CN222562769U

CN222562769U - Chiller

Info

Publication number: CN222562769U
Application number: CN202420384286.7U
Authority: CN
Inventors: 杨挺然; 王先锋; 芦文杰
Original assignee: Suzhou Envicool Temperature Control Technology Co ltd
Current assignee: Suzhou Envicool Temperature Control Technology Co ltd
Priority date: 2024-02-29
Filing date: 2024-02-29
Publication date: 2025-03-04
Anticipated expiration: 2034-02-28

Abstract

The utility model provides a chiller, and relates to the technical field of chillers. The chiller includes a chiller, wherein a first cover is provided at the first end of the chiller, and a second cover is provided at the second end of the chiller; at least one air inlet is provided on the first cover, and at least one air outlet is provided on the second cover; the chiller has an installation cavity, and a dry cooler and a condenser are arranged side by side in sequence along a first direction in the installation cavity. The utility model can make full use of the natural environment cold source through the dry cooler to reduce the energy consumption of the unit; the dry cooler and the condenser can use the same fan assembly to reduce the space occupied by the chiller; the airflow cavity prevents heat radiation from being generated between the dry cooler and the condenser, and the airflow cavity can also comb the airflow after heat exchange from the dry cooler, reduce the wind resistance of the condenser, and improve the heat exchange efficiency of the condenser.

Description

Water chilling unit

Technical Field

The utility model relates to the technical field of water chilling units, in particular to a water chilling unit.

Background

Along with the high importance of the country to the energy storage industry, various patches are continuously added, the cost of an energy storage machine is reduced, and the energy storage industry is developed at a high speed by combining the influence of factors such as peak Gu Jiacha and the like.

Long life, high integration and high density have become the development trend of energy storage products, thereby bringing about the improvement of the internal heat density of the energy storage products.

The temperature of the battery product during operation affects the performance and the service life of the battery to a great extent, so the energy storage industry pays great attention to the capacity and the power consumption of the refrigeration equipment.

In the process of realizing the utility model, the inventor finds that at least the following problems exist in the prior art, namely, in the prior art, a water chilling unit is generally arranged in an energy storage cabinet, and power consumption is provided by energy storage equipment, so that the technical problems of how to realize high efficiency, energy conservation and small space occupation ratio of the water chilling unit are to be solved in the art.

Disclosure of utility model

The utility model aims to provide a water chilling unit so as to achieve the technical problems of high efficiency, energy saving and small space occupation ratio of the water chilling unit.

The utility model provides a water chilling unit, which comprises a water chilling unit, wherein a first cover body is arranged at a first end of the water chilling unit, and a second cover body is arranged at a second end of the water chilling unit;

The water chiller comprises a first cover body, a second cover body, a water inlet, a water outlet, a water inlet and a water outlet, wherein the first cover body is provided with at least one air inlet, and the second cover body is provided with at least one air outlet;

An air inlet cavity is formed between the first cover body and the dry cooler, and an airflow cavity is formed between the dry cooler and the condenser;

The first direction is the direction from the first cover body to the second cover body.

The air flow enters from the air inlet and sequentially passes through the dry cooler and the condenser, the dry cooler and the condenser are arranged in the water chiller in sequence, and are arranged side by side in the first direction, so that the natural environment cold source can be fully utilized to provide cold energy by heat exchange between the dry cooler and the natural environment air flow, the energy consumption of the water chiller is reduced, the same fan assembly can be adopted for the dry cooler and the condenser, so that the space occupation ratio of the water chiller is reduced, in addition, an air flow cavity is formed between the dry cooler and the condenser, the air flow can exchange heat between the dry cooler and the condenser independently, heat radiation is not generated between the air flow and the air flow does not influence the heat exchange effect, in addition, the formed air flow cavity can comb the air flow after the heat exchange of the dry cooler, the turbulence degree of the air flow is reduced, the air flow can flow to the condenser more uniformly, the air resistance is reduced, and the heat exchange efficiency is improved.

In an alternative embodiment, both the dry cooler and the condenser are V-shaped;

The V-shaped tips of the dry cooler and the condenser face the first cover body, and the V-shaped openings of the dry cooler and the condenser face the second cover body.

