CN204594034U - Natural cooling source air conditioning display cabinet system - Google Patents

Abstract

The utility model discloses a natural cold source combined cooling display cabinet system, which comprises at least one cooling cycle system, and each cooling cycle system includes a cooling capacity storage and adjustment system, at least two parallel-connected refrigerators, Outdoor fresh air ducts, air supply ducts, return air ducts, exhaust ducts, air supply chamber connecting pipes and exhaust chamber connecting pipes, the outdoor fresh air pipes are connected to the air inlet of the cooling capacity storage and adjustment system, and the cooling capacity storage and adjustment system The air outlet is connected to the air supply pipe, the input end of the air supply chamber connecting pipe is connected to the air supply pipe, the output end is connected to the air supply chamber of the refrigerator, the input end of the air exhaust chamber connecting pipe is connected to the return air chamber of the refrigerator, and the output end is connected to the return air chamber of the refrigerator. The air duct is connected, and the output end of the return air duct is connected with the return air outlet of the cooling capacity storage and adjustment system. The natural cold source combined cooling display cabinet system of the utility model can well solve the problem of high energy consumption of the display cabinet, store cold in different regions, different seasons, time and periods, and achieve energy-saving benefits.

Description

Natural cold source combined cooling display cabinet system

technical field

The utility model relates to a refrigeration device, in particular to a natural cold source combined cooling display cabinet system.

Background technique

According to a survey by the China Business Association, in a typical supermarket, refrigeration equipment consumes 60% of the total electricity consumption. The display cabinet is the main part of the supermarket's electricity consumption, and its energy consumption accounts for more than half of the supermarket's electricity consumption. The huge energy consumption of refrigerated display cabinets has compressed the profit margins of supermarkets. In order to reduce operating costs, some supermarket refrigerated display cabinets did not operate in accordance with the refrigeration requirements, resulting in repeated occurrences of food deterioration. Therefore, under the premise of ensuring food quality, the energy-saving operation of refrigerated display cabinets is more important.

The use of outdoor natural cold sources for refrigerated display cabinet systems has been carried out in recent years. Shi Haijun proposed to use natural cold sources in winter for display cabinets and its control strategy. Chen Tianji studied the comparison between natural cold sources and traditional cold sources. Showcases reduce the energy consumption of refrigeration systems.

The natural cold source has achieved certain results in the application of display cabinets, but due to the limitation of its outdoor ambient temperature and complex control logic, it has been restricted in its application and promotion. Therefore, aiming at the problem of high energy consumption of the refrigerated showcase, this patent proposes a refrigerated and refrigerated showcase with a cold storage device utilizing an outdoor natural cold source. Temperature is a key factor affecting the growth of microorganisms in refrigerated food, which determines the quality and safety of food. Most of the current food poisoning incidents are caused by the fact that the temperature of the food is higher than the temperature required for storage, especially the temperature in the refrigerated display cabinet at the end of the cold chain cannot meet the freezing and refrigerating requirements. In order to ensure food safety, it is very necessary and urgent to ensure that the temperature of food is below the storage temperature.

Utility model content

The technical problem to be solved by the utility model is to provide a natural cold source combined cooling showcase system, which can well solve the problem of high energy consumption of the showcase .

The technical scheme adopted by the natural cold source combined cooling display cabinet system of the utility model is as follows:

The utility model natural cold source combined cooling display cabinet system includes at least one cooling cycle system, and each cooling cycle system includes a cooling capacity storage and adjustment system, at least two parallel connected refrigerators, outdoor fresh air pipes, The air supply duct, the return air duct, the exhaust duct, the connecting pipe of the air supply chamber and the connecting pipe of the exhaust chamber, the outdoor fresh air pipe is connected with the air inlet of the cooling capacity storage and adjustment system, the air outlet of the cooling capacity storage and adjustment system is connected with the air supply The air duct is connected, the input end of the air supply chamber connecting pipe is connected with the air supply pipe, the output end is connected with the air supply chamber of the refrigerator, the input end of the air exhaust chamber connecting pipe is connected with the return air chamber of the refrigerator, and the output end is connected with the return air pipe. The output end of the return air duct is connected with the air return port of the cold capacity storage and adjustment system, and the exhaust duct is connected with the air outlet of the cold capacity storage and adjustment system. The outdoor air flows into the cooling capacity storage and adjustment system through the outdoor fresh air duct, and the outdoor intake air is stored cold through the cooling capacity storage and adjustment system. Into the air supply cavity of the freezer, the air flow entering the air supply cavity is sent out from the air supply port, and then enters the return air cavity through the air return port of the freezer, and flows into the return air duct through the exhaust cavity connecting pipe connected with the return air cavity In the channel, it is discharged from the exhaust duct through the cold storage and adjustment system to form a cycle.

