JPH0315960Y2 - - Google Patents

Description

[Detailed description of the invention] This proposal relates to a workbench such as a cooking table or a sink that incorporates a hot water supply device that utilizes the exhaust heat of the refrigerator, which can be freely connected to the refrigerant piping of an existing refrigerator located separately. .

Conventional water heaters had to be assembled and constructed separately from the workbench at each site, which took a long time to assemble and required space to be installed separately from the workbench. It is difficult to construct, and in the end, it has to be large and large-scale, which increases the construction cost.
Moreover, the water heater is exposed to the outside, making it untidy and unsightly, and exposed to the outside air and covered with dust and moisture, making it susceptible to dirt and corrosion over short periods of time.

On the other hand, at sites where air-cooled refrigerators are installed in work rooms such as kitchens and stores, the waste heat is trapped in the work room, causing workers to feel hot, resulting in a deterioration of the working environment. The current situation is that the high-pressure operation of the refrigerator reduces the cooling capacity of the refrigerator, creating a vicious cycle, and even in work rooms equipped with air conditioning equipment, the waste heat from air-cooled refrigerators becomes a large air conditioning load. .

In view of the above-mentioned drawbacks of the conventional method, this proposal involves installing a water heater that utilizes the exhaust heat of the refrigerator into the casing at a separate factory, etc., and then positioning and installing a workbench at the construction site, simply installing the refrigerant piping of the existing refrigerator at a separate location. We aim to provide a workbench that can be completed by simply connecting it to the water supply pipes, can constantly supply hot water at a predetermined temperature without installing a special heater in the water supply system, and improves the working environment. It is something to do.

A first embodiment of the present invention applied to a cooking table will be described with reference to FIGS. 1 to 3.

As shown in Fig. 1, the workbench A of this project is a conventional refrigerator installed separately, which is equipped with a liquid receiver A, an electromagnetic shut-off valve B, an expansion valve C, an evaporative cooler D, a compressor E, and a condenser H. A water heater C that utilizes the exhaust heat of B is built into a stainless steel casing 2 whose bottom four corners are supported by legs 1, and is connected to the inlet and outlet ends 3a and 3b of the refrigerant conduction pipe 3 of the water heater C and the water supply. Piping 4 input end 4a
and the outlet end 5a of the hot water pipe 5 to the back part 6 of the workbench plate 6.
At the upper end of the casing 2, the refrigerant pipes T and J of the refrigerator B, the water pipe α and the faucet or the hot water supply pipe β are exposed so as to be freely connected to joints (not shown), and the outlet end 7a of the drain pipe 7 is connected to the bottom surface of the casing 2. It is exposed so as to be freely connected to the drain guide pipe γ and a joint (not shown).

As shown in FIGS. 1 and 3, the water heater C
is a check valve 8 sequentially starting from the inlet end 3a of the refrigerant conduction pipe 3.
, a coil-shaped heat exhaust device 10 installed in a closed hot water storage tank 9 having a water supply pipe 4, a hot water discharge pipe 5, and a drain pipe 7, and a discharge pressure control valve 11 are successively interconnected and communicated over the outlet end 3b. On the other hand, one end of the pressure equalization bypass pipe 13 with the manual stop valve 12 interposed in the middle is connected to the refrigerant communication pipe 3 on the outlet side of the check valve 8 and the other end on the outlet side of the discharge pressure control valve 11, and the other The bypass hot water drain pipe 15 joins the hot water discharge pipe 5 on the outlet side of the pump 14 interposed in the middle, and the overflow pipe 17 joins the drain pipe 7 on the outlet side of the manual drain valve 16 interposed in the middle, and the water supply pipe A ball tap 18 is attached to the inner end of the hot water storage tank 9 of No. 4, which can freely supply water under level control.

In the figure, reference numeral 19 denotes an operation display panel attached to a top plate 2a that is removably attached to one side of the front surface of the casing 2, and indicates the pump earth leakage breaker 20, the pump switch 24, and the hot water storage L in the hot water storage tank 9. For example, a lamp 22 that lights up when the temperature is above the desired 40°C, a lamp 23 that lights up when the temperature is below the desired 40°C, and a thermometer 24 are mounted, and a ventilated armor plate 2b is removably stretched on the other front side of the casing 2. Become.

Next, a second embodiment of the present invention will be explained with reference to FIG.

