Adjustable rapid heating and cooling system

Abstract

The utility model provides an adjustable rapid heating and cooling system which comprises a temperature control system, the temperature control system comprises a refrigeration module and a heating module, the refrigeration module comprises an auto-cascade refrigeration system and an auxiliary refrigeration system, and the heating module comprises a steam heating system. The auto-cascade refrigeration system comprises a first compressor, an oil separator, a condenser and a first drying filter which are sequentially arranged, and the first drying filter is sequentially connected with an auxiliary subcooler, a first channel of a subcooling heat exchanger, a gas-liquid separator, a first channel of an intermediate heat exchanger, an evaporation expansion valve and a first channel of an evaporator. A first channel of the evaporator is connected with the inlet end of the first compressor through a second channel of the intermediate heat exchanger and a second channel of the supercooling heat exchanger. The inlet end of the evaporator second channel is connected with the heating module and supplies cold to the heating system. According to the utility model, a refrigerating system is combined with municipal energy-saving steam, so that not only can the cost of applicable equipment of a user be reduced, but also various functional requirements of the user can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial refrigeration, and in particular relates to an adjustable rapid temperature rise and fall system. Background Art

[0002] At present, refrigeration and heating equipment is widely used in industrial engineering, biomedicine, construction and civil fields, mainly used to provide the required temperature environment for industrial production. Commonly used refrigeration and heating equipment generally adopts a combination of "compressor + electric heater", which is expensive, large in size, and occupies more space. In addition, the power of electric heating equipment is high, which is not energy-saving and environmentally friendly, and has a high risk factor. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an adjustable rapid heating and cooling system. The adjustable rapid heating and cooling system of the utility model can not only reduce the user's applicable equipment cost, but also meet the user's various functional requirements through the idea of ​​"combining the refrigeration system with municipal energy-saving steam".

[0004] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0005] An adjustable rapid temperature rise and fall system comprises a temperature control system, wherein the temperature control system comprises a refrigeration module and a heating module, wherein the refrigeration module comprises a self-cascade refrigeration system and an auxiliary refrigeration system; and the heating module comprises a steam heating system;

[0006] The self-cascade refrigeration system comprises a first compressor, wherein the outlet end of the first compressor is connected to the inlet end of an oil separator, the outlet end of the oil separator is connected to the first inlet end of a condenser, the first outlet end of the condenser is connected to the inlet end of a first filter drier, the outlet end of the first filter drier is connected to the inlet end of a first channel of an auxiliary subcooler, the outlet end of the first channel of the auxiliary subcooler is connected to the inlet end of a first channel of a subcooling heat exchanger, the outlet end of the first channel of the subcooling heat exchanger is connected to the inlet end of a gas-liquid separator, the outlet end of the gas-liquid separator is connected to the inlet end of a first channel of an intermediate heat exchanger, the outlet end of the first channel of the intermediate heat exchanger is connected to the inlet end of the first channel of the evaporator through an evaporation expansion valve, the outlet end of the first channel of the evaporator is connected to the inlet end of a second channel of the intermediate heat exchanger, the outlet end of the second channel of the intermediate heat exchanger is connected to the inlet end of a second channel of the subcooling heat exchanger, and the outlet end of the second channel of the subcooling heat exchanger is connected to the inlet end of the first compressor;

[0007] The inlet end of the second channel of the evaporator is connected to the heating module to provide cooling for the heating system.

[0008] Further, the outlet end of the oil separator and the inlet end of the first compressor form a circulation loop;

[0009] The outlet end of the first channel of the evaporator and the inlet end of the second channel of the intermediate heat exchanger are connected to the inlet end of the gas-liquid separator through an intermediate expansion valve.

[0010] Furthermore, the auto-cascade refrigeration system also includes a thermostatic valve, one end of which is connected between the outlet end of the oil separator and the first inlet end of the condenser, and the other end of which is connected to the inlet end of the first channel of the evaporator.

[0011] Furthermore, the auto-cascade refrigeration system further comprises a buffer tank, an inlet end of the buffer tank is connected to an outlet end of the first channel of the auxiliary subcooler, and an outlet end of the buffer tank is connected to an inlet end of the first compressor.

[0012] Further, the auxiliary refrigeration system includes a second compressor, an inlet end of the second compressor is connected to the outlet end of the second channel of the auxiliary subcooler, the inlet end of the second channel of the auxiliary subcooler is connected to the outlet end of the second filter drier through an expansion valve, the inlet end of the second filter drier is connected to the outlet end of the liquid storage tank, the inlet end of the liquid storage tank is connected to the second outlet end of the condenser, and the second inlet end of the condenser is connected to the outlet end of the second compressor.

