Built For A Shop Front, Not A Kitchen - 1895 mm Tall, 12 V / 24 V DC Or 220 V AC, 0 To 10 °C
A glass door cooler is a different product from a refrigerator, even when the compressor inside is similar. The refrigerator keeps food cold for one household and is opened a few times an hour. A glass door cooler is asked to sell: it stands where customers walk, it shows what is inside before anyone touches the handle, and it is opened by strangers who have no reason to close it gently. Everything about the LC-328 follows from that second job.
It is a 300 litre upright cabinet, 1895 mm tall, on a 620 by 573 mm footprint that fits the gap between a counter and a wall in a small shop. The body is white, the door frame and plinth are black, and the whole front is one full height pane of glass so that the top shelf is visible to a customer standing two metres away. Above the glass there is a lit header panel that takes a printed or photographic insert, because in a shop the top 200 mm of a cabinet is advertising space before it is anything else.
Electrically it is deliberately not fussy. The same cabinet is built to run from a 12 V or 24 V DC bank, or from 220 V AC mains, which means a shop that has grid power today and a solar array later does not have to buy the cooler twice. Cooling is direct: the evaporator and its fan sit behind a slotted panel at the top of the interior, the condenser is an open wire coil across the whole back of the cabinet with a fan and louvres in the base plinth, and the thermostat is a dial on that top panel, reachable without tools.
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300 L
USABLE VOLUME
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1895 mm
HEIGHT
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0–10 °C
HOLDING RANGE
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12/24 V
DC, OR 220 V AC
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What 300 litres looks like on a shop floor
The footprint is 620 mm wide and 573 mm deep. Read that against the two numbers a shopkeeper actually works with: a standard checkout counter is around 600 mm deep, and a shop doorway is around 800 mm clear. So the cabinet stands in the same depth band as a counter, and it will go through a normal door on its side with the packaging off and two people carrying it.
Height is the number that decides where it can go. At 1895 mm the cabinet is taller than most people's eye line and it will not fit under a shelf, a mezzanine or a low ceiling fan. What it does do is put the fourth and fifth shelves within reach of an adult standing on the floor, which is exactly where the high-margin lines should be. A 1.2 m cabinet forces the shopkeeper to stock the top shelf with slow movers because nobody can see it.
Weight is 75 kg gross in the export carton and 62 kg net. The carton measures 680 by 645 by 1970 mm, which is a one-unit footprint for container planning: 72 cabinets fit a 40′HQ. For a mixed container, the practical rule is to load these upright and never lay a glass door cabinet flat - a door that has been stacked under other cartons for three weeks will arrive with a twist in the frame that no amount of adjustment removes.
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MODULE 02
The door is the productOn a glass door cooler the door is not an access panel, it is the display. It is also the weakest thermal point in the cabinet, and the way it is built decides whether the cooler holds temperature in a busy shop or runs flat out all day. The pane is full height and full width inside a black frame, so there is no bottom rail to hide the front row of bottles and no mullion interrupting the view. The frame carries a continuous magnetic gasket that pulls the door shut against the cabinet face; when the gasket is clean and the cabinet is level, the door closes itself from about 20 degrees open, which is the behaviour that saves the most energy in real shops, because staff let go of doors rather than closing them. Two habits repay themselves within a season. First, keep the gasket wiped: a film of sticky drink residue stops the magnet sealing and the cabinet then runs with a permanent leak that nobody notices until the compressor is running continuously. Second, plan the door swing: the hinge side needs clear floor, and the cabinet should not sit where a queue stands, because a door held open by a customer's back is the single most expensive thing that happens in a shop. |
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How the cold air reaches the bottom shelf
Inside, the cabinet is white steel with a slotted panel across the top. Behind that panel sits the evaporator and its fan. Air is pulled through the coil, delivered along the ceiling towards the door, and then falls down the inside of the glass - which is where the heat load is - before returning up the back wall. That is the standard forced-air pattern for a glass door cabinet, and it is the reason the bottom shelf stays cold without a second evaporator.
