CN216132156U - Low temperature cold storage water defrosting system - Google Patents
Low temperature cold storage water defrosting system Download PDFInfo
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- CN216132156U CN216132156U CN202121733419.XU CN202121733419U CN216132156U CN 216132156 U CN216132156 U CN 216132156U CN 202121733419 U CN202121733419 U CN 202121733419U CN 216132156 U CN216132156 U CN 216132156U
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Abstract
The utility model discloses a water defrosting system of a low-temperature refrigerator, which comprises a first cold room, a second cold room and a defrosting circulating water pool, wherein the first cold room is communicated with the second cold room; the first cold room and the second cold room are respectively provided with a first air cooler and a second air cooler; the defrosting circulation water pool is used for defrosting the first air cooler and the second air cooler through a defrosting water pump and a defrosting water supply pipe respectively; the defrosting water supply pipe is connected with a water drain pipe; a first water seal device is arranged on the water drain pipe; a second water seal device is arranged on the defrosting drain pipe; a drain valve is arranged on the drain pipe; the water-seal device is arranged to prevent water vapor in outdoor air from entering a storehouse under the action of air pressure difference to cause ice blockage of the water supply pipe.
Description
Technical Field
The utility model relates to the technical field of low-temperature refrigerators, in particular to a low-temperature refrigerator water defrosting system.
Background
In a low-temperature refrigeration house adopting a fan for refrigeration, after an air cooler works for a certain time, fins of the air cooler frost, and the air cooler needs to be defrosted periodically for ensuring the refrigeration effect of the fan. The fan defrosting mode mainly comprises a combination mode of water defrosting, hot air defrosting, electric defrosting, water heating air defrosting, electric heating air defrosting and the like, and the water defrosting is common in China at present. However, when water passes through a low-temperature environment, such as improper design, installation or operation, frost is likely to form to the drain pipe, ice and block the drain pipe. The utility model discloses a defrosting device for a refrigeration house (the authorization publication number is CN202928255U) which can not solve the problem of ice blockage of a defrosting water pipe; the utility model discloses a device for defrosting water in a cold storage and recycling the defrosting water and the defrosted water (No. CN201093828Y), which designs a water seal of a drain pipe, but does not consider the design calculation of water seal strength, and can not completely solve the problem of ice blockage of the defrosting drain pipe; the literature, "analysis and solution of reasons for blocking of pipelines of an air cooler defrosting water system", mentions a method for adding a drain pipe to a defrosting water supply pipe, but in actual use, the situation that the defrosting water supply pipe is blocked by ice still exists, the situation that the defrosting water pipe is blocked by ice due to the difference between the internal pressure and the external pressure of a cold room is not considered, and the situation that the defrosting water pressure is reduced, the defrosting effect is difficult to guarantee, and energy is not saved because a water valve is not arranged in the drain pipe. GB50072-2010 design code for refrigerator "8.1.13 refrigerator defrosting water system should meet the following regulations: 5 the defrosting water supply pipe is provided with a slope and inclines towards the air cooler. The pipeline should be provided with a drainage device and anti-condensation measures, the outlet of the 8.2.9 defrosting drainage pipeline should be provided with a water seal or a water seal well, and the drainage device and the water seal are provided, but the specific setting method and the calculation of the water seal strength are not described. The low-temperature cold storage water defrosting system is needed to be provided, and the problem that a water supply pipe and a water discharge pipe of the low-temperature cold storage water defrosting system are blocked due to icing is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-temperature refrigerator water defrosting system, which solves the problem that a water supply pipe and a water discharge pipe of the low-temperature refrigerator water defrosting system are frozen and blocked.
The utility model is realized by the following technical scheme:
a water defrosting system of a low-temperature refrigeration house comprises a first cold room, a second cold room and a defrosting circulating water pool; the first cold room and the second cold room are respectively provided with a first air cooler and a second air cooler; the defrosting circulating water pool is used for defrosting the first air cooler and the second air cooler through a defrosting water pump and a defrosting water supply pipe respectively; the first air cooler and the second air cooler both drain defrosting water back to the defrosting circulating water pool through a defrosting drain pipe; wherein: the defrosting water supply pipe is connected with a water drain pipe; a first water seal device is arranged on the water drain pipe; a second water seal device is arranged on the defrosting drain pipe; and a drain valve is arranged on the drain pipe.
Further, the defrosting water pump is connected with the defrosting water supply pipe through a defrosting adjusting station.
Furthermore, a defrosting total water valve is arranged between the defrosting water pump and the defrosting regulation station.
Furthermore, the defrosting regulation station is connected with the defrosting water supply pipe through a defrosting water valve.
Further, the calculation formulas of the water seal strength of the first water seal device and the second water seal device are as follows:
wherein p isbThe highest atmospheric pressure at the place where the cold room is located is unit kpa; t is the upper and lower limits of the design temperature of the cold room, unit ℃; a is a correction coefficient and can be 0.3-1.
