JPS6030687Y2 - Refrigerated truck - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to prevent the temperature inside the freezer compartment from rising when the vehicle stops mid-way and the engine is temporarily stopped, regarding a freezer vehicle equipped with a mechanical refrigeration device. It is something.

A refrigerated vehicle with a mechanical refrigeration system consisting of a compressor, condenser, expansion valve, and evaporator that is driven by the vehicle engine via a belt may be stopped during lunch or when a portion of the cargo is unloaded for delivery. If the engine is temporarily stopped, the temperature inside the freezer will rise because the refrigeration system will not operate, and there is a risk of damaging the cargo.

Therefore, in the present invention, a case filled with a cold storage agent is disposed near the front of the cold air outlet of the cooling unit of the refrigeration system installed in the freezer compartment.

Thereby, the cold air from the cold air outlet cools the inside of the freezer compartment, and at the same time, effectively cools and freezes the cold storage agent.

When the engine is stopped and the cooling effect of the cold air is stopped, the cool storage agent melts and absorbs the heat inside the room, keeping the room cool, and when the engine is restarted, the cool storage agent is effectively cooled and frozen, allowing the next engine to run. Prepare for an outage.

The illustrated embodiment will be described below.

In the refrigerating vehicle shown in FIG. 1, 1 is a compressor assembly including a compressor driven by an engine;
2 is a condensing unit with a built-in capacitor, 3
4 is an expansion valve, and 4 is a cooling unit that includes a built-in evaporator and a fan.

These are connected by pipes to allow refrigerant to flow through them, and the refrigerant compressed and liquefied by the compressor and condenser passes through the expansion valve 3 and is vaporized in the evaporator. As a result, it is released from the cooling unit 4 into the freezer compartment 5 and circulated.

The cooling unit 4 is attached to the upper front corner of the freezer compartment 5, and a case 6 filled with a cold storage agent is installed on the ceiling surface in front of the cold air outlet.

Figures 2 to 4 show examples of the above-mentioned case installed in the refrigerated vehicle of the present invention, all of which are constructed of thin metal plates with high thermal conductivity.

The case 6a in FIG. 2 is covered with the thin metal plate, has a thin rectangular outer shape, and has a sealed internal space filled with a regenerator.

The case 6a has flanges at both ends, and the two screws that are screwed to the ceiling of the freezer compartment 5 are placed on the metal fittings 7.7 and fixed to the metal fittings by welding or gluing. has been done.

The case 6b in FIG. 3 has a sealed space covered with an outer wall 61, an inner wall 62, and both end walls 63 made of thin metal plates, and has a through hole 64 surrounded by the inner wall 62 in the center, and has a sealed space. is filled with cold storage agent.

The mounting screwed onto the ceiling surface of the freezer compartment is held by a metal fitting 7.

The case 6c in FIG. 4 is made up of a plurality of metal cylindrical bodies 6'c, 6'c... each having a sealed space inside, and the space is filled with a refrigerant, similar to the above embodiment. For installation, use metal fittings 7
．． It is held at 7.

All of these cases have shapes that increase the surface area, and in particular, the case 6b has a large surface area because it has a through hole 64, and the case 6c has a large number of cylindrical cases.

As described above, when the engine of a refrigerating vehicle equipped with a refrigerant filling case is started, the compressor is activated, and cold air is blown from the cooling unit 4 into the freezer compartment 5 to cool the interior.

At the same time, the cold air causes the case 6 in front of the cold air outlet to
The cold storage agents in a to 6c are efficiently cooled and frozen to store cold.

Next, when the engine is stopped, the supply of cold air from the cooling unit 4 is stopped, but the heat inside the freezer compartment is absorbed by the melting of the frozen cold storage agent, and the interior of the compartment is kept cool without rising in temperature.

When the engine is started again, the cold air blows out to cool the freezer compartment, and at the same time, the cold storage agent is frozen in preparation for the next engine stop.

In this way, the refrigerated vehicle of the present invention uses cold air to cool the inside of the refrigerated compartment while the vehicle is running, and uses a cold storage agent to keep the refrigerated compartment cool when the vehicle is parked with the engine temporarily stopped, such as during lunch or when delivering cargo. In addition, when cooling the freezer compartment with cold air, this cold air effectively acts on the cold storage agent to freeze it as quickly as possible, preparing it for cold storage at the next stop.

Therefore, the present invention is particularly effective when the refrigerated vehicle is used under operating conditions in which the vehicle stops frequently on the way.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial cross-sectional view of a refrigerated vehicle according to the present invention, and FIGS. 2 to 4 are perspective views showing embodiments of a cold storage agent filling case. 1... Compressor assembly, 2...
... Condensing unit, 3... Expansion valve,
4... Cooling unit, L 6a, sb,
6c...Cold storage agent filling case.

Claims (1)

[Scope of utility model registration request] In a refrigerating vehicle equipped with a mechanical refrigeration device that is driven by the vehicle's engine and blows cold air into the freezer compartment from the cold air outlet of the cooling unit, a case filled with a cold storage agent is installed near the front of the cold air outlet. Features: Refrigerated vehicle.