The shelves are white coated wire, not glass. On a display cooler that is a functional choice rather than a cheap one: wire lets the air column pass through every shelf instead of turning each glass shelf into a lid, and it lets a shopkeeper see the row behind without pulling the front row out. The shelves sit in stamped slots down both side walls, so the spacing is set by the shopkeeper rather than the factory: tall bottles on one shelf, cans on the next.
| Part | What it does | What it means in daily use |
|---|---|---|
| Slotted top panel | Delivers air along the ceiling and hides the evaporator | Keeps stock away from the coil; nothing can be pushed into the fan |
| Wire shelves in side slots | Carry the load and let air pass through | Shelf heights set on site, no tools, no clips to lose |
| Thermostat dial | Sets the holding temperature inside the 0–10 °C band | Adjustable from the front with the door open; no service call to change a set point |
| Magnetic gasket | Seals the door against the cabinet face | A replaceable part; the first thing to check when a cabinet stops holding temperature |
| Header light box | Back-lit panel above the door | Takes a printed insert; rebrand the cabinet for a new promotion in ten minutes |
Holding range is the declared 0–10 °C band for this model. Beverage service usually sits at the upper half of that band; dairy and fresh juice at the lower half.
The air panel across the top of the interior: vent slots, thermostat dial and the indicator lamp, all reachable with the door open.
A production run of LC-328 cabinets outside the assembly hall, each with its header panel fitted before packing.
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Left: the top of the interior, with the slotted air panel and the thermostat dial. Right: a wire shelf seated in its side slots.
The header panel, and why it is not decoration
The panel above the glass is the part of the cooler that earns its space. In a street of shops, a customer decides whether to walk in from about five metres, and at that distance the only part of a cooler they can read is the lit header. It is also the one part of the cabinet that can be changed without touching the refrigeration, which makes it the natural place for a price message, a brand, or a seasonal promotion.
The insert is a printed sheet that sits behind the light box diffuser. Because it is a flat panel rather than a moulded logo, a distributor can localise it per market: the same cabinet leaves the factory with a generic drink image and arrives in a shop with the shopkeeper's own artwork in the frame. For an OEM order this is usually the first thing a buyer asks to change, and it is the cheapest change on the whole specification.
Practical detail: the light box is on whenever the cabinet is powered, so treat it as part of the daily load when sizing a battery bank. A shop that runs the cooler on DC and switches the cabinet off at night loses the light - which is exactly the moment the shop front is dark and the header would do the most work. The better arrangement is to keep the cabinet powered overnight at its set point and let the thermostat do the cycling, because a cooler that has been off for eight hours spends the first two hours of the next morning pulling heat out of the stock instead of selling.
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The door open at ninety degrees shows the full height glass and the interior lighting; the header insert is a printed sheet behind the diffuser.
One cabinet, three ways to power it
The LC-328 is built to accept 12 V DC, 24 V DC and 220 V AC. This is not a marketing line; it is the reason the model sells in places where the grid is unreliable. A shop can start on mains, add a small array and a battery when the power cuts start costing more than the equipment, and keep the same cabinet through both stages.
The choice between 12 V and 24 V is a cable question more than a cooling question. At the same load, a 24 V system moves half the current of a 12 V system, so volt drop along the run is a quarter for the same cable. In a shop where the battery sits in a back room and the cooler stands at the front, that difference is the difference between a compressor that starts cleanly on a hot afternoon and one that chatters and trips.
| Supply | Where it fits | What to watch | Verdict |
|---|---|---|---|
| 220 V AC | Shop with a stable grid | Voltage swings and outages; unrelated to the cabinet, but they stop it | Cheapest install, no battery to maintain |
| 12 V DC | Small shop, short cable run, existing 12 V solar kit | Higher current for the same load: keep the run short and the cable thick | Best for retrofits where the battery is close |
| 24 V DC | Larger shop, longer run, array on the roof | Needs a 24 V bank and a 24 V charger; do not mix with 12 V loads | The default for new off-grid shops |
Input power for a specific build is confirmed on the order confirmation rather than assumed from a brochure figure, because it moves with the compressor and the mains option fitted.
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MODULE 06
The condenser is on the outside, and that is the pointTurn the cabinet round and the whole back is an open wire condenser, with a fan and louvred panels in the base. Nothing is hidden behind a cosmetic cover, which matters in two ways. First, a coil that is open to the air sheds heat far better than one boxed behind a panel, and in a 35 °C shop that is the difference between a cabinet that holds temperature and one that never quite gets there. Second, it can be cleaned. Dust and cooking grease on a condenser are the most common cause of a cooler that "suddenly stopped working" in a hot climate, and an open coil can be brushed in ten minutes. The cost of that design is clearance. The cabinet needs air behind it and must not be pushed flat against a wall. Treat the rear gap as part of the installation, not as an afterthought. |
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The same open wire condenser seen across a full production row: no cover panel, fan and louvres in the base plinth.
