CN210861859U - Defrosting system of refrigeration house - Google Patents
Defrosting system of refrigeration house Download PDFInfo
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- CN210861859U CN210861859U CN201921706382.4U CN201921706382U CN210861859U CN 210861859 U CN210861859 U CN 210861859U CN 201921706382 U CN201921706382 U CN 201921706382U CN 210861859 U CN210861859 U CN 210861859U
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Abstract
The utility model discloses a defrosting system of a refrigeration house, which comprises an air cooler (1); the upper end port of the air cooler is communicated with the second port of the four-way reversing valve (4); the first port of the four-way reversing valve is communicated with an exhaust port of the compressor (2); the air inlet of the compressor is communicated with the fourth port of the four-way reversing valve; the third port of the four-way reversing valve is respectively connected with one end of the first electromagnetic valve (8) and one end of the second electromagnetic valve (9); the other end of the first electromagnetic valve is communicated with a refrigerant inlet at the top of the heat accumulator (6); a refrigerant outlet at the bottom of the heat accumulator is communicated with a refrigerant inlet at the top of the outdoor heat exchanger (7) through a connecting pipeline which is sequentially provided with a fourth electromagnetic valve and a fifth electromagnetic valve; and a refrigerant outlet at the bottom of the outdoor heat exchanger is communicated with a lower end interface of the air cooler through a thermal expansion valve (5). The utility model discloses can improve the defrosting heat transfer volume that gets into the air-cooler, reduce the fluctuation of storehouse temperature.
Description
Technical Field
The utility model relates to a freezer defrosting technical field especially relates to a freezer defrosting system.
Background
The cold storage is a refrigeration device with wide application and is also an infrastructure in the refrigeration industry. The good running performance of the refrigeration house not only guarantees the quality of stored goods, but also can reduce the proportion of the energy consumption of the refrigeration house in the total power consumption. At present, the energy consumption and waste in the refrigeration industry of China are very serious. The defrosting is an essential link in the operation of the refrigeration house, and the energy consumption of defrosting accounts for about 20% of the total energy consumption of the refrigeration house.
The defrosting mode adopted by the cold storage is mainly electric heating defrosting and hot air defrosting at present. Among them, the electric heating defrosting is a defrosting method with simple control, and its application is limited due to low heat utilization rate in the defrosting process and large fluctuation of the storage temperature. The reverse cycle defrosting is one of hot air defrosting, and during defrosting, an air cooler in an warehouse is used as a condenser, and an outdoor heat exchanger is used as an evaporator. Because the indoor cooling fans such as the air cooler in the refrigerator and the like mostly adopt open equipment, the heat of defrosting can be diffused into the refrigerator in a natural convection mode, and the temperature of the refrigerator is increased.
In addition, if the refrigeration house is used in a low-temperature environment, the outdoor heat exchanger is used as an evaporator, during defrosting, the suction pressure of the compressor is low, so that the defrosting energy source is insufficient, the defrosting time is prolonged, and even the compressor is stopped in severe cases.
Therefore, there is an urgent need to develop a technology that can solve the problems of large storage temperature fluctuation and insufficient defrosting energy caused by reverse cycle defrosting while ensuring stable and efficient operation of the refrigeration storage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a freezer defrosting system to the technical problem that prior art exists.
Therefore, the utility model provides a defrosting system of a refrigeration house, which comprises an air cooler;
the upper end port of the air cooler is communicated with the second port b of the four-way reversing valve;
the first port a of the four-way reversing valve is communicated with an exhaust port of the compressor;
the air inlet of the compressor is communicated with the fourth port d of the four-way reversing valve;
the third port c of the four-way reversing valve is respectively connected with one end of the first electromagnetic valve and one end of the second electromagnetic valve;
the other end of the first electromagnetic valve is communicated with a refrigerant inlet at the top of the heat accumulator;
a refrigerant outlet at the bottom of the heat accumulator is communicated with a refrigerant inlet at the top of the outdoor heat exchanger through a connecting pipeline which is sequentially provided with a fourth electromagnetic valve and a fifth electromagnetic valve;
the refrigerant outlet at the bottom of the outdoor heat exchanger is communicated with the lower end interface of the air cooler through a thermostatic expansion valve.