[0013] Furthermore, a temperature sensor and a pressure transmitter are provided at both the inlet and outlet ends of the second compressor.

[0014] Furthermore, the heating module includes a circulation pump, a mixing tank and a heat exchanger, the outlet end of the circulation pump is connected to the inlet end of the second channel of the evaporator, the inlet end of the circulation pump is connected to the outlet end of the mixing tank, the inlet end of the mixing tank is connected to the outlet end of the reactor jacket, and the inlet end of the reactor jacket is connected to the outlet end of the second channel of the evaporator.

[0015] Furthermore, the inlet end of the heat exchanger is connected to the compressed air pipeline and the steam pipeline at the same time, a solenoid valve is arranged between the inlet end of the heat exchanger and the compressed air pipeline, and a pneumatic switch valve and a pneumatic regulating valve are arranged between the inlet end of the heat exchanger and the steam pipeline;

[0016] The outlet end of the heat exchanger is connected to the condensate pipeline and the three-way reversing valve at the same time, and the outlet end of the heat exchanger is also connected to the inlet end of the reactor jacket through a one-way valve;

[0017] One end of the three-way reversing valve is connected to the outlet end of the heat exchanger, one end is connected to the outlet end of the second channel of the evaporator, and one end is connected between the one-way valve and the inlet end of the reactor jacket.

[0018] Furthermore, the heating module also includes an expansion tank, the inlet end of the expansion tank is connected to the outlet end of the mixing tank through a stop valve, the outlet end of the expansion tank is connected to the inlet end of the mixing tank through a one-way valve, and the one-way valve only allows the heat transfer medium to enter the mixing tank from the expansion tank.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0020] 1. The adjustable rapid temperature rise and fall system of the utility model can realize rapid and wide temperature range free adjustment within the range of -70℃~+130℃. This is due to the combination of the characteristics of the self-cascade refrigeration system that can achieve rapid cooling in a short time and the advantages of high-efficiency steam heating.

[0021] 2. The temperature mode switching of the adjustable rapid heating and cooling system of the utility model is extremely convenient. The introduction of a three-way reversing valve and a steam switch valve cooperates with multiple working modes such as single heating, single cooling, and circulating temperature control. The temperature control accuracy during the working process is improved compared with traditional single cooling and heating equipment, and can meet the user's "mode + accuracy" needs at the same time.

[0022] 3. The heating part of the device of the utility model is municipal steam. The steam resource is green, environmentally friendly, cheap and abundant, so the user's use cost and subsequent maintenance cost are relatively low.

[0023] 4. Compared with ordinary refrigeration and heating equipment, the adjustable rapid heating and cooling system of the utility model replaces the electric heater with municipal steam as the heating part, and the equipment power is greatly reduced. In addition, electric heating is very dangerous and generally requires explosion-proof treatment. Steam heating is safer, and electric heating equipment with the same power is large in size, while steam heating devices can provide the same heating effect in smaller equipment, so they can be used in more places. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a rapid temperature adjustment and heating and cooling system in an embodiment of the utility model.

[0025] Figure 2 This is a schematic diagram of the operating status of a three-way reversing valve. Among them, port a is the inlet; ports b and c are the outlets; ports a / b are connected, and power is obtained; ports a / c are connected, and power is lost.

[0026] Explanation of the reference numerals: 1-first compressor; 2-oil separator; 3-condenser; 4-first drying filter; 5-auxiliary subcooler; 6-subcooling heat exchanger; 7-gas-liquid separator; 8-intermediate heat exchanger; 9-intermediate expansion valve; 10-evaporation expansion valve; 11-thermostatic valve; 12-evaporator; 13-buffer tank; 14-second compressor; 15-liquid storage tank; 16-second drying filter; 17-expansion valve; 18-circulating pump; 19-mixing tank; 20-expansion tank; 21-solenoid valve; 22-pneumatic switch valve; 23-pneumatic regulating valve; 24-heat exchanger; 25-three-way reversing valve. DETAILED DESCRIPTION

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] Example 1

[0030] An adjustable rapid temperature rise and fall system comprises a temperature control system, the temperature control system comprises a refrigeration module and a heating module, the refrigeration module comprises a self-cascade refrigeration system and an auxiliary refrigeration system, and the heating module comprises a steam heating system;

[0031] The auto-cascade refrigeration system includes a compressor 1, an oil separator 2, a condenser 3, a first drying filter 4, an auxiliary subcooler 5, a subcooling heat exchanger 6, a gas-liquid separator 7, an intermediate heat exchanger 8, an intermediate expansion valve 9, an evaporation expansion valve 10, a thermostatic valve 11, an evaporator 12 and a buffer tank 13;

