water chilling unit, wherein the air-cooled water chilling unit generally comprises an evaporator, a condenser, a compressor, a throttle expansion valve, a fan and other devices. During installation, the compressor, the condenser, the plate heat exchanger and other components are generally assembled and installed separately, for example, first, the compressor is installed at the bottom of the machine frame, then the condenser is installed in the machine frame, then the heat exchanger is installed inside the machine frame, and finally, the copper pipes and other components among the compressor, the condenser and the plate heat exchanger are welded together. And after the refrigeration system device is assembled, assembling the electronic control module.

The heat exchangers built in the existing water chilling unit generally adopt common heat exchangers such as a double-pipe heat exchanger and a plate heat exchanger, and occupy a large space. In addition, the water chilling unit also has the problem of unreasonable internal space arrangement, so that the existing water chilling unit is large in size, large in occupied space and not easy to arrange.

Disclosure of Invention

In order to solve the above problem, an object of the present invention is to provide a water chiller, which has the advantages of small and compact structure and high heat exchange efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a water chilling unit comprises a box body, and a compressor, a condenser, a throttling device, a heat exchanger and a water pump which are arranged in the box body; the method is characterized in that: the heat exchanger comprises a shell with a medium cavity hermetically built inside and a vortex-shaped heat exchange core arranged in the medium cavity of the shell; a first medium channel is formed inside the vortex-shaped heat exchange core body, the vortex-shaped heat exchange core body is enclosed in a medium cavity of the shell to form a second medium channel, and the first medium channel and the second medium channel can exchange heat with each other; the compressor, the condenser, the throttling device and the first medium channel of the heat exchanger are connected end to form a closed circulating refrigerant loop; the water pump is communicated with the second medium channel of the heat exchanger to construct a cold water loop connected with an external heat source.

The above technical scheme is adopted in the utility model, this technical scheme relates to a water chilling unit, and the first medium passageway end to end of compressor, condenser, throttling arrangement and heat exchanger in this water chilling unit constitutes closed endless refrigerant return circuit, and the heat exchanger is as the evaporimeter in this return circuit. In the operation process of the refrigerant loop, after the refrigerant is compressed by the compressor, high-temperature and high-pressure refrigerant gas flows into the condenser from the compressor, is condensed into high-temperature and high-pressure liquid in the condenser, then is introduced into the throttling device for throttling and depressurizing to become low-temperature and low-pressure gas-liquid mixture, enters the heat exchanger for exchanging heat with cooling water in the cold water loop, and returns to the compressor to complete a cycle. Meanwhile, the cold water loop is externally connected with an external heat source, the external heat source can be one or a group of equipment, the cold water loop takes a water pump as conveying power, and a second medium (generally cooling water) absorbs and takes away heat after flowing through the external heat source, so that the external heat source is cooled, and then flows back to the heat exchanger to exchange heat with a refrigerant; the refrigerant absorbs heat during heat exchange, and the cooling water releases heat during heat exchange.

Based on the working principle of the water chilling unit, the heat exchanger adopted by the water chilling unit is a vortex disc type heat exchanger, a vortex-shaped heat exchange core is arranged in the heat exchanger, on one hand, a first medium channel is built in the vortex-shaped heat exchange core, and on the other hand, a second medium channel is built in a medium cavity of the shell in an enclosing mode. Compared with the scheme of a sleeve heat exchanger or a plate heat exchanger adopted by the existing water chilling unit, the built-in vortex-shaped medium flow channel of the vortex-shaped disc heat exchanger of the scheme constructs a longer medium flow path with smaller occupied space, and particularly occupies smaller space in the axial direction; the flow of the medium in the heat exchange tube is increased, so that the heat exchange time is prolonged, and the heat exchange efficiency is improved.

The water chilling unit of this scheme has small and exquisite, the compactness of structure, the higher advantage of heat exchange efficiency.

Preferably, the water pump further comprises a water tank, the outlet end of the second medium channel is connected with the water inlet end of the water tank, and the water outlet end of the water tank is connected with the water inlet end of the water pump. In the technical scheme, the water tank is further arranged in the cold water loop, the water amount of the water tank in operation in the cold water loop is increased, and the problems of load fluctuation and frequent start and stop of the host caused by over-small system can be effectively solved.

In a further scheme, the water tank is arranged at the bottom of the box body, and the heat exchangers are stacked on the upper end surface of the water tank; and a second medium output pipe of the heat exchanger is positioned in the center of the shell and is communicated with the inner cavity of the water tank downwards. In this scheme stack the heat exchanger in the water tank upper end, make placing of heat exchanger and water tank more compact to can make the second medium output tube of heat exchanger directly let in the water tank, and need not to arrange the intercommunication pipeline between.

