1. The utility model provides a low temperature type constant temperature and humidity freezer unit which characterized in that includes: the air circulation system (1), the air circulation system (1) includes setting up in the indoor air conduit (14) of freezer, the air intake and air outlet of air conduit (14) all communicate the interior space of freezer, the air conduit (14) divide into table cold section (11), heating section (12) and fan section (13), table cold section (11) are used for the air cooling, heating section (12) are located the air-out side of table cold section (11) and are used for the air heating accuse temperature, be provided with the fan that is used for air circulation in fan section (13); the refrigeration system (2) comprises a surface cooler (21), a refrigerant pipeline (22) and an outdoor unit (23), wherein the surface cooler (21) is arranged in a surface cooling section (11) and used for cooling air, the outdoor unit (23) is arranged outside the refrigeration house and used for dissipating heat, the refrigerant pipeline (22) is connected between the outdoor unit (23) and the surface cooler (21) and used for exchanging heat between the outdoor unit (23) and the surface cooler (21); the hot water source is arranged outside the refrigeration house; a defrost system (4), the defrost system (4) comprising a defrost shower (42) and a defrost water source; the defrosting sprayer (42) is arranged in the surface cooling section (11) and is used for spraying water to the surface of the surface cooler (21), and a defrosting water source is arranged outside the refrigeration house.

2. The low-temperature type constant-temperature and constant-humidity freezer unit according to claim 1, wherein the heating source comprises a heating water tank (31), a heating water inlet pipeline (34) and a heating water return pipeline (38); the heating water inlet pipeline (34) is connected between the heating water tank (31) and the heating heat exchange pipe (39), a heating circulating pump (32) and an air energy heat pump (36) are arranged on the heating water inlet pipeline (34), the air energy heat pump (36) is used for heating water, and the heating circulating pump (32) is used for circulating water; the heating water return pipeline (38) is connected between the heating water tank (31) and the heating heat exchange pipe (39) and is used for returning water; the heating medium used between the heating heat exchange pipes (39) is glycol solution in a glycol heating system (3).

3. The low-temperature type constant-temperature and constant-humidity refrigerator unit according to claim 2, wherein the concentration of the glycol solution is 25%.

4. The low-temperature type constant-temperature and constant-humidity freezer unit according to claim 1, wherein a waste heat exchanger (35) is further provided on the heating water inlet line (34), and the waste heat exchanger (35) is provided in the outdoor unit (23) and recovers waste heat of the outdoor unit (23).

5. The low-temperature type constant-temperature and constant-humidity refrigerator unit according to claim 4, wherein a waste heat control valve (33) is arranged on the water inlet side of the waste heat exchanger (35), and a heating proportional-integral valve (37) is arranged on the water inlet side of the heating heat exchange pipe (39).

6. The low-temperature type constant-temperature and constant-humidity refrigeration house unit according to claim 1, wherein the defrosting water source comprises a defrosting medium tank (43), a defrosting input pipeline and a defrosting output pipeline (46), the defrosting input pipeline is connected between the defrosting medium tank (43) and the defrosting sprayer (42), the defrosting input pipeline is provided with a defrosting circulating pump (44) and a defrosting heat exchanger (45), the defrosting circulating pump (44) and the defrosting heat exchanger (45) are arranged, and the defrosting heat exchanger (45) can exchange heat between a medium for defrosting and water in the glycol heating system (3).

7. The low-temperature type constant-temperature and constant-humidity refrigerator unit according to claim 6, wherein a defrosting medium temperature control valve (47) is arranged on a pipeline between the defrosting heat exchanger (45) and the glycol heating system (3); a defrosting proportional-integral valve (41) is provided on the inlet side of the defrosting shower (42).

8. The low-temperature type constant-temperature and constant-humidity refrigerator unit according to claim 1, wherein the refrigerator unit comprises more than two air circulation systems (1), each air circulation system (1) is provided with one refrigerating system (2), and the air circulation systems (1) and the refrigerating systems (2) are used and prepared.