In the workbench A' of the present invention, the workbench plate 6' is provided in the workbench A of the first embodiment by extending one end of the workbench plate 6 to protrude, and the lower side of the protrusion is connected to the refrigerant of the refrigerator B. There is no room for connection piping with pipes T, J, water pipe α and hot water pipe β, casing 2 side 2 on the side with such room
The inlet and outlet ends 3a and 3b of the refrigerant conduction pipe 3, the inlet end 4a of the water supply pipe 4, and the outlet end 5a of the hot water discharge pipe 5 are exposed.

The rest is the same as the first embodiment, so the same parts are given the same reference numerals.

Since the present invention is constructed as described above, the workbenches A and A' of the present invention are manufactured separately in advance at a factory, etc., and then transported to the site and installed at the desired position. Next, the refrigerant pipes T and J from the existing refrigerator B installed elsewhere and the inlet and outlet ends 3a and 3b of the refrigerant conduction pipe 3 of the water heater C are jointed together as shown in Fig. 1, and the water pipe α and the water supply pipe 4 are Inlet end 4a, outlet end 5 of discharge pipe 5
A and the faucet or hot water lead pipe β are jointed to the outlet end 7a of the drain pipe 7 and the drain lead pipe γ, if necessary.

First, like a normal refrigerator B, operate the condenser, receiver A, electromagnetic on-off valve B, expansion valve C, evaporative cooler D, and compressor E.

The refrigerant gas evaporated and gasified in the evaporative cooler D is sucked and compressed by the compressor E. At this time, the refrigerant gas is compressed to the pressure set by the discharge pressure control valve 11 and is sent through the heat exhaust device 10 for hot water supply. Exhaust heat to the water storage L. At this time, since the discharge pressure control valve 11 is provided, regardless of the temperature of the cooling water and cooling air to the condenser, if the temperature of the hot water storage water L is lower than the temperature corresponding to the set pressure of the discharge pressure control valve 11, the refrigerant gas is gives condensation heat to hot water storage water L for condensation. The condenser serves as a device for supercooling the refrigerant liquid. Thereafter, the refrigerant liquid sequentially flows through the liquid receiver A, the expansion valve C, and the evaporative cooler D, completing one refrigeration cycle.

Next, the temperature of the stored water L for hot water supply is displayed on the thermometer 24, and when it becomes higher than the temperature corresponding to the set pressure of the discharge pressure control valve 11, the lamp 22 lights up and the refrigerant gas cannot be condensed and liquefied in the hot water exhaust heat exchanger 10. When the pressure starts to increase, the discharge pressure control valve 1
1 begins to open in order to maintain the set pressure, and in the hot water exhaust heat exchanger 10, heat exchange is performed for only the portion of the refrigerant gas whose temperature is higher than the hot water storage water L, and condensation is performed by the condenser.

The capacity of the condenser is originally designed for the purpose of cooling and condensing superheated refrigerant gas, so when the load of superheated refrigerant gas is removed, it acts as a supercooler for the refrigerant, and for this reason, the refrigeration cycle flow is reduced. stability is improved.

Thus, in the water heater C, the discharge pressure control valve 11 is provided on the outlet side of the heat exhaust device 10, so that the amount of exhaust heat to the water heater C is prevented from being reduced due to a decrease in the condensing pressure to the condenser due to a decrease in outside temperature. In addition to stably supplying hot water temperature, a check valve 8 is installed to prevent the liquid condensed in the heat sink 10 from returning to the compressor when the compressor is stopped, thereby preventing valve cracking when the compressor is started. This prevents accidents caused by liquid compression.

In addition, a pressure equalizing bypass pipe 13 is provided between the check valve 8 and the outlet of the discharge pressure control valve 11, and a stop valve 12 is interposed between them, so that it functions as a pressure equalizing pipe by opening the stop valve 12 slightly during general use. to stabilize the operation of the discharge pressure control valve 11, and to stabilize the operation of the discharge pressure control valve 11 in the event that the discharge pressure control valve 1
1 fails, the valve is manually opened to the maximum opening degree and functions as a bypass pipe.

Furthermore, by providing the discharge pressure control valve 11, the discharge pressure of the refrigerant liquid is set to a high pressure in winter, etc., so the pressure can be higher than in the conventional system, so the operating pressure difference of the expansion valve C becomes larger. , the decline in the capacity of the expansion valve is reduced, and a stable flow rate of the refrigerant liquid can be ensured.