Where a 300 litre glass door belongs
The same cabinet is sold into very different rooms. What changes between them is not the refrigeration but the discipline around the door, the clearance at the back and the way the shop is powered.
| Site | Why this model fits | Installation note |
|---|---|---|
| Village shop / kiosk | One cabinet covers soft drinks, water and dairy | Put it where the door cannot be held open by the queue; keep the rear gap clear even if it costs 100 mm of floor |
| Cafe / bar | Visible stock sells the second drink | Keep it away from the espresso machine; radiant heat from a coffee station is worse than the room temperature |
| Restaurant back of house | Bottled drinks and portioned stock within arm's reach | Wash-down rooms raise humidity; wipe the gasket weekly and keep the coil clear of grease |
| Pharmacy / clinic waiting area | 0–10 °C band covers water, rehydration and cold-chain-adjacent items | Set the dial towards the lower half of the band; verify with a thermometer in a glass of water, not by feel |
| Market stall / event bar | Runs from a battery bank with no generator noise | Pre-chill the stock before the event; a cabinet loaded with warm drinks cannot catch up |
| Boat / staff canteen | Tall, narrow footprint with a strong visual face | Strap the cabinet at the top as well as the base; a 1895 mm cabinet has a long lever arm in a seaway |
Battery and array sizing is quoted per project against the actual daily opening hours and ambient temperature of the site.
Three cabinets in a courtyard before dispatch, header panels and glass doors already fitted.
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MODULE 08
Commissioning a glass door coolerA cooler that is installed badly will be blamed for the refrigeration. The first two hours on site decide most of that. Stand it up and leave it. If the cabinet has travelled on its side, stand it upright and wait at least four hours before switching on. Oil that has run into the suction line needs time to settle back into the compressor; running immediately is the most common way a new DC compressor is damaged in the first week. Leave the back open. The condenser is on the rear face and needs air. A cabinet pushed tight to a wall will hold temperature in a cool room and fail in a hot one. Run it empty first. Let the cabinet pull down to set point with nothing inside, confirm the compressor cycles rather than runs continuously, then load in two passes. Loading a warm cabinet with a full day's stock simply extends the pull-down by hours and puts the compressor under load at the worst moment. Check the door. Level the cabinet so the door swings shut on its own from a small angle. If it hangs open, the frame is twisted on an uneven floor - adjust the feet before touching the gasket. |
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MODULE 09
Service, spares and the second ownerA display cooler in a shop is worked harder than a domestic refrigerator and is expected to last through several owners. The parts that fail are predictable, and all of them are accessible from the front or the back without dismantling the cabinet. Gasket. First suspect every time temperature drifts. Wipe it monthly; replace when it no longer pulls the door shut. Condenser. Brush the rear coil every few months in a dusty or greasy site. This single habit prevents most "the cooler is not cold any more" calls. Fan and thermostat. Both are service parts, reachable behind the top panel or the base louvres. A noisy fan is a warning, not a failure. Documentation. Each cabinet ships with its manual; keep the model and serial with the shop's equipment record so a replacement gasket or thermostat is ordered against the right build, not against a photograph. |
Specification, LC-328
| Model | LC-328 |
| Type | Single door upright display cooler, glass door, header light box |
| Volume | 300 L |
| Temperature range | 0 to 10 °C, set by thermostat dial |
| Product dimensions | 620 × 573 × 1895 mm (W × D × H) |
| Carton dimensions | 680 × 645 × 1970 mm |
| Gross / net weight | 75 kg / 62 kg |
| Power supply | 12 V DC / 24 V DC / 220 V AC |
| Refrigerant | R134a or R600a, depending on build |
| Shelving | White coated wire shelves, adjustable in side slots |
| Condenser | Open wire coil on the rear face, fan and louvres in the base |
| Finish | White body, black door frame and plinth |
| Loading | 72 units per 40′HQ |
| Options | Header insert artwork, cabinet colour, voltage configuration, packaging |
Questions buyers ask before ordering
Can the same cabinet run on solar and on mains?
The build accepts 12 V DC, 24 V DC and 220 V AC. Tell us which one the site will use first, because the compressor and the mains option are specified together. A cabinet installed on mains today can be moved to a battery bank later without replacing the cabinet, provided the DC voltage is declared at the time of order.
How many shelves come with it?