In an alternative embodiment, the V-shaped setting angles of the dry cooler and the condenser are the same, the dry cooler and the condenser are arranged in a superposed mode, and the distance between the dry cooler and the condenser is set to be 6-15mm.

In an alternative embodiment, a plate heat exchanger is arranged in the air inlet cavity, and the plate heat exchanger is arranged close to the tip of the dry cooler.

In an alternative embodiment, a third cover body and a fourth cover body are respectively arranged at two sides of the first direction of the water chilling unit, and two ends of the third cover body and the fourth cover body in the first direction are respectively connected with the first cover body and the second cover body;

The first cover body, the second cover body, the third cover body and the fourth cover body form a frame, an upper end cover is arranged at the upper end of the frame, and a lower bottom cover is arranged at the lower end of the frame.

In an alternative embodiment, an electric control assembly is arranged in the air inlet cavity;

The electric control assembly is arranged on the inner side of the third cover body in a sliding mode, an assembly hole is formed in the first cover body, and one end of the electric control assembly is clamped outside the first cover body and connected with the first cover body.

In an optional embodiment, the air inlet cavity is further internally provided with a compressor, a secondary refrigerant liquid pump, a heater and an expansion tank, wherein the compressor, the secondary refrigerant liquid pump, the heater and the expansion tank are all installed horizontally, the compressor is close to the third cover body, the heater is close to the fourth cover body, the secondary refrigerant liquid pump is close to the plate heat exchanger, and the expansion tank is arranged on the inner side of the fourth cover body and close to the first cover body.

In an alternative embodiment, the first cover body is provided with a secondary refrigerant liquid inlet and a secondary refrigerant liquid supply port;

a first connecting pipeline is arranged between the plate heat exchanger and the secondary refrigerant liquid inlet, and a second connecting pipeline is arranged between the secondary refrigerant liquid inlet and the plate heat exchanger;

the dry cooler is connected with the first connecting pipeline through a third connecting pipeline, and the dry cooler is connected with the second connecting pipeline through a fourth connecting pipeline;

The heater is arranged on the second connecting pipeline, and the electromagnetic two-way valve is arranged on the third connecting pipeline.

In an alternative embodiment, one end of the condenser is connected with one end of the plate heat exchanger through a fifth connecting pipeline, and the other end of the condenser is connected with the other end of the plate heat exchanger through a sixth connecting pipeline;

The fifth connecting pipeline is provided with a compressor, and the sixth connecting pipeline is provided with an electronic expansion valve.

In an alternative embodiment, a filter screen is arranged at the air inlet;

The fan cavity is internally provided with a fan mounting plate, at least one heat dissipation fan is arranged on the fan mounting plate, and each heat dissipation fan corresponds to one air outlet.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a water chiller provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of another angle of the chiller shown in FIG. 1;

Fig. 3 is a schematic diagram of the chiller shown in fig. 1.

The icons are 100-fan mounting plates, 200-cooling fans, 300-dry coolers, 400-condensers, 500-compressors, 600-electronic expansion valves, 700-coolant liquid pumps, 800-coolant liquid inlets, 900-coolant liquid inlets, 110-plate heat exchangers, 120-electronic control components, 130-heaters, 140-filter screens, 150-first covers, 160-second covers, 170-third covers, 180-fourth covers, 190-expansion tanks, 210-lower covers, 220-electromagnetic two-way valves, 230-first connecting pipelines, 240-second connecting pipelines, 250-third connecting pipelines, 260-fourth connecting pipelines, 270-fifth connecting pipelines and 280-sixth connecting pipelines.

Detailed Description

The terms "first," "second," "third," and the like are used merely for distinguishing between descriptions and not for indicating a sequence number, nor are they to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "inner", "outer", "left", "right", "upper", "lower", etc., are based on directions or positional relationships shown in the drawings, or directions or positional relationships conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or communicate between the interior of two elements.

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings.

Examples

Referring to fig. 1 and 2, the present utility model provides a water chiller, including a water chiller, a first cover 150 is disposed at a first end of the water chiller, and a second cover 160 is disposed at a second end of the water chiller;

the water chiller comprises a mounting cavity, wherein a drier-cooler 300 and a condenser 400 which are arranged side by side are sequentially arranged in the mounting cavity along a first direction;

An air inlet cavity is formed between the first cover body 150 and the dry cooler 300, and an air flow cavity is formed between the dry cooler 300 and the condenser 400, and a fan cavity is formed between the condenser 400 and the second cover body 160;

The first direction is a direction from the first cover 150 to the second cover 160.