The utility model has the beneficial effects that:
according to the utility model, the drain pipe is provided with the drain valve, the drain valve is closed in the defrosting process to ensure stable defrosting water pressure, and the drain valve is opened after defrosting is finished, so that the problem that water leaked to the defrosting water supply pipe in other cold room defrosting processes is blocked by ice when the cold room defrosting water valve is not closed is solved. The pressure difference exists between the inside and the outside of the refrigeration house due to different temperatures, the water vapor in the outdoor air can be caused to continuously enter the refrigeration house through the drain pipe and the drain pipe under the pressure, the condition that the defrosting water supply pipe and the drain pipe are blocked by ice is caused along with the accumulation of time, and the water sealing device is added to the drain pipe and the defrosting drain pipe to overcome the action of the pressure difference between the inside and the outside of the refrigeration house so as to prevent the water sealing from being damaged. A water seal device is added to a drain pipe of the defrosting water supply pipe, so that water vapor in outdoor air is prevented from entering a storehouse under the action of air pressure difference to cause ice blockage of the water supply pipe.
Drawings
Fig. 1 is a schematic overall structure diagram of a low-temperature cold store water defrosting system according to an embodiment of the utility model;
FIG. 2 is a table of reference values for water seal strength design of water seal apparatuses of water defrosting systems in refrigeration rooms of freezing objects in cities of the whole country (-15 ℃ to-20 ℃) in accordance with an embodiment of the present invention.
In the drawings: 1-a first cold room; 2-a second cold room; 3-defrosting the circulating water pool; 4-a first air cooler; 5-a second air cooler; 6-a defrosting water pump; 7-defrosting water supply pipe; 8-defrosting a drain pipe; 9-a water drain pipe; 10-a first water seal device; 11-a second water seal device; 12-a water escape valve; 13-defrosting regulation station; 14-total water valve for defrosting; 15-defrosting water valve.
Detailed Description
The utility model will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the utility model and are not to be construed as limiting the utility model.
It should be noted that all the directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In the present invention, unless expressly stated or limited otherwise, the term "coupled" is to be interpreted broadly, e.g., "coupled" may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1, a low-temperature refrigerator water defrosting system comprises a first cold room 1, a second cold room 2 and a defrosting circulating water pool 3; the first cold room 1 and the second cold room 2 are respectively provided with a first air cooler 4 and a second air cooler 5; the defrosting circulating water tank 3 is used for defrosting the first air cooler 4 and the second air cooler 5 through a defrosting water pump 6 and a defrosting water supply pipe 7 respectively; the first air cooler 4 and the second air cooler 5 both drain defrosting water back to the defrosting circulating water pool 3 through a defrosting drain pipe 8; wherein: the defrosting water supply pipe 7 is connected with a drain pipe 9; a first water seal device 10 is arranged on the water drain pipe 9; a second water seal device 11 is arranged on the defrosting drain pipe 8; a drain valve 12 is arranged on the drain pipe 9. It should be noted that, the drain valve 12 is closed in the defrosting process to ensure stable defrosting water pressure, and the drain valve 12 is opened after defrosting is completed to prevent the problem that when the cold room defrosting water valve is not closed, the leaked water flows to the defrosting water supply pipe 7 in the other cold room defrosting processes to cause ice blockage. The air pressure difference exists between the inside and the outside of the refrigeration house due to different temperatures, the pressure can cause the water vapor in the outdoor air to continuously enter the refrigeration house through the drain pipe 9 and the drain pipe, the condition that the defrosting water supply pipe 7 and the drain pipe are blocked by ice is caused along with the accumulation of time, and the water sealing device is added to the drain pipe 9 and the defrosting drain pipe 8 to overcome the effect of the air pressure difference between the inside and the outside of the refrigeration house so as to prevent the water sealing from being damaged. A water seal device is added to a drain pipe 9 of the defrosting water supply pipe 7, so that water vapor in outdoor air is prevented from entering a storehouse under the action of air pressure difference to cause ice blockage of the water supply pipe.
Specifically, in the embodiment, the defrosting water pump 6 is connected to the defrosting water supply pipe 7 through a defrosting regulation station 13.
Specifically, in this embodiment, a total defrosting water valve 14 is disposed between the defrosting water pump 6 and the defrosting regulation station 13.
Specifically, in this embodiment, the defrosting regulation station 13 is connected to the defrosting water supply pipe 7 through a defrosting water valve 15.