Background

The cold storage is mainly used for freezing processing and cold storage of foods, medicines, machinery and electronic products, and the cold storage keeps a certain low temperature indoors through artificial refrigeration; along with the development of economy, the construction of the refrigerator is more and more, the defrosting technology of the refrigerator is continuously improved, the heat exchange efficiency is improved, and the refrigerating capacity, the food quality and the like of equipment are directly influenced by the advantages and the disadvantages of the defrosting technology and the refrigerating technology. The continuous technological progress of scientific research personnel and enterprises improves the refrigeration house continuously from the aspects of improving the heat transfer efficiency of the refrigerating device, ensuring the efficient operation of the refrigerating device, having less investment, saving energy and the like.

At present, a conventional low-temperature constant-humidity refrigerator system is composed of: the refrigeration house indoor air circulation system, the low temperature refrigerating unit system and the rotary wheel dehumidifier unit system; there are the following problems: 1) the rotary dehumidifier unit system is complex, large in size, more in air pipes and large in occupied machine room area; 2) the auxiliary heat demand of the rotary wheel dehumidification unit is large, the energy consumption of the electric heating pipe is high, and a large amount of energy consumption is consumed; 3) the refrigeration and defrosting and the auxiliary heating of the rotary wheel dehumidification unit both adopt electric heating pipes, and the long-time operation is easy to cause fire due to line aging, so that the rotary wheel dehumidification unit has great potential safety hazard; 4) if the rotary wheel dehumidification unit needs a standby system, the investment cost is multiplied; 5) the main material consumption of the rotary wheel dehumidification unit is expensive, the order period is long, the maintenance difficulty is high, and the maintenance time is long.

Disclosure of Invention

The invention solves the problems that the refrigeration dehumidification system of the refrigeration house and the refrigeration house unit in the prior art have short service life, the parts are easy to damage and not easy to maintain, and the fireproof safety coefficient is low. The heat pump replaces electric heating, parts in the refrigeration house are simplified, more temperature control parts are arranged outdoors to improve the fire protection level and safety in the refrigeration house, and the maintenance is convenient; by recycling waste heat of the refrigerating outdoor unit, the energy efficiency ratio of the refrigerator is improved in the operation process, and the operation cost of a user is reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a low-temperature type constant temperature and humidity refrigerator unit comprises:

the air circulation system comprises an air pipeline arranged in a refrigeration house, an air inlet and an air outlet of the air pipeline are both communicated with the indoor space of the refrigeration house, the air pipeline is divided into a surface cooling section, a heating section and a fan section, the surface cooling section is used for cooling air, the heating section is positioned on the air outlet side of the surface cooling section and is used for heating and controlling the temperature of the air, and a fan used for air circulation is arranged in the fan section;

the refrigeration system comprises a surface cooler, a refrigerant pipeline and an outdoor unit, wherein the surface cooler is arranged in a surface cooling section and used for air cooling, the outdoor unit is arranged outside the refrigeration house and used for heat dissipation, and the refrigerant pipeline is connected between the outdoor unit and the surface cooler and used for heat exchange between the outdoor unit and the surface cooler.

The ethylene glycol heating system comprises a heating heat exchange tube and a heating source, and the heating heat exchange tube is arranged in the heating section and is used for heating air; the hot water source is arranged outside the refrigeration house;

the defrosting system comprises a defrosting sprayer and a defrosting water source; the defrosting sprayer is arranged in the surface cooling section and used for spraying water to the surface of the surface cooler, and a defrosting water source is arranged outside the refrigeration house.

Optionally, the heating source includes a heating water tank, a heating water inlet pipeline and a heating water return pipeline; the heating water inlet pipeline is connected between the heating water tank and the heating heat exchange pipe, a heating circulating pump and an air energy heat pump are arranged on the heating water inlet pipeline, the air energy heat pump is used for heating water, and the heating circulating pump is used for circulating water; the heating water return pipeline is connected between the heating water tank and the heating heat exchange pipe and is used for returning water; the heating medium used between the heating heat exchange pipes is glycol solution in a glycol heating system.