Wherein, a gas-liquid separator is arranged on a connecting pipeline between the air inlet of the compressor and the fourth port d of the four-way reversing valve.
A temperature sensing bulb is arranged on a connecting pipeline between the upper end port of the air cooler and the second port b of the four-way reversing valve;
the temperature sensing bulb is connected with the thermostatic expansion valve through a signal line.
The other end of the second electromagnetic valve is connected with a connecting pipeline between the fourth electromagnetic valve and the fifth electromagnetic valve;
the other end of the second electromagnetic valve is also connected with a connecting pipeline between the thermostatic expansion valve and the outdoor heat exchanger through a third electromagnetic valve.
Wherein, the surface of the heat accumulator is covered with a heat insulation material, and the heat insulation material is a polyethylene foam material.
Wherein, the refrigerator comprises a hollow cold storage body;
a support is arranged inside the cold storage body;
a cold accumulation plate is arranged at the top of the bracket;
the air cooler is arranged on the inner side of the top of the cold storage body;
the cold accumulation plate is positioned right on the left of the air outlet on the air cooler.
By the above the technical scheme provided by the utility model it is visible, compare with prior art, the utility model provides a freezer defrosting system, it is through increasing the heat accumulator, the heat of evaporimeter and compressor acting when with the freezer operation is stored, under reverse circulation defrosting mode, the heat that utilizes to store in the heat accumulator is to the refrigerant heating before the compressor entry, has improved the defrosting heat transfer volume that gets into the air-cooler, when having reduced the defrosting time, has reduced the fluctuation of storehouse temperature, is favorable to popularizing and applying, has the production practice meaning of great weight.
Additionally, the utility model discloses an at the cold-storage board of storehouse top installation, when defrosting, can absorb the heat that spreads to the storehouse in from the air-cooler, further reduce the fluctuation of storehouse temperature, reduced next cycle cold load, saved the energy, improve the storage quality of freezer goods.
Drawings
Fig. 1 is a schematic view of a connection structure of a defrosting system of a refrigeration storage provided by the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a defrosting system of a refrigerator provided by the present invention when the defrosting system is installed on a refrigerator;
in the figure: the system comprises a compressor, a gas-liquid separator, a four-way reversing valve, a thermal expansion valve, a heat accumulator, a heat exchanger, an outdoor heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve and a heat exchanger, wherein the 1 is an air cooler, the 2 is the compressor, the 3 is the gas-liquid separator, the 4 is the four-way reversing valve, the 5 is the thermal expansion valve, the 6 is;
14 is a cold storage plate, 15 is a cold storage body, and 16 is a support;
20 is a thermal bulb, and 100 is an air outlet.
Detailed Description
In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 and 2, the utility model provides a defrosting system for a refrigeration house, which comprises an air cooler 1;
an upper end port of the air cooler 1 (namely an upper end port of a heat exchange tube in the air cooler 1) is communicated with a second port b of the four-way reversing valve 4;
the first port a of the four-way reversing valve 4 is communicated with an exhaust port of the compressor 2;
the air inlet of the compressor 2 is communicated with the fourth port d of the four-way reversing valve 4;
the third port c of the four-way reversing valve 4 is respectively connected with one end of the first electromagnetic valve 8 and one end of the second electromagnetic valve 9;
the other end of the first electromagnetic valve 8 is communicated with a refrigerant inlet at the top of the heat accumulator 6;
a refrigerant outlet at the bottom of the heat accumulator 6 is communicated with a refrigerant inlet at the top of the outdoor heat exchanger 7 through a connecting pipeline which is sequentially provided with a fourth electromagnetic valve 11 and a fifth electromagnetic valve 12;
the refrigerant outlet at the bottom of the outdoor heat exchanger 7 is communicated with the lower end interface of the air cooler 1 (namely the lower end interface of the heat exchange tube in the air cooler 1) through a thermal expansion valve 5.