The condenser 400 and the dry cooler 300 are arranged in the water chilling unit, the condenser 400 utilizes a mechanical loop to refrigerate, the dry cooler 300 utilizes an environment natural cold source to refrigerate, and when the ambient temperature of the water chilling unit is lower, air flow with lower ambient temperature is utilized to exchange heat with the dry cooler 300, thereby realizing air-cooled heat exchange and realizing refrigeration by utilizing the environment natural cold source.

When the water chiller is assembled into the energy storage battery compartment, the air inlet and the air outlet are communicated with the outside, air flow can enter the installation cavity from the air inlet, and the air flow sequentially passes through the dry cooler 300 and the condenser 400, wherein a group of heat dissipation fans 200 can be adopted to cool the dry cooler 300 and the condenser 400 at the same time, when the environment temperature of the dry cooler 300 is higher, the dry cooler 300 does not work, the heat dissipation fans 200 only dissipate heat of the condenser 400, and when the dry cooler 300 and the condenser 400 work at the same time, the temperature of the refrigerating medium in the dry cooler 300 is far lower than that of the refrigerating medium in the condenser 400, so that the cold air firstly passes through the dry cooler 300 and then passes through the condenser 400 to dissipate heat, and the heat dissipation fans 200 can simultaneously dissipate heat of the dry cooler 300 and the condenser 400, and the energy consumption of the machine set is reduced at the same time.

And form the air current cavity between condenser 400 and the dry cooler 300 for the air current can mutually independent carry out the heat transfer between dry cooler 300 and condenser 400, can not produce the heat radiation and influence the heat transfer effect each other, in addition, the air current cavity that forms can also comb the air current after the heat transfer of dry cooler 300, reduces the turbulent degree of air current, can be comparatively even flow direction condenser 400, thereby reduces the windage of condenser 400, improves the heat transfer efficiency of condenser 400.

Referring to fig. 1, in an alternative embodiment, the dry cooler 300 and the condenser 400 are both V-shaped;

the tips of the V-shapes of the dry cooler 300 and the condenser 400 face the first cover 150, and the V-shapes of the dry cooler 300 and the condenser 400 face the second cover 160.

The air inlet areas of the dry cooler 300 and the condenser 400 can be increased, so that the heat exchange efficiency is improved.

In an alternative embodiment, the V-shaped setting angles of the dry cooler 300 and the condenser 400 are the same, and the two are arranged in a stacked manner, so, because the two are both arranged in the V-shaped with the same angle, when the two are arranged in a stacked manner, the occupied space of the dry cooler 300 and the condenser 400 in the water chiller is very small, so that the heat exchange efficiency is improved, and meanwhile, the volume of the chiller is reduced.

In addition, the distance between the dry cooler 300 and the condenser 400 is set to be 6-15mm, preferably, the distance between the dry cooler 300 and the condenser 400 is set to be 10mm, the distance between the dry cooler 300 and the condenser 400 forms the airflow cavity, and the distance between the dry cooler 300 and the condenser 400 is minimized on the premise that the airflow cavity is satisfied to comb airflows and the dry cooler 300 and the condenser 400 cannot generate heat radiation mutually, so that the occupied space of the dry cooler 300 and the condenser 400 in a water chiller set is optimized.

In an alternative embodiment, a plate heat exchanger 110 is arranged in the air inlet chamber, the plate heat exchanger 110 being arranged near the tip of the dry cooler 300.

Because the V heat exchanger is formed by combining two heat exchangers, the air intake of the tip part of the V heat exchanger is the smallest, and the heat exchange efficiency is the worst, so that the plate heat exchanger 110 with higher height is placed at the tip part of the dry cooler 300, and the influence of the plate heat exchanger 110 on the air intake of the dry cooler 300 is the smallest, so that the heat exchange efficiency of the dry cooler 300 is not affected.