Optionally, the concentration of the ethylene glycol solution is 25%.

Optionally, a waste heat exchanger is further arranged on the heating water inlet pipeline, and the waste heat exchanger is arranged in the outdoor unit and used for recovering waste heat of the outdoor unit.

Optionally, a waste heat control valve is arranged on the water inlet side of the waste heat exchanger, and a heating proportional-integral valve is arranged on the water inlet side of the heating heat exchange tube.

Optionally, the defrosting water source includes a defrosting medium tank, a defrosting input pipeline and a defrosting output pipeline, the defrosting input pipeline is connected between the defrosting medium tank and the defrosting sprayer, the defrosting input pipeline is provided with a defrosting circulating pump and a defrosting heat exchanger, the defrosting circulating pump and the defrosting heat exchanger, and the defrosting heat exchanger can exchange heat between a medium for defrosting and water in the glycol heating system.

Optionally, a defrosting medium temperature control valve is arranged on a pipeline between the defrosting heat exchanger and the glycol heating system; and a defrosting proportional-integral valve is arranged at the inlet side of the defrosting sprayer.

Optionally, the refrigeration house unit includes more than two air circulation systems, and each air circulation system all is provided with a refrigerating system, and air circulation system and refrigerating system all adopt one to use one and prepare for.

The invention has the beneficial effects that:

1. in the scheme, a dehumidification mode of condensing redundant moisture in the air on the surface of the surface cooler is adopted, a dehumidification mode of adopting a rotary dehumidifier in the prior art is replaced, the problems that a refrigeration house refrigeration dehumidification system and a refrigeration house unit in the prior art are short in service life, parts are easy to damage and difficult to maintain are solved, more temperature control parts are arranged outdoors by simplifying the parts in the refrigeration house, so that the maintenance is convenient, and the parts for controlling the temperature in the refrigeration house adopt heating heat exchange tubes and the surface cooler, so that the refrigeration house unit has the characteristics of simple structure and long service life, and the service life of the whole refrigeration house unit can be prolonged;

2. the heating heat sources in the scheme are all in a pressurizing heating mode, an electric heating mode is not directly used, and heat circulation adopts a heat exchanger structure, so that the waste heat and air heat energy can be fully utilized, the energy efficiency of the refrigeration house is improved, the operating cost of a user is reduced, the use of wearing parts such as an electric heater in the refrigeration house system can be avoided, and the influence of the faults of an electric heating device on the service life and the use reliability of the refrigeration house system is avoided; the fireproof safety coefficient of the refrigeration house is improved;

3. the defrosting heat exchanger in this scheme can be with the direct heat transfer of the heat in the ethylene glycol heating system to the defrosting system in to other unnecessary heat sources do not increase, thereby further avoid electric heater's use, and in the cold section of table, the defrosting is carried out to the mode that directly uses the medium to spray, and its defrosting medium can use the water, also can use the ethylene glycol.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a piping system diagram of a low-temperature type constant-temperature and constant-humidity freezer unit;

fig. 2 is a pipeline diagram of the refrigeration storage unit pipeline system added with standby equipment.

Reference numerals: 1-an air circulation system, 11-a surface cooling section, 12-a heating section, 13-a fan section, 14-an air pipeline, 2-a refrigeration system, 21-a surface cooler, 22-a refrigerant pipeline, 23-an outdoor unit, 3-an ethylene glycol heating system, 31-a heating water tank, 32-a heating circulating pump, 33-a waste heat control valve, 34-a heating water inlet pipeline, 35-a waste heat exchanger, 36-an air energy heat pump, 37-a heating proportional integral valve, 38-a heating water return pipeline, 39-a heating heat exchange pipe, 4-a defrosting system, 41-a defrosting proportional integral valve, 42-a defrosting sprayer, 43-a defrosting medium tank, 44-a defrosting circulating pump, 45-a defrosting heat exchanger, 46-a defrosting output pipeline and 47-a defrosting medium temperature control valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1, the present embodiment designs a low-temperature constant-temperature and constant-humidity freezer unit, which includes an air circulation system 1, a glycol heating system 3, and a refrigeration system 2.