As a preferred solution of the present invention, there are two cooling circulation systems, and the two cooling circulation systems are respectively a refrigeration supply circulation system for refrigerated showcases and a refrigeration supply circulation system for refrigerated showcases. By setting the cooling circulation system as a cooling circulation system for refrigerated showcases and a cooling circulation system for refrigerated showcases, multiple refrigerated showcases and refrigerated showcases can be simultaneously cooled to further save cooling costs.

As a preferred solution of the present utility model, the refrigerated display cabinet cooling circulation system includes a cold storage and adjustment system, at least two refrigerated display cabinets connected in parallel, a first outdoor fresh air duct, a first air supply duct, a first The air duct, the first exhaust duct, the connecting pipe of the first air supply chamber and the connecting pipe of the first row of air chamber, the first outdoor fresh air duct are connected with the air inlet of the cooling capacity storage and adjustment system, and the outlet of the cooling capacity storage and adjustment system The tuyere is connected to the first air supply pipe, the input end of the connecting pipe of the first air supply chamber is connected to the first air supply pipe, the output end is connected to the air supply chamber of the refrigerated showcase, and the input end of the connecting pipe of the first row of air chamber is connected to the refrigerator The return air cavity of the showcase is connected, the output end is connected with the first return air duct, the output end of the first return air duct is connected with the return air outlet of the cooling capacity storage and adjustment system, the first exhaust duct is connected with the cooling capacity storage and adjustment system The exhaust vent is connected. The outdoor air flows into the cooling capacity storage and adjustment system through the first outdoor fresh air duct, and the outdoor intake air is stored cold through the cooling capacity storage and adjustment system. The connecting pipe of the air cavity is sent into the air supply cavity of the refrigerated display cabinet, and the air flow entering the air supply cavity of the refrigerated display cabinet is sent out from the air supply port, and then enters the return air cavity through the return air port of the refrigerated display cabinet. The connecting pipe of the first air exhaust chamber connected with the air return cavity flows into the first air return duct, and then is discharged from the first exhaust duct through the cooling capacity storage and adjustment system, forming a circulation.

As a preferred solution of the present utility model, the refrigerated display cabinet cooling cycle system includes a cooling capacity storage and adjustment system, at least two refrigerated display cabinets connected in parallel, a second outdoor fresh air duct, a second air supply duct, a second circuit The air duct, the second exhaust duct, the connecting pipe of the second air supply chamber and the connecting pipe of the second exhaust chamber, the second outdoor fresh air duct are connected with the air inlet of the cooling capacity storage and adjustment system, and the outlet of the cooling capacity storage and adjustment system The tuyere is connected with the second air supply pipe, the input end of the connecting pipe of the second air supply chamber is connected with the second air supply pipe, the output end is connected with the air supply chamber of the refrigerating showcase, and the input end of the connecting pipe of the second row of air chamber is connected with the freezer. The return air cavity of the showcase is connected, the output end is connected with the second return air duct, the output end of the second return air duct is connected with the return air outlet of the cooling capacity storage and adjustment system, the second exhaust duct is connected with the cooling capacity storage and adjustment system The exhaust vent is connected. The outdoor air flows into the cooling capacity storage and adjustment system through the second outdoor fresh air duct, and the outdoor intake air is stored cold through the cooling capacity storage and adjustment system. The connecting pipe of the air cavity is sent into the air supply cavity of the refrigerated display cabinet, and the air flow entering the air supply cavity of the refrigerated display cabinet is sent out from the air supply port, and then enters the return air cavity through the return air port of the refrigerated display cabinet. The connecting pipe of the second exhaust chamber connected with the return air cavity flows into the second return air duct, and then is discharged from the second exhaust duct through the cooling capacity storage and adjustment system, forming a circulation.

