Air-cooling cold-storage composite refrigeration device

Abstract

The utility model discloses an air cooling and cold storage composite refrigerating device which comprises a refrigerating system and a cold storage system. The refrigerating system comprises a compressor, a condenser, a liquid storage device, a first electromagnetic valve, a first expansion valve, an evaporator, a gas-liquid separator, a second electromagnetic valve, a second expansion valve and a first set of flow channels of a plate heat exchanger. The cold storage system comprises a cold storage box, a water pump and a second set of flow channels of the plate heat exchanger. Refrigeration and cold accumulation are combined, the air conditioner has the advantages of being easy to adjust, low in cost and high in reliability, and due to the fact that the PTC electric heater is adopted, the fan can be stopped immediately when electric heating is stopped.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of refrigeration device for special equipment, and specifically relates to a combined air-cooled and cold storage refrigeration device. BACKGROUND

[0002] The refrigeration device for air and liquid cooling adjustment of special equipment requires cooling different spaces and equipment, and the cooling forms are different, wherein a part of the space such as a cab adopts air-cooled cooling, and another part of the heat generating equipment needs to provide cooling liquid cooling at low temperature. At present, two independent refrigeration devices are used for the refrigeration device for air and liquid cooling adjustment, and such a design has many components, complex pipelines, high cost, low reliability, large power consumption, and the power supply of the special equipment is limited due to the oil engine power supply, and it is also difficult to simultaneously meet the power requirements of the two independent refrigeration devices.

[0003] In addition, the current heating methods include heat pump heating, fuel heating and electric heating. Generally, the air conditioning heating device of various special equipment (such as vehicles) needs to work in a low-temperature environment in the wild, and therefore higher requirements are put forward for the air conditioning heating device. The heat pump heating has very poor heating effect at a low temperature of-45 DEG C; the fuel heater needs to increase a corresponding fin heat exchanger, and the structure is relatively complex, so there are many fault points and low reliability; the electric heating utilizes the Joule effect of electric current to convert electric energy into heat energy to heat the air flowing through the heater, and the electric heating pipe and the heat exchanger are tightly connected together, but the electric heating pipe cannot be started and stopped at will. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a combined air-cooled and cold storage refrigeration device to solve the problems of complex structure, low reliability and large power consumption of the two independent refrigeration devices for special equipment in the prior art, and the problem of electric heating that cannot be started and stopped at will.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The combined air-cooled and cold storage refrigeration device comprises a refrigeration system and a cold storage system, the refrigeration system comprises a compressor (101), a condenser (102) provided with a condensing fan (1), a liquid accumulator (103), a solenoid valve one (106), an expansion valve one (107), an evaporator (108) provided with an evaporating fan pipe unit (2), a gas-liquid separator (109), a solenoid valve two (110), an expansion valve two (111) and a plate heat exchanger (112).

[0007] In the refrigeration system, the outlet of the compressor (101) is connected with the inlet of the condenser (102) through a pipeline, the outlet of the condenser (102) is connected with the inlet of the liquid accumulator (103) through a pipeline, the outlet of the liquid accumulator (103) is connected with the inlet of the electromagnetic valve one (106) through a pipeline, the outlet of the electromagnetic valve one (106) is connected with the inlet of the expansion valve one (107) through a pipeline, the outlet of the expansion valve one (107) is connected with the inlet of the evaporator (108) through a pipeline, the outlet of the evaporator (108) is connected with the inlet of the gas-liquid separator (109) through a pipeline, and the outlet of the gas-liquid separator (109) is connected with the return of the compressor (101) through a pipeline; the outlet of the liquid accumulator (103) is also connected with the inlet of the electromagnetic valve two (110) through a pipeline, the electromagnetic valve two (110) and the electromagnetic valve one (106) are interlocked, the outlet of the electromagnetic valve two (110) is connected with the inlet of the expansion valve two (111) through a pipeline; the plate heat exchanger (112) has two groups of flow channels, the outlet of the expansion valve two (111) is connected with the inlet of the first group of flow channels of the plate heat exchanger (112) through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger (112) is connected with the inlet of the gas-liquid separator (109) through a pipeline.

