Low-temperature water chilling unit

Abstract

The invention discloses a low-temperature water chilling unit, relates to the technical field of water chilling machines, and aims to solve the problem that an existing water chilling machine is difficult to meet differential refrigeration requirements of equipment in different fields. Comprising a compressor and a water chiller controller which are arranged on a bottom metal plate, the two ends of the compressor are connected with a micro-channel condenser and an evaporator water tank respectively, an environment temperature detection device is arranged at one end of the micro-channel condenser, a water tank temperature detection device is arranged in the evaporator water tank, and one end of the evaporator water tank is connected with a water pump. The other end of the water pump is connected with the cooling water outlet and the other end of the evaporator water tank is connected with the cooling water inlet. A low-temperature water chilling unit can meet the refrigeration requirements of equipment in most fields, a water chilling machine controller carries out automatic control response, and the working efficiency of a water chilling machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water chillers, and in particular to a low-temperature water chiller. Background Art

[0002] Water chillers are equipment designed to ensure that precision instruments work under constant temperature conditions. Water chillers are widely used in various fields of industrial production activities. Since each field has differentiated requirements for refrigeration media and refrigeration temperatures, existing water chillers often find it difficult to meet the above differentiated requirements and cannot achieve differentiated control of different temperatures; and some water chillers are large in size, making it difficult to meet the requirements of portability.

[0003] The Chinese patent with publication number CN116624965A relates to a control method, device and chiller for a water chiller. The water chiller includes K heads, where K is a positive integer greater than or equal to 2. However, the patent mainly performs predictive control based on target load demand, and the control strategy is relatively complex. It is impossible to achieve differentiated control in a short time, and the patent does not involve a specific chiller structure. Summary of the invention

[0004] The present invention solves the problem that existing chillers are difficult to meet the differentiated refrigeration requirements of equipment in different fields, and proposes a low-temperature chiller that can meet the refrigeration requirements of equipment in most fields. The chiller controller performs automatic control response to improve the working efficiency of the chiller.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a low-temperature chiller, comprising a compressor and a chiller controller arranged on a bottom sheet metal, wherein the two ends of the compressor are respectively connected to a microchannel condenser and an evaporator water tank, one end of the microchannel condenser is provided with an ambient temperature detection device, and the evaporator water tank is provided with a water tank temperature detection device, one end of the evaporator water tank is connected to a water pump, the other end of the water pump is connected to a cooling water outlet, and the other end of the evaporator water tank is connected to a cooling water inlet.

[0006] The low-temperature chiller of the present technical solution can first control the cooling of the medium to -20°C and then independently operate the water pump to output the medium. During the refrigeration cycle, the compressor inhales low-temperature and low-pressure refrigerant gas, and performs work to compress it into high-temperature and high-pressure refrigerant gas; the high-temperature and high-pressure refrigerant gas is forced to release heat and liquefy into a high-pressure liquid at room temperature through the microchannel condenser; the liquefied high-pressure refrigerant liquid is converted into a low-temperature and low-pressure gas-liquid two-phase refrigerant through capillary throttling, and then enters the stainless steel evaporator coil of the water tank, where the refrigerant absorbs the heat of the water tank liquid and vaporizes into a low-temperature and low-pressure refrigerant gas, which is finally inhaled and compressed by the compressor, repeating the cycle.

[0007] The present invention is further configured as follows: the evaporator water tank is a coil evaporator water tank, and the evaporator water tank comprises a water tank body arranged outside and a coil evaporator arranged inside the water tank body.

[0008] In the technical solution, a coil evaporator water tank is adopted, and the refrigerant can absorb the heat of the water tank liquid more evenly, thereby converting the refrigerant into a low-temperature and low-pressure refrigerant gas.

[0009] The present invention is further configured as follows: the microchannel condenser is fixed by a condenser mounting bracket, a heat dissipation fan is installed at the other end of the condenser mounting bracket, a dustproof net mounting bracket is fixed at the other end of the condenser mounting bracket, and the dustproof net mounting bracket is fixed with a dustproof net.