Referring to fig. 1 and 2 (hiding the upper end cover), in an alternative embodiment, a third cover 170 and a fourth cover 180 are respectively disposed at two sides of the first direction of the water chiller, and two ends of the third cover 170 and the fourth cover 180 in the first direction are respectively connected with the first cover 150 and the second cover 160;

The first cover 150, the second cover 160, the third cover 170, and the fourth cover 180 form a frame, an upper end cover is provided at an upper end of the frame, and a lower bottom cover 210 is provided at a lower end of the frame.

The general plate heat exchanger 110, the coolant pump 700, the compressor 500, and the electronic expansion valve 600 are all disposed on the lower bottom cover 210, the first cover 150, the second cover 160, the third cover 170, and the fourth cover 180 are disposed along the circumferential side of the lower bottom cover 210, and the upper end cover is disposed opposite to the lower bottom cover 210, so that the water chiller forms a rectangular frame.

In an alternative embodiment, an electric control component 120 is arranged in the air inlet cavity;

The electronic control assembly 120 is slidably disposed inside the third cover 170, and the first cover 150 is provided with an assembly hole, and one end of the electronic control assembly 120 is clamped outside the first cover 150 and is connected to the first cover 150.

The electric control assembly 120 is generally fixed with the outside of the first cover 150 by adopting screws, when the electric control assembly 120 needs to be maintained, the electric control assembly 120 is pulled out of the assembly hole, so that the electric control assembly 120 is convenient to maintain, the maintenance efficiency is improved, and compared with the prior art, the upper end cover needs to be opened, and the maintenance difficulty is reduced.

In addition, the electronic control assembly 120 is disposed inside the third cover 170 and connected to the first cover 150, so that the electronic control assembly 120 avoids the airflow path from the air inlet to the dry cooler 300 as much as possible, thereby avoiding the influence on the heat exchange efficiency of the dry cooler 300 and the condenser 400 due to the wind shielding of the airflow path.

In an alternative embodiment, a compressor 500, a coolant pump 700, a heater 130 and an expansion tank 190 are further disposed in the air intake cavity, wherein the compressor 500, the coolant pump 700, the heater 130 and the expansion tank 190 are all installed horizontally, the compressor 500 is disposed close to the third cover 170, the heater 130 is disposed close to the fourth cover 180, the coolant pump 700 is disposed close to the plate heat exchanger 110, and the expansion tank 190 is disposed inside the fourth cover 180 and close to the first cover 150.

In the above arrangement, it can be seen that the main parts are disposed on two sides of the plate heat exchanger 110, so as to avoid the wind shielding of the air flow path from the air inlet to the dry cooler 300 as much as possible, and improve the heat exchange efficiency.

Referring to fig. 2 and 3, in an alternative embodiment, a coolant feed 800 and a coolant feed 900 are provided on the first cover 150;

A first connecting pipeline 230 is arranged between the plate heat exchanger 110 and the secondary refrigerant liquid inlet 800, and a second connecting pipeline 240 is arranged between the secondary refrigerant liquid inlet 900 and the plate heat exchanger 110;

The dry cooler 300 is connected with the first connecting pipeline 230 through a third connecting pipeline 250, and the dry cooler 300 is connected with the second connecting pipeline 240 through a fourth connecting pipeline 260;

The heater 130 is provided in the second connection line 240, and the electromagnetic two-way valve 220 is provided in the third connection line 250.

In an alternative embodiment, one end of the condenser 400 is connected to one end of the plate heat exchanger 110 through a fifth connection pipe 270, and the other end of the condenser 400 is connected to the other end of the plate heat exchanger 110 through a sixth connection pipe 280;

A compressor 500 is provided in the fifth connection pipe 270, and an electronic expansion valve 600 is provided in the sixth connection pipe 280.

The coolant inlet 800 and the coolant inlet 900 of the water chiller are both connected with the cold plate of the energy storage battery compartment, after the coolant enters the first connecting pipeline 230 from the coolant inlet 800, the coolant enters the plate heat exchanger 110 after being pressurized by the coolant pump 700, the coolant temperature passing through the plate heat exchanger 110 is reduced, and then enters the cold plate of the energy storage battery compartment from the coolant inlet 900, so that heat in the cold plate of the energy storage battery compartment is brought out, and the energy storage battery compartment has proper working temperature.