The air circulation system 1 comprises an air pipeline 14 and an indoor space of a refrigeration house, the air pipeline 14 is arranged in the refrigeration house, and an air inlet and an air outlet of the air pipeline are both communicated with the indoor space of the refrigeration house; along the conveying direction of air, this air conduit 14 can be divided into table cold section 11, heating section 12 and fan section 13, and table cold section 11 is used for the air cooling, and heating section 12 is located the play wind side of table cold section 11 and is used for the air heating accuse temperature, is provided with the fan that is used for air cycle in fan section 13.

The refrigeration system 2 comprises a surface air cooler 21, a refrigerant pipeline 22 and an outdoor unit 23, wherein the surface air cooler 21 is arranged in the surface air cooling section 11 and used for cooling air, the outdoor unit 23 is arranged outside the refrigeration house and used for dissipating heat, and the refrigerant pipeline 22 is connected between the outdoor unit 23 and the surface air cooler 21 and used for heat exchange between the outdoor unit 23 and the surface air cooler 21.

The glycol heating system 3 comprises a heating heat exchange pipe 39, a heating water tank 31, a heating water inlet pipeline 34 and a heating water return pipeline 38; the heating heat exchange pipe 39 is arranged in the heating section 12 and used for heating air; the heating water inlet pipeline 34 is connected between the heating water tank 31 and the heating heat exchange pipe 39, and the heating water inlet pipeline 34 is connected with the heating circulating pump 32, the waste heat control valve 33, the waste heat exchanger 35, the air energy heat pump 36 and the heating proportional-integral valve 37 in sequence. The heating water return line 38 is connected between the heating water tank 31 and the heating heat exchange tube 39 and returns water. The air energy heat pump 36 is used for heating water, and the heating circulating pump 32 is used for circulating water; the waste heat exchanger 35 is provided in the outdoor unit 23 and recovers waste heat of the outdoor unit 23. The medium in the glycol heating system 3 can be an aqueous medium or other antifreeze medium, such as glycol.

The heating circulating pump 32, the waste heat control valve 33, the waste heat exchanger 35, the air energy heat pump 36, the heating proportional-integral valve 37 and the heating water tank 31 can be installed outdoors of the refrigeration house as heating sources of the ethylene glycol heating system 3.

The refrigeration system 2 in the embodiment utilizes the refrigeration principle of an air conditioner and carries out heat exchange and temperature reduction on the air in the refrigeration house at the surface air cooler 21; in addition, the cold air in the heating section 12 is heated to a set temperature, so that the cold air at the set temperature is blown out, the whole temperature control in the freezer is realized by controlling the air heat exchange speed through a fan in the scheme, and the indoor air neutralization and temperature reduction are not performed through the refrigerating air lower than the set temperature; the arrangement of the glycol heating system 3 can avoid the damage of the refrigerated goods in the refrigeration house caused by the overcooled airflow generated by the surface air cooler 21.

In the system of the embodiment, the heat source for heating the indoor air is the waste heat on the outdoor unit 23 and the air energy heat pump 36, so that the wearing parts such as the electric heater are avoided being used, the main parts in the cold storage room in the system are the heating heat exchange tube 39 and the surface air cooler 21 which are both in heat exchange structures, the service life is long, and other parts of the system are in the outdoor normal temperature environment, so that the damage of the wearing parts in the low temperature environment of the cold storage room is avoided.