[0008] The cold storage system comprises a cold storage tank (201) and a water pump (204), the outlet of the cold storage tank (201) is connected with the inlet of the second group of flow channels of the plate heat exchanger (112) through a pipeline, the outlet of the second group of flow channels of the plate heat exchanger (112) is connected with the inlet of the water pump (204) through a pipeline, and the outlet of the water pump (204) is connected with the return of the cold storage tank (201) through a pipeline.

[0009] Further, in the refrigeration system, the electromagnetic valve one (106) is a normally closed electromagnetic valve, and the electromagnetic valve two (110) is a normally open electromagnetic valve.

[0010] Further, in the refrigeration system, a PTC electric heater (3) is installed on the air inlet side of the evaporator (108), and an external controller is in electrical connection with the PTC electric heater (3).

[0011] Further, in the refrigeration system, a pressure sensor (116) is installed on the inlet pipeline of the liquid accumulator (103) through a needle valve two (115), a pressure protector (114) is installed on the inlet pipeline of the gas-liquid separator, and the pressure sensor (116) and the pressure protector (114) are respectively in electrical connection with an external controller.

[0012] Further, in the refrigeration system, a temperature sensor one (117) is arranged on the air inlet side of the evaporator (108), the evaporator (108) is provided with a temperature sensor two (118), and the condenser (102) is provided with a temperature sensor three, and the temperature sensor one (117), the temperature sensor two (118) and the temperature sensor three are respectively in electrical connection with an external controller.

[0013] Further, the water pump (204) of the cold storage system is connected with a stop valve one (202), and the outlet pipeline of the water pump (204) is connected with a stop valve two (205).

[0014] Further, the cold storage system is provided with a temperature sensor (209) and a photoelectric liquid level switch, and the temperature sensor (209) and the photoelectric liquid level switch are electrically connected with an external controller.

[0015] The refrigeration and cold storage composite refrigeration system can realize air cooling refrigeration when air cooling is needed, and can realize cold storage refrigeration when air cooling is not needed, and the adjustment is simple, the cost is low, and the reliability is high.

[0016] Compared with the prior art, the refrigeration and cold storage composite refrigeration system has the following advantages:

[0017] 1) The refrigeration and cold storage composite refrigeration system has few components, few connecting pipelines, simple structure, and convenient control.

[0018] 2) The refrigeration and cold storage composite refrigeration system can realize air cooling refrigeration and cold storage refrigeration, and the air cooling refrigeration and the cold storage refrigeration are interlocked, so that the air cooling refrigeration and the cold storage refrigeration requirements are realized, and the power problem is solved.

[0019] 3) The refrigeration and cold storage composite refrigeration system selects a normally closed electromagnetic valve one and a normally open electromagnetic valve two, so that the normally closed electromagnetic valve one and the normally open electromagnetic valve two are prevented from frequently operating, the normally closed electromagnetic valve one and the normally open electromagnetic valve two are interlocked, and reliable cold storage can be realized when air cooling is not needed.

[0020] 4) The refrigeration and cold storage composite refrigeration system adopts PTC electric heating to realize electric heating stop, and the fan can be immediately stopped.

[0021] 5) The refrigeration and cold storage composite refrigeration system adopts a photoelectric liquid level switch to realize simple and reliable alarm.

[0022] 6) The refrigeration and cold storage composite refrigeration system fixes the pressure sensor on the needle valve, so that the pressure sensor is convenient to maintain and repair.

[0023] 7) The refrigeration and cold storage composite refrigeration system is provided with a pressure protector, so that the refrigeration system can be effectively protected, and safety and reliability are realized. DRAWINGS

[0024] Figure 1 is a structural principle diagram of an embodiment of the refrigeration and cold storage composite refrigeration system. DETAILED DESCRIPTION

[0025] The refrigeration and cold storage composite refrigeration system will be further described below in combination with the drawings and embodiments.