A fluid-replacement port is also provided in the first cover 150 for supplementing coolant, and illustratively communicates with the first connecting tube 230.

When the ambient temperature is low, the electromagnetic two-way valve 220 is in an open state, and the coolant can also enter the dry cooler 300, and the dry cooler 300 is used to cool the coolant.

The coolant in the first connecting pipe 230 enters the third connecting pipe 250 and then enters the drier-cooler 300, the coolant exchanges heat at the drier-cooler 300 to reduce the temperature of the coolant, and the cooled coolant enters the fourth connecting pipe 260 and then enters the second connecting pipe 240 along the fourth connecting pipe 260, thereby realizing the cooling of the energy storage battery compartment.

When the surrounding environment is high, the electromagnetic two-way valve 220 is in a closed state, the secondary refrigerant enters the plate heat exchanger 110, and the plate heat exchanger 110 exchanges heat with the secondary refrigerant to realize cooling of the secondary refrigerant.

The plate heat exchanger 110 is connected to the condenser 400 through the fifth connecting line 270 and the sixth connecting line 280, after the refrigerant exchanges heat with the coolant at the plate heat exchanger 110, the refrigerant absorbs heat from the coolant at the plate heat exchanger 110, the refrigerant evaporates into a low-temperature low-pressure gaseous refrigerant, the refrigerant then enters the compressor 500 to be compressed into a high-temperature high-pressure superheated gas, the superheated refrigerant vapor enters the condenser 400 to be condensed into a high-temperature high-pressure supercooled liquid, the refrigerant then enters the electronic expansion valve 600 to be throttled and depressurized, the throttled refrigerant is in a low-temperature low-pressure gas-liquid two-phase state, and the refrigerant evaporates into a low-temperature low-pressure gas again after absorbing heat in the plate heat exchanger 110 to enter the compressor 500. The refrigeration cycle is thus continuously performed.

When the compressor 500 is not started, the plate heat exchanger 110 cannot cool the secondary refrigerant, that is, when the external temperature is low enough, the secondary refrigerant can meet the cooling requirement of the energy storage battery compartment through the main cooler 300, the compressor 500 is not started to realize natural cooling, and when the cooling requirement of the energy storage battery compartment cannot be met by using the main cooler 300 alone, the compressor 500 is started, and natural cooling and mechanical cooling are combined to cool the energy storage battery compartment.

When the external environment is high, the electromagnetic two-way valve 220 is in a closed state, all the coolant enters the plate heat exchanger 110, and the coolant in the plate heat exchanger 110 is cooled by the condenser 400, namely, mechanical refrigeration.

When the ambient temperature is at an excessively low temperature, the pipeline may be heated by the heater 130 at the time of start-up, preventing the pipeline from being frozen and unusable.

In an alternative embodiment, a filter screen 140 is disposed at the air inlet;

The fan cavity is internally provided with a fan mounting plate 100, at least one heat dissipation fan 200 is arranged on the fan mounting plate 100, and each heat dissipation fan 200 corresponds to one air outlet.

In some embodiments, the air inlet is provided with the filter screen 140, and air enters the air inlet cavity after being filtered by the filter screen 140, so that larger foreign matters can be prevented from entering the water chilling unit, and the heat exchange efficiency is prevented from being influenced.

The fan mounting plate 100 is provided with the heat dissipation fans 200, and the fan mounting plate 100 is provided with two heat dissipation fans 200, the second cover 160 is provided with two air outlets, each heat dissipation fan 200 corresponds to one air outlet, the heat dissipation fans 200 are provided with the air guide ring, the air guide ring is favorable for guiding air in the fan cavity into the heat dissipation fans 200, the air in the fan cavity is discharged from the air outlets rapidly, the air flow in the water chilling unit is accelerated, the two heat dissipation fans 200 are symmetrically distributed, the air flow curve of the heat dissipation fans 200 is reasonably utilized, the air quantity is improved, and meanwhile, the power consumption of the heat dissipation fans 200 is reduced.