As a preferred solution of the present utility model, the cold storage and adjustment system includes a cold storage device, a static pressure tank, a first air duct, a second air duct, a third air duct, a fourth air duct, a fifth air duct and a first air duct. Six air pipes, the first air pipe and the second air pipe are connected in parallel with the outdoor fresh air pipe, the static pressure box is respectively connected with the first air pipe air supply pipe and the third air pipe, and the cold storage device is respectively connected with the second air pipe and the second air pipe The four air pipes are connected, the fourth air pipe and the third air pipe are respectively connected with the fifth air pipe, the two ends of the fifth air pipe are respectively connected with the return air pipe and the exhaust air pipe, and the sixth air pipe is arranged in the cold storage device Between the first air pipe, the first air pipe, the second air pipe, the third air pipe, the fourth air pipe, the fifth air pipe and the sixth air pipe are provided with valves. The cold storage and adjustment system can adjust the ratio of supply and return air to meet the storage temperature requirements.

As a preferred solution of the present utility model, the cold storage device is a cold storage device for refrigeration or a cold storage device for freezing. By setting the cold storage device as a cold storage device or a cold storage device, the cold storage device may be suitable for cold storage of refrigerated showcases, and the cold storage device may be suitable for cold storage of frozen showcases.

As a preferred solution of the present utility model, an air purification device is provided on the first outdoor fresh air duct and the second outdoor fresh air duct, and by setting the air purification device on the first outdoor fresh air duct and the second outdoor fresh air duct, the air purification device The outdoor fresh air can be filtered, so that the air flow entering the freezer has a high degree of cleanliness.

As a preferred solution of the present utility model, the first outdoor fresh air duct and the second outdoor fresh air duct are provided with a first sensor for detecting the temperature of the outdoor fresh air, and both the refrigerated display cabinet and the refrigerated display cabinet are provided with a second sensor for detecting the temperature inside the cabinet. For the second sensor, a third sensor for detecting return air temperature is arranged on both the first return air duct and the second return air duct. The first sensor for detecting the temperature of the outdoor fresh air, the second sensor for detecting the temperature inside the cabinet, and the third sensor for detecting the temperature of the return air coordinately control the start and stop of the compressor in the freezer and the air intake of the outdoor fresh air to supply cooling to the display cabinet to achieve energy saving benefit.

As a preferred solution of the present invention, both the first air supply duct and the second air supply duct are provided with an air supply motor, and both the first air return duct and the second air return duct are provided with a return air motor. The air supply motor and the return air motor play the role of diverting and pressurizing the air flow.

As a preferred solution of the utility model, air valves are arranged on the outdoor fresh air duct, the air supply duct, the connecting pipe of the air supply chamber, the connecting pipe of the return air chamber, the return air duct and the exhaust duct. The air valve arranged on the outdoor fresh air pipeline can automatically adjust the outdoor fresh air and return air volume according to the temperature in the freezer cabinet, so as to ensure the storage temperature of the food in the display cabinet.

To sum up, the advantage of the utility model natural cold source combined cooling display cabinet system is that it can well solve the problem of high energy consumption of the display cabinet, store cold in different regions, in different seasons, at different times and in different periods, to achieve Energy saving benefits.

Description of drawings

Fig. 1 is the basic structural diagram of the natural cold source combined cooling display cabinet system of the present invention.

Fig. 2 is a basic structural diagram of the cold storage and adjustment system of the natural cold source combined cooling display cabinet system of the present invention.

Detailed ways

As shown in Figures 1 and 2, the natural cold source combined cooling display cabinet system of the present invention includes at least one cooling cycle system, and each cooling cycle system includes a cold storage and adjustment system 1, at least two Freezers, outdoor fresh air ducts, air supply ducts, return air ducts, exhaust ducts, air supply cavity connecting pipes and exhaust cavity connecting pipes connected in parallel, outdoor fresh air ducts, air supply ducts, air supply cavity connecting pipes, return air Air valves are arranged on the return air duct and the exhaust air duct of the chamber connecting pipe. The outdoor fresh air pipe is connected to the air inlet of the cold storage and adjustment system 1, the air outlet of the cold storage and adjustment system is connected to the air supply pipe, the input end of the connecting pipe of the air supply cavity is connected to the air supply pipe, and the output end is connected to the air supply pipe of the refrigerator. The air cavity is connected, the input end of the exhaust cavity connecting pipe is connected with the return air cavity of the refrigerator, the output end is connected with the return air duct, the output end of the return air duct is connected with the return air port of the cold storage and adjustment system 1, and the exhaust duct is connected with the The cold storage is connected with the air outlet of the regulating system 1 . The outdoor air flows into the cooling capacity storage and adjustment system 1 through the outdoor fresh air duct, and the outdoor intake air is stored cold through the cooling capacity storage and adjustment system 1. It is sent into the air supply cavity of the refrigerator, and the air flow entering the air supply cavity is sent out from the air supply port, and then enters the return air cavity through the air return port of the freezer, and flows into the return air cavity through the connecting pipe of the exhaust cavity connected with the return air cavity. In the air duct, it is discharged from the exhaust duct through the cooling capacity storage and adjustment system 1 to form a circulation.