[0032] The outlet end of the first compressor 1 is connected to the inlet end of the oil separator 2, the outlet end of the oil separator 2 is connected to the first inlet end of the condenser 3, the first outlet end of the condenser 3 is connected to the inlet end of the first filter drier 4, the outlet end of the first filter drier 4 is connected to the inlet end of the first channel of the auxiliary subcooler 5, the outlet end of the first channel of the auxiliary subcooler 5 is connected to the inlet end of the first channel of the subcooling heat exchanger 6, the outlet end of the first channel of the subcooling heat exchanger 6 is connected to the inlet end of the gas-liquid separator 7, the outlet end of the gas-liquid separator 7 is connected to the inlet end of the first channel of the intermediate heat exchanger 8, the outlet end of the first channel of the intermediate heat exchanger 8 is connected to the inlet end of the first channel of the evaporator 12 through the evaporation expansion valve 10, the outlet end of the first channel of the evaporator 12 is connected to the inlet end of the second channel of the intermediate heat exchanger 8, the outlet end of the second channel of the intermediate heat exchanger 8 is connected to the inlet end of the second channel of the subcooling heat exchanger 6, and the outlet end of the second channel of the subcooling heat exchanger 6 is connected to the inlet end of the first compressor 1;

[0033] The inlet end of the second channel of the evaporator 12 is connected to the heating module to provide cooling for the heating system.

[0034] The outlet end of the oil separator 2 and the inlet end of the first compressor 1 form a circulation loop;

[0035] The outlet end of the first channel of the evaporator 12 and the inlet end of the second channel of the intermediate heat exchanger 8 are connected to the inlet end of the gas-liquid separator 7 via the intermediate expansion valve 9 .

[0036] A pressure transmitter is provided between the outlet end of the first channel of the evaporator 12 and the inlet end of the second channel of the intermediate heat exchanger 8. One end of the intermediate expansion valve 9 is connected between the pressure transmitter and the inlet end of the second channel of the intermediate heat exchanger 8, and the other end is connected to the inlet end of the gas-liquid separator 7.

[0037] A pressure transmitter and a temperature sensor are provided between the outlet end of the first compressor 1 and the inlet end of the oil separator 2 ; a temperature sensor is provided between the outlet end of the second channel of the subcooling heat exchanger 6 and the inlet end of the first compressor 1 .

[0038] One end of the thermostatic valve 11 is connected between the outlet end of the oil separator 2 and the first inlet end of the condenser 3 , and the other end is connected to the inlet end of the first channel of the evaporator 12 .

[0039] The inlet of the buffer tank 13 is connected to the outlet of the first channel of the auxiliary subcooler 5, and the outlet of the buffer tank 13 is connected to the inlet of the first compressor 1. A load relief valve is provided between the outlet of the first channel of the auxiliary subcooler 5 and the inlet of the buffer tank 13.

[0040] The auxiliary refrigeration system of the refrigeration module includes a compressor 14, a condenser 3, a liquid storage tank 15, a second drying filter 16, an expansion valve 17 and an auxiliary subcooler 5. The auxiliary subcooler 5 provides precooling for the auto-cascade refrigeration system.

[0041] The inlet end of the second compressor 14 is connected to the outlet end of the second channel of the auxiliary subcooler 5, the inlet end of the second channel of the auxiliary subcooler 5 is connected to the outlet end of the second drying filter 16 through the expansion valve 17, the inlet end of the second drying filter 16 is connected to the outlet end of the liquid storage tank 15, the inlet end of the liquid storage tank 15 is connected to the second outlet end of the condenser 3, and the second inlet end of the condenser 3 is connected to the outlet end of the second compressor 14.

[0042] The inlet and outlet ends of the second compressor 14 are both provided with temperature sensors and pressure transmitters.

[0043] The heating module includes a circulation pump 18 , a mixing tank 19 , an expansion tank 20 , a solenoid valve 21 , a pneumatic switch valve 22 , a pneumatic regulating valve 23 , a heat exchanger 24 and a three-way reversing valve 25 .

[0044] The outlet end of the circulation pump 18 is connected to the inlet end of the second channel of the evaporator 12, the inlet end of the circulation pump 18 is connected to the outlet end of the mixing tank 19, the inlet end of the mixing tank 19 is connected to the outlet end of the reactor jacket, and the inlet end of the reactor jacket is connected to the outlet end of the second channel of the evaporator 12.