In the hot water heat exhaust device 10, the load on the condenser is reduced by the amount of heat exhausted, so the refrigerant liquid can be supercooled by that amount in the condenser, which improves the stability of the refrigeration cycle and increases the capacity of the refrigeration system. can get.

Moreover, regardless of changes in outside air conditions, if the lower limit of the set temperature of the stored water for hot water supply is set using the discharge pressure control valve 11, the hot water supply device C can absorb all of the exhaust heat from the compressor E until the water temperature rises to that temperature. Since the water is supplied to the hot water storage water L, the water temperature rises quickly and is efficient compared to the hot water exhaust heat sink 10 of the same capacity. And since it is not affected by changes in outside air conditions, it is possible to set the hot water temperature throughout the year.

Waste heat from existing refrigerators must be treated using conventional methods such as water-cooled cooling towers, which require external installation space, cost, and time, or waste heat may not be utilized. Rather than a patchy system, it has a built-in water heater that can consistently and consistently provide a constant temperature and amount of hot water.

Therefore, turn pump switch 21 to turn pump 1 on.
4, hot water at a predetermined temperature can always be obtained through the faucet or the hot water pipe β.

According to the present invention, the water heater C is compactly integrated in a separate factory or the like, so the assembly parts are standardized, mass production is possible, maintenance, inspection and repair are easy, and manufacturing costs can be significantly reduced.

Moreover, since almost no heat is exhausted from the refrigerator itself, the work environment in the work room is improved, the air conditioning load on the air conditioning equipment is kept small, the cooling capacity of the refrigerator is improved, and energy savings can be achieved.

In addition, on-site construction is simplified and shortened, there is no need to consider the space for installing the water heater C other than the space for installing workbenches A and A', and the water heater C is also protected by the casing 2, resulting in a long life and excellent aesthetic appearance. It exhibits excellent practicality and usefulness, such as fulfilling the original function of a workbench.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the combined operation of the water heater built into this project and the existing refrigerator, Figure 2 is an external perspective view showing the first embodiment of the workbench of this invention, and Figure 3 is the water heater built into this project. FIG. 4 is a front view showing a second embodiment of the proposed workbench. A, A'...Workbench, B...Freezer, C...Water supply device, L...Water storage for hot water supply, α...Water piping, β
...Hot water guide pipe, γ...Drain guide pipe, 2...
Casing, 2c...Side surface, 3...Refrigerant conduction piping, 3a, 4a...Inlet end, 3b, 5a, 7a...
Output end, 4...Water supply piping, 5...Hot water discharge piping, 6,
6'... Working table plate, 6a... Back part, 7... Drain piping, 8... Check valve, 9... Hot water tank, 10
... Heat exhaust device, 11 ... Pressure control valve, 12 ... Stop valve, 13 ... Pressure equalization bypass pipe, G, J ... Refrigerant piping.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Sequentially installing a check valve in a refrigerant communication pipe, a heat exhaust device installed in a hot water storage tank equipped with a water supply pipe, a hot water discharge pipe, and a drain pipe, and a discharge pressure control valve. A water heater in which one end of a pressure equalizing bypass pipe with a stop valve interposed in the middle is connected to the refrigerant communication pipe on the exit side of the check valve and the other end on the outlet side of the discharge pressure control valve, respectively. is integrated into a casing on which a work table is mounted, so that the exhaust heat of a refrigerator separately installed in a separate work room can be used freely, and the refrigerant conduction pipe inlet/output end, the water supply pipe inlet end, and the hot water outlet are integrated. The piping outlet end and the drain piping are connected to the refrigerant piping, water piping, hot water piping, and drain induction piping from the refrigerator installed in the work room at corresponding joints, respectively, and are exposed outside the casing and connected to the hot water supply device. A workbench that saves energy without installing a special heater, and eliminates the reduction in cooling capacity of a refrigerator and the deterioration of the working environment due to the rise in the working room temperature due to exhaust heat. 2. The workbench according to claim 1, wherein the inlet and outlet ends of the refrigerant conduction pipe, the inlet end of the water supply pipe, and the outlet end of the hot water discharge pipe of the water heater are exposed at the upper end of the back portion of the workbench plate. 3. The inlet and outlet ends of the refrigerant conduction pipe, the inlet end of the water supply pipe, and the outlet end of the hot water discharge pipe of the water heater are exposed on the outer surface of the casing in an example in which the work table plate is extended. workbench.