The utility model discloses in, on specifically realizing, on the connecting tube between the air inlet of compressor 2 and the fourth port d of four-way reversing valve 4, be provided with vapour and liquid separator 3.
In the utility model, in the concrete implementation, a temperature sensing bulb 20 is arranged on a connecting pipeline between the upper end interface of the air cooler 1 and the second port b of the four-way reversing valve 4;
the temperature sensing bulb 20 is connected with the thermostatic expansion valve 5 through a signal line.
In the present invention, in particular, the other end of the second solenoid valve 9 is connected to the connection pipe between the fourth solenoid valve 11 and the fifth solenoid valve 12;
the other end of the second electromagnetic valve 9 is also connected with a connecting pipeline between the thermostatic expansion valve 5 and the outdoor heat exchanger 7 through a third electromagnetic valve 10.
The utility model discloses in, heat accumulator 6 can be current phase change heat accumulator, and the heat accumulation material of its interior adoption can be paraffin. In the concrete implementation, the heat accumulator 6 can be a three-sleeve type phase change heat accumulator in which the existing phase change material is paraffin.
In particular, the surface of the heat accumulator 6 is covered with a heat insulation material, and the heat insulation material can be a polyethylene foam material;
specifically, the heat accumulator 6 is provided with a temperature controller, which monitors the temperature in the heat accumulator 6 in real time through a temperature sensor, and correspondingly switches different solenoid valves (e.g., a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, etc.) according to different temperature setting values.
In the specific implementation of the present invention, referring to fig. 2, the freezer comprises a hollow freezer body 15;
a support 16 is arranged in the cold storage body 15;
the top of the bracket 16 is provided with a cold accumulation plate 14;
the air cooler 1 is arranged on the inner side of the top of the refrigeration house body 15;
the cold accumulation plate 14 is located right to the left of the air outlet 100 on the air cooler 1.
In concrete realization, the actual height of support 16 is less than the inside height of the cold storage body 15, is convenient for place cold-storage plate 14 on the support, and places cold-storage plate 14 after, and 3 ~ 5 cm's clearance will be left apart from the storehouse top of the cold storage body 15 to cold-storage plate 14, heat transfer area when can increase cold-storage plate 14 defrosting like this.
In concrete realization, the support 16 can adopt a hollowed-out iron frame and a hollowed-out support, and the influence on the air flow structure of the refrigeration house is reduced, and meanwhile, the heat exchange area of the cold accumulation plate during defrosting can be increased.
The utility model discloses in, on specifically realizing, air-cooler 1 can choose for use "ya tong" tablet air-cooler of the ya tong refrigeration air conditioning equipment limited company production in Tianjin city. Certainly, can also be and satisfy the utility model discloses design requirement's other air-coolers.
The utility model discloses in, in the concrete realization, outdoor heat exchanger 7, the model that can choose for use is the finned heat exchanger of Tianjin City ya tong refrigeration air conditioning equipment limited company production. Certainly, can also be the other fin type heat exchangers who satisfies the utility model discloses the design requirement.
In the present invention, in the concrete implementation, the compressor 2 is a compressor of the type C-L228F, the type of which is SANYO (SANYO).
The utility model discloses in, in the concrete realization, cold-storage plate 14 can choose for use the cold-storage plate that the good cold-stored limited company brand of Guangzhou is good cold (Gailen), the model is GL-900G, and the material of this cold-storage plate is the PE material, and freezing temperature is-12 ℃ - ~ -18 ℃.
In the present invention, in the concrete implementation, the cold storage plate 14 can be a freezing cold storage plate with a size of 230mm × 180mm × 25 mm.
It should be noted that, in the freezer defrosting system of the present invention, the air cooler 1, the thermal expansion valve 5, the cold storage plate 14, the support 16, and the temperature sensing bulb 20 are included in the freezer storage body 15, and the compressor 2, the liquid storage device 3, the heat storage device 6, the outdoor heat exchanger 7, and other modules are installed outside the freezer storage body 15.