There are two cooling circulation systems, and the two cooling circulation systems are respectively the cooling circulation system for the refrigerated showcase and the refrigeration circulation system for the refrigerated showcase. By setting the cooling circulation system as a cooling circulation system for refrigerated showcases and a cooling circulation system for refrigerated showcases, multiple refrigerated showcases and refrigerated showcases can be simultaneously cooled to further save cooling costs. In the refrigerated display case 2, an air supply port, a refrigerated display case air supply chamber 9, an air return port, a refrigerated display case return air chamber 10, an evaporator, a throttling device, a condenser and a compressor are arranged. An air supply port, an air return port, a return air cavity 19 of the freezing display case, an air supply cavity 18 of the freezing display case and an evaporator are arranged in the freezing display case 11. The refrigerated showcase 2 and the frozen showcase 11 are located on the indoor side, and other devices are located on the outdoor side.

The refrigerated display cabinet cooling circulation system includes a cooling capacity storage and adjustment system 1, at least two refrigerated display cabinets connected in parallel 2, a first outdoor fresh air duct 3, a first air supply duct 4, a first return air duct 5, a first The exhaust duct 6, the first air supply chamber connecting pipe 7 and the first air exhaust chamber connecting pipe 8, the first outdoor fresh air pipe 3 are connected to the air inlet of the cooling capacity storage and adjustment system 1, and the cooling capacity storage and adjustment system 1 The air outlet is connected to the first air supply pipe 4, the input end of the first air supply chamber connecting pipe 7 is connected to the first air supply pipe 4, the output end is connected to the air supply chamber 9 of the refrigerated showcase, and the first row of air chamber connecting pipes The input end of 8 is connected with the return air cavity 10 of the refrigerated showcase, the output end is connected with the first return air duct 5, and the output end of the first return air duct 5 is connected with the return air outlet of the cold storage and adjustment system 1, the first row The air duct 6 is connected with the air outlet of the cold storage and adjustment system 1 . The outdoor air flows into the cooling capacity storage and adjustment system 1 through the first outdoor fresh air duct 3, and the outdoor intake air is stored cold through the cooling capacity storage and adjustment system 1, and the air flow after the cold storage enters the first air supply duct 4, and then The first air supply chamber connection pipe 7 is sent into the air supply chamber 9 of the refrigerated showcase, and the air flow entering the air supply chamber 9 of the refrigerated showcase is sent out from the air supply port, and then enters the return air chamber 10 through the return air port of the refrigerated showcase. Inside, it flows into the first return air duct 5 through the first row air chamber connecting pipe 8 connected with the return air chamber 10 of the refrigerated showcase, and then is discharged from the first exhaust duct 6 through the cooling capacity storage and adjustment system 1, Form a loop.

The refrigerated display cabinet cooling circulation system includes a cooling capacity storage and adjustment system 1, at least two refrigerated display cabinets 11 connected in parallel, a second outdoor fresh air duct 12, a second air supply duct 13, a second return air duct 14, a second The exhaust duct 15, the second air supply chamber connecting pipe 16 and the second exhaust chamber connecting pipe 17, the second outdoor fresh air pipe 12 are connected with the air inlet of the cooling capacity storage and adjustment system 1, and the cooling capacity storage and adjustment system 1 The air outlet is connected with the second air supply pipe 13, the input end of the second air supply chamber connecting pipe 16 is connected with the second air supply pipe 13, the output end is connected with the air supply chamber 18 of the refrigerated display cabinet, and the second air discharge chamber connecting pipe The input end of 17 is connected with the return air cavity 19 of the refrigerated showcase, the output end is connected with the second return air duct 14, and the output end of the second return air duct 14 is connected with the return air outlet of the cold storage and adjustment system 1, and the second row The air duct 15 is connected with the air outlet of the cold storage and adjustment system 1 . The outdoor air flows into the cold storage and adjustment system 1 through the second outdoor fresh air pipe 12, and the outdoor air is stored cold through the cold storage and adjustment system 1, and the air flow after the cold storage enters the second air supply pipe 13 , and then sent into the air supply chamber 18 of the refrigerated display cabinet by the second air supply chamber connecting pipe 16, the air flow entering the air supply chamber 18 of the refrigerated display cabinet is sent out from the air supply port, and then enters into the refrigerated display cabinet through the air return port. The air chamber 19 flows into the second air return duct 14 through the second air exhaust chamber connecting pipe 17 connected to the return air chamber 19 of the refrigerated showcase, and then flows from the second air exhaust duct through the cooling capacity storage and adjustment system 1. 15 is discharged to form a cycle.