[0010] In the present technical solution, in order to ensure uniform heat dissipation, a plurality of through holes are provided on the condenser mounting bracket, and a heat dissipation fan is installed in each through hole.

[0011] The present invention is further configured such that the exhaust port of the compressor is connected to the inlet port of the microchannel condenser, and a high-pressure switch is provided in the intermediate bypass between the compressor and the microchannel condenser.

[0012] In the present technical solution, a high-pressure pressure switch is arranged at the exhaust port of the compressor, which can protect the exhaust pressure from exceeding the set value and play a protective role.

[0013] The present invention is further configured as follows: the outlet of the microchannel condenser is also connected to a drying filter, the other end of the drying filter is connected to a throttling device, and the other end of the throttling device is connected to an evaporator water tank.

[0014] In this technical solution, the outlet of the microchannel condenser is connected to the dry filter by welding, and then the throttling effect is achieved through the throttling device, and then after passing through the evaporator water tank, the refrigerant fully exchanges heat with the medium in the water tank, and then returns to the air intake of the compressor after passing through the evaporator water tank, and the refrigeration effect is achieved by repeating the cycle.

[0015] The present invention is further configured as follows: one end of the water pump is connected to a ball valve, the other end of the ball valve is connected to a drain joint, and the drain joint is the cooling water outlet.

[0016] In this technical solution, the liquid flows into the water pump through the pipeline, the water pump pumps the liquid out, passes through the evaporator water tank, connects to the ball valve above, and then connects to the user's pipeline to take away the heat at the customer's end.

[0017] The present invention is further configured such that: the outer edge of the evaporator water tank is evenly wrapped with heat insulation cotton.

[0018] In this technical solution, heat-insulating cotton is provided to maintain the temperature of the medium in the water tank.

[0019] The present invention is further configured as follows: the ambient temperature detection device is an ambient temperature sensor, the water tank temperature detection device is a water tank temperature sensor, and both the ambient temperature sensor and the water tank temperature sensor are connected to a chiller controller.

[0020] In the present technical solution, the ambient temperature sensor can monitor the ambient temperature, the water tank temperature sensor can monitor the water tank temperature, and both the ambient temperature sensor and the water tank temperature sensor can transmit the collected temperature data to the chiller controller.

[0021] The present invention is further configured as follows: the chiller controller includes a computing unit, the computing unit is connected to a compressor control unit, the computing unit processes temperature data of an ambient temperature sensor and a water tank temperature sensor, and the compressor control unit controls the opening and closing of the compressor.

[0022] In this technical solution, the control of the chiller is achieved through the computing unit and the compressor control unit.

[0023] The present invention is further configured such that: the throttling device is a capillary tube.

[0024] In this technical solution, a throttling effect can be achieved through the capillary tube.

[0025] The present invention can bring the following beneficial effects: 1 The present invention relates to a low-temperature chiller, which can meet the refrigeration requirements of equipment in most fields, and the chiller controller performs automatic control response to improve the working efficiency of the chiller; 2 The present invention can independently control the water pump to achieve the effect of preserving the low-temperature medium and using it whenever needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a low-temperature chiller from one angle in the present application.

[0027] Figure 2 This is a structural schematic diagram of a low-temperature chiller from another angle of the present application.

[0028] Figure 3 It is a structural schematic diagram of an evaporator water tank of a low-temperature chiller unit of the present application.

[0029] Figure 4 It is a structural schematic diagram of a low-temperature chiller microchannel condenser and its accessories of the present application.

[0030] Figure 5 It is a schematic diagram of a low-temperature chiller of the present application.