[0026] As Figure 1 shown, the embodiment discloses a wind-cooled cold storage composite refrigeration device, comprising a refrigeration system, a cold storage system, wherein:

[0027] The refrigeration system comprises a compressor 101, a condenser 102 provided with a condensing fan 1, a liquid accumulator 103, a filter 104, a sight glass 105, a solenoid valve one 106, an expansion valve one 107, an evaporator 108 provided with an evaporating fan coil unit 2, a gas-liquid separator 109, a solenoid valve two 110, an expansion valve two 111, and a plate heat exchanger 112. The solenoid valve one 106 is a normally closed solenoid valve, the solenoid valve two 110 is a normally open solenoid valve, and the solenoid valve one 106 and the solenoid valve two 110 are interlocked. The plate heat exchanger 112 has two groups of flow channels, and the media flowing in the two groups of flow channels exchange heat through the plate heat exchanger 112 body.

[0028] In the refrigeration system, the outlet of the compressor 101 is connected to the inlet of the condenser 102 through a pipeline, the air inlet side of the condenser 102 is provided with a temperature sensor 119, the outlet of the condenser 102 is connected to the inlet of the liquid accumulator 103 through a pipeline, and the inlet pipeline of the liquid accumulator 103 is bypassed and provided with a pressure sensor 116 through a needle valve two 115, so that the pressure sensor 116 is convenient to maintain and repair.

[0029] The outlet of the liquid accumulator 103 is connected to the inlet of the filter 104 through a pipeline, the outlet of the filter 104 is connected to the inlet of the sight glass 105 through a pipeline, the outlet of the sight glass 105 is connected to the inlet of the solenoid valve one 106 through a pipeline, so that the outlet of the liquid accumulator 103 is connected to the inlet of the solenoid valve one 106 through the filter 104 and the sight glass 105. The outlet of the solenoid valve one 106 is connected to the inlet of the expansion valve one 107 through a pipeline, and the outlet of the expansion valve one 107 is connected to the inlet of the evaporator 108 through a pipeline. The air inlet side of the evaporator 108 is provided with a PTC electric heater 3 and a temperature sensor one 117, the coil of the evaporator 108 is provided with a temperature sensor two 118, and the outlet of the evaporator 108 is connected to the inlet of the gas-liquid separator 109 through a pipeline.

[0030] The outlet of the gas-liquid separator 109 is connected to the return inlet of the compressor 101 through a pipeline, a pressure protector 114 is installed between the return inlet of the compressor 101 and the outlet of the gas-liquid separator 109, the shutdown of the refrigeration compressor 101 is controlled through the pressure protector 114, and the idle running of the compressor 101 under the condition of no refrigerant is effectively avoided. In addition, a needle valve one 113 is bypassed and connected between the return inlet of the compressor 101 and the outlet of the gas-liquid separator 109 to facilitate the system to be filled with refrigerant.

[0031] The outlet of the sight glass 105 is also connected with the inlet of the electromagnetic valve two 110 through another pipeline, so that the outlet of the liquid accumulator 103 is also connected with the inlet of the electromagnetic valve two 110 through the filter 104 and the sight glass 105. The outlet of the electromagnetic valve two 110 is connected with the inlet of the expansion valve two 111 through a pipeline, the outlet of the expansion valve two 111 is connected with the inlet of the first group of flow channels of the plate heat exchanger 112 through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger 112 is connected with the inlet of the gas-liquid separator 109 through a pipeline.

[0032] The cold storage system comprises a cold storage tank 201, a stop valve one 202, a filter 203, a water pump 204, and a stop valve two 205. The upper part of the cold storage tank 201 is provided with a photoelectric liquid level switch two 207, the lower part of the cold storage tank 201 is provided with a photoelectric liquid level switch one 206, the top of the cold storage tank 201 is provided with an automatic exhaust valve 208, and the inside of the cold storage tank 201 is further provided with a temperature sensor 209. The outlet of the cold storage tank 201 is connected with the inlet of the second group of flow channels of the plate heat exchanger 112 in the refrigeration system through a pipeline, the outlet of the second group of flow channels of the plate heat exchanger 112 is connected with the inlet of the stop valve one 202 through a pipeline, the outlet of the stop valve one 202 is connected with the inlet of the filter 203 through a pipeline, the outlet of the filter 203 is connected with the inlet of the water pump 204 through a pipeline, the outlet of the water pump 204 is connected with the inlet of the stop valve two 205 through a pipeline, and the outlet of the stop valve two 205 is connected with the return of the cold storage tank 201 through a pipeline.