It should be noted that, in the present invention, each main module functions as follows:
the air cooler 1 functions as follows: reduce the temperature and humidity in the cold storage
The compressor 2 functions as: the lower pressure and temperature refrigerant vapor is compressed to a higher pressure and temperature refrigerant vapor.
The reservoir 3 functions as: stores the refrigerant, performs gas-liquid separation, and protects the compressor 2.
The thermal expansion valve 5 functions as: throttling and reducing pressure.
The heat accumulator 6 functions as: in the cooling and heat storage mode, the heat generated by the compressor 2 is stored and recovered to facilitate defrosting.
The outdoor heat exchanger 7 functions as: in the cooling-only mode, heat generated by the compressor 2 is discharged to the outdoor environment.
The function of the cold storage plate 14 is: during defrosting, the heat diffused from the air cooler 1 to the interior of the refrigerator can be absorbed, the fluctuation of the temperature of the refrigerator is reduced, the cold load of the next period is reduced, the energy is saved, and the storage quality of goods in the refrigerator is improved.
It should be noted that, to the utility model discloses, during the normal operating of freezer, open through controlling first solenoid valve 8, third solenoid valve 10, fourth solenoid valve 11, second solenoid valve 9, fifth solenoid valve 12 are closed, pass through pipeline formation series circuit with air-cooler 1, compressor 2, reservoir, heat accumulator 6 and thermal expansion valve 5, when providing cold volume for the freezer, retrieve the heat that compressor 2 discharged.
It should be noted that, in the present invention, any two parts that are connected to each other through a hollow connecting pipe, as shown in fig. 1.
In order to illustrate the technical solution of the present invention more clearly, the following describes the specific working process of the present invention in detail.
When the refrigeration house system operates in a refrigeration mode, the first electromagnetic valve 8, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are opened through control, and the second electromagnetic valve 9 and the fifth electromagnetic valve 12 are closed. The air cooler 1, the compressor 2, the liquid storage device 3, the heat accumulator 6 and the thermal expansion valve 5 form a series loop through pipelines, and when cold energy is provided for the refrigeration house, heat discharged by the compressor 2 is recovered through the heat accumulator. This is a refrigeration and heating mode;
when the temperature in the heat accumulator reaches the temperature set by the temperature controller, the second electromagnetic valve 9 and the fifth electromagnetic valve 12 are opened through control, and the first electromagnetic valve 8, the third electromagnetic valve 10 and the fourth electromagnetic valve 11 are closed. The air cooler 1, the compressor 2, the liquid storage device 3, the outdoor heat exchanger 7 and the thermostatic expansion valve 5 form a series loop through pipelines, and at the moment, heat discharged by the compressor 2 is released to the environment through the outdoor heat exchanger, so that the mode is an independent refrigeration mode.
In the operation process of the refrigeration house, once the temperature in the heat accumulator is reduced below the set value of the temperature controller, the refrigeration house can be controlled to operate again in a refrigeration and heat accumulation mode.
For the utility model discloses, when indoor air-cooler frost layer thickness reached the defrosting requirement, the third port c and the fourth port d of four-way reversing valve were linked together this moment, and first port an and second port b are linked together, through control, close second solenoid valve 9 and third solenoid valve 10, open first solenoid valve 8, fourth solenoid valve 11 and fifth solenoid valve 12. At this time, the high-temperature and high-pressure refrigerant coming out of the compressor 2 enters the air cooler 1 for defrosting, enters the outdoor heat exchanger 7 for evaporation and heat absorption after being throttled by the thermostatic expansion valve 5, and then enters the heat accumulator 6, the temperature of the refrigerant is continuously increased, so that the suction pressure at the inlet of the compressor 2 is increased, and the flow rate of the refrigerant is increased. And then the refrigerant enters the compressor 2 for temperature rise and pressure rise, and then enters the air cooler 1 for defrosting. As the refrigerant is supplemented with a high-temperature low-temperature heat source in the heat accumulator 6, the heat of defrosting entering the air cooler 1 is sufficient, and the defrosting time is shortened.