[0031] Figure numerals: 1, compressor 2, microchannel condenser 3, cooling fan 4, drying filter 5, high-pressure pressure switch 6, throttling device 7, water pump 8, water inlet 9, ball valve 10, drain joint 11, return water joint 12, condenser mounting bracket 13, dust net mounting bracket 14, cooling fan 15, coil evaporator water tank 16, first solenoid valve 17, second solenoid valve 151, water tank body 152, coil evaporator. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Chillers are equipment that ensures that precision instruments work under constant temperature conditions. These high-precision, high-energy-density instruments generate a lot of heat during processing. If they are not cooled in time, the instruments will overheat and be damaged. With the protection of a chiller, they can be processed under a constant temperature. Chillers were originally only used for spindle engraving equipment, CO2 laser cutting machines, and CO2 laser marking machines. Now they have developed to meet the refrigeration of fiber laser cutting machines, UV laser cutting / marking equipment, ultrafast laser equipment, medical equipment, and laboratory equipment. There are more complete types to meet the refrigeration needs of various fields in industrial production.

[0034] However, different fields have different requirements for refrigeration media and refrigeration temperatures. Existing chillers often find it difficult to meet the above-mentioned differentiated requirements and cannot achieve differentiated control of different temperatures. In addition, some chillers are large in size and difficult to meet the requirements of portability.

[0035] Example 1 refer to Figure 1 , Figure 2 and Figure 5The present application proposes a low-temperature chiller, which mainly includes a compressor 1 and a chiller controller. The compressor 1 is arranged on the bottom sheet metal, and the chiller controller is arranged on the side of the bottom sheet metal. One end of the compressor 1 is connected to the microchannel condenser 2, and the other end of the compressor 1 is connected to the evaporator water tank 15. One end of the microchannel condenser 2 is provided with a corresponding ambient temperature detection device, and a water tank temperature detection device is provided inside the evaporator water tank 15. One end of the evaporator water tank 15 is connected to the water pump 7, and the other end of the water pump 7 is connected to the cooling water outlet, and the other end of the evaporator water tank 15 is connected to the cooling water inlet.

[0036] The dimensions of a low-temperature chiller in this embodiment are 450 width*400 depth*600 height, in mm; it can be placed at the bottom of an ordinary laboratory table and can provide a cooling medium of -20°C to 30°C. Conventional laboratory seats are all larger than 670mm. Since the height of the chiller is 600mm, it can be easily placed under a conventional laboratory table and hidden, and the water outlet and water inlet can be rotated 360 degrees, so that the purpose of connecting external pipelines in different directions can be achieved according to actual needs.

[0037] For more details, see Figure 3 The evaporator water tank 15 is specifically a coil evaporator water tank. The evaporator water tank 15 mainly includes a water tank body 151. The water tank body 151 of this embodiment is a rectangular parallelepiped water tank. Of course, it can also be a water tank of other shapes, which is not limited here. The evaporator water tank 15 also includes a coil evaporator 152. The coil evaporator 152 is specifically arranged inside the water tank body 151. The coil evaporator 152 is distributed in a cylindrical ring shape.

[0038] In the above technical solution, a coil evaporator water tank is used, and the refrigerant can absorb the heat of the water tank liquid more evenly, thereby converting the refrigerant into a low-temperature and low-pressure refrigerant gas.

[0039] refer to Figure 1 , Figure 2 and Figure 4 The microchannel condenser 2 is specifically fixedly connected through a condenser mounting bracket 12, and a plurality of cooling fans 14 are fixedly installed on the other end of the condenser mounting bracket 12. The other end of the condenser mounting bracket 12 is fixed to a dustproof net mounting bracket 13, and the dustproof net mounting bracket 13 is fixedly connected to the dustproof net.

[0040] In the technical solution, in order to ensure uniform heat dissipation, a plurality of through holes are provided on the condenser mounting bracket 12, and a heat dissipation fan is installed in each through hole. In the present embodiment, four through holes are provided on the condenser mounting bracket 12, and a corresponding heat dissipation fan is installed in each through hole, so there are also four heat dissipation fans in the present embodiment.