On the first outdoor fresh air duct 3 and the second outdoor fresh air duct 12, an air cleaning device 20 is arranged, and by setting the air cleaning device 20 on the first outdoor fresh air duct 3 and the second outdoor fresh air duct, the air cleaning device 20 can The outdoor fresh air is filtered to make the air flow into the freezer highly clean. Both the first air supply duct 4 and the second air supply duct 13 are provided with an air supply motor 24 , and the first return air duct 5 and the second air return duct 14 are both provided with a return air motor 25 . The air blowing motor 24 and the return air motor 25 play a role in diverting and pressurizing the wind flow.

Both the first outdoor fresh air duct 3 and the second outdoor fresh air duct 12 are provided with a first sensor 21 for detecting the temperature of the outdoor fresh air, and both the refrigerated showcase 2 and the frozen showcase 11 are provided with a second sensor for detecting the temperature inside the cabinet 22. Both the first return air duct 5 and the second return air duct 14 are provided with a third sensor 23 for detecting return air temperature. The first sensor 21 for detecting the temperature of the outdoor fresh air, the second sensor 22 for detecting the temperature inside the cabinet, and the third sensor 23 for detecting the temperature of the return air coordinately control the start and stop of the compressor in the refrigerator and the intake of the outdoor fresh air to supply cooling to the display cabinet , to achieve energy-saving benefits.

The cold storage and adjustment system 1 includes a cold storage device 1-1, a static pressure tank 1-2, a first air duct 1-3, a second air duct 1-4, a third air duct 1-5, and a fourth air duct 1 -6. The fifth air duct 1-7 and the sixth air duct 1-8, the cold storage device is a refrigerated cold storage device 1-1-1 or a frozen cold storage device 1-1-2. By setting the cold storage device as a cold storage device or a cold storage device, the cold storage device 1-1-1 can be used for cold storage of the refrigerated showcase 2, and the cold storage device 1-1-2 can be used for cold storage of the frozen showcase 11. The first air duct 1-3 and the second air duct 1-4 are connected in parallel with the outdoor fresh air duct, the static pressure box 1-2 is respectively connected with the first air duct air supply duct 4 and the third air duct, and the cold storage device 1- 1 are respectively connected with the second air duct 1-4 and the fourth air duct 1-6, the fourth air duct 1-6 and the third air duct 1-5 are respectively connected with the fifth air duct 1-7, and the fifth Both ends of the air duct 1-7 are respectively connected with the return air duct and the exhaust air duct, the sixth air duct 1-8 is arranged between the cold storage device 1-1 and the first air duct 1-3, and the first air duct 1 -3. The second air pipe 1-4, the third air pipe 1-5, the fourth air pipe 1-6, the fifth air pipe 1-7 and the sixth air pipe 1-8 are all provided with valves.

The cold storage device includes a heat pipe, a phase-change ice storage ball and a cooling medium, and the phase-change ice storage ball can perform step-change phase-change cold storage and cold extraction according to different storage temperatures. The cold storage and adjustment system can adjust the cold storage capacity of the cold storage device according to the load of the display cabinet, and store cold in different regions, different seasons, different times and different periods to achieve energy-saving benefits. The cold storage equipment is composed of heat pipes, ice storage spheres and cold-carrying medium. The different phase transition temperatures of the ice storage spheres are used for cold storage. puck.

Table 1 Phase transition temperature of different ice pucks

ice hockey type Phase transition temperature (°C) 1 0 2 -2 3 -4 4 -6 5 -8 6 -10 7 -12 8 -14 9 -16 10 -18 11 -20 12 -twenty two

The operation control strategy mode of the natural cold source combined cooling display cabinet system of the utility model is as follows:

1) Make full use of the outdoor cold source for cooling + cold storage mode

When the outdoor air temperature is lower than the storage requirement temperature and the cooling load inside the cabinet can be eliminated, the refrigeration system stops running, and the outdoor cold source is fully used to maintain the temperature inside the cabinet, and the cold storage device of the cold storage and adjustment system 1 starts to store cold. After the cold source is purified by the air purification device 20 at the entrance of the fresh air, it enters the cold storage and adjustment system 1 through the first outdoor fresh air pipe 3, and the cold air is divided into two paths, one of which passes through the valve and the first air pipe 1-3. The static plenum 1-2, the valve located on the third air pipe 1-5 is opened, the fresh air and part of the return air are mixed in the static plenum 1-2, and after reaching the air supply state point, it passes through the first air supply pipe 4 and is After the air supply fan 24 is pressurized, it enters the refrigerated display case 2 and blows out from the air supply port and the leeward plate to eliminate the internal cooling load of the refrigerated display case 2 . The return air passes through the return air cavity 10 of the refrigerated showcase from the return air outlet, enters the first return air duct 5 under the action of the return air fan 25, and is discharged outside from the first exhaust duct 6; the other way passes through the second air duct. The valve on 1-4 enters the cold storage device 1-1-1 for cold storage, and the high-temperature air after absorbing heat is pressurized by the fan located on the fourth air duct 1-6, and passes through the fourth air duct 1-6. The valve is discharged from the fifth air pipe 1-7;

2) Outdoor cold source cooling mode

When the outdoor ambient temperature is lower than the storage requirement temperature and the cold storage operation is completed. The cold air is first processed by the air purification device, enters the cold storage and adjustment system 1, and enters the refrigerated showcase 2 after being pressurized by the first air supply pipe 4 and the air supply fan 24. The return air passes through the return air cavity 10 of the refrigerated showcase from the return air outlet, and under the action of the return air fan 25, part of it enters the static pressure box 1-2 through the return air duct, and is mixed with the outdoor fresh air to reach the air supply state point, and the rest The return air is discharged outside through the exhaust duct to complete the cycle;

3) Outdoor cold source + cold storage device cooling mode

When the outdoor temperature is higher than the storage requirement temperature and lower than the return air temperature, use the outdoor cold source to get cold through the cold storage device. After the outdoor cold air is purified by the air purification device 20 at the fresh air inlet, it enters the cold storage and adjustment system 1 through the first outdoor fresh air pipe 3, the valves on the first air pipe 1-3 are closed, and the cold air passes through the second air pipe 1 The valve on -4 enters the refrigerated cold storage device, and the cold wind after getting cold from the refrigerated cold storage device passes through the valve on the sixth air pipe 1-8 and the static pressure box 1-2, and the valve on the third air pipe 1-5. The valve is opened, and the fresh air and part of the return air are mixed in the static pressure box 1-2. After reaching the air supply state point, it enters the refrigerated display cabinet 2 through the first air supply pipe 4, and the return air from the refrigerated display cabinet 2 passes through the first row. The air duct 5 is discharged; when the outdoor temperature is higher than the return air temperature, the refrigeration system stops running, and the return air is used to get cold through the cold storage device 1-1-1, and the air valve 26 on the first outdoor fresh air duct 3 and the air valve 26 located on the first outdoor fresh air duct 3 are closed. The valves on the five air pipes 1-7, the return air enters the refrigeration storage device 1-1-1 from the valves on the first return air pipe 5 and the fourth air pipe 1-6, and comes out from the refrigeration storage device 1-1-1 The cold wind enters the refrigerated display cabinet 2 through the valve on the sixth air pipe 1-8 and the static pressure box 1-2, and completes the cycle;

4) Refrigeration system + cold storage device cooling mode

When the cooling capacity provided by the cold storage device is not enough to eliminate the cooling load of the showcase, the refrigeration system starts. Include two running strategies

(1) When the outdoor temperature is lower than the return air temperature, use the outdoor cold source to get cold through the cold storage device 1-1-1. After the outdoor cold air is purified by the air purification device 20 at the fresh air inlet, it enters the cooling capacity storage and adjustment system 1 through the first outdoor fresh air pipe 3, the valves on the first air pipe 1-3 are closed, and the cold air passes through the second air pipe The valve on 1-4 enters the refrigerated cold storage device 1-1-1, and the cold air taken from the refrigerated cold storage device 1-1-1 passes through the valve on the sixth air pipe 1-8 and the static pressure box 1-2, The valve located on the third air pipe 1-5 is opened, and the fresh air and part of the return air are mixed in the static pressure box 1-2. After reaching the air supply state point, it enters the refrigerated display cabinet 2 through the first air supply pipe 4, and enters the refrigerated display cabinet 2 from the refrigerated display The return air from cabinet 2 is discharged from the fifth air pipe 1-7; (2) When the outdoor temperature is higher than the return air temperature, the return air is used to obtain cold through the cold storage device 1-1-1, and the first outdoor fresh air pipe is closed The air valve 26 on the 3 and the valve on the fifth air pipe 1-7, the return air enters the refrigeration and cold storage device 1-1-1 from the first return air pipe 5 and the valve on the fourth air pipe 1-6. The cold air from the cold storage device 1-1-1 enters the cold display cabinet 2 through the valve located on the sixth air pipe 1-8 and the static pressure box 1-2 to complete the cycle;