[0045] The inlet end of the heat exchanger 24 is connected to the compressed air pipeline and the steam pipeline at the same time. A solenoid valve 21 is arranged between the inlet end of the heat exchanger 24 and the compressed air pipeline, and a pneumatic switch valve 22 and a pneumatic regulating valve 23 are arranged between the inlet end of the heat exchanger 24 and the steam pipeline.

[0046] The outlet of the heat exchanger 24 is connected to the condensate pipeline and the three-way reversing valve 25 at the same time. The outlet of the heat exchanger 24 is also connected to the inlet of the reactor jacket through a one-way valve. The one-way valve only allows the heat transfer medium to flow from the heat exchanger 24 into the reactor jacket.

[0047] One end of the three-way reversing valve 25 is connected to the outlet of the heat exchanger 24, one end is connected to the outlet of the second channel of the evaporator 12, and one end is connected between the one-way valve and the inlet of the reactor jacket.

[0048] The inlet end of the expansion tank 20 is connected to the outlet end of the mixing tank 19 through a stop valve, and the outlet end of the expansion tank 20 is connected to the inlet end of the mixing tank 19 through a one-way valve, which only allows the heat transfer medium to enter the mixing tank 19 from the expansion tank 20.

[0049] Steam path: Municipal steam enters the steam pipeline and passes through the pressure gauge, pneumatic switch valve 22, pneumatic regulating valve 23 and heat exchanger 24 in sequence to become condensed water, and is discharged from the outlet end of the heat exchanger 24 through the condensed water pipeline;

[0050] Heat transfer medium circulation path: The heat transfer medium comes out of the reactor jacket and enters the mixing tank 19, then passes through the circulation pump 18, enters the evaporator 12, and then passes through the three-way reversing valve 25, enters the heat exchanger 24 to exchange heat with steam or directly flows back to the reactor jacket, and then circulates again.

[0051] A temperature transmitter and a pressure transmitter are arranged at the outlet of the rapid temperature rise and fall system, and a temperature transmitter is arranged at the inlet; a hand valve is arranged between the inlet end of the reactor jacket and the outlet end of the rapid temperature rise and fall system, and between the outlet end of the reactor jacket and the inlet end of the rapid temperature rise and fall system.

[0052] Working Mode:

[0053] (1) Single refrigeration: If the user needs to cool the heat transfer medium in the reactor jacket from room temperature to -70°C, the rapid temperature rise and fall system of the utility model only needs to directly start the first compressor 1 and the second compressor 14, close the steam switch valve, and adjust the three-way reversing valve 25 to Figure 2 In the ab channel shown, the heat transfer medium circulates through the evaporator 12 to exchange heat with the refrigerant and then drops to the required temperature.

[0054] (2) Single heating: If the user needs to raise the temperature of the heat transfer medium in the reactor jacket from room temperature to +130°C, the rapid temperature rise and fall system of the utility model only needs to directly close the first compressor 1 and the second compressor 14, open the steam switch valve, and adjust the three-way reversing valve 25 to Figure 2 In the ac channel shown, the heat transfer medium passes through the circulation path, exchanges heat with steam through the heat exchanger 24, and rises to the required temperature. A regulating valve 23 is also provided on the steam inlet pipeline, which can control the heating rate and the target temperature by adjusting the proportional opening to achieve user precision adjustment.

[0055] (3) -70℃~+130℃ wide temperature range control: If the user's reactor needs to react at a specified temperature, the rapid temperature rise and fall system of the utility model can run the refrigeration system and the heating system at the same time, turn on the first compressor 1, the second compressor 14 and the steam switch valve, and adjust the three-way reversing valve 25 to Figure 2 The ac channel shown in the figure makes the heat transfer medium reach the specified temperature through the counteraction of cooling and heating, and works in a cycle to meet the user's demand for precise temperature control.