[0041] refer to Figure 1 and Figure 2 The exhaust port of the compressor 1 is connected to the inlet of the microchannel condenser 2, and a high-pressure switch 5 is provided in the intermediate bypass between the compressor 1 and the microchannel condenser 2.

[0042] In the above-mentioned technical solution, the high-pressure pressure switch 5 is arranged at the exhaust port of the compressor 1, which can protect the exhaust pressure from exceeding the set value and play a protective role.

[0043] refer to Figure 1 , Figure 2 and Figure 5 The outlet of the microchannel condenser 2 is also connected to the drying filter 4 , the other end of the drying filter 4 is connected to the throttling device 6 , and the other end of the throttling device 6 is connected to the evaporator water tank 15 .

[0044] In the above technical solution, the outlet of the microchannel condenser 2 is connected to the drying filter 4 by welding, and then the throttling effect is achieved through the throttling device 6. After passing through the evaporator water tank 15, the refrigerant fully exchanges heat with the medium in the water tank. After passing through the evaporator water tank 15, the refrigerant returns to the suction port of the compressor 1, and the refrigeration effect is achieved by repeating the cycle.

[0045] More specifically, the throttling device 6 is a capillary tube to achieve a throttling effect.

[0046] refer to Figure 5 One end of the water pump 7 is connected to the ball valve 9, and the other end of the ball valve 9 is connected to the drain joint 10, which is the cooling water outlet.

[0047] In the above technical solution, the liquid flows into the water pump 7 through the pipeline, and the water pump 7 pumps the liquid out, passes through the evaporator water tank 15, connects to the ball valve 9 above, and then connects to the user's pipeline to take away the heat at the customer's end. In this embodiment, the operation of the water pump 7 is controlled separately by the corresponding switch to achieve the function of outputting the medium at any time, and there is a corresponding ball valve 9 at the water outlet, which can achieve the effect of controlling the flow of the cooling medium.

[0048] The outer edge of the evaporator water tank 15 is evenly wrapped with heat insulation cotton. In the present technical solution, the heat insulation cotton is provided to maintain the temperature of the medium in the water tank.

[0049] In the technical solution, the above-mentioned ambient temperature detection device is an ambient temperature sensor, and the above-mentioned water tank temperature detection device is a water tank temperature sensor. The above-mentioned ambient temperature sensor and water tank temperature sensor are both connected to the chiller controller. In this embodiment, the ambient temperature sensor and the water tank temperature sensor can be connected to the chiller controller through wired or wireless communication.

[0050] In this embodiment, the ambient temperature sensor can monitor the ambient temperature, the water tank temperature sensor can monitor the water tank temperature, and both the ambient temperature sensor and the water tank temperature sensor can transmit the collected temperature data to the chiller controller.

[0051] In more detail, the chiller controller includes an operation unit and a compressor control unit. The operation unit is electrically connected to the compressor control unit. The function of the operation unit is to process the temperature data of the ambient temperature sensor and the water tank temperature sensor. The function of the compressor control unit is to control the opening and closing of the compressor.

[0052] In the above technical solution, the control of the chiller is achieved through the computing unit and the compressor control unit.

[0053] In this embodiment, a plurality of universal casters are also provided at the bottom of the low-temperature chiller to facilitate movement and placement.

[0054] In this embodiment, a water injection port 8 is provided at the top of the low-temperature water chiller, and a drainage joint 10 and a return water joint 11 are provided at the edge of the water injection port 8 .

[0055] A first solenoid valve 16 is further provided between the exhaust port of the compressor 1 and the evaporator water tank 15 , and a second solenoid valve 17 is provided between the throttling device 6 and the microchannel condenser 2 .