[0033] In the embodiment, the pressure sensor 116, the pressure protector 114, the temperature sensor one 117, the temperature sensor two 118, the temperature sensor three, the temperature sensor 209, the photoelectric liquid level switch one 206, and the photoelectric liquid level switch two 207 of the refrigeration system and the cold storage system are respectively connected with an external controller for signal transmission.

[0034] The embodiment has an air-cooled refrigeration mode and a cold storage refrigeration mode.

[0035] In the air-cooled refrigeration mode, the electromagnetic valve one 106 is opened, the electromagnetic valve two 110 is closed, and the refrigerant flow direction of the compressor 101 is: the compressor 101→the condenser 102→the liquid accumulator 103→the filter 104→the sight glass 105→the electromagnetic valve one 106→the expansion valve one 107→the evaporator 108→the gas-liquid separator 109→the compressor 101. At this time, the refrigerant is cooled by the condenser wind machine 1 arranged on the condenser 102 and exchanges heat with the outside, then enters the evaporator 108 after being further cooled by the expansion valve one 107, and the evaporator wind machine 2 arranged on the evaporator 108 works to realize the heat exchange between the refrigerant and the indoor air of the special equipment, so as to realize refrigeration.

[0036] In the cold accumulation refrigeration mode, the electromagnetic valve one 106 is closed, the electromagnetic valve two 110 is opened, the refrigerant flow direction of the compressor 101 is: compressor 101→condenser 102→accumulator 103→filter 104→sight glass 105→electromagnetic valve two 110→expansion valve two 111→the first group flow passage of the plate heat exchanger 112→gas-liquid separator 109→compressor 101. And at this time, the cold accumulation system works, the cooling liquid flow direction in the cold accumulation tank 201 is: cold accumulation tank 201→the second group flow passage of the plate heat exchanger 112→stop valve one 202→filter 203→water pump 204→stop valve two 205→cold accumulation tank 201. In the cold accumulation refrigeration mode, the refrigerant exchanges heat with the cooling liquid output by the cold accumulation system in the plate heat exchanger 112, so as to realize the cooling liquid temperature reduction and the cold accumulation tank refrigeration.

[0037] When it is needed to start the air-cooled refrigeration mode, the cold accumulation refrigeration mode is closed; when it is needed to start the cold accumulation refrigeration mode, the air-cooled refrigeration mode is closed. The compressor 101, the condenser 102, the accumulator 103, the filter 104, the sight glass 105, the gas-liquid separator 109 and the condensing fan 1 are shared in the air-cooled refrigeration and the cold accumulation refrigeration, the number of components used is small, the connection pipeline is less, the structure is simple, and the control is convenient. And the air-cooled cooling and the cold accumulation cooling requirements are realized, and the power problem is solved. The selection of the normally closed electromagnetic valve one 106 and the normally open electromagnetic valve two 110 avoids the frequent operation of the electromagnetic valve one 106 and the electromagnetic valve two 110, solves the two-way interlocking in the system circuit, and solves the reliable cold accumulation in the case of no air cooling.

[0038] The system load start-stop sequence of the embodiment is as follows: the air-cooled refrigeration is started in the order of the evaporating fan 2, the electromagnetic valve one 106, the condensing fan 1 and the compressor 101, and the closing sequence is reversed. The cold accumulation refrigeration is started in the order of the water pump 204, the cold accumulation refrigeration system working is started in the order of the condensing fan 1 and the compressor 101, and the closing sequence is reversed. This avoids system failure, solves the compressor oil return problem, and improves the reliability of the system.

[0039] In the heating work of the embodiment, the air delivered by the evaporating fan 2 is heated by the PTC electric heater, the electric heating can be stopped through the PTC electric heater, and the fan can be immediately stopped without delaying the evaporating fan 2 when the heating is stopped.

[0040] In the embodiment, the cold accumulation tank 201 can also perform liquid discharge work through the liquid discharge valve 210.

[0041] In the embodiment, the photoelectric liquid level switch one 206 and the photoelectric liquid level switch two 207 are arranged on the cold accumulation tank 201, and the different liquid levels of the cold accumulation tank 201 are sensed through the photoelectric liquid level switch one 206 and the photoelectric liquid level switch two 207. When the liquid level is too high or too low, the photoelectric liquid level switch alarms simply and reliably.