In addition, the temperature control of the system is realized by the loss control of media through corresponding valves, so that the upper limit and the lower limit of a controllable temperature and humidity threshold are higher, the temperature in a cold storage is-5-10 ℃, and the relative humidity is adjusted randomly between 40% and 60%; the equipment runs stably and has high corresponding speed, and after goods in and out of the refrigeration house are loaded and unloaded, the temperature and the humidity in the refrigeration house can be quickly adjusted, so that the influence on the storage of the goods due to the fact that the temperature and the humidity exceed the set range is reduced to the maximum extent, and the qualification rate of the goods stored in the refrigeration house is improved; meanwhile, as the traditional heating equipment such as an electric heater and the like is not used, the system improves the fire-proof grade of the refrigeration house; by carrying out heat recovery on the refrigeration outdoor unit 23, the energy consumption of system operation is reduced, and energy conservation is realized

Example 2

As shown in fig. 1, the low-temperature constant-temperature and constant-humidity freezer unit according to the present embodiment further includes a defrosting system 4 on the basis of the structure of embodiment 1.

The defrost system 4 includes a defrost sprayer 42 and a defrost water source; the defrosting shower 42 is provided in the surface cooling section 11 and is used to spray water to the surface of the surface cooler 21, and the defrosting water source is provided outside the freezer compartment.

The defrosting water source comprises a defrosting medium tank 43, a defrosting input pipeline and a defrosting output pipeline 46, the defrosting input pipeline is connected between the defrosting medium tank 43 and the defrosting sprayer 42, a defrosting circulating pump 44 and a defrosting heat exchanger 45 are arranged on the defrosting input pipeline, the defrosting circulating pump 44 and the defrosting heat exchanger 45 are arranged on the defrosting input pipeline, and the defrosting heat exchanger 45 can exchange heat between a medium for defrosting and water in the glycol heating system 3; the defrosting heat exchanger 45 comprises a heat absorption channel and a heat release channel, wherein two ends of the heat release channel are respectively connected to the heating water inlet pipeline 34 and the heating water return pipeline 38, and two ends of the heat absorption channel are respectively connected to the defrosting output pipeline 46 and the defrosting input pipeline; the inlet side of the heat release channel is connected to the heating inlet line 34 through a defrost medium temperature control valve 47.

A defrosting medium temperature control valve 47 is arranged on a pipeline between the defrosting heat exchanger 45 and the glycol heating system 3; a defrosting proportional-integral valve 41 is provided on the inlet side of the defrosting shower 42.

The defrosting heat exchanger 45 can directly exchange heat of heat in the glycol heating system 3 to the defrosting system 4 without adding other redundant heat sources, so that the use of an electric heater is further avoided, and in the surface cooling section 11, defrosting is directly carried out in a medium spraying mode, wherein the defrosting medium can use water or glycol; in addition, most parts of the defrosting system 4 can be arranged outdoors, so that the maintenance and the repair are convenient, and the outdoor parts are used at normal temperature, so that accessories in special environment do not need to be purchased, and the manufacturing cost of the system is reduced.

Example 3

As shown in fig. 2, on the basis of the structure of embodiment 1 or embodiment 2, the low-temperature constant-humidity freezer unit of this embodiment may include more than two air circulation systems 1, and each air circulation system 1 is provided with one refrigeration system 2; the ethylene glycol heating system 3 is provided with two parallel heating circulating pumps 32, two parallel waste heat exchangers 35 and two parallel air energy heat pumps 36. The defrost system 4 employs two parallel defrost circulation pumps 44. The two waste heat exchangers 35 and the two air energy heat pumps 36 are respectively arranged in parallel, so that the fault tolerance rate of the equipment is improved, the heat exchangers are provided with the upper limit of the heat exchange speed, and the heat exchangers and the circulating pump are provided with the upper limit of the operation, so that the upper limit of the other heat exchanger can be reached, the other heat exchanger is used as a main parameter for temperature and humidity regulation, and the difficulty in controlling the temperature of the non-electric heating refrigeration house unit is reduced.

The above examples are merely examples for clarity of description and are not intended to limit the embodiments; other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.