The secondary refrigerant can be water or glycol solution, the refrigerant can be freon, and the like, and the secondary refrigerant and the refrigerant are both in the prior art.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims

1. The water chilling unit is characterized by comprising a water chilling unit, wherein a first cover (150) is arranged at a first end of the water chilling unit, and a second cover (160) is arranged at a second end of the water chilling unit;

The water chiller comprises a first cover body (150), a second cover body (160), a cold water machine set, a condenser (400) and a water heater, wherein the first cover body (160) is provided with at least one air inlet, and the second cover body (160) is provided with at least one air outlet;

An air inlet cavity is formed between the first cover body (150) and the dry cooler (300), and an air flow cavity is formed between the dry cooler (300) and the condenser (400), and a fan cavity is formed between the condenser (400) and the second cover body (160);

The first direction is a direction from the first cover (150) to the second cover (160).

2. The water chiller according to claim 1 wherein the dry cooler (300) and the condenser (400) are both V-shaped;

The V-shaped tips of the drier-cooler (300) and the condenser (400) face the first cover body (150), and the V-shaped openings of the drier-cooler (300) and the condenser (400) face the second cover body (160).

3. The water chiller according to claim 2, wherein the V-shaped setting angles of the dry cooler (300) and the condenser (400) are the same, and are arranged in a stacked manner, and the distance between the dry cooler (300) and the condenser (400) is set to be 6-15mm.

4. The water chiller according to claim 1 wherein a plate heat exchanger (110) is disposed within the air intake chamber, the plate heat exchanger (110) being disposed proximate a tip of the dry cooler (300).

5. The water chiller according to claim 4, wherein a third cover (170) and a fourth cover (180) are respectively arranged at two sides of the first direction of the water chiller, and two ends of the third cover (170) and the fourth cover (180) in the first direction are respectively connected with the first cover (150) and the second cover (160);

the first cover (150), the second cover (160), the third cover (170) and the fourth cover (180) form a frame, an upper end cover is arranged at the upper end of the frame, and a lower bottom cover (210) is arranged at the lower end of the frame.

6. The water chiller according to claim 5 wherein an electrical control assembly (120) is disposed within the air intake chamber;

The electronic control assembly (120) is slidably arranged on the inner side of the third cover body (170), an assembly hole is formed in the first cover body (150), and one end of the electronic control assembly (120) is clamped outside the first cover body (150) and connected with the first cover body (150).

7. The cooling water set according to claim 5, wherein a compressor (500), a secondary refrigerant liquid pump (700), a heater (130) and an expansion tank (190) are further arranged in the air inlet cavity, the compressor (500), the secondary refrigerant liquid pump (700), the heater (130) and the expansion tank (190) are all horizontally arranged, the compressor (500) is arranged close to the third cover (170), the heater (130) is arranged close to the fourth cover (180), the secondary refrigerant liquid pump (700) is arranged close to the plate heat exchanger (110), and the expansion tank (190) is arranged inside the fourth cover (180) and is arranged close to the first cover (150).

8. The water chiller according to claim 7 wherein a coolant inlet (800) and a coolant supply (900) are provided on the first cover (150);

A first connecting pipeline (230) is arranged between the plate heat exchanger (110) and the secondary refrigerant liquid inlet (800), and a second connecting pipeline (240) is arranged between the secondary refrigerant liquid inlet (900) and the plate heat exchanger (110);

The dry cooler (300) is connected with the first connecting pipeline (230) through a third connecting pipeline (250), and the dry cooler (300) is connected with the second connecting pipeline (240) through a fourth connecting pipeline (260);

The heater (130) is arranged on the second connecting pipeline (240), and an electromagnetic two-way valve (220) is arranged on the third connecting pipeline (250).

9. The water chiller according to claim 4, wherein one end of the condenser (400) is connected to one end of the plate heat exchanger (110) through a fifth connection pipe (270), and the other end of the condenser (400) is connected to the other end of the plate heat exchanger (110) through a sixth connection pipe (280);

A compressor (500) is provided to the fifth connecting line (270), and an electronic expansion valve (600) is provided to the sixth connecting line (280).

10. The water chiller according to claim 1 wherein a filter screen (140) is provided at the air inlet;

The fan cavity is internally provided with a fan mounting plate (100), at least one heat dissipation fan (200) is arranged on the fan mounting plate (100), and each heat dissipation fan (200) corresponds to one air outlet.