[0056] In this embodiment, the low-temperature chiller can first control the medium to cool to -20°C and then run the water pump 7 to output the medium. During the refrigeration cycle, the compressor 1 inhales the low-temperature and low-pressure refrigerant gas, and compresses it into a high-temperature and high-pressure refrigerant gas by work; the high-temperature and high-pressure refrigerant gas is forced to release heat and liquefy into a high-pressure and normal-temperature liquid through the microchannel condenser 2; the liquefied high-pressure refrigerant liquid is converted into a low-temperature and low-pressure gas-liquid two-phase refrigerant through capillary throttling, and then enters the stainless steel evaporating coil of the water tank. The refrigerant absorbs the heat of the water tank liquid and vaporizes into a low-temperature and low-pressure refrigerant gas, and is finally sucked in and compressed by the compressor, and the cycle repeats. The circulating liquid lowered by the coil is sucked in by the water pump, and the water pump 7 outputs it through the water tank to the liquid outlet. There is a flow regulating valve in front of the liquid outlet, and the outlet is discharged to the user end and returns to the water tank after heat exchange.

[0057] refer to Figure 1 and Figure 2The compressor 1 is fixed on the bottom sheet metal, the exhaust port of the compressor 1 is connected to the inlet of the microchannel condenser 2, and a high-pressure pressure switch 5 is bypassed in the middle (to protect the exhaust pressure from exceeding the set value). The microchannel condenser 2 is connected to the heat dissipation fan 3 through the sheet metal, and the heat dissipation fan 3 takes away the heat of the microchannel condenser 2. The outlet of the microchannel condenser 2 is connected to the drying filter 4 by welding, and then passes through the capillary of the throttling device 6 to achieve the throttling effect. After passing through the evaporator water tank 15, it fully exchanges heat with the medium in the water tank. After passing through the evaporator water tank 15, the refrigerant returns to the suction port of the compressor 1, and this cycle is repeated to achieve the cooling effect.

[0058] The circulating liquid loop is for pouring liquid from the water inlet 8. Just open the lid, and then the liquid flows into the water pump 7 through the pipeline. The water pump 7 pumps the liquid out, passes through the evaporator water tank 15, and is connected to the ball valve C3 above. Then, it is connected to the user's pipeline through the drain joint 10, taking away the heat from the customer's end, and returns to the return water joint 11 after passing through the user's pipeline, and flows into the water tank to repeat the heat exchange with the coil evaporator 152. This cycle is repeated to achieve the effect of taking away the heat from the user end.

[0059] Example 2 refer to Figure 1 , Figure 2 and Figure 5 The present application proposes a low-temperature chiller, which includes a compressor 1 and a chiller controller. The compressor 1 is arranged on the bottom sheet metal, and the chiller controller is arranged on the side of the bottom sheet metal. One end of the compressor 1 is connected to the microchannel condenser 2, and the other end of the compressor 1 is connected to the evaporator water tank 15. One end of the microchannel condenser 2 is provided with a corresponding ambient temperature detection device, and a water tank temperature detection device is provided inside the evaporator water tank 15. One end of the evaporator water tank 15 is connected to the water pump 7, and the other end of the water pump 7 is connected to the cooling water outlet, and the other end of the evaporator water tank 15 is connected to the cooling water inlet.

[0060] For more details, see Figure 3 The evaporator water tank 15 is specifically a coil evaporator water tank. The evaporator water tank 15 mainly includes a water tank body 151. The water tank body 151 of this embodiment is a rectangular parallelepiped water tank. Of course, it can also be a water tank of other shapes, which is not limited here. The evaporator water tank 15 also includes a coil evaporator 152. The coil evaporator 152 is specifically arranged inside the water tank body 151. The coil evaporator 152 is distributed in a cylindrical ring shape.

[0061] In the above technical solution, a coil evaporator water tank is used, and the refrigerant can absorb the heat of the water tank liquid more evenly, thereby converting the refrigerant into a low-temperature and low-pressure refrigerant gas.

[0062] refer to Figure 1 , Figure 2 and Figure 4 The microchannel condenser 2 is specifically fixedly connected through a condenser mounting bracket 12, and a plurality of cooling fans 14 are fixedly installed on the other end of the condenser mounting bracket 12. The other end of the condenser mounting bracket 12 is fixed to a dustproof net mounting bracket 13, and the dustproof net mounting bracket 13 is fixedly connected to the dustproof net.