Shelves are wire, adjustable in the side slots, and the quantity is set per order so that the cabinet matches what the shop actually sells - tall bottles need fewer shelves than cans. Confirm the shelf count with the order; extra shelves can be supplied in the same shipment.
Will it hold 4 °C in a hot shop?
The declared range is 0 to 10 °C and the rear condenser is open to the air specifically so that it can shed heat in a hot room. What decides the outcome on site is rear clearance, how often the door is opened, and whether the coil is kept clean. Set the dial to the lower half of the band in ambient above 30 °C, and check with a thermometer rather than by touch.
Can the header show our own brand?
Yes. The header is a printed insert behind a diffuser, so it can carry a distributor's artwork, a shop name or a promotion. Send the artwork with the order and it is fitted before packing.
What is the minimum order?
A single cabinet can be shipped, and 72 units fill a 40′HQ. Mixed containers with other models from the same range are quoted per order, and the loading plan is confirmed before production.
Tell us the site, the ambient temperature, the opening hours and whether the site will run on mains or a battery bank. We will come back with the voltage configuration, the shelf layout and the header insert spec for your market.
Inside the factory that builds this system
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Hangzhou Juka Solar Technology was founded in 2015 around one problem: putting solar energy, new energy and smart control to work inside a refrigeration circuit. The range has since grown from a single DC chest freezer to solar refrigerators, solar ice makers, mobile ice-cream carts, delivery tricycles and beverage retail carts - all of them exported, most of them to Belt and Road markets. The work does not stop at the container. Partners in Ghana, Gabon, Cameroon, Nigeria, Kazakhstan and India are supported in setting up their own local production for retail and delivery refrigeration, which is how a cold chain becomes permanent rather than a series of one-off shipments. For a solar system this matters more than for a mains-only freezer. Panel sizing, controller rating and battery capacity all depend on cabinet volume and site conditions, so the cabinet and the electronics are engineered together instead of being bought separately by the importer. |
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What is decided before the cabinet is built
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Wall thickness is a production parameter 65 mm or 110 mm foam is set on the foaming line, not assigned in a brochure. Insulation that is specified but not achieved is the usual reason a solar cabinet underperforms in its first hot season. |
One bill of materials Panel, controller, battery and cabinet are listed together, so the importer receives a system whose parts were sized against each other rather than sourced independently. |
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Voltage as an order option DC input, AC adapter voltage, plug type and control panel artwork are selected per market on the same platform - no separate tooling run for a different destination. |
Repeatable on the second container Foam thickness, fittings and controller model are held per customer, so a follow-up order matches the first one instead of drifting. |
Certification and test documentation
CE marking covers the electrical arrangement, and utility model patents cover the cabinet and the direct-drive control layout. Documents travel with the order so they can be presented at customs and to institutional or tender buyers.
CE - low voltage and EMC |
CE - supplementary schedule |
Utility model patent - cabinet structure |
On the floor
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Six control points behind every cabinet
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Foaming runs inside a constant 20-23 °C room, so the foam quality does not shift with the season. |
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Condenser and evaporator are nitrogen purged before any pipe joint is made, keeping the internal circuit clean. |
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Vacuum is pulled to below 20 Pa. A unit that does not reach spec is never charged with refrigerant. |
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Two leak tests per cabinet with an INFICON detector - one unpowered, one running. |
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A constant-temperature test room confirms refrigeration parameters under identical conditions all year. |
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Production and quality control are separate departments. Only cabinets signed off by a QC inspector are packed and warehoused. |
Machines on the line
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Equipment |
What it gives the buyer |
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Automatic laser cutting machine |
Consistent panel geometry, tight tolerances, clean edges |
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Punch press and bending machine |
Repeatable cabinet forming from unit to unit |
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Dual-gun high-pressure foaming machine |
Even density across the whole cabinet, no thin spots |
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CACL high-precision filling machine |
Precise refrigerant charge on every unit |
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INFICON high-sensitivity leak detector |
Finds leaks that ordinary detectors pass |
OEM, ODM and local assembly
Cabinet-only supply, private label, SKD and CKD shipments are all available, together with technical guidance for partners who would rather assemble locally than import finished units. Helping partners build their own refrigeration business is the part of the work that outlasts a single purchase order.
What can be changed on a standard order:
✓ Customer logo and cabinet colour
✓ Voltage options and plug type
✓ Packaging design
✓ Product configuration, baskets and fittings
✓ Panel, controller and battery included, or cabinet supplied on its own
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