[0042] The preferred embodiments of the present application are described in detail above with reference to the drawings. The embodiments described in the present application are merely a description of the preferred embodiments of the present application, and are not intended to limit the concept and scope of the present application. In the above specific embodiments, each specific technical feature described can be combined in any suitable manner without contradiction, and such combination should also be considered as disclosed by the present disclosure, as long as it does not deviate from the technical concept of the present application. In order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0043] The present application is not limited to the specific details described in the above embodiments, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art within the technical concept of the present application and without departing from the design idea of the present application should fall within the protection scope of the present application. The technical content claimed by the present application has been fully recorded in the claims.

Claims

1. A combined air-cooled and cold- stored refrigeration device, characterized in that It includes refrigeration system, cold storage system; the refrigeration system includes compressor (101), condenser (102) equipped with condensing fan (1), liquid accumulator (103), solenoid valve one (106), expansion valve one (107), evaporator (108) equipped with evaporating fan coil unit (2), gas-liquid separator (109), solenoid valve two (110), expansion valve two (111), plate heat exchanger (112); In the refrigeration system, the outlet of the compressor (101) is connected to the inlet of the condenser (102) through a pipeline, the outlet of the condenser (102) is connected to the inlet of the liquid accumulator (103) through a pipeline, the outlet of the liquid accumulator (103) is connected to the inlet of the solenoid valve one (106) through a pipeline, the outlet of the solenoid valve one (106) is connected to the inlet of the expansion valve one (107) through a pipeline, the outlet of the expansion valve one (107) is connected to the inlet of the evaporator (108) through a pipeline, the outlet of the evaporator (108) is connected to the inlet of the gas-liquid separator (109) through a pipeline, and the outlet of the gas-liquid separator (109) is connected to the return of the compressor (101) through a pipeline; the outlet of the liquid accumulator (103) is also connected to the inlet of the solenoid valve two (110) through a pipeline, and the solenoid valve two (110) and the solenoid valve one (106) are interlocked, the outlet of the solenoid valve two (110) is connected to the inlet of the expansion valve two (111) through a pipeline; the plate heat exchanger (112) has two groups of flow channels, the outlet of the expansion valve two (111) is connected to the inlet of the first group of flow channels of the plate heat exchanger (112) through a pipeline, and the outlet of the first group of flow channels of the plate heat exchanger (112) is connected to the inlet of the gas-liquid separator (109) through a pipeline; The cold storage system includes a cold storage tank (201) and a water pump (204), the outlet of the cold storage tank (201) is connected to the inlet of the second group of flow channels of the plate heat exchanger (112) through a pipeline, the outlet of the second group of flow channels of the plate heat exchanger (112) is connected to the inlet of the water pump (204) through a pipeline, and the outlet of the water pump (204) is connected to the return of the cold storage tank (201) through a pipeline.

2. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, In the refrigeration system, the solenoid valve one (106) is a normally closed electromagnetic valve, and the solenoid valve two (110) is a normally open electromagnetic valve.

3. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, In the refrigeration system, a PTC electric heater (3) is installed on the air inlet side of the evaporator (108), and an external controller is electrically connected with the PTC electric heater (3) for control.

4. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, In the refrigeration system, a pressure sensor (116) is installed on the inlet pipeline of the liquid accumulator (103) through a needle valve two (115), a pressure protector (114) is installed on the inlet pipeline of the gas-liquid separator, and the pressure sensor (116) and the pressure protector (114) are respectively electrically connected with an external controller.

5. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, In the refrigeration system, a temperature sensor one (117) is arranged on the air inlet side of the evaporator (108), the evaporator (108) is provided with a temperature sensor two (118), and the condenser (102) is provided with a temperature sensor three, and the temperature sensor one (117), the temperature sensor two (118), and the temperature sensor three are respectively electrically connected with an external controller.

6. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, The water pump (204) is connected with a stop valve one (202) at the inlet pipeline, and a stop valve two (205) at the outlet pipeline.

7. The air-cooled and liquid-cooled combined refrigeration device according to claim 1, characterized in that, The cold storage system is provided with a temperature sensor (209) and a photoelectric liquid level switch, and the temperature sensor (209) and the photoelectric liquid level switch are electrically connected with an external controller.

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