[0063] In the technical solution, in order to ensure uniform heat dissipation, a plurality of through holes are provided on the condenser mounting bracket 12, and a heat dissipation fan is installed in each through hole. In the present embodiment, four through holes are provided on the condenser mounting bracket 12, and a corresponding heat dissipation fan is installed in each through hole, so there are also four heat dissipation fans in the present embodiment.

[0064] refer to Figure 1 and Figure 2 The exhaust port of the compressor 1 is connected to the inlet of the microchannel condenser 2, and a high-pressure switch 5 is provided in the intermediate bypass between the compressor 1 and the microchannel condenser 2.

[0065] In the above-mentioned technical solution, the high-pressure pressure switch 5 is arranged at the exhaust port of the compressor 1, which can protect the exhaust pressure from exceeding the set value and play a protective role.

[0066] refer to Figure 1 , Figure 2 and Figure 5 The outlet of the microchannel condenser 2 is also connected to the drying filter 4 , the other end of the drying filter 4 is connected to the throttling device 6 , and the other end of the throttling device 6 is connected to the evaporator water tank 15 .

[0067] In the above technical solution, the outlet of the microchannel condenser 2 is connected to the drying filter 4 by welding, and then the throttling effect is achieved through the throttling device 6. After passing through the evaporator water tank 15, the refrigerant fully exchanges heat with the medium in the water tank. After passing through the evaporator water tank 15, the refrigerant returns to the suction port of the compressor 1, and the refrigeration effect is achieved by repeating the cycle.

[0068] More specifically, the throttling device 6 is a capillary tube to achieve a throttling effect.

[0069] refer to Figure 5 One end of the water pump 7 is connected to the ball valve 9, and the other end of the ball valve 9 is connected to the drain joint 10, which is the cooling water outlet.

[0070] In the above technical solution, the liquid flows into the water pump 7 through the pipeline, the water pump 7 pumps the liquid out, passes through the evaporator water tank 15, is connected to the ball valve 9 above, and then is connected to the user's pipeline to take away the heat at the customer's end.

[0071] The outer edge of the evaporator water tank 15 is evenly wrapped with heat insulation cotton. In the present technical solution, the heat insulation cotton is provided to maintain the temperature of the medium in the water tank.

[0072] In the technical solution, the above-mentioned ambient temperature detection device is an ambient temperature sensor, and the above-mentioned water tank temperature detection device is a water tank temperature sensor. The above-mentioned ambient temperature sensor and water tank temperature sensor are both connected to the chiller controller. In this embodiment, the ambient temperature sensor and the water tank temperature sensor can be connected to the chiller controller through wired or wireless communication.

[0073] In this embodiment, the ambient temperature sensor can monitor the ambient temperature, the water tank temperature sensor can monitor the water tank temperature, and both the ambient temperature sensor and the water tank temperature sensor can transmit the collected temperature data to the chiller controller.

[0074] In more detail, the chiller controller includes an operation unit and a compressor control unit. The operation unit is electrically connected to the compressor control unit. The function of the operation unit is to process the temperature data of the ambient temperature sensor and the water tank temperature sensor. The function of the compressor control unit is to control the opening and closing of the compressor.

[0075] In the above technical solution, the control of the chiller is achieved through the computing unit and the compressor control unit.

[0076] In this embodiment, a water injection port 8 is provided at the top of the low-temperature water chiller, and a drainage joint 10 and a return water joint 11 are provided at the edge of the water injection port 8 .

[0077] A first solenoid valve 16 is further provided between the exhaust port of the compressor 1 and the evaporator water tank 15 , and a second solenoid valve 17 is provided between the throttling device 6 and the microchannel condenser 2 .