Preferably, the condenser and the compressor are arranged in the box body above the heat exchanger, the condenser is arranged on the side surface of the box body and at least covers the side walls of the two sides of the box body, and the compressor is positioned in the enclosed area of the condenser; the condenser is internally provided with a micro-channel for the refrigerant to flow through, and an air inlet communicated with the inner side and the outer side of the box body is formed in the condenser. In this scheme, condenser and compressor set up in the box above the heat exchanger to the condenser adopts air-cooled condenser, and the both sides lateral wall of box is covered at least to the condenser, and the condenser in this scheme can directly regard as the air inlet grid on the box lateral wall, also can arrange in box lateral wall air intake inboard, because of the condenser sets up on the box side, occupation space is less. Meanwhile, the compressor can be placed above the heat exchanger in the area enclosed by the condenser, and based on the arrangement mode, the overall occupied space of the water chilling unit is greatly reduced.

Furthermore, a micro-channel arranged in the condenser is used for a refrigerant to flow through, and the micro-channel can improve the heat exchange efficiency of the refrigerant and air.

Preferably, a dry filter is further provided in the refrigerant circuit, the dry filter is provided upstream or downstream of the throttle device, and the dry filter performs a function of filtering impurities.

Drawings

Fig. 1 is a working principle diagram of a water chilling unit.

Fig. 2 is a schematic structural diagram of a water chiller.

Fig. 3 is a schematic structural diagram of the water chilling unit in a perspective state of the heat exchanger.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 3, the present embodiment relates to a water chiller, which includes a tank, and a compressor 1, a condenser 2, a drying filter 3, a throttling device 4, a heat exchanger 5, and a water pump 6, which are disposed in the tank. The heat exchanger 5 includes a housing 51 having a medium chamber hermetically formed therein, and a spiral heat exchange core 52 disposed in the medium chamber of the housing 51. A first medium channel is formed inside the spiral heat exchange core 52, the spiral heat exchange core 52 encloses a medium chamber of the shell 51 to form a second medium channel, and the first medium channel and the second medium channel can exchange heat with each other. The first medium channels of the compressor 1, the condenser 2, the drying filter 3, the throttling device 4 and the heat exchanger 5 are connected end to form a closed-cycle refrigerant loop. The water pump 6 is communicated with the second medium channel of the heat exchanger 5 to construct a cold water loop connected with an external heat source 7. The dry filter 3 in this embodiment is disposed upstream or downstream of the throttle device 4, and the dry filter 3 functions to filter impurities.

A compressor 1, a condenser 2, a drying filter 3, a throttling device 4 and a first medium channel of a heat exchanger 5 in the water chilling unit are connected end to form a closed-cycle refrigerant loop, and the heat exchanger 5 serves as an evaporator in the loop. In the operation process of the refrigerant loop, after a refrigerant is compressed by the compressor 1, high-temperature and high-pressure refrigerant gas flows into the condenser 2 from the compressor 1, is condensed into high-temperature and high-pressure liquid in the condenser 2, then is introduced into the throttling device 4 to be throttled and decompressed into a low-temperature and low-pressure gas-liquid mixture, enters the heat exchanger 5 to exchange heat with cooling water in the cold water loop, and returns to the compressor 1 to complete a cycle. Meanwhile, the cold water loop is externally connected with an external heat source 7, the external heat source 7 can be one or a group of equipment, the cold water loop uses a water pump 6 as conveying power, a second medium (generally cooling water) absorbs and takes away heat after flowing through the external heat source 7 to cool the external heat source 7, the temperature of the inside of the external heating body 7 can be generally reduced by 5-20 ℃, and then the cold water returns to the heat exchanger 5 to exchange heat with a refrigerant. The refrigerant absorbs heat in the heat exchange process, and the cooling water releases heat in the heat exchange process.

Based on the working principle of the water chilling unit, the heat exchanger 5 adopted by the water chilling unit is a scroll-type disc heat exchanger 5, a scroll-type heat exchange core 52 is arranged in the heat exchanger 5, on one hand, a first medium channel is formed inside the scroll-type heat exchange core 52, and on the other hand, a second medium channel is formed by enclosing the scroll-type heat exchange core 52 in a medium cavity of the shell 51. Compared with the scheme of a sleeve pipe heat exchanger 5 or a plate heat exchanger 5 adopted by the existing water chilling unit, the spiral medium flow passage built in the spiral disc type heat exchanger 5 of the scheme has the advantages that a longer medium flow path is constructed in a smaller occupied space, and particularly, the occupied space in the axial direction is smaller. So increase the flow of medium at the heat exchange tube to extension heat transfer time promotes heat exchange efficiency.