To sum up, compare with prior art, the utility model provides a pair of freezer defrosting system, it is through increasing the heat accumulator, and the heat of evaporimeter and compressor acting is stored when with the freezer operation, under the reverse cycle defrosting mode, utilizes the heat of storing in the heat accumulator to the refrigerant heating before the compressor entry, has improved the defrosting heat transfer volume that gets into the air-cooler, when having reduced the defrosting time, has reduced the fluctuation of storehouse temperature, is favorable to popularizing and applying, has the meaning of great production practice.
Additionally, the utility model discloses an at the cold-storage board of storehouse top installation, when defrosting, can absorb the heat that spreads to the storehouse in from the air-cooler, further reduce the fluctuation of storehouse temperature, reduced next cycle cold load, saved the energy, improve the storage quality of freezer goods.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A defrosting system of a refrigeration house is characterized by comprising an air cooler (1);
the upper end port of the air cooler (1) is communicated with the second port b of the four-way reversing valve (4);
the first port a of the four-way reversing valve (4) is communicated with an exhaust port of the compressor (2);
the air inlet of the compressor (2) is communicated with the fourth port d of the four-way reversing valve (4);
a third port c of the four-way reversing valve (4) is respectively connected with one end of the first electromagnetic valve (8) and one end of the second electromagnetic valve (9);
the other end of the first electromagnetic valve (8) is communicated with a refrigerant inlet at the top of the heat accumulator (6);
a refrigerant outlet at the bottom of the heat accumulator (6) is communicated with a refrigerant inlet at the top of the outdoor heat exchanger (7) through a connecting pipeline which is sequentially provided with a fourth electromagnetic valve (11) and a fifth electromagnetic valve (12);
the refrigerant outlet at the bottom of the outdoor heat exchanger (7) is communicated with the lower end interface of the air cooler (1) through a thermostatic expansion valve (5).
2. The freezer defrosting system according to claim 1, characterized in that a vapor-liquid separator (3) is arranged on a connecting pipeline between the air inlet of the compressor (2) and the fourth port d of the four-way reversing valve (4).
3. The freezer defrosting system according to claim 1, characterized in that a temperature bulb (20) is arranged on a connecting pipeline between the upper port of the air cooler (1) and the second port b of the four-way reversing valve (4);
the temperature sensing bulb (20) is connected with the thermostatic expansion valve (5) through a signal line.
4. The freezer defrosting system according to claim 1, characterized in that the other end of the second solenoid valve (9) is connected with a connecting pipeline between the fourth solenoid valve (11) and the fifth solenoid valve (12);
the other end of the second electromagnetic valve (9) is also connected with a connecting pipeline between the thermostatic expansion valve (5) and the outdoor heat exchanger (7) through a third electromagnetic valve (10).
5. Freezer defrosting system according to claim 1, characterized in that the surface of the heat accumulator (6) is covered with a thermal insulation material, which is a polyethylene foam material.
6. The freezer defrosting system of claim 1 comprising a hollow freezer body (15);
a bracket (16) is arranged in the cold storage body (15);
a cold accumulation plate (14) is arranged at the top of the bracket (16);
the air cooler (1) is arranged on the inner side of the top of the refrigeration house body (15);
the cold accumulation plate (14) is positioned at the right left side of the air outlet (100) on the air cooler (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706382.4U CN210861859U (en) | 2019-10-12 | 2019-10-12 | Defrosting system of refrigeration house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706382.4U CN210861859U (en) | 2019-10-12 | 2019-10-12 | Defrosting system of refrigeration house |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210861859U true CN210861859U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921706382.4U Expired - Fee Related CN210861859U (en) | 2019-10-12 | 2019-10-12 | Defrosting system of refrigeration house |
Country Status (1)
| Country | Link |
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| CN (1) | CN210861859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820091A (en) * | 2021-09-06 | 2021-12-21 | 清华大学合肥公共安全研究院 | Environmental wind tunnel and ice and snow melting method thereof |
-
2019
- 2019-10-12 CN CN201921706382.4U patent/CN210861859U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820091A (en) * | 2021-09-06 | 2021-12-21 | 清华大学合肥公共安全研究院 | Environmental wind tunnel and ice and snow melting method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 Termination date: 20211012 |