Specifically, in the embodiment, the first water sealing device 10 and the second water sealing device 11 are designed to have water sealing strength. The wet air is a mixture of dry air and water vapor, and all air containing water vapor is wet air. The subject of research and development of refrigeration technology is the air environment, and the medium used is also humid air. According to the ideal gas assumption, the humid air involved in industrial refrigeration can be regarded as an ideal gas category, and can be expressed by using an ideal gas state equation, namely p ═ ρ · RgT. If the humid air comes from the ambient atmosphere, its pressure is atmospheric pressure pb＝p。
The cold room is used as a freezing object, the cold room is designed and calculated, when the frost of a cold room calandria is thick, the operation of defrosting or goods entering and leaving is carried out to cause the temperature of the cold room to rise, the temperature is assumed to be-15 ℃ (reasonable assumption is made according to GB50072-2010 cold room design specification), the pressure in the cold room is balanced with the pressure in the outdoor environment, and the state equation can be expressed as
p-15℃＝pb＝ρ-15℃·Rg·(-15+273.15)
After defrosting or goods entering and leaving and the like are finished, the air cooler cools to-20 ℃ after the warehouse door is closed, the cooling speed is considered to be high, and the air density at the stage can be considered to be kept stable, namely rho-20 ℃ is rho-15 ℃. At this time, the pressure in the reservoir decreases due to the decrease in the reservoir temperature, and the equation of state thereof can be expressed as
p-20℃＝ρ-15℃·Rg·(-20+273.15)
Difference Δ p between internal and external pressure of cold room-20℃-pbAfter the finishing, the paper is put into a storage tank,
taking Guangzhou city as an example, the atmospheric pressure in summer is 100.39kpa, the atmospheric pressure in winter is 101.86, and p is takenbCalculated as 101.86, Δ p ═ 1.97 kpa. Considering that the cold room is not completely sealed and multiplied by a correction factor of 0.8, the calculated water seal strength in Guangzhou area can be designed to be 16mmH2O。
A design formula of water seal strength of water seal devices of cold water defrosting systems in cold rooms across the country is as follows:
wherein p isbThe highest atmospheric pressure at the place where the cold room is located is unit kpa; t is the upper and lower limits of the design temperature of the cold room, unit ℃; a is a correction coefficient and can be 0.3-1.
(wherein pV-nRT-m/MRT → p-m/MRT)/V, and R is defined as ρ -m/VgWhere p is rho.R, obtained from R/Mg·T)。
Referring to fig. 2, a water seal strength design reference value of a water seal device of a water defrosting system in a refrigeration room of freezing matters of cities in the whole country at (-15 ℃ to-20 ℃).
The utility model relates to a low-temperature refrigerator water defrosting process (taking first cold room 1 water defrosting as an example for explanation): stopping supplying liquid to the first cold room 1 before defrosting, and closing the first air cooler 4; secondly, opening a defrosting total water valve 14, opening a defrosting water valve 15 of the first cold room 1, closing a water drain valve 12 of the first cold room 1, and opening a defrosting water pump 6 for defrosting; after defrosting is finished, the defrosting water pump 6 is closed, the defrosting total water valve 14 is closed, the defrosting water valve 15 of the first cold room 1 is closed, the drain valve 12 is opened to drain accumulated water in the defrosting water supply pipe 7, and accumulated water in the defrosting water supply pipe 7 is prevented from being frozen; when the second cold room 2 is used for defrosting by water, and the first cold room 1 is refrigerating, the opening of the drain valve 12 can also prevent the defrosting water from entering the defrosting water supply pipe 7 when the defrosting water valve 15 is not closed tightly, and at the moment, the first cold room 1 is refrigerating to cause ice blockage.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (5)
1. A water defrosting system of a low-temperature refrigeration house comprises a first cold room, a second cold room and a defrosting circulating water pool; the first cold room and the second cold room are respectively provided with a first air cooler and a second air cooler; the defrosting circulating water pool is used for defrosting the first air cooler and the second air cooler through a defrosting water pump and a defrosting water supply pipe respectively; the first air cooler and the second air cooler both drain defrosting water back to the defrosting circulating water pool through a defrosting drain pipe; the method is characterized in that: the defrosting water supply pipe is connected with a water drain pipe; a first water seal device is arranged on the water drain pipe; a second water seal device is arranged on the defrosting drain pipe; and a drain valve is arranged on the drain pipe.
2. The low-temperature cold storage water defrosting system according to claim 1, which is characterized in that: the defrosting water pump is connected with the defrosting water supply pipe through a defrosting adjusting station.
3. The low-temperature cold storage water defrosting system according to claim 2, characterized in that: and a defrosting total water valve is arranged between the defrosting water pump and the defrosting regulation station.
4. The low-temperature cold storage water defrosting system according to claim 2, characterized in that: and the defrosting regulation station is connected with the defrosting water supply pipe through a defrosting water valve.
5. The low-temperature cold storage water defrosting system according to claim 1, which is characterized in that: the calculation formulas of the water seal strength of the first water seal device and the second water seal device are as follows:
strength of water seal
Wherein p isbThe highest atmospheric pressure at the place where the cold room is located is unit kpa; t is the upper and lower limits of the design temperature of the cold room, unit ℃; a is a correction coefficient and can be 0.3-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121733419.XU CN216132156U (en) | 2021-07-28 | 2021-07-28 | Low temperature cold storage water defrosting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121733419.XU CN216132156U (en) | 2021-07-28 | 2021-07-28 | Low temperature cold storage water defrosting system |
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| Publication Number | Publication Date |
|---|---|
| CN216132156U true CN216132156U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121733419.XU Active CN216132156U (en) | 2021-07-28 | 2021-07-28 | Low temperature cold storage water defrosting system |
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| CN (1) | CN216132156U (en) |
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- 2021-07-28 CN CN202121733419.XU patent/CN216132156U/en active Active
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