[0056] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An adjustable rapid heating and cooling system, characterized in that: It includes a temperature control system, the temperature control system includes a refrigeration module and a heating module, the refrigeration module includes a self-cascade refrigeration system and an auxiliary refrigeration system, and the heating module includes a steam heating system; The auto-cascade refrigeration system comprises a first compressor (1), wherein the outlet end of the first compressor (1) is connected to the inlet end of an oil separator (2), the outlet end of the oil separator (2) is connected to the first inlet end of a condenser (3), the first outlet end of the condenser (3) is connected to the inlet end of a first drying filter (4), the outlet end of the first drying filter (4) is connected to the inlet end of a first channel of an auxiliary subcooler (5), the outlet end of the first channel of the auxiliary subcooler (5) is connected to the inlet end of a first channel of a subcooling heat exchanger (6), and the outlet end of the first channel of the subcooling heat exchanger (6) is connected to a gas-liquid separator. The inlet end of the gas-liquid separator (7) is connected to the inlet end of the first channel of the intermediate heat exchanger (8), the outlet end of the first channel of the intermediate heat exchanger (8) is connected to the inlet end of the first channel of the evaporator (12) through the evaporation expansion valve (10), the outlet end of the first channel of the evaporator (12) is connected to the inlet end of the second channel of the intermediate heat exchanger (8), the outlet end of the second channel of the intermediate heat exchanger (8) is connected to the inlet end of the second channel of the subcooling heat exchanger (6), and the outlet end of the second channel of the subcooling heat exchanger (6) is connected to the inlet end of the first compressor (1); The inlet end of the second channel of the evaporator (12) is connected to a heating module to supply cold air to the heating system.

2. The adjustable rapid heating and cooling system according to claim 1, characterized in that: The outlet end of the oil separator (2) and the inlet end of the first compressor (1) form a circulation loop; The outlet end of the first channel of the evaporator (12) and the inlet end of the second channel of the intermediate heat exchanger (8) are connected to the inlet end of the gas-liquid separator (7) via an intermediate expansion valve (9).

3. The adjustable rapid heating and cooling system according to claim 1, characterized in that: The auto-cascade refrigeration system further comprises a thermostatic valve (11), one end of the thermostatic valve (11) being connected between the outlet end of the oil separator (2) and the first inlet end of the condenser (3), and the other end of the thermostatic valve (11) being connected to the inlet end of the first channel of the evaporator (12).

4. The adjustable rapid heating and cooling system according to claim 1, characterized in that: The auto-cascade refrigeration system further comprises a buffer tank (13), the inlet end of the buffer tank (13) being connected to the outlet end of the first channel of the auxiliary subcooler (5), and the outlet end of the buffer tank (13) being connected to the inlet end of the first compressor (1).

5. The adjustable rapid heating and cooling system according to claim 1, characterized in that: The auxiliary refrigeration system comprises a second compressor (14), the inlet end of the second compressor (14) is connected to the outlet end of the second channel of the auxiliary subcooler (5), the inlet end of the second channel of the auxiliary subcooler (5) is connected to the outlet end of a second filter drier (16) via an expansion valve (17), the inlet end of the second filter drier (16) is connected to the outlet end of a liquid storage tank (15), the inlet end of the liquid storage tank (15) is connected to the second outlet end of the condenser (3), and the second inlet end of the condenser (3) is connected to the outlet end of the second compressor (14).

6. The adjustable rapid heating and cooling system according to claim 5, characterized in that: The inlet and outlet ends of the second compressor (14) are both provided with a temperature sensor and a pressure transmitter.

7. The adjustable rapid heating and cooling system according to claim 1, characterized in that: The heating module comprises a circulation pump (18), a mixing tank (19) and a heat exchanger (24); the outlet end of the circulation pump (18) is connected to the inlet end of the second channel of the evaporator (12); the inlet end of the circulation pump (18) is connected to the outlet end of the mixing tank (19); the inlet end of the mixing tank (19) is connected to the outlet end of the reactor jacket; and the inlet end of the reactor jacket is connected to the outlet end of the second channel of the evaporator (12).

8. The adjustable rapid heating and cooling system according to claim 7, characterized in that: The inlet end of the heat exchanger (24) is connected to both a compressed air pipeline and a steam pipeline, a solenoid valve (21) is provided between the inlet end of the heat exchanger (24) and the compressed air pipeline, and a pneumatic switch valve (22) and a pneumatic regulating valve (23) are provided between the inlet end of the heat exchanger (24) and the steam pipeline; The outlet end of the heat exchanger (24) is connected to the condensate pipeline and the three-way reversing valve (25) at the same time, and the outlet end of the heat exchanger (24) is also connected to the inlet end of the jacket of the reactor through a one-way valve; One end of the three-way reversing valve (25) is connected to the outlet end of the heat exchanger (24), one end is connected to the outlet end of the second channel of the evaporator (12), and one end is connected between the one-way valve and the inlet end of the reactor jacket.

9. The adjustable rapid heating and cooling system according to claim 7, characterized in that: The heating module further comprises an expansion tank (20), the inlet end of the expansion tank (20) being connected to the outlet end of the mixing tank (19) via a stop valve, the outlet end of the expansion tank (20) being connected to the inlet end of the mixing tank (19) via a one-way valve, and the one-way valve only allowing the heat transfer medium to enter the mixing tank (19) from the expansion tank (20).

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