[0078] Different from the first embodiment, this embodiment further provides a control method for a low-temperature chiller. Since an ambient temperature sensor is installed at one end of the microchannel condenser 2 and a water tank temperature sensor is installed in the coil evaporator 152, when in use, the corresponding target temperature is first set and the target temperature is specifically input into the chiller controller. After the chiller controller processes the input target temperature, the processed temperature data is calculated in the calculation unit of the chiller controller to obtain an instruction on whether to start the compressor 1. After obtaining the instruction to start the compressor 1, the instruction is sent to the compressor control unit, which reviews the instruction and determines the specific target compressor of the instruction. After determining the specific target compressor, the compressor control unit sends the instruction to the receiving message end of the compressor 1 through the communication module. The receiving message end of the compressor 1 parses and reads the instruction after receiving the instruction. If the instruction is to start the compressor 1, the compressor 1 is immediately turned on for cooling. When the water tank temperature sensor detects that the temperature reaches the target temperature, the chiller controller sends a stop instruction to stop the action of the compressor 1. There is thermal insulation cotton on the outside of the evaporator water tank 15, which can well maintain the medium temperature in the water tank. In addition, the water pump can be started and stopped by pressing button M to control the output to the outside, and the target temperature can be maintained when not in use.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A low temperature chiller, characterized in that: The invention comprises a compressor (1) and a chiller controller arranged on a bottom sheet metal, wherein two ends of the compressor (1) are respectively connected to a microchannel condenser (2) and an evaporator water tank (15), one end of the microchannel condenser (2) is provided with an ambient temperature detection device, the evaporator water tank (15) is provided with a water tank temperature detection device, one end of the evaporator water tank (15) is connected to a water pump (7), the other end of the water pump (7) is connected to a cooling water outlet, and the other end of the evaporator water tank (15) is connected to a cooling water inlet.

2. A low temperature water chiller according to claim 1, characterized in that: The evaporator water tank (15) is a coil evaporator water tank, and the evaporator water tank (15) comprises a water tank body (151) arranged outside and a coil evaporator (152) arranged inside the water tank body (151).

3. A low temperature water chiller according to claim 1 or 2, characterized in that: The microchannel condenser (2) is fixed by a condenser mounting bracket (12), a heat dissipation fan (14) is mounted on the other end of the condenser mounting bracket (12), a dustproof net mounting bracket (13) is fixed on the other end of the condenser mounting bracket (12), and a dustproof net is fixed on the dustproof net mounting bracket (13).

4. A low temperature water chiller according to claim 1 or 2, characterized in that: The exhaust port of the compressor (1) is connected to the inlet port of the microchannel condenser (2), and a high-pressure switch (5) is provided in a bypass between the compressor (1) and the microchannel condenser (2).

5. A low temperature water chiller according to claim 4, characterized in that: The outlet of the microchannel condenser (2) is also connected to a drying filter (4), the other end of the drying filter (4) is connected to a throttling device (6), and the other end of the throttling device (6) is connected to an evaporator water tank (15).

6. A low temperature water chiller according to claim 1, characterized in that: One end of the water pump (7) is connected to a ball valve (9), and the other end of the ball valve (9) is connected to a drainage joint (10), and the drainage joint (10) is the cooling water outlet.

7. A low temperature water chiller according to claim 1, characterized in that: The outer edge of the evaporator water tank (15) is evenly wrapped with heat-insulating cotton.

8. A low temperature water chiller according to claim 1, 2 or 5, characterized in that: The ambient temperature detection device is an ambient temperature sensor, and the water tank temperature detection device is a water tank temperature sensor. Both the ambient temperature sensor and the water tank temperature sensor are connected to the chiller controller.

9. A low temperature water chiller according to claim 8, characterized in that: The chiller controller includes a computing unit, which is connected to a compressor control unit. The computing unit processes temperature data from an ambient temperature sensor and a water tank temperature sensor. The compressor control unit controls the on and off of the compressor.

10. A low temperature water chiller according to claim 5, characterized in that: The throttling device (6) is a capillary tube.

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