5) Combined cooling mode of outdoor cold source + refrigeration system

When the outdoor ambient temperature is lower than the return air temperature but not enough to eliminate the cooling load in the cabinet, and the cooling capacity of the cold storage device has been used up, the refrigeration system starts. After the cold source is purified by the air purification device 20 at the entrance of the fresh air, it enters the cold storage and adjustment system 1. The cold air is divided into two paths, one of which passes through the valve on the first air pipe 1-3 and the static pressure box 1-2. Through the first air supply duct 4, after being pressurized by the air supply fan 24, it enters the refrigerated showcase 2, and blows out from the refrigerated showcase 2 air outlets and the leeward plate to eliminate the cooling load in the cabinet. The return air passes through the return air cavity 10 of the refrigerated showcase from the return air outlet, enters the first return air duct 5 under the action of the return air fan 25, and is discharged outside from the first exhaust duct 6; the other way passes through the second air duct. The regulating valve on 1-4 enters the cold storage device 1-1-1 for cold storage, and the exhaust air after absorbing heat is pressurized by the fan located on the fourth air pipe 1-6, and passed through the fourth air pipe 1-6. The valve of the valve is discharged from the fifth air pipe 1-7;

6) Fully utilize the refrigeration system cooling mode

When the outdoor ambient temperature is higher than the return air temperature and the cooling capacity of the refrigeration storage device has been exhausted, the refrigeration system starts, and the first outdoor fresh air pipe 3, the first air supply chamber connecting pipe 7 and the first air discharge chamber are connected. The air valve on the pipe 8 is closed, and the display cabinet is completely cooled by the refrigeration system. An opening valve is arranged in the refrigerated showcase 2, and at this time, the valve is opened to close the remaining valves, and the return air returns to the return air chamber 10 of the refrigerated showcase from the air return port. After the return air is cooled by the evaporator, it is blown out from the air supply port to cool the food, and then Return to the return air outlet to complete the cycle.

The above only describes the control mode of the cooling cycle system of the refrigerated showcase, and the control mode of the cooling cycle system of the refrigerated showcase is the same as that of the cooling cycle system of the refrigerated showcase.

Claims (10)