In the solutions shown in fig. 2 and 3, the water chilling unit further includes a water tank 8, the outlet end of the second medium channel is connected to the water inlet end of the water tank 8, and the water outlet end of the water tank 8 is connected to the water inlet end of the water pump 6. In the technical scheme, the water tank 8 is further arranged in the cold water loop, the water tank 8 increases the running water amount in the cold water loop, and the problems of load fluctuation and frequent start and stop of a host caused by too small system can be effectively solved. In a further scheme, the water tank 8 is arranged at the bottom of the tank body, and the heat exchanger 5 is arranged on the upper end face of the water tank 8 in a stacked manner. The second medium output pipe of the heat exchanger 5 is located at the center of the shell 51 and is communicated with the inner cavity of the water tank 8 downwards. In the scheme, the heat exchanger 5 is stacked at the upper end of the water tank 8, so that the heat exchanger 5 and the water tank 8 are placed more compactly, and the second medium output pipe of the heat exchanger 5 can directly lead into the water tank 8 without arranging a communicating pipeline between the heat exchanger and the water tank.

As shown in the figure, the condenser 2 and the compressor 1 are arranged in a box body above the heat exchanger 5, the condenser 2 is arranged on the side surface of the box body and at least covers the side walls of two sides of the box body, and the compressor 1 is positioned in the enclosed area of the condenser 2. The condenser 2 is internally provided with a micro-channel for the refrigerant to flow through, and the condenser 2 is provided with an air inlet communicated with the inner side and the outer side of the box body. In this scheme, condenser 2 and compressor 1 set up in the box above heat exchanger 5 to condenser 2 adopts air-cooled condenser 2, and condenser 2 covers the both sides lateral wall of box at least, and condenser 2 in this scheme can directly regard as the air inlet grid on the box lateral wall, also can arrange in box lateral wall air intake inboard, because of condenser 2 sets up on the box side, occupation space is less. Meanwhile, the compressor 1 can be placed above the heat exchanger 5 in the area enclosed by the condenser 2, and based on the arrangement mode, the whole occupied space of the water chilling unit is greatly reduced.

In this scheme, the micro-channel that condenser 2 was built-in supplies refrigerant to flow through, and the micro-channel can promote the heat exchange efficiency of refrigerant and air.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. A water chilling unit comprises a box body, and a compressor (1), a condenser (2), a throttling device (4), a heat exchanger (5) and a water pump (6) which are arranged in the box body; the method is characterized in that: the heat exchanger (5) comprises a shell (51) with a medium cavity hermetically built inside and a spiral heat exchange core (52) arranged in the medium cavity of the shell (51); a first medium channel is formed inside the spiral heat exchange core (52), the spiral heat exchange core (52) is enclosed in a medium cavity of the shell (51) to form a second medium channel, and the first medium channel and the second medium channel can exchange heat with each other; the first medium channels of the compressor (1), the condenser (2), the throttling device (4) and the heat exchanger (5) are connected end to form a closed circulating refrigerant loop; the water pump (6) is communicated with a second medium channel of the heat exchanger (5) to construct a cold water loop connected with an external heat source (7).

2. The water chiller according to claim 1 wherein: the water pump further comprises a water tank (8), the outlet end of the second medium channel is connected with the water inlet end of the water tank (8), and the water outlet end of the water tank (8) is connected with the water inlet end of the water pump (6).

3. The water chiller according to claim 2 wherein: the water tank (8) is arranged at the bottom of the box body, and the heat exchanger (5) is stacked on the upper end face of the water tank (8); and a second medium output pipe of the heat exchanger (5) is positioned at the center of the shell (51) and is downwards communicated with the inner cavity of the water tank (8).

4. The water chiller according to claim 3 wherein: the condenser (2) and the compressor (1) are arranged in the box body above the heat exchanger (5), the condenser (2) is arranged on the side surface of the box body and at least covers the side walls of two sides of the box body, and the compressor (1) is positioned in the enclosed area of the condenser (2); the condenser (2) is internally provided with a micro-channel for the flowing of a refrigerant, and the condenser (2) is provided with an air inlet communicated with the inner side and the outer side of the box body.

5. The water chiller according to claim 1 wherein: and a drying filter (3) is also arranged in the refrigerant loop, and the drying filter (3) is arranged at the upstream or the downstream of the throttling device (4).