1. A natural cold source combined cooling display cabinet system, including at least one cooling cycle system, characterized in that: each of the cooling cycle systems includes a cold storage and adjustment system (1), at least two parallel The connected refrigerator, outdoor fresh air duct, air supply duct, return air duct, exhaust duct, air supply chamber connecting pipe and exhaust chamber connecting pipe, the outdoor fresh air pipe is connected with the air inlet of the cold storage and adjustment system, and the cold storage The air outlet of the adjustment system is connected to the air supply pipe, the input end of the air supply chamber connecting pipe is connected to the air supply pipe, the output end is connected to the air supply chamber of the refrigerator, and the input end of the air exhaust chamber connecting pipe is connected to the return air chamber of the refrigerator. The output end is connected to the return air duct, the output end of the return air duct is connected to the air return port of the cold storage and adjustment system (1), and the exhaust duct is connected to the air exhaust port of the cold storage and adjustment system (1). 2. The natural cold source combined cooling display cabinet system according to claim 1, characterized in that: there are two cooling circulation systems, and the two cooling circulation systems are respectively the refrigeration display cabinet cooling circulation system and the freezing Showcase cooling system. 3. The natural cold source combined cooling display cabinet system according to claim 2, characterized in that: the cooling display cabinet cooling circulation system includes a cold storage and adjustment system (1), at least two parallel-connected refrigerators Display cabinet (2), first outdoor fresh air duct (3), first air supply duct (4), first return air duct (5), first exhaust duct (6), first air supply cavity connecting pipe ( 7) It is connected with the first row of air cavity connecting pipes (8), the first outdoor fresh air duct (3) is connected with the air inlet of the cooling capacity storage and adjustment system (1), and the air outlet of the cooling capacity storage and adjustment system (1) is connected with The first air supply pipe (4) is connected, the input end of the first air supply chamber connecting pipe (7) is connected with the first air supply pipe (4), the output end is connected with the air supply chamber (9) of the refrigerated showcase, and the first The input end of the exhaust chamber connection pipe (8) is connected to the return air chamber (10) of the refrigerated showcase, the output end is connected to the first return air duct (5), and the output end of the first return air duct (5) is connected to the cooling capacity The storage and adjustment system (1) is connected to the air return port, and the first exhaust duct (6) is connected to the cold storage and adjustment system (1) exhaust port. 4. The natural cold source combined cooling display cabinet system according to claim 3, characterized in that: the refrigeration display cabinet cooling cycle system includes a cold storage and adjustment system (1), at least two parallel-connected refrigerators Display cabinet (11), second outdoor fresh air duct (12), second air supply duct (13), second return air duct (14), second exhaust air duct (15), second air supply cavity connecting pipe ( 16) and the second air exhaust cavity connecting pipe (17), the second outdoor fresh air pipe (12) is connected with the air inlet of the cooling capacity storage and adjustment system (1), and the air outlet of the cooling capacity storage and adjustment system (1) is connected with The second air supply pipe (13) is connected, the input end of the second air supply chamber connecting pipe (16) is connected with the second air supply pipe (13), the output end is connected with the air supply chamber (18) of the refrigerated showcase, and the second The input end of the exhaust chamber connecting pipe (17) is connected to the return air chamber (19) of the refrigerated showcase, the output end is connected to the second return air duct (14), and the output end of the second return air duct (14) is connected to the cooling capacity The storage and adjustment system (1) is connected to the return air outlet, and the second exhaust duct (15) is connected to the cooling storage and adjustment system (1) exhaust outlet. 5. The natural cold source combined cooling display cabinet system according to claim 1, characterized in that: the cold storage and adjustment system (1) includes a cold storage device (1-1), a static pressure box (1-2 ), the first duct (1-3), the second duct (1-4), the third duct (1-5), the fourth duct (1-6), the fifth duct (1-7 ) and the sixth air pipe (1-8), the first air pipe (1-3) and the second air pipe (1-4) are connected in parallel with the outdoor fresh air pipe, and the static pressure box (1-2) is respectively connected to the first The air pipe (1-3), the air supply pipe and the third air pipe (1-5) are connected, and the cold storage device (1-1) is respectively connected with the second air pipe (1-4) and the fourth air pipe (1- 6) Connected, the fourth air pipe (1-6) and the third air pipe (1-5) are respectively connected with the fifth air pipe (1-7), and the ends of the fifth air pipe (1-7) are respectively Connected with the return air duct and the exhaust duct, the sixth air duct (1-8) is set between the cold storage device and the first air duct (1-3), between the first air duct (1-3), the second Air ducts (1-4), third ducts (1-5), fourth ducts (1-6), fifth ducts (1-7) and sixth ducts (1-8) are set There are valves (1-9). 6. The natural cooling source combined cooling display cabinet system according to claim 5, characterized in that: the cold storage device (1-1) is a refrigerated cold storage device (1-1-1) or a frozen cold storage device (1-1-1) 1-2). 7. The natural cold source combined cooling display cabinet system according to claim 4, characterized in that: the first outdoor fresh air duct (3) and the second outdoor fresh air duct (12) are equipped with air purification devices (20 ). 8. The natural cold source combined cooling display cabinet system according to claim 4, characterized in that: the first outdoor fresh air duct (3) and the second outdoor fresh air duct (12) are equipped with sensors for detecting the temperature of outdoor fresh air The first sensor (21), the second sensor (22) for detecting the temperature inside the refrigerated display cabinet (2) and the refrigerated display cabinet (11), is installed on the first return air duct (5) and the second return air duct (5) The air ducts (14) are provided with a third sensor (23) for detecting the return air temperature. 9. The natural cold source combined cooling display cabinet system according to claim 4, characterized in that: the first air supply duct (4) and the second air supply duct (13) are equipped with an air supply motor (24) , return air motors (25) are provided on both the first return air duct (5) and the second return air duct (14). 10. The natural cold source combined cooling display cabinet system according to claim 1, characterized in that: outdoor fresh air ducts, air supply ducts, air supply chamber connecting pipes, return air chamber connecting pipes return air ducts and exhaust ducts Air valve (26) is all provided with on.